JP6727418B2 - Air conditioning indoor unit - Google Patents

Description

The present invention relates to an air conditioning indoor unit that includes a control unit that controls a flow velocity of air blown from a blowout port.

BACKGROUND ART Conventionally, there is known an air conditioning indoor unit including a control unit that controls a flow velocity of air blown from an outlet. Patent Document 1 discloses an air conditioner that is installed on a ceiling surface and sends out air from the ceiling toward an indoor space. In Patent Document 1, when the air blowing direction from the air outlet is lower than a predetermined air blowing direction, the air blowing velocity of the air from the blower unit is reduced. Further, in Patent Document 1, when the blowing direction of the air from the air outlet is higher than a predetermined blowing direction, the blowing velocity of the air from the blowing unit is made high. As a result, Patent Document 1 is intended to improve the comfort by suppressing the temperature unevenness in the indoor space while suppressing the draft feeling, which is the unpleasant feeling caused by the wind being blown directly on the person.

Japanese Unexamined Patent Publication No. 8-94157

However, the air conditioner disclosed in Patent Document 1 makes the flow velocity of air low when the blowing direction of the air from the outlet is downward regardless of the presence or absence of a person. Therefore, it takes a long time to eliminate the temperature unevenness in the indoor space.

The present invention has been made to solve the above problems, and provides an air conditioning indoor unit that quickly reduces temperature unevenness in an indoor space and improves comfort while suppressing a draft feeling for people. It is a thing.

An air conditioner indoor unit according to the present invention is provided in a housing in which a blowout port for blowing air is formed, a heat exchanger provided in the housing, and a heat exchanger for exchanging heat between air and a refrigerant, and provided in the housing. , A blower that blows the heat-exchanged air to the air outlet in the heat exchanger, a wind direction deflection plate that is provided at the air outlet and changes the blowing direction of the air blown from the air outlet, and a person detection that detects the position of a person Section, a distance measuring means for obtaining the distance from the air outlet to the person , and a control section for controlling the flow velocity of the air blown from the air outlet, the control section is an area where the person is detected by the person detecting section. Other than the air flow velocity of the non-detection area, the flow velocity control means for controlling the blower or the wind direction deflector, and the distance measuring means, so that the flow velocity of the air in the detection area where the person is detected by the person detection unit becomes smaller . based on the measured distance, have a, a flow rate calculation means for calculating a flow velocity of the air blown out from the air outlet so velocity is less than the target velocity when it reaches the human, the flow rate calculating means, blowing The flow velocity in the detection area is obtained by dividing the amount of air blown from the outlet by the area of the detection area .

According to the present invention, the flow velocity of the air blown to the detection area where the person is detected is controlled to be smaller than the flow velocity of the air blown to the non-detection area other than the area where the person is detected. That is, since air is sent to the non-detection area at a high flow rate, temperature unevenness in the indoor space can be quickly reduced. Further, since air is sent to the detection area at a low flow rate, it is possible to suppress a draft feeling for a person. In this way, it is possible to quickly reduce temperature unevenness in the indoor space and improve comfort while suppressing the draft feeling to the person.

It is a circuit diagram which shows the air conditioning apparatus 1 which concerns on Embodiment 1 of this invention. It is sectional drawing which shows the air conditioning indoor unit 3 which concerns on Embodiment 1 of this invention. It is a functional block diagram which shows the control part 4 of the air conditioning indoor unit 3 which concerns on Embodiment 1 of this invention. It is sectional drawing which shows the air conditioning indoor unit 3 which concerns on Embodiment 1 of this invention. It is sectional drawing which shows the air conditioning indoor unit 100 which concerns on the modification of Embodiment 1 of this invention. It is a graph which shows the relationship between the distance from the air outlet 10b, and the flow velocity of air. It is sectional drawing which shows the air conditioning indoor unit 3 which concerns on Embodiment 1 of this invention. 3 is a flowchart showing an operation of the air conditioning indoor unit 3 according to Embodiment 1 of the present invention. It is sectional drawing which shows the air conditioning indoor unit 200 which concerns on Embodiment 2 of this invention. It is a perspective view which shows the area S of the non-detection area N. It is a perspective view which shows the area S of the detection area M. It is a flowchart which shows operation|movement of the air conditioning indoor unit 200 which concerns on Embodiment 2 of this invention. It is a bottom view which shows the air conditioning indoor unit 300 which concerns on Embodiment 3 of this invention. It is sectional drawing which shows the air conditioning indoor unit 300 which concerns on Embodiment 3 of this invention. It is sectional drawing which shows the air conditioning indoor unit 400 which concerns on the 1st modification of Embodiment 3 of this invention. It is sectional drawing which shows the air conditioning indoor unit 500 which concerns on the 2nd modification of Embodiment 3 of this invention.

Embodiment 1.
Embodiments of an air conditioning indoor unit according to the present invention will be described below with reference to the drawings. FIG. 1 is a circuit diagram showing an air conditioner 1 according to Embodiment 1 of the present invention. The air conditioner 1 will be described with reference to FIG. As shown in FIG. 1, the air conditioner 1 is a device that adjusts the air in the indoor space, and includes an air conditioning outdoor unit 2, an air conditioning indoor unit 3, and a control unit 4. The air conditioning outdoor unit 2 is provided with a compressor 6, a flow path switching device 7, an outdoor heat exchanger 8, an outdoor blower 8a, and an expansion section 9. The air conditioning indoor unit 3 is provided with a heat exchanger 14 and a blower 13. Although the first embodiment exemplifies the case where the control unit 4 is provided inside the air conditioning indoor unit 3, the control unit 4 may be provided inside the air conditioning outdoor unit 2 or may be provided separately. It may be a unit.

(Refrigerant circuit 5)
The refrigerant circuit 5 is configured by connecting the compressor 6, the flow path switching device 7, the outdoor heat exchanger 8, the expansion unit 9, and the heat exchanger 14 by piping. The compressor 6 sucks the refrigerant in the low temperature and low pressure state, compresses the sucked refrigerant, and discharges the compressed refrigerant in the high temperature and high pressure state. The flow path switching device 7 switches the direction in which the refrigerant flows in the refrigerant circuit 5, and is, for example, a four-way valve. The outdoor heat exchanger 8 exchanges heat between outdoor air and a refrigerant, for example. The outdoor heat exchanger 8 functions as a condenser during cooling operation and as an evaporator during heating operation.

The outdoor blower 8 a is a device that sends outdoor air to the outdoor heat exchanger 8. The expansion section 9 is a pressure reducing valve or an expansion valve that decompresses and expands the refrigerant. The expansion section 9 is, for example, an electronic expansion valve whose opening is adjusted. The heat exchanger 14 exchanges heat between indoor air and a refrigerant, for example. The heat exchanger 14 acts as an evaporator during cooling operation and as a condenser during heating operation. The blower 13 is a device that sends indoor air to the heat exchanger 14.

(Operation mode, cooling operation)
Next, the operation mode of the air conditioner 1 will be described. First, the cooling operation will be described. In the cooling operation, the refrigerant sucked into the compressor 6 is compressed by the compressor 6 and discharged in a high temperature and high pressure gas state. The high-temperature and high-pressure gas-state refrigerant discharged from the compressor 6 passes through the flow path switching device 7 and flows into the outdoor heat exchanger 8 that functions as a condenser, and in the outdoor heat exchanger 8, the outdoor blower 8a. It is condensed and liquefied by exchanging heat with the outdoor air sent by. The condensed refrigerant in the liquid state flows into the expansion section 9 and is expanded and decompressed in the expansion section 9 to become a low-temperature low-pressure gas-liquid two-phase refrigerant. Then, the refrigerant in the gas-liquid two-phase state flows into the heat exchanger 14 that functions as an evaporator, and is heat-exchanged with the indoor air sent by the blower 13 in the heat exchanger 14 to be evaporated and gasified. At this time, the indoor air is cooled, and the room is cooled. The evaporated low-temperature low-pressure refrigerant in a gas state passes through the flow path switching device 7 and is sucked into the compressor 6.

(Operation mode, heating operation)
Next, the heating operation will be described. In the heating operation, the refrigerant sucked into the compressor 6 is compressed by the compressor 6 and discharged in a high temperature and high pressure gas state. The high-temperature and high-pressure gas-state refrigerant discharged from the compressor 6 passes through the flow path switching device 7, flows into the heat exchanger 14 that functions as a condenser, and is sent by the blower 13 in the heat exchanger 14. It is condensed and liquefied by heat exchange with indoor air. At this time, the indoor air is warmed and the room is heated. The condensed refrigerant in the liquid state flows into the expansion section 9 and is expanded and decompressed in the expansion section 9 to become a low-temperature low-pressure gas-liquid two-phase refrigerant. Then, the refrigerant in the gas-liquid two-phase state flows into the outdoor heat exchanger 8 acting as an evaporator, and in the outdoor heat exchanger 8, heat is exchanged with the outdoor air sent by the outdoor blower 8a to be evaporated and gasified. The evaporated low-temperature low-pressure refrigerant in a gas state passes through the flow path switching device 7 and is sucked into the compressor 6.

(Air conditioning indoor unit)
FIG. 2 is a sectional view showing the air conditioning indoor unit 3 according to Embodiment 1 of the present invention. Next, the air conditioning indoor unit 3 will be described in detail. As shown in FIG. 2, the air conditioning indoor unit 3 is a device that is also called, for example, a one-way cassette type, a ceiling-mounted type, a ceiling-embedded type, or a room air conditioner, and includes a housing 10, a grill 11, a filter 12, and The air blower 13, the heat exchanger 14, the wind direction deflection plate 15, the human detection unit 16, and the control unit 4 are provided.

The housing 10 is a box body having a hollow portion, and has a suction port 10a for sucking air and a blowout port 10b for blowing air. In the first embodiment, the case where there is one outlet 10b is illustrated. The grill 11 is provided in the suction port 10a of the housing 10 and is formed in a lattice shape. The filter 12 is provided downstream of the grill 11 at the suction port 10a, and removes air that has passed through the grill 11. The blower 13 is a device that is provided inside the housing 10 downstream of the filter 12 and sends air to the heat exchanger 14. The blower 13 has a fan motor 13a, and the fan motor 13a is a device that rotationally drives the blower 13. The heat exchanger 14 is a device provided inside the housing 10 downstream of the blower 13 and exchanging heat between the air and the refrigerant. The heat exchanger 14 is, for example, a fin-tube type heat exchanger.

The wind direction deflecting plate 15 is a member that is provided at the air outlet 10b and swings or rotates to change the air blowing direction of the air blown from the air outlet 10b. The wind direction deflecting plate 15 has a function of changing the air blowing direction into at least two directions depending on the posture. In the first embodiment, the case where there is one wind direction deflecting plate 15 is illustrated. A deflection driving unit 15a is connected to the wind direction deflecting plate 15, and the deflection driving unit 15a is a device that rotationally drives the wind direction deflecting plate 15 about a rotation axis. The deflection driving unit 15a is composed of, for example, a stepping motor. The position of the wind direction deflecting plate 15 is determined by the number of pulses for driving the deflection driving unit 15a. The position of the wind direction deflecting plate 15 may be detected using a sensor such as a rotary encoder separately.

The human detection unit 16 is attached to the surface of the housing 10 facing the living space, which is the lower surface, and has an infrared sensor. The human detection unit 16 detects the position of a person based on the temperature information obtained by the infrared sensor scanning the indoor space.

(Control unit 4)
FIG. 3 is a functional block diagram showing the control unit 4 of the air conditioning indoor unit 3 according to Embodiment 1 of the present invention. The control unit 4 is a device that controls the operation of devices inside the air conditioning indoor unit 3. The control unit 4 controls the detection operation of, for example, the deflection drive unit 15a connected to the wind direction deflection plate 15, the fan motor 13a connected to the blower 13, and the human detection unit 16. As shown in FIG. 3, the control unit includes a stirring determination unit 41, a distance measurement unit 42, a flow velocity calculation unit 43, an area creation unit 44, a posture detection unit 45, and a flow velocity control unit 46.

(Agitation determination means 41)
The agitation determination means 41 determines whether the air in the indoor space needs to be agitated based on a signal from a remote controller (not shown) or the indoor temperature. For example, when the difference between the target temperature set in the control unit 4 and the indoor temperature becomes large at the start of operation or due to the inflow of outside air due to ventilation or the like, the agitation of the indoor air is performed for the purpose of reducing the temperature unevenness of the indoor air. Determine that is necessary.

(Distance measuring means 42)
FIG. 4 is a cross-sectional view showing the air conditioning indoor unit 3 according to Embodiment 1 of the present invention. The distance measuring means 42 calculates the distance D from the outlet 10b to the person. Here, an example of obtaining the distance D from the outlet 10b to the person A will be described. As shown in FIG. 4, the distance measuring means 42 stores in advance the distance H of the perpendicular line vertically lowered from the person detecting unit 16 to the floor surface. The distance measuring unit 42 detects, for example, an angle formed by a perpendicular line vertically drawn from the position of the person detecting unit 16 and a line connecting the position of the person detecting unit 16 and the person. The distance measuring means 42 calculates the distance D from the outlet 10b to the person A using the following formula (1).

D=H/cos θ (1)

In the first embodiment, when the air conditioning indoor unit 3 is installed, the distance H is set by being input to the control unit 4.

FIG. 5: is sectional drawing which shows the air conditioning indoor unit 100 which concerns on the modification of Embodiment 1 of this invention. Although the first embodiment exemplifies the case where the distance measuring unit 42 of the control unit 4 measures the distance D, the distance D may be measured using hardware. As shown in FIG. 5, the air conditioning indoor unit 100 according to the modified example has a light projecting/receiving device 117, and the light projecting/receiving device 117 is provided on the lower surface of the housing 10. The light emitter/receiver 117 irradiates the person A or the like with sound waves or electromagnetic waves, and receives the light reflected by the person A or the like. The distance measuring unit 42 obtains the distance D from the outlet 10b to the person A based on the time from irradiation to light reception.

(Flow velocity calculation means 43)
FIG. 6 is a graph showing the relationship between the distance D from the outlet 10b and the flow velocity of air. The flow velocity calculation means 43 calculates the flow velocity of the air blown from the outlet 10b based on the distance D measured by the distance measurement means 42 so that the flow velocity when reaching the person becomes the target flow velocity. In FIG. 6, the horizontal axis represents the distance [m] from the air outlet 10b, and the vertical axis represents the air flow velocity [m/s]. In FIG. 6, the case where the amount of air blown out from the air outlet 10b is small is shown by a solid line, and the case where the amount of air blown out from the air outlet 10b is large is shown by a broken line. As shown in FIG. 6, the flow velocity of the air decreases as the distance D from the outlet 10b increases. The target flow velocity is set to 0.2 [m/s], for example.

(Area creating means 44)
FIG. 7: is sectional drawing which shows the air conditioning indoor unit 3 which concerns on Embodiment 1 of this invention. As shown in FIG. 7, the area creating means 44 creates the non-detection area N and the detection area M based on the position of the person detected by the person detecting unit 16. Here, the non-detection area N is an area other than the area where the person is detected, and the detection area M is the area where the person is detected.

(Posture detecting means 45)
The attitude detector 45 detects the attitude of the wind direction deflector 15. The attitude detecting means 45 detects whether the wind direction deflecting plate 15 is in a position where air is sent to the non-detection area N or the wind direction deflecting plate 15 is in a position where air is sent to the detection area M.

(Flow velocity control means 46)
The flow velocity control means 46 controls the blower 13 or the wind direction deflecting plate 15 so that the flow velocity of the air in the detection area M becomes smaller than the flow velocity of the air in the non-detection area N. In the first embodiment, the flow velocity control means 46 controls the rotation speed of the blower 13, and the rotation speed of the blower 13 when the wind direction deflecting plate 15 is at the position where air is sent to the non-detection area N. Control is performed so that the number of rotations of the blower 13 when the wind direction deflecting plate 15 is at the position where the air is sent to the detection area M becomes smaller. That is, the flow velocity control means 46 controls the rotation speed of the blower 13 so that the air is sent to the non-detection area N at a high flow velocity and the air is sent to the detection area M at a slow flow velocity. Here, the flow velocity of the air sent to the non-detection area N is, for example, a flow velocity equal to or higher than the stirring flow velocity with which the indoor space can be sufficiently stirred. The flow velocity of the air sent to the detection area M is, for example, a flow velocity equal to or lower than the target flow velocity (0.2 [m/s]). The flow velocity control means 46 also has a function of increasing the driving speed of the wind direction deflecting plate 15 as in the second embodiment described later, but in the first embodiment, the driving speed of the wind direction deflecting plate 15 is increased. Is controlled to be constant.

(motion)
FIG. 8: is a flowchart which shows operation|movement of the air conditioning indoor unit 3 which concerns on Embodiment 1 of this invention. Next, the operation of the air conditioning indoor unit 3 will be described. As shown in FIG. 8, the stirring determination means 41 determines whether the air in the indoor space needs to be stirred (step ST1). When it is determined that the stirring of air is unnecessary (No in step ST1), the process returns to step ST1. On the other hand, when it is determined that the air needs to be stirred (Yes in step ST1), the blower 13 is driven and the wind direction deflecting plate 15 swings (step ST2).

Then, the attitude detecting means 45 determines whether or not the wind direction deflecting plate 15 is in a position where air is sent to the detection area M (step ST3). When the wind direction deflection plate 15 is located at a position where the air is sent to the non-detection area N (No in step ST3), the rotation speed of the blower 13 is increased so that the air has a flow velocity higher than the stirring flow velocity (step ST6). .. Then, it returns to step ST1 and control is repeated. On the other hand, when the wind direction deflecting plate 15 is at the position where the air is sent to the detection area M (Yes in step ST3), the rotation speed of the blower 13 is slowed down so that the air velocity is equal to or lower than the target flow velocity (step ST4). ). That is, the rotation speed of the blower 13 is controlled to the rotation speed according to the distance from the outlet 10b to the person (step ST5). Then, it returns to step ST1 and control is repeated.

According to the first embodiment, the flow velocity of the air blown to the detection area M in which the person is detected is smaller than the flow velocity of the air blown to the non-detection area N other than the area where the person is detected. Controlled by. That is, since the air is sent to the non-detection area N at a high flow rate, the air cooled and heated by the heat exchanger 14 is conveyed to a place far from the air conditioning indoor unit 3. Therefore, the stirring of air is promoted. Therefore, the temperature unevenness in the indoor space can be quickly eliminated. Further, since air is sent to the detection area M at a low flow rate, it is possible to suppress a feeling of draft which is an uncomfortable feeling caused by the wind being blown directly on the person. As described above, the air-conditioning indoor unit 3 can improve the comfort by quickly reducing the temperature unevenness in the indoor space while suppressing the draft feeling to the person.

In the first embodiment, the flow velocity control means 46 controls the rotation speed of the blower 13, and is based on the rotation speed of the blower 13 when the wind direction deflecting plate 15 is at the position where air is sent to the non-detection area. Also, control is performed so that the rotation speed of the blower 13 is small when the wind direction deflecting plate 15 is at the position where air is sent to the detection area. In this way, the flow velocity of air can be controlled by the rotation speed of the blower 13.

Further, the air conditioning indoor unit 3 further includes a distance measuring unit 42 for obtaining the distance from the outlet 10b to the person, and the control unit 4 determines the time when the person reaches the person based on the distance measured by the distance measuring unit 42. It further has a flow velocity calculating means 43 for calculating the flow velocity of the air blown out from the outlet 10b so that the flow velocity becomes equal to or less than the target flow velocity (0.2 [m/s]). As a result, the air that has been cooled and heated can be sent to the detection area M while reliably suppressing the draft feeling to the person, and the comfort can be further improved.

Note that the flow velocity control unit 46 controls the blower 13 so that when the air is blown to the non-detection area N, the flow velocity of the air becomes smaller as the angle from the vertical line vertically lowered from the person detecting unit 16 becomes smaller. May be configured as. Specifically, the flow velocity control means 46 determines the flow velocity of the air when the wind direction deflecting plate 15 is in the position where the air is sent in the horizontal direction in the non-detection area N, and the wind direction deflecting plate 15 is in the non-detection area N. It may be configured to be smaller than the flow velocity of the air when it is at a position where the air is sent in a direction other than the horizontal direction. That is, the flow velocity control means 46 determines the number of rotations of the blower 13 when the wind direction deflecting plate 15 is in the position where the air is sent in the horizontal direction in the non-detection area N. The rotation speed of the blower 13 is controlled to be small when the air is blown in a direction other than the direction.

When the wind direction deflecting plate 15 is located at a position where air is sent in the horizontal direction, if the flow velocity of the air is high, the air hitting the wall flows toward the ceiling side, and smudging occurs in which dirt in the air adheres to the ceiling surface. There is a risk. In the first embodiment, the flow velocity of the air when the wind direction deflecting plate 15 is in the position where the air is sent in the horizontal direction in the non-detection area N is as follows. By controlling so as to be smaller than the flow velocity of the air when it is at the position where the air is sent in the direction, it becomes difficult for the air hitting the wall to flow to the ceiling side. Therefore, it is possible to suppress the occurrence of smudging in which dirt in the air adheres to the ceiling surface.

Embodiment 2.
FIG. 9 is a sectional view showing an air conditioning indoor unit 200 according to Embodiment 2 of the present invention. The second embodiment is different from the first embodiment in that the driving speed for changing the direction of the wind direction deflecting plate 15 is controlled. In the second embodiment, the flow velocity of air is controlled without changing the rotation speed of the blower 13. In the second embodiment, the same parts as those in the first embodiment will be designated by the same reference numerals, and the description thereof will be omitted. Differences from the first embodiment will be mainly described.

As shown in FIG. 9, the flow velocity control means 46 controls the driving speed for changing the direction of the wind direction deflecting plate 15, and when the wind direction deflecting plate 15 is in a position where air is sent to the non-detection area N. The drive speed of the wind direction deflecting plate 15 is controlled to be higher than the drive speed of the wind direction deflecting plate 15 when the wind direction deflecting plate 15 is at a position where air is sent to the detection area M. The drive speed of the wind direction deflecting plate 15 changes by changing the rotation speed of the deflection driving unit 15a. That is, the flow velocity control means 46 controls the air to be sent to the non-detection area N at a high flow velocity, and controls the air to be sent to the detection region M at a slow flow velocity. Here, if the rotation speed of the deflection drive unit 15a is reduced and the drive speed of the wind direction deflection plate 15 is reduced, the amount of air blown out from the air outlet 10b is increased, and the flow velocity of air is increased. On the other hand, when the rotation speed of the deflection driving unit 15a is increased and the driving speed of the wind direction deflecting plate 15 is increased, the air blown out from the air outlet 10b is dispersed in a wide range, so that the flow velocity of the air becomes slow. The flow velocity control means 46 also has a function of reducing the rotation speed of the blower 13 as in the first embodiment, but in the second embodiment, the rotation speed of the blower 13 is kept constant. Have control.

10 is a perspective view showing the area S of the non-detection area N, and FIG. 11 is a perspective view showing the area S of the detection area M. The flow velocity of air is obtained from the amount of air. For example, the flow velocity of the air when reaching the person is obtained by dividing the amount of the air blown from the outlet 10b by the air passage area S at the arrival point of the air. As shown in FIG. 10, when the driving speed of the wind direction deflecting plate 15 decreases, the air passage area S through which the air flows decreases. Therefore, the flow velocity of air becomes faster. On the other hand, as shown in FIG. 11, as the driving speed of the wind direction deflecting plate 15 increases, the air passage area S through which the air flows increases. Therefore, the flow velocity of air becomes slow.

FIG. 12 is a flowchart showing the operation of the air conditioning indoor unit 200 according to Embodiment 2 of the present invention. Next, the operation of the air conditioning indoor unit 200 will be described. As shown in FIG. 12, the stirring determination means 41 determines whether the air in the indoor space needs to be stirred (step ST11). When it is determined that the air stirring is not necessary (No in step ST11), the process returns to step ST11. On the other hand, when it is determined that the air needs to be stirred (Yes in step ST11), the blower 13 is driven and the wind direction deflecting plate 15 swings (step ST12).

Then, the attitude detecting means 45 determines whether or not the wind direction deflecting plate 15 is in a position where air is sent to the detection area M (step ST13). When the wind direction deflecting plate 15 is located at a position where air is sent to the non-detection area N (No in step ST13), the driving speed of the wind direction deflecting plate 15 is reduced so that the air velocity becomes equal to or higher than the stirring flow velocity (step). ST16). Then, it returns to step ST11 and control is repeated. On the other hand, when the wind direction deflecting plate 15 is located at a position where air is sent to the detection area M (Yes in step ST13), the driving speed of the wind direction deflecting plate 15 is increased so that the air velocity is equal to or lower than the target flow velocity (( Step ST14). That is, the drive speed of the wind direction deflection plate 15 is controlled to a drive speed according to the distance from the outlet 10b to the person (step ST15). Then, it returns to step ST11 and control is repeated.

According to the second embodiment, the flow velocity control means 46 controls the driving speed for changing the direction of the wind direction deflecting plate 15, and the wind direction deflecting plate 15 is at a position where air is sent to the non-detection area N. In this case, the driving speed of the wind direction deflecting plate 15 is controlled to be higher than the driving speed of the wind direction deflecting plate 15 in the case where the air direction deflecting plate 15 is in the position where the air is sent to the detection area M. When the wind direction deflecting plate 15 is located at a position where air is sent to the non-detection area N, when the rotation speed of the deflection driving unit 15a is reduced to lower the driving speed of the wind direction deflecting plate 15, the air blown out from the air outlet 10b is discharged. , Is transported to a place far from the air conditioning indoor unit 200. Therefore, the agitation of air is promoted, and the temperature unevenness in the indoor space can be quickly eliminated.

Further, when the wind direction deflecting plate 15 is at a position where air is sent to the detection area M, when the rotation speed of the deflection driving unit 15a is increased to increase the driving speed of the wind direction deflecting plate 15, the air blown out from the air outlet 10b. However, it is dispersed over a wide range, and the flow velocity of air when it reaches a person becomes slow. Therefore, it is possible to suppress the draft feeling, which is an uncomfortable feeling caused by the wind being blown directly on the person. As described above, even if the flow velocity of the air is controlled by the driving speed of the wind direction deflecting plate 15, it is possible to quickly reduce the temperature unevenness in the indoor space and improve the comfort while suppressing the draft feeling to the person. Further, since the rotation speed of the blower 13 is not changed, the amount of blown air is not reduced. Therefore, the agitation of the indoor air can be further promoted.

When the airflow is sent to the non-detection area N, the flow velocity control means 46 controls the wind direction deflecting plate 15 so that the flow velocity of the air decreases as the angle from the vertical line vertically lowered from the human detection unit 16 decreases. May be configured to do so. Specifically, the flow velocity control means 46 determines the flow velocity of the air when the wind direction deflecting plate 15 is in the position where the air is sent in the horizontal direction in the non-detection area N, and the wind direction deflecting plate 15 is in the non-detection area N. It may be configured to be smaller than the flow velocity of the air when it is at a position where the air is sent in a direction other than the horizontal direction. That is, the flow velocity control means 46 determines the driving speed of the wind direction deflecting plate 15 in the non-detection area N when the wind direction deflecting plate 15 is in the non-detection area N at a position where air is sent in the horizontal direction. Control is performed so that the driving speed of the wind direction deflecting plate 15 at a position where air is sent in a direction other than the horizontal direction is increased.

When the wind direction deflecting plate 15 is located at a position where air is sent in the horizontal direction, if the flow velocity of the air is high, the air hitting the wall flows toward the ceiling side, and smudging occurs in which dirt in the air adheres to the ceiling surface. There is a risk. In the second embodiment, the flow velocity of the air when the wind direction deflecting plate 15 is in the position where the air is sent in the horizontal direction in the non-detection area N is as follows. By controlling so as to be smaller than the flow velocity of the air when it is at the position where the air is sent in the direction, it becomes difficult for the air hitting the wall to flow to the ceiling side. Therefore, it is possible to suppress the occurrence of smudging in which dirt such as dust in the air adheres to the ceiling surface.

The air flow velocity may be changed by both the rotation speed of the blower 13 and the drive speed of the wind direction deflecting plate 15.

Embodiment 3.
FIG. 13 is a bottom view showing an air conditioning indoor unit 300 according to Embodiment 3 of the present invention. The third embodiment is different from the first embodiment in that four outlets 320 and four wind direction deflecting plates 325 are provided. In the third embodiment, the same parts as those in the first embodiment will be designated by the same reference numerals, and the description thereof will be omitted. Differences from the first embodiment will be mainly described.

As shown in FIG. 13, the air conditioning indoor unit 3 is a device also called, for example, a four-way cassette type. Four air outlets 320a, 320b, 320c, 320d are formed in the housing 310, and four wind direction deflecting plates 325a, 325b, 325c, 325d are provided in the respective air outlets 320a, 320b, 320c, 320d. There is. In the following description, the four outlets 320a, 320b, 320c, 320d may be referred to as the outlets 320, and the four wind direction deflecting plates 325a, 325b, 325c, 325d may be referred to as the wind direction deflecting plates 325. The numbers of the air outlets 320 and the wind direction deflecting plates 325 are not limited to four, and may be two, three, or five or more.

FIG. 14: is sectional drawing which shows the air conditioning indoor unit 3 which concerns on Embodiment 3 of this invention. As shown in FIG. 14, the housing 310 is a box having a hollow portion, and has a suction port 310a for sucking in air and a blowout port 320 for blowing out air. The grill 311 is a lattice-like member that is provided at the suction port 310a of the housing 310 and covers the suction port 310a. The filter 312 is provided downstream of the grill 311 at the suction port 310a and removes air that has passed through the grill 311. The blower 313 is a device provided inside the housing 310, downstream of the filter 312, and sends air to the heat exchanger 314. The blower 313 has a fan motor 313a, and the fan motor 313a is a device that rotationally drives the blower 313. The heat exchanger 314 is a device that is provided inside the housing 310, downstream of the blower 313, and exchanges heat between air and refrigerant. The heat exchanger 314 is, for example, a fin tube type heat exchanger.

The wind direction deflecting plate 325 is a member that is provided at each of the air outlets 320 and swings or rotates to change the air blowing direction of the air blown from the air outlets 320. A deflection drive unit 315a is connected to the wind direction deflection plate 325, and the deflection drive unit 315a is a device that rotationally drives the wind direction deflection plate 325 around a rotation axis. The deflection driving unit 15a is composed of, for example, a stepping motor. The position of the wind direction deflecting plate 325 is determined by the number of pulses for driving the deflection driving unit 315a. The position of the wind direction deflection plate 325 may be detected separately by using a sensor such as a rotary encoder.

The human detection unit 316 is attached to the surface of the housing 310 facing the living space, which is the lower surface, and has an infrared sensor. The human detection unit 316 detects the position of a person based on the temperature information obtained by the infrared sensor scanning the indoor space.

The control unit 4 is a device that controls the operation of devices inside the air conditioning indoor unit 3. The control unit 4 controls the detection operation of the deflection drive unit 315a connected to the wind direction deflection plate 325, the fan motor 313a connected to the blower 313, and the human detection unit 316, for example. In the third embodiment, the flow velocity control means 46 independently controls the flow velocity of the air blown out from the four outlets 320.

According to the third embodiment, the flow velocity of the air blown to the detection area M where the person is detected is smaller than the flow velocity of the air blown to the non-detection area N other than the area where the person is detected. Controlled by. That is, since the air is sent to the non-detection area N at a high flow rate, the air cooled and heated by the heat exchanger 14 is conveyed to a place far from the air conditioning indoor unit 3. Therefore, the stirring of air is promoted. Therefore, the temperature unevenness in the indoor space can be quickly eliminated. Further, since air is sent to the detection area M at a low flow rate, it is possible to suppress a feeling of draft which is an uncomfortable feeling caused by the wind being blown directly on the person. As described above, the air-conditioning indoor unit 3 can improve the comfort by quickly reducing the temperature unevenness in the indoor space while suppressing the draft feeling to the person.

In the third embodiment, a plurality of air outlets 320 are formed in the housing 310, a plurality of airflow direction deflecting plates 325 are provided in the respective air outlets 320, and the flow velocity control means 46 has a plurality of air outlets. The flow velocity of the air blown from the outlet 320 is independently controlled. As described above, even if the plurality of air outlets 320 and the wind direction deflecting plate 325 are provided, as in the first embodiment, it is possible to quickly reduce the temperature unevenness in the indoor space while suppressing the draft feeling to the person and comfort. It is possible to improve the sex. Further, the control unit 4 controls the flow velocity of the air when it reaches a person to be equal to or less than the target flow velocity (0.2 [m/s]). As a result, the air that has been cooled and heated can be sent to the detection area M while reliably suppressing the draft feeling to the person, and the comfort can be further improved.

When the airflow is sent to the non-detection area N, the flow velocity control means 46 controls the blower 13 so that the airflow velocity decreases as the angle from the vertical line vertically lowered from the human detection unit 16 decreases. It may be configured. Specifically, the flow velocity control means 46 determines the flow velocity of the air when the wind direction deflecting plate 325 is in a position where air is sent in the horizontal direction in the non-detection area N, and the wind direction deflecting plate 325 determines the air flow rate in the non-detection area N. It may be configured to be smaller than the flow velocity of the air when it is at a position where the air is sent in a direction other than the horizontal direction. That is, the flow velocity control means 46 determines the rotation speed of the blower 313 when the wind direction deflecting plate 325 is in the position where the air is horizontally sent in the non-detection area N. The rotation speed of the blower 313 is controlled to be small when the air is in a position other than the direction.

When the wind direction deflecting plate 325 is located at a position where air is sent in the horizontal direction, if the flow velocity of the air is high, the air hitting the wall flows to the ceiling side, and smudging occurs in which dirt in the air adheres to the ceiling surface. There is a risk. In the first embodiment, the flow velocity of the air when the wind direction deflecting plate 325 is in the position where the air is sent in the horizontal direction in the non-detection area N is the flow velocity of the air when the wind direction deflecting plate 325 is in the non-detection area N other than the horizontal direction. By controlling so as to be smaller than the flow velocity of the air when it is at the position where the air is sent in the direction, it becomes difficult for the air hitting the wall to flow to the ceiling side. Therefore, it is possible to suppress the occurrence of smudging in which dirt in the air adheres to the ceiling surface.

Further, even if the flow velocity of the air is controlled by the driving speed of the wind direction deflecting plate 325 as in the second embodiment, the temperature unevenness in the indoor space is rapidly reduced while suppressing the draft feeling to the person, and the comfort is improved. Can be improved. In this case, since the rotation speed of the blower 313 is not changed, the amount of blown air is not reduced. Therefore, the agitation of the indoor air can be further promoted.

(First modification)
FIG. 15: is sectional drawing which shows the air conditioning indoor unit 400 which concerns on the 1st modification of Embodiment 3 of this invention. As shown in FIG. 15, in the first modification, the flow velocity control unit 46 determines that the number of people in the detection area M is higher than the flow velocity of the air blown to the area E in which the number of people in the detection area M is small. The flow velocity of the air blown to the large area F is controlled to be small. Specifically, the flow velocity control unit 46 causes the wind direction when the air is sent to the area F where the number of people is larger than the driving speed of the wind direction deflecting plate 325 when the air is sent to the area E where the number of people is small. The control is performed so that the driving speed of the deflection plate 325 is increased. As a result, the larger the number of people is, the slower the flow velocity of air becomes, so that draft feeling can be suppressed for all people in the indoor space.

Further, in order to reduce the flow velocity of the air, the area F, which has a large number of people, is dealt with by increasing the driving speed of the wind direction deflecting plate 325, so that it takes time to reduce the rotation speed of the blower 313. Can be shortened. Therefore, it is possible to suppress a decrease in the air flow rate.

(Second modified example)
FIG. 16 is a sectional view showing an air conditioning indoor unit 500 according to a second modified example of the third embodiment of the present invention. As shown in FIG. 16, in the second modified example, the control unit 4 sends the drive range K of the wind direction deflecting plate 325 corresponding to the area having a large number of people in the detection area M to the non-detection area N by air. The drive range J of the wind direction deflecting plate 325 corresponding to the area where the number of people is small in the detection area M is controlled to a position where air is sent to the non-detection area N and the detection area M. As a result, in an area with a large number of people, the wind is hardly blown directly on the people. The flow velocity of the air blown to the area where the number of people is small is slower than the flow velocity of the air blown to the non-detection area N. Therefore, draft feeling can be suppressed for all persons in the indoor space.

Further, since the air is not sent to the area where the number of people is large, it is not necessary to reduce the rotation speed of the blower 313. Therefore, it is possible to shorten the time for reducing the rotation speed of the blower 313. Therefore, it is possible to suppress a decrease in the air flow rate.

1 air conditioner, 2 air conditioning outdoor unit, 3 air conditioning indoor unit, 4 control unit, 5 refrigerant circuit, 6 compressor, 7 flow path switching device, 8 outdoor heat exchanger, 8a outdoor blower, 9 expansion unit, 10 housing 10a Suction port, 10b Air outlet, 11 Grill, 12 Filter, 13 Blower, 13a Fan motor, 14 Heat exchanger, 15 Wind direction deflection plate, 15a Deflection drive part, 16 people detection part, 41 Stirring judgment means, 42 Distance measurement Means, 43 Flow velocity calculating means, 44 Area creating means, 45 Attitude detecting means, 46 Flow velocity controlling means, 100 Air conditioning indoor unit, 117 Light emitting/receiving device, 200 Air conditioning indoor unit, 300 Air conditioning indoor unit, 310 Housing, 310a Suction port, 311 Grill, 312 Filter, 313 Blower, 313a Fan Motor, 314 Heat Exchanger, 315a Deflection Drive Section, 316 Human Detection Section, 320, 320a, 320b, 320c, 320d Air Outlet, 325, 325a, 325b, 325c, 325d Wind Direction Deflection plate, 400 air conditioning indoor unit, 500 air conditioning indoor unit, A person, D distance, E area, F area, H distance, J driving range, K driving range, M detection area, N non-detection area, S area.

Claims (9)

A casing formed with an outlet for blowing out air,
A heat exchanger provided inside the casing for exchanging heat between air and a refrigerant;
A blower that is provided inside the housing and blows air that has undergone heat exchange in the heat exchanger to the outlet.
An air flow direction deflecting plate that is provided at the air outlet and changes the air blowing direction of the air blown out from the air outlet,
A person detection unit for detecting the position of a person,
Distance measuring means for obtaining the distance from the outlet to a person,
A control unit for controlling the flow velocity of the air blown from the air outlet,
The control unit is
The blower or the wind direction so that the flow velocity of the air in the detection area where the person is detected by the person detection unit is smaller than the flow velocity of the air in the non-detection area other than the area where the person detection unit is detected. Flow velocity control means for controlling the deflection plate ,
Based on the distance measured by the distance measuring means, have a, a flow rate calculation means for calculating a flow velocity of the air blown out from the air outlet so velocity is less than the target velocity when it reaches the person,
The flow velocity calculation means,
An air conditioning indoor unit that obtains a flow velocity in the detection area by dividing the amount of air blown from the outlet by the area of the detection area . The flow velocity control means,
Which controls the rotation speed of the blower,
Rotational speed of the blower when the wind direction deflecting plate is at a position where air is sent to the detection area, rather than rotational speed of the blower when the airflow direction deflecting plate is at a position where air is sent to the non-detection area The air conditioning indoor unit according to claim 1, wherein the air conditioning indoor unit is controlled so that The flow velocity control means,
Controlling the driving speed for changing the direction of the wind direction deflector,
The wind direction deflection when the wind direction deflecting plate is at a position where air is sent to the detection area is higher than the driving speed of the wind direction deflecting plate when the air direction deflecting plate is at a position where air is sent to the non-detection area. The air conditioning indoor unit according to claim 1 or 2, wherein the driving speed of the plate is controlled to increase. The control unit is
Based on the position of the person detected by the person detecting portion, the air conditioner indoor unit according to any one of claims 1 to 3, further comprising an area creating means for creating the non-detection area and the detection area. The flow velocity control means,
When the air is blown to the non-detection area, the blower or the wind direction deflecting plate is controlled so that the flow velocity of the air becomes smaller as the angle from the vertical line vertically lowered from the person detecting unit becomes smaller. The air conditioning indoor unit according to any one of 4 above. A plurality of the outlets are formed in the housing,
The plurality of wind direction deflecting plates are provided in each of the air outlets,
The flow velocity control means,
The air conditioning indoor unit according to any one of claims 1 to 6 , wherein the air velocities of the air blown out from the plurality of air outlets are independently controlled. The flow velocity control means,
The air conditioning indoor unit according to claim 6 , wherein the driving ranges or driving speeds of the plurality of wind direction deflecting plates are independently controlled. The flow velocity control means,
The blower or the wind direction so that the flow velocity of the air blown to the area having a large number of people is smaller than the flow velocity of the air blown to the area having a small number of people in the detection area. The air-conditioning indoor unit according to claim 6 or 7 , which controls the deflection plate. The control unit is
The drive range of the wind direction deflector corresponding to an area with a large number of people among the detection areas is limited to a position where air is sent to the non-detection area, and corresponds to an area with a small number of people among the detection areas. the driving range of the wind direction deflection plate, the air conditioner indoor unit according to any one of claims 6-8 for controlling the position where the air is sent to the non-detection area and the detection area to be.

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