JP2008224132A - Air-conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air-conditioner capable of performing automatic functional operation without giving noises and displeasure to a user. <P>SOLUTION: The air-conditioner uses a human body detecting sensor provided in an indoor unit for detecting the existence or not of a person to control the operation. During normal operation, when the human body detecting sensor detects no existence of a person for a first predetermined time, the air-conditioner performs power saving operation less in power consumption than the normal operation. When the human body detecting sensor checks no existence of a person for a second predetermined time shorter than the first predetermined time, the air-conditioner performs at least one of filter cleaning, indoor heat exchanger drying operation, ventilating operation more functional than the normal operation, air cleaning operation more functional than the normal operation, and oxygen enriching operation more functional than the normal operation. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an air conditioner provided with a human body detection sensor for detecting the presence or absence of a person in an indoor unit, and more particularly to a technique for detecting the presence of a person in a room and controlling the operation of the indoor unit different from that during normal operation. .

  Conventionally, an air conditioner has been proposed in which the air conditioner has various functions different from normal operation. For example, an air conditioner having an air purifying function, a ventilation function or an oxygen-enriched air supply function has been developed, and there has been a health-oriented boom in recent years, and many air conditioners having these functions have been put into practical use. This type of air conditioner detects indoor dirt, and operates / stops the respective functions or adjusts the operation amount according to the detected value, thereby maintaining the room in a comfortable environment.

  To reduce the maintenance work of the air filter, the dust on the filter is sucked by the suction fan from the dust suction part that can move freely on the filter, and the dust is stored in the dust storage part via the suction duct. An air conditioner with an automatic cleaning function that automatically cleans the dust on the filter has also been proposed (see, for example, Patent Document 2).

  Furthermore, in order to prevent the growth of fungi such as mold caused by the dew condensation water that occurs after performing cooling or dehumidifying operation in the air conditioner, after the cooling or dehumidifying operation is performed, the air blowing operation or automatically A device that performs heating operation, dries the inside of the air conditioner indoor unit, and suppresses the growth of fungi such as fungi has been proposed (for example, see Patent Document 3).

JP-A-6-347080 JP 2002-340395 A Japanese Patent Laid-Open No. 10-62000

  However, in an air conditioner having the above functions, it is necessary to perform these functional operation separately from the normal operation, and it is almost always performed by the user. This operation must be performed by the user himself / herself, and if this operation is forgotten, the special functions will not work.

  Further, for example, the air cleaning function, the ventilation function, or the oxygen-enriched air supply function can be performed simultaneously with the normal operation. However, if this is performed during the normal operation, it causes noise. In addition, for example, when the ability to be used in combination with normal operation, such as when the air is very dirty, may not be sufficient effect, but if this ability is improved, further noise reduction Cause.

  The present invention has been made in view of such problems of the prior art, and is an air conditioner that can automatically perform the above functions without causing the user to feel noise or discomfort. The purpose is to provide.

In order to achieve the above object, the invention according to claim 1 of the present invention is an air conditioner that controls the operation by detecting the presence or absence of a human by a human body detection sensor provided in an indoor unit. ,
During normal operation, when the absence of a person is detected by the human body detection sensor for a first predetermined time, a power-saving operation with less power consumption than during normal operation is performed, and a second predetermined time longer than the first predetermined time. When the absence of a person is confirmed by the human body detection sensor for a period of time, cleaning of the filter, drying operation of the indoor heat exchanger, ventilation operation with improved performance compared to normal operation, air purification with improved performance than normal operation It is characterized in that at least one of the oxygen enrichment operation in which the capacity is improved as compared with the operation and the normal operation is performed.

  In the invention according to claim 2, when the presence of a person is detected by the human body detection sensor during each operation of the ventilation operation, the air cleaning operation, or the oxygen enrichment operation whose performance has been improved from that in the normal operation. Is characterized by returning to the normal operation state.

Furthermore, the invention according to claim 3 is a sensor capable of detecting an oxygen concentration;
When the oxygen concentration detected by the sensor is within a preset oxygen enrichment region, the oxygen enrichment operation is performed, while when the oxygen concentration detected by the sensor is outside the oxygen enrichment region, the oxygen enrichment operation is performed. Control is performed to stop the enrichment operation.

The invention according to claim 4 is a dirt detection sensor capable of detecting air cleanliness,
When the air cleanliness detected by the sensor falls within a preset air cleanliness area, the air cleanup operation is performed, while when the air cleanliness detected by the sensor falls outside the air cleanliness area, the air cleanliness Control is performed to stop the operation.

  According to the present invention, the filter cleaning, the drying operation of the indoor heat exchanger, the ventilation operation in which the capacity is improved from the normal operation, the air cleaning operation in which the capacity is improved from the normal operation, the oxygen enrichment in which the capacity is improved from the normal operation. In the operation, the generation of sound is large, and the user is not heard by performing the driving and the ability-improving driving when the person is absent. In addition, the normal operation ventilation operation, the air purification operation, and the oxygen enrichment operation are operations with the ability to be operated in parallel with the air conditioner.

  In addition, the filter cleaning removes dust from the filter to which dust has adhered by the operation of the air conditioner, so the air flow is reversed from the operation of the air conditioner, and the drying operation of the indoor heat exchanger is Heating operation is performed in order to dry the heat exchanger that is condensed by the cooling operation of the air conditioner, and the user feels uncomfortable when it is operated in the presence of a person. In other words, the filter cleaning and the drying operation of the indoor heat exchanger do not operate simultaneously with the air conditioner, and are performed by stopping the operation of the air conditioner.By performing these operations in the absence of a person, Since driving that is different from the driving intended by the user is not performed, the user does not feel uncomfortable.

  Note that the dry operation, air purification operation, and oxygen-enriched operation, which have improved performance compared to normal operation, increase the noise of the fan and become annoying, so when a person is detected, the original quiet normal operation By returning to operation, the user will not hear any noise. In other words, when the presence of a person is detected, each operation is returned to the normal operation state, thereby improving the indoor environment (ventilation, air purification, oxygen enrichment) without letting the user hear noise. Can be planned.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 3B, an air conditioner used in a general home is composed of an outdoor unit 1 and an indoor unit 2 that are connected to each other by a normal refrigerant pipe, and FIGS. 1 and 2 show the present invention. The indoor unit of this air conditioner is shown.

  As shown in FIG. 3B, the outdoor unit 1 and the indoor unit 2 constituting the air conditioner are connected by a refrigerant pipe (not shown) so that the refrigerant gas circulates. The outdoor unit 1 includes a compressor 43, a heat exchanger 44, and a fan 45, and main components of an oxygen gas enrichment device such as a gas enrichment unit 46 and a decompression pump 47 are provided across a chamber. It has been. The indoor unit 2 includes a fan 8 and a heat exchanger 6 and a discharge port 42 of an oxygen gas enrichment device. Details of the operation of the oxygen gas enrichment apparatus will be described later.

  The indoor unit has a main body 2 and a movable front panel (hereinafter simply referred to as a front panel) 4 that can freely open and close the front opening 2a of the main body 2, and the front panel 4 is the main body 2 when the air conditioner is stopped. While the front opening 2a is closed in close contact with the front, the front panel 4 moves in a direction away from the main body 2 to open the front opening 2a during operation of the air conditioner. 1 shows a state in which the front panel 4 closes the front opening 2a, and FIG. 2 shows a state in which the front panel 4 opens the front opening 2a.

  As shown in FIG. 3A, in the main body 2, the heat exchanger 6 and the indoor air taken in from the front opening 2 a and the top opening 2 b are exchanged by the heat exchanger 6 and blown out into the room. The fan 8, the upper and lower blades 12 that open and close the air outlet 10 that blows the heat-exchanged air into the room and change the air blowing direction up and down, and the left and right blades that change the air blowing direction left and right (not shown) The middle blade 14 that opens and closes on the air outlet 10 side of the front opening 2a is swingably attached to the main body 2 below the front opening 2a via the middle blade drive mechanism 16. . Further, the upper part of the front panel 4 is connected to the upper part of the main body 2 through two arms 18 and 20 provided at both ends thereof, and drive control of a drive motor (not shown) connected to the arm 18 is performed. Thus, during operation of the air conditioner, the front panel 4 moves forward and obliquely upward from the position when the air conditioner is stopped (closed position of the front opening 2a). The upper and lower blades 12 are connected to the lower part of the main body 2 via two arms 22 and 24 provided at both ends thereof, and a driving method thereof will be described later.

  As shown in FIGS. 1B and 1C, a plurality of (for example, five) sensor units 26, 28, 30, 32, and 34 are provided on the upper portion of the front panel 4 from the main plane of the front panel 4. The sensor unit 26, 28, 30, 32, 34 is held by a sensor holder 36 as shown in FIG. 4. The human body detection device is covered with a cover 5 as shown in FIG. 1A, and FIG. 1B shows a state where the cover 5 is removed.

  Each sensor unit 26, 28, 30, 32, 34 is provided in the upper part of the front panel 4, as shown in FIG. This is for enlarging (a human body position discriminating region described later) and securing a far field of view to the maximum extent. Further, as shown in FIG. 5 (b), the visual field range can be secured farther by moving the front panel 4 forward from the stop position at the start of operation, and also shown in FIG. 5 (c). Thus, the visual field range can be further expanded by moving the front panel 4 obliquely upward from the stop position. The positions of the sensor units 26, 28, 30, 32, and 34 are not limited to the upper part of the front panel 4, and even when the front panel is not movable, the human body detection device is placed on the upper part of the front panel or the main body. By attaching to the upper part, the visual field range can be expanded compared to the case of attaching to the lower part.

  Further, as shown in FIG. 5D, the sensor units 26, 28, 30, 32, 34 are provided so as to protrude from the main plane of the front panel 4. , 34 can be arranged further forward, and as shown in FIGS. 5B to 5D, the components of the indoor unit (for example, the upper and lower blades 12 and the front panel 2a with the front opening 2a opened) 4) and the like can be prevented, and the visual field range can be expanded.

  In the present embodiment, each sensor unit 26, 28, 30, 32, 34 is provided on the front panel 4, so that when the front panel 4 opens the front opening 2a, it is attached to the front panel 4. It will move and will protrude further forward.

  The sensor unit 26 includes a circuit board 26a, a lens 26b attached to the circuit board 26a, and a human body detection sensor (not shown) mounted inside the lens 26b. The same applies to the other sensor units 28, 30, 32, and 34. Furthermore, the human body detection sensor is configured by, for example, an infrared sensor that detects the presence or absence of a person by detecting infrared radiation emitted from the human body, and a pulse that is output in response to a change in the amount of infrared detected by the infrared sensor. The presence or absence of a person is determined by the circuit board 26a based on the signal. That is, the circuit board 26a functions as presence / absence determination means for determining the presence / absence of a person. Hereinafter, a sensor and a lens paired with each other are referred to as a sensor / lens pair.

  Here, in order to obtain the detection areas in the front and rear, right and left directions, it is conceivable to arrange the sensor units 26, 28, 30, 32 and 34 on the surface of an arbitrary sphere Z as shown in the side view of FIG. . In this case, the optical axes of the sensor / lens pairs of the sensor units 26, 28, 30, 32, and 34 intersect at the center P of the sphere Z and are not in a twisted position. When viewed from the indoor unit, the sensor units 26, 28, 30, 32, and 34 are projected on the surface of the sphere Z in the front-rear direction, so it is difficult to reduce the size of the human body detection device.

  Further, in order to suppress the above-described jumping out of the sensor unit, an arbitrary sphere Z is cut out at an arbitrary plane X as shown in FIG. 7, and the optical axis of the plane X and each of the sensor units 26, 28, 30, 32, and 34 is cut. It is also conceivable to arrange each sensor unit 26, 28, 30, 32, 34 at the intersection with (not the twist position). In this case, the arrangement of the sensor units 26, 28, 30, 32, and 34 is less likely to jump out in the front-rear direction as shown in the front view of FIG. The arrangement of sensor units having different distances from each other is dispersed in the vertical and horizontal directions, and there is a limit to downsizing the human body detection device.

  Therefore, in the present embodiment, the optical axes of the sensor / lens pair of the sensor units 26, 28 are on the same plane, and the optical axes of the sensor / lens pair of the sensor units 30, 32, 34 are on the same plane. However, the optical axis of the sensor / lens pair of the sensor units 26 and 28 and the optical axis of the sensor / lens pair of the sensor units 30, 32, and 34 are not on the same plane, but are twisted. Each circuit board 26a, 28a, 30a, 32a, 34a is attached to the sensor holder 36 at a predetermined angle.

  Thus, by setting the optical axis of the sensor / lens pair of the sensor unit having a different distance between the detection area and the indoor unit to the twisted position, as shown in FIGS. 1 and 2, the sensor units 26, 28, 30, 32 and 34 can be arranged substantially linearly in the lateral direction, and the human body detection device can be downsized.

  Although an example in which sensor units having different distances from the indoor unit to the detection area of the sensor unit are arranged in a substantially straight line in the lateral direction has been described, sensor units having different left and right directions are substantially straight in the height direction of the indoor unit. The same can be said for the case of the arrangement.

  As described above, according to the present embodiment, among the plurality of sensor units 26, 28, 30, 32, and 34 provided in the indoor unit, sensors having different distances between the visual field area of the sensor unit and the air conditioner Since the optical axes of the sensor / lens pair of the unit are twisted with respect to each other, the sensor units 26, 28, 30, 32, and 34 can be installed so as not to jump out of the front panel 4 of the indoor unit. The human body detection device can be downsized.

  Further, by arranging the sensor units 26, 28, 30, 32, 34 on a substantially straight line, the sensor units 26, 28, 30, 32, 34 are not dispersed in the vertical and horizontal directions, and the sensor units 26, 28, The size of 30, 32, 34 can be reduced.

  In addition, a plurality of sensor units 26, 28, 30, 32, and 34 in which the optical axes of the sensor / lens pairs are in a twisted position are provided in the human body detecting device, and the optical axes of the sensor / lens pairs are arranged in the visual field direction. Since it is arranged so as to face, it is possible to form a plurality of detection areas in the distance direction and a plurality of detection areas in the left-right direction when viewed from the human body detection device, and downsize the lens by improving the light collection efficiency Is possible.

FIG. 9 shows human body position determination areas detected by the sensor units 26, 28, 30, 32, and 34. The sensor units 26, 28, 30, 32, and 34 each have a person in the next area. Can be detected.
Sensor unit 26: area A + C + D
Sensor unit 28: Area B + E + F
Sensor unit 30: area C + G
Sensor unit 32: Area D + E + H
Sensor unit 34: area F + I

  That is, in the indoor unit of the air conditioner according to the present invention, the area that can be detected by the sensor units 26 and 28 and the area that can be detected by the sensor units 30, 32, and 34 partially overlap, and the number of areas A to I A smaller number of sensor units is used to detect the presence or absence of a person in each of the areas A to I.

  In addition, by attaching at least three human body detection sensors to the upper part of the indoor unit, the position of the human body in the room can be two-dimensionally grasped in the perspective direction and the horizontal direction with respect to the indoor unit, that is, where on the indoor floor. Can do. FIG. 10 shows an area to be detected when three human body detection sensors are provided. In the example of FIG. 10, the presence or absence of a person in the area near the indoor unit is detected by one human body detection sensor. The presence or absence of a person in an area far from the machine is detected by two human body detection sensors.

  Returning to FIG. 9, this embodiment will be further described. In the following description, the sensor units 26, 28, 30, 32, and 34 are replaced with the first sensor 26, the second sensor 28, the third sensor 30, 4 sensors 32 and a fifth sensor 34. Since the areas C, D, E, and F are detected by two sensors, the areas other than the overlapping areas (areas A, B, G, H, and I) are detected by one sensor. Therefore, it is called a normal area. The overlapping area is divided into left overlapping areas C and D and right overlapping areas E and F.

  FIG. 11 is a flowchart for setting region characteristics to be described later in each of the regions A to I using the first to fifth sensors 26, 28, 30, 32, and 34. FIG. FIG. 11 is a flowchart for determining in which of the areas A to I a person is located by using the fifth to fifth sensors 26, 28, 30, 32, and 34, and determining the position of the person with reference to these flowcharts The method will be described below.

  In step S1, the presence or absence of a person in the left overlapping region is first determined at a predetermined period T1 (for example, 5 seconds), and in step S2, a predetermined sensor output is cleared under a predetermined condition.

  Table 1 shows a method of determining the left overlapping region. When one of the three reaction results shown in Table 1 is satisfied, the outputs of the first sensor 26 and the third sensor 30 are cleared. . Here, 1 is defined as a response, 0 is defined as no response, and clear is defined as 1 → 0.

  In step S3, the presence / absence of a person in the right overlapping region is further determined in the above-described predetermined period T1, and in step S4, a predetermined sensor output is cleared under a predetermined condition.

  Table 2 shows a method for determining the right overlapping region. When one of the three reaction results shown in Table 2 is satisfied, the outputs of the second sensor 28 and the fifth sensor 34 are cleared. .

  Moreover, when it corresponds to either of the six reaction results shown in Table 1 and Table 2, the output of the 4th sensor 32 is also cleared and it transfers to step S5. In step S5, the presence / absence of a person in the normal region is determined based on Table 3 in the above-described predetermined cycle T1, and in step S6, all sensor outputs are cleared.

  Furthermore, a case where the presence / absence of a person in the areas A, B, and C is determined using only the outputs from the first to third sensors 26, 28, and 30 will be described with reference to FIG.

  As shown in FIG. 13, when all of the first to third sensors 26, 28, and 30 are OFF (no pulse) in the period T1 immediately before the time t1, the person in the regions A, B, and C at the time t1 It is determined that there is no yes (A = 0, B = 0, C = 0). Next, during the period from time t1 to time t2 after period T1, only the first sensor 26 outputs an ON signal (with a pulse), and when the second and third sensors 28, 30 are OFF, at time t2. It is determined that there is a person in the area A and there are no persons in the areas B and C (A = 1, B = 0, C = 0). Further, when the first and third sensors 26 and 30 output the ON signal from the time t2 to the time t3 after the period T1, and the second sensor 28 is OFF, a person is in the region C at the time t3. It is determined that there are no people in the areas A and B (A = 0, B = 0, C = 1). Hereinafter, the presence / absence of a person in each of the areas A, B, and C is similarly determined for each period T1.

  Actually, the first to fifth sensors 26, 28, 30, 32, and 34 are used to determine in which area of the areas A to I a person is present. Based on each of the areas A to I, a first area where the person is good (a place where the person is good), a second area where the time where the person is short is short (an area where the person simply passes, an area where the stay time is short, etc. ), And a third area (a non-living area such as a wall or a window where people hardly go) is distinguished. Hereinafter, the first region, the second region, and the third region are referred to as a life category I, a life category II, and a life category III, respectively, and the life category I, the life category II, and the life category III are respectively a region characteristic I. It can also be referred to as a region of region characteristic II, region of region characteristic II, and region of region characteristic III. In addition, life category I (region characteristic I) and life category II (region characteristic II) are combined into a life region (region where people live), while life category III (region characteristic III) is defined as a non-living region (regional characteristic III). The area of life may be broadly classified according to the frequency of the presence or absence of a person.

  This determination is performed after step S7 in the flowchart of FIG. 11, and this determination method will be described with reference to FIGS.

  FIG. 14 shows a case where the indoor unit of the air conditioner according to the present invention is installed in an LD of 1 LDK composed of one Japanese-style room, LD (living room / dining room) and kitchen, and is indicated by an ellipse in FIG. The area shows the well-placed place where the subject reported.

  As described above, the presence / absence of a person in each of the areas A to I is determined every period T1, and 1 (with a reaction) or 0 (without a reaction) is output as a reaction result (determination) in the period T1. Is repeated a plurality of times, and in step S7, it is determined whether or not the cumulative operation time of a predetermined air conditioner has elapsed. If it is determined in step S7 that the predetermined time has not elapsed, the process returns to step S1. On the other hand, if it is determined that the predetermined time has elapsed, two reaction results accumulated in the predetermined time in each region A to I are obtained. Each region A to I is determined as one of the life categories I to III by comparing with the threshold value.

  In more detail with reference to FIG. 15 showing the long-term accumulation result, the first threshold value and the second threshold value smaller than the first threshold value are set, and in step S8, the long-term accumulation result of each region A to I is set. Is determined to be greater than the first threshold, and the region determined to be greater is determined to be the life category I in step S9. If it is determined in step S8 that the long-term cumulative result of each region A to I is less than the first threshold value, whether or not the long-term cumulative result of each region A to I is greater than the second threshold value in step S10. The region determined to be large is determined to be the life category II in step S11, while the region determined to be small is determined to be the life category III in step S12.

  In the example of FIG. 15, the areas E, F, and I are determined as the life category I, the areas B and H are determined as the life category II, and the areas A, C, D, and G are determined as the life category III.

  FIG. 16 shows the case where the indoor unit of the air conditioner according to the present invention is installed in another LD of 1 LDK, and FIG. 17 discriminates each region A to I based on the long-term accumulation result in this case. Results are shown. In the example of FIG. 16, the areas C, E, and G are determined as the life category I, the areas A, B, D, and H are determined as the life category II, and the areas F and I are determined as the life category III.

  Note that the above-described determination of the region characteristics (life classification) is repeated every predetermined time, but the determination result hardly changes unless the sofa, the table, or the like arranged in the room to be determined is moved.

  Next, the final determination of the presence / absence of a person in each of the areas A to I will be described with reference to the flowchart of FIG.

  Since steps S21 to S26 are the same as steps S1 to S6 in the flowchart of FIG. 11 described above, the description thereof is omitted. In step S27, it is determined whether or not a predetermined number M (for example, 15 times) of reaction results in the period T1 has been obtained. If it is determined that the period T1 has not reached the predetermined number M, the process returns to step S21. If it is determined that the period T1 has reached the predetermined number M, in step S28, the total number of reaction results in the period T1 × M is used as the cumulative reaction period number, and the cumulative reaction period number for one time is calculated. The calculation of the cumulative reaction period is repeated a plurality of times, and it is determined in step S29 whether or not the calculation result of the cumulative reaction period is obtained for a predetermined number of times (for example, N = 4). When the determination is made, the process returns to step S21. On the other hand, when it is determined that the predetermined number of times has been reached, in step S30, the person in each of the areas A to I is determined based on the already determined area characteristics and the predetermined number of accumulated reaction periods. Presence or absence of is estimated.

  In step S31, by subtracting 1 from the calculation number (N) of the cumulative reaction period number and returning to step S21, the calculation of the cumulative reaction period number of times is repeated.

  Table 4 shows a history of reaction results for the latest one time (time T1 × M). In Table 4, for example, ΣA0 means the number of cumulative reaction periods for one time in the region A.

  Here, the cumulative reaction period number of one time immediately before ΣA0 is ΣA1, the previous cumulative reaction period number of ΣA2 is ΣA2,... Presence or absence of a person is estimated from the life category and the cumulative number of reaction periods.

  Next, after the time T1 × M from the above-described determination of the presence / absence of the person, the presence / absence of the person is similarly estimated from the past four histories, life categories, and cumulative reaction period times.

  That is, in the indoor unit of the air conditioner according to the present invention, the presence / absence of a person is estimated using a smaller number of sensors than the number of the discrimination areas A to I. Since there is a possibility that the position is incorrect, avoiding human position estimation in a single predetermined period regardless of whether it is an overlapping area, the region characteristics obtained by accumulating the region determination results for each predetermined period over a long period, and for each predetermined period The region determination results are accumulated N times, and the location of the person is estimated from the past history of the accumulated reaction period times of each region obtained, thereby obtaining the position estimation result of the person with high probability.

  Table 5 shows the time required for the presence estimation and the time required for the absence estimation when the presence / absence of the person is determined as described above and T1 = 5 seconds and M = 12 times are set.

  Thus, after the area to be air-conditioned by the indoor unit of the air conditioner according to the present invention is divided into the plurality of areas A to I by the first to fifth sensors 26, 28, 30, 32, and 34, The region characteristics (life categories I to III) of the regions A to I are determined, and the time required for the presence estimation and the time required for the absence estimation are changed according to the region characteristics of the regions A to I.

  In other words, since it takes about 1 minute for the wind to reach after changing the air conditioning setting, changing the air conditioning setting in a short time (for example, a few seconds) will not only impair comfort, but will also make people short. For such a place, it is preferable not to perform air conditioning so much from the viewpoint of energy saving. Therefore, the presence / absence of a person in each of the areas A to I is first detected, and the air conditioning setting in the area where the person is present is optimized.

  More specifically, with the time required to estimate the presence / absence of an area determined as life category II as a standard, in the area determined as life category I, there is a person at a shorter time interval than the area determined as life category II. In contrast, when there are no more people in the area, the absence of the person is estimated at a longer time interval than the area identified as Living Category II, thereby shortening the time required for the presence estimation. The time required for estimation is set to be long. On the other hand, in the area determined to be life category III, the presence of a person is estimated at a longer time interval than the area determined to be life category II. By estimating the absence of a person at a time interval shorter than the area determined as II, the time required for the presence estimation is set longer, and the time required for the absence estimation is set shorter. Furthermore, as described above, the life division of each region changes depending on the long-term accumulation result, and accordingly, the time required for the presence estimation and the time required for the absence estimation are variably set.

  Further, the rotational speed control of the fan 8 and the wind direction control of the upper and lower blades 12 and the left and right blades are performed according to the air conditioning setting in each of the areas A to I. These controls will be described below.

  Wind direction control during heating is performed by controlling the wind direction in front of the person's feet in the area where it is determined that there is a person, so that warm air reaches the vicinity of the feet, and during air conditioning, the wind direction control is performed above the person's head. By controlling, the cool air reaches above the head. The wind direction is adjusted by the rotational speed of the fan 8 and the angles of the upper and lower blades 12 or the left and right blades.

  FIG. 18 shows the rotation control of the upper and lower blades 12, and when the air conditioner is stopped, as shown in FIG. 18A, the front panel 4, the upper and lower blades 12, and the middle blade 14 are all closed. . In FIG. 18, the description of part of the configuration is omitted for the purpose of explaining the rotation control of the upper and lower blades 12.

  At the time of cooling, in order to make the blown air (cold air) reach above the human head (cooling ceiling airflow), the state shown in FIG. 18 (a) to the state shown in FIG. 18 (b) are passed through FIG. 18 (c). The state shown in is reached. First, the arms 18 and 20 are driven and controlled so that the front panel 4 is separated from the front opening 2 a, and the arms 22 and 24 are driven and controlled so that the upper and lower blades 12 are separated from the outlet 10.

  In the state of FIG. 18C, the air blown out from the blowout port 10 is guided in the horizontal direction by the upper and lower blades 12, but the downstream end of the upper and lower blades 12 is curved upward, so that it is far from the room. Can send air up to. At this time, the upper part of the blower outlet 10, that is, the lower part of the front panel 4 is closed by the middle blade 14, and a part of the air blown out from the blower outlet 10 is not led to the front opening 2 a.

  On the other hand, at the time of heating, in order to make the blown air (warm air) reach the vicinity of the person's feet (heating airflow), the state shown in FIG. 18 (a) to the state shown in FIG. 18 (b) are passed through FIG. The state shown in (d) is reached. In the state of FIG. 18 (d), the air blown out from the outlet 10 is guided obliquely downward by the upper and lower blades 12, but the downstream end of the upper and lower blades 12 is curved toward the main body, so Warm air that tends to accumulate upwards can be sent down the room.

  In addition, FIG.18 (e) is utilized at the time of air conditioning before stabilization, and blowing air is directed to a human body (air flow for human bodies).

FIG. 19 shows the set number of rotations of the fan 8 when air conditioning is performed in each of the areas A to I. A1, A2, and A3 are reference rotations of areas at short distance, medium distance, and long distance from the indoor unit, respectively. A4 is a rotation speed difference due to a difference in region when the distance is the same, and is set as follows, for example.
A1: 800 rpm (during heating), 700 rpm (during cooling)
A2: 1000 rpm (during heating), 900 rpm (during cooling)
A3: 1200rpm (during heating), 1100rpm (during cooling)
A4: 100 rpm (common for cooling and heating)

  Here, the expression “relative position” is introduced as an expression representing the positional relationship with the indoor unit, such as the distance from the indoor unit in each region, the angle from the front of the indoor unit, and the height difference.

  Further, the degree of air conditioning that is easy to air-condition in each region is expressed by an expression of air conditioning requirement level. It is assumed that the higher the air conditioning requirement level, the more difficult the air conditioning is, and the lower the air conditioning requirement level, the easier the air conditioning. For example, as the distance from the indoor unit increases, the blown air is difficult to reach and the air conditioning is difficult to perform. That is, the air conditioning requirement level and the relative position from the indoor unit are closely related, and in this embodiment, the air conditioning requirement level is determined according to the relative position from the indoor unit.

  Therefore, it means that the set rotation speed of the fan 8 in the case of performing air conditioning in each of the areas A to I is set higher as the air conditioning requirement level is higher. That is, as the position of the area to be air-conditioned is farther from the indoor unit, the set rotational speed of the fan 8 is set higher, and when the distance from the indoor unit is the same, the fan 8 is shifted to the left and right from the front of the indoor unit. The set rotation speed is set high. Further, when there is one area to be air-conditioned, it is set to the set rotation speed (air volume) of that area, and when there are a plurality of areas to be air-conditioned, it is set to the set rotation speed of the area where the degree of air conditioning requirement is high.

FIG. 20 shows the setting angles of the upper and lower blades 12 and the left and right blades during heating, and B1, B2, and B3 are reference upper and lower blade angles of a region at a short distance, a medium distance, and a long distance from the indoor unit, respectively. , B4 is the angle difference between the upper and lower blades when the distance is the same, whereas C1 and C2 are the reference left and right blade angles of the left and right regions (the counterclockwise direction is the counterclockwise direction), and C3 and C4 are the differences in the regions The angle difference between the left and right blades is, for example, set as follows. The angle of the upper and lower blades 12 is an angle when measured in the counterclockwise direction with 0 ° when the line connecting the front and rear ends of the blade is horizontal when the blade is convex upward, and this position is the reference. That's it.
B1: 70 °
B2: 55 °
B3: 45 °
B4: 10 °
C1: 0 °
C2: 15 °
C3: 30 °
C4: 45 °

  That is, when heating the area A or B close to the indoor unit, the upper and lower blades 12 are set to a first angle (for example, 70 °), and the rotation speed of the fan 8 is set to the first rotation speed (for example, 70 °). , 800 rpm), and the wind direction is controlled at the edge of the indoor unit side (in front of the person's feet) in the region A or B so that the warm air reaches the vicinity of the feet. In addition, when heating the area C, D, E or F at a medium distance from the indoor unit, the upper and lower blades 12 are set to a second angle (for example, 55 °) smaller than the first angle, The rotation speed of the fan 8 is set to a second rotation speed (for example, 1000 rpm) higher than the first rotation speed, and the wind direction is directed to the edge on the indoor unit side (in front of the human foot) in the region C, D, E, or F. The warm air is made to reach the vicinity of the feet. Furthermore, when heating the area G, H, or I farthest from the indoor unit, the upper and lower blades 12 are set to a third angle (for example, 45 °) smaller than the second angle, and the rotation of the fan 8 is performed. The number is set to a third rotational speed (for example, 1200 rpm) higher than the second rotational speed, and the wind direction is controlled at the edge of the indoor unit side (in front of the human foot) in the region G, H, or I, and in the vicinity of the foot The warm air is made to reach.

FIG. 21 shows the set angles of the upper and lower blades 12 and the left and right blades during cooling in the rising or unstable region, and E1, E2, and E3 are reference points for regions at short distance, medium distance, and long distance from the indoor unit, respectively. The upper and lower blade angles, E4, is the angle difference between the upper and lower blades due to the difference in the area when the distance is the same, while F1 and F2 are the reference left and right blade angles in the left and right regions (counterclockwise is the positive direction), and F3 and F4 Is the angle difference between the left and right blades due to the difference in area, and is set as follows, for example. Note that “rise” refers to the time when the operation of the air conditioner is started, and “unstable region” refers to a state where the current indoor air-conditioning state does not satisfy a set condition (for example, a set temperature).
E1: 50 °
E2: 35 °
E3: 25 °
E4: 10 °
F1: 0 °
F2: 15 °
F3: 25 °
F4: 35 °

FIG. 22 shows the setting angles of the upper and lower blades 12 and the left and right blades during cooling in the stable region, where H1 is a reference upper and lower blade angle in the case of ceiling airflow, and H2 is a reference upper and lower angle in the case of stripping airflow. The blade angle, H3 is the upper limit blade angle difference due to the difference in distance, while I1 and I2 are the reference left and right blade angles in the left and right regions (counterclockwise is the positive direction), and I3 and I4 are the left and right blades due to the difference in regions The angle difference is set as follows, for example. The stable region is a state where the current indoor air conditioning state is a set condition (for example, a set temperature).
H1: 180 °
H2: 190 °
H3: 5 °
I1: 0 °
I2: 15 °
I3: 25 °
I4: 35 °

  Here, as shown in FIG. 18 (c), the ceiling airflow is the airflow when the upper and lower blades 12 are positioned at the lower part of the air outlet 10 and all the blown air is received by the concave surface of the blade and the air is sent out. This means that the upper and lower blades 12 are positioned slightly above the ceiling air flow, and a part (a small amount) of the blowing air is also flowed to the convex surface side of the blade (below the blade). This is the airflow when the wind is sent out in a state where condensation is unlikely to occur.

  When cooling the area A or B close to the indoor unit, the upper and lower blades 12 are set below a predetermined angle (for example, 5 °) from the horizontal, and the rotational speed of the fan 8 is the first rotational speed (when heating) The rotation speed is lower than the first rotation speed and is set to 700 rpm, for example, and is set so that the cold air reaches above the head of the area A or B so that the cool air falls like a shower. Further, when cooling the region C, D, E, or F at a medium distance from the indoor unit, the upper and lower blades 12 are set substantially horizontal, and the rotational speed of the fan 8 is a second higher than the first rotational speed. The rotation speed is set to be lower than the second rotation speed at the time of heating, for example, 900 rpm, and is set so that the cool air reaches above the area C, D, E, or F overhead. Further, when cooling the region G, H, or I farthest from the indoor unit, the upper and lower blades 12 are set upward by a predetermined angle (for example, 5 °) from the horizontal, and the rotation speed of the fan 8 is the second rotation. Is set to a third rotational speed higher than the number (for example, 1100 rpm, which is smaller than the third rotational speed during heating), and is set to allow the cold air to reach above the region G, H, or I overhead. Yes.

  Next, the wind direction control performed according to the number of areas to be air-conditioned will be described with reference to the flowchart of FIG.

  After the operation of the air conditioner is started, the presence / absence determination of a person in the areas A to I is first performed in step S41, and one area determined to have a person in step S42, that is, one area to be air-conditioned. In such a case, in step S43, air conditioning is performed based on the air volume and direction set according to the area. If it is determined in step S42 that there is not one area to be air-conditioned, it is determined in step S44 whether there are two areas to be air-conditioned. If there are two areas to be air-conditioned, the process proceeds to step S45.

In step S45, the air volume is set to the set air volume of the area where the air conditioning requirement is high, and the arrangement mode of the two areas is identified as one of the five modes as shown in FIG. 24, and in the next step S46, Control is performed as shown in Table 6 according to the identified mode.

  Here, mode 1 represents the case of two areas adjacent to each other with a medium distance and the front of the indoor unit, and mode 2 represents the case of two areas adjacent to each other in the front-rear relationship with the angle substantially equal to the indoor unit. Represents. In addition, mode 3 represents the case of two regions where the angle with the indoor unit is substantially the same and is separated in the longitudinal relationship, mode 4 represents the case of two regions where the distance to the indoor unit is substantially the same and the angle is different, Mode 5 represents the case of two regions that are separated, in other words, two regions that are different in distance and angle from the indoor unit.

  The up-and-down wind directions of modes 1 to 4 are fixed to a low demand area during heating, and are fixed to a high demand area during cooling. In addition, the vertical wind direction in mode 5 controls the operation of the upper and lower blades 12 and after stopping for a predetermined time (fixed angle) in the first region of the two regions (first and second regions), The operation of changing the wind direction toward the first region is repeated after changing the wind direction toward the second region and stopping in the second region for a predetermined time. In addition, the stop time of each area | region is each set, for example according to the distance from an indoor unit, and it is preferable to lengthen a stop time, so that the distance from an indoor unit is far.

  The left and right wind directions in mode 1 are fixed at the center of two adjacent areas. In modes 2 and 3, it is assumed that the two areas are in substantially the same direction with different distances when viewed from the indoor unit. The wind direction is fixed in a highly requested area. Further, the left and right wind directions of mode 4 and the mode 5 comprising the arrangement of two spaced apart areas are controlled in the same way as the control of the upper and lower blades 12, and after stopping for a predetermined time in the first area, The operation of changing the wind direction toward the first area is repeated after changing the wind direction toward the second area and stopping in the second area for a predetermined time. The stopping time of each area is set according to the relative position from the indoor unit to each area, for example, the angle from the front of the indoor unit, and it is preferable to increase the stopping time as the angle from the front of the indoor unit increases. .

  If it is determined in step S44 that there are not two areas to be air-conditioned, in step S47, three or more areas to be air-conditioned are selected from the two modes, the normal mode and the special mode, depending on the arrangement. Judgment. Here, the special mode represents the case of a total of three areas, that is, a medium distance and two areas adjacent to each other across the front of the indoor unit, and one area that is a long distance and located in front of the indoor unit. The case of three or more areas excluding is denoted as normal mode. When there are three or more areas to be air-conditioned, the air volume is set to the set air volume in the area with the highest air-conditioning requirement, and in step S47, the special mode (adjacent to the center) shown in FIG. In step S48, the wind direction is set in the same manner as in mode 1 of FIG.

  On the other hand, if it is determined in step S47 that the mode is not the special mode, control in the normal mode shown in FIG. 25 (b) or (c) is performed in step S49, and the vertical wind direction is the region closest to the indoor unit. The angle of the upper and lower blades 12 is changed between the set angle of the upper and lower blades 12 and the set angle of the upper and lower blades 12 in the region farthest from the indoor unit.

  In the normal mode, the left and right wind directions are set to the left end angle and the right end angle at the left and right blade setting angles in the regions at both ends (regions C and I in FIG. 25B and regions C and H in FIG. 25C). Set and stop at the left end angle for a predetermined time, then change the wind direction toward the right end side (swing), stop at the right end angle for a predetermined time and then change the wind direction toward the left end side region (swing) repeat. Note that the operating speed of the left and right blades during the swing is set slower than the operating speed of the left and right blades in the modes 4 and 5 described above. In addition, the stop time at the left end angle or the right end angle is set in accordance with, for example, the angle from the front of the indoor unit, and it is preferable that the stop time is increased as the angle from the front of the indoor unit increases.

  In addition, after each air-conditioning control is performed in step S43, S46, S48 or S49, it returns to step S41.

  Further, when the indoor unit is arranged as shown in FIG. 14, it is determined that the indoor unit is installed in the vicinity of the left side wall using the first to fifth sensors 26, 28, 30, 32, and 34. It is also possible to control the operation of the left and right blades only in the region located on the right side of the left side wall. In this case, the human body detection device including the first to fifth sensors 26, 28, 30, 32, and 34 functions as an automatic installation position recognition unit for the indoor unit.

  It should be noted that at least two sensors may be provided as means for automatically recognizing the installation position of the indoor unit. In the example shown in FIG. 4, the first and second sensors 26 and 28 whose optical axes are on the same plane are provided. To take further explanation.

  When two sensors 26 and 28 are provided, outputs for each cycle T1 from the two sensors 26 and 28 are accumulated for a predetermined time (for example, 3 to 4 hours), and the accumulated reaction result is compared with one threshold value. Thus, the two areas are divided into a living area and a non-living area or two living areas. Note that the threshold value to be compared may be, for example, the second threshold value described above.

  In the example of FIG. 26 in which the indoor unit is installed in the vicinity of the left side wall (for example, within 1 m), area A is determined as a non-living area and area B is determined as a living area, whereas the indoor unit is positioned on the right side wall. When installed in the vicinity (for example, within 1 m), the left area from the front of the indoor unit is determined as the living area, and the right area from the front of the indoor unit is determined as the non-living area. When the indoor unit is installed at the center of the wall, both the left and right areas from the front of the indoor unit are determined to be living areas.

  By automatically recognizing the installation position of the indoor unit in this way, the operation control of the air direction control means in the vertical direction and the wind direction control means in the horizontal direction of the air conditioner can be performed so that air conditioning can be performed only in the living area. Just do it. In the wall-mounted indoor unit of the present embodiment, the operation control of the upper and lower blades and the left and right blades, which are wind direction control means, is performed.

  In addition, when the indoor unit is installed near the side wall, if the curtain is shaken by the wind blown from the outlet 10, the human body detection sensor may mistakenly detect the curtain as a person and the wind may not flow in the direction where the person is present. There are problems such as misjudging that there is a person when there is no person.

  However, the human body detection device configured by the first and second sensors 26 and 28, as shown in FIG. 26, the first sensor 26 detects the presence or absence of a person in the region A, while the second sensor The sensor 28 detects the presence or absence of a person in the region B separated so as not to overlap the region A. Therefore, the areas A and B are separated in the vicinity of the center line located between the optical axis of the first sensor 26 and the optical axis of the second sensor 28. When installed in the machine, the area A and the area B are separated from the front of the indoor unit to the left and right, and based on the results of accumulating the detection responses of the sensors in the areas A and B that do not overlap each other for a predetermined time. It is possible to reliably distinguish between the area and the non-living area. Here, by distinguishing between the living area and the non-living area, when there is a detection reaction of the sensor in the non-living area, the wind direction control is not performed on the non-living area. In other words, in this case, the wind direction is controlled only in the living area. As a result, if there is a person in the living area, even if an irregular reaction such as a curtain swing is detected in the non-living area, it is determined that the reaction is other than a person and the wind direction is set so that the wind does not flow in the non-living area By controlling the above, it is possible to prevent the comfort of the living area where people are present from being impaired. In addition, even when there are no people in the room, even if an irregular response such as a swing of a curtain is detected in a non-living area, it is determined that the response is a non-human response and prevents the erroneous determination that there is a person. be able to.

  Further, the third sensor 32 shown in FIG. 4 is provided in the human body detection device, and is positioned between the optical axis of the first sensor 26 and the optical axis of the second sensor 28 as shown in FIG. It is possible to detect the presence or absence of a person in the area C that straddles both sides of the center line. When it is determined that there is a person in the area C, it can be estimated that there is a person in the right area C2 when viewed from the front of the indoor unit. By adding only one sensor 32, it is possible to determine whether a person is located on the left or right side of the region extending to the left and right.

  In FIG. 28, a human body detection device including six sensors is provided in an indoor unit to divide a human body position determination region into a plurality of regions, and two regions separated adjacently to the left and right as viewed from the front of the indoor unit are divided into two regions. The case where it arranges is shown.

  In the example shown in FIG. 28, the areas A and B or the areas D and E are separated in the left and right directions, and the sensor detection in the areas A and B or the areas D and E that do not overlap each other. The living area and the non-living area can be more reliably distinguished based on the results of accumulating the reactions for a predetermined time.

(Operation control when absence is detected)
Moreover, the indoor unit is provided with a timer, and by using this timer, absence detection energy saving control, forgetting-off prevention control, and various driving operation controls are performed. The operation control when this absence is detected will be described below.

First, energy saving control and forgetting-off prevention control will be described with reference to Table 7 and FIG.

  FIG. 29 shows an example of the temperature shift. Here, a case where the set temperature Tset is 28 ° C. and the target temperature (limit value) is 20 ° C. will be described. ΔT is a temperature difference between the set temperature Tset and the target temperature.

  When the first to fifth sensors 26, 28, 30, 32, and 34 detect that no person is present in all the areas A to I, the timer starts counting, and after the timer starts counting, the time t1 ( For example, when the absence of a person is confirmed at 10 minutes), the set temperature Tset is automatically reduced by 2 ° C. (1 / 4ΔT). Further, when the absence of a person is confirmed at time t2 (for example, 30 minutes after the start of counting), the set temperature Tset is automatically further reduced by 2 ° C. (1 / 4ΔT). Similarly, when the absence of a person is confirmed at time t3 (eg, 1 hour after the start of counting) and time t4 (eg, 2 hours after the start of counting), the set temperature Tset is set to 2 ° C. (1 / 4ΔT), respectively. Reduce automatically.

  At time t4, the total temperature is reduced by 8 ° C. from the set temperature Tset to 20 ° C., which is equal to the target temperature. However, when the absence of a person is still confirmed at time t5, the operation of the air conditioner is stopped to prevent forgetting to turn off the air conditioner.

  When the presence of a person is detected between time t1 and time t5, the temperature is returned to the set temperature Tset before time t1.

  The temperature shift width (reduced temperature) is set as shown in Table 7 according to the temperature difference ΔT between the set temperature Tset and the target temperature, and the temperature shift width is smaller as the temperature difference ΔT is smaller. When the set temperature Tset is lower than the target temperature, the current temperature is maintained. However, when the absence of a person is confirmed at time t5, the operation of the air conditioner is stopped in the same manner as in the example of FIG. is there.

Next, control during cooling will be described with reference to Table 8 and FIG.

  FIG. 30 shows an example of a temperature shift. Here, a case where the set temperature Tset is 20 ° C. and the target temperature (limit value) is 28 ° C. will be described. ΔT is a temperature difference between the set temperature Tset and the target temperature.

  When the first to fifth sensors 26, 28, 30, 32, and 34 detect that no person is present in all the areas A to I, the timer starts counting, and after the timer starts counting, the time t1 ( For example, when the absence of a person is confirmed at 10 minutes, the set temperature Tset is automatically increased by 2 ° C. (1 / 4ΔT). Further, when the absence of a person is confirmed at time t2 (for example, 30 minutes after the start of counting), the set temperature Tset is automatically further increased by 2 ° C. (1 / 4ΔT). Similarly, when the absence of a person is confirmed at time t3 (eg, 1 hour after the start of counting) and time t4 (eg, 2 hours after the start of counting), the set temperature Tset is set to 2 ° C. (1 / 4ΔT), respectively. Increases automatically.

  At time t4, the total temperature is increased by 8 ° C. from the set temperature Tset to 28 ° C., which is equal to the target temperature. However, when the absence of a person is still confirmed at time t5, the operation of the air conditioner is stopped to prevent forgetting to turn off the air conditioner.

  When the presence of a person is detected between time t1 and time t5, the temperature is returned to the set temperature Tset before time t1.

  The temperature shift width (increased temperature) is set as shown in Table 8 according to the temperature difference ΔT between the set temperature Tset and the target temperature. The smaller the temperature difference ΔT, the smaller the temperature shift width. When the set temperature Tset is higher than the target temperature, the current temperature is maintained. However, when the absence of a person is confirmed at time t5, the operation of the air conditioner is stopped in the same manner as in the example of FIG. is there.

  FIG. 31 shows an example in which the power saving operation is achieved by controlling the air volume (rotational speed) of the fan 8 and the capacity of the compressor provided in the outdoor unit.

  That is, when the air volume of the fan 8 is increased, the heat exchange efficiency of the heat exchanger 6 is improved, and when the compressor frequency is the same, the cooling or heating capacity is increased, so that the room temperature is maintained at the same set temperature. Makes it possible to reduce the frequency of the compressor, and the required power consumption is reduced. Further, even when the air volume of the fan 8 is increased in the absence, there is no problem of discomfort due to the air current being too strong and comfort problems due to increased noise of the fan 8.

  As shown in FIG. 31A, when the first to fifth sensors 26, 28, 30, 32, and 34 detect that no person is present in all the areas A to I, the timer starts counting. When the absence of a person is confirmed at time t1 (for example, 10 minutes) after the timer starts counting, the air volume of the fan 8 is increased as shown in FIG. ), The compressor frequency is gradually reduced to time t2 (for example, 30 minutes after the start of counting). After the time t1, the air flow of the fan 8 is kept constant (limit value), and after the time t2, the compressor frequency is kept constant (limit value), but the time t2, time t3 (for example, start of counting) 1 hour), t4 (for example, 2 hours after the start of counting), and t5 (for example, 4 hours after the start of counting), when the absence of a person is continuously confirmed, the air conditioner is operated at time t5. Stop and prevent forgetting to turn off the air conditioner.

  When the presence of a person is detected between time t1 and time t5, the setting air volume and the setting frequency before time t1 are restored.

  In addition, in all of the examples of FIG. 29 to FIG. 31 described above, when there is no person for a predetermined time during normal operation, the power saving operation is performed with less power consumption than during normal operation. If there is no air conditioner, the operation of the air conditioner is stopped to achieve energy saving (“normal operation” is “operation instructed by the user”).

  In addition, even if the absence continues for a long time, if the human body sensor misdetects a disturbance other than a person such as a curtain that may cause a temperature change, normal operation will continue in the absence (unmanned) state forever Since it is also possible to continue, when a predetermined time t6 (for example, 24 hours) longer than the time t5 has elapsed, the operation is stopped and the forgetting to cut can be surely prevented. Moreover, it is preferable to make an audible or visual notification to the main body or the remote controller by voice or an LED lamp or to display characters on the screen immediately before the stop of the operation after the elapse of a predetermined time t6 longer than the time t5 or the time t5. Furthermore, if the remote control or the like is provided with automatic stop selection means that can select whether or not to perform automatic operation stop after elapse of a predetermined time t6 that is longer than time t5 or time t5, the usability is improved.

  If the above-described absence detection energy saving control and forgetting prevention control are air conditioners provided with at least one human body detection sensor in the indoor unit, absence detection energy saving control and forgetting prevention control are performed according to the output from one human body detection sensor. It can be performed.

(Various functional operation control)
Next, when it is detected by the timer provided in the indoor unit that no human is present in all areas, the following various functional operation control operations are performed. In the air conditioner according to the present embodiment, various functional operation controls include filter cleaning, indoor heat exchanger drying operation, ventilation operation with improved performance than during normal operation, and air purification operation with improved performance than during normal operation. Each control of the oxygen-enriched operation whose capacity is improved from that during normal operation.

  These various functional operation controls may be executed in combination with the energy saving control and the forgetting control described above. For example, when a predetermined time when the absence of a person is detected is detected, the above-described energy saving control is executed, and when the absence of a person is confirmed in time (for example, about 5 minutes after the start of counting), Perform functional operation control. Further, when the absence of a person is confirmed in a predetermined time (for example, about 30 minutes after the start of counting), the above-described energy saving control and forgetting-off control may be executed.

  The various functional operation controls may be independently performed without being combined with the energy saving control. The above-described various functional operation controls involve operations that cannot be performed in a state where there is a loud noise during operation or a person is present, and it is preferable to perform the operation when no human being is detected. That is, the above-described functional driving generates a large amount of sound, and the user is not made to hear noise by performing driving or performance-enhancing driving when no one is present. In particular, since the filter cleaning and the drying operation of the indoor heat exchanger are performed after the normal operation of the air conditioner is stopped, the operation is performed when the person is absent, so that the user does not feel uncomfortable. .

  Specifically, when a predetermined period of time when the absence of a person is detected is detected, the ventilation operation is improved in performance compared to normal operation, the air purification operation is improved in performance from normal operation, and the capability is improved from that in normal operation. When the absence of a person is confirmed in time (for example, about 15 minutes after the start of counting), at least one of the above-described operation controls is performed. Of course, at this time, the operation control capable of simultaneous operation may be performed simultaneously, or the operation control may be performed by sequentially switching each time a predetermined time elapses or one operation ends. The order of operation control at this time is not particularly limited.

  For example, a dirt sensor and an oxygen concentration detection sensor (not shown) may be used as a reference for selecting a functional operation performed when no person is detected. For example, control is performed so that the air cleaning operation is performed according to the degree of dirt in the room calculated from the dirt sensor value detected by the dirt sensor and the dirt detection duration, and the indoor time calculated from the passage of a predetermined time or the dirt sensor value. When the outside of the dirty tool falls within the predetermined range, the air cleaning operation is stopped.

  Further, for example, when the oxygen concentration detected by the oxygen concentration detection sensor is within a preset oxygen enrichment region, the oxygen enrichment operation or the ventilation operation is performed, while the oxygen concentration detected by the sensor is the oxygen enrichment operation. When it is outside the control region, control is performed so as to stop the oxygen enrichment operation. Note that, instead of using the oxygen concentration detection sensor, a carbon dioxide concentration detection sensor can be used, and the oxygen concentration can be used as an index based on the detected carbon dioxide concentration.

  In addition, when the presence of a person is detected during execution of these various functional operation controls, these operations are stopped and the normal operation is resumed.

  Then, when the absence of a person is confirmed for a predetermined time (for example, about 30 minutes after the start of counting), the normal operation of the air conditioner is stopped, and the filter cleaning and the indoor heat exchanger drying operation are executed. The normal operation may be stopped after finishing the filter cleaning and the drying operation of the indoor heat exchanger.

  Hereinafter, a specific configuration and operation for performing each functional operation control will be described.

(Filter cleaning operation)
FIG. 32 is a diagram illustrating a configuration of the filter device of the air conditioner of FIG. 1. As shown in FIG. 32, the filter device 40 that removes dust from the air passing through the heat exchanger 6 includes a filter frame 54, a filter mesh 55 that holds the filter frame 54, and the surface of the filter mesh 55. And a slidable suction nozzle 56. Further, the filter frame 54, the filter net 55, and the like are bent, and the upper part is configured in the horizontal direction and the lower part is configured in the vertical direction. The suction nozzle 56 can be smoothly moved to the left and right with a very narrow gap from the filter mesh 55 by a pair of guide rails 54a installed at the upper and lower ends of the filter frame 54. Dust adhering to the filter mesh 55 Suction is performed by the suction nozzle 56. Further, one end of a suction duct 57 is connected to the suction nozzle 56, and the other end of the suction duct 57 is connected to a suction device 58. The suction device 58 is a device using a fan motor capable of adjusting the rotation speed so that the suction amount can be varied. The suction duct 57 is formed of a duct that can be bent so as not to interfere with the movement of the suction nozzle 56. Further, an exhaust duct 59 is connected to the suction device 58 and is routed outside the room. Dust adhering to the filter net 55 and sucked by the suction nozzle 56 is discharged to the outside through the suction duct 57, the suction device 58, and the exhaust duct 59.

Next, the suction nozzle 56 will be described with reference to FIGS. 33 to 35.
FIG. 33 is a view of the suction nozzle 56 as viewed obliquely from above. As shown in FIG. 33, the suction nozzle 56 surrounds the nozzle body 62 serving as a flow path for the sucked air and the nozzle body 62. A belt 63 having a width of 20 mm is provided. A slit-like nozzle opening 62a having a length of 320 mm (corresponding to a vertical length of the filter net 55) and a width of 3 mm is formed on the surface of the nozzle body 62 on the filter net 55 side. On the other hand, the belt 63 is formed in a loop shape, and is wound around the outer periphery of the nozzle body 62 so as to cover the nozzle opening 62a. The belt 63 is provided with a suction hole 63a having a length of 80 mm (1/4 of the vertical length of the filter screen 55) and a width of 2 mm, and the position of the suction hole 63a is directly above the nozzle opening 62a. Is attached. An instruction unit 67 is provided on the side surface of the suction hole 63a in order to detect the position. A suction hole sensor 28 is provided inside the suction nozzle 56 so as to come into contact with the instruction portion 67, and the position of the instruction portion 67 can always be detected to detect the position of the suction hole 63a. Yes. Both ends of the belt 63 are provided with equally spaced drive holes 64 like a movie film, and a gear 66 attached to a stepping motor 65 fixed on the nozzle body 62 is engaged with the drive holes 64. Thus, the belt 63 can be freely driven in any of the vertical directions.

  34 is a view showing the nozzle main body 62 and the belt 63 separately in FIG. 33, and FIG. 5 is a cross-sectional view of the suction nozzle 56 (cross-sectional view along line VV in FIG. 33).

  As another configuration for driving the belt in the suction nozzle 56 having such a configuration, a method of driving the belt 63 with a rubber roller or the like without using the gear 66 may be considered. Further, in the embodiment of the present invention, the belt 63 is formed in a loop shape in order to reduce the size of the apparatus. However, there is a method of winding the belt by providing a reel or the like.

  In the present embodiment, since the entire surface of the filter screen 55 is suction-cleaned by the suction nozzle 56 having the above-described configuration, the specific operation will be described with reference to FIGS. 32 and 36 to 38.

  FIG. 36 is a view showing the positions of the suction holes 63a corresponding to the cleaning ranges A, B, C, and D of the filter net 55 shown in FIG. The actual suction nozzle 56 has a structure bent along the filter mesh 55 as shown in FIG. 32, but in FIG. 36, the suction nozzle 56 is shown in a straightened state for easy viewing. .

  First, when the area A of the filter mesh 55 in FIG. 32 is suction-cleaned, the belt 63 is driven to fix the suction hole 63a at the position A as shown in FIG. As shown in FIG. 37, by driving the suction nozzle 56 from the right end to the left end of the filter mesh 55 while suctioning in this state, the horizontal range A of the filter mesh 55 can be suction-cleaned.

  Next, in order to shift to suction cleaning in the range B of the filter mesh 55 in FIG. 32, the belt 63 is driven to fix the suction hole 63a to the position B shown in FIG. Similarly, by driving the suction nozzle 56 from the left end to the right end of the filter mesh 55 while suctioning in this state, the horizontal range B of the filter mesh 55 in FIG. 32 can be suction-cleaned. Similarly, the range of C and D of the filter screen 55 in FIG. 32 can be suction-cleaned. Since the ranges C and D of the filter network 55 in FIG. 32 are provided in the horizontal direction, the amount of dust attached is larger than the range A and B, and a larger amount of suction is required. FIG. 37 and FIG. 38 are diagrams showing the order of this suction cleaning with arrows, but the range of A and B of the filter mesh 55 in FIG. 32 is suctioned by one horizontal row as shown in FIG. Cleaning is performed by moving the nozzle 56 horizontally only in one direction, and the range of C and D of the filter network 55 in FIG. 32 is horizontally moved in one row in the horizontal direction as shown in FIG. (Reciprocating) to clean. By performing such a horizontal sweep suction operation, the entire surface of the filter screen 55 can be cleaned substantially uniformly.

  As shown in FIG. 32, limit switches 60 and 61 are provided on both sides of the filter frame 54, and the suction nozzle 56 contacts the limit switch 60 and 61 so that the suction nozzle 56 is horizontal. Move back and forth in the direction.

  According to the present embodiment, the position of the suction hole 63a can be detected, and when the position of the suction hole 63a is above the filter net 55, the suction nozzle 56 is driven to reciprocate to increase the number of suctions. Can be prevented from remaining. That is, the entire surface of the filter screen 55 can be cleaned substantially uniformly by changing the cleaning ability of the suction nozzle 56 in accordance with the position of the suction hole 63a detected by the suction hole sensor 28 as the position detection means.

  Further, when the position of the suction hole 63a is above the filter net 55, it is possible to prevent the dust from remaining by increasing the output of the suction device 58 and increasing the suction amount. In this case, the suction nozzle 56 performs cleaning as shown in FIG.

  Furthermore, when the position of the suction hole 63a is above the filter net 55, it is possible to prevent the dust from remaining by reducing the horizontal driving speed of the suction nozzle 56 and extending the suction time.

  As shown in FIG. 39, the nozzle body 62 is provided with a dust sensor 40 for detecting the amount of dust adhering to the surface of the filter net 55, and the portion where the amount of dust detected by the dust sensor 40 is large is the suction hole sensor. After the suction hole 63a detected by 28 is aligned with the portion, suction is performed by locally increasing the output of the suction device 58 to increase the suction amount or locally reducing the horizontal driving speed of the suction nozzle. Remaining dust can be prevented by lengthening the time. That is, the entire surface of the filter net 55 can be cleaned substantially uniformly by changing the cleaning capability of the suction nozzle 56 in accordance with the amount of dust attached detected by the dust sensor 40 as the dust detector.

(Ventilation operation)
FIG. 39 shows the structure of the suction device 58 provided in the filter device 40 of the air conditioner. Since the suction device 58 has a configuration described later, it also functions as a ventilation unit for ventilation operation. In the ventilation operation, by adjusting the rotation speed of the sirocco fan 101, the capacity can be adjusted by changing the ventilation air volume. For example, the capacity is improved (for example, 20%) compared to the normal time. Ventilation can be performed. Further, the normal ventilation operation does not need to be performed through the opening 102, and may be performed through the nozzle opening 62a of the suction nozzle 56, for example.

  As shown in FIG. 39, the suction device main body 58 incorporates a sirocco fan 101, and exerts a suction force by rotating the sirocco fan 101 at a high speed with a motor. A suction duct 60 is connected to the suction side of the suction device main body 58, and an exhaust duct 59 is connected to the exhaust side. Further, an opening 102 is formed on the suction side of the suction device main body 58, and an opening / closing plate 104 connected to a stepping motor 103 is swingably attached to one side of the opening 102. When the opening / closing plate 104 is driven by the stepping motor 103, the opening 102 opens and closes. A sealing material 105 is affixed to the surface of the opening / closing plate 104 on the opening 102 side. When the opening 102 is closed by the opening / closing plate 104, the opening / closing plate 104 comes into close contact with the periphery of the opening 102.

  The operation and action of the filter device configured as described above will be described below with reference to FIGS. 32 and 40.

  The amount of air that can be sucked by the suction device 58 is determined by the total ventilation resistance of each path from suction to exhaust. Therefore, the smaller the total ventilation resistance, the larger the suction air volume. From this viewpoint, reducing the ventilation resistance of the exhaust duct 59, that is, increasing the cross-sectional area of the ventilation duct 59 leads to an increase in suction force during suction cleaning and ventilation operation. However, if the cross-sectional area of the ventilation duct 59 is too large, dust accumulated inside the suction nozzle 56 and the suction duct 59 after the suction cleaning may accumulate again in the exhaust duct 59. In addition, dust accumulation on the casing of the suction device main body 58 and adhesion of dust to the blade (blade) of the sirocco fan 101 also occur.

  Therefore, when the opening 102 and the opening / closing plate 104 are provided in the suction device 58 and the opening 102 is opened, almost all of the suction air is sucked from the opening 102. Since the area of the opening 102 can be much larger than the opening area of the nozzle opening 62a of the suction nozzle 56 (since the suction device 58 is larger than the suction nozzle 56), the wind speed of the wind sucked from the suction hole 63a is slow. The ventilation resistance of the suction device 58 is very low. Furthermore, since no wind flows through the suction nozzle 56 and the suction duct 57, the suction hole ventilation resistance, the suction nozzle ventilation resistance, and the suction duct ventilation resistance are zero. Therefore, the total ventilation resistance becomes a value close to only the ventilation resistance of the exhaust duct 59 and can be very low. As a result, even if the rotation speed of the sirocco fan 101 is the same as that during suction cleaning, the amount of air flowing through the suction device 56 and the exhaust duct 59 can be significantly increased. Since the air volume at this time is also an air volume that can be ventilated in a normal house, the indoor air can be discharged to the outside, that is, the ventilation operation can be performed with improved performance compared to the normal time. At this time, the amount of air flowing through the suction device 56 and the exhaust duct 59 can be remarkably increased, so that dust adhering to the blade of the sirocco fan 101 can be blown away, and the sirocco fan 101 is not clogged with dust.

  When the opening / closing plate 104 is driven to open the opening 102, the suction device 58 is used as a ventilation fan. When suction cleaning is performed, the opening 102 is closed and the suction fan sucks dust from the suction hole 30 of the suction nozzle 14. A suction device 58 can be used. That is, the same suction device 58 can realize the suction cleaning function and the ventilation function.

  By the way, it is considered that some dust adheres to the periphery of the opening 102 and does not close completely, causing suction leakage and lowering the suction cleaning performance. Therefore, the surface of the opening / closing plate 104 is deformed flexibly. In addition, the sealing material 103 with little permanent deformation is stuck to prevent suction leakage. As the sealing material 103, a flexible foam material such as EPT (ethylene propylene rubber) can be used, but a gel material having a strong resistance to compressive deformation may be used.

  39 and 40 show the open state and the closed state of the opening 102, respectively. The white arrow in FIG. 39 represents the sucked wind, and the white arrow in FIG. 40 represents the sucked wind as well. .

  The fan used in the suction device 58 may be a sirocco fan, a turbo fan, or the like. However, when a ventilation function is required, it is preferable to use a sirocco fan with a large air volume. If the ventilation function is not required, the turbofan may provide stronger suction.

(Air cleaning operation)
In the filter device 40 shown in FIG. 32, the high-voltage conductive wire is arranged so as to be routed over the entire surface, and by adjusting the voltage applied to the infection, the performance is improved from the normal time and the normal time. Air cleaning operation can be performed. In the present embodiment, a voltage of +3 kV is applied to the high-voltage conductive line during normal times, and a voltage of +6 kV is applied during air cleaning operation with improved performance. That is, the filter device 40 can improve the dust collection efficiency by charging the adsorption filter and improving the capacity of the adsorption unit, and can adjust the voltage applied to the high-voltage conductive wire to thereby clean the air. The driving ability can be adjusted.

  Further, the ability of the air cleaning operation can be adjusted by adjusting the rotational speed of the fan 8. For example, by increasing the amount of air blown into the room, for example, by increasing the number of rotations of the fan 8, it is possible to perform an air cleaning operation with improved performance compared to normal times. In the present embodiment, the fan rotation speed is set to 900 to 1200 rpm during normal operation, and the fan rotation speed may be set to 1500 rpm, for example, when the air cleaner with improved performance is operated.

(Oxygen gas enrichment operation)
As described above, the air conditioner according to the present embodiment includes a gas enrichment unit 46 including an oxygen enrichment membrane that is a selective gas permeable membrane, and a gas enrichment as a configuration for performing an oxygen gas enrichment operation. A decompression pump 47 that decompresses the secondary side of the unit 46, an oxygen supply main pipe 48 that connects the gas enrichment unit 46 and the decompression pump 47 in a breathable manner, and a discharge main pipe 49 that is connected to the discharge side of the decompression pump 47. I have.

  The blower pipe 40 is a pipe that connects the discharge main pipe 49 and the discharge port 42, and is led out from the outdoor unit 1 and introduced into the indoor unit 2. A part of the air duct 53 has a trap structure 53a. Note that a fan (not shown) for scavenging stagnant nitrogen-enriched air is disposed on the primary side (atmosphere side) of the gas enrichment unit 46 so that the oxygen gas enrichment apparatus can be operated and operated. It is good to operate in conjunction with ability.

  Note that the gas enrichment unit 46 is arranged in a blower circuit having the fan 45 of the outdoor unit 1, and the nitrogen enriched air on the primary side of the gas enrichment unit 46 is scavenged by the blower of the fan 45. Good. Further, the gas enrichment unit 46, the decompression pump 47, the oxygen supply main pipe 48, and the discharge main pipe 49 may be configured as independent units and attached to the frame of the outdoor unit 1.

  When the discharge port 42 is disposed in the housing of the indoor unit 2 or in the vicinity thereof and is disposed in the blower circuit in the indoor unit 2, oxygen-enriched air is blown into the blown air blown by the operation of the fan 8. It is added and sent out from the outlet to the indoor space. Moreover, it is preferable that the discharge port 42 has a pipe expansion part in the vicinity, and the structure which made the discharge port 42 the pipe expansion part in the present Example is shown. By providing the expanded tube portion in this manner, melting and evaporation can be promoted by receiving the expanded ice portion and condensed water from the discharge port 42 once without being scattered from the discharge port 42. In addition, as shown in a present Example, scattering of condensed water etc. can also be prevented by providing the discharge port 42 above the heat exchanger 6 in the upstream of the wind circuit of the heat exchanger 6. FIG.

  In the oxygen gas enrichment operation, when the decompression pump 47 is operated, the air that has passed through the oxygen enrichment film in the gas enrichment unit 46 passes through the oxygen supply main pipe 48 and is sucked into the decompression pump 47, and is enriched with oxygen. The converted air sequentially passes through the discharge main pipe 49 and the blower pipe 40 and is sent out from the discharge port 42 into the indoor unit 2. By adjusting the capacity of the decompression pump 47, the capacity of the oxygen gas enrichment operation can be adjusted. Specifically, when the capacity is improved, the capacity of the decompression pump 47 may be improved by about 20%. Further, the capacity of a fan (not shown) for scavenging stagnant nitrogen-enriched air can also be operated in conjunction with the operating capacity of oxygen gas enrichment.

(Dry operation)
FIG. 42 is a refrigeration cycle diagram of the air-conditioning apparatus of the present embodiment. As shown in the figure, the compressor C, the four-way valve 69, the outdoor heat exchanger 80A, the expansion device 93, and the indoor heat exchanger 80B are connected in an annular shape through pipes. Here, the compressor C, the four-way valve 69, the outdoor heat exchanger 80A, and the expansion device 93 are provided in the outdoor unit 1, and the indoor heat exchanger 80B is provided in the indoor unit 2. The outdoor unit 1 and the indoor unit 2 are connected by a liquid side connection pipe 90 and a gas side connection pipe 81. The liquid side connection pipe 90 is connected by a liquid side outdoor valve 81 and a liquid side indoor valve 82, and the gas side connection pipe 81 is connected by a gas side outdoor valve 88 and a gas side indoor valve 89. The pipes constituting the refrigeration cycle are a pipe 71 connecting the compressor C and the four-way valve 69, a pipe 72 connecting the four-way valve 69 and the outdoor heat exchanger 80A, the outdoor heat exchanger 80A and the expansion device 93. A pipe 91 for connecting the expansion device 93 and the liquid side outdoor valve 81, a pipe 93 for connecting the liquid side indoor valve 82 and the indoor heat exchanger 80B, an indoor heat exchanger 80B and a gas side indoor valve 89. A pipe 73 to be connected, a pipe 85 to connect the gas side outdoor valve 88 and the four-way valve 69, and a pipe 86 to connect the four-way valve 69 and the compressor C are configured. Here, the pipes 91, 92, 93 having a large proportion of the liquid state are liquid side pipes, and the pipes 82, 83, 84, 85, 86 having a large proportion of the gas state are gas side pipes. The selective switching between the cooling operation and the heating operation is performed by switching the four-way valve 69 to change the refrigerant flow. In the figure, arrows indicated by solid lines indicate the direction of refrigerant flow during cooling operation, and arrows indicated by broken lines indicate the direction of refrigerant flow during heating operation.

  The drying operation is a heating operation for drying the heat exchanger 6 in which condensation or the like has occurred due to the cooling operation of the air conditioner, and is performed by switching the four-way valve 69 during the drying operation. That is, once the compressor C is stopped, the four-way valve 69 is switched to operate in the heating operation cycle, the temperature of the indoor heat exchanger 6 is increased, and water is retained in the indoor heat exchanger 6 during cooling, cooling operation, or dehumidifying operation. Evaporate the water. In addition, for example, by combining air blowing, cycle dehumidification, and heating operation, such as first air blowing, then cycle dehumidification, and further heating operation, switching to sequential operation and drying the indoor heat exchanger, steam generation and heat exchanger You may make it carry out, suppressing the dew condensation in parts other than.

  Since the air conditioner according to the present embodiment can perform each of the above-described operation controls when a person is not detected by the sensor, by performing the operation with improved ability to increase sound generation when the person is absent. , Do not let the user hear the noise. In particular, the filter cleaning and the drying operation of the indoor heat exchanger are performed while the normal operation of the air conditioner is stopped, so that the user does not feel uncomfortable by performing the operation in the absence of a person.

  It is to be noted that, by appropriately combining arbitrary embodiments of the various embodiments described above, the effects possessed by them can be produced. In addition, the present invention is not limited to the above embodiment, and can be implemented in various other modes. For example, the sensor unit for detecting the presence of a person may have one sensor.

  Since the air conditioner according to the present invention automatically performs energy-saving operation, operation with improved ability to generate noise, and operation that cannot be performed without human beings when there is no person, for example, for home use It is useful as an air conditioner.

The indoor unit of the air conditioner concerning this invention is shown, (a) is a front view, (b) is a front view of the state which removed the cover of the human body detection apparatus provided in the upper part, (c) is a side view. FIG. 1B shows the indoor unit in FIG. 1B with the front panel opening the front opening, where FIG. 1A is a perspective view and FIG. 1B is a side view. 1 is a longitudinal sectional view of the indoor unit of FIG. The figure which shows the connection relation of the air conditioner of FIG. The human body detection apparatus is shown, (a) is a front view, (b) is a side view, (c) is a perspective view. Schematic showing the change of the visual field range based on the change of the mounting position of the human body detection device Side view of an indoor unit when a sensor unit constituting a human body detection device is provided on the surface of an arbitrary sphere Side view of an indoor unit when an arbitrary sphere is cut off at an arbitrary plane and a sensor unit is provided at the intersection of this plane and the optical axis of the sensor unit Front view of the sensor unit of FIG. Schematic showing the human body position determination area detected by each sensor unit provided in the human body detection device Schematic of area division detected by three sensor units Flowchart for setting region characteristics for each region shown in FIG. The flowchart which finally determines the presence or absence of a person in each area | region shown by FIG. Timing chart showing the presence / absence determination of people by each sensor unit Schematic plan view of a residence where the indoor unit of FIG. 1 is installed The graph which shows the long-term accumulation result of each sensor unit in the residence of FIG. Schematic plan view of another residence where the indoor unit of FIG. 1 is installed The graph which shows the long-term accumulation result of each sensor unit in the residence of FIG. The longitudinal cross-sectional view of the indoor unit which shows the operating state of the up-and-down blade provided in the indoor unit of FIG. Schematic showing the set number of rotations of the fan when air-conditioning each area shown in FIG. 9 Schematic showing the set angles of the upper and lower blades and the left and right blades when heating each area shown in FIG. Schematic showing the set angles of the upper and lower blades and the left and right blades when standing up or unstable when cooling each region shown in FIG. Schematic showing the set angles of the upper and lower blades and the left and right blades at the time of cooling when cooling each region shown in FIG. Flow chart showing wind direction control performed according to the number of areas to be air-conditioned Schematic showing the arrangement mode when air-conditioning two areas Schematic showing the arrangement mode when air-conditioning three areas Schematic view of the room showing how to determine living and non-living areas when the indoor unit is installed near the left side wall Schematic diagram of the room showing another method for determining the living area and the non-living area when the indoor unit is installed near the left side wall Schematic diagram of the room showing still another method for determining the living area and the non-living area when the indoor unit is installed near the left side wall Timing chart showing temperature control during heating Timing chart showing temperature control during cooling Timing chart for achieving power-saving operation by controlling the fan air volume and the capacity of the compressor installed in the outdoor unit The perspective view of the filter apparatus provided in the indoor unit of FIG. The perspective view of the suction nozzle provided in the filter apparatus of FIG. FIG. 33 is an exploded perspective view of the suction nozzle of FIG. Sectional drawing along line VV in FIG. It is a schematic diagram which shows the position of the suction hole according to the cleaning range of a filter net | network, (a) is the position of the suction hole when cleaning the range A, (b) is the suction hole when cleaning the range B. (C) shows the position of the suction hole when the range C is cleaned, and (d) shows the position of the suction hole when the range D is cleaned. Schematic diagram showing the suction cleaning sequence of the filter device Another schematic diagram showing the suction cleaning sequence of the filter device It is sectional drawing along line VV in FIG. 33, and has shown the modification of especially a suction nozzle. The schematic diagram which shows the structural example of the suction device which has an opening part in an open state The schematic diagram which shows the structural example of the suction device which has an opening part in a closed state Refrigeration cycle diagram of the air conditioner of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Outdoor unit 2 Indoor unit 2a Front opening part 2b Upper surface opening part 4 Movable front panel 5 Cover 6 Heat exchanger 8 Fan 10 Outlet 12 Upper and lower blades 14 Middle blades 16 Middle blade drive mechanism 18, 20, 22, 24 Arm 26, 28, 30, 32, 34 Sensor unit 26a, 28a, 30a, 32a, 34a Circuit board 26b, 28b, 30b, 32b, 34b Lens 36 Sensor holder

Claims (4)

An air conditioner that controls the operation by detecting the presence or absence of a person with a human body detection sensor provided in the indoor unit,
During normal operation, when the absence of a person is detected by the human body detection sensor for a first predetermined time, a power-saving operation with less power consumption than during normal operation is performed, and a second predetermined time longer than the first predetermined time. When the absence of a person is confirmed by the human body detection sensor for a period of time, cleaning of the filter, drying operation of the indoor heat exchanger, ventilation operation with improved performance compared to normal operation, air purification with improved performance than normal operation An air conditioner that performs at least one of an oxygen enrichment operation in which the capacity is improved from that during normal operation.   When the presence of a person is detected by the human body detection sensor during each operation of the ventilation operation, the air purification operation, or the oxygen-enriched operation whose performance has been improved from the normal operation, the normal operation state is restored. The air conditioner according to claim 1, wherein A sensor capable of detecting oxygen concentration;
When the oxygen concentration detected by the sensor is within a preset oxygen enrichment region, the oxygen enrichment operation is performed, while when the oxygen concentration detected by the sensor is outside the oxygen enrichment region, the oxygen enrichment operation is performed. The air conditioner according to claim 1, wherein the air conditioner is controlled to stop the enrichment operation. A dirt detection sensor capable of detecting air cleanliness,
When the air cleanliness detected by the sensor falls within a preset air cleanliness region, the air cleanup operation is performed. On the other hand, when the air cleanliness detected by the sensor falls outside the air cleanliness, the air cleanliness The air conditioner according to any one of claims 1 to 3, wherein the air conditioner is controlled to stop operation.

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