KR100275557B1 - Compressor controller and method for air conditioner - Google Patents

Abstract

PURPOSE: A control system of a compressor is provided to regulate a cycle in turning on a compressor and to smoothen air flow by turning off the compressor after passage of specific time. CONSTITUTION: A control system of a compressor consists of: a control panel(102) for inputting set temperature; an indoor temperature sensor(106) for sensing indoor temperature; a control unit(104) controlling drive of a compressor(30) and an outdoor fan(111) by comparing the detected indoor temperature with the set temperature after passage of the minimum run time of the compressor; and drive units(108,110) for driving the compressor and the outdoor fan according to a control signal from the control unit. If the on time of the compressor has not passed yet, the compressor is not turned off even though the indoor temperature reaches the set temperature. Therefore, a cycle is regulated and indoor air flow is smoothened.

Description

Compressor controller and method for air conditioner

The present invention relates to an air conditioner, and in particular, when the compressor on time is countered and the predetermined temperature is less than the predetermined time, the compressor is turned off after a predetermined time without turning off the compressor even if the room temperature reaches the set temperature. The height relates to a compressor control device of an air conditioner and a method thereof.

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 of high temperature and high pressure, and a gas refrigerant compressed at high temperature and high pressure in the compressor 30 by heat exchanged with air blown by the outdoor fan 41 to form a low temperature. An outdoor heat exchanger (40) for cooling and condensing with a high pressure liquid refrigerant, and a capillary tube (50) for decompressively expanding the low temperature and high pressure liquid refrigerant cooled and condensed in the outdoor heat exchanger (40) with a low temperature and low pressure free refrigerant which is easy to evaporate. The indoor unit 10 converts the low-temperature low-pressure free refrigerant having passed through the capillary tube 50 into a completely low-temperature, low-pressure full-gas refrigerant while evaporating by heat exchange with air blown by the indoor fan 61. An indoor heat exchanger (60) is installed.

In the air conditioner configured as described above, a user operates a key operation unit provided on a control panel of a remote controller or indoor unit 10 (not shown) and presses an operation / stop key (hereinafter referred to as an operation key), and then selects a desired operation mode ( For example, when the cooling) and the set temperature (Ts) and the set air volume are input, the indoor unit 10 starts to operate. First, the indoor fan 61 is rotated according to the set air volume so that the indoor air enters the indoor unit 10. Begins to inhale.

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, as shown in Fig. 2, the compressor 30 and the outdoor fan 41 are turned on.

When the compressor 30 is turned on, a refrigerant cycle is made in the solid arrow direction of FIG. 1. When 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, In the outdoor heat exchanger (40), the gas refrigerant compressed at high temperature and high pressure is condensed by forced cooling by heat exchange with air blown by the outdoor fan (41), and the low temperature and high pressure liquid refrigerant condensed in the outdoor heat exchanger (40). Is introduced into the capillary 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 The low-temperature low-temperature gas refrigerant is cooled into the compressor 30 again and converted into a high-temperature high-pressure refrigerant gas by the adiabatic compression action of the compressor 30 to repeat 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 in FIG. 2, when the compressor 30 and the outdoor fan 41 of the outdoor unit 20 are turned off and the room temperature Tr rises again to the set temperature Ts + 0.5 ° C., the outdoor unit ( The compressor 30 of the 20 and the outdoor fan 41 are turned on again to perform a cooling operation.

However, in the conventional air conditioner configured as described above, the indoor temperature Tr is controlled to 0.5 ° C on the basis of the set temperature Ts so that the compressor 30 and the outdoor fan 41 of the outdoor unit 30 are frequently interrupted. There is a problem that the air flow is not smooth and the comfort is lowered, the instantaneous operating current suddenly rises when the compressor 30 is turned on / off to increase the power consumption.

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, and if the compressor on time is countered and the predetermined temperature is less than the predetermined time, the compressor is turned off after a predetermined time without turning off the compressor even if the room temperature reaches the set temperature. The present invention provides a compressor control apparatus and a method of an air conditioner that stabilizes a cycle and smoothes indoor air flow to increase comfort.

In order to achieve the above object, the compressor control apparatus of an air conditioner according to the present invention performs a cooling operation by circulating a refrigerant in the order of a compressor, an outdoor heat exchanger, a capillary tube, and an indoor heat exchanger, and performs heat exchange in the outdoor heat exchanger. An air conditioner having an outdoor fan for circulating outdoor air, comprising: an operation operation means for inputting a set temperature, an indoor temperature detection means for detecting an indoor temperature, and a compressor on time of a minimum time by counting the on time of the compressor Control means for controlling the operation of the compressor and the outdoor fan by comparing the indoor temperature detected by the indoor temperature sensing means and the set temperature input by the operation operation means when the time elapses, and a control signal from the control means. According to the characterized in that the drive means for driving the compressor and the outdoor fan.

In addition, the compressor control method of the air conditioner according to the present invention performs the cooling operation by circulating the refrigerant in the order of the compressor, the outdoor heat exchanger, the capillary tube and the indoor heat exchanger, by the outdoor fan to perform heat exchange in the outdoor heat exchanger. A method of operating an air conditioner for circulating outdoor air, the method comprising: a set temperature input step of inputting a set temperature, an indoor temperature detection step of detecting an indoor temperature, and an indoor temperature detected in the indoor temperature detection step, An outdoor temperature step of turning on the compressor and the outdoor fan when the temperature is greater than the set temperature input in the input step, and a time discriminating step of determining whether the compressor on time has passed the minimum operating time by counting the on time of the compressor, and determining the time. In the step, when the compressor on time passes the minimum operating time, the temperature discrimination to compare the room temperature and the set temperature And an outdoor unit control step of turning off the compressor and the outdoor fan when the indoor temperature is lower than the set temperature in the temperature discriminating step, and turning on the compressor and the outdoor fan when the indoor temperature is above a predetermined temperature. do.

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

2 is a driving load state diagram according to a set temperature compared to a conventional room temperature;

3 is a control block diagram of a compressor control apparatus of an air conditioner according to an embodiment of the present invention;

4 is a driving load state diagram according to the set temperature compared to the room temperature according to the present invention;

5a and 5b is a flow chart showing the operation sequence of the compressor control of the air conditioner according to the present invention,

<Description of the code | symbol about the principal part of drawing>

30: compressor 40: outdoor heat exchanger

41: outdoor fan 50: capillary tube

60: indoor heat exchanger 102: operation operation means

104: control means 108: compressor driving means

110: outdoor 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. A driving key for inputting is provided.

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, the control means 104 counters the on time of the compressor 30 so that a predetermined time (minimum operating time; delay time for cycle stability and smooth flow of indoor air) has elapsed. The compressor 30 and the outdoor fan 41 are turned on / off by comparing the indoor temperature Tr and the set temperature Ts.

The indoor temperature detecting means 106 detects the temperature Tr of the indoor air 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.

In addition, the compressor driving means 108 is based on a comparison result of the temperature Ts set by the user by the driving operation means 102 and the room temperature Tr sensed by the room temperature sensing means 106. Receiving a control signal output from the control means 104 controls the compressor 30 on / off, the outdoor fan motor driving means 110 is the temperature (Ts) set by the user by the operation operation means 102 and According to the comparison result of the indoor temperature (Tr) sensed by the indoor temperature detection means 106 receives the control signal output from the control means 104 and blows the air heat-exchanged in the outdoor heat exchanger 40 to the outside The outdoor fan motor 111 is controlled on / off so as to drive the outdoor fan 41.

The indoor fan motor driving means 112 receives the control signal output from the control means 104 according to the air volume set by the user by the driving operation means 102 and the heat exchanged in the indoor heat exchanger 60 ( Drive the indoor fan 61 by controlling the rotation speed of the indoor fan motor to blow 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, etc.) input by the driving operation means 102 under the control of the control means 104. Of course, the operating state of the air conditioner.

Hereinafter, the effect of the compressor control apparatus and method of the air conditioner configured as described above will be described.

5A and 5B are flowcharts showing the compressor control operation procedure of the air conditioner according to the present invention, in which S denotes a step (STEP) in FIGS. 5A and 5B.

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, in step S2, the user operates the operation operation means 102 and presses the operation key, and then inputs the operation mode (for example, cooling), the set temperature Ts, and the set air volume of the desired air conditioner. From the 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 S3, the control means 104 determines whether the driving signal is input from the driving operation means 102, and maintains the air conditioner in the operating standby state when the driving signal is not input (NO). The operation below step S3 is repeatedly performed.

As a result of the discrimination in step S3, when the operation signal is input (YES), the control means 104 proceeds to step S4 and the control means 104 drives (on) the indoor fan 61 to perform the cooling operation. Is output to the indoor fan motor driving means (112).

Therefore, the indoor fan motor driving means 112 receives the control signal output from the control means 104 in accordance with the set air volume to control the rotation speed of the indoor fan motor to drive the indoor fan 61.

When the indoor fan 61 is turned on, the indoor air starts to be sucked into the indoor unit 10. In step S5, the temperature Tr of the indoor air sucked into the indoor unit 10 at this time is measured by the indoor temperature detecting means 106. Detect.

Accordingly, in step S6, 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 set temperature Ts. ) To determine if the room temperature (Tr) is greater than the set temperature (Ts).

As a result of the determination in step S6, if the room temperature Tr is not greater than the set temperature Ts (NO), the operation of step S6 or less is repeated while continuously detecting the room temperature Tr, and If the temperature Tr is greater than the set temperature Ts (YES), the control means 104 advances the control signal 104 to the compressor driving means for driving the compressor 30 and the outdoor fan motor 111. Output to the 108 and the outdoor fan motor driving means (110).

Therefore, the compressor driving means 108 receives the control signal output from the control means 104 and drives the compressor 30 as shown in FIG. 4, and in the outdoor fan motor driving means 110. In response to the control signal output from the control means 104, the outdoor fan 41 is driven (on) as shown in FIG.

When the compressor 30 and the outdoor fan 41 are 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. In the high-temperature, high-pressure gas refrigerant compressed by the heat exchanged by the air blown by the outdoor fan 41 forcibly cooled and condensed, the low-temperature high-pressure liquid refrigerant condensed in the outdoor heat exchanger 40 flows into the capillary tube (50) do.

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.

At this time, in step S8, the control means 104 counters the on time of the compressor 30 to determine whether the on time of the compressor 30 has passed the minimum operation time (delay time for cycle stability and smooth flow of indoor air). If the minimum operation time has not elapsed (NO), the operation is returned to the step S7 so as not to turn off the compressor 30 even if the room temperature Tr reaches the set temperature Ts. Repeat.

As a result of the discrimination in step S8, when the on time of the compressor 30 has passed the minimum operation time (YES), the process proceeds to step S9 to determine whether the room temperature Tr is equal to or lower than the set temperature Ts, If the temperature Tr is not equal to or lower than the set temperature Ts (NO), the flow returns to step S7 to repeat the operation of step S7 or less.

As a result of the discrimination in step S9, when the room temperature Tr is equal to or lower than the set temperature Ts (YES), the control means 104 controls to stop the compressor 30 and the outdoor fan motor. The signal is output to the compressor driving means 108 and the outdoor fan motor driving means 110.

Accordingly, the compressor driving means 108 receives the control signal output from the control means 104 and stops (off) the compressor 30 as shown in FIG. 4, and in the outdoor fan motor driving means 110. In response to the control signal output from the control means 104, as shown in FIG. 4, the outdoor fan 41 is stopped (off).

If operation continues in this state, the room temperature Tr gradually rises, so in step S11, it is determined whether the room temperature Tr is above the set temperature Ts + 0.5 ° C, and the room temperature Tr is the set temperature Ts. If it is not + 0.5 ° C or more (NO), the flow returns to step S10, and the operation of step S10 or less is repeated while the compressor 30 and the outdoor fan 41 are turned off.

As a result of the discrimination in step S11, when the indoor temperature Tr is set temperature Ts + 0.5 ° C or more (YES), the process proceeds to step S12, where the control means 104 includes the compressor driving means 108 and the outdoor fan motor. As shown in FIG. 4, the driving unit 110 is controlled to turn on the compressor 109 and to turn on the outdoor fan 41.

Subsequently, in step S13, when the operation key of the operation operation means 102 is turned off, it is determined whether the operation stop signal is input to the control means 104 from the operation operation means 102, and the operation stop signal is not input (NO In this case, the process returns to the step S8 to repeat the operation of the step S8 or less.

As a result of the discrimination in step S13, when the operation stop signal is input (YES), the control means 104 proceeds to the compressor driving means 108, the outdoor fan motor driving means 110 and the indoor fan motor. The driving means 112 is controlled to terminate the operation while turning off the compressor 30, the outdoor fan 41, and the indoor fan 61.

As described above, according to the compressor control apparatus and method of the air conditioner according to the present invention, if the compressor on time is countered and the compressor temperature is less than the predetermined time, the compressor after the predetermined time without turning off the compressor even if the indoor temperature reaches the set temperature. By turning off the compressor to stabilize the cycle on the compressor, it is effective to increase the comfort by smoothing the air flow in the room.

Claims (4)

In the air conditioner provided with an outdoor fan for circulating the refrigerant by circulating the refrigerant in the order of a compressor, an outdoor heat exchanger, a capillary tube and an indoor heat exchanger, and circulates the outdoor air for heat exchange in the outdoor heat exchanger, Operation operation means for inputting a set temperature; Indoor temperature sensing means for detecting the indoor temperature, When the on time of the compressor is countered and the compressor on time has passed the minimum operation time, the indoor temperature detected by the indoor temperature sensing means and the set temperature input by the operating operation means are compared to determine the temperature of the compressor and the outdoor fan. Control means for controlling driving; Compressor control device of the air conditioner, characterized in that the drive means for driving the compressor and the outdoor fan in accordance with the control signal from the control means. The method of claim 1, And the control means controls off the compressor and the outdoor fan when the indoor temperature sensed by the indoor temperature sensing means is less than or equal to a set temperature input by the driving operation means. The method of claim 1, The control means controls the compressor of the air conditioner if the indoor temperature sensed by the indoor temperature detecting means is a predetermined temperature or more than a predetermined temperature input by the operation manipulation means. Device. In the method of operating an air conditioner in which the refrigerant is circulated in the order of a compressor, an outdoor heat exchanger, a capillary tube, and an indoor heat exchanger to perform cooling operation, and circulate outdoor air by an outdoor fan so that heat exchange is performed in the outdoor heat exchanger. A set temperature input step of inputting a set temperature; An indoor temperature sensing step of detecting an indoor temperature; An outdoor temperature step of turning on the compressor and the outdoor fan when the indoor temperature detected in the indoor temperature detection step is greater than the set temperature input in the set temperature input step; A time discrimination step of determining whether the compressor on time has passed the minimum operation time by counting the on time of the compressor; A temperature discriminating step of comparing and determining a room temperature and a set temperature when the compressor on-time has passed the minimum operation time in the time discriminating step; In the temperature discriminating step, when the indoor temperature is lower than the set temperature, the compressor and the outdoor fan are turned off. When the indoor temperature is above a predetermined temperature, the outdoor unit control step is performed. Compressor control method.