JPH05322290A - Method for controlling air conditioner - Google Patents

Abstract

PURPOSE:To improve a heating effect during a heating operation of an air conditioner. CONSTITUTION:In a method for controlling an air conditioner in which at least an automatic setting of air volume for controlling the number of revolutions of an indoor fan can be performed in response to a difference between a detected temperature detected by a room temperature sensor 1 and a set temperature, a timer 4 is started at the beginning of heating operation of the air conditioner. In the case that a detected temperature (a room temperature) at the beginning of heating operation is low, the air volume is corrected to be strong with the indoor fan 3 and then a forced air blowing operation is carried out until a time-up state of the timer 4. The number of revolutions of the indoor fan 3 is controlled in response to a difference between the present detected temperature and the set temperature and when the timer 4 shows a timed-up condition, the operation of the indoor fan 3 is returned to its normal state.

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 for maintaining a comfortable living environment, and more specifically, correcting the amount of air blown by an indoor fan according to the room temperature (room temperature) at the start of heating operation. However, the present invention relates to an air conditioner control method for improving the heating effect.

[0002]

2. Description of the Related Art Conventionally, in heating operation of this type of air conditioner (for example, when "automatic air volume" is set), in order to enhance the heating effect, the heating capacity is increased and the indoor air flow rate is increased. So that the air in the room circulates rapidly,
After that, the amount of air blown indoors was gradually reduced, the operating noise was reduced, and the operation was quiet.

More specifically, the number of rotations of the indoor fan is controlled according to the difference between the temperature (room temperature) detected by the room temperature sensor provided in the indoor unit and the temperature set by a remote controller, etc. As the difference becomes smaller, the number of revolutions is reduced and the operating noise is reduced, and the temperature difference disappears.
Alternatively, when the room temperature exceeds the set temperature, the indoor fan is stopped.

By the way, as shown in FIG. 5, for example, since warmed air is light (because the specific gravity of warm air is small), the air easily rises, and the temperature near the ceiling is inevitably lower than that near the floor. When the air conditioner is a wall-mounted type, the room temperature sensor 1 may be built in the indoor unit 2, so that the hot air is blown downward during the heating operation, and as described above. It is designed to increase the heating capacity and increase the amount of air blown indoors to minimize the temperature difference between the ceiling and the floor.

On the other hand, when the operation is performed with a large amount of air blown on the indoor side, the operating noise is large. Therefore, when the difference between the room temperature and the set temperature becomes small, the air flow is reduced and the room temperature exceeds the set temperature. At times, the rotation of the indoor fan is stopped, and measures are taken to suppress operating noise.

[0006]

However, in the control method of the air conditioner, since the strength of the air volume generated by the indoor fan is predetermined, for example, when the room temperature at the start of the heating operation is low, the floor is low. Before the area warms up,
The rising air raises the temperature in the vicinity of the ceiling, which reduces the difference between the room temperature and the set temperature, so it is determined that the room has been warmed and the air flow is reduced, but during the silent operation, the temperature around the ceiling is reduced. The temperature and the temperature near the floor surface remain high, the feet do not warm up easily, and the heating effect is low.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide an air conditioner capable of heating the feet sufficiently during heating operation and improving the heating effect. It is to provide a control method.

[0008]

In order to achieve the above object, the present invention makes it possible to set an automatic air volume for controlling at least the rotation speed of an indoor fan in accordance with the difference between the temperature detected by a room temperature sensor and a set temperature. In the control method of the air conditioner, there is a timer unit that measures a predetermined time from the start of heating operation of the air conditioner, and the lower the indoor temperature detected at the start of the heating operation, the stronger the air volume becomes. Corrected, the higher the detected indoor temperature, the weaker the air volume is corrected, the air volume by the indoor fan is returned to normal after a predetermined time has elapsed from the start of the heating operation, and the corrected air volume operation and normal The gist is that the rotation speed of the indoor fan is changed according to the difference between the detected temperature and the set temperature during the air volume operation to enable silent operation.

[0009]

With the above method, when the room temperature at the start of the heating operation of the air conditioner is low, the operation of increasing the air volume by the indoor fan is performed, that is, the rotation speed of the indoor fan is increased. The rotation speed of the indoor fan is changed according to the difference between the room temperature and the set temperature.

Since the rotation speed of the indoor fan is high, the room can be warmed quickly and the floor area can be easily heated, and the difference between the room temperature and the set temperature can be reduced. Even if the temperature becomes low, the same number of revolutions is higher than usual, so it is possible to sufficiently warm the feet.

After a lapse of a predetermined time from the start of the heating operation, the operation is returned to the normal operation of the air volume by the indoor fan. However, since the inside of the room, especially the feet is already sufficiently warmed, The feeling of heating will not be insufficient, and the heating effect will be improved.

[0012]

EXAMPLE A method for controlling an air conditioner according to the present invention is operated by changing the strength of air flow according to the room temperature at the start of heating operation.
For example, when the room temperature is as low as less than 5 ° C, the floor temperature is also low,
Since it is hard to heat the feet, the air flow rate is corrected strongly and the operation is performed, and after a lapse of a predetermined time from the start of the heating operation, the air flow rate is operated as usual, and the room temperature (Tr) is set by the "automatic air flow" setting. The number of rotations of the indoor fan is changed according to the difference with the set temperature (Ts) by the remote control to suppress the operating noise,
I try to keep my feet warm enough even when driving quietly.

Therefore, as shown in FIG. 2, the indoor unit 2 of the air conditioner according to the present invention stores the air obtained by the room temperature sensor 1 for detecting the indoor temperature and the indoor heat exchanger constituting the refrigeration cycle. Indoor fan 3 for blowing indoors
And a timer (built-in type) 4 for measuring the time (for example, 2 hours) from the start of the heating operation, and at least the "automatic air volume" set by the remote controller 5 to detect the detected room temperature and the temperature set by the remote controller 5. A control device 7 that controls the rotation speed of the indoor fan 3 according to the difference, controls the indoor unit, and transmits a necessary control signal to the outdoor unit 6.
It has and.

The indoor unit 2 is equipped with an indoor heat exchanger (not shown) which constitutes the refrigeration cycle,
Further, the outdoor unit 6 is the compressor 8 that constitutes the refrigeration cycle.
, The outdoor fan 9 of the outdoor heat exchanger, and the compressor 8 and the outdoor fan 9 according to the control signal from the indoor unit 1.
And a control device 10 for controlling the above.

Next, the control method of the air conditioner having the above structure will be described in detail with reference to the flow chart of FIG. 1 and the air volume zone division diagrams of FIG. 3 and FIG. The machine is said to be in heating operation,
It is assumed that "automatic air volume" is set in this heating operation. That is, at least the rotational speed of the indoor fan 3 is controlled according to the difference between the temperature detected by the room temperature sensor 1 and the temperature set by the remote controller 5, and the smaller the temperature difference, the lower the rotational speed of the indoor fan 3, Silent driving that reduces the driving noise is possible.

At this time, in the control device 7 of the indoor unit 2, the heating operation is started by a signal from the remote controller 5, the timer 10 is reset and started (step ST1), and the room temperature sensor is operated. 1
The room temperature (Tr) is calculated on the basis of the detection signal obtained by, and the rotation speed control of the indoor fan 3, that is, the strength of the air volume is determined based on the calculated room temperature (Tr).

When the room temperature (Tr) is low, for example, lower than 5 ° C., the air volume operation is determined to be a strong air volume zone division shown in FIG. 3, and the room temperature (Tr) exceeds 5 ° C. and is not so low. At times, the air volume is determined as the normal air volume zone division shown in FIG. The room temperature (T
When r) is high, the rotation speed is determined to be lower than the air volume zone division shown in the figure (not shown).

That is, when the room temperature (Tr) is low, the temperature of the floor surface is extremely low, and even if the blowing of warm air is downward, the temperature difference between the floor surface and the vicinity of the ceiling does not easily shrink, and it is difficult to warm the feet. Because.

As shown in FIG. 3, when the difference between the room temperature (Tr) and the set temperature (Ts) is 4 ° C. or more, the rotation speed of the indoor fan 3 is 1000 rpm. From 1100r
pm. This will heat up the room faster.

Subsequently, it is judged whether or not the timer 4 has timed out (step ST3), and the operation by the air volume zone division shown in FIG. 3 continues until a predetermined time elapses from the start of the heating operation. Be done.

In this case, as the difference between the room temperature (Tr) and the set temperature (Ts) becomes smaller by setting the "automatic air volume", the rotation speed of the indoor fan 3 becomes smaller and the temperature difference becomes equal. 100 between 4 ° C and 2 ° C
0 rpm. When the temperature difference is between 2 ° C. and 0 ° C., 900 rpm. (As shown in FIG. 3). When the room temperature (Tr) exceeds the set temperature (Ts), the rotation of the indoor fan 3 is stopped, and the room temperature (Tr)
The operation is performed in accordance with the air flow rate zone classification shown in FIG.

Therefore, even if the room temperature is low at the start of the heating operation and the feet cannot be sufficiently warmed as described in the conventional example, the operation is performed with a strong air flow so that the room can be warmed faster. In particular, the feet can be warmed sufficiently, and the rotation speed of the indoor fan 3 is 900 rpm. Since it becomes relatively low, silent operation is possible.

Subsequently, when the timer 4 has timed out, the operation is switched to the normal operation according to the air flow rate zone division shown in FIG. 4, so that the rotation speed of the indoor fan 3 is controlled as usual. In this case, when the difference between the room temperature (Tr) and the set temperature (Ts) is 4 ° C. or more, the rotation speed of the indoor fan 3 is 1000 rpm. When the temperature is between 4 ° C. and 2 ° C., the rotation speed of the indoor fan 3 is 900 rpm. When the temperature difference is between 2 ° C. and 0 ° C., 800 rpm. (Step ST
4). When the room temperature (Tr) exceeds the set temperature (Ts), the rotation of the indoor fan 3 is stopped, and as the room temperature (Tr) decreases, the operation is performed by the air volume zone division shown in FIG. Be done.

Thus, when the room temperature (Tr) is low at the start of the heating operation and the difference between the temperature of the floor surface and the temperature of the vicinity of the ceiling is large, the operation of the air volume is increased to make the room faster. Warm up, especially you can warm your feet sufficiently, and after a lapse of a predetermined time from the start of the heating operation, it will be returned to normal air volume operation, enabling silent operation,
In addition, it is possible to solve the problem that the feet are not sufficiently warmed during the normal air volume operation.

In the above embodiment, the case where the room temperature at the start of the heating operation is low has been described. When the room temperature is a normal low, the air volume operation is performed according to the air volume zone division shown in FIG. When the room temperature is high, the air volume operation is performed according to the air volume zone division in which the rotation speed of the indoor fan is low. When the room temperature is high, it is not necessary to warm the room so much, so the number of rotations of the indoor fan can be set low to prevent overheating.

Further, two types of strong air flow rate zone classification shown in FIG. 3 and normal air flow rate zone classification shown in FIG. 4 have been described. However, various strong air flow rate zone classifications are provided to start the heating operation. It may be selected according to the room temperature at that time.

[0027]

As described above, according to the present invention, an air conditioner capable of setting an automatic air volume for controlling at least the rotation speed of an indoor fan according to the difference between the temperature detected by the room temperature sensor and the set temperature. In the control method of the machine,
It operates by correcting the air volume by the indoor fan according to the indoor temperature at the start of the heating operation, and operates the air volume by the indoor fan normally after a lapse of a predetermined time from the start of the heating operation, and sets the detected temperature. Since the number of rotations of the indoor fan is controlled according to the difference with the temperature, it is assumed that the room temperature is low at the beginning of the heating operation and it is difficult to warm the room. And, by extension, can warm your feet sufficiently,
In addition, silent operation is possible by setting the automatic air volume, and since the room is sufficiently warmed during the silent operation, the feeling of heating at the feet does not become insufficient, and the heating effect can be improved.

[Brief description of drawings]

FIG. 1 is a schematic flowchart illustrating the operation of a control method for an air conditioner according to the present invention.

FIG. 2 is a schematic block diagram of an air conditioner to which a control method according to an embodiment of the present invention is applied.

FIG. 3 is a strong air volume zone division diagram for explaining the operation of the control method for an air conditioner of the present invention.

FIG. 4 is a normal air volume zone division diagram for explaining the operation of the air conditioner control method of the present invention.

FIG. 5 is a diagram illustrating a heating state of the room by the air conditioner.

[Explanation of symbols]

 1 room temperature sensor 2 indoor unit (of air conditioner) 3 indoor fan 4 timer 5 remote controller 6 outdoor unit 7 control device (of indoor unit 2)

Claims (2)

[Claims] 1. A method for controlling an air conditioner capable of setting at least an automatic air flow rate for controlling a rotation speed of an indoor fan according to a difference between a temperature detected by a room temperature sensor and a set temperature, wherein the heating of the air conditioner is performed. It has a timer for measuring a predetermined time from the start of operation, corrects the air volume by the indoor fan according to the indoor temperature detected at the start of the heating operation, and uses the indoor fan after a predetermined time has elapsed from the start of the heating operation. A characteristic is that the air volume is returned to normal, and the rotation speed of the indoor fan is changed according to the difference between the detected temperature and the set temperature during the corrected air volume operation and the normal air volume operation to enable silent operation. Control method for air conditioner. 2. The air volume is corrected more strongly as the indoor temperature detected at the start of the heating operation is lower, and the air volume is slightly corrected as the detected indoor temperature is higher. Item 2. A control method for an air conditioner according to Item 1.