KR102122592B1 - Control method of air-conditioning system - Google Patents

Abstract

The present invention relates to a control method of an air conditioning system. In the control method of the air conditioning system according to the spirit of the present invention, a step of inputting power and a set temperature, measuring outdoor temperature, indoor temperature and outdoor humidity, the set temperature, the outdoor temperature, the indoor temperature and the outdoor humidity The required heat amount is determined according to the steps, the plurality of control components are initially operated to provide the same amount of heat supplied as the required amount of heat, the initial heat of operation is calculated by dividing the amount of heat supplied by the power consumption, and the operation value of the control component The step of adjusting the maximum COP is included. At this time, the control configuration includes an inverter compressor and a fan, and the operating value of the control configuration includes the operating frequency of the inverter compressor and the rotational speed of the fan.

Description

Control method of air conditioning system {CONTROL METHOD OF AIR-CONDITIONING SYSTEM}

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

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

At this time, the predetermined space may be variously proposed according to a place where the air conditioning system is used. For example, when the air conditioning system is used in a home or office, the predetermined space may be an indoor space in a house or building. In addition, when the air conditioning system is used in a vehicle, the predetermined space may be a boarding space for people to board.

The air conditioning system is provided with an indoor unit disposed in the predetermined space and an outdoor unit connected to form a refrigerant cycle with the indoor unit. Such an air conditioning system can provide harmonized air to provide convenience to the user.

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

(1) 1st precedent literature: Patent Publication No. 10-2015-0097174, remote control unit of air conditioning apparatus and air conditioning apparatus including the same

(2) 2nd Prior Literature: Patent No. 10-1203559, air conditioning system capable of group control and its operation method

These prior documents provide air harmonized to the user by controlling the air conditioning system. At this time, the first prior document and the second prior document are controlled such that various control configurations are operated in accordance with the input set temperature. It can be understood that it is controlled to have a maximum COP in which power consumption is minimized according to a value stored by an experiment.

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

Accordingly, there is a problem that the air conditioning system is operated to consume a relatively large amount of power. In addition, there is a problem in that the efficiency is changed according to the installation conditions and the reliability of the user is lowered.

The present invention provides a control method of an air conditioning system operated to always have a maximum COP regardless of the installation location and installation conditions.

In addition, the inverter compressor and the fan are controlled in stages according to input conditions to derive an operation state having the maximum COP, and a control method of an air conditioning system operated to have the maximum COP is provided.

In the control method of the air conditioning system according to the spirit of the present invention, a step of inputting power and a set temperature, measuring outdoor temperature, indoor temperature and outdoor humidity, the set temperature, the outdoor temperature, the indoor temperature and the outdoor humidity The required heat amount is determined according to the steps, the plurality of control components are initially operated to provide the same amount of heat supplied as the required amount of heat, the initial heat of operation is calculated by dividing the amount of heat supplied by the power consumption, and the operation value of the control component The step of adjusting the maximum COP is included. At this time, the control configuration includes an inverter compressor and a fan, and the operating value of the control configuration includes the operating frequency of the inverter compressor and the rotational speed of the fan.

In addition, in the step of adjusting the operation value of the control configuration to derive the maximum COP, the control configuration is operated with 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 The operation may be performed by changing from the basic operation value to the modified operation value, and calculating the corrected COP by dividing the amount of heat supplied 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 with the basic operation value, and when the modified COP is high, the control configuration is operated with the modified operation value. Steps may be included.

According to the present invention, there is an advantage that the air conditioning system can be operated to always have the maximum COP.

Accordingly, power consumed by the operation of the air conditioning system is minimized.

In addition, there is an advantage that the operation with the maximum COP can be immediately performed by storing the operation state with the maximum COP.

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

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 the basic control flow of the air conditioning system according to an embodiment of the present invention.
4 is a view showing a control flow from which the maximum COP of the air conditioning system according to the first embodiment of the present invention is derived.
5 is a view showing a control flow from which the maximum COP of the air conditioning system according to the second embodiment of the present invention is derived.
6 is a view showing a control flow from which the maximum COP of the air conditioning system according to the third embodiment of the present invention is derived.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. It should be noted that in adding reference numerals to the components of each drawing, the same components have the same reference numerals as possible even though they are displayed on different drawings. In addition, in describing embodiments of the present invention, when it is determined that detailed descriptions of related well-known configurations or functions interfere with understanding of the embodiments of the present invention, detailed descriptions thereof will be omitted.

In addition, in describing the components of the embodiments of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only for distinguishing the component from other components, and the nature, order, or order of the component is not limited by the term. When a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected to or connected to the other component, but another component between each component It should 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. At least one outdoor unit and at least one indoor unit may be provided in the air conditioning system 10. Hereinafter, for convenience of description, each configuration forming a refrigerant cycle will be described without being classified as an outdoor unit or an indoor unit.

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 an outdoor space to exchange heat between outdoor air and refrigerant. In addition, the air conditioning system 10 further includes a fan 30 installed on one side of the outdoor heat exchanger 11. By the operation of the fan 30, outdoor air may be forced convection to exchange heat 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 with a constant compression capacity and an inverter compressor 20 with a variable compression capacity.

The indoor heat exchanger 13 may be disposed in an indoor space to exchange heat between indoor air and refrigerant. At this time, the indoor space may be understood as a space in which the air conditioning system 10 is installed to provide harmonized air.

At this time, the indoor heat exchanger 13 may be provided in plural. Each indoor heat exchanger 13 may be disposed in different spaces, and the air conditioning system 10 may harmonize 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 forcibly convecting 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 may be provided in a number corresponding to the indoor heat exchanger 13 provided in plural, and may be installed on one side of each indoor heat exchanger 13. The indoor expansion valve 15 is operated to selectively block refrigerant flowing into each indoor heat exchanger 13, depending on whether the indoor heat exchanger 13 is operated.

In addition, the air conditioning system 10 includes the accumulator 16 for filtering the liquid refrigerant among the refrigerant flowing toward the compressor 12 and the flow direction of the refrigerant discharged from the compressor 12 through the outdoor heat exchange. A flow conversion unit 17 for selectively converting to the group 11 or the indoor heat exchanger 13 is further included.

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

In detail, when the air conditioning system 10 is heated, 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 completely opened and the outdoor expansion valve 14 is partially opened.

Therefore, the refrigerant that has passed through the indoor heat exchanger 13 passes through the indoor expansion valve 15 without changing the 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 operated in cooling, 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 completely opened, and the indoor expansion valve 15 is partially opened.

Therefore, the refrigerant that has passed through the outdoor heat exchanger (11) passes through the outdoor expansion valve (14) without changing the state and expands while passing through the indoor expansion valve (15) and then flows into the indoor heat exchanger (13). You can.

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. Specifically, the refrigerant amount control unit includes a receiver 18 for storing at least a portion of the refrigerant circulating in the refrigeration cycle, and a receiver valve 40 for adjusting the amount of refrigerant flowing into the receiver 18.

The receiver 18 is understood as a device capable of storing at least a portion of the refrigerant circulating through the air conditioning system 10, such as a tank in which the refrigerant is accommodated. The receiver valve 40 may be installed on one side of the receiver 18 to control the amount of refrigerant stored in the receiver 18.

In FIG. 1, the receiver valve 40 is illustrated as being installed only on the inflow side of the receiver 18, but the receiver valve 40 may be installed in various positions and shapes. 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).

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

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

2, the air conditioning system 10 according to the spirit of the present invention is provided with a control unit 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 control unit 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 to which ON/OFF of the air conditioning system 10 is input, and a set temperature input unit 51 to which a set temperature required for the conditioning space is input.

In addition, even if 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. Further, the user input units 50 and 51 may further include a configuration in which various modes are input.

The measurement units 52, 53, and 54 may be understood as a configuration in which various pieces of information related to the harmonized space are measured. The measurement units 52, 53, and 54 include an outdoor temperature sensor 52, an indoor temperature sensor 53, and an indoor humidity sensor 54.

The outdoor temperature sensor 52 may be installed on 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 on the suction side of the indoor heat exchanger 13 to measure indoor temperature and indoor humidity, respectively.

The control unit 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 in each step.

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

In addition, for example, the first step of the fan 30 is 700 RPM, and may be increased by 50 RPM for each step. In addition, the first step of the receiver valve 40 may be a state in which the refrigerant flowing into the receiver 18 is completely blocked when the opening amount is 0.

In addition, the air conditioning system 10 includes a memory unit 55 in which various data are stored. Experimental operating values related to the operation of the air conditioning system 10 may be stored in the memory unit 55. For example, an operation value in which the air conditioning system 10 is operated to have a maximum COP under a predetermined condition may be stored.

At this time, COP (Coefficient Of Performance) can be understood as the heating and cooling 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 = amount of heat supplied/power consumed). 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 the 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 location, the operation having the maximum COP may not be performed with the operation values stored in the memory unit 55.

Accordingly, the present invention controls the air conditioning system 10 to operate with the maximum COP no matter where it is installed. Hereinafter, a control method of the air conditioning system 10 will be described in detail.

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

As shown in FIG. 3, power 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, the outdoor temperature, the indoor temperature and the outdoor humidity are measured (S20). As described above, it is measured through the outdoor temperature sensor 52, the indoor temperature sensor 53, and the indoor humidity sensor 54, and information about it can be transmitted.

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

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

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

In addition, the amount of heat supplied is calculated by subtracting the supercooled enthalpy from the discharge enthalpy in the case of heating operation, and is calculated by subtracting the supercooled enthalpy from the suction enthalpy in the case of cooling operation. Such calculation is performed in a general air conditioning system, and detailed description is omitted.

Then, it is checked whether the amount of heat supplied is equal to the amount of heat requested (S50). This process may be repeatedly performed as it should be premised in the operation of the air conditioning system 10. That is, for convenience of description, the corresponding process has been described only once, but continuously checks whether the supply heat amount and the required heat amount are the same while the air conditioning system 10 is operating.

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

In addition, it can be recognized that the difference between the amount of heat supplied and the amount of heat required is within a predetermined range. For example, it is determined that the difference between the amount of heat supplied and the amount of heat required is within 2%.

In addition, it can be confirmed whether the air conditioning system 10 is stably operated. Whether the air conditioning system 10 is stably operated is determined by whether the refrigerant is stable.

That is, it is determined that the refrigerant is stable when the evaporation pressure, condensation pressure, suction temperature, and discharge temperature of the refrigerant are not adjusted. For example, when the evaporation pressure, condensation pressure, suction temperature, and discharge temperature of the refrigerant are not adjusted for 3 minutes or more, it can 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 in 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 is omitted and the control configuration can be operated at the maximum operation value.

Hereinafter, an embodiment in which the air conditioning system 10 is operated to derive the maximum COP will be described in detail in FIGS. 4 to 6.

4 is a view showing a control flow from which the maximum COP of the air conditioning system according to the first embodiment of the present invention is derived.

As shown in FIG. 4, the air conditioning system 10 is operated with a basic operation value (S601). At this time, the initial operation value may be included in the basic operation value. That is, when this 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 power consumed (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). At this time, the changed operation value is called a modified operation value. That is, the control configuration is changed from the basic operation value to a modified operation value and operated.

Then, the correction COP is calculated by dividing the amount of heat supplied by the power consumed (S604). At this time, the supply heat amount is the same value as the required heat amount determined according to the input, so that the basic COP and the modified COP vary depending on 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 with the basic operation value, and when the modified COP is high, the control configuration is operated with the modified operation value.

That is, when the basic COP is high, the control configuration is operated again with the basic operation value (S601). Then, the air conditioning system 10 is operated with a new correction operation value (S602), and a new correction COP can be calculated (S603) and compared with the basic COP (S604).

On the other hand, when the correction COP is high, the control configuration continues to operate with the correction operation value. Then, the basic operation value is changed to the modified operation value and stored (S607). That is, the modified operation value becomes the 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. Then, the basic COP is calculated again by dividing the amount of heat supplied by power consumption (S602).

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

That is, the air conditioning system 10 performs steps S601 to S605 repeatedly to derive the maximum COP. At this time, whether or not the maximum COP can be determined by comparing the basic COP and the modified COP when the basic COP is higher than a predetermined number of times (S606). At this time, 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 configuration affecting the COP value of the air conditioning system 10 is limited, and the operation value of the control configuration 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 configuration and the control values of the control configuration will be described in detail.

5 is a view showing a control flow from which the maximum COP of the air conditioning system according to the second embodiment of the present invention is derived.

In FIG. 5, the case where the inverter compressor 20 and the fan 30 are provided in 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, and the operating 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 X stages (X = A, B) in the first stage. Hereinafter, for convenience of description, the operation values of the inverter compressor 20 and the fan 30 are numerically limited. The numerical range is 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 step of the fan 30 is 700RPM, and is increased by 50RPM for each step.

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

For example, it is assumed that the initial operation value is the sixth step of the inverter compressor 20 and the third step 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.

Then, the air conditioning system 10 is operated by changing the operation value of the control configuration. First, the operating 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 described above, the inverter compressor 20 and the fan 30 are regulated in different directions to maintain the supply capacity and to stabilize the system.

That is, the inverter compressor 20 is changed to the seventh step, and the fan 30 is changed to the second step to operate. Then, the correction COP is calculated by dividing the amount of heat supplied by the power consumed (S614). Then, the basic COP and the modified COP are compared (S615).

When the correction COP is high, the control configuration continues to operate with the correction operation value. This can be understood that the COP is increased by increasing the operation value of the inverter compressor 20 and decreasing the operation value of the fan 30.

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

Then, the air conditioning system 10 again increases the operating frequency of the inverter compressor 20 by one step, and lowers the rotational speed of the fan 30 by one step (S613). Accordingly, the inverter compressor 20 is operated in the eighth step, and the fan 30 is operated in the first step.

That is, it is possible to continuously increase or decrease the operation value of the control configuration in the direction in which the COP increases. This can be continued until the COP is no longer raised or is outside the range of ascent and descent. In general, since the control range of the control configuration is broadly specified, control is determined according to a change in the COP value. Therefore, in FIG. 5, the case where the control configuration is outside the range of the rising and falling is omitted and illustrated.

Meanwhile, when the basic COP is high, the control configuration is operated again with the basic operation value (S621). That is, the inverter compressor 20 is changed to the sixth step, and the fan 30 is changed to the third step to operate. It can be understood that the operation value of the inverter compressor 20 is increased, and the COP is lowered by changing the operation value of the fan 30 to be lowered.

Therefore, the operating frequency of the inverter compressor 20 is lowered 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 different direction than before.

That is, the inverter compressor 20 is changed to the fifth stage, and the fan 30 is changed to the fourth stage to operate. Then, the correction COP is calculated by dividing the amount of heat supplied by the consumed power (S624), and the basic COP and the modified COP are compared (S625).

When the correction COP is high, the control configuration continues to operate with 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 can be understood that the operation value of the inverter compressor 20 is lowered, and the COP is increased by changing the operation value of the fan 30 to increase.

Then, the basic operation value is changed to the modified 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 a basic operation value.

Then, the air conditioning system 10 again lowers the operating 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 operating value of the control configuration may be continuously increased or decreased 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 operation value of the inverter compressor 20 is lowered, and the change to increase the operation value of the fan 30 is 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.

Accordingly, the operation values of the inverter compressor 20 and the fan 30 are no longer changed, and the basic COP is stored as the maximum COP (S630). As such, the air conditioning system 10 may derive the maximum COP by increasing or decreasing the operation values of the inverter compressor 20 and the fan 30.

6 is a view showing a control flow from which the maximum COP of the air conditioning system according to the third embodiment of the present invention is derived.

6, the case where the receiver valve 40 is included in the control configuration will be described. In addition, the opening value of the receiver valve 40 is included in the operating value of the control configuration, and the operating 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.

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 operation value may correspond to an operation 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.

Therefore, the air conditioning system 10 can derive the maximum COP by changing the operation values of the inverter compressor 20, the fan 30, and the receiver valve 40. At this time, the operating values of the inverter compressor 20 and the fan 30, which significantly affect the COP value, may be adjusted first, and the operating values 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 correction COP is calculated by dividing the amount of heat supplied by the power consumed (S634). Then, the basic COP and the modified COP are compared (S635).

When the correction COP is high, the control configuration continues to operate with the correction operation value. It can be understood that the COP is increased by changing the opening amount of the receiver valve 40 to increase.

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

Meanwhile, when the basic COP is high, the control configuration is operated again with the basic operation value (S641). It can be understood that the change in the opening amount of the receiver valve 40 is increased to lower 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. Then, the modified COP is calculated by dividing the amount of heat supplied by the consumed power (S644), and the basic COP and the modified COP are compared (S645).

When the correction COP is high, the control configuration continues to operate with the correction operation value. It can be understood that the COP is increased by changing the opening amount of the receiver valve 40 to decrease. Then, 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 COP is raised.

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

Therefore, the opening amount of the receiver valve 40 is no longer changed, and the basic COP is stored as the maximum COP (S650). In this way, the air conditioning system 10 can derive the maximum COP by raising or lowering the operating values of the inverter compressor 20, the fan 30, and the receiver valve 40.

10: air conditioning system 20: inverter compressor
30: fan 40: receiver valve
50: power supply unit 51: set temperature input unit
52: outdoor temperature sensor 53: indoor temperature sensor
54: indoor humidity sensor 55: memory unit
100: control unit

Claims (15)

Inputting power and a set temperature;
Measuring outdoor temperature, indoor temperature and outdoor humidity;
Determining the required amount of heat according to the set temperature, the outdoor temperature, the indoor temperature and the outdoor humidity;
A step in which a plurality of control components are initially operated to provide a supply heat amount equal to the required heat amount;
Dividing the amount of heat supplied by power consumption and calculating an initial COP; And
Including the step of adjusting the operation value of the control configuration to derive the maximum COP;
The control configuration includes an inverter compressor and a fan,
The operating value of the control configuration includes the operating frequency of the inverter compressor and the rotational speed of the fan,
In the step of deriving the maximum COP by adjusting the operation value of the control configuration,
The control configuration is operated at a basic operation value, and the basic COP is calculated by dividing the amount of heat supplied by power consumption; And
A step in which the control configuration is changed from the basic operation value to a modified operation value and operated, and a correction COP is calculated by dividing the amount of heat supplied by power consumption;
Control method of the air conditioning system, characterized in that it is included. delete According to claim 1,
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; And
When the basic COP is high, the control configuration is operated with the basic operation value, and when the modified COP is high, the control configuration is operated with the modified operation value;
Control method of the air conditioning system, characterized in that it is further included. The method of claim 3,
In the step of deriving the maximum COP by adjusting the operation value of the control configuration,
When the correction COP is high, the control configuration is operated with the correction operation value,
The method of controlling an air conditioning system further comprises the step of changing the basic operation value to the modified operation value and storing it. The method of claim 4,
In the step of deriving the maximum COP by adjusting the operation value of the control configuration,
Changing the basic operation value to the modified operation value and storing the control configuration to operate with the new basic operation value, and calculating the new basic COP by dividing the supply heat amount by power consumption; And
The operation of the control configuration being changed from the basic operation value to a new correction operation value, and calculating a new correction COP by dividing the amount of heat supplied by power consumption;
Control method of the air conditioning system, characterized in that it is included. The method of claim 5,
When the basic COP is higher than a predetermined number of times by comparing the basic COP and the modified COP,
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,
When the same set temperature, the outdoor temperature, the indoor temperature and the outdoor humidity are input, the control method of the air conditioner characterized in that the control configuration is initially operated with the maximum operation value. According to claim 1,
The control configuration is operated at a basic operation value, and the step of calculating the basic COP by dividing the supply heat amount by the power consumption is the inverter compressor and the fan operating at the basic operation value, and dividing the supply heat amount by the power consumption. Corresponds to the step where is calculated,
The operation in which the control configuration is changed from the basic operation value to the modified operation value, and the correction COP is calculated by dividing the amount of heat supplied by power consumption increases the operating frequency of the inverter compressor by one level and increases the rotational speed of the fan by one. Lowering the step, and dividing the amount of heat supplied by the power consumption, the control method of the air conditioning system, characterized in that corresponding to the step of calculating the correction COP. 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 and the modified COP;
If the basic COP is high, the control configuration is operated with the basic operation value; And
Lowering the operating frequency of the inverter compressor by one step, increasing the rotational speed of the fan by one step, and dividing the supply heat by power consumption to calculate a new modified COP;
Control method of the air conditioning system, characterized in that it is further included. The method of claim 9,
In the step of deriving the maximum COP by adjusting the operation value of the control configuration,
A new modified COP is calculated, and comparing the basic COP and the modified COP; And
If the basic COP is high, storing the basic COP as the maximum COP; The control method of the air conditioning system further comprises. The method of claim 10,
In the step of deriving the maximum COP by adjusting the operation value of the control configuration,
When the modified COP is high by comparing the basic COP and the modified COP, the operating frequency of the inverter compressor is lowered by 1 level, the rotational speed of the fan is increased by 1 level, and the amount of heat supplied is divided by power consumption to calculate a new modified COP. Becoming; is further included,
The control method of the air conditioning system, characterized in that it is repeatedly performed until the basic COP is high by comparing the basic COP and the modified COP. The method of claim 9,
In the step of deriving the maximum COP by adjusting the operation value of the control configuration,
When the modified COP is high by comparing the basic COP and the modified COP, the operating frequency of the inverter compressor is increased by one step, the rotational speed of the fan is decreased by one step, and the amount of heat supplied is divided by power consumption to calculate the new modified COP. Becoming; is further included,
The control method of the air conditioning system, characterized in that it is repeatedly performed until the basic COP is high by comparing the basic COP and the modified COP. According to claim 1,
The control configuration further includes a receiver valve for controlling the amount of refrigerant in the system,
The control method of the air conditioning system, characterized in that the operating value of the control configuration includes the opening amount of the receiver valve. The method of claim 13,
In the step of deriving the maximum COP by adjusting the operation value of the control configuration,
A step in which the compressor, the fan, and the receiver valve are operated at a basic operation value, and a basic COP is calculated by dividing the amount of heat supplied by power consumption;
A step in which the operation frequency of the inverter compressor is increased by one step, the rotational speed of the fan is decreased by one step, and the corrected COP is calculated by dividing the amount of heat supplied by power consumption;
When the basic COP is high by comparing the basic COP and the modified COP, the basic COP is operated at the basic operation value, the operating frequency of the inverter compressor is lowered by 1 stage, the rotational speed of the fan is increased by 1 stage, and the amount of heat supplied is consumed. Dividing by calculating a new modified COP;
Control method of the air conditioning system, characterized in that it is further included. 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 basic COP and the modified COP,
Increasing the opening amount of the receiver valve by one step and dividing the supply heat amount by power consumption to calculate a new corrected COP;
Comparing the basic COP and the modified COP to operate with the basic operation value when the basic COP is high, lowering the opening amount of the receiver valve by one step, and dividing the supply heat amount by power consumption to calculate a new modified COP; And
Comparing the basic COP with the modified COP, if the basic COP is high, storing the basic COP as a maximum COP;
Control method of the air conditioning system, characterized in that it is further included.

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