JP2001241727A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem of a ceiling type air conditioner that hot air does not reach one's feet readily and warm air ascends to the vicinity of ceiling to cause an undue vertical temperature difference thus imparting uncomfortable feeling to residents. SOLUTION: Air outlets 6a-6g are arranged at the outer circumferential part of an air inlet 5 made substantially in the center of a decoration panel 4 and provided with wind direction varying means 7a-7g, respectively. At the time of thermo off, the wind direction varying means 7a-7g are controlled to alter the wind direction upward by a specified value and the air volume is increased by a specified value. Consequently, warm air ascended to the vicinity of ceiling is circulated in the room and vertical temperature difference is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner of a ceiling installation type such as a ceiling mounted type or a ceiling suspended type.

[0002]

2. Description of the Related Art In recent years, ceiling-mounted air conditioners, such as a ceiling-mounted type and a ceiling-suspended type, which perform cooling and heating by directly heating and cooling indoor air, have been widely used not only in stores and offices but also in general households. ing.

[0003] In this ceiling-mounted type air conditioner, blown air is blown down from the vicinity of the ceiling. Generally, high-temperature air tends to rise because of its small density and lightness, and therefore is blown out during heating. Warm air tends not to reach near the floor.

[0004] As a result, there is a problem that an excessive vertical temperature difference occurs during heating, resulting in an uncomfortable environment in which the feet are cold and the head is hot.

A conventional air conditioner is disclosed in Japanese Unexamined Patent Publication No.
No. 4651 is disclosed.

Hereinafter, the conventional air conditioner will be described with reference to the drawings.

FIG. 9 is a longitudinal sectional view of a conventional indoor unit of an air conditioner. FIG. 10 is a front view of a decorative panel of a conventional air conditioner. FIG. 11 is a flowchart showing the operation of the conventional air conditioner.

In FIG. 9, reference numeral 1 denotes an indoor unit embedded in a ceiling surface of a room, 2 denotes a heat exchanger for exchanging heat between a refrigerant and room air, and 3 denotes an air blower for the room air to the heat exchanger 2. It is a blower, and the heat exchanger 2 and the blower 3 are housed inside the indoor unit 1.

Reference numeral 4 denotes a decorative panel provided on the lower surface of the indoor unit 1. 5 is constituted by a filter or the like,
A suction port 6 for drawing indoor air into the interior of the indoor unit 1 by the blower 3, an outlet 6 for sucking air from the inlet 5 and blowing out the air heated or cooled by the heat exchanger 2, and a blower 6 This is a wind direction variable means that can adjust the wind direction of the air blown out from the vertical direction to a desired angle in the vertical direction.

In FIG. 10, reference numeral 8 denotes a room temperature detecting means which is installed near the suction port 5 or inside a remote controller operated by a resident, and detects room temperature. This is a capacity control means for starting and stopping the heating operation based on the set temperature. 10, the heating operation is stopped when the room temperature reaches the set temperature, that is, during the thermo-off, the wind direction is controlled downward by controlling the wind direction variable means 7, and the chiller is controlled by controlling the blower 3 in accordance with the room temperature. This is blowing control means for increasing the amount of air to such an extent that it is not felt.

The operation of the air conditioner configured as described above will be described below with reference to the flowchart of FIG.

First, when a heating operation is started by the air conditioner, room air is sucked from the suction port 5 by the blower 3. Further, the warm air heated by the heat exchanger 2 is blown into the room from the outlet 6 along the wind direction changing means 7. As the time of the heating operation elapses, the warm air that tends to rise due to the low density rises near the ceiling, causing an excessive vertical temperature difference.

Here, in step 1, the room temperature is detected by the room temperature detecting means 8 and compared with the set temperature. When the room is equal to or higher than the set temperature (step 2 is branched to the YES side), the heating operation is performed by the capacity control means 9 in step 3. It stops, and further controls the wind direction variable means 7 by the blow-out control means 10 to lower the wind direction, and controls the blower 3 to increase the air volume.

Further, the room temperature is detected in STEP 4 and the room temperature <
At the set temperature (STEP 5 branches to NO side), the STE
At P6, the heating operation is restarted, and the wind direction variable means 7 is controlled to change the wind direction to the predetermined wind direction, and the blower 3 changes the air flow to the predetermined air volume.

As a result, while the heating operation is stopped, that is, during the thermo-off, the air blowing operation is performed, and the blown air flow direction is directed downward, so that the warm air in the upper part of the room is forcibly circulated into the room. The temperature difference can be reduced.

[0016]

However, in the above-mentioned conventional configuration, when the room temperature detected by the room temperature detecting means 8 reaches a predetermined value and the heating operation is stopped, the blow-out control means 1 is not used.
Since the wind direction variable means 7 is controlled by 0 to direct the wind direction downward, the warm air near the suction port 5 only blows downward, and the warm air that has risen to near the ceiling cannot be circulated indoors. was there. In addition, since the wind direction is downward, there is a drawback that the residents can easily feel the airflow.

The present invention solves the problem of the prior art, in which an air flow during a heating operation stop is blown above the warm air rising near the ceiling, and the warm air rising near the ceiling is circulated into the room to change the vertical temperature difference. It is an object of the present invention to provide an air conditioner capable of further reducing the air conditioner.

Further, the above-mentioned conventional configuration is characterized in that the room temperature detecting means 8
When the room temperature detected by the above reaches a predetermined value and the heating operation is stopped, the blower control unit 10 controls the blower 3 to increase the air volume to such an extent that the chill is not felt according to the room temperature. There is a disadvantage that the occupants feel uncomfortable when the operation sound of the blower 8 is increased when the heating operation is stopped more than during the operation.

Another object of the present invention is to increase the blowing airflow speed while hardly increasing the air flow set value of the blower 3, that is, the operation sound when the heating operation is stopped, and to circulate the warm air that has risen near the ceiling into the room to increase and decrease the airflow. An object of the present invention is to provide an air conditioner capable of further reducing a temperature difference.

Further, the above-mentioned conventional configuration is characterized in that the room temperature detecting means 8
When the room temperature detected by the above reaches a predetermined value and the heating operation is stopped, the blower control unit 10 controls the blower 3 to increase the air volume to such an extent that the chill is not felt according to the room temperature. There is a disadvantage that the occupants feel uncomfortable when the operation sound of the blower 8 is increased when the heating operation is stopped more than during the operation.

Another object of the present invention is to increase the blown air flow velocity without substantially increasing the air flow set value of the blower 3 when the heating operation is stopped, that is, to increase the blown air flow velocity without increasing the operating sound. To provide an air conditioner capable of further reducing the vertical temperature difference by circulating the air in a room.

[0022]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an indoor unit having a built-in variable air volume blower and a heat exchanger, provided on the lower surface of the indoor unit, and substantially at the center. A suction panel, a decorative panel having at least five air outlets on an outer peripheral portion of the air inlet, a wind direction variable means provided rotatably at each of the air outlets, and capable of adjusting a vertical air direction of the blown air; Detecting means, capacity control means for starting and stopping the heating operation based on the room temperature detected by the room temperature detecting means and a preset set temperature, and the heating operation is stopped when the room temperature reaches the set temperature. In the meantime, there is provided a blow-out control means for controlling the wind direction variable means to change the wind direction upward by a predetermined angle, and controlling the blower to increase the air flow set value by a predetermined value.

Thus, a relatively low-temperature airflow at the time of stopping the heating operation can be blown above the warm air rising near the ceiling, and the warm air rising near the ceiling is sufficiently circulated into the room to reduce the vertical temperature difference. It can be further reduced. Further, it is possible to widely blow air in almost all directions of the ceiling surface, and the warm air rising near the ceiling is sufficiently circulated into the room, so that the vertical temperature difference can be further reduced.

Further, the present invention provides a decorative panel provided on a lower surface of an indoor unit and having a suction port at a substantially central portion and at least five air outlets on an outer peripheral portion of the air inlet, and a rotation panel for each of the air outlets. A wind direction variable means that can be freely provided, can adjust the vertical wind direction of the blown air, and can close the outlet, and the wind direction variable means while the room temperature reaches a set temperature and the heating operation is stopped. To close at least one outlet and change the wind direction of the other outlet upward by a predetermined angle.

Thus, in addition to blowing the relatively low-temperature airflow at the time of the stoppage of the heating operation to the upper part of the warm air rising near the ceiling, the blowing air velocity is increased and the warm air near the ceiling is circulated into the room. It further increases, and the vertical temperature difference can be further reduced. In addition, the vertical temperature difference can be reduced without increasing the air volume setting value, and it is possible to prevent the occupants from feeling uncomfortable due to the increase in the blowing noise.

Further, the present invention provides a decorative panel provided on a lower surface of an indoor unit and having a suction port at a substantially central portion and at least five air outlets on an outer peripheral portion of the air inlet, and a rotation panel for each of the air outlets. A wind direction variable means that can be freely provided, can adjust the vertical wind direction of the blown air, and can close the outlet, and the wind direction variable means while the room temperature reaches a set temperature and the heating operation is stopped. To close at least one of the outlets, change the wind direction of the other outlets upward by a predetermined angle, and further comprise outlet control means for changing the outlets to be closed at predetermined intervals.

Thus, in addition to blowing the relatively low-temperature airflow at the time of the stoppage of the heating operation to the upper part of the warm air that has risen near the ceiling, the velocity of the blown air is increased and the warm air near the ceiling is circulated into the room. It further increases, and the vertical temperature difference can be further reduced. In addition, a relatively high-speed blown air flow can be blown out in almost all directions of the ceiling surface, so that a vertical temperature difference can be further reduced. In addition, the vertical temperature difference can be reduced without increasing the air volume setting value, and it is possible to prevent the occupants from feeling uncomfortable due to the increase in the blowing noise.

[0028]

DETAILED DESCRIPTION OF THE INVENTION The invention according to claim 1 of the present invention is directed to an indoor unit having a built-in air blower and a heat exchanger having a variable air volume, provided on the lower surface of the indoor unit, and substantially at the center. A suction panel, a decorative panel having at least five air outlets on an outer peripheral portion of the air inlet, a wind direction variable means provided rotatably at each of the air outlets, and capable of adjusting a vertical air direction of the blown air; Detecting means, capacity control means for starting and stopping the heating operation based on the room temperature detected by the room temperature detecting means and a preset set temperature, and the heating operation is stopped when the room temperature reaches the set temperature. The interval is provided with blow-out control means for controlling the wind direction variable means to change the wind direction upward by a predetermined angle, and controlling the blower to increase the air flow set value by a predetermined value, so that the room temperature reaches a predetermined value. When the heating operation stops, the wind direction rises Since the predetermined angle is changed and the air volume setting value is increased by a predetermined value, a relatively low-temperature airflow at the time of stopping the heating operation can be blown over the warm air that has risen near the ceiling, and the warm air that has risen near the ceiling can be blown indoors. To sufficiently reduce the vertical temperature difference. Also,
Since air is blown out from at least five or more outlets, it is possible to widely blow air in almost all directions of the ceiling surface, and to sufficiently circulate warm air rising near the ceiling into the room to further reduce the vertical temperature difference. Have.

According to a second aspect of the present invention, there is provided an indoor unit having a built-in air blower having a variable air volume and a heat exchanger, a suction port provided at a lower surface of the indoor unit, and a substantially central portion provided with a suction port and a suction port. A decorative panel having at least five air outlets on an outer peripheral portion, and a wind direction variable means provided rotatably at each of the air outlets, capable of adjusting a vertical air direction of the blown air, and closing the air outlet. A room temperature detecting means, a capacity control means for starting and stopping the heating operation based on the room temperature detected by the room temperature detecting means and a preset set temperature, and the heating operation stops when the room temperature reaches the set temperature. While the at least one air outlet is closed by controlling the air flow direction changing means, and the air flow direction of the other air outlet is changed upward by a predetermined angle, and the room temperature is adjusted to a predetermined value. When the heating operation is stopped Since the predetermined angle changes in upward direction,
In addition to blowing the relatively low-temperature airflow during the heating operation stoppage above the warm air that has risen near the ceiling, since at least one air outlet is closed, the airflow velocity at the other air outlets increases due to the reduced airflow area As a result, the effect of circulating warm air near the ceiling into the room is further enhanced, and the effect of further reducing the vertical temperature difference is provided. In addition, since the vertical temperature difference can be reduced without increasing the air volume setting value of the blower, it has the effect of preventing the occupants from feeling uncomfortable due to the increase in the blowing noise.

According to a third aspect of the present invention, there is provided an indoor unit having a built-in variable air volume blower and a heat exchanger, a suction port provided at a lower surface of the indoor unit, and a substantially central portion of the suction port and the suction port. A decorative panel having at least five air outlets on an outer peripheral portion, and a wind direction variable means provided rotatably at each of the air outlets, capable of adjusting a vertical air direction of the blown air, and closing the air outlet. A room temperature detecting means, a capacity control means for starting and stopping the heating operation based on the room temperature detected by the room temperature detecting means and a preset set temperature, and the heating operation stops when the room temperature reaches the set temperature. During the operation, the at least one air outlet is closed by controlling the wind direction variable means, the air direction of the other air outlet is changed upward by a predetermined angle, and the air outlet to be closed is changed every predetermined time. With control means, room temperature When the heating operation is stopped after reaching the predetermined value, the wind direction is changed by a predetermined angle upward, so that in addition to blowing the relatively low-temperature airflow at the time of heating operation stoppage above the warm air rising near the ceiling, Since at least one air outlet is closed, the air flow velocity at the other air outlets increases due to the reduction of the air outlet area, and the effect of circulating warm air near the ceiling into the room is further enhanced, thereby reducing the vertical temperature difference. Have. In addition, since the outlet to be sealed is changed every predetermined time, a relatively high-speed airflow can be blown out in almost all directions of the ceiling surface, and the vertical temperature difference can be further reduced. In addition, since the vertical temperature difference can be reduced without increasing the air volume setting value of the blower, it has the effect of preventing the occupants from feeling uncomfortable due to the increase in the blowing noise.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an air conditioner according to the present invention will be described below with reference to the drawings. The same components as those in the related art are denoted by the same reference numerals, and detailed description is omitted.

(Embodiment 1) FIG. 1 is a longitudinal sectional view of an indoor unit according to Embodiment 1 of the present invention. FIG. 2 is a front view of a decorative panel of the air conditioner of the embodiment. FIG. 3 is a control block diagram illustrating the blowing control of the air conditioner of the embodiment.
FIG. 4 is a flowchart showing the operation of the air conditioner of the embodiment.

In FIG. 2, reference numeral 4a denotes a decorative panel provided on the lower surface of the indoor unit 1 and having a suction port 5 at a substantially central portion and at least five outlets at an outer peripheral portion of the suction port 5. Here, the description will be made assuming that there are seven outlets, and the outlets 6a, 6b,
6c, 6d, 6e, 6f, and 6g. Also, 7a, 7
b, 7c, 7d, 7e, 7f, 7g are the outlets 6a, 6
b, 6c, 6d, 6e, 6f, and 6g are wind direction variable means provided rotatably and capable of adjusting the vertical wind direction of the blown air.

In FIG. 3, reference numeral 9 denotes capacity control means for starting and stopping the heating operation based on the room temperature detected by the room temperature detection means 8 and a preset temperature, and 10a designates a capacity control means for detecting that the room temperature has reached the set temperature. While the heating operation is stopped, the wind direction variable means 7a, 7b, 7c, 7d, 7e, 7f, 7g are controlled to change the wind direction upward by a predetermined angle, and the blower 3 is controlled to adjust the air flow set value. This is a blowing control means that increases by a predetermined value.

The operation of the air conditioner configured as described above will be described below with reference to the flowchart of FIG.

When the heating operation is started under the conditions of the predetermined wind direction and the predetermined air volume, the air sucked from the suction port 5 by the blower 3 is heated by the heat exchanger 2, and the air outlet 6a,
Air is blown into the room from 6b, 6c, 6d, 6e, 6f, 6g along wind direction changing means 7a, 7b, 7c, 7d, 7e, 7f, 7g. As the time of the heating operation elapses, the warm air whose density is small and easily rises rises near the ceiling, and an excessive vertical temperature difference occurs.

Here, in step 1, the room temperature is detected by the room temperature detecting means 8 and compared with the set temperature. When room temperature ≧ set temperature (step 2 is branched to YES), the heating operation is stopped by the capacity control means 9 in step 3. Further, the blow direction control means 10a controls the wind direction changing means 7a, 7b, 7c, 7
By controlling d, 7e, 7f and 7g, the wind direction is changed upward by a predetermined angle, and the blower 3 is controlled to increase the air flow set value by a predetermined value. As a result, a relatively low-temperature airflow when the heating operation is stopped is blown above the warm air rising near the ceiling, and the warm air rising near the ceiling is sufficiently circulated into the room to further reduce the vertical temperature difference. be able to. The wind direction when the angle is changed upward by a predetermined angle is most preferably horizontal to the ceiling surface, and is desirably 0 ° to 30 ° with respect to the ceiling surface.

In addition, since air is blown out from the seven outlets, air can be widely blown in almost all directions of the ceiling surface, and the warm air rising near the ceiling is sufficiently circulated into the room to further reduce the vertical temperature difference. Can be reduced.

Since the warm air near the ceiling falls into the living area, the room temperature in the living area rises. Therefore, by providing the room temperature set value correcting means for correcting the room temperature set value by the predetermined value in the energy saving direction in the capacity control means 9, the living area rooms are equivalent, the operating rate of the heating operation can be reduced, and energy saving can be achieved.

Further, the room temperature is detected in STEP 4 and the room temperature <
At the set temperature (STEP 5 branches to NO side), the STE
At P6, the heating operation is restarted, and the wind direction changing means 7a, 7b, 7
c, 7d, 7e, 7f, 7g are controlled to change to a predetermined wind direction, and the blower 3 changes to a predetermined air volume.

As described above, the air conditioner of the present embodiment is provided with an indoor unit 1 having a built-in air blower 3 and a heat exchanger 2 with a variable air volume, and provided on the lower surface of the indoor unit 1 and substantially at the center. Suction port 5, air outlets 6 a, 6 b, 6 c, 6
decorative panels 4a having d, 6e, 6f, 6g, and air outlets 6a, 6b, 6c, 6d, 6e, 6f, 6g, which are rotatably provided to adjust the vertical wind direction of the blown air. Variable means 7a, 7b, 7c, 7d, 7
e, 7f, 7g, room temperature detecting means 8, and room temperature detecting means 8
And a capacity control means 9 for starting and stopping the heating operation based on the room temperature detected by the controller and a preset temperature, and a wind direction variable means 7a while the room temperature reaches the set temperature and the heating operation is stopped. 7b, 7c, 7d, 7e, 7f, and 7g are controlled to change the wind direction upward by a predetermined angle, and to control the blower 3 to increase the air flow set value by a predetermined value. When the room temperature reaches the predetermined value and the heating operation is stopped, the wind direction is changed upward by a predetermined angle, and the air volume setting value is increased by a predetermined value, so the heating operation at the top of the ceiling rising near the ceiling is compared with when the heating operation is stopped A very low temperature airflow can be blown, and the warm air rising near the ceiling can be sufficiently circulated into the room to further reduce the vertical temperature difference. In addition, since air is blown out from at least five or more outlets, it is possible to widely blow air in almost all directions of the ceiling surface, and to sufficiently circulate warm air rising near the ceiling into the room to further reduce the vertical temperature difference. be able to.

(Embodiment 2) FIG. 5 is a control block diagram showing the blowing control of the air conditioner of the embodiment. FIG. 6 is a flowchart showing the operation of the air conditioner of the embodiment.

In FIG. 5, 11a, 11b, 11c,
11d, 11e, 11f, 11g are the outlets 6a, 6
b, 6c, 6d, 6e, 6f, and 6g are provided rotatably, and can adjust the vertical wind direction of the blown air,
It is a wind direction variable means capable of opening and closing the outlet.

The reference numeral 10b denotes a wind direction changing means 11a, 1b while the room temperature reaches the set temperature and the heating operation is stopped.
A blowout control means for controlling 1b, 11c, 11d, 11e, 11f, 11g to close at least one blowout port and change the wind direction of another blowout port upward by a predetermined value. For example, here, the description will be given on the assumption that the air outlets 6b, 6d, 6f are closed by the wind direction changing means 11b, 11d, 11f.

The operation of the air conditioner configured as described above will be described below with reference to the flowchart of FIG.

When the heating operation is started under the predetermined wind direction and the predetermined air volume condition, the air sucked from the suction port 5 by the blower 3 is heated by the heat exchanger 2, and the air outlet 6a,
6b, 6c, 6d, 6e, 6f, 6g to wind direction changing means 11a, 11b, 11c, 11d, 11e, 11f, 1
It is blown into the room along 1g. As the time of the heating operation elapses, the warm air whose density is small and easily rises rises near the ceiling, and an excessive vertical temperature difference occurs.

First, in step 1, the room temperature is detected by the room temperature detecting means 8 and compared with the set temperature. When room temperature ≧ set temperature (step 2 is branched to YES), the heating operation is stopped by the capacity control means 9 in step 3. Further, the wind direction changing means 11a, 11c, 11 are controlled by the blowing control means 10b.
e, 11g to change the wind direction of the outlets 6a, 6c, 6e, 6g upward by a predetermined angle, and to change the wind direction.
1b, 11d, 11f to control the outlets 6b, 6d, 6
Close f.

As a result, the total blowout area decreases, so that the blown airflow velocity at the blowout ports 6a, 6c, 6e, 6g increases. Therefore, in addition to blowing the relatively low temperature airflow at the time of the heating operation stoppage above the warm air that has risen near the ceiling, the effect of circulating warm air near the ceiling into the room by increasing the blown air flow speed is further enhanced, and the vertical temperature difference Can be further reduced. The wind direction when the angle is changed upward by a predetermined angle is most preferably horizontal to the ceiling surface, and is desirably 0 ° to 30 ° with respect to the ceiling surface.

Further, since the vertical temperature difference can be reduced without increasing the air volume setting value of the blower 3, it is possible to prevent the occupants from feeling uncomfortable due to the increase in the blowing noise.

It is to be noted that, by increasing the air volume setting value of the blower 3 when the heating operation is stopped, a greater vertical temperature difference reduction effect can be obtained.

In addition, since the warm air near the ceiling falls into the living area, the room temperature in the living area rises. Therefore, by providing the room temperature set value correcting means for correcting the room temperature set value by the predetermined value in the energy saving direction in the capacity control means 9, the living area rooms are equivalent, the operating rate of the heating operation can be reduced, and energy saving can be achieved.

Further, the room temperature is detected in STEP 4 and the room temperature <
At the set temperature (STEP 5 branches to NO side), the STE
At P6, the heating operation is restarted, and the wind direction changing means 11a, 11
b, 11c, 11d, 11e, 11f, 11g are controlled to change to a predetermined wind direction.

As described above, the air conditioner of this embodiment is provided with an indoor unit 1 having a built-in air blower 3 and a heat exchanger 2 with a variable air volume, and provided on the lower surface of the indoor unit 1 and substantially at the center. Suction port 5, air outlets 6 a, 6 b, 6 c, 6
d, 6e, 6f, 6g, and a decorative panel 4a, and blow-out ports 6a, 6b, 6c, 6d, 6e, 6f, 6g, which are rotatably provided to adjust the vertical wind direction of the blown air. Wind direction variable means 11 capable of closing the outlet
a, 11b, 11c, 11d, 11e, 11f, 11g
And room temperature detecting means 8, capacity control means 9 for starting and stopping the heating operation based on the room temperature detected by the room temperature detecting means 8 and a preset set temperature, and heating operation when the room temperature reaches the set temperature. While the wind is stopped, the wind direction changing means 11a, 11
b, 11c, 11d, 11e, 11f, and 11g are controlled to close at least one of the outlets and to change the wind direction of the other outlets upward by a predetermined angle. When the heating operation reaches a predetermined value and the heating operation is stopped, the wind direction is changed by a predetermined angle upward, so that a relatively low temperature airflow at the time of the heating operation stop is blown above the warm air rising near the ceiling. In addition, since at least one of the outlets is closed, the effect of circulating warm air near the ceiling into the room further increases due to an increase in the outlet airflow velocity at the other outlets due to the decrease in the outlet area, further reducing the vertical temperature difference. Can be. In addition, since the vertical temperature difference can be reduced without increasing the air volume setting value of the blower 3, it is possible to prevent the occupants from feeling uncomfortable due to the increase in the blowing sound.

(Embodiment 3) FIG. 7 is a control block diagram showing the blowing control of the air conditioner of the embodiment. FIG. 8 is a flowchart showing the operation of the air conditioner of the embodiment.

In FIG. 7, reference numeral 10c designates a wind direction changing means 1 while the room temperature reaches the set temperature and the heating operation is stopped.
1a, 11b, 11c, 11d, 11e, 11f, 11
g is controlled to close at least one outlet, change the wind direction of the other outlet upward by a predetermined angle, and change the outlet to be closed every predetermined time.

For example, here, first, the wind direction changing means 11
The air outlets 6b, 6d, and 6f are closed by b, 11d, and 11f, and after a lapse of a predetermined time, the wind direction changing means 11a, 11f are closed.
The air outlets 6a, 6c, 6e, 6
The description is made assuming that f is closed.

The operation of the air conditioner configured as described above will be described below with reference to the flowchart of FIG.

When the heating operation is started under the predetermined airflow direction and the predetermined airflow condition, the air sucked from the air inlet 5 by the blower 3 is heated by the heat exchanger 2 and the air outlet 6a,
6b, 6c, 6d, 6e, 6f, 6g to wind direction changing means 11a, 11b, 11c, 11d, 11e, 11f, 1
It is blown into the room along 1g. With the elapse of the heating operation, warm air whose density is small and easily rises rises near the ceiling, and an excessive vertical temperature difference occurs.

Here, in step 1, the room temperature is detected by the room temperature detecting means 8 and compared with the set temperature. When room temperature ≧ set temperature (step 2 is branched to YES), the heating operation is stopped by the capacity control means 9 in step 3. . In addition, STE
At P4, the blowing direction control means 10c controls the wind direction changing means 11b,
The outlets 6b, 6d, 6f are closed by controlling 11d, 11f.

As a result, the total blowout area decreases, so that the blown airflow velocity at the blowout ports 6a, 6b, 6e, 6g increases. Therefore, in addition to blowing the relatively low temperature airflow at the time of the heating operation stoppage above the warm air that has risen near the ceiling, the effect of circulating warm air near the ceiling into the room by increasing the blown air flow speed is further enhanced, and the vertical temperature difference Can be further reduced. The wind direction when the angle is changed upward by a predetermined angle is most preferably horizontal to the ceiling surface, and is desirably 0 ° to 30 ° with respect to the ceiling surface.

Further, timer counting is started, and after a predetermined time elapses (STEP 6 branches to YES side),
In step 8, the timer is reset, and in step 8, the blowing direction control means 10c controls the wind direction changing means 11a, 11c, 11e, 1
1f is controlled to close the outlets 6a, 6c, 6e, 6f.

As a result, the outlets 6a, 6c, 6e, 6f
The warm air in the blowing direction can be circulated to the indoor living area.

That is, since the outlet to be sealed is changed every predetermined time, a relatively high-speed airflow can be blown out in almost all directions of the ceiling surface, and the vertical temperature difference can be further reduced.

Further, since the vertical temperature difference can be reduced without increasing the air volume setting value of the blower 3, it is possible to prevent the occupants from feeling uncomfortable due to the increase in the blowing noise.

By increasing the air flow set value of the blower 3 when the heating operation is stopped, a greater effect of reducing the vertical temperature difference can be obtained.

In addition, since the warm air near the ceiling falls into the living area, the room temperature in the living area rises. Therefore, by providing the room temperature set value correcting means for correcting the room temperature set value by the predetermined value in the energy saving direction in the capacity control means 9, the living area rooms are equivalent, the operating rate of the heating operation can be reduced, and energy saving can be achieved.

Further, the room temperature is detected in STEP 9 and the room temperature <
At the set temperature (STEP 10 branches to NO side), ST
The heating operation is restarted in EP11, and the wind direction changing means 11a, 1
1b, 11c, 11d, 11e, 11f, 11g are controlled to change to a predetermined wind direction.

As described above, the air conditioner according to the present embodiment is provided on the indoor unit 1 having the variable air volume blower 3 and the heat exchanger 2 and on the lower surface of the indoor unit 1, and the suction is substantially at the center. Mouth 5,
Outlets 6a, 6b, 6c, 6d, 6
e, 6f, 6g, decorative panel 4a, and outlet 6
a, 6b, 6c, 6d, 6e, 6f, and 6g are provided rotatably, can adjust the vertical wind direction of the blown air, and have the outlets 6a, 6b, 6c, 6d, 6e, 6
wind direction changing means 11a, 11b, 1 capable of closing f, 6g
1c, 11d, 11e, 11f, 11g; room temperature detecting means 8; capacity control means 9 for starting and stopping heating operation based on the room temperature detected by room temperature detecting means 8 and a preset temperature; While the heating reaches the set temperature and the heating operation is stopped, the wind direction changing means 11a, 11b, 11c, 11
outlet control for controlling at least one of the outlets by controlling d, 11e, 11f, and 11g, changing the wind direction of the other outlet upward by a predetermined angle, and changing the outlet to be closed every predetermined time; When the heating operation is stopped when the room temperature reaches a predetermined value and the heating operation is stopped, the wind direction is changed upward by a predetermined angle, so that when the heating operation is stopped above the warm air rising near the ceiling. Since at least one outlet is closed in addition to blowing a relatively low-temperature airflow, the effect of circulating warm air near the ceiling into the room by increasing the outlet airflow velocity at other outlets due to a decrease in the outlet area is further increased. As a result, the vertical temperature difference can be further reduced.

Further, since the outlet to be sealed is changed every predetermined time, a relatively high-speed blown air can be blown out in almost all directions of the ceiling surface, and the vertical temperature difference can be further reduced. In addition, since the vertical temperature difference can be reduced without increasing the air volume setting value of the blower 3, it is possible to prevent the occupants from feeling uncomfortable due to the increase in the blowing sound.

[0070]

As described above, the invention according to claim 1 is an indoor unit having a built-in variable air volume blower and a heat exchanger, provided on the lower surface of the indoor unit, and substantially at the center. A suction panel, a decorative panel having at least five air outlets on an outer peripheral portion of the air inlet, a wind direction variable means provided rotatably at each of the air outlets, and capable of adjusting a vertical air direction of the blown air; Detecting means, capacity control means for starting and stopping the heating operation based on the room temperature detected by the room temperature detecting means and a preset set temperature, and the heating operation is stopped when the room temperature reaches the set temperature. In the meantime, by controlling the wind direction variable means to change the wind direction upward by a predetermined value, and by providing blowout control means for controlling the blower to increase the air flow set value by a predetermined value, the room temperature reaches a predetermined value. When heating operation stops, wind direction is increased. Direction, and the airflow set value is increased by a predetermined value, so that a relatively low-temperature airflow at the time of stopping heating operation can be blown over the warm air that has risen near the ceiling, and the warm air that has risen near the ceiling can be blown. It can be sufficiently circulated indoors to further reduce the vertical temperature difference. In addition, since air is blown out from at least five or more outlets, it is possible to widely blow air in almost all directions of the ceiling surface, and to sufficiently circulate warm air rising near the ceiling into the room to further reduce the vertical temperature difference. be able to.

In addition, since the warm air near the ceiling falls into the living area, the room temperature in the living area rises. Therefore, by providing the room temperature set value correcting means for correcting the room temperature set value by the predetermined value in the energy saving direction in the capacity control means 9, the living area rooms are equivalent, the operating rate of the heating operation can be reduced, and energy saving can be achieved.

The invention according to a second aspect of the present invention is directed to an indoor unit having a built-in air blower and a heat exchanger having a variable air volume, a suction port provided at a lower surface of the indoor unit, and a suction port and a suction port substantially at a central portion. A decorative panel having at least five air outlets on an outer peripheral portion of a mouth, and a variable wind direction that is rotatably provided at each of the air outlets so that a vertical air direction of the blown air can be adjusted and the air outlet can be closed. Means, a room temperature detecting means, a capability control means for starting and stopping the heating operation based on the room temperature detected by the room temperature detecting means and a preset set temperature, and a heating operation when the room temperature reaches the set temperature. While stopped, control the wind direction variable means to close at least one outlet,
By providing the air outlet control means for changing the wind direction of the other outlet upward by a predetermined angle, when the room temperature reaches a predetermined value and the heating operation is stopped, the wind direction is changed upward by a predetermined angle. In addition to blowing a relatively low-temperature airflow at the time of heating operation stoppage over the warm air that has risen to the vicinity, since at least one outlet is closed, the outlet airflow speed at the other outlets increases due to a decrease in the outlet area. Thus, the effect of circulating warm air near the ceiling into the room is further enhanced, and the vertical temperature difference can be further reduced. In addition, since the vertical temperature difference can be reduced without increasing the air volume setting value of the blower, it is possible to prevent the occupants from feeling uncomfortable due to the increase in the blowing sound.

By increasing the air flow setting value of the blower 3 when the heating operation is stopped, a greater effect of reducing the vertical temperature difference can be obtained.

In addition, since the warm air near the ceiling falls into the living area, the room temperature in the living area rises. Therefore, by providing the room temperature set value correcting means for correcting the room temperature set value by the predetermined value in the energy saving direction in the capacity control means 9, the living area rooms are equivalent, the operating rate of the heating operation can be reduced, and energy saving can be achieved.

The invention according to a third aspect of the present invention is directed to an indoor unit having a built-in air blower and a heat exchanger having a variable air volume, a suction port provided at a lower surface of the indoor unit, and a suction port and a suction port substantially in the center. A decorative panel having at least five air outlets on an outer peripheral portion of a mouth, and a variable wind direction that is rotatably provided at each of the air outlets so that a vertical air direction of the blown air can be adjusted and the air outlet can be closed. Means, a room temperature detecting means, a capability control means for starting and stopping the heating operation based on the room temperature detected by the room temperature detecting means and a preset set temperature, and a heating operation when the room temperature reaches the set temperature. While stopped, control the wind direction variable means to close at least one outlet,
Change the wind direction of the other outlets upward by a predetermined angle,
By providing the outlet control means for changing the outlet to be closed every predetermined time, when the room temperature reaches the predetermined value and the heating operation is stopped, the wind direction is changed upward by a predetermined angle,
In addition to blowing the relatively low-temperature airflow during the heating operation stoppage above the warm air that has risen near the ceiling, since at least one air outlet is closed, the airflow velocity at the other air outlets increases due to the reduced airflow area As a result, the effect of circulating warm air near the ceiling into the room is further enhanced, and the vertical temperature difference can be further reduced. In addition, since the outlet to be sealed is changed every predetermined time, a relatively high-speed airflow can be blown out in almost all directions of the ceiling surface, and the vertical temperature difference can be further reduced. In addition, since the vertical temperature difference can be reduced without increasing the air volume setting value of the blower, it is possible to prevent the occupants from feeling uncomfortable due to the increase in the blowing sound.

It should be noted that a greater effect of reducing the vertical temperature difference can be obtained by increasing the air flow setting value of the blower when the heating operation is stopped.

In addition, since the warm air near the ceiling falls into the living area, the room temperature in the living area rises. Therefore, by providing the room temperature set value correcting means for correcting the room temperature set value by the predetermined value in the energy saving direction in the capacity control means, the living room is equivalent, the operating rate of the heating operation is reduced, and energy saving can be achieved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an indoor unit of an air conditioner according to a first embodiment of the present invention.

FIG. 2 is a front view of a decorative panel of the air conditioner of the embodiment.

FIG. 3 is a control block diagram showing blowout control of the air conditioner of the embodiment.

FIG. 4 is a flowchart showing the operation of the air conditioner of the embodiment.

FIG. 5 is a control block diagram of Embodiment 2 of the air conditioner according to the present invention.

FIG. 6 is a flowchart showing the operation of the air conditioner of the embodiment.

FIG. 7 is a control block diagram of Embodiment 3 of the air conditioner according to the present invention.

FIG. 8 is a flowchart showing the operation of the air conditioner of the embodiment.

FIG. 9 is a longitudinal sectional view of an indoor unit of a conventional air conditioner.

FIG. 10 is a front view of a decorative panel of a conventional air conditioner.

FIG. 11 is a flowchart showing the operation of a conventional air conditioner.

[Explanation of symbols]

Reference Signs List 1 indoor unit 2 heat exchanger 3 blower 4 decorative panel 5 inlet 6a, 6b, 6c, 6d, 6e, 6f, 6g outlet 7a, 7b, 7c, 7d, 7e, 7f, 7g wind direction variable means 8 room temperature detecting means 9 Capacity control means 10a, 10b, 10c Blow-out control means 11a, 11b, 11c, 11d, 11e, 11f, 1
1g Wind direction variable means

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Masataka Oda 4-2-5 Takaidahondori, Higashiosaka-shi, Osaka Matsushita Refrigeration Co., Ltd. F-term (reference) 3L060 AA06 CC02 DD07 EE01

Claims (5)

[Claims] 1. An indoor unit having a built-in air blower and a heat exchanger having a variable air volume, a suction port provided at a lower surface of the indoor unit, a suction port at a substantially central portion, and at least five blowers at an outer peripheral portion of the suction port. A decorative panel having an outlet, a wind direction variable means provided rotatably at each of the outlets and capable of adjusting a vertical wind direction of the blown air, a room temperature detecting means, and a room temperature detected by the room temperature detecting means. Capacity control means for starting and stopping the heating operation based on the set temperature, and controlling the wind direction variable means to increase the wind direction while the room temperature reaches the set temperature and the heating operation is stopped. An air conditioner further comprising: a blowout control means for changing a predetermined angle and controlling the blower to increase a set air volume by a predetermined value. 2. An indoor unit having a built-in variable air volume blower and a heat exchanger, a suction port provided at a lower surface of the indoor unit, a substantially central part, and at least five blowers at an outer peripheral part of the suction port. A decorative panel having an outlet, rotatably provided at each of the outlets, capable of adjusting a vertical wind direction of the blown air, and a wind direction variable means capable of closing the outlet, a room temperature detecting means, A capacity control unit for starting and stopping the heating operation based on the room temperature detected by the room temperature detection unit and a preset temperature, and the wind direction variable while the room temperature reaches the set temperature and the heating operation is stopped. An air conditioner comprising an air outlet control means for controlling means for closing at least one air outlet and changing a wind direction of another air outlet upward by a predetermined angle. 3. An indoor unit having a variable air volume blower and a heat exchanger built therein, a suction port provided at a lower surface of the indoor unit, a substantially central portion, and at least five blowers at an outer peripheral portion of the suction port. A decorative panel having an outlet, a wind direction variable means provided rotatably at each of the outlets, capable of adjusting a vertical wind direction of the blown air, and capable of closing the outlet, a room temperature detecting means, A capacity control unit for starting and stopping the heating operation based on the room temperature detected by the room temperature detection unit and a preset temperature, and the wind direction variable while the room temperature reaches the set temperature and the heating operation is stopped. Means for controlling the means to close at least one outlet, change the wind direction of the other outlet upward by a predetermined angle, and further comprise outlet control means for changing the outlet to be closed every predetermined time. A characteristic air conditioner. 4. The air conditioner according to claim 2, wherein the blowout control means controls the blower to increase the airflow set value by a predetermined value. 5. The air conditioner according to claim 1, further comprising room temperature set value correcting means for correcting the room temperature set value of the capacity control means by a predetermined value in the energy saving direction. Machine.