KR20020004466A - Airconditioner control method - Google Patents

Abstract

PURPOSE: A control method of an air conditioner in a heating mode is provided to reduce power consumption and to improve the reliability of product by controlling the driving of a compressor and a heater selectively according to indoor temperature. CONSTITUTION: A control unit decides if desired temperature is lower about specific temperature than the current indoor temperature(100). If so, the control unit outputs control signal for driving compressors and heaters to each driving unit(103). If not, the control unit decides if the desired temperature is higher than the current temperature(106). The control unit outputs signals for operating the compressors and the fist heater(109). The control unit decides the state of the second heater(112). If the heater is turned off, the control unit controls the second heater to keep the turned-off state(115). The control unit operates the compressors and heaters selectively according to the preset conditions. Thereby, the power consumption of the air conditioner is reduced.

Description

Heating condition control method of air conditioner {Airconditioner control method}

The present invention relates to a heating operation control method for an air conditioner, and more particularly, to an air conditioner for efficiently controlling the operation of a compressor and a heater according to a room temperature in an air conditioner having a plurality of compressors and heaters. It relates to a heating operation control method.

The air conditioner drives the heating cycle and the cooling cycle under control, warms the room in the cold winter by the operation of the heating cycle, and cools the room in the hot summer by the operation of the cooling cycle.

In general, as shown in FIG. 1, the air conditioner includes an indoor unit and an outdoor unit, and the indoor unit includes a condenser 200 that performs heat exchange so that warm wind is discharged to the room during the heating operation. The outdoor unit includes a compressor 210 for compressing a refrigerant to generate a gas of high temperature and high pressure, and an evaporator installed between the compressor 210 and the condenser 200 to perform another heat exchange between the outdoor air and the refrigerant ( 220). In addition, the four sides 230 for switching the cooling cycle or heating cycle, and the expansion device 240 for reducing the pressure of the refrigerant flowing into the evaporator 220 side is provided.

The circulation cycle of the air conditioner configured as described above comprises a heating cycle when the indoor heat exchanger functions as a condenser and constitutes a cooling cycle when the indoor heat exchanger functions as an evaporator.

The heating operation by the heating cycle is performed by the refrigerant flowing in the indoor heat exchanger dissipating heat to the indoor air and discharging warm wind to the indoor side. The cooling operation by the cooling cycle is performed by the refrigerant flowing in the indoor heat exchanger absorbing the heat of the indoor air and discharging the cool wind to the indoor side.

The performance of the air conditioner comprised in this way is determined according to the efficiency of a compressor. Therefore, when the operation efficiency of the compressor 210 is high, the heating operation or cooling operation efficiency of the air conditioner is increased in proportion to that, and conversely, when the operation efficiency of the compressor is low, the efficiency of the air conditioner is also low.

On the other hand, in recent years, environmental pollution is intensified with air pollution, which is very hot in summer and very cold in winter. In response to these environmental changes, consumers are sensitive and demand a high performance air conditioner. In order to satisfy these demands, the air conditioner's performance is limited by only one cooling operation and one heating operation. There was this.

In addition, the conventional air conditioner has a problem that it is difficult to variably control the operation state of the compressor in accordance with the fluctuation of the heating load because the heating operation is performed by only one compressor. That is, the air conditioner heats the room by driving the compressor only when the room temperature is lower than the user's desired temperature. Therefore, it is difficult to variably control the operating state of the compressor because only the control to turn on the compressor when the operation of the compressor is needed, and vice versa, can be performed.

In particular, even when the difference between the user's desired temperature and the room temperature is small, the heating operation is controlled only by the on / off control of the compressor. Therefore, unnecessary power consumption is generated, and the operation control range of the compressor is adjusted according to the change in the heating load. There was a difficult problem to do.

In other words, the present invention proposes a heating operation including a plurality of compressors and an operation of the compressor and the heater selectively according to the heating operation load in an air conditioner having a plurality of heaters as an auxiliary heating mechanism.

Accordingly, an object of the present invention is to provide a heating operation control method of an air conditioner for selectively controlling the operation of the compressor and the heater according to the room temperature in the air conditioner having a plurality of compressors and heaters.

It is another object of the present invention to provide an air conditioner having a plurality of compressors and heaters to optimally control the operation of a compressor and a heater according to a heating load, thereby reducing power consumption and increasing product reliability. It is to provide a heating operation control method.

1 is a conceptual diagram of a general air conditioner,

2 is a block diagram for the heating operation of the air conditioner according to the present invention,

3 is an operation flowchart for heating operation control of an air conditioner according to the present invention;

Figure 4 is a condition diagram in each operation mode at the time of heating operation control according to the present invention.

Explanation of symbols on the main parts of the drawings

1 control unit 3 signal input unit

5: room temperature detection unit 7,9: compressor driving unit

11,13: heater driving unit 15,17: compressor

19,21: heater

The heating operation control method of the air conditioner according to the present invention for achieving the above object, in the air conditioner to perform a heating operation, having at least one compressor and at least one heater: the range of the temperature difference between the room temperature and the desired temperature A first step of dividing the number into a plurality and setting operating conditions of the compressor and the heater in each range; Detecting a current room temperature; Calculating a temperature difference between the current room temperature and the desired temperature; And a fourth step of determining in which range the calculated temperature difference falls within the preset range, and controlling the operation of the compressor and the heater according to the preset operating conditions.

The first step of the present invention is characterized in that the operating conditions are set so that a plurality of compressors and heaters are sequentially controlled according to the difference between the room temperature and the desired temperature.

The first step of the present invention, when the temperature difference minus the desired temperature from the room temperature is a predetermined temperature (-α ℃) or more, it characterized in that all the compressor and all the heaters are controlled to the on state.

In the first step of the present invention, when the temperature difference minus the desired temperature from the room temperature is more than the predetermined temperature (-α ℃), less than the predetermined temperature (-β ℃), controlling all the compressors and one heater in the on state It is characterized by.

In the first step of the present invention, when the temperature difference obtained by subtracting the desired temperature from the room temperature is equal to or greater than a predetermined temperature (−β ° C.), all compressors are controlled to an on state, and the second heater is controlled to an off state. Characterized in that.

In the first step of the present invention, when the temperature difference minus the desired temperature from the room temperature is equal to or higher than 0 ° C. and lower than the predetermined temperature (γ ° C.), the first compressor is controlled to be in an on state, and the first and second heaters are in an off state. It characterized in that the control.

The compressor or the heater in which the operation is not set in the first step is characterized in that the operation state is set variable according to the current operation state.

In the first step of the present invention, when the temperature difference obtained by subtracting the desired temperature from the room temperature is greater than or equal to the predetermined temperature (γ ° C.) and less than or equal to the predetermined temperature (δ ° C.), the second compressor and all heaters are controlled to be in an off state. 1 Compressor is characterized by maintaining the current operating state.

The first step of the present invention, when the room temperature is a predetermined temperature (δ ℃) or more than the desired temperature, it is characterized in that all the compressor and all the heaters are controlled to the off state.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram for the heating operation of the air conditioner according to the present invention.

The air conditioner of the present invention is characterized by having at least one compressor and at least one heater. In the exemplary embodiment of the present invention illustrated in FIG. 2, the two compressors 15 and 17 and the two heaters 19 and 21 are described as an example. However, if necessary, the number of compressors and heaters may be increased or decreased. .

As shown in FIG. 2, the air conditioner of the present invention includes a first compressor driver 7 for driving the first compressor 15, and a second compressor driver for driving the second compressor 17 ( 9), the 1st heater drive part 11 for operating the 1st heater 19, and the 2nd heater drive part 13 for operating the 2nd heater 21 are comprised. Under the control of the driving units 7, 9, 11 and 13, the compressors 15 and 17 and the heaters 19 and 21 are independently turned on and off.

Each of the drivers 7, 9, 11, and 13 is controlled by the controller 1. The controller 1 compares the room temperature with the desired temperature, determines the heating load variation according to the difference between the two temperatures, and individually controls the operation of the compressor and the heater.

As shown in FIG. 4, the controller 1 controls the on / off operation of the compressor and the heater according to the heating load fluctuation. The first mode is set when the temperature difference obtained by subtracting the desired temperature from the room temperature is lower than the predetermined temperature (−α ° C.). The second mode is set when the temperature difference obtained by subtracting the desired temperature from the room temperature is larger than the predetermined temperature (−α ° C.) and lower than the predetermined temperature (−β ° C.). The third mode is set when the temperature difference obtained by subtracting the desired temperature from the room temperature is higher than the predetermined temperature (−β ° C.) and exists between 0 ° C. In addition, the fourth mode is set when the temperature difference obtained by subtracting the desired temperature from the room temperature is between 0 ° C. and the predetermined temperature (γ ° C.), and the fifth mode uses the predetermined temperature (γ ° C.) by subtracting the desired temperature from the room temperature. It is set larger than the predetermined temperature ([deg.] C.), and the sixth mode is set when the temperature difference obtained by subtracting the desired temperature from the room temperature is higher than the predetermined temperature ([deg.] C.).

Therefore, the control unit 1 inputs the room temperature detected by the room temperature detection unit 5 and the desired temperature set by the user by the signal input unit 3, and the compressor and the heater according to the preset mode by the two temperature differences. Control heating operation by turning on / off.

Next will be described the heating operation control process of the air conditioner according to the present invention having the above configuration.

3 is an operation flowchart for heating operation control of the air conditioner according to the present invention.

When the heating operation start signal is input from the user through the signal input unit 3, the control unit 1 controls the heating operation based on the flowchart shown in FIG. When the heating operation is started, the control unit 1 recognizes the desired temperature set by the user in order to determine the heating load condition of the current state. And the indoor temperature detected by the indoor temperature detection part 5 is read.

By the operation, the controller 1 recognizes the desired temperature and the current indoor temperature, and determines whether the desired temperature set by the user is higher than the current indoor temperature by a predetermined temperature (α ° C.) or more (step 100).

When the condition of the 100th step is satisfied, the controller 1 controls both the first and second compressors 15 and 17 and the first and second heaters 19 and 21 according to the operating conditions set on the first mode. A control signal for driving is outputted to each of the driving units 7, 9, 11, and 13 (step 103). The first and second compressors 15 and 17 and the first and second heaters 19 and 21 are operated by the operation of the 103rd step.

That is, in the case of step 103, since the difference between the room temperature and the desired temperature is generated a lot, the heating must be set very strongly.

However, when the condition of the step 100 is not satisfied, the controller 1 determines whether the desired temperature is higher than a predetermined temperature (β ° C.) or higher than the currently detected room temperature (step 106). That is, step 106 is to determine whether the diffuse loading condition is appropriate to perform the second mode.

When the condition of step 106 is satisfied, the controller 1 sends an operation signal to the first and second compressor driving units 7 and 9 and outputs an operation signal to the first heater driving unit 11 (step 109). ). Under the control of step 109, the first and second compressors 15 and 17 and the first heater 19 are turned on to perform heating operation.

After the control in step 109, the controller 1 determines the current operating state of the second heater 21 (step 112). If the second heater 21 is in the on state in step 112, after the process in step 109, the second heater 21 is kept in the on state as is (step 118). If the second heater 21 is in the off state, the second heater 21 is controlled to be in the off state as it is after the progress of the step 109 (step 115).

As described above, performing variable control of the second heater 21 according to the current operating state is to prevent frequent on / off operation of the second heater 21 near the boundary point between the first mode and the second mode. to be.

Next, when the conditions of steps 100 and 106 are not satisfied, it is determined whether the room temperature is lower than the desired temperature, and it is determined whether the heating load condition is suitable for the third mode (step 121).

When the condition of step 121 is satisfied, the first and second compressors 15 and 17 are controlled to an on state, but the second heater 21 is controlled to an off state (step 124). In operation 127, the current operating state of the first heater 19 is determined. When the first heater 19 is currently in the ON state in step 127, the ON state is continuously maintained even in the third mode (Step 130), and the first heater 19 is currently in OFF state in the step 127. In this case, the state is kept off in the third mode (step 133).

That is, in the third mode, the heating operation is performed by the operation of the first and second compressors 15 and 17, and the second heater 21 is completely turned off, and then the operation of the first heater 19 is performed. Variable control.

The variable control operation of the first heater 19 is to prevent frequent on / off driving of the first heater 19 near the boundary point of the second mode and the third mode as mentioned above.

Step 136 is a step of determining whether the heating load condition is suitable for the fourth mode. In the step 136, the room temperature is higher than the desired temperature, and the difference between the room temperature and the desired temperature is lower than the predetermined temperature (γ ° C).

When the condition of the step 136 is satisfied, the first compressor 15 is controlled to the on state, and the first and second heaters 19 and 21 are controlled to the off state (step 139). Then, the current operating state of the second compressor 17 is determined (step 142).

When the current operating state of the second compressor 17 is in the ON state in step 142, the second compressor 17 is controlled to the ON state (Step 145). The compressor 17 is controlled to the off state (step 148).

That is, in the fourth mode, the heating operation is performed by the first compressor 15, the first and second heaters 19 and 21 are completely turned off, and the operation of the second compressor 17 is currently Variable control is performed based on the operation state of.

Even if the above procedure is not satisfied by the temperature difference between the desired temperature and the indoor temperature, the temperature difference obtained by subtracting the desired temperature from the indoor temperature as the fifth judgment condition according to the fifth mode is equal to or greater than a predetermined temperature (γ ° C.). Then, it is determined whether the temperature is lower than the predetermined temperature (? ° C) (step 151).

When the condition of step 151 is satisfied, both the second compressor 17 and the first and second heaters 19 and 21 are controlled to be in an off state (step 157). In operation 160, it is determined whether the current operation state of the first compressor 15 is on. Then, the operating state of the first compressor 15 is maintained in accordance with the current operating state. That is, step 163 is a case where the current operating state is on, and step 166 is a case where the current operating state is off.

Finally, when the room temperature is higher than the desired temperature by a predetermined temperature (δ ° C.), it is determined that the room is completely adjusted to a comfortable state, and the first and second compressors 15 and 17 and the first and second heaters 19 and 21 are determined. Control to the off state (step 154). Step 154 is a heating load condition according to the sixth mode.

That is, the present invention is characterized in that in the air conditioner composed of two compressors and two heaters, the temperature difference between the desired temperature and the room temperature is divided into various ranges, and the compressor and the heater are appropriately driven according to each range. Therefore, if the desired temperature is higher than the room temperature, the two compressors and the two heaters are operated when the predetermined value is higher than the predetermined value, and when the temperature difference gradually decreases below the predetermined value, the two compressors and the one heater are operated. By control, the operating states of the compressor and the heater are appropriately adjusted according to the range of the temperature difference.

As described above, the heating operation control method of the air conditioner according to the present invention, while reducing the power consumption by selectively driving the first and second compressors and the first and second heaters according to the difference between the room temperature and the user's desired temperature. There is an advantage to achieve comfortable heating. In addition, the first, second compressors and the first and second heaters are prevented from being frequently turned on and off, thereby preventing the failure of the compressor and the heater, and at the same time improving the reliability and life of the product.

Claims (9)

In an air conditioner having at least one compressor and at least one heater to perform a heating operation: A first step of dividing the range of the temperature difference between the room temperature and the desired temperature into a plurality and setting operating conditions of the compressor and the heater in each range; Detecting a current room temperature; Calculating a temperature difference between the current room temperature and the desired temperature; And a fourth step of determining in which range the calculated temperature difference falls within the preset range, and controlling the operation of the compressor and the heater according to a preset operating condition. The method of claim 1 wherein: The first step, the heating operation control method of the air conditioner, characterized in that the operating conditions are set so that the plurality of compressors and heaters are sequentially controlled according to the difference between the room temperature and the desired temperature. The method of claim 2 wherein: The first step is the heating operation control method of the air conditioner, characterized in that all the compressors and all the heaters are turned on when the temperature difference minus the desired temperature from the room temperature is above a predetermined temperature (-α ℃). The method of claim 2 wherein: In the first step, when all the difference between the desired temperature and the desired temperature is greater than or equal to a predetermined temperature (−α ° C.) and less than or equal to a predetermined temperature (−β ° C.), all compressors and one heater are controlled to be in an on state. Heating operation control method of the air conditioner. The method of claim 2 wherein: In the first step, when the temperature difference obtained by subtracting the desired temperature from the room temperature is greater than or equal to a predetermined temperature (−β ° C.) and less than 0 ° C., all the compressors are controlled to an on state, and the second heater is controlled to an off state. Heating operation control method of the air conditioner. The method of claim 2 wherein: In the first step, when the temperature difference obtained by subtracting the desired temperature from the room temperature is equal to or higher than 0 ° C. and lower than the predetermined temperature (γ ° C.), the first compressor is controlled to be in an on state and the first and second heaters are controlled to be in an off state. Heating operation control method of the air conditioner, characterized in that. 7. The method of claim 4, wherein: The compressor or heater, the operation is not set in the first step, the heating operation control method of the air conditioner, characterized in that the operating state is set variable according to the current operating state. The method of claim 2 wherein: In the first step, when the temperature difference obtained by subtracting the desired temperature from the room temperature is equal to or greater than the predetermined temperature (γ ° C.) and equal to or less than the predetermined temperature (δ ° C.), the second compressor and all heaters are controlled to be in an off state, and the first compressor is Heating operation control method of the air conditioner, characterized in that to maintain the current operating state. The method of claim 2 wherein: The first step is the heating operation control method of the air conditioner, characterized in that all the compressors and all the heaters are controlled to be turned off when the room temperature is a predetermined temperature (δ ℃) or more than the desired temperature.