JPH0796962B2 - Air conditioning method and outlet device used therefor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an air conditioning method for controlling the direction and the wind speed of a blown airflow from an air outlet in order to save energy and improve comfort of a occupant during air conditioning in a room. And a blow-out device used for this.

[Prior Art] Japanese Patent Application Laid-Open No. 60-248938 is already known as a device for saving energy when air conditioning in a room. This is an optimization of the blast temperature by changing the set value of the target temperature when the detected air supply amount falls below a predetermined amount in a variable air volume (VAV) system. VAV like this
The system is a VA equipped with a diaphragm damper in the middle of the air duct.
The V unit is inserted to control the amount of airflow by controlling the degree of throttling by the throttling damper according to the temperature in the room to be air-conditioned.

However, this VAV system has a problem that the comfort of the occupants is impaired when the air volume is low. That is, as shown schematically in Fig. 12, warm air stagnates near the ceiling during heating as shown by the solid line, and during cooling, cool air does not spread sufficiently and falls near the outlet as shown by the broken line. However, even if the blast temperature was optimized, the sensation experienced by the residents was not sufficient. Trying to solve this,
The air outlet described in Japanese Utility Model Publication No. 60-146246 is known. This is the outlet body, as shown in Figure 13.
A center cone 15 arranged in the center of 14 is configured to be movable up and down, the center cone 15 is equipped with a heat-sensitive drive device 16 that detects the temperature of the room and moves the center cone 15 up and down according to the temperature, The heat-sensitive reversing device 18 is provided for detecting the cooling / heating mode from the temperature of the air blown in the duct 17 and reversing the vertical movement of the center cone 15 based on the detection.

[Problems to be solved by the invention]

However, even if such an outlet is adopted, the outlet direction is restricted by the movement width of the center cone and the control width is small.
The variable air volume, which is a feature of VAV systems, is not fully utilized.

That is, in the heating mode, the cone is raised to send the airflow downward, and in the cooling mode, the cone is lowered to try to diffuse the airflow, but in the heating mode, when the room temperature is low, in the cooling mode, the room is cooled. When the temperature is high,
Since the air volume increases respectively, the conditioned air supplied with this large air volume has a problem that the blowing air speed becomes too fast because of the restriction on the opening area of the air outlet, causing a resident to feel a draft and causing pressure loss. there were.

In order to solve such a problem, the present invention responds to the temperature condition in the room with good responsiveness, and performs cooling. The problem to be solved is to select the optimum blowing direction and blowing wind speed for each heat load in each mode of heating to operate in a power-saving manner.

Further, it is an object of the present invention to provide a suitable air outlet device for solving the above-mentioned problem.

[Means for Solving the Problems]

The present invention has the following configuration in order to solve the above problems.

In the air conditioning method of the present invention, the anemo type air outlet 31 including the central air outlet 34 and the annular air outlet 35 surrounding the air outlet is provided on the ceiling of the room to be air-conditioned, and the air outlets 34, 35 of the air outlet 31 are provided. Five
In the air blowing method of opening and closing according to the cooling and heating modes of 1, in the cooling, the annular blowing passage 35 is fully opened, and the opening of the central blowing passage 34 is made to follow the difference between the set temperature and the indoor temperature. , The central outlet 34 is fully opened during heating, the opening of the annular outlet 35 is made variable by following the difference between the set temperature and the room temperature, and the air conditioning is performed during cooling and heating. The amount of supply air sent from the machine 51 to the outlet is made variable by following the difference between the set temperature and the room temperature.

As the outlet device used in the method of the present invention, a central outlet passage is provided inside a cylindrical cone 33 whose lower end edge expands outward.
34, and surrounds this central outlet 34 to form an annular outlet.
At least one 35 is formed, and each blowout passage 34, 35 is provided with a plurality of damper groups 34a, 35a, respectively, and a drive shaft 39 for driving the damper groups 34a, 35a is provided inside and outside the outlet 31. On the other hand, a device in which a motor 47 that rotates according to a control signal is installed outside the air outlet and a motion of the motor 47 is transmitted to the drive shaft 39 via a link mechanism 40 is suitable.

Since the air outlet 31 of the present invention has the dampers 34a and 35a that can be opened and closed, it has an air volume control mechanism corresponding to a conventional VAV unit.

As an air-conditioning system for carrying out the method of the present invention, the air-conditioning air outlet 31 is provided with the above-mentioned anemo type air outlet 31, and the air-conditioner 51 is connected to the air outlet 31 via a duct, while the air-conditioner Whether 51 is operating cold or warm,
Alternatively, there is provided a control device 63 that controls the blowing direction and the blowing wind speed with parameters such as the opening degree of the dampers 34a and 35a and the temperature of the room to be air-conditioned.

The damper control means 65 fully opens the damper 35a and fully closes the damper 34a in the basic mode during cooling. As a result, cold air enters near the ceiling, diffuses evenly into the room, and then descends. And due to the fluctuation of the indoor load,
When the indoor temperature becomes higher than the preset temperature, the damper 34a is opened, and its opening is adjusted according to the difference between the preset temperature and the indoor temperature. As a result, the damper 34a is fully opened, and the damper 35a is fully closed. This causes the warm air to rise once it has been blown to the floor. Then, when the indoor temperature becomes lower than the set temperature due to the fluctuation of the indoor load, the damper 35a of the annular blowout passage 35 is opened, and the opening degree is adjusted according to the difference between the set temperature and the indoor temperature. I am doing it.

Here, in addition to the opening / closing control of the dampers 34a and 35a, the control of the air supply amount is also used, that is, the air amount corresponding to the damper opening is controlled so as to supply the air to the anemo type outlet 31. For example, in a facility including an air conditioner 51 having a fan 54 driven by an inverter 53, the frequency of the inverter 53 is variable based on the difference between the set temperature and the room temperature.

[Action]

During the cooling operation, as a basic mode, the damper 34a is fully closed and the damper 35a is fully open. Air supply here is damper 35a
The operation is performed in an amount of supply air that is commensurate with the area, that is, in the minimum air volume operation mode. The cooling operation is controlled so that the indoor temperature becomes the preset temperature, but when the indoor temperature becomes higher than the preset temperature due to the fluctuation of the indoor load, the fully closed damper 34a is opened and the opening Is controlled according to the difference between the room temperature and the set temperature.

By doing so, the amount of cold air in the annular blowout passage 35 becomes substantially constant, and is guided outward by the cone 33, the blowing direction is horizontal and the blowing speed is suitable, and the air is diffused evenly in the guide.

Also, during heating operation, the damper 34a is set as the basic mode.
Is fully opened and the damper 35a is fully closed. The air supply here is performed in an operation of an air supply amount commensurate with the area of the damper 34a, that is, in a minimum air volume operation mode. The heating operation is also controlled so that the room temperature reaches the preset temperature.However, if the indoor temperature becomes higher than the preset temperature due to the fluctuation of the indoor load, the fully closed damper 35a is opened and opened. The temperature is controlled according to the difference between the room temperature and the set temperature.

In this way, the amount of warm air in the central outlet 34 is almost constant, the outlet direction is directly below and the outlet speed is suitable, so that the warm air is blown out immediately below and then rises and diffuses into the room. Therefore, warm air does not stay near the ceiling as in the conventional case.

Also, in order to obtain a good airflow distribution in the room as described above, the air supply volume was made variable by following the difference with the set temperature, so it is sufficient to supply air in proportion to the indoor load to save energy for fan power. Contribute.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

<Example 1> An example of an outlet device used in the method of the present invention is shown in Figs.
It will be described with reference to the drawings.

The air-conditioning air outlet 31 has one cylindrical center cone 33 whose lower end edge expands outward in an outlet main body 32 whose bottom surface is opened in a circular shape and has a circular shape. A central outlet 34 is defined inside the center cone 33, and an annular outlet 35 is formed outside the center cone 33 around the central outlet 34.

Further, dampers 34a and 35a for opening and closing the blowout passages 34 and 35 are provided at the root portions of the blowout passages 34 and 35, respectively.
In each case, a plurality is provided. The damper groups 34a, 35a of the central blowout passage 34 are fan-shaped plates, respectively, and when fully closed, they are formed so as to have a circular shape as a whole corresponding to the central blowout passage 34 having a circular cross section. Damper group
Each of 34a and 35a is also a fan-shaped plate, and is formed so as to have an annular shape as a whole when fully closed, corresponding to the annular blowing passage 35 having an annular cross section.

Then, in each damper group 34a, 35a, the damper group 34a, 35a
Each of the dampers 34a, 35a constituting the unit has a rotary shaft 36 that forms the center line of the fan-shaped damper, and the rotary shaft 36 allows the blower outlet to exit.
31 It is rotatably supported by the body. Damper group 34a is 1
A sheet is attached to the drive shaft 39. In this example, a damper 34a 'on the side of the link mechanism 40, which will be described later, corresponds to that. The damper 34a 'and the other damper group 34a are connected by a connecting rod 37 via a connector. Also, a group of dampers that opens and closes the ring-shaped outlet 35.
35a also has one of them attached to the drive shaft 38, and is connected to the other damper group 35a by a connecting rod 37. The connection state of the damper groups 34a, 35a by the connecting rod 37 is, as shown in FIG. 4, one of the dampers 34a, 35a adjacent to each other and one of the dampers 34a, 35a adjacent to the other. It is in a state of being sequentially connected to the other end of the back surface by connecting rods 37, 37 whose both ends are rotatably supported.Each damper 34a, 35a is opened and closed synchronously by the action of the connecting rod 37 in its group. It is supposed to do. That is, the one damper 34a, 35a attached to the drive shaft 38, 39 rotates, and accordingly, the kinetic force is transmitted from the connecting rod 37, 37 to the connector of the adjacent damper 34a, 35a to rotate the damper. Report the exercise in sequence. The drive shaft 38 for rotating one damper 35a in the damper group 35a of the annular blowout path 35 is a hollow tube, the tip of which protrudes outside the outlet 31 and the other end of which is inside the cone 33. It is close to the tube. Further, a drive shaft 39 for rotating one damper 34a in the damper group 34a of the central blowout passage 34 penetrates the tubular shaft 38, and its tip has an outlet 31.
And the other end penetrates into the cone 33.

Then, a link mechanism 40 is provided at the tip of each shaft 38, 39,
The respective shafts 38, 39 are rotated by the respective link mechanisms 40 so that the respective dampers 34a, 3
5a is designed to open and close. Explaining each link mechanism 40, each link mechanism 40 is fixed to a tip of an arm 41 attached to the tip of each shaft 38, 39 with a holder 42 such that the axial direction is vertical and the advancing and retracting movement is possible only in the axial direction. One end of each interlocking shaft 43 is pivoted,
At the other end of 43, cam pins 44 are respectively provided so as to project.
A cam disk 45 is provided above each interlocking shaft 43 so that each cam pin 44 can slide in a cam groove 46 provided in the rotatable cam disk 45. And
Each cam disk 45 is fixed to the shaft of a motor 47 and is rotationally driven. Further, the cam groove 46 advances in an arc shape around the outer circumference of the disc, then goes from the end of the arc portion toward the center of the disc 45, makes a U-turn at the center portion of the disc 45 and returns to the start end of the arc portion. With rotation of 45, cam pin
As the 44 slides in the cam groove 46, the interlocking shaft 43 moves back and forth in the vertical direction, the shafts 38 and 39 rotate 90 degrees via the arm 41, and the dampers 34a and 35a open and close. There is. And 2
The cam grooves 46 of the one cam disk 45 are in a positional relationship of being offset from each other by 90 degrees. The motor 47 has a rotary encoder.
48 is installed, the rotation angle is detected and the control device 63
The angle of opening of the dampers 34a and 35a can be specified by inputting to

The above is an example of the conditioned air outlet 31 used in the method of the present invention, but the opening / closing mechanism of the central outlet and the annular outlet can be appropriately changed by using a slide shutter. As shown in FIG. 6, a plurality of conditioned air outlets 31 are arranged on the ceiling of the room to be conditioned, and each of them is connected to the air conditioner 51 via a duct. Also, the room to be air-conditioned is one large room. In addition, the air conditioner 51 sucks the air in the room to be air-conditioned and the outside air, and after air-conditioning, each air-conditioning air outlet
Air-conditioned air is supplied from 31 to the inside of the room, and an air-conditioning coil 52 that also serves as a cooling coil and a heating coil is provided, and a fan 54 whose rotation speed is controlled by an inverter 53 is provided. The air conditioning coil 52 operates as a cooling coil by circulating cold water through the flow rate adjusting valve 55 in summer, and operates as a heating coil by circulating hot water or steam through the flow rate adjusting valve 55 in winter.

The coil 52 may be provided with a cooling coil and a heating coil, respectively. The flow rate control valve 55 of the coil 52 can detect the full opening of the valve 55 and send a full open signal to the control device 63.

Further, in the duct connecting the air conditioner 51 and the air conditioning air outlet 31, there is provided a cooling / heating detecting temperature detecting means 61 for detecting the cooling / heating mode of the air conditioner 51, and on the other hand, in the room to be air conditioned, this room An indoor temperature detecting means 62 for detecting the temperature is provided.

Further, the temperature data from the cooling / heating detection temperature detection means 61 and the indoor temperature detection means 62, the damper opening information from the encoder 48, and the fan 54 of the air conditioner 51 in response to the full open signal from the flow rate control valve 55 are received. The rotation speed and the damper 34a,
A control device 63 for controlling the opening / closing of 35a is provided.

The control device 63 includes a mode determination unit 61a that determines whether the air conditioner 51 is performing a cooling operation or a heating operation based on the temperature data from the cooling / heating detection temperature detection unit 61. The mode may be discriminated manually.

Further, the control device 63, the temperature comparison means 64 for comparing the indoor temperature data from the indoor temperature detection means 62 and the preset temperature, and the water flow of the coil of the air conditioner based on the comparison result of the temperature comparison means 64. The flow rate adjusting valve control means 66 for controlling the air flow rate, the damper based on the comparison result of the temperature comparing means 64 and the opening information (full open information) of the flow rate valve 55.
It has a damper control means 65 for controlling opening / closing of 34a, 35a, and an inverter frequency control means 68 for controlling the amount of air blown from the air conditioner 51 based on damper opening information from the encoder 48.
It is not necessary to provide all of these means 64, 65, 66, 68,
Other than the temperature comparison means 64 and the damper control means 65 are appropriately provided as needed.

Next, an operation example of the present embodiment will be described based on the flowchart of FIG. 7 and the time chart of FIG.

First, the summer cooling mode will be described. The mode discriminating means 61a detects that it is operating in the cooling mode, and informs the control device 63 of this (step 1).

Here, the room temperature to be air-conditioned is set to 25 ° C. in advance. This is input as the set temperature from the input means and stored in the storage means. Then, the supply air temperature is controlled by the flow rate control valve 55 in the minimum air volume operation (mode 5) in which the damper 35a is fully opened and the damper 34a is fully closed (step 2).

Next, the temperature comparison means 64 compares the indoor temperature data constantly read from the indoor temperature detection means 62 with the set temperature (step 3), and in the minimum air volume operation, the flow control valve provided in the coil 52 of the air conditioner 53 is fully opened. If the room temperature is higher than the set temperature, the controller 63
Thus, the opening of the flow rate control valve 55 is increased to supply lower temperature air. When the room temperature is lower than the set temperature, the opening degree of the flow rate control valve 55 is reduced to reduce the amount of cold water (step 4). Even when the flow rate control valve 55 reaches the fully open state, when the indoor temperature is higher than the set temperature, the fully closed damper 34a opens until the flow rate control valve 55 is fully opened (mode 4), and the damper 34a is opened. The frequency of the inverter 53 is increased to increase the number of rotations of the fan 54 in order to increase the air volume corresponding to the opening degree of. Hereinafter, the supply air amount is adjusted by changing the indoor load (step 5). During the maximum air volume operation, the dampers 34a, 35a are opened and the conditioned air outlet 31 is fully opened (step 5 and mode 3).

Next, when the indoor temperature falls below the set temperature, first, the opening of the damper 34a is reduced, and the frequency of the inverter 53 is lowered to reduce the air volume corresponding to the opening, and the frequency of the fan is lowered.
Decrease 54 rpm. (Step 5). Eventually, the damper
Even if 34a reaches the fully closed state, if the room temperature is equal to or lower than the set temperature, the damper 34a should be fully closed and the flow control valve 55 that had been in the fully open state should be made smaller to supply air. Relax the temperature of the cold air (step 4).

In this way, the area of the outlet 31 becomes smaller as the amount of blown air decreases, so that the wind speed at the outlet 31 is maintained at an appropriate speed without decreasing. In addition, the cold air is mainly an annular outlet.
Since it is blown from 35, it is blown outward and is sufficiently diffused in the room as compared with the case of being blown from the central blow passage 34.

Next, the mode discriminating means 61a detects that it is operating in the heating mode even during the heating in winter, and the controller 6
Tell 3 (step 1).

Here, the set temperature is set to 27 ° C. in advance.
Then, the supply air temperature is controlled by the flow rate adjusting valve 55 by the minimum air volume operation in which the damper 34a is fully opened and the damper 35a is fully closed (step 6, mode 1).

Next, as in the previous case, the temperature comparison means 64 compares the indoor temperature with the set temperature (step 7), and when the flow rate adjusting valve provided in the coil 52 of the air conditioner 53 is not fully opened in the minimum air volume operation, When the temperature is lower than the set temperature, the controller 63 increases the flow rate of hot water or steam to supply higher temperature air. When the room temperature is higher than the set temperature, the flow rate of hot water or steam is reduced to supply air in proportion to the room temperature (step 8). Even when the flow rate control valve 55 reaches the fully open state, when the room temperature is lower than the set temperature, the flow rate control valve 55 is fully opened and the damper 35a that has been fully closed until then is opened (mode 2).
The frequency of the inverter 53 is also increased and the rotation speed of the fan 54 is increased in order to increase the air volume corresponding to the opening degree of the. Hereinafter, the amount of air supply is controlled by changing the indoor load (step 9).
During the maximum air volume operation, the dampers 34a, 35a are opened and the conditioned air outlet 31 is fully opened (step 10, mode 3).

Next, when the indoor temperature becomes equal to or higher than the set temperature, first, the opening of the damper 35a is reduced, and the frequency of the inverter 53 is lowered to reduce the air volume corresponding to the opening.
Lower the number of revolutions (step 9). Eventually, the damper 35a
When the room temperature is equal to or higher than the set temperature, the damper 34a is fully closed, and the flow control valve 55, which was previously fully closed, is opened to reduce the air supply. The temperature of warm air to be reduced is relaxed (step 8).

In this way, the area of the outlet 31 becomes smaller as the amount of air blown decreases, so that the wind speed at the outlet 31 is maintained at an appropriate speed without decreasing. In addition, the warm air is mainly in the central outlet 34
Since it is blown directly below, it is blown closer to the floor compared to the case where it is blown out from the annular blowout passage 35, and is sufficiently diffused in the room.

As a result, the present system can significantly reduce the heat energy loss due to the temperature difference between the upper and lower parts of the room.

In addition, in FIG. 9, Modes 6 to 9 are time charts showing the operation during the intermediate period and ventilation, and the air-conditioning air outlet
Centering around the mode 7 when 31 is used, for example, when the indoor temperature is lower than the outside air temperature, the mode is shifted to the mode 6 side, and when the indoor temperature is higher than the outside air temperature, the mode 8 is shifted to the mode 8 side.

<Embodiment 2> In this embodiment, as shown in FIG. 10, the air-conditioning air outlet 31 according to the present invention is installed in each of a plurality of small rooms, and the room temperature is detected in each room. The means 62 is provided. The other points are the same as in the first embodiment.

Therefore, although the operation is almost the same, by providing the air conditioning air outlet 31 for each room, by fully closing the air outlet 31 in the unused room, it is possible to save the heat energy and the air carrier power. can do.

<Embodiment 3 and 4> Although not shown as Embodiment 3 or 4, in Embodiment 1 or 2, the air conditioner 51 and the air conditioning air outlet 31 are replaced with the air conditioner 51 in place of the inverter 53 for air volume adjustment. The VAV unit is inserted in the duct that connects the two. The VAV unit is provided with a damper in the air passage, and the air passage area can be changed by this damper. Except for adjusting the air volume with this VAV unit, the same operation as that of the first or second embodiment is achieved.

<Example 5> The third embodiment, as in FIG. 11, in addition to the configuration of Embodiment 1, the air conditioner and the CO ₂ concentration detection means 71 for detecting a CO ₂ concentration in the room to be conditioned from the room Returning to step 51, provided in the return air duct 72, the control device 63 is accompanied by the CO ₂ concentration comparing means (not shown) for comparing the preset reference CO ₂ concentration with the indoor CO ₂ concentration. Is equipped with. Further, it has a ventilation means 74 which operates when the CO ₂ concentration becomes higher than the reference CO ₂ concentration according to the comparison result of the CO ₂ concentration comparing means. The ventilation means 74 is provided in the air conditioner 51 in the middle of the exhaust duct 75 for exhausting the air taken in from the room to be conditioned, the exhaust valve 76 provided in the exhaust duct 75, and the return air duct 72. A selection valve 77 for selecting either the exhaust duct 75 or the return air duct 72, an outside air intake duct 78 for introducing outside air into the air conditioner 51, and this outside air intake duct 78.
When the CO ₂ concentration becomes higher than the reference concentration, the selection valve 77 is closed by a command from the control unit 63, and the opening degrees of the exhaust valve 76 and the outside air intake valve 79 are fully opened. Accordingly, the air in the room is exhausted from the exhaust duct 75, and fresh outside air is taken in from the outside air intake duct 78, and after being air-conditioned, it is intended to be supplied to the room from the air conditioning air outlet 31.

A circulation fan 81 driven by an inverter 81 is provided in the middle of the circulation duct 72. When the CO ₂ concentration is high, the circulation fan 81 rotates at a high speed depending on the density of CO ₂ , and when the CO ₂ concentration is low, The circulation fan 81 is controlled so as to rotate at a low speed.

〔The invention's effect〕

According to the method of the present invention, the indoor distribution during cooling and heating is improved in energy saving. That is, in the minimum air volume operation mode, by closing the central air outlet and opening the annular air outlet during cooling, the cold air that is going to descend can be spread evenly in the horizontal direction inside the room, and the annular air outlet can be opened during heating. By closing and opening the central outlet, warm air can be lowered once near the feet of the occupants and then diffused, making the temperature environment in the room less variable.

Further, since the appropriate air volume is supplied while considering the indoor air flow distribution according to the indoor load, the comfort of the occupant can be ensured while reducing the power of the air carrying power.

Further, when the blow-out device according to the second aspect is used in the method of the present invention, not only the blowing direction can be suitably adjusted depending on the characteristics of warm air and cold air, but also the blown air volume and the wind speed can be controlled stepwise according to the indoor load.

[Brief description of drawings]

1 to 9 show Embodiment 1 of the present invention, FIG. 1 is a front sectional view showing an air-conditioning air outlet, FIG. 2 is a side cutaway view thereof, and FIG. 3 is a plan sectional view. FIG. 4 is a diagram showing the connected state of the damper, FIG. 5 is a block diagram showing the configuration of the first embodiment, FIG. 6 is a schematic diagram showing the configuration of the first embodiment, and FIG. 7 is the first embodiment. 8 is a flow chart showing the operation of FIG. 8, FIG. 8 is a view showing the operation of the link mechanism, and FIG. 9 is a time chart showing the open / closed state of the damper. FIG. 10 is a schematic diagram showing the configuration of the second embodiment, and FIG. 11 is a schematic diagram showing the fifth embodiment. Further, FIG. 12 is a view showing a conventional example, FIG.
The figure shows another embodiment. 31 …… Blowout port, 33 …… Cone, 34 …… Central outlet, 34a …… Central outlet damper, 35 …… Annular outlet, 35a …… Annular outlet damper, 39 …… Drive shaft, 40 ...... Link mechanism, 47 …… Motor, 51 …… Air conditioner.

Claims (2)

[Claims] 1. An anemo type air outlet 31 comprising a central air outlet 34 and an annular air outlet 35 surrounding the air outlet is provided on the ceiling of a room to be air-conditioned, and the air outlets 34 and 35 of the air outlet 31 are connected to the air conditioner 51. Air conditioning,
A method of air conditioning in a room that blows out conditioned air by opening and closing according to the heating mode.
Is fully opened, and the opening of the central outlet 34 is made variable by following the difference between the set temperature and the room temperature.
34 is fully opened, the opening of the annular blow-out path 35 is made variable by following the difference between the set temperature and the room temperature, and further, during cooling and heating, the air supply from the air conditioner 51 to the outlet 31 is supplied. An air conditioning method characterized in that the air flow rate is changed by following a difference between a set temperature and an indoor temperature. 2. A central blowing passage 34 is defined inside a cylindrical cone 33 whose lower end edge expands outward, and this central blowing passage is formed.
Surrounding 34 to form at least one annular outlet 35,
Each of the blowout paths 34, 35 is provided with a plurality of damper groups 34a, 35a, respectively, and a drive shaft 39 for driving the damper groups 34a, 35a.
Is provided inside and outside the air outlet 31, and on the other hand, a motor 47 that is rotated by a control signal is installed outside the air outlet, and the motion of the motor 47 is transmitted to the drive shaft 39 via a link mechanism 40. An outlet device for use in the air conditioning method according to claim 1.