KR100309732B1 - Control method of initial power saving operation of air conditioner - Google Patents

Abstract

The present invention relates to a control method of the initial power saving operation of the air conditioner, the normal operation step of maintaining the indoor temperature at the set temperature by controlling the compressor on / off according to the comparison result of the set temperature and the room temperature input by the user, A signal input judging step of judging whether a power saving operation signal has been input; a compressor on judging step of judging whether a power saving operation signal has been input in the signal input judging step; If it is determined that the power saving set temperature calculation step of calculating the power saving set temperature according to the room temperature and the set temperature at the time of the compressor on, and the compressor according to the comparison result of the power saving set temperature and room temperature calculated in the power saving set temperature calculation step Power saving operation step to maintain the indoor temperature at the power saving set temperature by controlling the on / off It can reduce the discomfort felt by the user by preventing the sudden change of temperature and prolonged turning off of the compressor by gradually changing the set power saving temperature at the time of all inrush.

Description

Control method of initial power saving operation of air conditioner

The present invention relates to an air conditioner that performs a power saving operation by shortening the compressor on time to a power saving setting temperature higher than the setting temperature in normal operation. In particular, the air conditioner prevents the compressor from being turned off for a long time by gradually changing the power saving setting temperature at the start of the power saving operation. It relates to a control method of the initial power saving operation of the air conditioner.

In general, air conditioners are classified into various types according to their function or configuration of the unit. In terms of function, air conditioners can be classified into cooling only, cooling and dehumidification only, and cooling and heating. It is divided into an integrated type that is installed in a window and the like and a separate type that separates and installs a cooling device on the indoor side and a heat dissipation and compression device on the outdoor side.

The separate type air conditioner includes a multi type for air conditioning a plurality of indoor spaces by connecting two or more indoor units to one outdoor unit.

In the conventional separate type air conditioner, as shown in FIG. 1, the indoor unit 10 installed indoors and the outdoor unit 20 installed outdoors operate as one system, and heating and cooling operations as necessary. Can be.

The outdoor unit 20 includes a compressor 30 for compressing a refrigerant into a gaseous state at high temperature and high pressure, and a gas refrigerant compressed at high temperature and high pressure in the compressor 30 according to operating conditions (cooling or heating). Valve 35 and an outdoor heat exchanger 40 for condensing the gas refrigerant compressed by the high temperature and high pressure in the compressor 30 at the time of cooling operation with air blown by the outdoor fan 41 to cool and condense the liquid refrigerant with low temperature and high pressure. ), A capillary tube 50 for expanding under reduced pressure into a low-temperature, low-pressure free refrigerant which is easy to evaporate, and a refrigerant liquefied in an indoor heat exchanger which will be described later in the heating operation. The capillary tube (50) for heating and decompression expansion into a low-temperature, low-pressure free refrigerant easy to evaporate with the capillary tube (50), and the one-way valve (70) for turning on the refrigerant flow in one direction so that the refrigerant passes only during the cooling operation It is.

In the indoor unit 10, the low-temperature low-pressure free refrigerant passing through the capillary tube 50 during the cooling operation is exchanged with air blown by the indoor fan 81 to evaporate as a low-temperature low-pressure completely gaseous refrigerant gas. An indoor heat exchanger 80 for converting is provided.

During the cooling operation of the air conditioner configured as described above, the four-way valve 35 is turned off, and the refrigerant is shown in the direction of the solid arrow in FIG. 1, and the compressor 30 → the four-way valve 35 → the outdoor heat exchanger 40. ?) One-way valve 70 → capillary tube 50 → indoor heat exchanger 80 → four-way valve 35 → compressor 30 to form a refrigerant cycle.

On the other hand, during the heating operation, the four-way valve 35 is turned on so that the refrigerant is shown in the direction of the dotted arrow in FIG. 1, such as the compressor 30 → the four-way valve 35 → the indoor heat exchanger 80 → the capillary tube 50. → a refrigerant cycle circulated in the order of the heating capillary 60 → the outdoor heat exchanger 40 → the four-way valve 35 → the compressor 30.

In the air conditioner for cooling and heating operation by forming the refrigerant cycle as described above, the user operates the key operation unit provided on the control panel of the remote controller or the indoor unit 10 (not shown). After pressing), input the desired operation mode (for example, cooling), the set temperature (Ts) and the set air volume, the indoor unit 10 starts to operate, and first, the indoor fan 81 rotates according to the set air volume. Indoor air begins to be sucked into the indoor unit (10).

At this time, when the temperature of the indoor air sucked into the indoor unit 10 is detected by a temperature sensor (not shown) in the indoor unit 10, the indoor unit 10 compares the set temperature Ts with the room temperature Tr to determine the room temperature ( When Tr is higher than the set temperature Ts, the compressor 30 is turned on as shown in FIG.

When the compressor 30 is turned on, a refrigerant cycle is made in the solid arrow direction of FIG. 1. First, the high-temperature, high-pressure gas refrigerant discharged from the compressor 30 of the outdoor unit 20 is exchanged for outdoor heat through the four-way valve 35. When the gas is introduced into the gas 40, the outdoor heat exchanger 40 exchanges the gas refrigerant compressed at high temperature and high pressure with air blown by the outdoor fan 41, forcibly cools it, and condenses it. The liquid refrigerant of low temperature and high pressure condensed in is introduced into the capillary tube 50 through the one-way valve 70.

The low temperature and high pressure liquid refrigerant introduced into the capillary tube 50 is expanded into a low temperature low pressure free refrigerant which is easy to evaporate and flows into the indoor heat exchanger 80 installed in the indoor unit 10, and the capillary tube in the indoor heat exchanger 80. When the low-temperature, low-pressure free refrigerant depressurized through the 50 passes through several pipes and evaporates and vaporizes, it cools the indoor air by taking heat from the air blown by the indoor fan 81, and cooling the indoor air. Cold air) is discharged into the room to perform a cooling operation, and the low-temperature low-pressure gas refrigerant cooled by the indoor heat exchanger 80 flows into the compressor 30 again, and the refrigerant of high temperature and high pressure is caused by the adiabatic compression action of the compressor 30. Converted to gas and repeats the refrigerant cycle described above.

When the cooling operation is performed for a predetermined time as described above, since the temperature of the indoor air is gradually lowered, when the indoor temperature Tr reaches the set temperature Ts by detecting the changing room temperature Tr at this time, it is shown in FIG. As shown, the compressor 30 is turned off.

As the compressor 30 is turned off, the temperature Tr of the indoor air is gradually increased, and when the room temperature Tr reaches the set temperature Ts + 1 ° C., as shown in FIG. 2, the compressor 30 is again turned on. By repeating the procedure of lowering the room temperature Tr to the set temperature Ts by turning on, the normal operation of maintaining the room temperature Tr at the set temperature Ts is performed as shown in the normal operation section of FIG. 2.

In the normal operation as described above, if the user selects the power saving operation, the set temperature Tm during the power saving operation is set higher than the set temperature Ts during the normal operation according to the change of the indoor temperature and the time to reach the set temperature. Is higher than the power saving set temperature Tm, the compressor 30 is turned on as shown in FIG.

As the compressor 30 is turned on, the temperature Tr of the indoor air is gradually lowered, and when the room temperature Tr reaches the power saving set temperature Tm, the compressor 30 is turned off, as shown in FIG. 2.

As the compressor 30 is turned off, the temperature Tr of the indoor air is gradually increased, and when the room temperature Tr reaches the power saving set temperature Tm + 1 ° C., as shown in FIG. 2, the compressor 30 is turned off. By repeatedly turning on and lowering the room temperature Tr to the power saving set temperature Tm, as shown in the power saving operation section of FIG. 2, by maintaining the room temperature Tr at the power saving set temperature Tm, the compressor ( 30) A power saving operation is performed to shorten the on time.

However, in the conventional power saving operation method, as shown in the oval of FIG. 2 when the normal operation enters the power saving operation, the user is uncomfortable during the off time of the compressor 30 because the compressor 30 is turned off for a long time. There was a problem that you can feel.

Accordingly, the present invention has been made to solve the above-described problems, and by gradually changing the power-saving setting temperature during the initial power-saving operation to prevent sudden temperature changes and long-term off of the compressor to reduce the user's discomfort It is to provide a control method of the initial power saving operation of the harmonic.

In order to achieve the above object, an initial power saving operation control method of an air conditioner according to the present invention may be configured to maintain an indoor temperature at a set temperature by controlling a compressor on / off according to a comparison result between a set temperature input by a user and an indoor temperature. A signal input judging step of judging whether the power saving operation signal is inputted; a compressor on judging step of judging whether a power saving operation signal has been input in the signal input judging step; When it is determined that the compressor is on in the determination step, the power saving setting temperature calculating step of calculating the power saving setting temperature according to the indoor temperature and the setting temperature of the compressor on point and the comparison of the power saving setting temperature and the indoor temperature calculated in the power saving setting temperature calculating step As a result of the power saving operation step of controlling the compressor on / off according to the result to maintain the room temperature at the power saving set temperature Characterized in that made.

1 is a refrigerant cycle diagram of a general air conditioner,

Figure 2 is a state diagram of the operation of the compressor according to the set temperature compared to the conventional room temperature,

3 is a control block diagram of an initial power saving operation control apparatus of an air conditioner according to an embodiment of the present invention;

4 is a flowchart showing an operation procedure of initial power saving operation of an air conditioner according to the present invention;

5 is an operation state of the compressor according to the set temperature compared to the room temperature during the power saving operation of the air conditioner according to the present invention,

6 is a table showing a change in power saving setting temperature during the power saving operation of the air conditioner according to the present invention.

<Explanation of symbols for the main parts of the drawings>

30: compressor 40: outdoor heat exchanger

41: outdoor fan 50: capillary tube

80: indoor heat exchanger 81: indoor fan

102: operation operation means 104: control means

106: room temperature sensing means 110: compressor driving means

112: outdoor fan motor driving means 114: indoor fan motor driving means

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

Since the refrigerant cycle diagram of the air conditioner according to the present invention is the same as the conventional configuration shown in Fig. 1, the same name and the same reference numerals are specified to omit overlapping descriptions.

As shown in FIG. 3, the power supply means 100 converts a commercial AC voltage supplied from an AC power supply terminal (not shown) into a predetermined DC voltage necessary for the operation of the air conditioner, and outputs the same. Has a plurality of function keys for inputting the operation mode (automatic, cooling, dehumidification, blowing, heating, etc.) of the air conditioner, the set air volume, and the set temperature (Ts), as well as the operation / stop of the air conditioner. And a power saving operation key for inputting a power saving operation key and a power saving operation stop.

And, the control means 104 is applied to the DC voltage output from the power supply means 100 to initialize the air conditioner, as well as the air conditioning in accordance with the operation selection signal input by the operation operation means (102) As a microcomputer for controlling the overall operation of the machine, this control means 104 gradually changes the set temperature Tg at the time of power saving operation in accordance with the power saving operation formula at the time of initial power saving operation.

The indoor temperature detecting means 106 is sucked into the indoor unit 10 to control the indoor temperature to the temperature Ts set by the user by the driving operation means 102 to perform cooling operation and power saving operation of the air conditioner. The temperature Tr of the indoor air is sensed, and the outdoor temperature detecting means 108 senses the temperature of the outdoor air that changes during the operation of the air conditioner and outputs the temperature to the control means 104.

In addition, the compressor driving means 110 is controlled according to the comparison result of the temperature Ts set by the user by the operation operation means 102 and the room temperature Tr sensed by the room temperature sensing means 106. Receiving a control signal output from the means 104 to control the compressor 30 on / off, and at the same time control the compressor 30 in accordance with the set temperature (Tg) calculated by the control means 104 during the power saving operation .

The outdoor fan motor driving means 112 is configured according to a comparison result of the temperature Ts set by the user by the driving operation means 102 and the indoor temperature Tr sensed by the indoor temperature sensing means 106. The outdoor fan 41 is driven by controlling the rotation speed of the outdoor fan motor to receive the control signal output from the control means 104 and blow the air heat exchanged by the outdoor heat exchanger 40 to the outside.

In addition, the indoor fan motor driving means 114 receives the control signal output from the control means 104 in accordance with the air volume set by the user by the operation operation means 102 is heat exchanged in the indoor heat exchanger (80) The indoor fan 81 is driven and controlled by controlling the rotation speed of the indoor fan motor to blow air (cold or warm air) into the room.

In addition, in the drawing, the display means 116 displays the operation selection mode (automatic, cooling, dehumidifying, blowing, heating, power saving, etc.) input by the driving operation means 102 under the control of the control means 104. The display, as well as the operating state of the air conditioner.

Hereinafter, the operation and effect of the initial power saving operation control method of the air conditioner configured as described above will be described.

FIG. 4 is a flowchart showing an initial power saving operation control operation procedure of the air conditioner according to the present invention, in which S denotes a step.

First, when power is applied to the air conditioner, the power supply means 100 converts a commercial AC voltage supplied from an AC power terminal (not shown) into a predetermined DC voltage required for driving the air conditioner, thereby driving each circuit and control means ( Output to 104).

Therefore, in step S1, the DC voltage output from the power supply means 100 is input from the control means 104 to initialize the air conditioner.

At this time, when the user operates the operation operation means 102 and presses the operation key, and inputs the operation mode (for example, cooling), the set temperature Ts, and the set air volume of the desired air conditioner, the operation operation means 102. ), An operation start signal (hereinafter referred to as an operation signal) and an operation selection signal are input to the control means 104.

Accordingly, in step S2, the control means 104 determines whether the driving signal is input from the driving operation means 102, and maintains the air conditioner in the operation standby state when the driving signal is not input (NO). The operation of step S2 and below is repeated.

As a result of the discrimination in step S2, when the operation signal is input (YES), the flow advances to step S3, and the control means 104 controls the room temperature Tr in accordance with the set temperature Ts to operate normally in FIG. As shown in the section, the air conditioner is operated normally.

That is, the compressor driving means 110 turns on the compressor 30 when the indoor temperature Tr is higher than the set temperature Ts by comparing the set temperature Ts and the room temperature Tr in the control means 104. The control signal is output to the compressor driving means 110, and the compressor 30 receives the control signal output from the control means 104 to turn on the compressor 30.

As the compressor 30 is turned on, when the temperature Tr of the indoor air is gradually lowered and the room temperature Tr reaches the set temperature Ts, the compressor driving means 110 outputs a control signal output from the control means 104. Receives the input to turn off the compressor (30).

As the compressor 30 is turned off, the temperature Tr of the indoor air gradually increases, and when the room temperature Tr reaches the set temperature Ts + 1 ° C., the compressor driving means 110 outputs from the control means 104. As the control signal is input, the compressor 30 is turned on again to repeat the process of lowering the room temperature Tr to the set temperature Ts to set the room temperature Tr as shown in the normal operation section of FIG. 5. Normal operation is performed to maintain the temperature Ts.

In the normal operation as described above, in step S4, the power saving operation key of the driving operation means 102 is turned on to determine whether the power saving operation signal is input from the operation operation means 102 to the control means 104, and the power saving operation signal is generated. If no input is made (NO), the flow returns to step S3 to repeat the operation of step S3 and below.

As a result of the discrimination in step S4, when a power saving operation signal is input (YES), the flow advances to step S5, and the control means 104 determines whether the compressor 30 is on.

As a result of the discrimination in step S5, if the compressor 30 is in the ON condition (YES), the process proceeds to step S6 to determine whether the three minute delay time (the delay time for protecting the compressor) has elapsed, and the three minute delay time is determined. If it has not elapsed (NO), the operation below step S6 is repeated until the three minute delay time has elapsed.

As a result of the discrimination in step S6, when the 3 minute delay time has elapsed (YES), the control means 104 sends a control signal for driving the compressor 30 to the compressor drive means 110. Output

Accordingly, the compressor driving means 110 receives the control signal output from the control means 104 to drive (on) the compressor 30 as shown in the power saving operation section of FIG. 5.

When the compressor 30 is turned on, the high temperature and high pressure gas refrigerant discharged from the compressor 30 of the outdoor unit 20 flows into the outdoor heat exchanger 40, and the outdoor heat exchanger 40 is compressed to high temperature and high pressure. The gas refrigerant is heat-exchanged with air blown by the outdoor fan 41 and forcedly cooled to condense. The low-temperature, high-pressure liquid refrigerant condensed in the outdoor heat exchanger 40 is introduced into the capillary tube 50.

The low temperature and high pressure liquid refrigerant introduced into the capillary tube 50 is expanded into a low temperature low pressure free refrigerant which is easy to evaporate, and flows into the indoor heat exchanger 60 installed in the indoor unit 10, and the refrigerant in the indoor heat exchanger 60. Evaporates and evaporates to remove heat from the air blown by the indoor fan 61 to cool the indoor air, and then discharges the cooled air (cold air) to the room to perform a cooling operation. The indoor heat exchanger 60 At low temperature, the low-temperature gas refrigerant is introduced into the compressor 30 again, and is converted into a high-temperature high-pressure refrigerant gas by the adiabatic compression action of the compressor 30 to repeat the refrigerant cycle along the solid arrow direction of FIG. 1. Cooling is performed.

Subsequently, in step S8, the control means 104 sets the power saving set temperature Tg at the time of power saving operation by using the following power saving operation control formula at the time when the compressor 30 is turned on.

Tg = Ts + (Tr-Ts) x 0.4 (Energy Saving Factor) .... (1)

Here, Tg: power saving setting temperature, Ts: setting temperature, and Tr: room temperature at the time of compressor on-off, rounding off after 2 decimal places.

Therefore, in the power saving operation, the on / off operation of the compressor 30 is controlled based on the power saving setting temperature Tg reset higher than the setting temperature Ts in the normal operation.

When the power saving setting temperature Tg is calculated, the indoor temperature sensing means 106 detects the temperature Tr of the indoor air sucked into the indoor unit 10 at this time in step S9.

Therefore, in step S10, the control means 104 receives the analog data of the room temperature Tr sensed by the room temperature sensing means 106 and converts it into digital, and then the room temperature Tr and the power saving set temperature Tg. ) To determine whether the room temperature Tr is equal to or lower than the power saving set temperature (Tg), and if the room temperature (Tr) is not equal to or lower than the power saving set temperature (Tg) (if NO), the operation of step S10 or less Repeat

As a result of the discrimination in step S10, when the room temperature Tr is equal to or lower than the power saving set temperature Tg (YES), the flow advances to step S11, and the control means 104 supplies a control signal for stopping the compressor 30. Output to the drive means (110).

Accordingly, the compressor driving means 110 receives the control signal output from the control means 104 and stops (off) the compressor 30 as shown in the power saving operation section of FIG. 5.

If the operation continues in this state, the room temperature Tr gradually rises, so in step S12 it is determined whether the room temperature Tr is equal to or greater than the power saving set temperature Tg + a (= 1.0 ° C), and the room temperature Tr. Is not more than the power saving set temperature Tg + a (NO), the flow returns to the step S11 and the operation of the step S11 or less is repeated while the compressor 30 is turned off.

As a result of the discrimination in step S12, when the room temperature Tr is equal to or greater than the power saving set temperature Tg + a (YES), the control means 104 controls the compressor driving means 110. As shown in the power saving operation section 5, the compressor 30 is turned on again to perform the power saving operation in which the room temperature Tr is maintained at the power saving setting temperature Tg at the time of power saving operation.

Subsequently, at step S14, the control means 104 returns while resetting the power saving set temperature Tg at the time of power saving operation in accordance with the power saving operation control formula shown in Equation (1) above when the compressor 30 is turned on.

On the other hand, when the determination result in step S5 indicates that the compressor 30 is not in the on condition (NO), the process proceeds to step S12 to determine whether the room temperature Tr is equal to or higher than the power saving set temperature Tg + a. If the temperature Tr is equal to or higher than the power saving setting temperature Tg + a, as shown in the power saving operation section in FIG. 5, the compressor 30 is turned on to return while resetting the power saving setting temperature Tg during the power saving operation.

Therefore, as shown in the ellipse of Fig. 5 and the diagram of Fig. 6 (change of the power saving set temperature when the set temperature is 25 ° C. and a = 1.0 ° C.), the power saving set temperature Tg is gradually changed gradually to achieve a sudden temperature change. It is possible to reduce the discomfort due to the long time off of the compressor (30).

According to the control method of the initial power saving operation of the air conditioner according to the present invention as described above, by changing the power saving setting temperature gradually during the initial power saving operation, to prevent the sudden temperature change and the compressor for a long time off, the user feels unpleasant It can reduce the effect.

Claims (2)

A normal operation step of controlling the compressor on / off according to a comparison result between the set temperature and the room temperature input by the user to maintain the indoor temperature at the set temperature; A signal input discrimination step of determining whether a power saving operation signal has been input; A compressor on judging step of judging whether or not a compressor temperature condition is input when it is determined that a power saving operation signal is input in the signal input judging step; A power saving setting temperature calculating step of calculating a power saving setting temperature based on an indoor temperature and a setting temperature at the time when the compressor is turned on, when it is determined that the compressor is in an on state in the compressor on-temperature discrimination step; And a power saving operation step of controlling the compressor to be turned on or off based on a comparison result of the power saving setting temperature and the room temperature calculated in the power saving setting temperature calculating step to maintain the indoor temperature at the power saving setting temperature. Control method of initial power saving operation of the unit. The method of claim 1, wherein the power saving setting temperature calculating step gradually changes the power saving setting temperature step by step according to a change in the room temperature at the time when the compressor is turned on.