JP2001041557A - Airflow direction control method of air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the airflow direction control method of an air conditioner, which is capable of controlling an indoor atmosphere uniformly without spoiling comfortable property. SOLUTION: The airflow up-and-down controlling vanes of an air conditioner are divided into three divisions in the horizontal direction of the same, and are constituted of a central airflow direction up-and-down control vane 19a and left-and-right airflow direction up-and-down control vanes 19b. In such an air conditioner, the angles of a plurality of airflow direction left-and-right control vanes 20 are set so that the directions of outlet airflow are directed outward while the angles of airflow up-and- down control vanes divided into three divisions, are controlled so as to be moved within 90 deg., and the angle θa of the central airflow direction up-and-down control vanes is set so as to be larger than the angle θb. Upon heating operation, the angle θa is set so as to be not smaller than 30 deg. and not larger than 80 deg. while the angle θa is set so as to be larger than the angle θb by 5 deg. or more whereby the angle of outlet air flow is widened and the arriving distance of the airflow is increased thereby heating the inside of a room uniformly to the corners of the same. Upon dehumidifying operation, the angle θa is set so as to be not less than 90 deg. while the angle θb is set so as to be not larger than 0 deg. in order to eliminate the feeling of airflow, which is given to inhabitants.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling an air conditioner, and more particularly, to a method for controlling a wind direction of an air conditioner capable of uniformly controlling an indoor environment without impairing comfort.

[0002]

2. Description of the Related Art When an indoor environment is controlled by an air conditioner, it is important to uniformly control the indoor environment without causing discomfort to residents. For example, during heating operation,
It is desirable that the room be uniformly heated to every corner without generating noise. In addition, during the dehumidifying operation, it is desirable that the humidifier can uniformly dehumidify without giving a sense of wind speed so that the resident does not feel chills.

Conventionally, in order to uniformly control the indoor environment,
The following wind direction control method was used. FIG.
It is sectional drawing which shows the indoor unit of the conventional air conditioner. FIG.
1, 1 is a front cover, 2 is an air inlet, 3 is a heat exchanger, 4 is a blower fan, 5 is a rear guider, 6 is a stabilizer, and 8 is an air outlet.

[0004] The air introduced from the air inlet 2 by the blower fan 4 is sent out from the air outlet 8 through the blower path 7 formed by the stabilizer 6 and the rear guider 5. A plurality of wind direction left and right blades 10 are rotatably supported in the vicinity of the air outlet 8 so as to be rotatable in the left and right directions, and change the flow of the wind horizontally. Further, a lower wind improvement blade 9 is rotatably supported in the air outlet 8 in a vertically rotatable manner, and changes the flow of the wind in the vertical direction.

FIGS. 15A and 15B are schematic diagrams showing the states of the wind direction left and right blades 10 and the wind enhancement lower blade 9. The wind direction left and right blades 10 are arranged on both sides with the center of the air outlet 8 as a boundary.
3 are connected.

[0006] In order to uniformly heat the room, it is necessary to widen the air blowing flow so that the air can reach the corners of the room. Therefore, conventionally, at the time of heating, FIG.
As shown in (a), the angle of the wind direction left and right blades 10 is set to a C-shaped position where the leeward side spreads when viewed from above the front, and the angle of the wind improvement lower blades 9 is set to an obliquely downward position. A wide-angle outlet flow was formed.

[0007] When dehumidifying the interior of a room, it is desirable to keep the resident from blowing airflow so that the resident does not feel a cool wind. Therefore, conventionally, at the time of dehumidification, FIG.
As shown in (b), the angle of the wind direction left and right blades 10 is set to a C-shaped position as viewed from above in front, and the angle of the wind enhancement lower blade 9 is set to be horizontal, as in heating.
The wind direction was controlled so that the outlet stream did not hit the residents.

[0008]

However, the above-mentioned prior art has the following problems. First, in the case of heating, there is a certain limit in widening the blowout flow by the wind direction left and right blades 10, and it is difficult to widen the angle beyond about 110 degrees as schematically shown in FIG.
Further, when the blowout flow is widened by the wind direction left and right blades 10, the forward reach of the blowout flow becomes short. Therefore, when heating a large room, there is a problem that a low-temperature region remains in a corner of the room as shown in FIG. Increasing the air flow can extend the reach of the blowout flow, but increases noise.

On the other hand, in the case of performing dehumidification, since a wind leaks from between the wind direction left and right blades 10, a blowout flow in the front direction remains, and the sense of airflow given to the occupant can be sufficiently reduced. It was difficult. In addition, if the remaining frontal blow-off flow is to be completely blocked by the wind-enhancing lower blade 9 or the like, there is a problem that the wind-enhancing lower blade 9 or the like forms dew or generates turbulent noise. .

The present invention has been made in view of the above problems, and has as its object to provide a wind direction control method for an air conditioner capable of uniformly controlling the indoor environment without impairing comfort.

[0011]

According to a first aspect of the present invention, there is provided a wind direction control method comprising: an indoor heat exchanger, an air blower fan, and an air outlet. A wind-enhancing lower blade that is rotatably supported in a vertical direction and changes the wind direction in a vertical direction, and a plurality of wind directions that are rotatably supported in a horizontal direction near an air outlet and changes the wind direction in a horizontal direction. In the air conditioner having a blade, wherein the lower wind improving blade is divided into three in the horizontal direction, the angles of the plurality of wind direction left and right blades are set to positions at which the outgoing wind direction is outward, and the three divided Assuming that the angle of the lower wind improving lower blade is 0 degree horizontally and 90 degrees vertically lower, the angle θa of the central lower wind improving lower blade is the angle θb of the right and left lower wind improving lower blades.
It is characterized in that it is set to be larger than.

Further, the wind direction control method according to claim 2 is
During the heating operation, θa is set to 30 degrees or more and 80 degrees or less, and θa
Is set at least 5 degrees larger than θb.

Further, in the wind direction control method according to the third aspect, when the temperature of the indoor heat exchanger is in a low temperature section or a high temperature section during the heating operation, θa and θb are set to be substantially the same. When the temperature of the indoor heat exchanger is in the middle temperature section,
It is characterized in that θa is set at least 5 degrees larger than θb.

Furthermore, in the wind direction control method according to a fourth aspect, during the heating operation, before the temperature of the indoor heat exchanger is stabilized, θa and θb are set to be substantially the same, while the indoor heat exchanger is set. After the temperature is stabilized, θa is set to be 5 degrees or more larger than θb.

The wind direction control method according to claim 5 is
In the dehumidifying operation, θa is an angle at which the blowing direction is substantially downward, and θb is an angle at which the blowing direction is substantially horizontal.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an indoor unit of an air conditioner according to a control method of the present invention, and FIG.
FIG. 3 is a sectional view taken along line I. 1 and 2, 1 is a front cover, 2 is an air inlet, 3 is an indoor heat exchanger, 4 is a blower fan, 5 is a rear guider, 6 is a stabilizer, and 8 is an air outlet. The air introduced from the air inlet 2 by the blower fan 4 is sent out from the air outlet 8 through the blower path 7 formed by the stabilizer 6 and the rear guider 5. In the vicinity of the air outlet 8, a plurality of wind direction left and right blades 20 are rotatably supported in the left and right directions to change the flow of the wind in the horizontal direction (left and right direction). These wind direction left and right blades 20 are rotationally driven by a stepping motor or the like. In addition, the air outlet 8 has lower wind improving blades 19a and 19b rotatably supported in the vertical direction, and changes the flow of the wind in the vertical direction (vertical direction). The wind enhancement lower blade is divided into three parts in the horizontal direction, and includes a central wind enhancement lower blade (central wind enhancement lower blade) 19a and left and right wind enhancement lower blades (left and right wind enhancement lower blade) 19b. The lower left and right wind improving blades 19b rotate independently of the lower left and right wind improving blades 19b while the lower left and right wind improving lower blades 19b interlock with each other. They are,
For example, it is driven by a stepping motor or the like.

FIG. 3 is a top view showing the wind direction left and right blades 20 and the wind enhancement lower blades 19a and 19b. The left and right wind direction blades 20 are disposed on both sides of the center of the air outlet 8 and are connected by a connecting bar 23 so as to interlock with each section.

FIG. 4 is a schematic view showing the angle setting of the wind improvement lower blades 19a and 19b. The wind direction control method according to the present invention sets the angle of the wind direction left and right blades 20 to a position where the wind direction to be sent is outward, and the wind improvement lower blade 19a.
And the angle of 19b is set to 0 degree horizontally and 90 degrees vertically downward, so that the angle θa of the central wind improvement lower blade 19a is larger than the angle θb of the left and right wind improvement lower blades 19b. . By controlling the wind direction blade at such an angle, the indoor environment can be uniformly controlled without impairing the comfort.

Embodiment 1 First, a case where a heating operation is performed will be described. When performing the heating operation, as shown in FIGS. 5A and 5B, the wind direction left and right blades 20 are set at a predetermined outward angle (for example, about 1 outward).
5 °), the angle θa of the central wind improving lower blade 19a is set to 30 ° or more and 80 ° or less, and the angle θa of the central wind improving lower blade 19a is set to the angle θ of the left / right wind improving lower blade 19b.
It is set to be 5 degrees or more than b.

FIG. 6 is a schematic diagram showing the blowout flow obtained by setting the angle of the wind direction blade. The main flow of the blowing flow is about 90
° spread. In addition, the wind improving lower blade 19a of the wind improving lower blade 19a
The blowoff flow passing near b and the wind improvement lower blade 19b becomes a underflow and further spreads about 30 degrees left and right. Therefore, the underflow can widen the divergence angle of the blow flow to the left and right to about 120 degrees. The reason why the blowout flow spreads right and left when passing through the wind improving lower blade 19b in the vicinity of the wind improving lower blade 19a and the wind improving lower blade 19b is the central wind improving lower blade 1.
This is because the airflow flowing along the lower surface of the lower left and right wind improving lower blades 19b in the vicinity of the lower right and left wind improving lower blades 19b is attracted outward by the attraction of the airflow flowing along the lower surface of the left and right wind improving lower blades 19b.

As schematically shown in FIG. 7, the blowout flow (main flow) from the center of the air conditioner 25 is directed to the floor surface in the same manner as the conventional wind direction control method, or to the conventional wind direction control method. Can be reached farther than. In addition, the air conditioner 25
The blow-off flow (underflow) from the left and right portions is sent out more in the left-right direction than the central portion to widen the angle. Therefore, it is possible to heat a large room substantially uniformly by widening the angle of the blowout flow and increasing the reach of the blowout flow of the air conditioner.

FIG. 8 shows the angle θ of the lower blade 19b for improving the left and right wind.
It is a graph which shows the relationship between b and a floor surface temperature distribution area ratio.
Here, the floor surface temperature distribution area ratio is a ratio of the floor surface area that is equal to or higher than a predetermined set temperature (here, 26 ° C. or higher) with respect to the floor area of the entire room, and indicates the uniformity of the indoor temperature. It is an indicator. In FIG. 8, a graph 26 shows the floor temperature distribution area ratio when the angle θa of the central wind enhancement lower blade 19a is fixed to 55 degrees and the left and right wind enhancement lower blades 19b are independently moved. The graph 27 shows the right and left wind improvement lower blade 19b.
And the central wind improving lower blade 19a have the same angle setting (θa = θ
The figure shows the floor surface temperature distribution area ratio when moved in b), that is, when the same wind direction control as in the past is performed. As can be seen from FIG. 8, in the range of θb <55 degrees, that is, in the range in which the angle θa (= 55 degrees) of the central wind improving lower blade is larger than the angle θb of the left and right wind improving lower blades, the conventional wind direction control method is more effective. The uniformity of the room temperature distribution is improved. Further, in order to improve the uniformity of the indoor temperature distribution, the difference (θa−θ) between the angle θa of the lower central blade for improving the central wind and the angle θb of the lower blade for improving the left and right wind is required.
b) is 5 degrees or more, more preferably 5 degrees or more and 45 degrees or less,
More preferably, it is desirable that it is 10 degrees or more and 30 degrees or less.

FIGS. 9A and 9B are temperature distribution diagrams showing an example of a floor surface temperature distribution when heating is performed using the conventional wind direction control method and the wind direction control method of the present invention. FIG.
(A) shows the floor surface temperature distribution when θa = θb = 34 degrees, that is, when the conventional wind direction control is performed. FIG. 9B
Shows the floor temperature distribution when θa = 55 degrees and θb = 34 degrees, that is, when the wind direction control according to the present invention is performed. As can be seen from FIGS. 9A and 9B, by performing the wind direction control method of the present invention, it is possible to reduce the low-temperature region in the corners of the room and uniformly heat the room.

Next, an example of the wind direction control during the heating operation using the wind direction control method of the present invention will be described. FIG.
0 is a block diagram showing a control system for performing wind direction control.
The control unit 35 includes a wind direction setting input means 30, an indoor temperature setting input means 32, an indoor temperature detecting means 33, an indoor pipe temperature detecting means 34, and a central wind improving lower blade angle changing means 36 each driven by a stepping motor. The left and right wind improving lower blade angle changing means 37 and the wind direction left and right blade angle changing means 40 are electrically connected.

FIGS. 11 and 12 show the control unit 3 during the heating operation.
5 is a flowchart showing wind direction control by a fifth embodiment. Lower central blade 19a according to user settings, room temperature, etc.
"Wide drive" to drive the lower left and right wind improving lower blades 19b stepwise to send a wide-angle blowout flow, or "normal drive" to drive the central wind improving lower blades 19a and the left and right wind improving lower blades 19b at the same angle. To decide. First, step S
In 1, the input value of the wind direction setting and the input value of the room temperature setting ( _tr0
(° C)) is updated. The wind direction setting is for setting the direction of the blowout flow desired by the user, and is divided into "automatic" and "manual".

Next, in step S2, if the wind direction setting is not "automatic", the flow proceeds to step S6 to perform normal driving, while if the wind direction setting is "automatic", the flow proceeds to step S3. .

Next, in step S3, the room temperature t
After detecting the _r (° C.), the process proceeds to step S4, based on the difference of the room temperature t _r and the interior temperature setting input value t _r0, 5 consecutive minutes _{(t r -t r0)> -} 2.0 It is determined whether or not (° C.) is satisfied. If not, the process proceeds to step S6 to perform normal driving, while if it is satisfied, the process proceeds to step S5 to perform wide driving.

In step S4, it is determined whether or not the room temperature is stable, and the wide drive is not performed until the room temperature is stabilized. This is because, in the wide drive, the amount of air blown is limited, and the heating capacity of the air conditioner is reduced, so that if the wide drive is performed before the indoor temperature is stabilized, the indoor temperature near the lower portion of the air outlet 8 will not easily rise. .

Wide drive of step S5 and step S5
In the normal drive of No. 6, the central wind improving lower blade 19 is set based on the settings determined for each of the indoor pipe temperature (= indoor heat exchanger temperature) areas A, B, C, D and E shown in FIG.
a, the angles of the left and right wind improvement lower blades 19b and the wind direction left and right blades 20 are set. The level of the temperature of the indoor piping has a correlation with the level of the temperature of the blowout flow. In order to prevent hunting, the boundary temperature of each region is given a difference of 3 to 4 ° C. when the temperature rises and when the temperature falls.

Table 1 shows the setting of the angle of the wind direction blade in each temperature range when the wide drive is performed in step S5.

[Table 1]

As shown in Table 1, the indoor pipe temperature t
_{When p} (° C.) is in the low temperature region (region A, B or C), the angle θa of the central wind improving lower blade is changed to the left / right wind improving lower blade angle θ.
Same as b. In the area A, the wind improvement lower blade is set upward (θa = θb = 10 °) in order to prevent the blowout flow from hitting the resident because the temperature of the blowout flow is low. In the area C, since the temperature of the outlet stream is appropriately rising, the outlet stream is sent toward the living space. When the indoor piping temperature is in the middle temperature range (region D), the angle θa of the lower central wind improving lower blade is set to be larger than the angle θb of the left and right wind improving lower blades to uniformly warm the entire room. When the indoor piping temperature further rises and enters the high temperature region (region E), the angle θa of the lower central wind enhancement lower blade is made the same as the angle θb of the left and right wind enhancement lower blade again. This is because if the wind improvement lower blade is driven stepwise in a high temperature range, the refrigeration cycle is likely to be overloaded because the air volume is limited.

Table 2 shows the setting of the angle of the wind direction blade in each temperature range when normal driving is performed in step S6.

[Table 2]

Embodiment 2 Next, a case where a dehumidifying operation is performed will be described. When performing dehumidification, as described above, it is desirable not to give the resident a sense of airflow so that the resident in the room does not feel chilly. Further, even if there is no convection of air due to the blowing flow, the indoor humidity is made uniform by the diffusion phenomenon of moisture. Therefore, at the time of dehumidification, it is desirable that the blowout flow is close to a non-airflow. However, if the air outlet is simply closed by the wind direction left and right blades and the wind improvement lower blades to make the blowout flow airless, dew condensation occurs on the wind improvement lower blades and the like, and turbulent noise (buzziness noise) generated by the blower fan. There is a problem that occurs.

Therefore, in the present invention, the wind direction vanes are set at the following angles. First, the wind direction left and right blades 20
As shown in FIG. 13 (a), a predetermined outward angle (for example, an outward
(Around 0 degrees). Wind improvement lower blades 19a and 19b
As shown in FIGS. 13B and 13C, the closing position of the air outlet (θa = 1) is set by setting the angle θa of the central wind enhancement lower blade 19a to 90 degrees or more so that the blowing direction is substantially directly below.
40 °), while improving the left and right wind while lower blade 19b
Is set to 0 degrees or less, and the blowout flow is released substantially horizontally or upward from the left and right portions of the air outlet 8. By setting the wind direction vanes, it is possible to almost eliminate the airflow toward the resident without causing the problem of dew condensation or turbulent sound.

[0035]

The present invention has the following effects because it is configured as described above. According to the wind direction control method according to claim 1 of the present invention, the angles of the plurality of wind direction left and right blades are set at positions where the wind direction to be sent is outward, and the angle θa of the central wind improvement lower blade is Since the angle is set to be larger than the angle θb of the left and right wind improving lower blades, the indoor environment can be uniformly controlled without giving the occupant a discomfort.

According to the wind direction control method of the present invention, in the heating operation, θa is set to 30 degrees or more and 80 degrees or less, and θa is set to 5 degrees or more than θb, so that the blowout flow is widened. And at the same time, the reaching distance can be lengthened, and the corners in the room can be heated evenly.

Further, according to the wind direction control method of the third aspect, during the heating operation, when the temperature of the indoor heat exchanger is in the low temperature section or the high temperature section, θa and θb are set to be substantially the same. When the temperature of the indoor heat exchanger is at the middle temperature, θa is set to be 5 degrees or more larger than θb, so that problems such as overload of the air conditioner can be avoided.

Further, according to the wind direction control method of the present invention, during the heating operation, before the temperature of the indoor heat exchanger is stabilized, θa and θb are set to be substantially the same, while the indoor heat exchanger is set to be substantially the same. After the temperature of the exchanger is stabilized, θa is changed to θ
Since the temperature is set to be 5 degrees or more than b, the indoor temperature can be smoothly raised to a desired temperature.

The wind direction control method according to claim 5 is
During the dehumidifying operation, θa is set to an angle at which the blowing direction is substantially downward, and θb is set to an angle at which the blowing direction is substantially horizontal, so that the room can be uniformly dehumidified without giving the resident a sense of airflow. .

[Brief description of the drawings]

FIG. 1 is a perspective view showing an indoor unit of an air conditioner according to a wind direction control method of the present invention.

FIG. 2 is a sectional view of the air conditioner shown in FIG. 1 taken along the line II-II.

FIG. 3 is a schematic diagram illustrating an arrangement of left and right wind direction blades of the air conditioner according to the wind direction control method of the present invention.

FIG. 4 is a schematic view showing an angle setting of a wind improvement lower blade in a wind direction control method according to the present invention.

FIGS. 5A and 5B are schematic diagrams showing angle settings of the left and right wind direction blades and the lower wind improvement blade during heating.

FIG. 6 is a schematic diagram showing a state of a blowout flow during heating.

FIG. 7 is a schematic diagram showing a state of a blowout flow during heating.

FIG. 8 is a graph showing the relationship between the angle θb of the lower left and right wind improving lower blades and the floor surface temperature distribution area ratio during heating.

9 (a) is a temperature distribution showing the room temperature distribution when heating is performed by the conventional wind direction control method, and FIG. 9 (b) is a temperature distribution showing the room temperature distribution when heating is performed by the wind direction control method of the present invention. FIG.

FIG. 10 is a block diagram showing a control system of wind direction control in the wind direction control method of the present invention.

FIG. 11 is a flowchart illustrating an example of wind direction control when heating is performed by the wind direction control method of the present invention.

FIG. 12 is a schematic diagram showing a division of an indoor pipe temperature region.

FIGS. 13 (a), (b) and (c) are schematic diagrams showing the angle settings of the wind direction left and right blades and the wind enhancement lower blade when dehumidification is performed by the wind direction control method of the present invention.

FIG. 14 is a sectional view showing an air conditioner according to a conventional wind direction control method.

FIGS. 15A and 15B are schematic diagrams showing the angle setting of the wind direction left and right blades and the wind enhancement lower blade according to the conventional wind direction control method.

FIG. 16 is a schematic diagram showing a state of a blowing flow according to a conventional wind direction control method.

FIG. 17 is a schematic diagram showing a state of a blow-off flow according to a conventional wind direction control method.

[Explanation of symbols]

 Reference Signs List 1 front cover, 2 air inlet, 3 indoor heat exchanger, 4 blower fan, 5 rear guider, 6 stabilizer, 7 blower path, 8 air outlet, 19a central wind improving lower blade, 19b left and right wind improving lower blade, 20 wind direction left and right blades , 25 air conditioner.

Continued on the front page (72) Inventor Masaya Hayama 1006 Kazuma Kadoma, Osaka Pref. Matsushita Electric Industrial Co., Ltd. (72) Inventor Hisashi Hiratani 1006 Odakadoma Kadoma, Osaka Pref. Matsushita Electric Industrial Co., Ltd. (Reference) 3L060 AA05 CC01 DD07 EE45 3L081 AA02 AB05 FA02 FA03 FC01

Claims (5)

[Claims] An indoor heat exchanger, a blower fan, and an air outlet are rotatably supported in the indoor unit so as to be vertically rotatable,
A wind improving lower blade that changes the wind direction in the vertical direction, and a plurality of wind direction left and right blades that are rotatably supported in the vicinity of the air outlet so as to be rotatable in the left and right direction and change the wind direction in the horizontal direction. In the air conditioner divided into three directions, the angles of the plurality of wind direction left and right blades are set to positions where the outgoing wind direction is outward, and the angles of the three divided wind improvement lower blades are set to horizontal. 0 degrees,
The angle θ of the lower wind-improving lower blade at the center, with the vertical downward being 90 degrees
A wind direction control method for an air conditioner, wherein a is set to be larger than the angle θb of the left and right wind improving lower blades. 2. During heating operation, θa is set to 30 degrees or more and 8 degrees or more.
The wind direction control method according to claim 1, wherein the angle θa is set to 0 ° or less, and the θa is set to be 5 ° or more larger than the θb. 3. When the temperature of the indoor heat exchanger is in a low temperature section or a high temperature section, the θa and the θb are set to be substantially the same, while when the temperature of the indoor heat exchanger is in a medium temperature section, 3. The wind direction control method according to claim 2, wherein said θa is set at least 5 degrees larger than said θb. 4. Before the temperature of the indoor heat exchanger is stabilized, the θa and the θb are set to be substantially the same,
3. The wind direction control method according to claim 2, wherein after the temperature of the indoor heat exchanger is stabilized, the θa is set to be 5 degrees or more larger than the θb. 5. The wind direction control method according to claim 1, wherein, during the dehumidifying operation, θa is an angle at which the blowing direction is substantially downward, and θb is an angle at which the blowing direction is substantially horizontal.