WO2019194371A1

WO2019194371A1 - Method for controlling air conditioning system

Info

Publication number: WO2019194371A1
Application number: PCT/KR2018/010139
Authority: WO
Inventors: 김대형; 김선택; 사용철
Original assignee: 엘지전자 주식회사
Priority date: 2018-04-04
Filing date: 2018-08-31
Publication date: 2019-10-10
Also published as: KR20190115892A; KR102122592B1

Abstract

The present invention relates to a method for controlling an air conditioning system. The method for controlling an air conditioning system, according to idea of the present invention, comprises the steps of: inputting power and a set temperature; measuring outdoor temperature, indoor temperature, and outdoor humidity; determining a required heat quantity according to the set temperature, the outdoor temperature, the indoor temperature, and the outdoor humidity; initially operating a plurality of control components so as to provide a supply heat quantity which is the same as the required heat quantity; calculating an initial COP by dividing the supply heat quantity by power consumption; and deriving a maximum COP by regulating an operation value of the control components. The control component includes an inverter compressor and a fan, and the operation value of the control component includes the operation frequency of the inverter compressor and the rotational speed of the fan.

Description

Control method of air conditioning system

The present invention relates to a control method of an air conditioning system.

An air conditioning system is a system for maintaining air in a predetermined space in a state most suitable for use and purpose. In general, the air conditioning system includes a compressor, a condenser, an expansion device, and an evaporator, and a refrigerant cycle for performing the compression, condensation, expansion, and evaporation processes of the refrigerant is driven to cool or heat the predetermined space.

In this case, the predetermined space may be variously proposed according to the place where the air conditioning system is used. For example, when the air conditioning system is used in a home or an office, the predetermined space may be an indoor space of a house or a building. In addition, when the air conditioning system is used in a car, the predetermined space may be a boarding space in which a person boards.

The air conditioning system includes an indoor unit disposed in the predetermined space and an outdoor unit connected to form the indoor unit and the refrigerant cycle. Such an air conditioning system can provide harmonized air for the convenience of the user.

The applicant has applied for a technology related to an air conditioning system as follows.

(1) First prior document: Korean Patent Laid-Open Publication No. 10-2015-0097174, a remote control unit of an air conditioner and an air conditioner including the same

(2) Second Prior Art: Patent No. 10-1203559, Air Conditioning System with Group Control and Its Operation Method

These prior documents control the air conditioning system to provide harmonious air to the user. At this time, the first prior literature and the second prior literature are controlled so that various control configurations are operated in the same manner according to the set temperature input. It can be understood that it is controlled to have a maximum COP at which the power consumption is minimum according to the value stored by the experiment.

However, such an air conditioning system may have very different conditions depending on where it is installed. That is, according to the installed place, the value obtained by the experiment may not correspond to the value operated to have the maximum COP.

Accordingly, the air conditioning system has a problem in that it operates so that a relatively large amount of power is consumed. In addition, the efficiency is changed according to the installation conditions there is a problem that the user's reliability is lowered.

The present invention provides a control method of an air conditioning system that is operated to have a maximum COP at all times regardless of the installation place and installation conditions.

In addition, by controlling the inverter compressor, fan, etc. according to the input conditions step by step to derive the operating state having the maximum COP, and provides a control method of the air conditioning system that is operated to have the maximum COP.

In the control method of the air conditioning system according to the spirit of the present invention, the step of inputting the power and the set temperature, the step of measuring the outdoor temperature, the indoor temperature and the outdoor humidity, the set temperature, the outdoor temperature, the indoor temperature and the outdoor humidity Determining a required amount of heat according to the method, initializing a plurality of control elements to provide the same amount of supply heat as the required amount of heat, calculating an initial COP by dividing the supply heat amount by power consumption, and an operation value of the control element. The step of adjusting the maximum COP is derived. In this case, the control configuration includes an inverter compressor and a fan, and the operating value of the control configuration includes an operating frequency of the inverter compressor and a rotation speed of the fan.

Further, in the step of deriving the maximum COP by adjusting the operation value of the control configuration, the control configuration is operated to the basic operation value, the step of calculating the basic COP by dividing the amount of heat supplied by the power consumption and the control configuration to the The operation may be performed by changing from a basic operation value to a modified operation value, and calculating a modified COP by dividing the supply calories by power consumption.

In addition, comparing the basic COP and the modified COP and when the basic COP is high, the control configuration is operated at the basic operation value, and when the correction COP is high, the control configuration is operated at the correction operation value. Steps may be included.

According to the present invention, the air conditioning system can be operated to have a maximum COP at all times.

Accordingly, there is an advantage that the power consumed by the operation of the air conditioning system is minimized.

In addition, by storing the operating state having the maximum COP, there is an advantage that the operation having the maximum COP can be performed immediately under the same control condition.

In addition, there is an advantage that it is possible to ensure the reliability of the user because it is always operated to have the maximum COP.

1 is a view showing the configuration of an air conditioning system according to an embodiment of the present invention.

2 is a view showing a control configuration of an air conditioning system according to an embodiment of the present invention.

3 is a view showing a basic control flow of the air conditioning system according to an embodiment of the present invention.

4 is a diagram illustrating a control flow in which a maximum COP of an air conditioning system according to a first embodiment of the present invention is derived.

FIG. 5 is a diagram illustrating a control flow for deriving a maximum COP of an air conditioning system according to a second embodiment of the present invention.

FIG. 6 is a diagram illustrating a control flow for deriving a maximum COP of an air conditioning system according to a third embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to the accompanying drawings. In adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible even though they are shown in different drawings. In addition, in describing the embodiments of the present invention, when it is determined that a detailed description of a related well-known configuration or function interferes with the understanding of the embodiments of the present invention, the detailed description thereof will be omitted.

In addition, in describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only for distinguishing the components from other components, and the nature, order or order of the components are not limited by the terms. If a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected or connected to that other component, but between components It will be understood that may be "connected", "coupled" or "connected".

1 is a view showing the configuration of an air conditioning system according to an embodiment of the present invention. The air conditioning system 10 may include at least one outdoor unit and at least one indoor unit. Hereinafter, for convenience of description, each configuration for forming a refrigerant cycle without being divided into an outdoor unit and an indoor unit will be described.

As shown in FIG. 1, the air conditioning system 10 according to the spirit of the present invention includes an outdoor heat exchanger 11, a compressor 12, an indoor heat exchanger 13, and

expansion valves

14 and 15. do. In addition, the outdoor heat exchanger 11, the compressors 12 and 20, the indoor heat exchanger 13 and the

expansion valves

14 and 15 are connected by a refrigerant pipe.

The outdoor heat exchanger 11 may be disposed in the outdoor space so that heat exchange between the outdoor air and the refrigerant is performed. In addition, the air conditioning system 10 further includes a fan 30 installed at one side of the outdoor heat exchanger 11. By the operation of the fan 30, the outdoor air may be forced convection to heat exchange with the outdoor heat exchanger (11).

The compressors 12 and 20 correspond to a configuration for compressing the flowing refrigerant. The compressor includes a constant speed compressor 12 having a constant compression capacity and an inverter compressor 20 having a variable compression capacity.

The indoor heat exchanger 13 may be disposed in an indoor space such that heat exchange between indoor air and a refrigerant occurs. In this case, the indoor space may be understood as a space in which the air conditioning system 10 is installed to provide harmonious air.

At this time, the indoor heat exchanger 13 may be provided in plurality. Each indoor heat exchanger 13 may be arranged in different spaces, and the air conditioning system 10 may match air in different spaces.

In FIG. 1, three indoor heat exchangers 13 are exemplarily illustrated, but the number of the indoor heat exchangers 13 is not limited thereto. In addition, an indoor fan for forced convection of indoor air may be installed at one side of the indoor heat exchanger 13.

The

expansion valves

14 and 15 include an outdoor expansion valve 14 installed adjacent to the outdoor heat exchanger 11 and an indoor expansion valve 15 installed adjacent to the indoor heat exchanger 13. do. The outdoor expansion valve 14 and the indoor expansion valve 15 may be configured as a valve that can adjust the opening degree, such as an electronic expansion valve (EEV).

At this time, the indoor expansion valve 15 is provided in a number corresponding to the indoor heat exchanger 13 provided in plurality, it may be installed on one side of each indoor heat exchanger (13). The indoor expansion valve 15 is operated to selectively block the refrigerant flowing into each indoor heat exchanger 13 depending on whether the indoor heat exchanger 13 is operated.

The air conditioning system 10 includes an accumulator 16 for filtering liquid refrigerant from among refrigerants flowing toward the compressor 12, and a flow direction of the refrigerant discharged from the compressor 12 in the outdoor heat exchanger. Further included is a flow diverting unit 17 for selectively converting to the unit 11 or the indoor heat exchanger 13.

According to the operation mode of the air conditioning system 10, the flow direction of the refrigerant by the flow switching unit 17 may be switched.

In detail, when the air conditioning system 10 is heated and operated, the flow switching unit 17 flows the refrigerant discharged from the compressor 12 to the indoor heat exchanger 13. In addition, the indoor expansion valve 15 is fully open and the outdoor expansion valve 14 is partially open.

Therefore, the refrigerant passing through the indoor heat exchanger 13 passes through the indoor expansion valve 15 without changing its state, expands while passing through the outdoor expansion valve 14, and then flows into the outdoor heat exchanger 11. Can be.

On the other hand, when the air conditioning system 10 is cooled and operated, the flow switching unit 17 flows the refrigerant discharged from the compressor 12 to the outdoor heat exchanger 11. In addition, the outdoor expansion valve 14 is fully open, and the indoor expansion valve 15 is partially open.

Therefore, the refrigerant passing through the outdoor heat exchanger 11 passes through the outdoor expansion valve 14 without changing its state, expands while passing through the indoor expansion valve 15, and then flows into the indoor heat exchanger 13. Can be.

In addition, the air conditioning system 10 further includes a refrigerant amount adjusting unit for adjusting the flow amount of the refrigerant circulating in the refrigeration cycle. In detail, the refrigerant amount adjusting unit includes a receiver 18 for storing at least a portion of the refrigerant circulating in the refrigerating cycle, and a receiver valve 40 for adjusting the amount of refrigerant flowing into the receiver 18.

The receiver 18 is understood as an apparatus capable of storing at least some of the refrigerant circulating in the air conditioning system 10, such as a tank in which the refrigerant is received. The receiver valve 40 may be installed at one side of the receiver 18 to adjust the amount of refrigerant stored in the receiver 18.

In FIG. 1, the receiver valve 40 is installed only on the inflow side of the receiver 18, but the receiver valve 40 may be installed in various positions and forms. For example, the receiver valve 40 may be configured as a valve that can adjust the opening degree, such as an electromagnetic expansion valve (EEV).

Figure 1 shows an exemplary form constituting the air conditioning system according to the spirit of the present invention, each configuration may be added or omitted.

As shown in FIG. 2, the air conditioning system 10 according to the spirit of the present invention is provided with a controller 100 for controlling various configurations.

In addition, the air conditioning system 10 includes

user input units

50 and 51 for transmitting a predetermined command to the controller 100 and

measurement units

52, 53, and 54 for transmitting predetermined information.

The

user input units

50 and 51 may be understood as a configuration in which predetermined information is input to the air conditioning system 10 by a user. The

user input units

50 and 51 include a power supply unit 50 for inputting ON / OFF of the air conditioning system 10 and a setting temperature input unit 51 for inputting a set temperature required for the harmonic space.

In addition, even when there is no input by the user, if a predetermined condition is satisfied, the air conditioning system 10 may be automatically turned on / off or a set temperature may be automatically input. In addition, the

user input units

50 and 51 may further include a configuration in which various modes are input.

The measuring

units

52, 53, and 54 may be understood as configurations in which various pieces of information related to the harmonic space are measured. The measuring

unit

52, 53, 54 includes an outdoor temperature sensor 52, an indoor temperature sensor 53, and an indoor humidity sensor 54.

The outdoor temperature sensor 52 may be installed at the suction side of the outdoor heat exchanger 11 to measure the outdoor temperature. In addition, the indoor temperature sensor 53 and the indoor humidity sensor 54 may be installed at the suction side of the indoor heat exchanger 13 to measure the indoor temperature and the indoor humidity, respectively.

The controller 100 may control various configurations through commands or information transmitted from the

user input units

50 and 51 and the

measurement units

52, 53, and 54. In particular, the controller 100 may control the inverter compressor 20, the fan 30, and the receiver valve 40 at each stage.

As shown in FIG. 2, the inverter compressor 20, the fan 30 and the receiver valve 40 may be operated in any one of the first stage to the X stage (X = A, B, C). have. For example, the first stage of the inverter compressor 20 is 130HZ and may be increased by 1HZ for each stage. That is, the sixth step of the inverter compressor 20 may correspond to 135HZ.

Also, for example, the first stage of the fan 30 is 700 RPM, and may be increased by 50 RPM for each stage. In addition, the first stage of the receiver valve 40 may be a state in which the refrigerant flowing into the receiver 18 is completely blocked when the opening degree is zero.

In addition, the air conditioning system 10 includes a memory unit 55 storing various data. The memory unit 55 may store an experimental operation value related to the operation of the air conditioning system 10. For example, an operating value for operating the air conditioning system 10 to have a maximum COP under a predetermined condition may be stored.

At this time, COP (Coefficient Of Performance) can be understood as a cooling and heating performance coefficient of the air conditioning system. The COP may be calculated by dividing the amount of heat supplied from the air conditioning system by the amount of power consumed (COP = supply calories / power consumption). This COP is a value that determines the efficiency of the air conditioning system, and can be understood as the most important value in the operation of the air conditioning system.

However, the operation value stored in the memory unit 55 corresponds to a value having a maximum COP when the air conditioning system 10 is installed in a laboratory having a predetermined condition. That is, when the air conditioning system 10 is installed in another place, the operation having the maximum COP may not be performed as the operation value stored in the memory unit 55.

Accordingly, the present invention controls the air conditioning system 10 to operate with the maximum COP at any place. Hereinafter, the control method of the air conditioning system 10 will be described in detail.

As shown in FIG. 3, a power source and a set temperature are input (S10). As described above, it may be input by the user through the power supply unit 50 and the set temperature input unit 51.

Then, outdoor temperature, indoor temperature and outdoor humidity are measured (S20). As described above, the outdoor temperature sensor 52, the indoor temperature sensor 53, and the indoor humidity sensor 54 may be measured and information about the same may be transmitted.

The required heat amount is determined according to the input set temperature, the measured outdoor temperature, the indoor temperature, and the outdoor humidity input as described above (S30). Such control is performed in a general air conditioning system, and a detailed description thereof will be omitted.

In the air conditioning system according to the spirit of the present invention, a plurality of control configurations are initially operated to provide the same amount of supply heat as the required amount of heat (S40). At this time, the operation of the plurality of control configurations to the operating value stored in the memory unit 55 is referred to as initial operation. As described above, the operating value stored in the memory unit 55 corresponds to a value having a maximum COP when the air conditioning system 10 is installed in a laboratory.

In addition, the plurality of control configurations correspond to the devices constituting the air conditioning system 10. In particular, the plurality of control configurations correspond to the configuration that affects the COP of the air conditioning system 10. In detail, the COP may be adjusted as the operation values of the plurality of control configurations are adjusted.

In addition, the supply heat amount is calculated by subtracting the subcooled enthalpy from the discharge enthalpy in the heating operation, and is calculated by subtracting the subcooled enthalpy from the suction enthalpy in the cooling operation. Such calculation is performed in a general air conditioning system, and detailed description thereof will be omitted.

Then, it is checked whether or not the supply heat amount is equal to the required heat amount (S50). This process may be repeatedly performed as to be premised on the operation of the air conditioning system 10. That is, for convenience of description, the corresponding process is described only once, but while the air conditioning system 10 is operated, it is continuously checked whether the supply heat quantity and the required heat quantity are the same.

In addition, when the supply heat amount and the required heat amount are not the same, the operation value is changed (S55). In this case, the changed value may be smaller than the change value of each step described above. For example, the operating value of the inverter compressor 20 may be changed by 0.5 HZ or the operating value of the fan 30 may be changed by 10 RPM.

In addition, it can be recognized that the difference between the supply calorie and the required calorie is within the predetermined range. For example, it is determined that the difference between the supply calories and the required calories is equal to or less than 2%.

In addition, it is possible to check whether the air conditioning system 10 is operated stably. Whether the air conditioning system 10 is operated stably is determined whether the refrigerant is stable.

That is, it is determined that the evaporation pressure, the condensation pressure, the suction temperature, and the discharge temperature of the refrigerant are stabilized when they are not controlled. For example, when the evaporation pressure, the condensation pressure, the suction temperature, and the discharge temperature of the refrigerant are not adjusted for more than 3% for 5 minutes, it may be determined that the refrigerant is stable.

Then, the air conditioning system 10 according to the spirit of the present invention is operated to derive the maximum COP (S60). At this time, the air conditioning system 10 adjusts the operation value of the control configuration to derive the maximum COP.

In addition, when the maximum COP is derived, a value at which the plurality of control configurations are operated is stored (S70). At this time, the operation value of the control configuration is referred to as the maximum operation value. Accordingly, when the same set temperature, the outdoor temperature, the indoor temperature and the outdoor humidity are input, the maximum COP derivation process may be omitted and the control configuration may be operated at the maximum operating value.

Hereinafter, the air conditioning system 10 will be described in detail with reference to FIGS. 4 to 6 with reference to an embodiment in which the maximum COP is driven to be derived.

As shown in FIG. 4, the air conditioning system 10 is operated at a basic operation value (S601). In this case, the basic operation value may include the initial operation value. That is, when such a step is first performed, the basic operation value corresponds to the operation value stored in the memory unit 55.

Then, the basic COP is calculated by dividing the amount of heat supplied by the consumed power (S602). In this case, when the basic operation value is the initial operation value, the basic COP may be referred to as an initial COP.

Then, the air conditioning system 10 is operated by changing the operation value of the control configuration (S603). In this case, the changed operation value is referred to as a modified operation value. That is, the control configuration is changed from the basic operation value to the modified operation value and operated.

Then, the modified COP is calculated by dividing the amount of heat supplied by the power consumed (S604). In this case, since the supply heat amount is the same value as the required heat amount determined according to the input, the basic COP and the modified COP vary according to the power consumed.

Then, the basic COP and the modified COP are compared (S605). When the basic COP is high, the control configuration is operated at the basic operation value, and when the correction COP is high, the control configuration is operated at the correction operation value.

That is, when the basic COP is high, the control configuration is again driven to the basic operation value (S601). The air conditioning system 10 may be operated with a new modified operation value (S602), calculate a new modified COP (S603), and compare it with the basic COP (S604).

On the other hand, when the correction COP is high, the control arrangement continues to operate at the correction operation value. The basic operation value is changed to the corrected operation value and stored (S607). That is, the corrected operation value becomes a new basic operation value.

Then, the air conditioning system is operated again with the basic operation value (S601). At this time, the basic operation value corresponds to a value different from the basic operation value in the previous step. The basic COP is calculated again by dividing the supply heat by the power consumption (S602).

The air conditioning system 10 is operated by changing from the basic operation value to a new modified operation value (S603), and dividing the supply heat amount by power consumption to calculate a new modified COP (S604). Then, the newly calculated basic COP and the modified COP are compared (S605).

That is, the air conditioning system 10 performs the steps S601 to S605 repeatedly to derive the maximum COP. In this case, whether the maximum COP is determined may be determined by comparing the basic COP with the modified COP when the basic COP is higher than a predetermined number of times (S606). In this case, the basic COP may be stored as the maximum COP, and the basic operation value from which the maximum COP is derived may be stored as the maximum operation value.

In detail, the coefficient of the control structure which affects the air conditioning system 10 COP value is limited, and the operation value of the control structure is adjusted within a limited range. That is, since the number of adjustable correction operation values is limited, the maximum COP can be derived when the steps S601 to S605 are repeatedly performed more than a predetermined number of times.

Hereinafter, the number of the control structure and the control value of the control structure will be limited and described in detail.

In FIG. 5, the case where the inverter compressor 20 and the fan 30 are provided as the control configuration will be described. In addition, the operating value of the control configuration includes the operating frequency of the inverter compressor 20 and the rotational speed of the fan 30, the operation value can be adjusted for each step.

As described above, the inverter compressor 20 and the fan 30 may be operated in any one of the X stages (X = A, B) in the first stage. Hereinafter, for convenience of description, the operating values of the inverter compressor 20 and the fan 30 are numerically limited. Such numerical ranges are exemplary and are not limited thereto.

For example, the inverter compressor 20 and the fan 30 are operated in the first to tenth stages. In addition, the first stage of the inverter compressor 20 is 130HZ and is increased by 1HZ for each stage. In addition, the first stage of the fan 30 is 700 RPM, and is increased by 50 RPM for each stage.

As described with reference to FIG. 4, it is assumed that the air conditioning system 10 is operated at a basic operation value (S611), and the basic operation value is the initial operation value. In addition, a basic COP, that is, an initial COP is calculated by dividing the amount of heat supplied to consumed power (S612).

For example, it is assumed that the initial operation value is a sixth stage of the inverter compressor 20 and a third stage of the fan 30. That is, the air conditioning system 10 is initially operated such that the inverter compressor 20 is operated at 135 HZ and the fan 30 is operated at 800 RPM.

The air conditioning system 10 is operated by changing the operation value of the control arrangement. First, the operation frequency of the inverter compressor 20 is increased by one step, and the rotational speed of the fan 30 is decreased by one step (S613). As such, the inverter compressor 20 and the fan 30 may be adjusted in different directions to maintain the supply capacity and to stabilize the system.

That is, the inverter compressor 20 is operated in a seventh stage and the fan 30 is changed in a second stage. Then, the modified COP is calculated by dividing the supply heat by the consumed power (S614). Then, the basic COP and the modified COP are compared (S615).

If the correction COP is high, the control arrangement continues to operate at the correction operation value. This may be understood as changing the operation value of the inverter compressor 20 to increase the operation value of the fan 30 to increase the COP.

The basic operation value is changed to the corrected operation value and stored (S616). That is, the seventh stage of the inverter compressor 20 and the second stage of the fan 30 are stored as basic operation values.

In addition, the air conditioning system 10 increases the operation frequency of the inverter compressor 20 again by one step and decreases the rotational speed of the fan 30 by one step (S613). Accordingly, the inverter compressor 20 is operated in the eighth stage and the fan 30 is operated in the first stage.

That is, the operating value of the control configuration can be continuously raised or lowered in the direction in which the COP is raised. This may be done continuously until the COP is no longer raised or outside the range of rise and fall. In general, the control range of the control configuration is widely specified, and the control is determined according to the change of the COP value. Therefore, in FIG. 5, the case where the control configuration is out of the range of rise and fall is omitted.

On the other hand, if the basic COP is high, the control configuration is again driven to the basic operating value (S621). That is, the inverter compressor 20 is operated in a sixth stage and the fan 30 is changed in a third stage. This may be understood as changing the operation value of the inverter compressor 20 to increase the operation value of the fan 30 to lower the COP.

Therefore, the operation frequency of the inverter compressor 20 is decreased by one step, and the rotational speed of the fan 30 is increased by one step (S623). That is, the operation values of the inverter compressor 20 and the fan 30 are changed in a direction different from the previous one.

That is, the inverter compressor 20 is operated in the fifth stage and the fan 30 is changed in the fourth stage. In addition, a modified COP is calculated by dividing the supply heat amount by the consumed power (S624), and comparing the basic COP with the modified COP (S625).

If the correction COP is high, the control arrangement continues to operate at the correction operation value. That is, the inverter compressor 20 is operated in the fifth stage, and the fan 30 is operated in the fourth stage. This may be understood as changing the operating value of the inverter compressor 20 to lower the operating value of the fan 30 and raising the COP.

The basic operation value is changed to the corrected operation value and stored (S626). That is, the fifth stage of the inverter compressor 20 and the fourth stage of the fan 30 are stored as basic operation values.

In addition, the air conditioning system 10 again lowers the operation frequency of the inverter compressor 20 by one step and increases the rotational speed of the fan 30 by one step (S623). Accordingly, the inverter compressor 20 is operated in the fourth stage and the fan 30 is operated in the fifth stage. That is, as described above, the operation value of the control configuration can be continuously raised or lowered in the direction in which the COP is raised.

On the other hand, when the basic COP is high, it may be understood that the operation value of the inverter compressor 20 is lowered and the operation value of the fan 30 is increased to lower the COP. In conclusion, it can be understood that changing the operating values of the inverter compressor 20 and the fan 30 lowers the COP.

Therefore, the basic COP is stored as the maximum COP without changing the operation values of the inverter compressor 20 and the fan 30 anymore (S630). As such, the air conditioning system 10 may derive the maximum COP by increasing or decreasing the operating values of the inverter compressor 20 and the fan 30.

In FIG. 6, the case where the receiver valve 40 is included in the control configuration will be described. In addition, the operation value of the control configuration includes the opening amount of the receiver valve 40, the operation value can be adjusted for each step. As described above, the receiver valve 40 may be operated in any one of the X stage (X = C) in the first stage.

As shown in FIG. 6, the air conditioning system 10 is operated with a basic operation value (S631), and a basic COP is calculated (S632). In this case, the basic operating value may correspond to an operating value having the maximum COP derived in FIG. 5. That is, the maximum COP of the system is derived by changing the operation value of the receiver valve 40 at the maximum COP that can be derived by increasing or decreasing the operation values of the inverter compressor 20 and the fan 30.

Accordingly, the air conditioning system 10 may derive the maximum COP by changing operating values of the inverter compressor 20, the fan 30, and the receiver valve 40. At this time, the operating value of the inverter compressor 20 and the fan 30 which have a relatively large influence on the COP value may be adjusted first, and then the operating value of the receiver valve 40 may be adjusted.

First, the opening amount of the receiver valve 40 is increased by one step (S633). Then, the modified COP is calculated by dividing the supply heat by the consumed power (S634). Then, the basic COP and the modified COP are compared (S635).

If the correction COP is high, the control arrangement continues to operate at the correction operation value. It can be understood that the change to increase the opening amount of the receiver valve 40 raises the COP.

The basic operation value is changed to the corrected operation value and stored (S636). In addition, the air conditioning system 10 increases the opening amount of the receiver valve 40 again (S633). That is, the opening amount of the receiver valve 40 can be continuously increased in the direction in which the COP is raised.

On the other hand, when the basic COP is high, the control configuration is again driven to the basic operation value (S641). It can be understood that the change to increase the opening amount of the receiver valve 40 lowers the COP.

Therefore, the opening amount of the receiver valve 40 is lowered by one step (S643). That is, the operation value of the receiver valve 40 is changed in a direction different from the previous one. The modified COP is calculated by dividing the amount of heat supplied by the consumed power (S644), and comparing the basic COP with the modified COP (S645).

If the correction COP is high, the control arrangement continues to operate at the correction operation value. It can be understood that the change to lower the opening amount of the receiver valve 40 raises the COP. In addition, the air conditioning system 10 lowers the opening amount of the receiver valve 40 by one step (S643). That is, the opening amount of the receiver valve 40 can be continuously lowered in the direction in which the COP is raised.

On the other hand, when the basic COP is high, it can be understood that the change to lower the opening amount of the receiver valve 40 lowers the COP. In conclusion, it can be understood that changing the opening amount of the receiver valve 40 lowers the COP.

Therefore, the basic COP is stored as the maximum COP without changing the opening amount of the receiver valve 40 anymore (S650). As such, the air conditioning system 10 may derive the maximum COP by increasing or decreasing the operation values of the inverter compressor 20, the fan 30, and the receiver valve 40.

Claims

Inputting a power source and a set temperature;

Measuring outdoor temperature, indoor temperature, and outdoor humidity;

Determining a required amount of heat according to the set temperature, the outdoor temperature, the indoor temperature, and the outdoor humidity;

Initially operating a plurality of control configurations to provide a supply heat quantity equal to the required heat quantity;

Calculating an initial COP by dividing the supply calories by power consumption; And

Adjusting a driving value of the control configuration to derive a maximum COP;

The control configuration includes an inverter compressor and a fan,

And the operating frequency of the inverter compressor and the rotational speed of the fan are included in the operation value of the control configuration.
The method of claim 1,

In the step of deriving the maximum COP by adjusting the operation value of the control configuration,

Operating the control configuration at a basic operation value, and calculating a basic COP by dividing the supply heat by power consumption; And

Operating the control configuration by changing from the basic operation value to a modified operation value, and dividing the supply calories by power consumption to calculate a modified COP;

Control method of an air conditioning system, characterized in that it is included.
The method of claim 2,

In the step of deriving the maximum COP by adjusting the operation value of the control configuration,

Comparing the basic COP with the modified COP; And

When the basic COP is high, the control configuration is operated at the basic operating value, and when the corrected COP is high, the control configuration is operated at the corrected operating value;

Control method of an air conditioning system, characterized in that it further comprises.
The method of claim 3, wherein

In the step of deriving the maximum COP by adjusting the operation value of the control configuration,

If the correction COP is high, the control arrangement is driven to the correction operation value,

And changing and storing the basic operation value into the modified operation value.
The method of claim 4, wherein

In the step of deriving the maximum COP by adjusting the operation value of the control configuration,

Changing the basic operation value to the corrected operation value and storing the modified operation value so that the control configuration is operated with the new basic operation value, and the new basic COP is calculated by dividing the supply heat amount by the power consumption; And

Operating the control configuration by changing from the basic operation value to a new correction operation value, and dividing the supply calories by power consumption to calculate a new modified COP;

Control method of an air conditioning system, characterized in that it is included.
The method of claim 5,

When the basic COP is higher than the predetermined COP by comparing the modified COP with a predetermined number of times,

And storing the basic COP as the maximum COP and storing the basic operation value from which the maximum COP is derived as the maximum operation value.
The method of claim 6,

And when the same set temperature, the outdoor temperature, the indoor temperature, and the outdoor humidity are input, the control configuration is initially operated at the maximum operating value.
The method of claim 1,

In the step of deriving the maximum COP by adjusting the operation value of the control configuration,

Calculating the basic COP by operating the inverter compressor and the fan by the basic operation value and dividing the supply heat by the power consumption; And

Increasing the operating frequency of the inverter compressor by one step, lowering the rotational speed of the fan by one step, and calculating a modified COP by dividing the supply heat by the power consumption;

Control method of an air conditioning system, characterized in that it is included.
The method of claim 8,

In the step of deriving the maximum COP by adjusting the operation value of the control configuration,

Comparing the basic COP with the modified COP;

Operating the control configuration at the basic operation value when the basic COP is high; And

Lowering the operation frequency of the inverter compressor by one step and increasing the rotational speed of the fan by one step, and dividing the supply heat by the power consumption to calculate a new modified COP;

Control method of an air conditioning system, characterized in that it further comprises.
The method of claim 9,

In the step of deriving the maximum COP by adjusting the operation value of the control configuration,

Calculating a new modified COP and comparing the modified COP with the basic COP; And

And storing the basic COP as a maximum COP when the basic COP is high.
The method of claim 10,

In the step of deriving the maximum COP by adjusting the operation value of the control configuration,

Comparing the basic COP and the modified COP, when the modified COP is high, the new modified COP is calculated by dividing the operating frequency of the inverter compressor by one step, increasing the rotation speed of the fan by one step, and dividing the supply heat by the power consumption. It is further included;

And comparing the basic COP with the modified COP and repeatedly performing the same until the basic COP is high.
The method of claim 9,

In the step of deriving the maximum COP by adjusting the operation value of the control configuration,

Comparing the basic COP and the modified COP, when the modified COP is high, a new modified COP is calculated by dividing the operating heat of the inverter compressor by one step, reducing the rotation speed of the fan by one step, and dividing the heat supply by the power consumption. It is further included;

And comparing the basic COP with the modified COP and repeatedly performing the same until the basic COP is high.
The method of claim 1,

The control configuration further includes a receiver valve for controlling the amount of refrigerant in the system,

And an opening amount of the receiver valve is included in the operation value of the control configuration.
The method of claim 13,

In the step of deriving the maximum COP by adjusting the operation value of the control configuration,

Operating the compressor, the fan and the receiver valve at a basic operation value, and calculating a basic COP by dividing the supply heat by the power consumption;

Increasing the operating frequency of the inverter compressor by one step, lowering the rotational speed of the fan by one step, and calculating a modified COP by dividing the supply heat by the power consumption;

Comparing the basic COP and the modified COP, when the basic COP is high, the basic COP is operated at the basic operation value, the operation frequency of the inverter compressor is decreased by one step, the rotational speed of the fan is increased by one step, and the supply heat amount is consumed. Dividing by and calculating a new modified COP;

Control method of an air conditioning system, characterized in that it further comprises.
The method of claim 14,

In the step of deriving the maximum COP by adjusting the operation value of the control configuration,

When a new modified COP is calculated and the basic COP is high by comparing the modified COP with the basic COP,

Increasing the opening amount of the receiver valve by one step and dividing the supply heat amount by the power consumption to calculate a new modified COP;

Comparing the basic COP with the modified COP and operating at the basic operation value when the basic COP is high, calculating a new modified COP by dividing the opening amount of the receiver valve by one step and dividing the supply heat by the power consumption; And

Comparing the basic COP with the modified COP and storing the basic COP as a maximum COP when the basic COP is high;

Control method of an air conditioning system, characterized in that it further comprises.