JPH08261549A - Air conditioner - Google Patents

Abstract

PURPOSE: To agitate a room air to make a room temperature distribution uniform by periodically blowing an intense air flow in an upper portion of a room when a wind velocity of a conditioned air blown into the room by an indoor machine is not set to a maximum wind velocity. CONSTITUTION: A wall-mounting indoor machine 50, which is connected to an outdoor machine to constitute an air conditioner, performs air conditioning of an interior of a room 60 such that an air taken into the machine from the room 60 by driving a blower 1 housed in the machine is made to perform heat exchange with a predetermined refrigerant, which flows in an interior of an indoor heat exchanger 3, to be returned to the interior of the room 60. A control device 40 receives a control signal transmitted by a remote controller 30 to control a rotation frequency of the blower 1 and an installation angle of vanes 7 in a vertical direction. In this case, the rotation frequency of the blower is set to a value other than a maximum value, and when set in an automatic swing mode, the blower 1 is rotated faster than the set rotation frequency with an outlet 5 directed upward and is rotated slower than the set rotation frequency with an outlet 5 directed downward.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner, and more particularly to a technique for blowing heated or cooled conditioned air into a room by exchanging heat with a refrigerant through an indoor heat exchanger in an indoor unit. It relates to an air conditioner that has been devised.

[0002]

2. Description of the Related Art For example, Japanese Patent Laid-Open No. 5-39943 discloses a control device for an air conditioner equipped with a blowing direction changing means based on the degree of air pollution. However, the setting of the wind speed in the conventional air conditioner is generally simple such as "steep", "strong", and "weak", and the actual wind speed is also controlled by this set wind speed.

[0003]

Therefore, the conventional air conditioner having the above structure has the following drawbacks. (1) During heating operation, when the conditioned air is blown upward and the set wind speed is set to "weak", hot air is trapped on the ceiling side and it is difficult to warm the entire room. (2) If the conditioned air is swung up and down in (1) above, the conditioned air may blow out downward, so the air conditioning is better than in (1), but the set wind speed is "weak". Therefore, the arrival of warm air is limited to the vicinity of the outlet. (3) When the set wind speed is “low” during the cooling operation, the arrival of the cool air is limited to the vicinity of the blowout port as in the case of (2), so that the room temperature varies. (4) When the set wind speed is used at the highest speed, "Sudden",
Although the temperature distribution in the entire room is improved, the paper on the desk flies and the conditioned air blown out from the indoor unit directly hits the body (especially the face and head), which causes discomfort. (5) If the wind speed is changed frequently, a relay sound for switching the winding of the blower fan motor sounds, which is offensive to the ears.

[0004]

As a concrete means for solving the above-mentioned problems of the prior art, the present invention has a wind speed setting means for setting the number of rotations of a blower fan of an indoor unit and blows air from the indoor unit. In an air conditioner with a mouth that can be changed vertically,

During operation, when the rotation speed of the blower fan is set to a value other than the maximum value by the wind speed setting means, and the automatic swing mode in which the air outlet is automatically switched from downward to upward or upward to downward is selected, A rotation speed adjusting means for rotating the blower fan faster than the set number of revolutions when the blow-out port faces upward, and rotating the blower fan at the set number of revolutions or slower than the set number of revolutions when the blow-out port faces downward An air conditioner having a configuration of 1;

The rotation speed of the blower fan is set to a value other than the maximum value by the wind speed setting means, and the blower fan is rotated faster than the set rotation speed for a predetermined time every predetermined time during the operation in which the air outlet is directed upward. An air conditioner having a second configuration, which is provided with rotation speed adjusting means

During operation and when the automatic swing mode in which the rotation speed of the blower fan is set to a value other than the maximum value by the wind speed setting means and the air outlet is automatically switched from downward to upward or upward to downward During the operation except when the operation is performed with the air outlet facing upward, the air direction forced change means that changes the air outlet upward every predetermined time for the predetermined time, and the rotation that rotates the blower fan faster than the set rotation speed only during this time An air conditioner of a third configuration provided with a number control means,

Further, in the air conditioner of the first or third configuration, the rotation speed control means has a function of continuously changing the rotation speed of the blower fan in accordance with the change of the direction of the air outlet. The air conditioner having the fourth configuration described above is provided to solve the above-described problems of the related art.

[0009]

[Function] When the wind speed of the conditioned air blown from the indoor unit to the room is not set to the maximum wind speed, a strong wind periodically blows above the room, so that the room air is agitated and the temperature distribution in the room is almost uniform. Be converted.

Further, in the operation of the automatic swing mode in which the opening direction of the conditioned air outlet is automatically switched up and down, the rotational speed of the blower fan decreases when the conditioned air outlet faces downward, so The strong wind does not directly hit the and the like, and there is no inconvenience such as blowing off documents.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. Reference numeral 50 denotes a wall-mounted indoor unit that constitutes an air conditioner of the present invention by connecting to an outdoor unit (not shown), and drives the built-in blower fan 1 to heat the air taken in from the room 60 into the room. The heat is exchanged with a required refrigerant flowing inside the vessel 3 to return it to the room 60 to air-condition the room 60. The conditioned air outlet 5 exchanges heat with the indoor heat exchanger 3 to heat or A plurality of blades 7 are provided so that the installation angle with respect to the vertical direction can be adjusted so that the cooled conditioned air can be blown into the room 60 at a desired angle. Further, a filter 11 is provided at the indoor air intake port 9.

A reference numeral 30 designates a wind speed setting button 31 for setting the wind speed of the conditioned air blown out from the air outlet 5 to, for example, either "strong" or "weak", and an installation angle of the blades 7 to indicate a desired wind direction. A wind direction setting button 32 for obtaining a wind direction is provided together with an operation start button, an operation stop button, a room temperature setting button, etc., which are not shown, and outputs a required control signal to the indoor unit 50 by infrared rays (hereinafter referred to as a remote controller). It says).

Reference numeral 40 denotes a control device including a microcomputer having required functions such as storage, calculation, comparison, and timekeeping functions. The control device 40 is built in the indoor unit 50, and the remote controller 30 transmits it via infrared rays or the like. Upon receiving the control signal, the operation start / stop signal is output to an outdoor unit (not shown), and the circulation amount of the refrigerant is determined based on the temperature signal detected and output by the temperature sensor 13 provided in the air intake 9. As a basic performance, it has a function to output control signals to the outdoor unit.

Further, the control device 40 is constructed so as to be able to control the rotation speed of the blower fan 1 and the installation angle of the blades 7 in the vertical direction by receiving a control signal transmitted from the remote controller 30. Reference numeral 15 is an inverter for converting the frequency of the electric power supplied to the motor 17 that drives the blower fan 1 to control the rotation speed of the blower fan 1.

The control device 40 is specifically the remote controller 30.
When the operation start signal is input from, the required control signal is output to the outdoor unit to start the operation of the outdoor unit,
Based on the temperature signal output from the temperature sensor 13 and the like, a control signal for controlling the circulation amount of the refrigerant is output to the outdoor unit, and

The electric power supplied to the motor 17 is controlled so that the blower fan 1 rotates at the maximum rotation speed until a predetermined time elapses from the start of operation or the temperature detected by the temperature sensor 13 reaches a predetermined temperature. The frequency is converted by the inverter 15 into, for example, 50 Hz.

Further, the controller 40 controls the frequency of the power supplied to the motor 17 when the "strong wind" is instructed by the wind speed setting button 31 of the remote controller 30.
5 is converted to, for example, 30 Hz, and when "weak wind" is instructed, it is converted to, for example, 10 Hz to control the rotation speed of the blower fan 1.

Further, the control device 40 controls the rotation speed of the blower fan 1 and the installation angle of the blades 7 according to the flowchart illustrated in FIG. 2 when the normal cooling or heating operation is instructed by the remote controller 30. Configured.

That is, in step S1, it is determined whether or not the current set wind speed is the maximum wind speed, specifically, in this case, whether or not the motor 17 is driven by the electric power of the frequency 50 Hz, and it is judged as YES. When the motor 17 is operated, the control returns to the main control, and the motor 17 has a frequency of 10 Hz or
When the drive is driven by the electric power of 0 Hz and it is determined to be no, the process proceeds to step S2.

At step S2, the conditioned air outlet 5 set by the wind direction setting button 32 of the remote controller 30.
The opening direction of the blade, that is, the direction of the blade 7 that controls the wind direction, and when the automatic swing mode in which the conditioned air outlet 5 is automatically switched in the vertical direction is set, the process proceeds to step S3, and the conditioned air When the blow-out port 5 of is set to face the uppermost, step 1
1, and in other cases, the process proceeds to step S21.

In step S3, when it is determined that the operation is in the automatic swing mode, the current opening direction of the conditioned air outlet 5 is changed by an appropriate means such as a potentiometer (not shown) attached to the blade 7. To detect.

In step S4, the relationship between the opening direction of the conditioned air outlet 5 and the wind direction coefficient D1 which is stored in advance in a memory section (not shown) of the control device 40 and is set as shown in FIG. The wind direction coefficient D1 corresponding to the opening direction of the conditioned air outlet 5 detected in step S3 is calculated.

In step S5, the value of the wind direction coefficient D1 obtained in step S4 is set to the wind speed setting button 3 of the remote controller 30.
Frequency 30 corresponding to "strong wind" and "weak wind" set in 1.
The frequency Hf of the electric power supplied to the motor 17 is obtained by multiplying by Hz or 10 Hz.

In step S6, the frequency of the electric power is converted by the inverter 15 into the frequency Hf of the electric power obtained in step S5, and the rotation speed of the blower fan 1 is changed in accordance with the change in the opening direction of the conditioned air outlet 5. And then returns to the main control.

Step S1 after the determination is made that the opening direction of the conditioned air outlet 5 is set to the uppermost side
In step 1, time counting is started, and in step S12, a predetermined time t1
When it is determined that (for example, 5 minutes) has passed, the process proceeds to step S13, where the frequency Hf of the electric power supplied to the motor 17 is converted to the maximum value of 50 Hz by the inverter 15, and the rotation speed of the blower fan 1 is changed. Make it the best.

When it is determined in step S14 that the predetermined time t2 (for example, 5 minutes and 30 seconds) started in step S11 has elapsed, the process proceeds to step S15 to set the frequency Hf of the electric power supplied to the motor 17. The original frequency, that is, the frequency before conversion in step S13, specifically 10 Hz or 30 Hz, is converted back by the inverter 15 and the rotation speed of the blower fan 1 is changed to the remote controller 3.
The predetermined speed set by the wind speed setting button 31 of 0 is returned to the main control.

In step S21, when it is determined that the conditioned air outlet 5 is facing the other direction, the process proceeds to step S21.
The time measurement is started, the process proceeds to step S22, and the predetermined time t3 is reached.
When it is determined that (for example, 5 minutes) has elapsed, the process proceeds to step S23, and the conditioned air outlet 5 is directed to the uppermost side, for example, at a predetermined angular velocity (for example, 10 ° / sec). Specifically, a control signal is output to a drive motor (not shown) that controls the installation angle of the blade 7 so that the blade 7 is most upward with a constant angular velocity.

In step S24, the current opening direction of the conditioned air outlet 5 is detected, and in step S25, it is determined whether or not this opening direction is the uppermost direction.

When it is determined NO in step S25, the process proceeds to step S26, and the total amount of change in the opening direction of the conditioned air outlet 5 detected in step S24 from the start of the change is set to, for example, other in step S2. The difference is calculated as a percentage with the angular difference between the opening direction of the conditioned air outlet 5 and the uppermost portion at the time of the determination as 100.

In step S27, it is stored in advance in a memory unit (not shown) of the control device 40, for example, as shown in FIG.
The wind direction coefficient D2 corresponding to the opening direction of the conditioned air outlet 5 detected in step S24 is calculated from the relationship between the amount of change in the opening direction of the conditioned air outlet 5 and the wind direction coefficient D2 set as described above. Ask.

Subsequently, the sequence proceeds to steps S28 and S29 for performing the same control operation as steps S5 and S6,
As the opening direction of the conditioned air outlet 5 faces upward,
The frequency Hf of the electric power supplied to the motor 17 is increased to increase the rotation speed of the blower fan 1.

When it is determined in step S25 that the answer is YES, that is, the opening direction of the conditioned air outlet 5 is the uppermost direction, the process proceeds to step S30, and the time measured at step S21 is the predetermined time t4 (for example, t4). 5,
If it is determined that 40 minutes have passed, the process proceeds to step S31, and the opening direction of the conditioned air outlet 5 is set to the original state, for example, at a predetermined angular velocity (for example, 10 ° / second), that is, step S23. A control signal for returning to the state before the change instruction is output to the drive motor (not shown).

Further, the steps S24, S25, S
Steps S32, S33, S34, S35, S36, S for performing the same control operation as 26, S27, S28, S29.
37, the frequency Hf of the electric power supplied to the motor 17 is lowered and the rotational speed of the blower fan 1 is returned to the original as the opening direction of the conditioned air outlet 5 is returned to the original direction, that is, toward the lower side. .

Note that FIG. 3C shows the relationship between the amount of change in the opening direction of the conditioned air outlet 5 and the wind direction coefficient D3 when the opening direction of the conditioned air outlet 5 is restored in step S31. This relationship is also stored in advance in a memory unit (not shown).

When it is determined in step S33 that the opening direction of the conditioned air outlet 5 has returned to the original direction, the process returns to the main control.

As described above, since the rotation speed of the blower fan 1 and the opening direction of the conditioned air outlet 5 are controlled by the control device 40, a strong wind is regularly sent to the upper part of the room 60 so that the room 60 can be operated. The air of 60 is agitated, and the temperature distribution in the room 60 is made substantially uniform.

On the other hand, in the operation in the automatic swing mode in which the opening direction of the conditioned air outlet 5 is automatically switched to the vertical direction, when the conditioned air outlet 5 faces downward, the rotation speed of the blower fan 1 decreases. Therefore, the strong wind does not directly hit the face or the like to cause discomfort, and the inconvenience of blowing away documents or the like does not occur.

Since the present invention is not limited to the above embodiments, various modifications can be made without departing from the spirit of the claims.

For example, the operation of changing / returning the opening direction of the conditioned air outlet 5 in steps S23 and S31 may be performed for a predetermined time (for example, 5 seconds).

Further, the predetermined time t in step S30
Instead of the determination of whether the passage / non-elapse of 4 has been performed, the time measuring means that operates after it is determined in step S25 that the opening direction of the conditioned air outlet 5 is directed to the uppermost side is for a predetermined time (for example, 30 seconds). Confirm progress, step S31
Can also be configured to transition to.

A thyristor may be used instead of the inverter 15 so that the rotation of the blower fan 1 can be continuously changed.

Further, the indoor unit 50 may be of a type mounted on the ceiling. In this case, even if the conditioned air outlet 5 is directed to the uppermost side,
At best, the angle should be about 10 degrees upward, but the angle may be considered relative.

[0043]

As described above, according to the air conditioner of the present invention, when the wind speed of the conditioned air blown from the indoor unit into the room is not set to the maximum wind speed, a strong wind is periodically generated above the room. Since the air is blown out into the room, the room air is agitated and the temperature distribution in the room is made substantially uniform.

Further, in the operation of the automatic swing mode in which the opening direction of the conditioned air outlet is automatically switched up and down, the rotation speed of the blower fan decreases when the conditioned air outlet faces downward, so There is no significant discomfort due to strong wind hitting the above, and no inconvenience such as blowing off documents etc. is produced.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a main part (indoor unit) of an air conditioner.

FIG. 2 is an explanatory diagram showing an example of a control method.

FIG. 3 is an explanatory diagram showing how to obtain a wind direction coefficient.

[Explanation of symbols]

 1 Blower Fan 3 Outdoor Heat Exchanger 5 Air Outlet 7 Blade 9 Air Intake Port 11 Filter 13 Temperature Sensor 15 Inverter 17 Motor 30 Driving Controller (Remote Control) 31 Wind Speed Setting Button 32 Wind Direction Setting Button 40 Control Unit 50 Indoor Unit 60 Indoor

Claims (4)

[Claims] 1. An air conditioner equipped with an indoor unit having a blower fan, the number of rotations of which is set by a wind speed setting means, and an air blowout port whose vertical direction is changeable. The number is set to a value other than the maximum value by the wind speed setting means, and during operation in which the automatic swing mode in which the vertical direction of the air outlet is automatically switched is selected, the air outlet is directed toward the upper reversal vicinity. Sometimes, the blower fan is rotated faster than the set number of revolutions, and when the air outlet is directed to the lower reversal vicinity, rotation speed adjusting means for rotating the blower fan at the set number of revolutions or slower than the set number of revolutions is provided. And an air conditioner. 2. An air conditioner equipped with an indoor unit having a blower fan whose rotation speed is set by wind speed setting means, and an air blowout port whose vertical direction is changeable, wherein the blower fan rotates. The number is set to a value other than the maximum value by the wind speed setting means, and at the time of the operation in which the air outlet is directed to the uppermost side, a rotation speed adjusting means for rotating the blower fan at a predetermined time for a predetermined time faster than the set rotation speed is provided. An air conditioner characterized by being provided. 3. An air conditioner equipped with an indoor unit having a blower fan whose rotation speed is set by a wind speed setting means, and an air blowout port whose vertical direction is changeable. The number is set to a value other than the maximum by the wind speed setting means, and the automatic swing mode in which the vertical direction of the air outlet is automatically switched is selected during operation and when the air outlet is directed toward the top. At the time of operation excluding and, an air outlet forced change means for directing the air outlet to the uppermost for a predetermined time every predetermined time,
An air conditioner characterized by comprising rotation speed control means for rotating the blower fan faster than a set rotation speed only during this period. 4. The rotation speed control means has a function of continuously changing the rotation speed of the blower fan in accordance with a change in the direction of the air outlet. Air conditioner.