JP2001280675A - Method of controlling air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To adequately control the room temperature by an on-off control of heating by a thermostat in a method of controlling an air conditioner. SOLUTION: In the method of controlling an air conditioner having a thermostat on-off function for switching on and off a compressor according to the temperature of an indoor heat exchanger in an air heating operation, so that the number of revolution of an associated indoor fan can be set for a very gentle wind, and the room temperature is controlled to maintain a set temperature of a remote controller, step ST4 proceeds to step ST5 when the compression operation is stopped by turning off the thermostat, the room temperature is detected, a table is referred according to the room temperature and the number of revolution is set for the very gentle wind (step ST6). If the room temperature is high, the number of revolution for the very gentle wind is set to a high value. If the room temperature is low, the number of revolution for the ultra-fine air flow is set to a high value. And the compressor is set off, and an indoor fan is rotated at the set number of revolution in the control of the ultra-fine air flow (step ST7).

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 controlling an indoor fan, and more particularly to a method for controlling the number of rotations of a super breeze by an indoor fan when a heating thermostat is turned off to improve indoor comfort. The present invention relates to a method of controlling an air conditioner.

[0002]

2. Description of the Related Art During a heating operation of an air conditioner, a room temperature control for maintaining the room temperature at a set temperature of a remote controller is performed. On the other hand, when the temperature of the indoor heat exchanger (heat exchange temperature) becomes lower than a predetermined value, the set temperature is reduced. Since a lower wind is blown out into the living space, the cold air prevention control is performed with the indoor fan set to the rotation speed of the ultra-fine wind (for example, 600 rpm).

For example, at the beginning of the heating operation, since the temperature of the indoor heat exchanger does not rise, the user is prevented from giving an unpleasant sensation as a super breeze. When the temperature of the indoor heat exchanger rises and the room temperature exceeds the set temperature, the operation of the compressor is turned off (thermo-off). Further, when the room temperature falls below the set temperature due to the thermo-off, the compressor is turned on (thermo-on). Thus, the comfort of the living space is maintained by the thermo-on / off control.

[0004]

However, in the control method for the air conditioner, the room temperature sensor for detecting the room temperature is close to the air intake port (the front intake port), so that the amount of air blown out is detected at the room temperature. , The actual room temperature is not detected, and the room temperature control is not properly performed.

[0005] In particular, when the compressor is turned off or the compressor is turned on or turned off after the room temperature reaches the set temperature once after the heating operation is started, if the compressor is on, the room is turned on. Since the fan rotates at the set air volume, the detection of room temperature is accurate, but when the compressor is turned off, if the blow-off air volume becomes extremely breeze, the room temperature can be detected by the heat of the heat exchanger while the compressor is on. It has an effect.

This is because, as shown in FIG. 4, when the amount of air blown out is very small and the set temperature is high, the room temperature detected by the room temperature sensor is affected, and the temperature detected by the room temperature sensor becomes higher than the actual value (room temperature). . As shown in FIG. 5, the higher the temperature of the indoor heat exchanger when the compressor is turned on, that is, the higher the set temperature and the higher the heating operation, the higher the temperature between the detected temperature and the actual room temperature. The difference (the difference between the dashed line and the solid line in FIG. 4) tends to increase.

As described above, at the time of the thermo-on / off control of the heating operation, the detection of the room temperature is affected, so that the temperature of the living space does not become as set. For example, the room temperature by the room temperature control becomes lower than the set temperature, and the range of the room temperature fluctuation becomes large, which eventually impairs the comfort.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above problems, and has as its object to accurately detect a room temperature during a thermo-on / off control in a heating operation to appropriately perform a room temperature control, to prevent cold air, It is an object of the present invention to provide an air conditioner control method capable of improving the comfort of a vehicle.

[0009]

In order to achieve the above object, the present invention has a thermo-on / off function for turning on / off a compressor at least in accordance with a room temperature during a heating operation. In the control method of the air conditioner, which controls the room temperature to maintain the room temperature at the set temperature of the remote controller while allowing the super breeze to be enabled, the number of rotations of the super breeze when the thermo-off compressor is stopped is switched, and at least the room temperature is controlled. It is characterized in that the higher the value, the higher the number of rotations of the ultra-breeze.

The present invention has a thermo-on / off function for turning the compressor on and off in accordance with the room temperature at least during a heating operation, and enables the number of revolutions of the indoor fan to be extremely small, while the room temperature is set to a set temperature of a remote controller. In the control method of an air conditioner that performs room temperature control to maintain the temperature, a table is set in advance so that the number of revolutions of the ultra-breeze when the compressor operation of the thermo-off is stopped varies according to the room temperature. When the compressor is turned off, the table is set such that the higher the room temperature is, the higher the number of revolutions of the super breeze is set by the table. Accordingly, if the table is used as the internal memory of the microcomputer of the indoor unit control means, it can be realized without adding hardware and without increasing hardware costs.

It is preferable that the heat exchange temperature of the indoor heat exchanger is used instead of the room temperature, and that the higher the heat exchange temperature, the higher the rotation speed of the ultra-breeze. The heat exchange temperature of the indoor heat exchanger has a correlation with the room temperature, that is, is reflected in the room temperature, so that the control of the present invention can be realized and the comfort at the room temperature can be improved.

It is preferable that the set temperature of the remote controller is used instead of the room temperature, and that the higher the set temperature is, the higher the rotation speed of the ultra-breeze is. The set temperature of the remote controller is, like the heat exchange temperature of the indoor heat exchanger, correlated with the room temperature, that is, reflected on the room temperature, so that the control of the present invention can be realized and the comfort of the room temperature can be improved. .

[0013]

FIG. 1 is a block diagram showing an embodiment of the present invention.
This will be described in detail with reference to FIG. In FIG.
An indoor unit control device 1 to which the control method of the air conditioner is applied includes a room temperature control unit that issues a control instruction necessary for the room temperature control based on the content of the driving operation from the remote controller 2 and the room temperature detected by the room temperature sensor 3. 4 and
Based on the room temperature at the time of the heating thermo-off, the fan rotation speed judging unit 6 which sets the rotation speed of the super breeze from the table (internal memory) 6a of Table 1 below, and the set air volume in the room temperature control including the set rotation speed Therefore, a fan control unit 8 for controlling and driving a fan (indoor fan motor) 7 is provided.

[0014]

[Table 1]

The above Table 1 is determined in advance based on the graph of FIG. 3 and is converted into a table 6a. If the room temperature at the time of thermo-off is high, the number of rotations to be the ultra-breeze is set to a high value. Is set to, for example, 1000 rpm at the maximum,
Increase the amount of air blown out by the super breeze. If the room temperature at the time of thermo-off is low, the number of revolutions for the ultra-breeze is set to a low value, for example, the minimum is set to 600 rpm which is the same as the conventional one, and the amount of air blown by the ultra-breeze is reduced.

The room temperature control unit 4, the fan rotation speed judging unit 6 and the fan control unit 8 are microcomputers of the indoor unit control means, and are provided between the indoor unit control unit 1 and the outdoor unit control unit 9. Then, the operation according to the setting operation of the remote controller 2 is performed, and signals necessary for the room temperature control are transmitted and received. Further, the fan control unit 8 controls the fan 7
Is also included. Further, the indoor unit and the outdoor unit are provided with a refrigeration cycle portion and the like necessary for controlling the room temperature.

Next, a control method of the air conditioner having the above configuration will be described with reference to a flowchart of FIG. First, when the heating operation is performed by the remote controller 2, the indoor unit controller 1 transmits the operation content of the remote controller 2 to the outdoor unit controller 9, and according to the difference between the room temperature detected by the room temperature sensor 3 and the set temperature. The operating frequency for driving the compressor is transmitted. Thereby, in the air conditioner, the room temperature is controlled, the indoor environment is brought close to the set value of the remote controller 2, and the room temperature is maintained at the set temperature. The description of the room temperature control is omitted if it is already known.

At this time, the indoor unit controller 1 determines whether or not a thermo-on condition for turning on the compressor is satisfied (step ST1). If the heat exchange temperature detected by the heat exchange sensor 5 (the temperature of the indoor heat exchanger) does not exceed at least a predetermined value, and if the room temperature is maintained, since the thermo-on condition is not satisfied, the process proceeds from step ST1 to ST2 and the compressor Is kept off, and the number of rotations of the ultra-small wind of the fan 7 of the indoor unit is set to 600 rpm which is the same as the conventional one.

Therefore, when the control of the fan 7 becomes a super breeze, the amount of air blown out at a rotation speed of 600 rpm is obtained. That is, since the room temperature is almost the set temperature, and the heat exchange temperature detected by the heat exchange sensor 5 does not become lower than at least a predetermined value, the user does not feel cold air. Further, even if the amount of air intake is small, the room temperature is close to the heat exchange temperature and does not affect the detection of the room temperature.

However, when the heat exchange temperature detected by the heat exchange sensor 5 becomes lower than a predetermined value, the room temperature becomes lower than the set temperature and the room temperature cannot be maintained. Then, the process proceeds from step ST1 to step ST3, in which a command to turn on the compressor (including the operating frequency) is transmitted to the outdoor unit control device 9, and the compressor is turned on, and the fan 7 is set to the set airflow (exceeding the cold air prevention). (Including a breeze) to improve the indoor environment, including the prevention of cold air.

Subsequently, it is determined whether a thermo-off condition for turning off the compressor is satisfied (step ST4). If the heat exchange temperature detected by the heat exchange sensor 5 (the temperature of the indoor heat exchanger) is at least higher than a predetermined value and the room temperature exceeds the set temperature, the condition is the thermo-off condition.
The process proceeds from T4 to ST5, in which the room temperature is detected by the room temperature sensor 3, and based on the detected room temperature, the number of rotations of the super breeze is set from Table 1 (step ST6).

As shown in Table 1, as the room temperature increases,
The setting value of the rotation speed of the super breeze is large, and conversely,
The setting value of the number of revolutions of the super breeze becomes smaller. And the compressor 2
Is transmitted to the outdoor unit control device, and the number of rotations of the ultra-breeze of the indoor fan 7 is determined to the set value (step ST7).

For example, since the set temperature is raised,
When the room temperature is high, the number of revolutions of the super-breeze of the fan 7 becomes a high value, and the air intake amount increases. Therefore, the influence of the heat exchange temperature while the compressor is on on the detection of the room temperature by the room temperature sensor 3 is reduced, and the temperature of the heat exchanger decreases when the compressor is off, and at least the detected room temperature becomes lower than the conventional one (actual room temperature). ).

As described above, since the room temperature can be accurately detected, the room temperature control is made appropriate to reduce the fluctuation of the room temperature and does not impair the indoor comfort. Also, since the room temperature is high, even if the amount of air intake increases,
It does not give a cold feeling to the user.

In addition, when the room temperature is low because the set temperature is not so high, the number of rotations of the fan breeze of the fan 7 becomes a low value, and the air intake amount decreases.
Therefore, the influence of the heat exchange temperature while the compressor is on on the room temperature detection of the room temperature sensor 3 is also small, and the temperature of the heat exchanger when the compressor is off is lower, and the cold air is supplied to the user etc. as in the conventional case. It does not give a feeling.

Subsequently, it is determined whether or not a thermo-on condition for turning on the compressor is determined (step ST8). If the thermo-on condition is satisfied, the process returns to step ST2, and the above-described steps are repeated. Therefore, the heating thermoon,
At the time of the off control, the number of revolutions of the super breeze is set to a different value according to the height of the room temperature when the compressor is off, so not only the prevention of cold air, but also the detection of the room temperature becomes accurate, and the room temperature control Can be maintained as appropriate.

In the above-described embodiment, the rotation speed of the ultra-breeze is switched based on the room temperature. However, the heat exchange temperature of the indoor heat exchanger and the set temperature of the remote controller 2 may be used. The same effects as those of the above embodiment can be obtained. In this case, when the heat exchange temperature is used, as in Table 1, the higher the heat exchange temperature, the higher the rotation speed of the ultra-breeze, and the lower the heat exchange temperature, the lower the rotation speed of the ultra-breeze, in a table format. And stored in the internal memory.

For example, when the routine shown in FIG. 1 is applied, in step ST5, the heat exchange temperature is detected by the heat exchange temperature sensor 5, and the rotational speed of the ultra-breeze is set based on the detected heat exchange temperature. Good. That is, the heat exchange temperature of the indoor heat exchanger has a correlation with the room temperature, that is, is reflected in the room temperature.

When the set temperature of the remote controller 2 is used, as in Table 1, the higher the set temperature, the higher the rotation speed of the ultra-breeze, and the lower the set temperature, the lower the rotation speed of the super-breeze. It is stored in the internal memory as a lowered table format.

For example, when the routine shown in FIG. 1 is applied, the set temperature is confirmed in step ST5,
The rotation speed of the ultra-breeze may be set based on the set temperature thus confirmed. That is, the set temperature of the remote controller 2 is ideally the same as the room temperature, that is, it is reflected on the room temperature.

[0031]

According to the present invention described above, the following effects can be obtained. The present invention has a thermo-on / off function of turning on / off the compressor according to the temperature of the indoor heat exchanger during the heating operation, enabling the indoor fan to rotate at a very low speed, while setting the room temperature to the set temperature of the remote controller. In the control method of the air conditioner for controlling the room temperature to be maintained, the number of rotations of the super breeze when the compressor operation of the thermo-off is stopped is switched, and the higher the room temperature, the higher the number of rotations of the super breeze. Since the suction amount increases, the influence of the heat exchange temperature while the compressor is on on the detection of the room temperature by the room temperature sensor 3 decreases. In other words, the room temperature can be accurately detected at the time of the thermo-on / off control in the heating operation, so that the room space can be set to an appropriate temperature and the living space can be set to the set temperature, thereby improving the indoor comfort. It is effective. If the room temperature is not high, the rotation speed of the ultra-breeze becomes low (for example, the same value as the conventional one), so that the cool air can be prevented as in the conventional case, and the influence on the room temperature detection is small. , Indoor comfort can be achieved.

[Brief description of the drawings]

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

FIG. 2 is a schematic block diagram for explaining an indoor unit control device to which the control method of the air conditioner of the present invention is applied.

FIG. 3 is a schematic graph for obtaining the number of rotations of a super breeze used in the control method of the air conditioner of the present invention.

FIG. 4 is a schematic time chart for explaining a conventional method for controlling an air conditioner.

FIG. 5 is a schematic graph for explaining a conventional method for controlling an air conditioner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Indoor unit control device 2 Remote controller 3 Room temperature sensor 4 Room temperature control (microcomputer) 5 Heat exchange sensor (temperature sensor of indoor heat exchanger) 6 Fan rotation speed judgment part (microcomputer) 6a Table (microcomputer internal memory) 7 Fan (fan motor of indoor unit) 8 Fan control unit (microcomputer, drive circuit)

Claims (4)

[Claims] 1. A thermo-on / off function for turning on / off a compressor at least in accordance with a room temperature during a heating operation so that the number of revolutions of the indoor fan can be made extremely small while maintaining the room temperature at a set temperature of a remote controller. In the control method of an air conditioner that performs room temperature control, the number of rotations of the ultra-breeze when the compressor operation of the thermo-off is stopped is switched, and at least the higher the room temperature, the higher the number of rotations of the ultra-breeze becomes. Characteristic air conditioner control method. 2. A thermo-on / off function for turning on / off the compressor at least in accordance with the room temperature during a heating operation so that the number of rotations of the indoor fan can be extremely small, while the room temperature is maintained at a set temperature of a remote controller. In the method of controlling an air conditioner that performs room temperature control, a table in which the number of revolutions of the ultra-breeze when the compressor operation of the thermo-off is stopped differs according to the room temperature is obtained in advance, and the compression is performed by the thermo-off. The method for controlling an air conditioner, wherein when the air conditioner is turned off, the rotation speed of the super breeze is set to a higher value by the table at least as the room temperature is higher. 3. The method according to claim 1, wherein the heat exchange temperature of the indoor heat exchanger is used instead of the room temperature, and at least the higher the heat exchange temperature, the higher the rotation speed of the ultra-breeze.
The method for controlling an air conditioner according to item 1. 4. The air conditioner according to claim 1, wherein a set temperature of the remote controller is used in place of the room temperature, and at least the higher the set temperature, the higher the rotation speed of the ultra-breeze. Control method.