JP2518411B2 - Spot air conditioner - Google Patents

Description

The present invention relates to a spot air conditioner that blows out conditioned air from a blowout duct to perform local cooling, etc., and particularly changes the direction of the blowout duct based on a person detection signal from a person detecting means. Controlling spot air conditioners.

(Prior Art) Generally, in various factories and the like, spot air conditioners for local cooling are provided to improve the working environment. In such a spot air conditioner, a compressor, a condenser, an evaporator and a refrigerant circuit having an expansion mechanism are housed in a housing mounted on a wagon, and a condensing fan and an evaporating fan are housed. The cold air that has exchanged heat with the evaporator is blown out toward the worker from a blowing duct connected to the upper part of the housing to perform local cooling. Further, the blowout duct is connected to the rocking cylinder,
The swing cylinder is pivotally supported on the housing by a diametrical pin, and a motor is connected to the housing via a link mechanism. Then, the motor is driven to swing the blowout duct to ensure cooling in a wide range.

In the above-mentioned spot air conditioner, the blow duct is configured to switch between a fixed mode and a swing mode by driving or stopping the motor with a swing switch.

However, in this spot air conditioner, no consideration is given to the movement of the worker who is the subject of air conditioning, and when this worker moves, in the fixed mode, the cold air is blown out in an unnecessary direction. Is wasted and the comfort of air conditioning is not exhibited at all. Further, in the swing mode, the cold air blowing direction changes regardless of the movement of the worker, so that the cool air is only intermittently blown toward the worker and sufficient comfort is achieved. Is not planned.

Therefore, the applicant of the present application has developed a spot air conditioner that detects an air-conditioning person by means of a person detecting means and moves the blowout duct following the movement of the air-conditioning person to improve comfort by air-conditioning. , Filed separately (Japanese Patent Application No. 63-
See 293079).

(Problems to be solved by the invention) By the way, an infrared reflection sensor is known as a conventional human detection means, but since a conventional general infrared reflection sensor cannot distinguish an air-conditioned person from an object, When having a tracking function, in order to distinguish the object of air conditioning from the object,
It is necessary to provide two infrared light emitting elements and one infrared element (see Japanese Patent Application No. 1-82916), and the mounting of these elements must be angled, and the relative angle determination of these elements is troublesome. Is.

The present invention has been made in view of the above points, and an object of the present invention is to provide a spot air conditioner capable of reliably detecting a person to be air-conditioned by an infrared reflective sensor having one infrared light emitting element and one infrared light receiving element. It is a thing.

(Means for Solving the Problems) As shown in FIGS. 2 and 3, the present invention provides an air conditioner main body (12) that sucks indoor air and generates conditioned air, and an air conditioner main body (12). It is premised on a spot air conditioner having a rotatable blowout duct (16) attached to blow out the conditioned air and a duct drive means (2) for rotationally driving the blowout duct (16).

However, as shown in FIG. 1, the invention of claim 1 comprises an infrared reflection type sensor having one infrared light emitting element and one infrared light receiving element, and is arranged at the tip of the blowout duct (16). A person detecting means (9) for detecting a person to be air-conditioned,
When the signal from the person detecting means (9) is received and the signal output is equal to or more than a set value, the blowing duct (16) is moved to a predetermined angle (±
a drive control means (10) for making a slight rotation by θ ₁ ), detecting stop and movement of the person to be air-conditioned based on the change in the signal output, and controlling the outlet duct (16) to track the person to be air-conditioned. It is characterized by

According to the invention of claim 2, the person detecting means (9) is arranged at the tip of the blowing duct (16).

According to a third aspect of the present invention, there is provided an infrared reflection type sensor having one infrared light emitting element and one infrared light receiving element, which is arranged at the tip of the blowing duct (16) and detects a person to be air-conditioned (9). ) And the signal from the person detecting means (9) and the signal output is equal to or more than a set value, the outlet duct (1
When 6) is rotated by a predetermined angle (2θ ₂ ) and the signal output at that time is equal to or more than the set value, the outlet duct (16) is reversed by a predetermined angle (θ ₂ ) and it is determined that a person is detected. Finely rotate the outlet duct (16) by a predetermined angle (± θ ₁ ),
A drive control means (10) for detecting the stop and movement of the person to be air-conditioned by the change in the signal output and controlling the blowout duct (16) to track the person to be air-conditioned.

(Operation) According to the invention of claim 1, first, the drive control means (10)
Receives a signal from the human detection means (9), and when the signal output is equal to or more than a set value, the outlet duct (16) is slightly rotated by a predetermined angle range (± θ ₁ ) to change the signal output. Detects the stop and movement of the person to be air-conditioned, and controls the blowout duct (16) to track the person to be air-conditioned.

According to the invention of claim 2, the person detecting means (9) is scanned by the duct driving means (2) of the blowout duct (16).

According to the third aspect of the invention, the drive control means (10) receives the signal from the human detection means (9), and when the signal output is equal to or more than a set value, the blowing duct (16) is set to a predetermined angle (2θ ₂ ). If it rotates and the signal output at that time is equal to or more than the set value, the blowout duct (16) is reversed by a predetermined angle (θ ₂ ) and it is determined that a person is detected. Aim at the center of the human body and then set the outlet duct (16) at a specified angle (± θ ₁ )
Only by slightly rotating, the stop and movement of the person to be air-conditioned is detected by the change in the signal output, and the blow-out duct (16) is controlled to track the person to be air-conditioned.

(Example) Hereinafter, the Example of this invention is described in detail based on drawing.

In FIGS. 2 and 3 showing the overall configuration of the spot air conditioner, (1) is a spot air conditioner, which is provided in various factories and the like, and performs local air conditioning by blowing cool air to an air conditioning target person such as an operator. Is.

The spot air conditioner (1) is configured such that an air conditioner main body (12) is mounted on a wagon (11) having casters (11a) so that the wagon (11) can move freely.
It is formed in two steps, b) and the lower part (11c). The air conditioner body (12) includes a compressor (12a) and a condenser (1
2b), an expansion mechanism (not shown) and an evaporator (12c) are connected by a refrigerant pipe (not shown), and the compressor (12a) has a lower part of the wagon (11) ( 11
In the lower part (11c) of the wagon (11), a drain tank (13), an electric box (14), etc. are installed in the housing (15) of the air conditioner body (12) in the lower part (11c) of the wagon (11). ) Is stored and installed inside.

The upper part (11b) of the wagon (11) has a housing (1
5) The condenser (12b) and the evaporator (12c) are provided on both sides of the inside, and one motor (12d) is provided in the center.
A condensing fan (12e) and an evaporating fan (12f) are connected to and housed in. In addition, the housing (1
A condenser side exhaust port (15b) is opened in the upper surface plate (15a) of 5), and the blowout duct (16) is connected to the duct driving means (2).
The outlet duct (16) is formed of a flexible pipe whose wind direction is freely changeable, and is attached to the discharge port (12g) of the evaporation fan (12f) of the housing (15). It is communicated via the top plate (15a). Then, the indoor air that has flowed in from one side surface of the housing (15) due to the driving of both fans (12e, 12f) exchanges heat in the condenser (12b) to become warm air, and is discharged upward from the exhaust port (15b). On the other hand, the indoor air that has flowed in from the other side surface of the housing (15) exchanges heat in the evaporator (12c) to become cold air, and is blown out from the blowout duct (16) toward the person to be air-conditioned.

In addition, (17) is a drain pan provided in the lower part of the evaporator (12c), and is connected to the drain tank (13) to guide the drain of the evaporator (12c) to the drain tank (13). .

The duct drive means (2) is a drive mechanism (4) housed in a casing (3) attached to an upper plate (15a) of the housing (15), as shown in FIGS. 4 and 5. And a rotating mechanism (5).

Specifically, in FIG. 8, the casing (3) has a drive mechanism housing (21) surrounded by side walls (31, 32, 33) in the right half and the left half in the left half. Side wall (34)
A rotation mechanism housing portion (22) surrounded by a circle, and between the drive mechanism housing portion (21) and the rotation mechanism housing portion (22) and on the cold air blowing side of the rotation mechanism housing portion (22). In the four mounting boss portions (22a, 22b, 22c, 22d) of the above, the casing (3)
Is attached and fixed to the housing (15).

The drive mechanism storage section (21) includes a motor mounting section (21A) to which a duct motor (41) composed of a geared motor is mounted, an electronic control unit (25), a setting switch plate (26) and a relay harness (27A). And a control section (21B) in which a hollow cover member (6
The upper side is covered by 1).

As shown in FIGS. 6 and 7, the inside of the cover member (61) is divided into a motor mounting portion (21A) and a control portion (21B) by a partition wall (61a) which becomes thinner as it goes downward. Correspondingly, it is divided into a first chamber (62) as a motor chamber and a second chamber (63) as a control chamber, and is attached to the casing (3) at the outer lower part of one wall (61b). The mounting portions (64, 64) for are projected.

Further, a plurality of slits (66) as air outlets extending in parallel with the partition wall (61a) are formed in a portion of the upper wall (65) of the cover member (61) on the first chamber (62) side, and In the other two wall parts (61c, 61d) except the wall part (61b) where the mounting part (64, 64) is projected, the air intake (67, 68) is connected to the exhaust port (15b). It is opened to be adjacent. On the other hand, the recess (69) is formed in the portion of the upper wall (65) on the second chamber (63) side.
Are formed in the recess (69), and openings (69a, 69a) through which the knob (26a) of the internal setting switch plate (26) projects are formed in the recess (69).

The upper wall (35) of the casing (3) is provided with an opening (35a) through which the rotating mechanism (5) penetrates, and the inner surface (lower surface) of the upper wall (35) rotates. The guide wall (36) of the mechanism (5) is formed so as to project slightly downward. The guide wall (36) is close to the opening (35a), and the front side wall (3
4), the guide wall (36) and the upper end of the front side wall (34) form an annular guide portion (37) of the rotating mechanism (5). (38) is a fixed part of the casing (3) to which the mounting part (64) of the cover member (61) is mounted.

A plurality of fixed columns (not shown) for fixing the lower support plate (23) of the drive mechanism (4) and the rotation mechanism (5) to the side walls (31 to 34) and the guide wall (36). Are continuously formed, and a fan (12f) for evaporation is provided on the lower receiving plate (23).
Has an opening (23a) communicating with the discharge port. The opening (23a) is formed concentrically with the opening (35a) of the upper wall (35), and is bent upward at the periphery of the opening (23a) of the lower support plate (23) to form an annular folded piece ( 23b) is L-shaped.

As shown in FIG. 4, the drive mechanism (4) is composed of an output shaft (41b) of a duct motor (41) to which a connecting shaft (42) and a belt transmission mechanism (43) are connected. The gear head (41c) is fixedly supported by the upper wall (35), and the output shaft (41b) is erected so as to be substantially orthogonal to the upper wall (35).

As a result, the first duct motor (41) is housed.
The chamber (62) is separated from the second chamber (63) by the partition wall (61a) and the internal space of the casing (3) having the rotating mechanism (5) by the motor mounting surface (41d). The eighth
In the figure, (35b) is a motor mounting hole, and (35c) is an electronic control unit mounting hole.

As shown in FIG. 9, the connecting shaft (42) includes a motor-side upper shaft (45) mounted and fixed to the output shaft (41b) with a hexagon socket set screw (44), and a belt transmission mechanism (43). The timing pulley (46) is bisected by the pulley side lower shaft (47) slidably fitted therein.

The lower end protruding shaft portion (47a) of the pulley-side lower shaft (47) is supported by the lower receiving plate (23) in the vertical direction via a bearing (48). Therefore, the connecting shaft (42) has one bearing (4
It will be supported only by 8).

As shown in FIG. 10, the upper shaft (45) is composed of a large diameter portion (45a) and a small diameter portion (45b), and outputs from the large diameter portion (45a) to the middle of the small diameter portion (45b). A fitting insertion hole (45c) into which the shaft (41b) is fitted is provided, and an end surface (45) on the small diameter portion (45b) side is provided.
A notch (45e) opening downward is formed from d) to the end of the fitting insertion hole (45c). Then, the fitting hole (4
The output shaft (41b) fitted in the 5c) is fixed by the set screw (44) screwed into the screw hole (45f), and the notch (45e)
The pin member (49) fitted to the lower shaft (47) is fitted to the shaft, and when the upper shaft (45) and the lower shaft (47) are connected, the notch (45e) and the idle rotation described later are connected. The universal joint mechanism (6) that absorbs the deviation of the shaft center of both shafts (45, 47) is configured in relation to the pin member (49) of the mechanism (7).

Further, the lower shaft (47) on the pulley side is fitted and mounted on the flange (47b) at the lower end, and the belt transmission mechanism (43) is mounted.
Timing pulley (46) is fitted. The timing pulley (46) has a toothed portion (46a) formed on the outer peripheral surface thereof so that the toothed belt (28) is engaged therewith, and the outer periphery of the lower shaft (47) and the inner concave portion of the timing pulley (46). (47c)
A compression spring (30) is interposed between the spring seat (29) fitted in the upper part and regulated by the pin member (49), and the timing pulley (30) is driven by the spring force of the compression spring (30). 46) is the flange (47b) of the lower shaft (47)
The timing pulley (46) is slidably fitted to the lower shaft (47), and the duct motor (41) constitutes the idling mechanism (4a). In addition, (27B) is a relay harness.

On the other hand, in the rotating mechanism (5), the blowout duct (16) is connected to the rotary cylinder (51) via the elbow (52), and the rotary cylinder (51) is connected to the rotary cylinder main body (51a). The upper part is fitted into the annular guide part (37), and the lower part is fitted onto the folded-back piece (23b) of the lower receiving plate (23) to be supported in the vertical direction.

An annular extension piece (51b) desired for the opening (35a) is continuously formed upward on the inner peripheral portion of the upper end surface of the rotary cylinder body (51a), while a band-shaped projection (51c) is formed on the upper outer peripheral surface. ,
Tooth portions (51d) are formed on the lower outer peripheral surface, and the toothed belt (28) of the belt transmission mechanism (43) is hooked on the tooth portions (51d).

Further, an upper sliding sheet (53) is provided between the rotary cylinder body (51a) and the upper casing (3).
Lower sliding sheets (54) are respectively interposed between the lower portion of the rotary cylinder body (51a) and the lower support plate (23), and the rotary cylinder body (51a) is urged by the spring force of the lower support plate (23). The upper and lower end surfaces are sealed by being pressed upward.

Further, as shown in FIG. 4, the elbow (52) extends obliquely forward and upward from the rotary cylinder (51), and the lower end is fitted to the annular extension piece (51b) of the rotary cylinder (51). With
An outlet duct (16) is fitted on the upper end portion. In addition, on the upper side of the inner peripheral surface of the outlet duct (16), the relay harness (27
C) is fitted with push rivets (59,59).

Further, as shown in FIG. 4, an angular position member (81) is provided on the rear outer peripheral portion of the rotary cylinder body (51a), and the angular position member (81) is directed downward. It is formed by being formed on a plurality of convex portions which extend and are provided corresponding to the rotation angle of the blowout duct (16).

On the other hand, in the casing (3), the outlet duct (16)
A photo interrupter (82) forming a position detecting means for detecting the rotational angle position of the is attached via a printed circuit board (83). The photo interrupter (82) has a light emitting element and a light receiving element arranged side by side in a predetermined space, and an angular position member is formed in the space between the light emitting element and the light receiving element by the rotation of the blowing duct (16). The projection of (81) is designed to pass through. Therefore, when the emitted light of the light emitting element is shielded by the convex portion of the angular position member (81), the convex portion is optically detected without contact, and the blowing duct (1
It is configured so that the rotation angle position of 6) is detected.

Further, one person detection sensor (9), which is a person detection means for detecting a person to be air-conditioned in the front, is attached to the upper end of the outlet duct (16), and the person detection sensor (9).
Is the directivity angle (± θ
₁ ) One infrared light emitting element and one infrared light receiving element, and reflection of infrared light emitted from the infrared light emitting element is detected by the infrared light receiving element. However, in this embodiment, all the elements are oriented in the same direction, the infrared light emitting element and the infrared light receiving element are arranged above and below, and the directivity of the directivity angle (± θ ₁ ) is narrow.

In FIG. 1 showing a control block diagram of the spot air conditioner (1), a human detection signal output from the human detection sensor (9) is an A / D converter (7) included in a control unit (73).
It is converted into a digital signal in 4) and input to the CPU (75). The CPU (75) has the photo interrupter (8
The angular position signal output by 2) is input, and the mode signal output by the mode selection switch (76) for switching the blowout duct (16) between the fixed mode, the automatic swing mode and the person tracking mode is also output by the CPU (75 ) Is to be entered.

Further, the control unit (73) stores in advance program data for realizing a control flow described later.
Memory consisting of ROM and RAM for storing processing data (77)
Is connected to the CPU (75).

Furthermore, the control unit (73) further includes a right rotation drive circuit (78) and a left rotation drive circuit (79) that form a drive control means (10) for the duct motor (41), and an air conditioning control means ( The relay drive circuit (80) of the first relay (RY1) and the second relay (RY2) that composes 8) is provided so as to be connected to the CPU (75). The duct motor (41) is controlled by the drive circuit (78, 79) for right rotation and left rotation based on the output signal of the CPU (75), while the relays (RY1, RY2) are The relay drive circuit (80) controls ON / OFF based on the output signal of the CPU (75). Furthermore, both relays (RY1, RY
2) The fan control relay (X1) and compressor control relay (X2) are turned on and off by the fan motor (12d).
And the compressor motor (12h) are drive-controlled.

Next, the air conditioning control operation of this spot air conditioner (1) will be described based on the control flow shown in FIGS. In the following, a fixed mode in which the blowout duct (16) is fixed in a fixed direction, an automatic swing mode in which the blowout duct (16) automatically swings, and a blowout mode (16) The person tracking mode in which the rotation follows the movement will be described in order.

Therefore, first, the fixed mode will be described. After the power is turned on, initialization is performed in step ST1, for example, after resetting each flag STF, HKF, MKF, the process proceeds to step ST2, and the fans (12e, 12f) and The compressor (12a) is driven. In other words, the relay drive circuit (80) causes the first and second relays (RY1, RY1,
RY2) to ON and fan control and compressor control relays (X
1, X2) is turned on, and the fan motor (12d) and the compressor motor (12h) are driven.

After that, the process proceeds from step ST2 to step ST3, the mode is determined, and since the mode is currently set to the fixed mode by the mode changeover switch (76), the process proceeds to step ST4.
If the duct motor (41) for rotating the outlet duct (16) is driven, stop it, and then move to step ST5 to detect a person detection flag (HKF), a person non-detection flag (MKF) and various timers ( TM1, TM4) are reset.

Next, in step ST6, if the fans (12e, 12f) are stopped, turn on the fan control relay (X1) to drive it, then move to step ST7 and stop the compressor (12a). Then, it is determined whether or not 3 minutes have elapsed. That is, in order to prevent continuous start / stop of the compressor (12a), once stopped, the compressor is not restarted for 3 minutes. If 3 minutes have not elapsed, the process moves from step ST7 to step ST8.
While returning to step ST3 with the compressor (12a) stopped, move from step ST7 to step ST9 if 3 minutes have elapsed, and if the compressor (12a) is stopped, control the compressor Turn on the relay (X2) and turn on the compressor (12a)
Drive and returns to step ST3.

Then, the operations from step ST3 to step ST9 are repeated, and the cold air is constantly blown out in a fixed direction. At this time, the blowing duct (16) is a flexible pipe in the blowing direction, so that the worker etc. ) Will be appropriately curved and set manually.

Next, the automatic swing mode will be explained. After the power is turned on, the steps ST1 to ST3 operate in the same manner as the fixed mode, and in this step ST3, the mode changeover switch (76) is set to the automatic swing mode. Therefore, the automatic swing mode is determined and the process moves to step ST10. The duct motor (41) is driven to drive the blowout duct (16).
Rotate back and forth.

After that, the process moves from Step ST9 to Step ST3, and the same operations as in the fixed mode are performed up to Steps ST8 and ST9, and the process returns to Step ST3. Then, by repeating the above-described operation, the blowout duct (16) automatically swings to blow cold air into the air-conditioning region (100 degrees in this example).

Next, the person tracking mode will be described. Therefore, first, the signal processing operation of the human detection sensor (9), which is the basis of the direction control of the outlet duct (16) and the like, will be described based on the control flow of FIG.

When starting, first, in step ST101, the outlet duct (16) is driven, and then in step ST102, it is determined whether or not the output (H) of the human detection sensor (9) is equal to or higher than a set value (Hs ₂ ).

If it is equal to or more than the set value (Hs ₂ ), it is determined to be human detection in step ST103. If it is not the set value (Hs ₂ ) or more, it is determined that there is no person to be air-conditioned, and the process returns to step ST101.

Then, after the human detection is determined in step ST103, the outlet duct (16) is moved from (+ θ ₁ ) to (−θ ₁ ) in step ST104.
Then, in step ST105, it is determined whether or not the output (H) of the human detection sensor (9) at the time of (+ θ ₁ ) is the set value (Hs ₁ ) or more. If the set value (Hs ₁₎ above, followed by determining whether or not output in step ST 106 (- [theta] ₁₎ at the human detection sensor (9) (H) the set value (Hs ₁₎ or more. Then, in step ST105, the set value (H
s ₁ ) If it is not above, part of the human body of the person to be air-conditioned, which would have been present if it had stopped, does not exist on the right side.
Therefore, since it is determined that the person has moved to the left side, it is determined in step ST107 that the person has moved to the left, and step ST1
At 08, the outlet duct (16) is rotated counterclockwise to perform a person tracking operation.

On the other hand, if the output of the human detection sensor (9) is greater than or equal to the set value at (−θ ₁ ) in step ST106, it is determined that the person is stopped, and the process returns to step ST103. In step ST109, the air conditioning worker determines that the air-conditioning worker has moved to the right, and in step ST110, the outlet duct (16) is rotated to the right to perform a person tracking operation.

Here, when the person to be air-conditioned is stopped due to the slight movement of the blow-out duct (16), as shown in FIG. 16, (+ θ ₁ ) ~
The output exceeds the set value in the range of (-θ ₁ ), but when the person to be air-conditioned moves to the right, as shown in FIG.
The output becomes lower than the set value on the θ ₁ ) side. When it moves to the left, the output becomes low on the (+ θ ₁ ) side as shown in FIG. By utilizing such a state, the moving direction of the person to be air-conditioned is identified.

Subsequently, the control operation in the human tracking mode based on the signal processing operation of the human detection sensor (9) described above will be described with reference to FIGS. 12 to 14.

First, after the power is turned on, the operation is the same as in the fixed mode from step ST1 to step ST3. In this step ST3, the mode change switch (76) is set to the person tracking mode, so this person tracking mode is determined. Step ST
The process moves to 11, and it is determined whether the human detection flag (HKF) is "0". Since the human detection flag (HKF) is reset when the power is turned on, step ST12
Go to step ST13, if the person detection sensor (9) described above outputs a person detection signal, and if the person detection is not determined in step ST103 described above, the process proceeds to step ST13, and in step ST103 When the determination of detection is made, it moves to step ST30.

Therefore, if the person to be air-conditioned is not detected (see FIG. 13), the undetected person operation is started in step ST13, and step
In ST14, it is determined whether or not the person undetected flag (MKF) is "0". Then, since this person detection flag (MKF) has been reset when the power is turned on, the routine moves from step ST14 to step ST15, advances the second timer (TM2) and proceeds to step ST16, and the second timer (TM2) ) it is determined whether or not elapsed a preset short waiting time (t ₂₎ is a step ST until after the short-term standby time (t ₂₎
From 16 will move to step ST17. Then, from step ST17, the short-term standby operation is performed, and the operation for searching for the person to be air-conditioned is performed. That is, the above step ST
At 17, the duct motor (41) is driven to cause the blowout duct (16) to perform a swinging motion as in the automatic swinging mode described above.

Then, move to step ST18, both fans (12e, 12f)
If is stopped, drive and move to step ST19,
Similar to step ST7 described above, it is determined whether or not 3 minutes have elapsed after stopping the compressor (12a) to prevent continuous start / stop of the compressor (12a), and after 3 minutes, the process proceeds to step ST20 When (12a) is being activated or driven, it continues to be driven as it is, and before 3 minutes have passed, the process proceeds to step ST21 and the compressor (12a)
It will return to step ST3 while stopping a).

Then, the operations from step ST11 to step ST21 described above are repeated. Specifically, the short-term standby time (t ₂ ) is set to, for example, 5 minutes, and when the human detection sensor (9) does not detect the person to be air-conditioned, the compressor (12
a) and the fans (12e, 12f) are driven to wait for 5 minutes for the person to be air-conditioned to enter the air-conditioning area while the cold air is being steered, and at the same time, the outlet duct (16) is rotated to move the air-conditioning area. I am searching for people to be air-conditioned.

After that, when the person to be air-conditioned cannot detect it before the short-term standby time (t ₂ ) elapses, it shifts to the long-term standby operation, and first proceeds from step ST16 to step ST22 to stop the duct motor (41) and blow out the duct. After stopping (16) in the center of the air conditioner body (12), move to step ST23, turn off the fan control relay (X1) and compressor control relay (X2), and turn off both fans (12e, 12f). ) And compressor (12
Stop a).

Then, it moves to step ST24, resets the second timer (TM2), moves to step ST25, sets the person undetected flag (MKF) to "1", moves to step ST26, and moves to the third timer (TM3). ) Is stepped to step ST27, and it is determined whether or not the third timer (TM3) has passed the preset long-term waiting time (t ₃ ). Then, the process returns from step ST27 to step ST3 and repeats the above-mentioned operation until the long-term waiting time (t ₃ ) elapses. At that time, since the person undetected flag (MKF) is set (step ST25), The process returns from step ST14 to step ST22, and the second timer (TM2) does not increment. This long waiting time (t ₃₎ within the human detection sensor (9) is the long expected machine time without detecting the air-conditioning subject when (t ₃₎ has elapsed, proceeds from step ST27 to step ST28, the third timer (TM3) After resetting, the process proceeds to step ST29, the system goes down, the system is restarted by turning on the power again, and the control flow starts from step ST1. That is, in the long-term standby operation, specifically, the long-term standby time (t ₃ ) is set to, for example, 1 hour, and there is no person to be air-conditioned even after the short-term standby time (t ₂ ) has elapsed. , Compressor (12a) and fan (12e, 12f)
Even if you stop, stop blowing cold air or blowing air,
The blowout duct (16) is stopped at the center, and the entry of an air-conditioned person is awaited.

And if there is no person to be air-conditioned after 1 hour,
Even if the whole system is stopped and the person to be air-conditioned enters the human detection sensor (9) monitoring area, the compressor (12a) and the like will not be automatically started.

Next, in this human tracking mode, when the human detection sensor (9) outputs a human detection signal, the process moves from step ST12 to step ST30, the human detection establishment operation is started, the process proceeds to step 31, and the duct motor (41) is turned on. When driving, the duct motor (41) is stopped and the blowout duct (1
6) Stop.

After that, move to step ST32, both fans (12e, 12f)
If it is stopped, after driving both the fans (12e, 12f), the process proceeds to step ST33, and this step ST33 is to prevent continuous stoppage of the compressor (12a) like step ST7 described above. After the compressor (12a) is stopped, it is determined whether or not 3 minutes have elapsed. If 3 minutes have elapsed, step ST
If the compressor (12a) is started or is being driven, the process proceeds to step 34 and continues to drive as it is, and then proceeds to step ST36.
Before 3 minutes have passed, move to step ST35 and compressor (12a)
With step stopped, the process proceeds to step ST36.

Then, after resetting each timer (TM1 to TM4) in this step ST36, it moves to step ST37, sets the person detection flag (HKF) to "1", moves to step ST38, and sets the person undetected flag (MKF). After resetting, the process returns to step ST3.

Then, in step ST11, the human detection flag (HK
Since (F) stands (step ST37), the determination is NO, the process moves to step ST39, it is determined whether or not the human movement condition is satisfied, and the movement signal is output in step ST110 and step ST115 described above. If it is determined whether or not the person to be air-conditioned does not move, the process returns to step ST30,
The operations of steps ST3, ST11, ST39 and ST30 to ST38 are repeated at a predetermined timing.

That is, for example, during the search for the person to be air-conditioned in step ST17, if the person detection sensor (9) detects the person to be air-conditioned, the rotation of the blow-out duct (16) is stopped in step ST31, and the blow-out duct (16) is stopped. Is directed to the person to be air-conditioned, and cold air is blown to the person to be air-conditioned to perform local cooling.

Further, during the long-term standby in steps ST22 to ST27, when the person to be air-conditioned enters the monitoring area of the human detection sensor (9), the process proceeds from step ST12 to step ST30 as described above, and the compressor (12a) and the fan (12e , 12f) to blow cool air to the person to be air-conditioned.

Next, a case will be described in which the person subject to air conditioning moves during the person detection establishment operation (see FIG. 14).

First, when the movement detection signal is output from the input detection sensor (9) in steps ST108 and ST110 described above,
In ST39, it is determined that the person moving condition is satisfied, the process proceeds from step ST39 to step ST40, and the first timer (TM1) is incremented, and then the process proceeds to step ST41, and the first timer (TM1)
Step up 1) whether the elapsed preset delay time (t ₁₎ is determined, the delay time (t ₁₎ has elapsed
You will return to ST3. This delay time (t ₁ ) is, for example, 1
It is set to seconds, and the person to be air-conditioned has a human detection sensor (9).
When returning from the monitoring area of No. 3 and immediately returning, the blowout duct (16) is prevented from moving and the current state is maintained for 1 second.

After that, when the above delay time (t ₁ ) elapses, the step
It moves from ST41 to step ST42, and it is determined whether the person to be air-conditioned has moved to the right or to the left, and based on the output signal of the human detection sensor (9), the above-mentioned step ST
When the right movement signal is output at 110, the process proceeds to step ST43, and when the left movement signal is output at step ST108, the process proceeds to step ST44.

Therefore, first, the case of this right movement will be described. In step ST43, it is determined whether or not the blowing duct (16) has rotated to the right end limit position, and if it has not rotated to the right end limit position, Since it can be rotated rightward, the process proceeds from step ST43 to step ST45, and the duct motor (41) is rotated to rotate the outlet duct (16) rightward.

Then, in step ST46, the first timer (TM1) is reset, and in step ST47, the human detection flag (HK
After resetting F), the process returns to step ST3.
Then, since the human detection flag (HKF) is reset, the determination in step ST11 becomes YES, and once the above-described operations of steps ST30 to ST38 are performed, the process returns to step ST40, and the delay time (t ₁ ) If the person to be air-conditioned is still moving to the right in the process, the outlet duct (16) is rotated to the right in step ST45.

On the other hand, the same applies when the person to be air-conditioned is moving to the left. From step ST42 to step ST44, it is determined whether or not the blowing duct (16) has rotated to the left end limiting position, and the left end limiting is performed. If not rotated to the position, the process proceeds from step 44 to step ST48, the duct motor (41) is rotationally driven in the opposite direction to rotate the outlet duct (16) leftward, and then the process proceeds to step ST46. The same operation as the above-described clockwise rotation is performed.

That is, when the person to be air-conditioned moves left and right in the air-conditioning area formed by the blow-out duct (16), the human detection sensor (9) identifies the moving direction, and steps ST45 and ST48.
, The duct motor (41) is rotated in the forward and reverse directions to rotate the outlet duct (16) to follow the movement of the person to be air-conditioned to perform human tracking.
The cold air will continue to be blown to the moving air-conditioned person.

On the other hand, in steps ST43 and ST44,
When the outlet duct (16) is rotated to the right end limit position or the left end limit position, the outlet duct (16) cannot be rotated in the same direction even if the air-conditioned person further moves in the same direction, so from step ST43. In step ST49, or from step ST44 to step ST50, the fourth timer (TM4) is incremented.

After that, the process moves from step 49 to step ST51 and from step ST50 to step ST52, respectively, and from step ST51 or step ST52 to step ST3 until the fourth timer (TM4) passes a preset stop time (t ₄ ). And the blowing duct (16) is stopped at each end restriction position until the stop time (t ₄ ) elapses.

Then, when this stop time (t ₄ ) elapses, the process proceeds from step ST51 to step ST48, and from step ST52 to step ST45, and the blowing duct (16) is rotated in the opposite direction to step ST46. Is performed.

In other words, when the person to be air-conditioned moves away from the end of the air-conditioning area,
Since there is a high possibility of returning from the end, stop at each end limiting position of the blowout duct (16), and if an air-conditioned person is detected within this stop time (t ₄ ), step ST39 once returns to step ST30. If the person to be air-conditioned does not return, the outlet duct (16) is rotated in the opposite direction, and the person detection signal is output in step ST12 as described above. Will be determined.

After that, after performing the short-term standby operation and the search operation (steps ST13 to ST21) as described above, the long-term standby operation (steps ST22 to ST29) is performed. Become.

In the above-described embodiment, since the person is detected only by determining whether or not the output of the person detection sensor is equal to or greater than the installation value, it is not possible to accurately distinguish the human body (person to be air-conditioned) from the specular reflection object.
Therefore, in order to make the distinction, the following control may be performed.

As shown in FIG. 19, when starting, first, in step ST201, drive the blowout duct (16), and then in step ST202, it is judged whether or not the output of the human detection sensor (9) is equal to or more than a set value Hs _2. To do.

If the set value is Hs ₂ or more, some reflective object is detected, and therefore in order to determine whether it is a mirror surface or an air conditioner (human body), a predetermined angle is further determined in step ST203. The outlet duct (16) is rotationally driven by 2θ ₂ degrees, and in step ST204, the human detection sensor (9) determines whether or not the output is continuously the set value Hs ₂ or more. On the other hand, if it is not the set value Hs ₂ or more in step ST202, the outlet duct (1
Since it is determined that no reflector exists in front of 6), the process returns to step ST201.

If it is determined in step ST204 that the set value is Hs ₂ or more, it is determined that the reflective object is the person to be air-conditioned, so step ST204
At 205, reverse the outlet duct (16) by a predetermined angle θ ₂ degrees,
The air outlet duct (16) is located almost at the center of the human body of the air conditioning worker, and it is determined in step ST206 that a person is detected. If it is not the set value Hs ₂ or more, it is determined that the reflector is a mirror surface, and the process returns to step ST201.

Here, the human body (clothes) and the mirror surface are distinguished from each other by utilizing their directivities. That is, in the case of the mirror surface, the directivity angles of the infrared light emitting element and the infrared light receiving element are sharp, and the output range is narrow as shown in FIG. 20. Due to the diffuse reflection component, the range in which the output can be obtained is widened as shown in FIG. 21, and in the case of an air-conditioning operator, the output of the human detection sensor (9) is spread over an angular range exceeding a predetermined value. ,
When the output of the human detection sensor (9) exceeds a predetermined value, the human detection sensor (9) is detected not only at the angular position but also at an angular position where the outlet duct (16) is further rotated by a predetermined angle (2θ ₂ ). Is detected, and if the output exceeds a predetermined value at both angular positions, it is determined that the operator is an air conditioning worker.

Subsequently, the processing steps ST207 to ST213 after determination of the human detection in step ST206 are the above-mentioned processing steps ST104 to S
The same processing as T110 is performed.

In the above embodiment, the human detection sensor (9) is arranged at the tip of the blowing duct (16), and the duct driving means (2) is driven to scan the blowing duct (16) as it scans. When it is detected, the air outlet duct (16) faces the person to be air-conditioned, but a person detection sensor is rotatably provided regardless of the air outlet duct (16), and the Based on the detection signal, the outlet duct (1
The outlet duct (16) so that 6) faces the person to be air-conditioned.
You may make it control the rotation of.

In addition, this embodiment is a movable spot air conditioner (1)
However, the present invention may be applied to a duct type spot air conditioner. Further, two or more blowout ducts (16) may be provided, and the blowout ducts (16) are provided in the housing (1
5) may be pivotally supported by a pin or the like for rotation.

(Effect of the invention) In the invention of claim 1, the drive control means detects the stop and movement of the person to be air-conditioned by the change in the signal output from the person detecting means due to the slight rotation of the blowing duct, and the blowing duct accordingly. Is controlled to cause the blowout duct to track a person, the person to be air-conditioned can be reliably detected, and the air-conditioning control can be efficiently performed. Further, since the person detecting means can be configured by one infrared light emitting element and one infrared light receiving element, the structure is simplified and the cost can be reduced.

According to the invention of claim 2, since the person detecting means can be scanned by the duct driving means of the blowout duct, it is possible to reliably monitor the inside of the air conditioning area without providing a special scanning means for the person detecting means.

According to a third aspect of the present invention, when the signal from the person detecting means is received and the signal output is equal to or more than a set value, the blowing duct is set at a predetermined angle (2θ).
₂ ) When rotating, and the signal output at that time is equal to or more than the set value, the blowout duct is reversed by a predetermined angle (θ ₂ ) and it is determined that a person is detected, and the above-mentioned blowout duct is further rotated by a predetermined angle (± θ ₁ ).
Only a slight rotation, the stop and movement of the person to be air-conditioned is detected by the change in the above signal output, and the blowing duct is controlled to track the person to be air-conditioned. It is possible to surely distinguish the object.

Further, since the blow-out duct is reversed by a predetermined angle (θ ₂ ) prior to the determination of human detection, the blow-out duct can be directed substantially to the human body center of the air conditioning worker.

[Brief description of drawings]

1 shows a control block diagram of a spot air conditioner, FIG. 2 is a cross sectional front view of a spot air conditioner, FIG. 3 is a longitudinal side view of the same, and FIG. 4 is a duct drive means. FIG. 5 is an enlarged vertical sectional view, FIG. 5 is a plan view of the blowing duct and the duct driving means, FIGS. 6 and 7 are plan views and longitudinal sectional views of the cover member, FIG. 8 is a plan view of the casing, and FIG. FIG. 10 is a sectional view of a connecting structure between a motor and a timing pulley, and FIG. 10 is a sectional view of an upper shaft. FIG. 11 is an explanatory view of the mounting position and directivity angle of the human detection sensor,
12 to 14 are control flow charts showing the air conditioning process of the spot air conditioner. FIG. 15 is a control flow chart showing signal processing of the human detection sensor, and FIGS. 16 to 18 are explanatory diagrams of signal output of the human detection sensor. FIG. 19 is a view similar to FIG. 15 of the modified example, and FIGS. 20 and 21 are explanatory views of signal output of the human detection sensor in the case of a mirror surface and cloth. 1 …… Spot air conditioner 2 …… Duct drive means 9 …… Person detection sensor (person detection means) 10 …… Drive control means 12 …… Air conditioner main unit 16 …… Blowout duct

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-1-222135 (JP, A) JP-A-62-186161 (JP, A) JP-A-1-244229 (JP, A)

Claims (3)

(57) [Claims] 1. An air conditioner main body (12) for sucking indoor air to generate conditioned air, and a rotatable blowing duct (16) attached to the air conditioner main body (12) for blowing out the conditioned air. A spot air conditioner (1) having a duct drive means (2) for rotationally driving a blowout duct (16), comprising an infrared reflection type sensor having one infrared light emitting element and one infrared light receiving element to detect a person to be air-conditioned. And a signal from the person detecting means (9) for receiving a signal from the person detecting means (9), and when the signal output is equal to or more than a set value, the blowing duct (16) is set at a predetermined angle (±
a drive control means (10) for making a slight rotation by θ ₁ ), detecting the stop and movement of the air-conditioned person based on the change in the signal output, and controlling the blowing duct (16) to track the air-conditioned person. Spot air conditioner characterized by that. 2. The spot air conditioner according to claim 1, wherein the person detecting means (9) is arranged at the tip of the blowout duct (16). 3. An air conditioner body (12) for sucking indoor air to generate conditioned air, and a rotatable blower duct (16) attached to the air conditioner body (12) for blowing out the conditioned air. A spot air conditioner (1) having a duct driving means (2) for rotationally driving a blow duct (16), comprising an infrared reflection type sensor having one infrared light emitting element and one infrared light receiving element. ), Which is disposed at the tip of the air conditioner and detects a person to be air-conditioned (9)
When the signal from the person detecting means (9) is received and the signal output is equal to or more than a set value, the outlet duct (16) is rotated by a predetermined angle (2θ ₂ ) and the signal output at that time is equal to or more than the set value. Then, the blow-out duct (16) is reversed by a predetermined angle (θ ₂ ) to determine that a person is detected, and the blow-out duct (16) is moved at a predetermined angle (±).
a drive control means (10) for making a slight rotation by θ ₁ ), detecting stop and movement of the person to be air-conditioned based on the change in the signal output, and controlling the outlet duct (16) to track the person to be air-conditioned. Spot air conditioner characterized by that.