KR101544037B1 - System and method for controlling driving of an air compressor for saving energy - Google Patents

System and method for controlling driving of an air compressor for saving energy Download PDF

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Publication number
KR101544037B1
KR101544037B1 KR1020140184478A KR20140184478A KR101544037B1 KR 101544037 B1 KR101544037 B1 KR 101544037B1 KR 1020140184478 A KR1020140184478 A KR 1020140184478A KR 20140184478 A KR20140184478 A KR 20140184478A KR 101544037 B1 KR101544037 B1 KR 101544037B1
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South Korea
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compressor
zone
control
time
unit
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KR1020140184478A
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Korean (ko)
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이정훈
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주식회사 건영기계
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Priority to KR1020140184478A priority Critical patent/KR101544037B1/en
Application granted granted Critical
Publication of KR101544037B1 publication Critical patent/KR101544037B1/en
Priority to PCT/KR2015/009292 priority patent/WO2016098998A1/en
Priority to CN201580001403.0A priority patent/CN106460846B/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
    • F04C28/28—Safety arrangements; Monitoring

Abstract

The present invention relates to a system and a method for controlling the operation of a compressor for saving energy, wherein a PID pressure control method and an on/off control method are selected appropriately depending on a change in air demand in an actual environment by monitoring the real-time operation condition of the compressor and analyzing recorded operation data. For the purpose, the present invention provides a system for controlling the operation of a compressor for saving energy, wherein the operation controlling system comprises: a compressor part for supplying compressed air; a controller part for controlling the operation of the compressor; and a monitoring part for collecting and recording electric power consumption and a load rate depending on the real-time operation condition of the compressor. The system for controlling the operation of a compressor for saving energy comprises: a multifunctional control part for controlling a controller part to extract an interval capable of on/off control based on the load rate depending on air demand in an actual environment from the recorded operation data of the monitoring part, display the interval through a monitoring screen and enable a manager to select an interval capable of on/off control for each day of the week and each time slot so that the operation control method of the compressor can be automatically converted into the on/off control method in a corresponding set interval. Power waste can be minimized and the efficiency of saving energy can be maximized as unnecessary operation of the compressor is reduced by actively operating the compressor using the PID pressure control method and the on/off control method depending on a change in air demand in an actual environment during the operation of the compressor.

Description

TECHNICAL FIELD [0001] The present invention relates to a compressor operation control system and method for energy saving,

The present invention relates to a system and method for operating a compressor for energy saving. More particularly, the present invention relates to a system and method for controlling operation of a compressor for monitoring and recording a real-time operation status (power consumption status and load ratio) of a compressor through a sensor installed in the compressor, (On / off) control of the compressor according to loading (load operation) / unloading (no-load operation) is displayed and displayed as a monitoring screen together with the real-time operation status information of the compressor, Speed control method for the compressor in the corresponding section, and then sets the proportional integral differential (PID) control method and the multi-step speed control method according to the schedule information set in the compressor operation, So that the compressor can be operated. Thus, And more particularly, to a compressor operation control system and method for energy saving that can effectively improve the energy saving efficiency.

Generally, a compressor is a mechanical device that compresses gas or liquid to increase pressure and speed, and includes a compressor that compresses air to operate an air cylinder to drive an automation device or to operate all pneumatic devices, Refrigeration, refrigerator and air conditioner compressors used for condensation and liquefaction. A compression method using a reciprocating motion of a cylinder and a piston, and a compression method using a rotary motion of a screw.

Compressors using double screw type adopt the operation method by Y-Δ start method and pressure control method. The operation method of the screw compressor operated by the Y-? Start method is as follows. At the same time as the motor is driven, the suction valve is opened to suck the air to generate compressed air, and the generated compressed air is supplied to the receiving tank.

When the pressure in the receiving tank exceeds the set upper limit by the load operation, the suction valve is closed by the electric control signal, the generation of the compressed air is stopped, and the idling of the motor is performed. Unloaded operation that does not generate compressed air consumes about 40-60% of electric power compared with the load operation (this differs slightly depending on the equipment horsepower and air-end maker), so that even when the motor is idling, Is consumed.

In addition, the operation method of the screw compressor operated by the Y-Δ start method is advantageous when operating the workplace or the facility having the air demand of more than 85%, but when the air demand of 85% or less is expected, There is a problem with power consumption.

On the other hand, another method of operating the screw compressor is a PID (proportional, integral, differential pressure) pressure control method that can compensate for the disadvantage of the Y-delta starting method. In this PID pressure control method, the PID controller calculates the demanded amount of compressed air at present and controls the motor at the optimum number of revolutions to generate compressed air. Therefore, there is an advantage that the no-load operation time is minimized to prevent a considerable loss of start-up power accompanying the restart of the motor, and the loss of electric energy due to the low-speed control of the motor can be minimized.

However, when controlling the motor in consideration of the pressure value of the compressed air set according to the air demand, the PID pressure control method is difficult to control at a low rate at a considerable rate in the case of a compressor using a large motor, To 90%, and in the remaining cases it can lead to mechanical failure as well as significant energy loss. Furthermore, if a large motor installed in a screw compressor is controlled at an excessively low speed, vibration and resonance may occur due to the characteristics of the large motor, which may cause fatal defects to the adjacent components as well as the motor. So that it is exposed to the limit of low speed control of the motor.

As one of the remedies for the above problems, another operation method developed by the Company is an on / off control method. This is a method of preventing power loss by stopping idling of the motor at no-load operation in which the generation of compressed air is excluded.

However, since the multi-speed control system stops the operation of the motor at the time of no-load operation, when the motor is restarted by the load operation, considerable starting power is required for restarting. Therefore, only when the non- In the case of a short idle time compared to the load operation, the air demand is reduced by about 50% due to the low efficiency because the restart rate is high and the power consumption is high. Therefore, even if the soft start through the inverter is taken into consideration, It is possible to apply it only to a workplace or a facility of less than a certain level.

In this regard, the prior arts developed by the Company are disclosed in Korean Patent No. 10-0908022 (published on August 22, 2001), Japanese Patent Application No. 10-1064538 (published on Aug. 22, 2001), Japanese Patent Application No. 10-1320669 2001), and 10-1327420 (published on Aug. 22, 2001) are known.

Patent No. 10-0908022 "Screw compressor control method and apparatus" Patent No. 10-1064538 "Intelligent Compressor System" Patent No. 10-1320669 entitled "Screw Compressor Control Method" Patent No. 10-1327420 entitled "Air Compressor System Incorporating an Inverter and Its Control Method"

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in an effort to solve the above problems, and it is an object of the present invention to provide a method and system for analyzing operating record data of a compressor, (On / off) control of the compressor according to the load operation (load operation) / unloading (no-load operation) In order to reduce the unnecessary operation of the compressor through the PID pressure control method and the appropriate selection time setting and control of the multi-speed control method according to the variation of the air demand in the actual environment during the compressor operation and the active operation of the compressor By maximizing energy saving efficiency by minimizing power waste And to provide a compressor operation control system and method for energy saving.

In order to achieve the above object, according to one embodiment of the present invention, there is provided a compressor comprising: a compressor section for providing compressed air; a controller section for controlling the operation of the compressor section; And a monitoring unit for collecting and recording the operation history data, wherein the operation history data recorded by the monitoring unit is analyzed to control the load ratio based on the day of the week and the demand of air for the energy saving in the actual environment It is possible to control multiple intermittent speeds by day of week and time zone selected by the administrator on the monitoring screen by providing a monitoring screen, and setting the multi-speed control section of the compressor according to the day of the week and the time zone for energy saving, Driver A driving control system of the compressor for a multi-energy savings which comprises a multi-function combined controller for controlling the controller unit to automatically switch to the intermittent controlled manner.

According to another aspect of the present invention, there is provided a compressor comprising: a compressor section for supplying compressed air; a controller section for controlling operation of the compressor section; And a multifunctional hybrid control unit for controlling a compressor operation mode of the controller unit based on a power amount and a load factor recorded by the monitoring unit, the method comprising the steps of: (a) (Loading / unloading ratio) of the compressor according to the day and time of the day from the operation record data of the monitoring part accumulated for a predetermined predetermined time beforehand, Multi-speed control based on load factor (B) whether or not the multi-speed control zone is already established, and whether the preset multi-speed control zone matches with the currently selected multi-zone controllable zone, A second step of providing a monitoring screen capable of setting a multi-speed control interval zone of the compressor based on the interval zone; (c) Through the monitoring screen, it is confirmed whether the multi-speed control zone zone is set for the day of the week and the time zone by the administrator, and the multi-zone speed control zone for each day and time zone selected by the administrator can be controlled by the day / (D) determining whether or not the multi-speed control zone set in the preset multi-speed control zone or the third zone has arrived and passed, and controlling the operation control mode of the compressor in the corresponding zone and controlling the controller unit to switch to the on / off control mode, and to control the controller unit to switch the operation control mode of the compressor to the PID control mode in a section other than the corresponding interval zone. Operation control method.

According to the present invention, by using the data of the driving recorder that monitors and records the real-time power consumption state and the load factor of the compressor, it is possible to extract a multi-speed on / off control possible interval necessary for energy saving in a real environment, The present invention has an advantage that the manager can guide the manager to set the multi-speed control zone easily by presenting the monitoring screen together with the real-time operation status information of the compressor so that the manager can refer to the setting of the multi-speed control zone. It is able to select and control the PID pressure control method and the multi-step speed control method actively according to the change of the air demand in the actual environment by automatically switching and controlling the operation control method of the compressor in the multi- To reduce the unnecessary operation of the compressor Digestion, and there is an effect that it is possible to maximize the energy-saving efficiency due to the loading of the compressor (load operation) / unloading (no-load operation).

1 is a block diagram illustrating a schematic configuration of a compressor operation control system for energy saving according to the present invention.
2 is a diagram illustrating a detailed configuration of the air compressor unit of FIG.
FIGS. 3A to 3C are graphs illustrating the usage status of power (kw / min) per minute visualized by the monitoring unit, the usage status of power (kw / hr) by time slot, and the load rate graph, respectively.
FIGS. 4A to 4C are test results of the power analysis test conducted to examine the average power consumption per each starting method for the compressors having nozzle diameters of φ4, φ5, and φ6, respectively, and the energy saving rate of the ON / OFF method.
5A and 5B are operation flowcharts illustrating the operation control method of the compressor for energy saving according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the overall configuration and operation of a compressor operation control system and method for energy saving according to the present invention will be described in detail with reference to the accompanying drawings.

It is to be understood that the words or words used in the present specification and claims are not to be construed in a conventional or dictionary sense and that the inventor can properly define the concept of a term in order to describe its invention in the best possible way And should be construed in light of the meanings and concepts consistent with the technical idea of the present invention. Therefore, it should be understood that the embodiments described herein and the configurations shown in the drawings are only the most preferred embodiments of the present invention, and that various equivalents and modifications may be substituted for them at the time of the present application shall.

FIG. 1 is a block diagram illustrating a schematic configuration of a compressor operation control system for energy saving according to the present invention, FIG. 2 is a diagram illustrating a detailed configuration of an air compressor unit of FIG. 1, (Kw / hr) usage status and time-scale power consumption (kw / hr) visualized by minute unit, kw / hr usage status, and load factor graphs. Figs. 4a to 4c are graphs As a test report of the power analysis test conducted to determine the average power consumption of each start method (BYPASS, PID, ON / OFF) and the energy saving rate of the ON / OFF method compared to the BYPASS method and the PID method, 2, the compressor operation control system of the present invention includes a compressor unit 10 for providing compressed air, a controller unit 20 for controlling the operation of the air compressor unit 10, a compressor unit 10 for controlling the operation of the compressor 10, One or more installed A monitoring unit 30 for collecting and recording the amount of power and the load ratio according to the real-time operation status of the compressor from the sensors, and a multifunctional hybrid control unit 40.

For example, a screw type compressor may be used as the compressor unit 10. [ However, the present invention is not limited thereto, and a compressor unit having various configurations and structures may be used. In this case, the configuration of the compressor unit described below may be changed.

2, the compressor unit 10 includes an air filter 11 for filtering foreign substances in the air, a capacity control valve 19 for interrupting the capacity of the compressor, a screw unit 13 for compressing air, A motor 12 for driving the screw unit, and a compressed air storage tank 18 for storing the compressed air. In addition, as shown in the drawing, an oil line 15 for providing oil for airtightness during air compression, a separator 14 for separating air and oil, and an air line 16 , And a cooling unit 17 for preparing for heat generated during air compression.

The air sucked through the air filter 11 and the capacity control valve 19 together with the operation of the motor 12 is compressed in the screw unit 13 and the compressed air is separated from the oil in the separator 14 And is sent to the compressed air storage tank 18 via the air line 16 and stored, and then the proper capacity is maintained. In the separator 14, oil is supplied during air compression of the screw unit 13 to form an oil film in the screw.

The controller unit 20 controls the motor 12 and the capacity control valve 19 of the compressor unit 10 to provide compressed air for maintenance of a specified capacity and reduction of energy consumption. The controller 20 can switch a compressor operation control system to a PID pressure control system or a multi-speed control system under the control of the multifunctional hybrid control unit 40 to start the compressor. But various types of circuit configurations and key input panels can be added.

The monitoring unit 30 includes a plurality of sensors 31a to 31f provided in the air compressor unit 10, a PLC 32 connected to the sensors 31a to 31f, And a processor 33 for measuring the pressure, temperature, flow rate, rotational speed, power consumption, and air leakage information of the compressor unit 10 based on the output data of the compressor units 31a to 31f, The monitoring unit 30 collects and records the amount of power and the load ratio according to the real-time operation status of the compressor from each of the sensors 31a to 31f of the compressor unit 10. At this time, the sensors 31a to 31f are connected to the capacity control valve 19 of the compressor unit 10 and connected to the pressure sensor 31a for detecting the pressure, the flow rate sensor 31b for detecting the flow rate, A speed meter 31c for detecting the rotational speed, a power meter 31d for detecting power consumption, a temperature sensor 31e for detecting temperature, and an air leak sensor 31f for detecting air leak.

The PLC 32 displays the connection status of each sensor and the input / output status of the sensor, and can change the connection setting with the sensor. The output data of each sensor is inputted and quantified and quantified in real time to be transmitted to the remote server So that each of the compressors in operation can be monitored in real time.

The processor 33 measures the pressure, temperature, flow rate, rotation speed, power consumption, and air leak information of the compressor unit according to the sensor output by the PLC, It is possible to transmit the digitized information to a server at a remote place in real time. To this end, the processor 33 comprises a communication interface capable of communicating via a wired, wireless Internet or mobile communication network, a local network, though not shown, and processing data of the processor, A memory for storing information on consumables such as a name of a consumable item such as a / P filter, an exchange date, information on the replacement time of the consumable item, manager registration information such as an administrator's name, ID, password and telephone number, And a timer for counting the replacement time of consumables from the replacement date information of the consumable information according to the information and outputting the count information to the processor.

The monitoring unit 30 having such a configuration is configured to numerically calculate the weekly power kwh of the compressor unit 10, the current power kwh, the load factor, the time, the running status, the pressure bar, the temperature c, It allows the administrator to easily see how much electricity the appliance uses and how much efficiency it has.

3A to 3C, the monitoring unit 30 can visualize and display the usage status (kw / min) of each minute unit, the usage status (kw / hr) So that the manager can more easily recognize the electricity consumption and the load factor of the equipment.

The multifunctional hybrid control unit 40 analyzes the operation record data recorded by the monitoring unit 30 and extracts a multistep controllable interval based on the load rate according to the day of the week and the amount of air required for the time required for energy saving in the actual environment, Screen, and it is possible to set the multi-speed control zone for each day of the week and the time zone that can be controlled by the administrator on the monitoring screen as the multi-speed control zone of the compressor by day of the week and the time zone for energy saving, And controls the controller unit 20 to automatically switch to the multi-speed control system.

For this, the multifunctional hybrid control unit 40 may include a data analysis and extraction unit 41 and a hybrid control unit 42.

The data analyzing and extracting unit 41 may be set for a predetermined predetermined time before the current time (a period in which analysis of the load factor of the equipment is possible, for example, in units of weeks or months, The accumulated amount of the operation record data of the monitoring unit 30 is inputted and the amount of power and the load ratio of the compressor are analyzed according to the day of the week and the time of day. From the analysis result, (On / off) controllable interval according to the schedule information, and presents the schedule information in the time zone in which the multi-speed (on / off) is possible through the monitoring screen. At this time, the data analyzing and extracting unit 41 analyzes the operation record data to determine whether the load operation ratio is less than 67%, that is, the ratio of the load operation / no-load operation to the no-load operation is equal to or less than 67% 6 or less is maintained for a predetermined period of time (for example, the time required for setting the multi-speed control zone). That is, the multi-speed controllable time zone information for setting the schedule to be extracted at this time can be provided in units of days, preferably OFF from 18:00 on Monday to 07:00 on Monday where high no-load operation ratio is high, OFF until 07:00, OFF from Tuesday 18:00 to Wednesday 07:00 OFF, Wednesday 18:00 to Thursday 07:00 OFF, Thursday 18:00 to Friday 07:00 OFF, Friday 18:00 to Saturday 07: OFF until 00, and so on.

The reason for the constraint on the use time of the multi-speed control method is as follows.

First, when the equipment is cyclically turned on / off repeatedly, there is a danger of burning and power consumption when accumulating the heat of the motor. Second, the vibration of the equipment may increase the premature failure of the air- Third, a solenoid valve (sol v / v) must be additionally attached to the minimum valve on the separator tank to discharge "Air" to the air in a short time. The reason for this is that when the pressure in the separate tank is high, that is, if there is residual "Air" pressure during the air discharge, the "air" will increase the starting load during restart, causing overload of the equipment or equipment failure. For companies with on / off control, it may be more efficient to add an existing Receive Tank to the front or rear of the air compressor. The reason for this is that more air is stored and the frequency of use of the equipment is further reduced.

The data information displayed on the monitoring screen may be weekly electric power (kwh), today's electric power (kwh), load rate, time, operation status, pressure (bar), temperature (° C), rpm and the like.

Here, the data analyzing and extracting unit 41 checks whether or not the multi-speed control period interval for energy saving is established, and whether the predetermined multi-speed control period interval matches the currently extracted multi-speed controllable interval period, When the preset multi-speed control interval period is not coincident with the currently selected multi-speed controllable interval period even if the control interval period is not set in advance or the multi-speed control period interval is set in advance, So that the manager can set or reset the operation control method of the compressor to the multi-step control mode using the proposed multi-speed control interval zone.

The composite control unit 42 confirms whether the multi-speed control zone zone is set for each day of the week and the time zone by using the information provided on the monitoring screen, and the multi-zone control zone for each day and time zone selected by the administrator is divided into day zones Speed control period of the compressor by time and by checking the arrival and elapse of the multi-speed control period zone of the compressor according to the day of the week and the time zone for energy saving, and by controlling the operation control method of the compressor in the inter- and controls the controller unit 20 to switch to the on / off control mode, thereby reducing the energy consumption of the compressor unit.

In the present embodiment, the multifunctional hybrid control unit 40 determines whether the ratio of the load ratio, i.e., loading: unloading exceeds 4: 6, that is, 5: 5, 6: 4, 7: 8: 1, and 9: 1, the compressor section (10) is controlled by the PID pressure control method. When the ratio of the no load operation is 4: 6 or less, that is, 3: 7, 2: Is controlled by the multi-step speed control method, so that energy can be efficiently saved. On the other hand, the Applicant has found that the average power consumption of each of the starting systems (BYPASS, PID, ON / OFF) for the compressors having nozzle diameters of φ4, φ5 and φ6 and the energy for the ON / OFF method The power analysis test was carried out to find out the reduction rate. The research institute is "korea testing certification", the name is "multi-function energy-saving system" The date is from November 30, 2014 to November 5 of the same year, and the report number is "2014-00273". The results of the power analysis test are as illustrated in FIGS. 4A to 4C, and Table 1 below shows power analysis charts according to the operation control method of the compressor according to the test results.

division Power consumption
(KWh) Reduction rate Remarks Nozzle aperture Starting method BYPASS% (%) PID% (%) φ4 BYPASS 16.22 -47.3 PID 11.01 32.1 ON / OFF 4.85 70 55.9 φ5 BYPASS 20.59 -30.09 PID 15.73 23.6 ON / OFF 7.81 62.0 51.0 φ6 BYPASS 21.69 -34.6 PID 16.03 25.7 ON / OFF 8.56 60.0 46.2

The compressor operation control system according to the present invention can be used in a field where no-load operation time is long, a field where load / no-load change is frequent, and a factory where the capacity of the factory is low.

5A and 5B are flowcharts illustrating an operation control method of a compressor for energy saving according to the present invention. The operation and control method of the compressor according to the present invention includes a compressor unit 10 for supplying compressed air, A monitoring unit 30 for collecting and recording the amount of power and the load ratio according to the real-time operation status of the compressor from the sensor installed in the compressor unit 10, and a multifunctional hybrid control unit 40, The operation flow of the first to fourth steps of the compressor operation control method performed by the multifunctional hybrid control unit 40 based on the amount of power and the load factor recorded by the monitoring unit 30 in the control system is illustrated.

The first step (a) includes the steps of checking the operation record data of the monitoring unit 30 (S101), checking the operation record data of the monitoring unit 30 (S102, S103) of analyzing the power amount and the load ratio (loading / unloading ratio) of the compressors by the time of day, extracting a multi-speed controllable interval zone according to the day of the week and the air demand amount for each time zone required for energy saving in the actual environment ). The first step may be performed by the data analyzing and extracting unit 41 of the multifunctional hybrid control unit 40 of the present invention, and the operation history data accumulated for a predetermined period of time may be transmitted to the multifunctional hybrid control unit 40 The analyzing and extracting unit 41 analyzes the result of the analysis, and determines a schedule in which a state in which the load factor (ratio of the load operation / no-load operation) is 4: 6 or less is maintained for a predetermined constant time is referred to as a schedule setting It is possible to extract it according to the possible multi-speed controllable section.

The second step (b) is performed when the multi-speed controllable interval information is extracted. The second step (b) includes a step (S105) of checking whether the multi-speed control period interval is set for energy saving Comparing the information of the set multi-speed control zone and the currently extracted multi-zone speed controllable zone, and confirming whether the information is matched (S106, S107) (Step S108), so that the operation control method of the compressor can be set to the multi-step speed control method using the relevant section information. At this time, data displayed on the monitoring screen may include weekly power (kwh), current power (kwh), load rate, time, operation status, pressure (bar), temperature (° C), rpm and the like. The second step may be performed by the data analyzing and extracting unit 41 of the multifunctional hybrid control unit 40 of the present invention and the data analysis and extraction unit 41 may be configured to perform the multi- (S106 and S107) whether or not the multi-speed control zone is presently set and the currently-selected multi-zone controllable zone if the multi-zone control zone is set in advance, (Or a pop-up screen) on the monitoring screen (S108), the manager sets the operation control method of the compressor to the multi-speed control method using the schedule information of the corresponding section, or redefines the preset schedule information So that the user can be informed.

The third step (c) includes steps S109-S111 of confirming whether the administrator sets the multi-speed control interval zone for each day of the week and the time zone within the designated time using the information presented through the monitoring screen And a step S112 of setting a multistep controllable period zone for each time period to a multistep control period of a compressor for each day of the week and a time period for energy saving. The multifunction control unit 42 of the present invention can perform the third step by using the schedule information of the multi-speed controllable interval group for each day of the week and the time period presented through the monitoring screen, The schedule information of the multi-speed controllable interval group for each day of the week and the time group selected by the manager is set for each day of the week for energy saving and the time It is possible to set and store (S112) the schedule information of the multi-speed control period group of the compressor by the group.

In the fourth step (d), the present time is checked to check whether the multi-speed control zone of the compressor has arrived by the day of the week and the time zone for saving the energy (S113). When the corresponding zone comes, the operation control method of the compressor (S114) of controlling the controller unit 20 so as to switch to the multi-speed on / off control system. The control unit 20 checks the current time and determines whether the multi-speed control period zone of the compressor is set for each day of the week And a step S116 of controlling the controller unit 20 to switch the operation control system of the compressor to the PID control system when the corresponding interval has elapsed. The fourth step may be performed by the hybrid control unit 42 of the present invention. The hybrid control unit 42 of the present invention may check the present time and set a multi-step control period (S113). When the corresponding interval arrives (Y branch in S113), the controller unit 20 is controlled (S114) to switch the operation control system of the compressor to the multi-speed on / off control system The controller unit 20 can control the operation of the compressor unit 10 on the basis of an on / off control method in the corresponding section, and the multi-speed control period unit of the compressor for each day and time (Y branch in S115), the controller unit 20 is controlled to switch the operation control system of the compressor to the PID control system (S116), and the controller unit 20 is controlled by the PID control system So that the operation of the shoe section 10 can be controlled.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, Modification is possible. Accordingly, the spirit of the present invention should be understood only in accordance with the following claims, and all equivalents or equivalent variations thereof are included in the scope of the present invention.

10: Compressor section
20:
30: Monitoring section
31:
40: Multifunctional composite control unit
41: Data analysis and extraction section
42:

Claims (7)

delete (10), a controller (20) for controlling the operation of the compressor unit (10), and a controller for controlling the operation of the compressor unit (10) And a monitoring unit (30) for collecting and recording the collected data,
The operation record data recorded by the monitoring unit is analyzed to extract a multi-speed controllable interval based on the load rate according to the day of the week and the amount of air required for the time required for energy saving in a real environment and provides the monitoring interval as a monitoring screen, The control section for automatically switching the operation control mode of the compressor to the multi-speed control mode in the corresponding zone by setting the multi-zone control zone by the day of the week and the time zone selected by the day, and the multi- And a multifunctional hybrid control unit (40)
The multi-function combined control unit (40)
The power amount and the load ratio of the compressor according to the day of the week and the time of day are analyzed from the operation record data of the monitoring unit 30 cumulatively recorded for a predetermined predetermined time before the present time to calculate the air demand Speed control zone for energy saving, and whether or not the preset multi-speed control zone information and the currently extracted multi-speed controllable zone information match with each other, A data analyzing and extracting unit (41) for providing a monitoring screen capable of setting the operation control method of the compressor to the multi-step speed control system with the multi-speed controllable interval information; And
The control unit checks whether or not the multi-speed control zone zone is set for each day of the week and the time zone by the manager using the information provided through the monitoring screen, and controls the multi-zone speed control zone for each day and time zone selected by the administrator. Speed control period, and confirms whether or not the multi-speed control period interval of the compressor has been reached and elapsed for each day of the week and for the set energy saving period, and the operation control method of the compressor is turned on / And a hybrid control unit (42) for controlling the controller unit (20) to switch to a control mode. The data analysis and extraction unit (41) according to claim 2,
Wherein a period in which a state in which the load factor (ratio of load operation / no-load operation) is 4: 6 or less is maintained for a predetermined constant time is analyzed as a result of analysis of the operation record data, Operation control system. delete A monitoring unit for collecting and recording a power amount and a load factor according to a real-time operation state of the compressor from a sensor installed in the compressor unit, and a control unit for controlling the operation of the compressor, And a multifunctional hybrid control unit for controlling a compressor operation mode of the controller unit based on a power amount and a load factor recorded by the compressor control unit, the method comprising:
(loading / unloading ratio) of the compressor according to the day and time of the day is analyzed from the operation record data of the monitoring part accumulated for a predetermined predetermined time before the current time, A first step of extracting a multi-speed controllable interval zone based on a load factor according to a time-scale air demand amount;
(b) whether or not the multi-speed control zone is set in advance and whether or not the preset multi-speed control zone and the currently extracted multi-speed control zone are coincident with each other are checked, and based on the currently extracted multi-zone control zone, A second step of providing a monitoring screen capable of setting a control zone;
(c) Through the monitoring screen, it is confirmed whether the multi-speed control zone zone is set for the day of the week and the time zone of the manager, and the multi-zone speed control zone for each day and time zone selected by the administrator is checked by the day / A third step of setting the control period as a control period; And
(d) checking whether or not the multi-speed control zone set in the preset multi-speed control zone or the third zone has arrived or not, and switching the operation control mode of the compressor to the on / off control mode in the corresponding zone And controlling the controller unit to switch the operation control system of the compressor to the PID control system in a section other than the corresponding section. [5] The method of claim 1, 6. The method according to claim 5,
Wherein a period in which a state in which the load factor (ratio of load operation / no-load operation) is 4: 6 or less is maintained for a predetermined constant time as a result of analysis of the operation record data is extracted as a multi- Operation control method. 6. The method of claim 5, wherein the data displayed on the monitoring screen in the second step comprises:
Wherein the operating state of the compressor is determined based on the following equation: kWh, kWh, load factor, time, operation state, pressure, bar, temperature, and rpm.
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