JPH083380B2 - Spot air conditioner - Google Patents

Description

TECHNICAL FIELD The present invention relates to a spot air conditioner that performs local cooling or the like, and particularly relates to a person detection measure for driving and controlling a blowout duct.

(Prior Art) Generally, in various factories and the like, spot air conditioners for local cooling are provided to improve the working environment. In this spot air conditioner, as disclosed in Japanese Utility Model Publication No. 61-101333, a refrigerant circuit including a compressor, a condenser, an evaporator and an expansion mechanism is housed in a housing mounted on a wagon. In addition, a condensing fan and an evaporating fan are housed, and the cold air that has exchanged heat with the evaporator is blown toward the worker from a blowing duct connected to the upper part of the housing for local cooling. There is something.

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.

(Problems to be Solved by the Invention) In the above-mentioned spot air conditioner, since the blowout duct is simply swung around the pin and the position of the worker is not considered at all, it is different from the worker. In some cases, cold air may be blown out in the direction, which results in poor air conditioning efficiency and lack of comfort.

Therefore, it is conceivable to provide an infrared reflection type human detection sensor and control the motor so that the blowout duct is directed in the direction in which the human detection sensor detects the person.

However, since the light emitting unit of the human detection sensor emits infrared light at a fixed timing and the reflected light is received by the light receiving unit, for example, when two spot air conditioners are arranged facing each other, If the light emission timings match, one of the human detection sensors facing each other will erroneously detect the human detection sensor. as a result,
There may be a case where the blow-out duct cannot be accurately directed to the operator, which causes a problem of poor comfort.

The present invention has been made in view of such a point, so that it is possible to variably set the light emission timing of the human detection means,
The purpose is to prevent erroneous detection and improve comfort by air conditioning.

(Means for Solving the Problems) In order to achieve the above-mentioned object, means taken by the present invention are
As shown in FIG. 1, first, an air conditioner body (12) that sucks in the air in the air and generates conditioned air is provided. A blow duct (16) for blowing the conditioned air is rotatably attached to the air conditioner body (12), and the blow duct (16) is rotated with respect to the air conditioner body (12). A duct drive means (2) for changing the blowing direction is provided. Further, a light emitting unit (H) for emitting infrared light and a light receiving unit (J) for receiving reflected light of the infrared light are provided, and the light emitting unit (H) intermittently emits infrared light at predetermined preset timings. And a person detection means (7) for detecting a person to be air-conditioned in an air-conditioning area where the blow-out duct (16) rotates, and the blow-out duct (16) receives an air-conditioning air from the person detection means (7). Wind direction control means (82a) for controlling the duct drive means (2) so as to face the target person is provided. In addition, a light emission timing setting means (74) for changing the light emission timing of the light emitting section (H) in the human detection means (7) is provided.

The means taken by the invention according to claim (2) is the spot air conditioner according to claim (1), wherein the light emission timing setting means (74) is a power waveform of the AC power supplied from the power source (71). A zero-crossing detecting section (75) for detecting the zero-crossing point of the electric power waveform, and a light-emission timing section capable of changing plural kinds of light-emission timings based on the zero-crossing point detected by the zero-crossing detecting section (75) ( 76) and a switching setting section (77) for switching and setting the light emission timing of the light emission timing section (76).

Further, the means taken by the invention according to claim (3) is the spot air conditioner according to claim (1), in which the light emission timing setting means (74) sets a delay time settling section for setting the delay time of the light emission timing ( 78) and a light emission timing section (79) for setting a light emission timing based on the delay time set by the delay time setting section (78).

(Operation) With the above configuration, in the present invention, the air conditioner main body (12) sucks indoor air to generate conditioned air, for example, cool air or hot air is generated, and the cold air or the like is blown out from the blowing duct (16). There is. Then, the blowout duct (16) is rotated by the duct drive means (2), while the person detecting means (7) detects the person to be air-conditioned in the air-conditioning area, and the person detecting means (7) detects the person. Based on the signal, the wind direction control means (82a) rotates the blowout duct (16) toward the air-conditioned person.

In the detecting means (7), the light emitting section (H) intermittently emits infrared rays, and the reflected light is received by the light receiving section (J) to detect the person to be air-conditioned. It is set by the timing setting means (74).

Specifically, in the invention according to claim (2), the zero-cross point of the AC power waveform of the power source (71) is set to the zero-cross detection section (75).
The light emission timing section (6) has a plurality of light emission timings from this zero cross point, and the light emission timing is switched by the switching setting section (77).

In the invention according to claim (3), the delay time setting unit (78) sets the delay time of the light emission timing, and the light emission timing unit (9) sets the light emission timing on the basis of this delay time.

(Effect of the invention) Therefore, according to the present invention according to claim (1), since the light emission timing of the person detecting means (7) can be variably set, the infrared ray of another person detecting means (7) is received. Since it is possible to prevent the interference of infrared rays, it is possible to perform highly accurate air conditioning without erroneous detection. In addition, the person detecting means of the person detecting means (7) allows the outlet duct (1
Since 6) is directed to the person to be air-conditioned, the conditioned air can be reliably blown to the person to be air-conditioned. Since the person to be air-conditioned can reliably receive the air-conditioned air even if he or she moves due to various works, the comfort of air-conditioning can be significantly improved and the air-conditioning effect as local air-conditioning can be surely exhibited. it can.

Further, according to the invention of claim (2), since the AC power waveform of the power source is used, the light emission timing can be accurately changed only by the switching operation, and the interference can be reliably prevented. it can.

Further, according to the invention of claim (3), since the delay time is set, various kinds of light emission timings can be arbitrarily set, so that the variable setting range of the light emission timings can be expanded. it can.

(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, which blows cool air to the air conditioning target of the worker to perform local cooling. is there.

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), 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 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). .

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) is provided with a drive mechanism housing (21) surrounded by side walls (31), 32) and (33) in the right half portion, and the left half portion thereof is shown in FIG. A rotation mechanism storage section (22) surrounded by a substantially semicircular side wall (34) is formed in a half part, and between the drive mechanism storage section (21) and the rotation mechanism storage section (22) and The casing (3) is attached and fixed to the housing (15) at the four attachment boss portions (22a), (22b), (22c) and (22d) of the rotating mechanism housing portion (22) on the cold air blowing side. ing.

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). Mounting portions (64) and (64) for the are protruded.

Further, the first chamber (62) of the upper wall (65) of the cover member (3)
A plurality of slits (66) serving as air exhaust ports extending parallel to the partition wall (61a) are formed in the side portion, and a wall portion (projectingly provided with attachment portions (64) and (64) is formed in the lower portion ( Except for 61b), the other two walls (61c) and (61d) have air intakes (6
7) and (68) are opened adjacent to the exhaust port (15b). On the other hand, a recess (69) is formed in a portion of the upper wall (65) on the second chamber (63) side, and a knob (26a) of the internal setting switch plate (26) projects into the recess (69). Open hole (69
a) and (69a) have been opened.

The upper wall (35) of the casing (3) is provided with an opening (35a) through which the rotating mechanism (5) passes, and the inner wall (lower surface) of the upper wall (35) is rotated. Moving mechanism (5)
The guide wall (36) is formed so as to project slightly downward.
The guide wall (36) is close to the opening (35a) and is continuous with the front side wall (34), and is formed by the guide wall (36) and the upper end of the front side wall (34) to form an annular shape of the rotating mechanism (5). It constitutes the guide part (37). (38) is the mounting portion (64) of the cover member (61)
Is a fixed part of the casing (3) to which is attached.

Further, the side walls (31) to (34) and the guide wall (36) have a lower support plate (23) for the drive mechanism (4) and the rotation mechanism (5).
A plurality of fixed columns (not shown) for fixing the fan are continuously formed, and the lower receiving plate (23) has a fan (12) for evaporation.
An opening (23a) communicating with the discharge port of f) is provided.
The opening (23a) is formed concentrically with the opening (35a) of the upper surface wall (35), and the opening (23a) of the lower receiving plate (23) is formed.
An annular folded-back piece (23b) is formed in an L shape by being bent upward at the peripheral edge.

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. 11, the connecting shaft (42) includes a motor-side upper shaft (45) which is fixedly attached to the output shaft (41b) by a hexagon socket set screw (44), and a belt transmission mechanism (43). The timing pulley (46) is divided into two parts: a pulley side lower shaft (47) into which the timing pulley (46) is slidably fitted.

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. 12, the upper shaft (45) is composed of a large diameter part (45a) and a small diameter part (45b), and outputs from the large diameter part (45a) to the middle of the small diameter part (45b). A notch (45e) that is provided with a fitting insertion hole (45c) into which the shaft (41b) is fitted and that opens downward from the side end surface (45d) of the small diameter portion (45b) to the end of the fitting insertion hole (45c). Are formed. Then, the output shaft (41b) fitted into the fitting insertion hole (45c) has a screw hole (45b).
Pin member (49) fixed with set screw (44) screwed to f) and inserted into lower shaft (47) in notch (45e)
When the upper shaft (45) and the lower shaft (47) are connected to each other, both the shafts (45e) and the pin member (49) of the idling mechanism (7), which will be described later, are connected when the two shafts ( A universal joint mechanism (6) that absorbs the deviation of the axes of 45) and 47) is constructed.

Further, the lower shaft (47) on the pulley side is fitted and mounted on the flange (47b) at the lower end to mount the belt transmission mechanism (43).
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 pressed against the lower shaft (47).
Duct motor (41) that is slip-fitted against
The idling mechanism (4a) is constructed. In addition, (27B) is a relay harness.

On the other hand, in the rotating mechanism (5), the outlet duct (16) is connected to the rotary cylinder (51) via the elbow (52),
In the rotary cylinder (51), the upper part of the rotary cylinder main body (51a) is fitted to the annular guide portion (37), and the lower part is externally fitted to the folded piece (23b) of the lower support plate (23). It is supported vertically.

An annular extension piece (51b) facing 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 protrusion (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 upper part of the rotary cylinder body (51a) and the 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.

Furthermore, as shown in FIG. 9, three sets of mounting flanges (57A ₁ ) to (57A ₃ ), (57B ₃ ), (57B ₃ ) for fixing the elbow (52) are provided on the inner peripheral surface of the upper part of the rotary cylinder body (51a). ₁ ) ~ (57
B ₃ ), (57C ₁ )-(57C ₃ ) are projected, and the mounting flanges (57A ₁ )-(57A ₃ ), (57B ₁ )-(57
B ₃ ), (57C ₁ ) to (57C ₃ ) are composed of one set of three, and 130
They are provided at unequal angular intervals of °, 130 ° and 100 °.

That is, with the left side as the front, the outlet duct (1
6) As can be directed, one of the mounting flange (57A ₁₎ and mounting flange (57A ₁₎ alpha to the left and right with respect to _{1 =} alpha _{2 =} 130 DEG a mounting flange located opposite position ( 57A ₂ ), (57A ₃ ) are arranged to form a first group, and the mounting flanges (57A ₁ ) to (57A ₃ ) of the first group are
The second set of mounting flanges (57B ₁ ) to (57B ₃ ) have the same angular relationship and are offset by β ₁ = 40 ° on the left side.
However, the mounting flanges (57C ₁ ) to (57C ₃ ) of the _{third set} are respectively arranged on the right side in the same angular relationship and in a positional relationship in which the whole is shifted by β ₂ = 40 °.

Further, as shown in FIGS. 4 and 10, the elbow (52) extends obliquely forward and upward from the rotary cylinder (51), and the lower end portion thereof forms an annular extension piece (51b) of the rotary cylinder (51). The blowout duct (16) is fitted to the upper end of the fitting duct. Then, the elbow (52) is fixed to the lower inner peripheral surface in the same angular relationship as the mounting flanges (57A ₁ ) to (57A ₃ ) of the first to third sets of the rotary cylinder body (51a). Pillars (58),
(58) and (58) are bulged to form the fixed columns (58) and (5
8), (58) and the rotary cylinder or set of mounting flange of the main body _{(51a) (57A 1) ~} (57A 3), (57B 1) ~ (57B 3),
By connecting (57C ₁ ) to (57C ₃ ) with screws etc.,
It is fixed to the rotating cylinder (51). Therefore, it is possible to change the attachment direction of the blowout duct (16) and change the blowout direction from the blowout duct (16) according to the position of the person to be air-conditioned. A relay harness (27C) is provided on the upper side of the inner peripheral surface of the outlet duct (16) with a push rivet (59),
Installed by (59).

Further, one person detecting sensor (7), which is a person detecting means for detecting the person to be air-conditioned in the front, is attached to the upper end of the tip of the blowout duct (16), while the person detecting sensor (7) is attached to the rear of the rotary cylinder (51). A photo interrupter (9) for detecting the moving angle is attached to the casing (3). The human detection sensor (7) is, as shown in FIGS. 13 and 14, a pair of light emitting elements which are light emitting portions (H) fixed to the frame (7a) at an opening angle of a predetermined angle θ _3. (H ₁ ), (H ₂ ) and the 1
Fixed to the frame (7a) at the center of the pair of light-emitting elements (H ₁ ) and (H ₂ ), that is, with both elements (H ₁ ) and (H ₂ ) to have constant set angles θ ₁ and θ ₂ , respectively. The light receiving element (J), which is a light receiving section, is configured to detect the reflection of infrared rays emitted from the light emitting elements (H ₁ ) and (H ₂ ) by the light receiving element (J). However, in the present embodiment, θ ₁ =
θ ₂ = θ, and therefore θ ₃ = 2θ.

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. 14, 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. Is arranged so that at least one smooth plane exists so that the light is reflected within 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 in the light receiving element (J). value
Make sure that the light does not come in at an intensity higher than Vs, that is,
As shown in FIG. 15, 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. 16, one of the light emitting elements (for example, H ₁ ) From the infrared is only input.

On the other hand, as shown in FIG. 17, an object that causes diffused reflection, that is, the clothes (Cl) of the person to be air-conditioned extends over the directional angles ± θ _{H 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 18th
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 ).

When the light receiving element (J) is installed so that 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 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 receiving element (J). .

FIG. 19 shows a control block diagram of the spot air conditioner (1). A person detection signal output from the person detection sensor (7) and the like are A / D converters (81) included in the control unit (8). It is configured to be input to the CPU (82) converted into a digital signal by. Further, an angle signal output from the photo interrupter (9) is input to the CPU (82), and a mode change switch for switching the blowing duct (16) between a fixed mode, an automatic swing mode, and a person tracking mode. The mode signal output by (83) is input. Further, the control unit (8) is provided with a memory (84) connected to the CPU (82), the memory (84) including a ROM storing program data for realizing a control flow described later in advance and a RAM storing processing data. Has been
The storage area of the RAM in the memory (84) includes a sensor flag (STF), a person detection flag (HKF) and a person non-detection flag (MKF), while the control unit (8) includes various timers (not shown). (TM1) to (TM4) are included.

Furthermore, the control unit (8) has a first rotation drive circuit (85a) and a left rotation drive circuit (85b) for the duct motor (41), and a first air-conditioning control means (86).
A relay drive circuit (87) for the relay (RY1) and the second relay (RY2) is provided so as to be connected to the CPU (82). The duct motor (41) drives the right rotation and left rotation drive circuits (85a), (8) based on the output signal of the CPU (82).
5b) forward and reverse control, while both relays (RY
1) and (RY2) are configured to be ON / OFF controlled by the relay drive circuit (87) based on the output signal of the CPU (82). Furthermore, the fan control relay (X) included in the air conditioning control means (8) is constituted by both the relays (RY1) and (RY2).
1) and the compressor control relay (X2) are ON / OFF controlled to drive and control the fan motor (12d) and the compressor motor (12h). Then, the air conditioning control means (86) includes the fans (12e), (12f) and the compressor (12
It is configured to control a) by controlling a).

FIG. 2 is a detailed circuit diagram of a main part of FIG. 19 showing a control system of the human detection sensor (7). AC power supplied from an AC power supply (71) is rectified by a rectifier circuit () via a transformer (72). 73)
After being rectified by, it is supplied to each circuit such as each relay (X1) and (X2) requiring control, while the transformer (71) has a light emission timing of the human detection sensor (7), which is a feature of the present invention. The zero-cross detection circuit (75) of the light emission timing setting means (74) for setting is connected. The zero-cross detection circuit (75) is a zero-cross detection means for detecting a zero-cross point of an AC power waveform, and after the AC power waveform is half-wave rectified by a diode (75a), a transistor (75b), a photodiode (75c) and Phototransistor (75d)
It is configured so that it is converted into a rectangular wave and input to the CPU (82), and the rising and falling edges of the rectangular wave correspond to the zero cross points.

Then, in the CPU (82), the light emission timing section of the light emission timing setting means (74) that variably sets the light emission timings of the light emitting elements (H1) and (H2) by the rectangular wave of the zero cross detection circuit (75). (76) is constructed,
A light emission timing changeover switch (77) which is a changeover setting unit for changing over the light emission timing is connected. The light emission timing section (76) emits light from the light emitting elements (H1) and (H2) at the first timing from the rising edge of the rectangular wave, and the light emitting elements (H1) and (H2) at 4 msec after the rising edge of the rectangular wave.
The second timing for emitting light is variable. Then, the light emission timing changeover switch (77)
Is configured to set the light emission timing section (76) to the first timing in the off state and to the second timing in the on state.

In addition, in the CPU (82), the blowing duct (16) is directed toward the air-conditioned person in response to the person detection signal and the movement signal of the person detection sensor (7), and the movement of the air-conditioned person is followed. The wind direction control means (82a) is configured to control the duct motor (41) of the duct drive means (2) so as to move.

Next, the air conditioning control operation of this spot air conditioner (1) will be described.

Therefore, first, the light emission timing operation of the human detection sensor (7), which is a feature of the present invention, will be described.
As shown in the figure (a), while the AC power from the AC power supply (71) is supplied to each control relay (X1), (X2) etc. via the transformer (72) and the rectifier circuit (73), After half-wave rectification by the diode (75a) of the zero-cross detection circuit (75), as shown in FIG. 21 (b), FIG.
As shown in (4), it is changed into a rectangular wave by the transistor (75b) and input to the CPU (82). Then, based on the rectangular wave, the light emission timing section (76) causes the light emitting element (H ₁ ) to
When the light emission timing of (H ₂ ) is set and the light emission timing changeover switch (77) is turned off, both light emitting elements (H ₁ ) are turned on at the same time as the rising of the rectangular wave as shown in FIG. 21 (d). , (H ₂ ) are sequentially emitted, and thereafter, each time the rising edge is emitted.

On the other hand, when the light emission timing selector switch (77) is turned on, as shown in FIG.
6) shows that, when 4 msec has elapsed after the rising of the above rectangular wave, both light emitting elements (H ₁ ) and (H ₂ ) emit light in order, and thereafter, after the rising.
It emits light every 4 msec. Both light emitting elements (H ₁ ) and (H ₂ )
The light emission time of is set to 1 msec.

This flash timing is set with the normal flash timing selector switch (77) turned off (see FIG. 21 (d)).
However, when two spot air conditioners (1) and (1) are installed opposite to each other, the light emission timing changeover switch (77) of one spot air conditioner (1) is turned on (see FIG. )), The phase of the light emission timing of both spot air conditioners (1) and (1) is changed.

Next, the human detection operation of the human detection sensor (7) based on the set light emission timing will be described based on the control flow of FIG. 22 and the control timing of FIG. First
Fig. 22 shows the control contents of the CPU (82), and step ST1
In 01, the light emitting element (H ₂ ) on the right side is turned on (see FIG. 23 (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 it is equal to or more than the set value Vs, the light emitting element (H ₁ ) on the left side is turned on (see FIG. 23 (i)) to emit infrared light in step ST103, and the output V of the light receiving element (J) is output in step ST104. _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 exists in front of the light receiving element (J), and step ST10
The human detection operation is started in 5 and the human detection signal is output in step 106, and then both light emitting elements (H ₁ ) and (H ₂ ) are output 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 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 in step 109, the person to be air-conditioned starts the right movement operation to the right, and in step ST110, the right movement signal is output.

On the other hand, if the determination in step ST102 is NO when the output V ₂ of the light receiving element (J) is lower than the set value Vs, the left light emitting element (H ₁ ) is turned on in step ST111, and in step ST112. Output V ₁ of light receiving element (J) is set value V
It is determined whether it is s or more. 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
When the infrared rays from _one of the light emitting elements (H ₁ or H ₂ ) enter when the determination in NO is not a human detection state, the operation of “no human detection” is started in step ST116, and 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.

Next, the air conditioning control operation of this spot air conditioner (1) will be described based on the control flow shown in FIG. still,
Regarding this control flow, there are a fixed mode in which the air outlet duct (16) is fixed in a fixed direction, an automatic swing mode in which the air outlet duct (16) automatically swings, and an air outlet duct (16). The person tracking mode that rotates following the movement of the air-conditioned person will be described in order.

Therefore, first of all, the fixed mode will be described. After the power is turned on, initialization is performed in step ST1. For example, each flag (STF), (HKF), (MKF)
After the is reset, move to step ST2, and
e), (12f) and the compressor (12a) are driven. That is, C
The relay drive circuit (87) becomes the first by the output signal of PU (82).
And the second relays (RY1) and (RY2) are turned on, the fan control and compressor control relays (X1) and (X2) are turned on, and the fan motor (12d) and the compressor motor (12h) are driven. It will be. After that, the process proceeds from step ST2 to step ST3, the mode is determined, and the mode selection switch (8
Since the fixed mode is provided by 3), step S
Move to T4, stop the duct motor (41) that rotates the blowout duct (16) if it is driving, and then step
Moving to ST5, human detection flag (HKF), non-human detection flag (MK
F) and each timer (TM1) to (TM4) are reset.

Then move to step ST6, and fan (12e), (12f)
If is stopped, turn on the fan control relay (X1).
After turning on and driving, move to step ST7,
It is determined whether 3 minutes have passed since step 2a) stopped. That is, in order to prevent continuous stoppage 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, and the compressor ( Step ST3 with 12a) stopped
On the other hand, if three minutes have passed while returning to step ST7
Then, the process proceeds to step ST9, and when the compressor (12a) is stopped, the compressor control relay (X2) is turned on to drive the compressor (12a), and the process 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 described. 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 (83) is set to the automatic swing mode. Therefore, the automatic swing mode is determined and the process proceeds to step ST10. The duct motor (41) is driven and the blowing duct (16) is reciprocally rotated by the angle signal of the photo interrupter (9). After that, the process moves from step ST10 to step ST5, and operates in the same manner as in the fixed mode up to steps ST8 and ST9, and returns to step ST3.

Next, the human tracking control operation based on the signal processing of the human detection sensor (7) in the human tracking mode will be described with reference to FIG.

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 (83) is set to the human tracking mode. 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 person detection sensor (7) described above outputs a person detection signal, and if the person undetected signal is output in step ST117 described above, to step ST13,
When the person detection signal is output in step ST105, the process proceeds to step ST30.

Therefore, if the person to be air-conditioned is not detected, step ST13
In step ST14, the undetected person operation is started, and it is determined whether or not the undetected person 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 from step ST16 until the expiration of the short waiting time (t ₂₎
I will move to 17. 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, in step ST17, the duct motor (41) is driven, and the blowing duct (16) is oscillated in response to the output signal of the photo interrupter (9) as in the above-described automatic oscillating mode. Then step ST
Move to 18 and drive both fans (12e), (12f) if stopped, move to step ST19
Similar to ST7, it is determined whether or not 3 minutes have passed after the compressor (12a) was stopped to prevent continuous start / stop of the compressor (12a).
After a lapse of minutes, the process moves to step ST20 and continues to be driven while the compressor (12a) is being started or driven. After 3 minutes, the process moves to step ST21 and returns to step ST3 with the compressor (12a) stopped. Become. 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 (7) does not detect an air-conditioned person, the compressor (12a) and the fan (12)
e) and (12f) are driven to wait for 5 minutes for the person to be air-conditioned to enter the air-conditioning area while blowing out cool air, and at the same time, the outlet duct (16) is rotated to turn the person to be air-conditioned in the air-conditioning area. Are searching for.

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 23, turn off the fan control relay (X1) and the compressor control relay (X2), and turn both fans (12e), (12f) and the compressor (12a) are stopped. Then move to step 24,
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 (7) 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, so that the person to be air-conditioned will have an invasion. 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 (7), the compressor (12a) etc. will automatically Never boots.

Next, in this human tracking mode, when the human detection sensor (7) outputs a human detection signal, the process moves from step ST12 to step ST30, the human detection establishment operation is started, the process moves to step 31, and the duct motor (41) turns on. When driving, the duct motor (41) is stopped and the blowout duct (1
6) Stop. After that, the process proceeds to step ST32, and if both fans (12e) and (12f) are stopped, both fans (12e) and (12f) are driven, and then the process proceeds to step ST33, and this step ST33 is described above. As in step ST7, it is determined whether or not 3 minutes have elapsed after the compressor (12a) was stopped to prevent continuous start / stop of the compressor (12a). When the compressor (12a) is moved to ST34 or is being driven, the compressor (12a) is continuously driven and is moved to step ST36 while the compressor (12a) is stopped after 3 minutes, and the step (S) is performed while the compressor (12a) is stopped.
Will move to T36.

Then, in this step ST36, each timer (TM1) to (TM1
After resetting 4), move to step ST37, set the person detection flag (HKF) to "1", move to step ST38, reset the person undetected flag (MKF), and then return to step ST3. . After that, in step ST11, since the human detection flag (HKF) is set (step ST37), the determination is NO, the process proceeds to step ST39, it is determined whether or not the human movement condition is satisfied, and the above-mentioned step ST
In 110 and step ST115, it is determined whether the person movement signal is output, and if the person to be air-conditioned does not move, step
The process returns to ST30, and 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 (7) detects the person to be air-conditioned, the rotation of the blow-out duct (16) is stopped in step ST31 to stop the blow-out duct (16). 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 (7), 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 to be air-conditioned moves during the person detection establishment operation.

First, when the human detection sensor (7) outputs a movement signal in the above-mentioned steps ST110 and ST115, 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)
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 subject to air conditioning has a human detection sensor (7).
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
From ST41 to step ST42, it is determined whether the person to be air-conditioned has moved to the right or left, and based on the output signal of the human detection sensor (7), 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 restricted position, and if it has not rotated to the right end restricted position, that is, the photo interrupter (9) has not detected the side end position. In that case, since it can be rotated to the right,
The process moves from step ST43 to step ST45 to rotate the duct motor (41) to rotate the outlet duct (16) to the right.

Then, in step ST46, the fourth timer (TM4) 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) is rotated to the left end control position, and the limit position is set. If not rotating up 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 when rotating to the right is performed.

That is, when the person to be air-conditioned moves left and right in the air-conditioning area formed by the blowout duct (16), the human detection sensor (7) identifies the moving direction, and steps ST45 and S48
, 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. Then, the process proceeds from step 49 to step ST51 and from step ST50 to step 52, 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 ST2
After performing 1), 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.

Therefore, since the light emission timing of the human detection sensor (7) can be variably set, infrared rays of other human detection sensors (7) are not received, and for example, two spot air conditioners (1), (1 ) Are installed facing each other, it is possible to prevent infrared interference, so there is no false detection,
Highly accurate air conditioning can be performed. Further, since the blow-out duct (16) is directed to the person to be air-conditioned by the person detection signal of the person detecting sensor (7), the air-conditioned air can be surely blown to the person to be air-conditioned, and the person to be air-conditioned can perform various operations. Because you can receive the conditioned air even if you move by
The comfort of air conditioning can be significantly improved, and the air conditioning effect as local air conditioning can be reliably exhibited.

Further, since the AC power waveform of the power source (71) is used, the light emission timing can be accurately changed only by the switching operation, and the interference can be surely prevented.

FIG. 25 shows another embodiment of the light emission timing setting means (74) which is a feature of the present invention, and a delay time setting circuit (78).
And a light emission timing section (79) included in the CPU (82). The delay time setting circuit (78) includes an adjusting potentiometer (78a) including a variable resistor, and a voltage corresponding to the delay time of the light emission timing, for example, 0 to 5 (V).
It constitutes a delay time setting means for inputting the voltage of (2) to the CPU (82). Further, the light emission timing section (79) is configured to set the light emission timing of the light emitting elements (H ₁ ) and (H ₂ ) based on the delay time corresponding to the voltage input from the delay time setting circuit (78). As shown in FIG. 26 (a), when the voltage is 0 (V), the light emitting elements (H ₁ ) and (H ₂ ) emit light after a time (A) after starting. , The light is emitted at every time (2A), and when the adjustment volume (78a) is changed, as shown in FIG. 26 (b), the delay time T corresponding to the voltage is based on this time (A).
(= V) msec is added, and the light emitting elements (H ₁ ) and (H ₂ ) are made to emit light after the time (A + T) after the start, and after that, the time (2
It is configured to emit light for each A).

That is, as shown in the control flow of FIG. 27, at the start, in step ST201, the first set time (T ₁ ) of the first half is derived by adding the delay time (T) to the basic time (A), After waiting until the first set time (T ₁ ) has elapsed, the process proceeds to step ST202, and the light emitting elements (H ₁ ) and (H ₂ ) of the human detection sensor (7) are caused to emit light. Then, step ST
Moving to 203, the second set time (T ₂ ) is derived by subtracting the delay time (T) from the basic time (A), and after waiting until the second set time (T ₂ ) is exceeded, the above step ST201 Then, the above operation is repeated.

That is, when the voltage is set to 0 (V) in the delay time setting circuit (78), as shown in FIG. 26 (a), the light emitting element (H ₁ ), (H ₂ ) emits light, but when the voltage is set to 5 (V), as shown in FIG. 26 (b), the first setting is the basic time (A) plus 5 msec. Time (T ₁ )
After elapse of time, the light emitting elements (H ₁ ) and (H ₂ ) emit light.

Therefore, since the delay time is set, various kinds of light emission timings can be arbitrarily set, so that the variable setting range of the light emission timings can be expanded.

Although the present embodiment has been described with respect to the movable spot air conditioner (1), 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 duct (16) may be pivotally supported on the housing (15) by a pin or the like for rotation.

Further, the blowing duct (16) may be turned up and down, and the turning range is not limited to that of the embodiment.

Further, in the light emission timing setting means (74) shown in FIG. 20, when the infrared rays of the N human detection sensors (7) interfere with each other, one cycle Tw of the power waveform is divided into N equal parts, and from the zero cross point (Tw / N) The light emission timing for the destination may be shifted.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of the present invention. 2 to 27 show an embodiment of the present invention, FIG. 2 is a cross sectional front view of a spot air conditioner, and FIG. 3 is a longitudinal side view of the same.
FIG. 4 is an enlarged vertical sectional view of the duct driving means, FIG. 5 is a plan view showing a partial cross section, FIG. 6 is a plan view of a cover member, FIG. 7 is the same vertical sectional view, and FIG. FIG. 9 is a plan view of the casing, FIG. 9 is a bottom view of the elbow, FIG. 10 is a plan view of the spinning cylinder, FIG. 11 is a sectional view of the idling mechanism, and FIG. 12 is a sectional view of the upper shaft. FIG. 13 is a cross-sectional view of the human detection sensor, FIG. 14 is an explanatory view showing the positional relationship between the light emitting element and the light receiving element, FIG. 15 is a diagram showing the state of propagation of infrared rays to the specular reflector of the human detection sensor, and FIG. FIG. 17 is a diagram showing the propagation state of infrared rays with respect to the inclined specular reflector, FIG. 17 is a diagram showing propagation states of infrared rays with respect to the clothes, and FIG. 18 is a diagram showing propagation states of infrared rays with respect to the moving clothes. FIG. 19 is a control block diagram of the spot air conditioner, FIG. 20 is a detailed circuit diagram of the same part, and FIG. 21 is a timing diagram showing a light emission timing. FIG. 22 is a control flow chart showing the signal processing of the human detection sensor, FIG. 23 is an output timing chart of the signal, and FIG. 24 is a control flow chart showing the air conditioning operation of the spot air conditioner. FIG. 25 is a circuit diagram showing another light emission timing setting means, FIG. 26 is a light emission timing diagram, and FIG.
FIG. 27 is a control flow chart of the light emission timing. (1) …… Spot air conditioner, (2) …… Duct driving means, (7) …… Person detection sensor, (9) …… Photo interrupter, (12) …… Air conditioner body, (71) …… Power supply, (74) …… Light emission timing setting means, (75) …… Zero cross detection circuit, (76), (79) …… Light emission timing section, (77) …… Light emission timing switch, (78) …… Delay time setting Circuit, (82a) ... Wind direction control means

 ─────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-1-145594 (JP, A) JP-A-1-239334 (JP, A) JP-A-1-302187 (JP, A)

Claims (3)

[Claims] 1. An air conditioner body (12) for sucking indoor air to generate conditioned air, and a blow duct (16) rotatably attached to the air conditioner body (12) for blowing out the conditioned air. A duct driving means (2) for rotating the blowout duct (16) with respect to the air conditioner main body (12) to change the blowout direction; a light emitting section (H) for emitting infrared rays and reflected light of the infrared rays. And a light receiving section (J) for receiving light, and the light emitting section (H) intermittently emits infrared rays at predetermined preset timings, and the blowout duct (16) is rotated to be an air conditioning target in an air conditioning area. A person detecting means (7) for detecting a person, and a duct driving means (2) for receiving the person detecting signal of the person detecting means (7) so that the blowout duct (16) faces the person to be air-conditioned. The wind direction control means (82a) and the light emitting part (H) of the person detecting means (7). A spot air conditioner, comprising: a light emission timing setting means (74) for setting imaging to be changeable. 2. The spot air conditioner according to claim 1, wherein the light emission timing setting means (74) takes in the power waveform of the AC power supplied from the power source (71) and detects the zero-cross point of the power waveform. A zero-cross detection section (75), a light-emission timing section (76) variably provided with a plurality of types of light-emission timing based on the zero-cross point detected by the zero-cross detection section (75), and the light-emission timing section (76). A spot air conditioner characterized by comprising a switching setting section (77) for switching and setting the light emission timing. 3. The spot air conditioner according to claim 1, wherein the light emission timing setting means (74) includes a delay time setting section (78) for setting a delay time of the light emission timing, and the delay time setting section (78). A spot air conditioner, comprising: a light emission timing section (79) for setting a light emission timing based on the delay time set in.