JPH0727027B2 - Human body position detecting device and air conditioner including the device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention utilizes a human body position detecting device for detecting the human body position by detecting the amount of infrared light in a specific area of a detection area, and the device. The present invention relates to an air conditioner for improving the air conditioning effect.

(Prior Art) Conventionally, for example, as disclosed in “Transistor Technology Separate Volume Sensor / Interfacing No. 1, pages 170 to 179”, an infrared sensor installed in a detection area and infrared rays from the detection area are detected on the infrared sensor. It is equipped with a condensing system that uses a reflecting mirror or lens that condenses light on the body, and a signal processing circuit that determines the presence or absence of the human body based on the amount of infrared light detected by an infrared sensor. It is known to detect the presence of a human body in the area.

Further, as disclosed in, for example, Japanese Patent Application Laid-Open No. 60-178374, when the presence of a human body is detected while monitoring the presence of an object such as a human body with a sensor such as an infrared sensor, the object is tracked. However, an object detection device that detects the size and position of an object by scanning the vicinity of the object is a known technique.

(Problems to be Solved by the Invention) By the way, there is a case where it is desired to automatically detect whether or not a human body exists in a specific place in the detection area.
Therefore, by using the above-mentioned conventional one, the detection area is divided into a plurality of partial areas, and the detection of the change in the amount of infrared light for each partial area is performed by scanning over the entire detection area. The presence of the human body in can be detected.

However, in that case, it is necessary to perform scanning a number of times corresponding to the number of each partial area, which causes a problem that it takes a long time to detect the human body position.

On the other hand, as in the technique of the above publication, after the human body is discovered, the human body is tracked and only the vicinity thereof is scanned, whereby the number of times for detecting the human body can be reduced. In some cases, tracking may not be possible. That is, there is a limit to the moving speed of the human body that can be tracked due to the detection sensitivity of the infrared sensor, the inertia of the entire detection device, the ability of the motor, and the like. If it is attempted to expand the function as much as possible beyond this limit, enormous cost will be required, and it will be difficult to apply to general-purpose equipment such as an air conditioner, regardless of the special application field regardless of the cost. Therefore, in general, a device equipped with such a tracking function, for example, an air conditioner is limited to a field in which a person moves slowly in an extremely narrow area.

The present invention has been made in view of the above circumstances, and an object thereof is a human body position detection device capable of detecting the presence of a human body within a detection area with a small number of scans, no matter how fast the movement speed of the human body is. To provide.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the first means for solving the problem is to individually detect the presence of a human body as a human body position detecting device as shown in FIG. 1 (not including a broken line portion). a partial detection area for detecting (a ₁₎ ~ infrared detecting means (4) for detecting the amount of infrared rays divided detection area in (B ₇₎ (1a), an infrared ray from the detection area (1) in Infrared ray focusing means (6) for focusing on the infrared ray amount detecting means (4), and a human body detecting means for detecting the presence or absence of a human body based on a change in the infrared ray amount detected by the infrared ray amount detecting means (4). (12) and a scanning means (20) for scanning so that the infrared light collection range of the infrared quantity collection means (6) changes within the detection area (1a).

Then, receiving the output of the human body detecting means (12), based on the number of times of human body detection, the area setting for setting the priority order for scanning the partial areas (A ₁ ) to (B ₇ ) in descending order of human body detection frequency The scanning area of the means (21) and the scanning means (20) is a detection area (1a) for a predetermined time after the start of human body detection.
A human body detection control means (22) for controlling the scanning means (20) so that the scanning means (20) is moved so as to be evenly distributed over the entire area and thereafter, in accordance with the priority order set by the area setting means (21). Is.

The second solving means is provided with a human body position detecting device having the same configuration as the first solving means as shown in FIG. 1 (including a broken line portion).

Then, the air conditioner receives the output of the human body detecting means (12) of the human body position detecting device so that the wind direction of the conditioned air is directed to the partial areas (A ₁ ) to (B ₇ ) where human body detection frequency is high. The wind direction control means (23) for controlling the inclinations of the vertical louver and the horizontal louver is provided in the.

(Operation) With the above configuration, in the invention of claim (1), the partial area where the infrared light is collected by the infrared light collecting means (6) by the scanning means (20) on the infrared amount detecting means (4) ( A ₁ ) ~
(B ₇ ) is scanned so as to change in the detection area (1a), and the infrared rays from the partial areas (A ₁ ) to (B ₇ ) of the detection area (1a) are transmitted to the infrared amount detection means (4). When entering the light,
When human whole or in part out from each part area (A ₁₎ ~ enters (B ₇₎ or a partial area _{(A 1) ~ (B 7} ), infrared rays condensed on the infrared detecting means (4) Changes the amount of light, and the human body detecting means (12) detects the presence of the human body based on the change in the amount of light.

In that case, the human body detection control means (22) controls the scanning area of the scanning means (20) so as to cover the entire detection area (1a) for a predetermined time after the start of human body detection, and the area setting means (21). As a result of a type of learning, the human body detection results in a location where the human body detection frequency is high in the priority detection area
x) ~ (AR-kmin). Then, thereafter, the human body detection control means (22) controls the scanning means (20) so that the scanning area is limited to the priority detection areas (AR-kmax) to (AR-kmin). There is no need to perform human body detection on the partial areas (A ₁ ) to (B ₇ ). Moreover, it is not necessary to track the position of the human body, and a partial area having a high human body existence probability in the environment is specified by a kind of learning effect. Therefore, no matter how fast the moving speed of the human body is, the position of the human body can be detected rapidly with high probability.

Further, in the invention of claim (2), the human body detecting means (1
In response to the signal of 2), the wind direction control means (23) supplies vertical and horizontal louvers so that the conditioned air is supplied to the partial areas (A ₁ ) to (B ₇ ) in which the presence of the human body is detected. The tilt of is controlled. That is, in response to the rapid detection of the human body position by the human body position detecting device, the place where the human body is present is predominantly air-conditioned, and a comfortable air-conditioning effect is exerted.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings starting from FIG.

FIG. 2 shows an installation state of a human body position detecting device attached to an air conditioner according to an embodiment of the present invention, (1) is a rectangular parallelepiped indoor space, and a longitudinal direction of the indoor space (1) ( Hereinafter, a human body position detection device for detecting the human body position in the indoor space (1) is attached to a side wall on the entrance side that partitions the vertical direction).

As shown in FIG. 4, the human body position detecting device is provided with a single detecting mechanism (2) and a shielding part (3) for shielding the entire surface of the detecting mechanism (2). . As shown in FIG. 5, the detection mechanism (2) has an opening surface (5a) on only one side surface, and the side surface (fixing surface) (5b) facing the opening surface (5a) is the interior of the room. A box-shaped frame (5) fixed to the side wall of the space (1) and the upper side of the frame (5) near the lower end corner of the opening surface (5a) of the frame (5), that is, toward the upper right in the figure. And a pyroelectric sensor (4) as an infrared amount detecting means for outputting a light amount change signal in response to a change in the infrared light amount, and the mounting surface from the upper end corner of the opening surface (5a) of the frame (5). (5b) is attached so as to extend obliquely downward toward the lower end of the (5b), and is provided with a multi-split parabolic mirror (6) formed by vapor-depositing aluminum, nickel (gold) or the like on the inside. .

The parabolic mirror (6) is bent in a substantially V-shape in the middle while maintaining parallel to the lateral direction (direction orthogonal to the vertical direction) of the indoor space (1), and above it. Half of the infrared rays on the side closer to the human body detection device (inlet side) in the indoor space (1) and the infrared rays on the far side (back side) in the lower half are focused on the pyroelectric sensor (4). Then, in the upper half of the parabolic mirror (6), as shown in FIG. 6, a total of eight partial mirrors (6 _a1 )-( 6 _a8 ), the lower half of which is divided vertically with respect to the indoor space (1) and has the same width and half pitch as the partial mirrors (6 _a1 ) to (6 _a8 ) of the upper half. A total of seven partial mirrors (6 _b1 ) to (6 _b7 ) arranged so as to be offset are provided.

On the other hand, in the indoor space (1), as shown in FIG.
A detection area (1a) for detecting the human body position discontinuously divided into a total of 15 partial areas (A ₁ ) to (B ₇ ) vertically and horizontally by the partial mirrors (6 _a1 ) to (6 _b7 ). ) Is provided. Here, each of the partial areas (A ₁ ) to (B ₇ ) corresponds to the upper half of the partial mirrors (6 _a1 ) to (6 _a8 ), as shown in FIG. Side partial areas (A ₁ ) to (A ₈ ) arranged laterally and the lower half partial mirror (6 _b1 )
Corresponding to (6 _b7 ), it is composed of partial areas (B ₁ ) to (B ₇ ) arranged laterally on the back side. That is, the first partial area group (X ₁ ) in the lateral direction is formed by the partial areas (A ₁ ) to (A ₈ ) on the entrance side, and the partial areas (B ₁ ) to the inner side (B ₁ ) to
The second horizontal partial area group (X ₂ ) is formed by (B ₇ ). A non-detection region (Z) where infrared rays are not collected by the parabolic mirror (6) is provided between the partial areas (A ₁ ) to (B ₇ ).

On the other hand, as shown in FIG. 6, the shielding part (3) is provided in a long film shape and has a shielding plate (15) for covering the entire surface of the parabolic mirror (6) and the detection mechanism ( 2) A pair of take-up rollers (R1) and (R2) for taking up the shielding plate (15), which are provided on both sides of the opening surface (5a) of the frame (5) relative to each other, and A stepping motor (14) for rotating one of the winding rollers (R1) by a predetermined angle to slide the shield plate (15) to the left and right of the opening surface (5a).

And, as shown in FIG. 7, the shielding plate (15) is
The first opening portion (16) opened so that infrared rays from the indoor space (1) can enter the entire surface of the parabolic mirror (6), and infrared rays are emitted only in the upper half of the parabolic mirror (6). A second opening (17) opened so that light can enter, a third opening (18) opened so that infrared rays can enter only in the lower half of the parabolic mirror (6), and a parabolic mirror. The upper and lower parts of (6) are provided with a fourth opening (19) having a predetermined width different from each other so that infrared rays can enter.

Here, the first opening portion (16) is used for grasping the operating condition of the human body in the entire detection area (1a).

Further, the infrared rays from the lateral first partial area group (X ₁ ) and the second partial area group (X ₂ ) in the indoor space (1) are formed by the second and third openings (17) and (18). Are separately allowed to enter the pyroelectric sensor (4).

The fourth opening (19) is provided with the parabolic mirror (6).
Of the upper partial mirrors (6 _a1 ) to (6 _a8 ) adjacent to each other so as to allow light to enter, and an upper opening (19a) having a half width and a center thereof. The lower part of the parabolic mirror (6) is provided with a lower opening (19b) that allows light to enter one of the lower partial mirrors ( _6b1 ) to ( _6b7 ). For example, when the fourth opening (19) is located at the center of the opening surface (5a), two partial areas (A ₄ ) and (A ₅ ) on the entrance side are provided as shown by the solid line in FIG. Infrared rays from the rear partial area (B ₄ ) located between the two areas (A ₄ ) and (A ₅ ) can enter the pyroelectric sensor (4) at the same time. Further, when the entire shield plate (15) moves by one pitch, infrared rays can enter from the entrance side partial areas (A ₅ ) and (A ₆ ) and the back side partial areas (B ₅ ). In other words, of the partial areas (A ₁ ) to (A ₈ ) on the entrance side, the pair (A ₁ ) and (A ₂ ) adjacent to each other and the rear partial area (B ₁ ) sandwiched between them. A vertical first partial area group (Y ₁ ) is formed, and next two adjacent partial areas (A ₂ ),
The second partial area group (Y ₂ ) is formed by (A ₃ ) and the partial area (B ₂ ) on the back side, and thereafter, the seventh partial area group (Y ₇ ) is sequentially formed. That is, the shielding plate (1
5) shows the partial area groups (X ₁ ) and (X ₂ ) arranged in the horizontal direction among the partial areas (A ₁ ) to (B ₇ ) and the partial area groups (X ₁ ) arranged in the vertical direction ( The infrared rays of Y ₁ ) to (Y ₇ ) are shielded by the groups (X ₁ ) to (Y ₇ ) so that they can enter the pyroelectric sensor (4).

Here, in this example, each partial area group (Y _N ) and the next partial area group (Y _N +1) partially overlap each other in the partial area (A _N +1). Each of the partial area groups (Y ₁ ) to (Y ₁ ) to (Y) has a fourth opening (19) formed into a rectangular opening that blocks infrared rays from only the entrance side and the back side partial areas (A _N ) and (B _N ). ₇ ) may not overlap each other.

Further, a control device (7) for controlling the operation of the entire air conditioner is installed outside the frame (5), and the control device (7), as shown in FIG. An amplifier (8) for amplifying the infrared signal from the pyroelectric sensor (4), and a filter for extracting a characteristic of human motion among the infrared signals amplified by the amplifier (8) ( 9) and the infrared signal from the filter (9) and the reference voltage of the reference power source (10) are compared, and a comparator (11) which outputs a predetermined light amount change signal when the light amount change becomes a predetermined value or more. ), A CPU (12) for controlling the entire apparatus, and a drive circuit (13) controlled by the CPU (12) for driving the stepping motor (14).

Here, the stepping motor (14) receives the output of the drive circuit (13) and intermittently rotationally drives the winding roller (R1) of the shielding portion (13) around its rotation axis. In the detection area (1a), the shield plate (15) is horizontally moved over the entire opening surface (5a). Therefore, by the drive circuit (13), the stepping motor (14) and the shield plate (15), the parabolic mirror (infrared ray amount collecting means).
The scanning means (20) is configured to perform scanning so that the infrared light collection range according to (6) changes within the detection area (1a).

In the indoor space (1), the shield plate (15) is intermittently moved by the stepping motor (14), and infrared rays from the vertical and horizontal partial area groups (X ₁ ) to (Y ₇ ) are sequentially detected by the pyroelectric sensor. (Infrared amount detecting means) When entering the light (4),
The whole or part of the human body enters each partial area group (X ₁ ) to (Y ₇ ) from the non-detection area (Z) or the non-detection area (Z) from each partial area group (X ₁ ) to (Y ₇ ). Then, the amount of infrared light focused on the pyroelectric sensor (4) changes, and the light amount change signal is output by the comparator (11) of the control device (7). By CPU (12), and the signal related to the scanning location from said scanning means (20), each partial area group (X ₁₎ - (Y ₇₎ which part area (A ₁₎ a combination of the light amount change signals ~ The presence of a human body in (B ₇ ) is identified and detected. For example, horizontal partial area group (X ₁ )
When a light intensity change signal is output in the vertical partial area group (Y ₄ ), it is determined that a human body is present in the intersecting partial area (A ₄ ), and a human body detection signal is output. It is designed to be done. Therefore, the above CPU (1
2) detects the presence or absence of a human body based on the change in the amount of infrared light from each of the partial areas (A ₁ ) to (B ₇ ) detected by the pyroelectric sensor (infrared amount detecting means) (4) It has a function as a human body detecting means for outputting a human body detection signal.

Next, the control of the control device (7) will be described based on the flowchart of FIG. However, in order to generally describe the flow, each of the partial areas (A ₁ ) to (B ₇ ) of this embodiment in the indoor space (1) is divided into K detection areas (AR) as shown in FIG. -1), (AR-2), ... (AR-
k), ... (AR-K).

First, in step S ₁ , the human body is sensed in the entire detection area (1a) using the first opening (16) of the shield plate (15), and in step S ₂ , the presence or absence of a human body detection signal is detected. If there is a human body detection signal, the process proceeds to step S ₃ to determine whether the air conditioner is in operation.
Then, as it if the air conditioner is in operation, in the "ON" the air conditioner at Step S ₄ if not in operation, the process proceeds to step S _5, during the predetermined time τ detection area (1a) After sensing the human body for the whole area,
In steps S ₆ , S ₇ , and S ₈ , the number of times the human body detection signal is received (human body detection number) n is calculated, the human body detection frequency, that is, the ratio α of the number of detection times to a fixed time τ, is calculated, and a predetermined value based on the result is calculated. The setting of the human body sensing time τs is sequentially executed.

When the setting of the predetermined time τs is completed by the above, the step
In S ₉ , each detection area (AR-1) to (AR-K) with k = 1
After performing the initial settings for scanning
_{At 10} , human body sensing is performed in the area (AR-k) for a predetermined time τs. Next, to determine whether the human body detection signal is outputted in step S _11, by adjusting the inclination of the vertical louvers and horizontal louvers of the air conditioner in step S ₁₂ only when the human body detection signal is outputted Wind direction control is performed so that the wind direction of the conditioned air is directed to the partial area (AR-k) where the human body detection signal is output. Then, steps S ₁₃ , S ₁₄ and S ₁₅
In that area (AR-k), the number of human body detection times nk, the memory of the number of human body detection times nk, and the next area (AR-k +
After sequentially performed and numbers updates to 1), in step S _16,
For all the partial areas (AR-1) ~ (AR -K), the process proceeds to step S ₁₇ and waits until the control is completed.

In step S ₁₇ , the human body detection count nk obtained above is obtained.
Is "0" for all areas (AR-1) to (AR-K), and if all "0", it is judged that a person has left the room and the above step S the program returns to _1, unless all the human body detection times nk "0", in step S _18, n
For the area (AR-k) where k is not "0", the scanning order is determined in descending order of nk. That is, the maximum number of detections nk
The address of the area (AR-kmax) showing max is set as k = 1, and the address of the area (AR-kmin) showing the minimum detection number nkmin is set as k = K, and the priority detection area (AR-kmax) is set. ~ (AR
-Kmin) is set. Then, in step S _19, after clearing the memory input in step S _14, the process returns to step S _19, following the steps for k = 1 to K S
₉ ~S ₁₉ a repeat run.

Note that when the determination in step S ₂ is ON is not output the human body detection signal, the process proceeds to step S _20, as it is if the air conditioning apparatus is in operation, step S if in operation the air conditioner waiting 3 minutes in step S ₂₂ After the "OFF" has been made to return to step S ₁ in _21.

In the above flow, the invention of claim (1), in step S _18, CPU (human body detection means) (12) receiving an output of, based on the human body detection times human body detection frequent partial area (A ₁₎ Area setting means (21) for setting (B ₇ ) to (B ₇ ) as priority detection areas is configured, and by steps S _{9 to} S ₁₆ ,
The scanning area by the scanning means (20) is set to cover the entire detection area (1a) for a predetermined time after the start of human body detection,
After that, a human body detection control means (22) for controlling so as to limit the priority detection areas (AR-kmax) to (AR-kmin) set by the area setting means (21).

Further, in the invention of claim (2), by step S ₁₂ ,
A wind direction control means for controlling the inclinations of the vertical louvers and the horizontal louvers so that the wind directions of the conditioned air are directed to the partial areas (A ₁ ) to (B ₇ ) where the human body is present, by receiving the output of the human body detection means (12). 23) is composed.

Therefore, in the above embodiment, the scanning means (20) is controlled by the human body detection control means (22) so as to cover the entire detection area (1a) for a predetermined time τs after the human body detection is started, and the detection area (1a) is detected. 1a) All partial areas (A ₁ ) ~
The presence of the human body is detected for (B ₇ ), and as a result, the area setting means (21) sets only the places where the human body detection frequency nk is large as the priority detection areas (AR-kmax) to (AR-kmin). . Then, thereafter, the scanning area of the scanning means (20) is set to the priority detection areas (AR-kmax) to (AR-
Since it is controlled so that it is limited to kmin), there is no need to always perform human body detection for all partial areas (A ₁ ) to (B ₇ ) of the entire detection area (1a) as in the past, and the human body detection system It is possible to reduce the time required for detection while maintaining the above.

In the invention of claim (2), the control device (7)
In response to the signal from the CPU (12), the wind direction control means (23) directs the wind direction of the conditioned air of the air conditioner toward the partial areas (A ₁ ) to (B ₇ ) where the presence of the human body is detected. The tilt of the vertical and horizontal louvers is controlled. Therefore, a comfortable air conditioning effect can be exhibited by focusing on the air conditioning of the place where the human body is present in response to the rapid detection of the human body position by the human body position detecting device.

In addition, in the above-mentioned embodiment, the vertically divided multi-division type parabolic mirror (6) is used as the infrared light converging means, but the present invention is not limited to the above-mentioned embodiment, and a parabola is used. It goes without saying that a spherical mirror, an elliptic mirror, for example, a multi-division Fresnel lens made of polyethylene or the like can be used instead of the face mirror (6).

Further, the scanning means (20) is not certified by the above embodiment, and for example, a lens for condensing infrared rays from only a single partial area (A) is provided, and the entire detection mechanism (2) is rotated. Drive to drive the partial area (A) to the detection area (1a)
You may make it scan over the whole region.

Further, in the above embodiment, the partial areas (A ₁ ) to (B ₇ ) in the detection area (1a) are divided into vertical and horizontal partial area groups (X ₁ ),
The signals are divided into (X ₂ ) and (Y ₁ ) to (Y ₇ ) and the infrared amount change signal for each partial area group (X ₁ ) to (Y ₇ ) is used to determine each partial area (A ₁ ) to (B ₇ Although the presence of the human body in ( ₁ ) is detected, it goes without saying that the partial areas (A ₁ ) to (B ₇ ) may be sequentially scanned one by one.
In the case of the above embodiment, the vertical and horizontal partial area groups (X ₁ ) to
Since only (Y ₇ ) needs to be scanned, there is an advantage that the number of scans can be further reduced.

(Effect of the invention) As described above, according to the human body position detecting device of the invention of claim (1), when detecting the human body position in the detection area, the detection area is detected for a predetermined time after the start of the human body detection. While human body detection is performed for each partial area of the entire area, after that, human body detection is performed only for the partial areas where human body detection frequency is high, so there is no need to always perform human body detection for all partial areas. Therefore, it is possible to shorten the human body detection time while maintaining high human body detection accuracy regardless of the moving speed of the human body.

According to the air conditioner of the invention of claim (2), the inclination of the vertical and horizontal louvers of the air conditioner is controlled according to the human body detection signal, and the air conditioning is performed in the direction of the partial area where the presence of the human body is detected. Since the air is supplied, it is possible to obtain a comfortable air conditioning effect according to the existing position of the human body in response to the rapid detection of the human body position by the human body position detecting device.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of the present invention. 2 to 10 show an embodiment of the present invention, FIG. 2 is a plan view of the indoor space, FIG. 3 is a vertical sectional view of the indoor space, and FIG. 4 is a perspective view showing the outline of the detection mechanism. , FIG. 5 is a longitudinal sectional view thereof, FIG.
Figure is its front view, Figure 7 is a development view showing the details of the shielding plate,
FIG. 8 is a signal path diagram showing a control system of the human body position detecting device,
FIG. 9 is a flowchart showing a control flow, and FIG. 10 is an explanatory diagram of a human body detection area during human body detection control. (1a) .... detection area, (A ₁₎ ~ (B ₇₎ ...... portion area, (X ₁₎ ~ (Y ₇₎ ...... portion area group, (4) .... pyroelectric sensor (infrared detecting means ), (6) ... parabolic mirror (infrared ray focusing means), (12) ... CPU (human body detection means), (20) ... scanning means, (21) ... area setting means,
(22) …… Human body detection control means, (23) …… Wind direction control means.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display area // A61B 5/107

Claims (2)

[Claims] 1. A detection area (1a) divided into partial detection areas (A ₁ ) to (B ₇ ) for individually detecting the presence of a human body.
Infrared amount detecting means (4) for detecting the infrared ray amount of the infrared ray, an infrared ray focusing means (6) for focusing the infrared ray from the detection area (1) on the infrared ray amount detecting means (4), and the infrared ray amount detection The human body detecting means (12) for detecting the presence or absence of a human body based on the change in the infrared ray amount detected by the means (4) and the infrared ray collecting range by the infrared ray amount collecting means (6) are the detection areas (1a ) Scanning means (2
0) and receiving the output of the human body detecting means (12), the priority of scanning the partial areas (A ₁ ) to (B ₇ ) based on the number of times of human body detection is high. The area setting means (21) set in order and the scanning area of the scanning means (20) are evenly distributed over the entire detection area (1a) for a predetermined time after the start of human body detection, and thereafter the area setting is performed. A human body position detecting device comprising: a human body detection control means (22) for controlling the scanning means (20) so as to move in accordance with the priority order set by the means (21). 2. A detection area (1a) divided into partial detection areas (A ₁ ) to (B ₇ ) for individually detecting the presence of a human body.
Infrared amount detecting means (4) for detecting the infrared amount of the infrared ray, an infrared ray condensing means (6) for condensing the infrared ray from the detection area (1a) on the infrared ray amount detecting means (4), and the infrared ray amount detecting means The human body detecting means (12) for detecting the presence or absence of a human body based on the change in the infrared ray amount detected by the means (4) and the infrared ray collecting range by the infrared ray amount collecting means (6) are the detection areas (1a ) Scanning means (2
0) and receiving the output of the human body detecting means (12), the priority of scanning the partial areas (A ₁ ) to (B ₇ ) based on the number of times of human body detection is high. The area setting means (21) set in order and the scanning area by the scanning means (20) are evenly distributed over the entire detection area (1a) for a predetermined time after the start of human body detection, and thereafter the area setting is performed. The human body detection control means (22) for controlling the scanning means (20) so as to move in accordance with the priority order set by the means (21) and the output of the human body detection means (12), and the wind direction of the conditioned air is changed. Wind direction control means for controlling the inclinations of the vertical louvers and the horizontal louvers so as to face the partial areas (A ₁ ) to (B ₇ ) according to the order of frequency of human body detection (2
3) An air conditioner characterized by having and.