KR0136072Y1 - Compressor operating control circuit of an airconditioner - Google Patents

Abstract

The present invention relates to a compressor drive control circuit of an air conditioner, and more particularly, a compressor (10) having one compressor (10) and a plurality of evaporators (18, 19) connected in parallel to the compressor (10). In the air conditioner for heating and cooling a plurality of rooms by driving of the compressor, the input signal unit 20 (21), the input from the input signal unit 20, 21 receiving the drive of the compressor 10, the compressor from When the drive signal of (10) is input, the compressor driving unit 26 for immediately driving the compressor immediately without time delay in case of initial driving according to the initial driving of the compressor, and driving the compressor after a predetermined time has elapsed if not the initial driving. Characterized in that provided.

Description

Compressor drive control circuit of air conditioner

1 is a refrigeration cycle diagram of a general air conditioner having a plurality of evaporators.

2 is a drive block diagram of an air conditioner according to the present invention.

3 is a detailed circuit diagram of a compressor drive control circuit of an air conditioner according to the present invention.

4 is a flowchart showing a compressor driving control method of an air conditioner according to the present invention.

* Explanation of symbols for main parts of the drawings

10 compressor 11 condenser

12: main valve 13: main capillary

14: first auxiliary valve 15: second auxiliary valve

16: capillary 1 17: capillary 2

18: first evaporator 19: second evaporator

20: Room A input unit 21: Room B input unit

22: A, B chamber detection unit 23: 1st auxiliary valve drive unit

24: second auxiliary valve driving unit 25: main valve driving unit

26: compressor drive unit

The present invention relates to a compressor drive control circuit of an air conditioner, and more particularly, to a compressor drive control circuit in an air conditioner having a plurality of evaporators and one compressor.

As is well known, the refrigeration cycle is composed of a compressor, a condenser, a capillary tube, and an evaporator and a refrigerant tube connected in series. The refrigerant flowing in the refrigerant tube undergoes a phase change such as compression, condensation, depressurization, and evaporation. It absorbs and releases heat from the air to perform cooling or heating. In general, the outdoor unit having a compressor installed at the outdoor side and compressing the refrigerant at high temperature and high pressure, and a condenser for exchanging the high temperature and high pressure refrigerant of the compressor with outdoor air, and the refrigerant at room temperature passing through the condenser at a low temperature. A capillary tube which depressurizes in an easy-to-evaporate state and an indoor unit having an evaporator which takes away heat from the high temperature of the room and evaporates the refrigerant depressurized by the capillary tube are divided into separate type and integral type air conditioners installed separately.

This configuration is composed of one indoor unit and one outdoor unit, but in recent years, the use of air conditioners has become common, and in homes, large stores, and companies, separate and integrated air conditioners are provided to cool and heat indoor spaces. Each floor or each space was needed. Due to this trend, an air conditioner, so-called multi-air conditioner, which controls a plurality of indoor units by one outdoor unit, has been proposed, and a cooling cycle of such an air conditioner is shown in FIG.

As shown in FIG. 1, a compressor for compressing a refrigerant at high temperature and high pressure, a condenser 11 for exchanging the high temperature and high pressure refrigerant with outdoor air, and a refrigerant heat exchanged by the condenser 11 are evaporated. A first evaporator 18 and a second evaporator respectively connected to the first capillary tube 16 and the second capillary tube 17, and the first and second capillary tubes 16 and 17, respectively, to reduce the pressure in a prone state. 19 and a first installed at the front end of the first and second capillary tubes 16 and 17, respectively, to intercept the inflow of the refrigerant from the condenser 11 to the first and second capillary tubes 16 and 17, respectively. And a second auxiliary valve 14, 15, and a main valve 12 and a main capillary 13 connected in parallel to each other to control the outflow of the refrigerant from the condenser 11 when the auxiliary valves 14 and 15 are opened. It is provided.

The operation of the multi-air conditioner according to the above-described configuration will be described below. A case where the first evaporator 18 is installed in the room A and the second evaporator 19 is installed in the room B will be described as an example. First, if only one chamber in room A and room B requires heating / cooling operation, only the auxiliary valve connected to the evaporator of the chamber requiring cooling / heating operation is opened, and both auxiliary valves when both chambers require cooling / heating operation. Will be all open. In addition, when only one auxiliary valve, for example, the first auxiliary valve 14 is opened, the main valve 12 is opened so that the high pressure refrigerant passing through the condenser 11 from the compressor 10 is removed from the main capillary tube C13. After the pressure is reduced by the first capillary tube 16 without passing through the first evaporator 18, the indoor air is cooled. On the other hand, when both the auxiliary valves are open, the main valve 12 is closed, and the refrigerant passing through the condenser is firstly decompressed through the main capillary tube 13, and then flows into each capillary tube and is decompressed secondly. Heat exchange with the air in the room through the evaporator.

In addition, when both chambers do not require heating and cooling operation, both the main valve and the first and second auxiliary valves are turned off and the driving of the compressor is stopped.

However, in the conventional air conditioner, when the initial driving power is applied to the compressor, the compressor is driven after a delay time of a predetermined time, which is unnecessary at the time of initial driving of the compressor. It did not meet the needs of

Accordingly, it is an object of the present invention to provide a compressor drive control circuit of an air conditioner that is capable of driving a compressor immediately without time delay during initial startup of the compressor.

In addition, another object of the present invention is to provide a compressor drive control circuit of an air conditioner that is capable of protecting the compressor by a predetermined time delay when restarting the compressor after stopping the operation.

In order to achieve the above object, the compressor drive control circuit of the air conditioner according to the present invention includes one compressor and a plurality of evaporators connected in parallel to the compressor to air-condition a plurality of rooms by driving a compressor. In this case, the input signal unit for receiving the operation of the compressor, if the drive signal of the compressor is input from the input signal unit in the case of the initial drive according to the initial operation of the compressor in the initial drive immediately without time delay, the initial drive Otherwise it characterized in that it comprises a compressor driving unit for driving the compressor after a predetermined time elapses.

Hereinafter will be described in detail the configuration and effect according to a preferred embodiment of the present invention.

As shown in FIG. 1, an air conditioner according to the present invention includes a compressor for compressing a refrigerant at high temperature and high pressure, a condenser 11 for exchanging the refrigerant at high temperature and high pressure with outdoor air, and the condenser 11. The first evaporator 18 connected to the first capillary tube 16 and the second capillary tube 17, respectively, and the first and second capillary tubes 16 and 17, respectively, to depressurize the refrigerant heat exchanged by the vaporized state. And the second evaporator 19 and the front end of the first and second capillary tubes 16 and 17, respectively, and the refrigerant from the condenser 11 to the first and second capillary tubes 16 and 17. First and second auxiliary valves 14 and 15 for intermittent inflow, and main valves 12 connected in parallel to each other to control the outflow of refrigerant from the condenser 11 upon opening of the auxiliary valves 14 and 15. ) And the main capillary tube 13.

In addition, Figure 2 shows a control block diagram of the air conditioner according to the present invention, which is a room A input unit 20 for receiving a drive signal of the indoor unit provided in the room A from the user, and the drive signal of the indoor unit provided in the room B Room A and B sensing unit which detects a room requiring heating and cooling by driving signals from the room B input unit 21 and the A and B room input units 20 and 21 that receive the input signal, and outputs a predetermined control signal. The control unit 22 and the main valve driver 25 for opening and closing the main valve 12 by receiving a control signal from the A and B chamber sensing units 22 and the control signals of the A and B chamber sensing units 22. Compressor driving section 26 for controlling the drive of the compressor 10 by means, a first auxiliary valve driving section 23 for opening the first auxiliary valve 14 when the drive signal is input from the chamber A input section 20, B The second auxiliary valve driver 14 is provided to open the second auxiliary valve 15 when the driving signal is input from the real input unit 21. .

In the above configuration, the compressor driver 26 has a circuit configuration as shown in FIG. 3, which is a transistor that is turned on by a control signal output from the A and B chamber sensing units 22 ( Q1), a transistor Q2 that receives a base signal from the collector terminal of the transistor Q1, a transistor Q3 having an emitter terminal connected to the collector terminal of the transistor Q2, and a base signal supplied to the transistor Q3. A transistor Q4 having an emitter terminal connected thereto, a transistor Q5 that receives a base signal from a collector terminal of the transistor Q3, and a collector terminal of the transistor Q5 connected to a base terminal of the transistor Q4. An anode side is connected to the resistor R14 and the collector terminal of the transistor Q5, and the cathode side is an inverted signal from an intermediate tap of the diode D1, the diode D1, and the capacitor C1 connected to the capacitor C1. A comparator IC2 connected to the base terminal of the transistor Q4 via a resistor R15, the output terminal of which receives the input voltage divided by the divided resistors R18 and R17 as a non-inverting signal; A transistor Q6 is provided which receives the base signal from the collector terminal of Q5) and conducts the relay RY1 connected to the collector terminal.

The operation of the compressor drive control circuit of the air conditioner according to the present invention having such a configuration will be described with reference to the flowchart shown in FIG. 4 and the circuit diagram of FIG. First, when a driving signal of the compressor is input to the room A input unit 20 and the room B input unit 21 by the user, the A and B room detection units 22 output the compressor drive signal to the compressor driver 26. . That is, the A and B room detection unit 22 outputs a low signal to one output terminal when it is determined that at least one of the two rooms needs the cooling and heating operation. Thus, transistor Q1 is turned off, and thereby transistor Q2 is turned on. In this case, when the initial power is applied to the compressor, since the capacitor C1 connected to the inverting terminal of the comparator IC2 does not have a charged voltage, the comparator IC2 outputs a high signal. Thus, transistor Q4 is turned on, thereby turning on transistors Q3 and Q2.

In addition, as the transistor Q3 is turned on, the transistor Q5 receiving the driving signal from the collector terminal thereof is turned off. Therefore, since the transistor Q6 is turned on to drive the relay RY1 connected to the collector end thereof, when the initial drive power is applied, the drive power is immediately applied to the compressor without a predetermined time delay.

However, the capacitor C1 is charged by the diode D1 connected to the collector terminal from the time when the transistor Q5 is turned off, and the inverting of the comparator IC2 is inverted when the charging of the capacitor C1 is completed at a certain time. Since the input voltage of the terminal is greater than the divided voltage of the non-inverting terminal, the comparator IC2 outputs a low signal. However, since the potential of the transistor Q5 is already turned off by the resistor R14 and the resistor R15 at the base terminal of the transistor Q4, the relay RY1 is continuously driven to drive the compressor. .

On the other hand, if the compressor is to be driven again within a predetermined time after the compressor is stopped, a low signal is output from the chambers A and B. The transistor Q1 is turned on and the transistor Q2 is warmed. It is a state. At this time, the capacitor C1 connected to the inverting terminal of the comparator IC2 starts discharging from the moment when the operation of the compressor is stopped in the state where the charging is completed, so that the input voltage of the inverting terminal is larger than the divided voltage of the non-inverting terminal of the comparator IC2. Until this time, the comparator IC2 outputs a low signal. Therefore, the transistors Q3 and Q4 are turned off and the transistor Q5 is turned on, so that the drive of the relay RY1 is turned off.

That is, the capacitor C1 is discharged from the time when the driving of the compressor is stopped, and the comparator IC2 outputs a low signal until the voltage charged while driving the compressor becomes lower than the divided voltage of the non-inverting terminal. Is not driven. Therefore, since the transistors Q2, Q3 and Q4 are turned on at the same time and the transistor Q5 is turned off from the moment when the output of the comparator IC2 becomes high, the relay RY1 is driven so that the compressor starts operation. .

Based on the circuit configuration, the operation control method of the air conditioner according to the present invention will be described with reference to the flowchart shown in FIG. First, when the heating and cooling operation is selected through the room A input unit 20 and the room B input unit 21 in step (s10), it is necessary to select the air conditioning operation and the heating and cooling operation through the room A and B detection units 22. You will sense the thread. In step (s11), the indoor air is introduced into the indoor unit installed in each chamber by driving the indoor fan according to the heating and cooling operation. In step s12, if the desired temperature is equal to or less than the present temperature (in the case of cooling operation), the desired temperature of the room input from the user in step s10 is compared with the present temperature detected by the predetermined temperature sensor. Will proceed. At this time (s13) it is determined whether the initial power is applied, if the initial power is applied proceeds to step (s15) to immediately drive the compressor 10 without a predetermined delay time to the heat exchange between the evaporator and the room air The air cooled by the air is discharged directly into the room. If the initial power is not applied as a result of the determination of the step s13, the process proceeds to the step s14, and after the predetermined time has elapsed, the compressor is continuously restarted. Operation can be prevented from shortening the life of the compressor. The predetermined delay time is determined by the discharge time of the capacitor C1 connected to the inverting terminal side of the comparator IC2.

As described above, when the initial power is applied to the compressor by the compressor drive control circuit of the air conditioner according to the present invention, the compressor is immediately driven without a predetermined delay time, thereby preventing unnecessary delays in the operation of the compressor. The cold air is discharged immediately after the input to satisfy the user's demand.

Claims (1)

In the air conditioner having a compressor 10 and a plurality of evaporators 18, 19 connected in parallel to the compressor 10 to cool and heat a plurality of rooms by driving the compressor 10, the compressor Room A input unit B and room B input unit 20 and 21 which receive input of driving of 10; A and B room detectors 22 for detecting a room requiring cooling and heating by driving signals from the room A input unit 20 and the room B input unit 21 and outputting a control signal; When a signal for driving the compressor 10 is input from the chamber A input unit and the chamber B input unit 20 and 21, the compressor 10 receives a control signal from the chamber A and chamber detectors 22. When the initial drive is the initial drive as well as driving the compressor (10) as well as not the initial drive if the delay time determined by the discharge time of the capacitor after the elapse of the compressor 10, the A When the signal for driving the compressor 10 is input from the chamber B sensing unit 22, the resistor R8 is applied to the third transistor Q3 and the base terminal of the third transistor Q3. A fourth transistor Q4 having its emitter terminal connected thereto and a fifth transistor Q5 having its base terminal connected to a collector terminal of the third transistor Q3 so that the emitter terminal is turned off upon input of a drive signal of the compressor 10; ) And a bay at the collector terminal of the fifth transistor Q5. A sixth transistor Q6 having a terminal connected thereto and a collector terminal of the sixth transistor Q6 so that the compressor 10 can be turned on / off in accordance with the on / off operation of the sixth transistor Q6. The diode D1 is connected to the collector terminal of the fifth transistor Q5 so that it is charged during driving of the compressor 10 and discharged during non-driving according to the connected relay RY1 and the on / off operation of the relay RY1. And a non-inverting input terminal connected to the intermediate tap of the capacitor C1 and the diode D1 and an inverting input terminal thereof connected through the capacitor C1 and the inverting input terminal of the voltage divider resistor R17 and R18. And a compressor driving unit (26) having a comparator (IC2) connected to the base terminal of the transistor (Q4) and having an output terminal connected to the base terminal of the transistor (Q4).