JPH0820096B2 - Spot air conditioner - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a spot air conditioner for performing local cooling or the like, and in particular, drives and controls a blowing duct based on a human detection signal from a human detection means to control a wind direction. It concerns spot air conditioners.

(Prior Art) Generally, in various factories and the like, a pot air conditioner for local cooling is provided to improve a working environment.

Such a spot air conditioner is, for example, the actual Kaisho Sho 61-10.
As described in Japanese Patent No. 1333, a refrigerant circuit including a compressor, a condenser, an evaporator and an expansion mechanism is housed in a housing mounted on a wagon, and a condensing fan and an evaporating fan are housed. The cold air that has undergone heat exchange in the evaporator is blown toward the worker from a blowing duct connected to the upper portion of the housing to perform local cooling. Further, the blow-out duct is connected to a swing cylinder, which is pivotally supported by a housing by a diametrical pin, and a motor is connected 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 air conditioning does not provide any comfort. 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 has developed a spot air conditioner that detects the person to be air-conditioned by the human detection means and moves the blowout duct following the movement of the person to be air-conditioned to improve comfort by air conditioning. Applying (Japanese Patent Application No. 63-293079)
No.).

(Problems to be solved by the invention) However, in such a spot air conditioner, since the human detection means is configured by combining a light emitting element and a light receiving element, the LED drive current sufficiently flows due to the heat generation of these elements. However, there was a restriction on the human detection distance.

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 increasing the human detection distance by cooling the human detection means.

(Means for Solving the Problem) In order to achieve the above object, as shown in FIG. 1, the invention of claim (1) provides a light emitting element (H ₁ ), (H ₂ ) and a light receiving element (J ₂ ). ), The blowout duct (16) based on the human detection signal from the human detection means (8).
In the spot air conditioner (1) for rotating the, the person detecting means (8) is provided with a cooling means (9) for cooling with the cooling air of the spot air conditioner (1).

According to the invention of claim (2), as shown in FIG. 2, the person detecting means (8) includes a blowing duct (1) through a supporting member (65).
The cooling means (9) provided on the support member (6)
5) The cooling air passage (68) protruding from the outlet duct (16)
It is composed of a cooling fin (65b) facing the.

In the invention of claim (3), as shown in FIG. 12, the person detecting means (8) is provided adjacent to the cooling air passage (97) of the blowout duct (16), and the cooling means (9) is Cooling air passage (97)
It is composed of a bypass passage (95) that branches off from and flows a part of the cooling air.

According to the invention of claim (4), the bypass passage (95) blows cooling air from the discharge port (92a) directed to the front surface of the detection window portion (92b) of the human detection means (8). There is.

(Operation) According to the invention of claim (1), in the cooling means (9),
The cooling air of the spot air conditioner (1) cools the person detecting means (8).

According to the invention of claim (2), the support member (65) is cooled by the cooling fin (65b), and the person detecting means (8) is cooled through the support member (65).

According to the invention of claim (3), the human detection means (8) is cooled by the cooling air flowing through the bypass passage (95).

According to the invention of claim (4), the cooling air discharged from the discharge port (92a) is detected by the detection window portion (92b) of the human detection means (8).
It is sprayed on the front surface of the to remove dust from the detection window (92b).

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

As shown in FIG. 3 and FIG. 4, (1) is a spot air conditioner, which is provided in various factories or the like and blows cool air to an air conditioning target person such as an operator to perform local cooling.

The spot air conditioner (1) is configured so that an air conditioner body (12) is mounted on a wagon (11) having casters (11a) and is movable, and the wagon (11) has an upper stage portion (11b).
And the lower part (11c). And
The air conditioner body (12 is a compressor (12a), a condenser (12b),
An expansion mechanism (not shown) and an evaporator (12c) are provided with a refrigerant circuit (not shown) connected by a refrigerant pipe, and the compressor (12a) is attached to the lower part (11c) of the wagon (11). The compressor (1) is installed in the lower part (11c) of the wagon (11).
2a), drain tank (13) and electric box (14)
Etc. are housed and installed in the housing (15) of the air conditioner body (12).

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 drive of both fans (12e) and (12f) exchanges heat in the condenser (12b) and becomes warm air, which is above the exhaust port (15b). While being discharged, the indoor air that has flowed in from the other side of the housing (15) exchanges heat in the evaporator (12c) to become cool air, and is blown out from the blowout duct (16) toward the person to be air-conditioned. There is.

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). .

As shown in FIGS. 5 and 6, the duct drive means (2) rotates with the drive mechanism (4) in the casing (3) attached to the upper plate (15a) of the housing (15). The mechanism (5) is housed and configured. The casing (3) is formed into a flat box body having an open lower surface, and the side walls (31) and (32) are flat on the right half of the plan view of FIG. 6 with the cold air blowing side (the side of FIG. 6A) as the front. ), (33), a drive mechanism housing (21) and a rotation mechanism housing (22) surrounded by a substantially semicircular side wall (34) are formed in the left half of FIG. , The side wall (32), (33), (34) the lower end flange (3
It is fixed to the casing (3) housing (15) at a).

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 adjacent to the opening (35a), and is continuous with the front side wall (34) by the guide wall (36) and the upper end of the front side wall (34) of the rotating mechanism (5). It constitutes the annular guide portion (37). Further, a plurality of fixing means for fixing the lower receiving plate (23) and the motor mounting plate (24) of the drive mechanism (4) and the rotating mechanism (5) to the side walls (31) to (34) and the guide wall (36). The individual fixed columns (38), (38), ... Are formed continuously,
The lower receiving plate (23) is provided with an opening (23a) communicating with the discharge port of the evaporation fan (12f). The opening (23
a) is formed concentrically with the opening (35a) of the upper surface wall (35), and is bent upward at the periphery of the opening (23a) of the lower receiving plate (23) to form an annular folded piece (23b). Is formed in an L shape.

As shown in FIG. 7, the drive mechanism (4) is formed by connecting a worm gear (42) and a belt transmission mechanism (43) to a geared motor (41), and the geared motor (41) has a motor body (41a). The motor shaft is fixedly supported by the motor mounting plate (24), and the drive shaft (41b) is horizontally installed so as to be parallel to the upper wall (35), and the thickness of the motor body (41a) (vertical direction in FIG. 5). The height of the casing (3) is formed corresponding to the height.

The worm gear (42) has the worm (42a) fitted and fixed to the drive shaft (41b), and the worm (4a).
A worm wheel (42b) meshing with 2a) is provided by being fitted to the shaft (44) by utilizing the gap formed by the semicircular guide wall (36) and the flat right side wall (33). ing. The shaft (44) has bearings (44) on an upper support plate (45) and a lower support plate (23) fixed to the left side wall (33).
It is supported in the vertical direction via a) and (44a), and the worm wheel (42b) is fixed to the upper part. Further, the shaft (44) has a flange (44b) at the lower end.
The timing pulley (46) of the belt transmission mechanism (43) is fitted and placed on the timing pulley (46). The timing pulley (46) has a toothed portion formed on the outer peripheral surface thereof and has a toothed belt (47).
And a compression spring (48) between the recess (46a) in the inner peripheral portion and the worm wheel (42b).
The timing pulley (46) is pressed against the flange (44b) of the shaft (44) by the spring force of the compression spring (48), and the timing pulley (46) is attached to the shaft (44). It is fitted so that it can slip.

On the other hand, the rotating mechanism (5) is formed by connecting the blowout duct (16) 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 (51) facing the opening (35a) is provided on the inner peripheral portion of the upper end surface of the rotary cylinder body (51a).
While b) is continuously formed on the upper side, belt-like protrusions (51c) are formed on the outer peripheral surface of the upper portion and tooth portions (51d) are formed on the outer peripheral surface of the lower portion, and the belt portion is formed on the tooth portion (51d). Transmission mechanism (4
The belt (47) from 3) is hooked.

Further, the upper end surface and the upper surface wall (3
An upper thrust seat (53) is provided between the lower thrust sheet (53) and the lower support plate (23), and the rotary cylinder body (51a) is connected to the lower portion. Support plate (2
The upper and lower end surfaces are sealed by being pressed upward by the spring force of 3). Further, an upper radial seat (5) is provided between the upper outer peripheral surface of the rotary cylinder body (51a) and the annular guide portion (37).
5), however, lower radial seats (56) are provided between the lower inner peripheral surface and the folded pieces (23b).

Furthermore, three mounting flanges (57) for fixing the elbow (52) are provided on the inner peripheral surface of the upper part of the rotary cylinder body (51a).
(57), (57) are projected, and the mounting flange (5
7), (57) and (57) are provided at unequal intervals such as 130 ° and 100 °. The elbow (52) extends obliquely forward and upward from the rotary cylinder (51), the lower end is fitted to the annular extension piece (51b) of the rotary cylinder (51), and the blow duct is provided at the upper end. (16) is fitted. And, the elbow (52) is fixed column (5
8), (58), (58) and the above mounting flanges (57), (5
7) and (57) are fixed to each other with screws or the like and are connected to the rotary cylinder (51).

On the other hand, on the guide wall (36), as shown in FIG.
A notch (6) is formed in the lower part, and a stopper (61) facing the notch (6) is projected on the outer peripheral surface of the upper part of the rotary cylinder body (51a). Then, the both end surfaces of the notch (6) are stop surfaces (61a), (61a) with which the stopper (61) abuts.
The rotation cylinder (51), that is, the blowout duct (16) is forcibly restricted by the notch (6) and the stopper (61), and the rotation range thereof is For example, it is set to 110 degrees.

Further, a first limit switch (7a) and a second limit switch (7b) for restricting the automatic swing range (air conditioning area) of the blowout duct (16) are provided in front of the motor body (41a). . Both limit switches (7a), (7
b) is composed of a microswitch or the like and is provided by utilizing a gap formed by the semicircular guide wall (36) and the flat right side wall (32). It is attached to the support piece (39) connected to 32) so as to be superposed in two steps. And the above limit switches (7a),
The probes (71a) and (71b) of (7b) are vertically arranged on the outer peripheral surface of the rotary cylinder body (51a) below the stopper (61).
It is provided so as to make contact at some point.

On the other hand, on the outer peripheral surface of the rotary cylinder body (51a), as shown in FIGS. 9 and 10, the probe (71a),
A first protrusion (62) and a second protrusion (63) with which (71b) abuts are provided. The protrusions (62) and (63) are formed in the axial direction (vertical direction) of the rotary cylinder body (51a), and the first protrusion (62) limits the right end of the automatic swing range of the blowout duct (16). The second protrusions (63) are provided at the left limit position. Further, the first protrusion (62) is formed to be longer than the second protrusion (63), and the first protrusion (62) is connected to the probes (71a) of both limit switches (7a) and (7b).
The second protrusion (63) is formed so that only the probe (71b) of the second limit switch (7b) comes into contact therewith so that (71b) comes into contact therewith.
The gard motor (41) is controlled to rotate normally and reversely by a) and (7b) so that the blowout duct (16) swings. The automatic swinging range is slightly larger than the range of rotation by the notch (6). Small, for example set to 100 degrees.

On the other hand, a sensor housing casing (64) for housing one human detection sensor (8), which is a human detection means for detecting the person to be air-conditioned in the front, is attached to the upper end of the outlet duct (16).

As shown in FIG. 11, the human detection sensor (8) includes a pair of light emitting elements (H ₁ ) and (H ₂ ) fixed to a support member (65) at an opening angle of a predetermined angle θ _3. , In the center of the pair of light emitting elements (H ₁ ), (H ₂ ), that is, both elements (H ₁ ),
(H ₂ ) and a light-receiving element (J) fixed to the support member (65) so as to have constant set angles θ ₁ and θ ₂ , respectively. The light-emitting elements (H ₁ ) and (H ₂ ) Reflection of the emitted infrared rays is detected by the light receiving element (J). However, in the present embodiment, θ ₁ = θ ₂ = θ, and therefore θ ₃ = 2θ.

As shown in FIG. 1, the elements (H ₁ ), (H ₂ ), and (J) are connected and attached to a printed circuit board (66), and the printed circuit board (66) serves as a support member (65). The support member (65) is attached to the rear of the upper surface of the board (65a), and the support member (65) is
It is attached to the upper side of the cylindrical portion (67a) of the rear member (67) which constitutes the casing (64) fitted in the front portion of (6). The support member (65) has a plurality of cooling fins (65b) projecting from the lower portion of the base (65a) (see FIG. 2), and the cooling fins (65b) extend from the blow-out duct (16) in the cooling air passage (6).
8) It is exposed inside and can be cooled by cooling air. Further, the support member (65) has a mounting portion (65c) projecting from the front upper side of the base portion (65a), and the element (H ₁ ) is provided in a mounting hole (65d) provided in the mounting portion (65c). , (H ₂ ), (J)
Is inserted and faces the detection window portion (69a) formed on the front member (69) of the casing (64) and made of acrylic resin. Note that (70a) and (70b) are control circuits that respectively configure a light emitting means and a light receiving means.

Therefore, the cooling fins are cooled by the cooling air flowing through the cooling air passage (68), the human detection sensor (8) is cooled via the support member (65), the driving current is prevented from decreasing, and the human detection distance is increased. It can be secured.

Here, each of the light emitting elements (H ₁ ) and (H ₂ ) has a predetermined directivity angle ± θ _H , that is, the direction in which the intensity of infrared rays emitted is equal to or higher than a certain level is a certain angle ± θ _H.
It has a directivity that is limited to within.
Similarly, the light receiving element (J) also has a directivity in which the range of the light incident direction in which infrared rays can be detected is limited to a predetermined directivity angle ± θ _J. The relationship between the set angle θ and the directional angles ± θ _H , ± θ _J is set so that θ _H <θ <θ _H + θ _J.

That is, as shown in FIG. 12, both light emitting elements (H ₁ ),
Infrared emitted from the light emitting element (H ₁ ) or (H ₂ ) because the positional relationship between (H ₂ ) and the light receiving element (J) is such that the directional angles of both ± θ _J and ± θ _H overlap each other. There is at least one smooth plane such that the light is reflected in the range of the light receiving element (J) directivity angle ± θ _J , and the directivity angles of both light emitting elements (H ₁ ) and (H ₂ ) The ranges of ± θ _H do not overlap with each other, and both light emitting elements (H ₁ ),
There is no smooth plane where infrared rays from (H ₂ ) are simultaneously reflected by the light receiving element (J).

That is, the infrared rays emitted from the pair of light emitting elements (H ₁ ) and (H ₂ ) and reflected by one smooth plane forming the surface of the specular reflector (M) are simultaneously set on the light receiving element (J) by the set value. Vs
In order not to let in light with the above intensity, that is, the 13th
As shown in the figure, infrared rays from any of the light emitting elements (H ₁ ) and (H ₂ ) are not input to the light receiving element (J), or
As shown in FIG. 14, only infrared rays from _one light emitting element (for example, H ₁ ) are input.

On the other hand, as shown in FIG. 15, an object that causes diffuse reflection, that is, the clothes (Cl) of the person to be air-conditioned extends over the directivity angles ± θ _H region of both light emitting elements (H ₁ ) and (H ₂ ). When present, due to diffuse reflection on the surface, the infrared rays from both light emitting elements (H ₁ ) and (H ₂ ) simultaneously enter the light receiving element (J) at a set value Vs or higher, and one of the light emitting elements (eg,
Orientation angle of H ₁ ) ± θ There is a part of clothes (Cl) in the _H region, but the orientation angle of the other light-emitting element (H ₂ ) is ± θ _H
In the case where a part thereof does not exist in the area, only the infrared ray from the light emitting element (H ₁ ) is input to the light receiving element (J) with the intensity of the set value Vs or more. Furthermore, the 16th
As shown in the figure, the clothing (Cl), that is, the movement of the person to be air-conditioned is identified by the order of receiving infrared rays from both light emitting elements (H ₁ ) and (H ₂ ).

Then, as shown in FIG. 13, in the case where the center line of the light receiving element (J) is orthogonal to the wall glass or the like serving as the background, and the background is the specular reflector (M), as shown in FIG. Also, the infrared rays emitted from both the light emitting elements (H ₁ ) and (H ₂ ) and then reflected by the specular reflector (M) are not reflected within the detection range of the light emitting element (J). .

FIG. 17 shows a control block diagram of the spot air conditioner (1). The human detection signal output from the human detection sensor (72) and the like are A / D converters (74) included in the control unit (73). It is configured to be converted into a digital signal by and input to the CPU (75). Further, the position signals output from the limit switches (7a) and (7b) are input to the CPU (75), and the blowing duct (16) is set to a fixed mode, an automatic swing mode, and a person tracking mode. The mode signal output from the mode selector switch (76) for switching to is input. In addition, the control unit (73) is provided with a memory (77) including a ROM that stores in advance program data for realizing a control flow described later and a RAM that stores processing data, connected to the CPU (75). The storage area of the RAM in the memory (77) includes a sensor flag (STF), a person detection flag (HKF) and a person non-detection flag (MKF), while the control unit (7
Although not shown, 3) includes various timers (TM1) to (TM4).

Furthermore, the control unit (73) includes a right rotation drive circuit (78) and a left rotation drive circuit (79) for the geared motor (41), and a first relay (RY1) constituting an air conditioning control means (72). ) And a relay drive circuit (80) for the second relay (RY2) are connected to the CPU (75).

The geared motor (41) drives the right rotation and left rotation drive circuits (78) based on the output signal of the CPU (75).
(79) controls forward / reverse rotation, while both relays (RY
1) and (RY2) are configured to be ON / OFF controlled by the relay drive circuit (80) based on the output signal of the CPU (75). Further, the fan control relay (X1) and the compressor control relay (X2) included in the air conditioning control means (8) are ON / OFF controlled by the both relays (RY1) and (RY2) to control the fan motor (12d). And the compressor motor (12h) are drive-controlled. The air conditioning control means (8) is configured to control the fans (12e), (12f) and the compressor (12a) to control the air conditioning operation.

FIG. 18 is a detailed circuit diagram of the control block diagram of FIG. 17, in which the power supply (81) has a stop contact (82a) and a blow contact (82).
b) and operation changeover switch (8c) with temperature control contact (82c)
2) via a series circuit in which the contact of the compressor control relay (X2), the overcurrent protection relay (83) and the compressor motor (12h) are connected in sequence, and the contact of the fan control relay (X1) and The fan motor (12d) is connected in parallel with a series circuit in which the fan motor (12d) is sequentially connected. Then, the transformer (Tr) is connected in parallel to the contact of the fan control relay (X1) and the series circuit of the fan motor (12d), and
A series circuit in which the right rotation drive circuit (78) and the left rotation drive circuit (79) in parallel with the triacs (78a) and (79a) are connected to the guard motor (41), and the first relay (RY
A series circuit in which the contact of 1) and the exciting coil of the fan control relay (X1) are connected, and a series circuit in which the contact of the second relay (RY2) and the exciting coil of the compressor control relay (X2) are connected Each is connected in parallel.

Further, the CPU (75) is provided with a geared motor (41) of the duct drive means (2) so that the blowout duct (16) faces the person to be air-conditioned in response to the person detection signal of the person detection sensor (8). The wind direction control means (75a) for controlling is constituted.

Next, the air conditioning control operation of this spot air conditioner (1) will be described based on the control flow shown in FIGS. 21 to 23. Regarding this control flow, the operation changeover switch (82) is set to the temperature control contact (82c), and in the following, the fixed mode in which the blowout duct (16) is fixed while facing in a fixed direction, and the blowout mode An automatic swing mode in which the duct (16) automatically swings and a person tracking mode in which the blowout duct (16) rotates following the movement of the person to be air-conditioned 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 fan is started. (12
e), (12f) and the compressor (12a) are driven. That is, C
The output signal of the PU (75) turns on the relay drive circuit (80) first and second relays (RY1), (RY2), and turns on the fan control and compressor control relays (X1), (X2). , The fan motor (12d) and the compressor motor (12h) are driven. After that, move from step ST2 to step ST3,
The mode is determined, and it is currently set to the fixed mode by the mode changeover switch (76), so move to step ST4, and stop if the geared motor (41) that rotates the blowout duct (16) is driven. After letting step
Moving to ST5, human detection flag (HKF), non-human detection flag (MK
F) and each timer (TM1) to (TM4) are reset. Then, in step ST6, if the fans (12e) and (12f) are stopped, turn on the fan control relay (X1) to drive it, then move to step ST7, and the compressor (12a) It is determined whether or not 3 minutes have elapsed after the stop. 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 operation from step ST3 to step ST9 is repeated,
The cold air is always blown out in a fixed direction. At that time, since the blowing duct (16) is a flexible pipe in the blowing direction,
An operator or the like manually bends the blowing duct (16) and sets 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 discriminated and the process proceeds to step ST10, where the geared motor (41) is driven and the blowout duct (1
6) Rotate back and forth. That is, the geared motor (4
The rotation of 1) is performed by the worm gear (42) and the belt transmission mechanism (4
3) is transmitted to the rotary cylinder (51), and the rotary cylinder (51)
And the outlet duct (16) rotates, and the probes (71a), (71) of the limit switches (7a), (7b) are rotated.
When b) contacts the protrusions (62) and (63), the rotation direction of the geared motor (41) is reversed. Specifically, when both limit switches (7a) and (7b) output by the first protrusion (62), the rotary cylinder (51) rotates counterclockwise in FIG. 6 and the blowout duct (16) While turning to the left, only the second protrusion (7b) has the second protrusion (63).
When output by, the rotary cylinder (51) rotates clockwise in FIG. 6, and the outlet duct (16) rotates rightward.

Then, move from step ST10 to step ST5,
The same operation as in the fixed mode is performed up to steps ST8 and ST9, and the process returns to step ST3. Then, the above-described operation is repeated, and the blowout duct (16) automatically swings to blow cold air into the air-conditioning region (100 degrees in this embodiment).

Next, the person tracking mode will be described. Therefore, first, the signal processing operation of the human detection sensor (8), 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. 19 and the control timing of FIG. First
FIG. 19 shows the control contents of the CPU (1), and step ST1
In 01, the light emitting element (H ₂ ) on the right side is turned on (see FIG. 20 (ii)) to emit infrared rays, and in step ST102, whether the output signal V ₂ of the light receiving element (J) is the set value Vs or more. To determine. If the set value is Vs or more, in step ST103, the left light emitting element (H ₁ ) is turned on (see FIG. 20 (i)) to emit infrared light, and in step ST104, the force V of the light receiving element (J) is V _It is further determined whether ₁ is the set value Vs or more.
If the determination is YES, it is determined that the person to be air-conditioned is present in front of the light receiving element (J), the person detection operation is started in step ST105, and the person detection signal is output in step ST106. , Both light emitting elements (H ₁ ) and (H ₂ ) in step ST107
After setting the sensor flag (STF) indicating that the signal from is simultaneously input to the light receiving element (J) to "1", the process returns to step ST101.

After that, the above flow is repeated, and the above step ST104
If the output V ₁ of the light receiving element (J) changes to NO, which is lower than the set value Vs, the person to be air-conditioned is outside the directional angle range ± θ _H of the light emitting element (H ₁ ) on the left side. In step ST108, it is determined whether or not the sensor flag (STF) is "1". If YES, it means that the person to be air-conditioned is present in front of the light receiving element (J). It is judged that the person is moving from the front to the right due to the change of, and step ST109
The air-conditioning target person starts the right movement operation in which the person has moved to the right, and outputs a right movement signal in step ST110.

On the other hand, when the output V ₂ of the light receiving element (J) is NO lower than the set value Vs in the determination in step ST102, the left light emitting element (H ₁ ) is turned on in step S110,
In step ST112, it is determined whether or not the output V ₁ of the light receiving element (J) is equal to or larger than the set value Vs. Then, if the determination result is YES, it is further determined in step ST113 whether or not the sensor flag (STF) is "1". If the sensor flag (STF) is "1", the person to be air-conditioned is in front of the light receiving element (J). When it is determined that the change is from the existing state, in step ST114, the person to be air-conditioned starts the left movement operation to the left, and in step ST115, the left movement signal is output.

In other cases above, that is, steps ST102 and ST112
Both of the light emitting elements (H ₁ ) and (H ₂ ) are NO in the judgment in
The output V ₁ and V _{2 of the} light receiving element (J) are set to the set value V even when the
If not more than s, or the above steps ST108, ST113
If the infrared rays from _one of the light-emitting elements (H ₁ or H ₂ ) enter when the determination in NO is not in the human detection state, the operation of step ST116 “No human detection” is started, and in step ST117. Outputs a person undetected signal.

Then, when the above flow is completed, the sensor flag (STF) is set to "0" in step ST118, the process returns to step ST101, and the above flow is repeated.

Subsequently, the control operation in the human tracking mode based on the signal processing operation of the human detection sensor (8) described above will be described with reference to FIGS. 21 to 23.

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 human tracking mode, so this human 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
Then, it is determined whether or not the above-mentioned person detection sensor (8) is outputting a person detection signal, and if the person undetection signal is being output at the above-mentioned step ST117, go to step ST13,
When the person detection signal is output in step ST105, the process proceeds to step ST30.

Therefore, when the person to be air-conditioned is not detected (see FIG. 22), the undetected person operation is started in step ST13, and
In ST14, it is determined whether or not the person undetected flag (MKF) is "0". Since the person undetected 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 geared motor (41) is driven to drive both limit switches (7a), as in the automatic swing mode described above.
In response to the output signal of (7b), the blowing duct (16) is swung. Next, in Step ST18, both fans (12
If e) and (12f) are stopped, drive and step
Moving to ST19, the compressor (12
3) after stopping the compressor (12a) to prevent continuous start / stop of a)
It is determined whether or not minutes have elapsed, and after 3 minutes, step ST20
When the compressor (12a) is started or driven, the drive is continued as it is, and after 3 minutes, the process moves to step ST21 and returns to step ST3 with the compressor (12a) stopped. Then, the above-mentioned steps ST11 to ST
The operations up to 21 will be repeated. Specifically, the short-term standby time (t ₂ ) is set to, for example, 5 minutes, and when the human detection sensor (8) does not detect the person to be air-conditioned, the compressor (12a) and the fan (12e), ( 12f) is driven to wait for 5 minutes for the person to be air-conditioned to enter the air-conditioning area while blowing cold air, and at the same time, the outlet duct (16) is rotated to search for the person to be air-conditioned in the air-conditioning area. There is.

After that, when the person to be air-conditioned cannot detect it before the short-term standby time (t ₂ ) elapses, the operation shifts to the long-term standby operation, and first, the process proceeds from step ST16 to step ST22 to stop the geared motor (41) and blow out the duct ( After stopping 16) to 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 the compressor (12a) are stopped. Then move to step ST24,
After resetting the second timer (TM2), the process proceeds to step ST25, the person undetected flag (MKF) is set to "1", then the process proceeds to step ST26, and the third timer (TM3) is stepped, and step ST27 Then, it is determined whether or not the third timer (TM3) has passed the preset long waiting time (t ₃ ). Then, until the long standby time (t ₃ ) elapses, the process returns from step ST27 to step ST3 and repeats the above-mentioned operation. 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 (8) 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, move to step ST29, the system will be down, and it will be done by restarting the power supply at the time of restart, and in the control flow step ST1
Will start more. That is, in the long-term standby operation, specifically, when the long-term standby time (t ₃ ) is set to, for example, 1 hour, and there is no person to be air-conditioned after the short-term standby time (t ₂ ) has elapsed, Compressor (12a) and fan (1
2e) and (12f) are stopped to stop blowing or blowing the cool air, and the blowing duct (16) is stopped at the center to wait for the person to be air-conditioned to enter. If there is no person to be air-conditioned even after one hour has passed, the entire system is stopped, and even if the person to be air-conditioned enters the monitoring area of the human detection sensor (8), the compressor (12a) etc. will automatically Never boots.

Next, in this human tracking mode, when the human detection sensor (8) outputs a human detection signal, the process proceeds to step ST30 from step ST12 (see FIG. 21), the human detection establishment operation is started, and the process proceeds to step 31. When the geared motor (41) is driven, the geared motor (41) is stopped and the blowout duct (16) is stopped. Then step
In ST32, if both fans (12e) and (12f) are stopped, drive both fans (12e) and (12f), and then move to step ST33, which is the same as step ST7 described above. Similarly, in order to prevent continuous start / stop of the compressor (12a), it is determined whether or not 3 minutes have elapsed after the compressor (12a) was stopped. If 3 minutes have elapsed, the process proceeds to step ST34. When the compressor (12a) is being started up or is being driven, it continues to be driven and moves to step ST36, while before 3 minutes have passed, it moves to step ST35 and moves to step ST36 with the compressor (12a) stopped. It will be. Then, after resetting each timer (TM1) to (TM4) in this step ST36, the process proceeds to step ST37, the human detection flag (HKF) is set to "1", the process proceeds to step ST38, and the human undetected flag (MKF). ) Is reset and the process returns to step ST3. After that, in step ST11, since the human detection flag (HKF) is set (step ST37), the determination is NO.
Then, the process proceeds to step ST39 (see FIG. 23), it is determined whether or not the person moving condition is satisfied, and the above-mentioned step ST110 is performed.
And it is determined in step ST115 whether or not the movement signal is output, and if the person to be air-conditioned does not move, step ST30
Return to step ST3, ST11, ST39 and ST3
The operation of 0 to ST38 is repeated at a predetermined timing.

That is, for example, when the person detection sensor (8) detects an air-conditioned person during the search for the air-conditioned person in step ST17, 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, if the person to be air-conditioned enters the monitoring area of the human detection sensor (8), the process proceeds from step ST12 to step ST30 as described above, and the compressor (12a) and the fan (12e ) And (12f) are driven 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. 23).

First, when the human detection sensor (8) outputs a movement signal in steps ST110 and ST115 described above, step ST
In step 39, it is determined that the conditions for human movement are satisfied, and the step
After shifting from ST39 to step ST40 and incrementing the first timer (TM1), the routine proceeds to step ST41 and the first timer (TM1)
1) it is determined whether or not a lapse of a preset delay time (t ₁₎ is a step ST until the delay time (t ₁₎ has elapsed
I will return to 3. The delay time (t ₁ ) is set to, for example, 1 second, and when the air-conditioned person leaves the monitoring area of the human detection sensor (8) and immediately returns, the blowing duct (16) is prevented from moving, The current status is maintained for 1 second.

After that, when the above delay time (t ₁ ) elapses, the step
From ST41 to step ST42, 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 (8), the above-mentioned step ST
When the right movement signal is output in 110, the process proceeds to step ST43, and when the left movement signal is output in step ST115, the process proceeds to step ST44. Therefore, first, the case of this right movement will be described.
In, 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, that is, the first protrusion (62) causes both limit switches (7a), When (7b) is not outputting, it is possible to rotate to the right. Therefore, the process proceeds from step ST43 to step ST45, and the geared motor (41) is rotated to blow the duct (1
6) Rotate to the right. Then, the process proceeds to step ST46, the first timer (TM1) is reset, the process proceeds to step ST47, the human detection flag (HKF) is reset, and then the process returns to step ST3. And human detection flag (HKF)
Since it has been reset, the judgment in step ST11 becomes YES, the operation in steps ST30 to ST38 described above is performed once, and then the flow returns to step ST40, and the person to be air-conditioned still has to move to the right after the delay time (t ₁ ). If it is moving in the direction, the blowing duct (16) is rotated rightward in step ST45.

On the other hand, when the person to be air-conditioned is moving to the left, the same is true, the process moves from step ST42 to step ST44, and it is determined whether or not the blowout duct (16) is rotated to the left end control position. If there is no output signal from the first limit switch (7a) due to the protrusion (63), step from step 44.
After moving to ST48, the geared motor (41) is rotationally driven in the opposite direction to rotate the blowout duct (16) to the left, and then proceeds to Step ST46, where the same operation as the above-described right 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 (8) identifies the moving direction, and steps ST45 and ST48 are performed.
Reverse the geared motor (41) in the direction of the outlet duct (16)
The person is tracked by rotating the person following the movement of the person to be air-conditioned, and the cold air is continuously blown to the person to be air-conditioned who is moving.

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, and the fourth timer (TM
4) returns from step ST51 or step ST52 to step ST3 until the preset stop time (t ₄ ) has elapsed,
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, from step ST51 to step ST48
Further, from step ST52 to step ST45, the outlet duct (16) is rotated in the opposite direction to step ST46,
The above operation 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 this end, the outlet duct (16) is stopped at each end restriction position, and when an air-conditioned person is detected within this stop time (t ₄ ), step ST39 once returns to step ST30. On the other hand, while the person tracking is performed as described above, if the air-conditioned person does not return, the blowing duct (16) is rotated in the opposite direction, and as described above, it is determined whether or not the person detection signal is output in step ST12. It will be decided. Then, as described above, the short-term standby operation and the search operation (steps ST13 to ST
After performing 21), a long-term standby operation (steps ST22 to ST29)
If the person to be air-conditioned returns during that time, the person will be tracked again.

Then, in these steps ST30 to ST52, the wind direction control means (75
a) is configured.

When the operation changeover switch (82) is set to the blow contact (82b), only the fans (12e) and (12f) are driven by the above control flow.

In the above embodiment, the cooling fins are used for cooling.However, as shown in FIG. 24, a bypass passage for bypassing the cooling air passage is formed and cooling is performed by the cooling air flowing through the bypass passage. Good.

That is, the printed circuit board (66) of the human detection sensor (8) provided with the light emitting elements (H ₁ ), (H ₂ ), the light receiving element (J), and the control circuits (70a), (70b) is a sensor housing portion, The sensor (9) is housed in the casing (91), and the sensor housing portion (91) includes a front member (92) and a rear member (93).
4) A rear side member (93) is connected at a side portion, and an opening (93a) is formed at a rear portion fitted into the blowout duct (16).

Further, on the upper side of the sensor accommodating portion (91), the cooling air passage (97) branches off from the opening (93a) to the front member (92).
Bypass passage (9a) communicating with the discharge port (92a)
5) has been formed. The discharge port (92a) is designed so that cooling air is blown toward the detection window portion (92b) exposed by each of the above-mentioned elements so that dust does not adhere to the detection window portion (92b). Has been done.

Therefore, the cooling air flowing through the bypass passage (95) cools the sensor housing portion (91), and the driving current is prevented from decreasing due to heat generation of the element.

Further, since the discharge port (92a) of the bypass passage (95) is directed to the detection window part (92b), the cooling air blown from the discharge port (92a) blows off dust in the detection window part (92a). As a result, the detection window portion (92b) is always kept clean, and the reduction of the human detection distance is prevented.

(Effect of the invention) In the invention of claim (1), since the cooling means cools the element, the element is prevented from being heated, and the human detection distance becomes long.

According to the inventions of claims (2) and (3), the person detecting means can be cooled with a simple structure.

According to the invention of claim (4), it is possible to prevent the dust in the detection window portion from being blown off and attached, so that it is possible to prevent a reduction in the human detection distance due to a decrease in sensitivity.

[Brief description of drawings]

The drawings show an embodiment of the present invention. Fig. 1 is a sectional view of the tip of a blowing duct, Fig. 2 is a view in the direction of arrow B of Fig. 1, and Fig. 3 is a lateral sectional front view of a spot air conditioner. FIG. 5 is a vertical side view of the same, FIG. 5 is an enlarged vertical sectional view of the duct driving means, FIG. 6 is a sectional view taken along line VI-VI of FIG. 5, and FIG. 7 is FIG. 6 VII-V.
A sectional view taken along line II, FIG. 8 is a sectional view taken along line VIII-VIII of FIG. 5, and FIG. 9 is a sectional view taken along line IX-IX of FIG.
FIG. 10 is a sectional view taken along line XX of FIG. 5, FIG. 11 is a sectional view of a human detecting sensor, FIG. 12 is an explanatory view showing a positional relationship between a light emitting element and a light receiving element, and FIG. 13 is a human detecting sensor. Fig. 14 is a diagram showing the propagation of infrared rays to the specular reflector of Fig. 14, Fig. 14 is a diagram showing the propagation of infrared rays to the same specular reflector, Fig. 15 is a diagram showing the propagation of infrared rays to the same clothes, and Fig. 16 is the same to moving clothes. Infrared propagation state diagram, Fig. 17 is a control block diagram of the spot air conditioner, Fig. 18 is a detailed circuit diagram of the same, Fig. 19 is a control flow diagram showing signal processing of a human detection sensor, and Fig. 20 is output of the same signal. Timing diagram, FIG. 21, FIG. 22 and FIG. 23 are control flow diagrams showing the air conditioning process of the spot air conditioner, FIG.
The drawing is similar to FIG. 1 for the modified example. 1 …… Spot air conditioner 8 …… Person detection sensor (person detection means) 9 …… Cooling means 16 …… Blowout duct 65 …… Supporting member 65b …… Cooling fin 68 …… Cooling air passage 92a …… Discharge port 92b …… Detection window 95 ...... Bypass passage 97 ...... Cooling air passage H ₁ , H ₂ …… Light emitting element J …… Light receiving element

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masashi Sagara 1304 Kanaoka-machi, Sakai City, Osaka Prefecture Daikin Industries, Ltd. Sakai Factory Kanaoka Factory

Claims (4)

[Claims] 1. A blow-out duct having a person detecting means (8) comprising light emitting elements (H ₁ ) and (H ₂ ) and a light receiving element (J), and based on a person detecting signal from the person detecting means (8). In the spot air conditioner (1) for rotating the (16), the person detecting means (8) is provided with a cooling means (9) for cooling with the cooling air of the spot air conditioner (1). Spot air conditioner. 2. A person detecting means (8) is provided in a blowout duct (16) through a supporting member (65), and a cooling means (9) is provided.
The spot air conditioner according to claim 1, wherein the spot air conditioner comprises a cooling fin (65b) projecting from the support member (65) and facing the cooling air passage (68) of the blowout duct (16). 3. A person detecting means (8) is provided adjacent to a cooling air passage (97) of an outlet duct (16), and a cooling means (9) is provided.
The spot air conditioner according to Claim (1), wherein the spot air conditioner is formed by a bypass passage (95) that branches from the cooling air passage (97) and through which a part of the cooling air flows. 4. The bypass passage (95) has a person detecting means (8).
The spot air conditioner according to claim (3), wherein cooling air is blown from a discharge port (92a) directed to the front surface of the detection window portion (92b).