KR20060018663A - A multi air conditioner system control method of compressor - Google Patents

Abstract

The present invention relates to a compressor control method of a multi-air conditioner system, and an object of the present invention is to provide a compressor control method of a multi-air conditioner system that can prevent the performance degradation of the air conditioner due to the startup delay time of the compressor.

To this end, the present invention is a compressor control method of a multi-air conditioner system having an outdoor unit having a plurality of compressors and a plurality of indoor units connected in parallel to the outdoor unit, the operation target compressor after the start delay time after the operation stops of the plurality of compressors Search for and start driving.

The compressor to be operated may be determined by setting the starting priority of the plurality of compressors and searching the plurality of compressors according to the starting priority.

Description

A multi air conditioner system control method of compressor

1 is a flowchart illustrating a compressor control method of a conventional multi-air conditioner system.

2 is a graph showing a compressor operating state of the multi-air conditioner system shown in FIG.

3 is a refrigerant flow diagram illustrating a multi-air conditioner system according to an exemplary embodiment of the present invention.

4 is a block diagram illustrating components of the multi-air conditioner system illustrated in FIG. 3.

5 is a flowchart illustrating a compressor control method of the multi-air conditioner system illustrated in FIG. 3.

Explanation of symbols on the main parts of the drawings

10: outdoor unit

11: compressor

13: outdoor heat exchanger

19: outdoor unit microcomputer

20: indoor unit

21: indoor heat exchanger

24: indoor unit microcomputer

The present invention relates to a compressor control method of a multi-air conditioner system, and more particularly, to a compressor control method of a multi-air conditioner system that can prevent the performance degradation due to the start-up delay of the compressor.

In general, the multi-air conditioner system includes at least one outdoor unit, a plurality of indoor units connected to the at least one outdoor unit, and a central controller for inputting a command for controlling the plurality of indoor units. In addition, an outdoor unit and an indoor unit microcomputer are provided in the outdoor unit and the plurality of indoor units, and a repeater for interfacing between the central controller and the outdoor unit microcomputer is provided.

The outdoor unit of the multi-air conditioner system includes a plurality of compressors, and the number of compressors installed varies according to the characteristics of the system, and the capacity of each compressor is the same or different. The compressor required for operation is determined according to the operating state of the indoor unit among the plurality of compressors.

In the conventional multi-air conditioner system, as shown in FIG. 1, when a user inputs a signal for operating the multi-air conditioner system, the microcomputer determines whether a start signal is input. The microcomputer determines the compressor required for operation among the plurality of compressors according to the operating state of the indoor unit. (S20)

When the compressor necessary for operation is determined, it is determined whether the corresponding compressor is in an operation stop state, and if the compressor is currently operating, the operation is continued as it is (S30).

If the compressor required for operation is in operation stop, it is determined whether the corresponding compressor has been delayed for 3 minutes. (S40) If the delay is not started after 3 minutes has elapsed, the operation of the compressor is started (S50). If it does not pass, the operation of the compressor is started by waiting until 3 minutes have elapsed. (S60) The compressor control method of the multi-air conditioner system is described in detail in Korean Patent Publication No. 10-362371.

However, such a conventional multi-air conditioner system can be operated only after the start delay time has elapsed even when the operation signal of the compressor is input as shown in FIG. There was a problem of this deterioration.

The present invention is to solve the above problems, an object of the present invention is to provide a compressor control method of a multi-air conditioner system that can prevent the performance degradation of the air conditioner due to the startup delay time of the compressor.

In order to achieve the above object, the present invention provides a compressor control method of a multi-air conditioner system having an outdoor unit having a plurality of compressors and a plurality of indoor units connected in parallel to the outdoor unit. It is characterized by starting the operation by searching for the elapsed operation target compressor.

The compressor to be operated may be determined by setting the starting priority of the plurality of compressors and searching the plurality of compressors according to the starting priority.

In addition, the compressor control method is characterized in that it is determined whether the start delay time after the operation stops the compressor of the next order when the compressor in the starting priority is the start delay after the operation stop.

In addition, the compressor control method is characterized in that the operation of the compressor is continued when the compressor in the starting priority is in operation.

The search of the compressor to be operated may be repeated until the compressor in operation reaches the compressor capacity required for operation or the search for the compressor having the lowest starting priority is completed.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

3 and 4, the multi-air conditioner system according to the exemplary embodiment of the present invention includes an outdoor unit 10 and a plurality of indoor units 20 connected to the outdoor unit 10. As shown in FIG.

The outdoor unit 10 delivers a plurality of compressors 11 for compressing a refrigerant, a four-way valve 12 for adjusting a flow direction of the refrigerant discharged from each compressor 11, and a refrigerant compressed by each compressor 11. And an outdoor heat exchanger 13 for exchanging heat with the outside air, an outdoor fan 14 forcibly blown by the outdoor heat exchanger 13, and an outdoor fan motor 15 for rotating the outdoor fan 14.

In addition, the outdoor unit 10 is closed in the cooling operation and is installed in parallel with the outdoor electric valve 16 to expand the refrigerant by adjusting the opening degree during the heating operation, and the outdoor electric valve 16 in parallel to bypass the refrigerant only during the cooling operation. A check valve 17 to control the accumulator, an accumulator 18 for delivering refrigerant to the compressor in a gas state, and an outdoor unit microcomputer 19 for controlling devices of the outdoor unit 10 and performing data communication with the indoor unit microcomputer 24. Include.

On the other hand, the indoor unit 20 is an indoor heat exchanger 21 in which heat exchange is performed after indoor air is sucked, and indoor air is sucked from the outside of the indoor unit 20 and passes through the indoor heat exchanger 21, and then again the indoor unit ( The indoor fan 22 to discharge to the outside of the 20, the indoor fan motor 23 for rotating the indoor fan 22 and the respective devices of the indoor unit 20 are controlled and data communication is performed with the outdoor unit microcomputer 19. The indoor unit microcomputer 24 is included.

In addition, in the pipe connected to the indoor heat exchanger 21, a pipe in which the refrigerant is sucked during the cooling operation is installed with an indoor electric valve 25 for expanding the refrigerant, and the refrigerant discharged from the indoor heat exchanger 21 flows during the cooling operation. In the piping, when a failure occurs in the indoor unit 20 itself or a communication error occurs between the indoor unit 20 and the outdoor unit 10, the refrigerant flowing through the indoor heat exchanger 21 automatically or by a control command of the indoor unit microcomputer 24. Refrigerant control valve 26 to regulate the flow of the is installed.

3 and 4, two or more compressors may be connected to one outdoor unit or two or more outdoor units may be connected in parallel.

A compressor control method in the multi-air conditioner system shown in FIGS. 3 and 4 will be described with reference to FIG. For example, the compressor 11 constituting the multi-air conditioner system has a total of four compressors 11 having the same capacity, and the capacity A of the compressor 11 required for operation corresponds to two compressors 11. The control method in case of a capacity is demonstrated.

 The indoor unit microcomputer 24 determines whether there is an indoor unit 20 to which a start signal is input, among the plurality of indoor units 20 (S100).

When there is an indoor unit 20 to which a start signal is input, the indoor unit microcomputer 24 outputs a start signal to the outdoor unit microcomputer 19. The outdoor unit microcomputer 19 determines the starting priority N of the four compressors 11. Starting priority (N) of the compressor 11 is determined in consideration of the compressor 11 to be operated first according to the capacity and product specifications of each compressor 11, and stored in the outdoor unit microcomputer (19). S110)

The outdoor unit microcomputer 19 calculates the capacity (A = 50%) of the compressor 11 necessary for operation in consideration of the number of the indoor unit 20 to which the start signal is input and the cooling and heating capacity.

The initial outdoor unit microcomputer 19 starts searching from the compressor 11 whose starting priority is N = 1, and the current operating capacity is stored as 0%.

The outdoor unit microcomputer 19 determines whether the compressor 11 whose starting priority is the first priority is being stopped. (S140) When the first compressor 11 is stopped, the first priority compressor 11 is stopped for 3 minutes. It is determined whether or not the start delay time has elapsed (S150). If the priority compressor 11 is not in the start delay time, the operation of the first priority compressor 11 is started. The operation unit (0%) is added to the capacity (25%) of the first-order compressor 11 and stored in the outdoor unit microcomputer 19 (S170).

In addition, it is determined whether the operation capacity (25%) is equal to the operation capacity (A = 50%) of the compressor 11 required for operation, or whether the operation of the fourth-ranking compressor 11 is determined. Is 25%, and the operation of the first-order compressor 11 is determined, and thus, 1 is added to the starting priority (N = 1), changed to N = 2, and the process returns to step 140 (S190).

In operation 140, it is determined whether the second-rank compressor 11 is in the operation stop state. (S140) When the second-rank compressor 11 is in the stopped state, the second-rank compressor 11 is delayed for three minutes. (S150) If the second priority compressor 11 is in the start delay state, it is not waited until the start delay time of the second rank compressor 11 has elapsed. Add to set N = 3 and return to step 140 (S190).

In step 140, it is determined whether the third-rank compressor 11 is in the operation stop state. (S140) If the third-rank compressor 11 is in the stopped state, the third-rank compressor 11 is delayed for three minutes. It is determined whether or not the state is in the state (S150). If it is determined that the third-rank compressor 11 is not in the starting delay state, the operation of the third-rank compressor 11 is started (S160). %) Plus the third-rank compressor 11 capacity (25%) is stored in the outdoor unit microcomputer 19 as a new operating capacity (50%) (S170).

The outdoor unit microcomputer 19 determines whether the driving capacity is equal to A = 50% or N = 4. (S180) As a result of the determination, the driving capacity of the compressor 11 required for operation is 50%. Since it is the same as A), the 1st and 3rd priority compressors 11 currently operating are operated as it is, and the determination of whether the plurality of compressors 11 are operated is terminated.

In operation 140, when the N-rank compressor 11 is not in operation, that is, in the current operation state, the N-level compressor 11 continues to operate without determining whether the start delay is delayed and stored in the outdoor unit microcomputer 19. After storing the capacity plus the operating capacity of the N-rank compressor 11 as a new operating capacity (S170), the process proceeds to step 180.

In this way, when there are compressors (N = 2) 11 in which the start delay time has not elapsed among the plurality of compressors 11, the next priority compressor (N = 3) is not waited until the start delay time has elapsed. (11) If the start delay time has elapsed and operation is possible, the next priority compressor (N = 3) 11 is operated.

As described in detail above, in the present invention, when the starting delay time does not pass after the compressor is stopped, other compressors in a state capable of operating are combined and replaced by the capacity of the compressor necessary for the operation. The performance deterioration for a certain time can be prevented.

Claims (5)

In the compressor control method of a multi-air conditioner system having an outdoor unit having a plurality of compressors, and a plurality of indoor units connected to the outdoor unit, The compressor control method of the multi-air conditioner system to start the operation by searching for the operation target compressor after the start delay time after the operation stop of the plurality of compressors. The method of claim 1, The compressor to be operated is the compressor control method of the multi-air conditioner system, characterized in that the setting of the starting priority of the plurality of compressors, and determined by searching for the plurality of compressors in accordance with the starting priority. The method of claim 2, The compressor control method may be configured to determine whether a start delay time after the stop of the compressor of the next rank has elapsed when the compressor having the start priority is delayed after stopping the operation. Control method. The method of claim 2, The compressor control method is a compressor control method of a multi-air conditioner system, characterized in that to continue the operation of the compressor when the compressor in the starting priority. The method of claim 2,  The search of the compressor to be operated is repeated until the compressor in operation reaches the compressor capacity required for operation or the search for the compressor having the lowest starting priority is repeated.

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