KR20120016765A - A method for controlling air conditioning system - Google Patents

Abstract

PURPOSE: A control method of an air conditioning system is provided to reduce electric charge occurred by an air conditioning system because an operation of the air conditioning system is controlled according to an electric charge time zone. CONSTITUTION: A control method of an air conditioning system is as follows. Information related to a power rate peak time system including a power rate peak time zone is received(210). Information related to a carbon dioxide concentration and carbon dioxide density variation of indoor are collected by a carbon dioxide detecting sensor(220). An operation mode of an air conditioning system reducing the carbon dioxide concentration of indoor is selected based on the received and collected information(230). The air conditioning system operates according to the selected operation mode(240).

Description

Control method of air conditioning system {A METHOD FOR CONTROLLING AIR CONDITIONING SYSTEM}

The present invention relates to a control method of an air conditioning system, and in particular, by controlling the operation of the air conditioning system according to the time period of the electricity tariff peak time system air conditioning that can reduce the electric charges generated by the operation of the air conditioning system It relates to a control method of the system.

Electric power for the operation of electrical appliances such as home appliances used in homes or office equipment used in offices is generally supplied through a power plant operated by KEPCO, a transmission line, and a wiring line. It is characteristic.

It has the characteristics of a central power source, not a distributed power source, a radial structure that spreads from the center to the periphery, and is characterized by a unidirectional supplier center rather than a consumer center.

In addition, the technology base is analog or electromechanical, there is a problem that must be restored manually in case of an accident, and the equipment must also be restored manually.

The price information of electricity was not only known in real time, but was limitedly known through the power exchange, and the price system also included electricity price peak time zone, which is a time-varying time and the most expensive time period. Although some peak hours are being implemented in each sector, there is a problem that incentives such as incentives to consumers through price changes cannot be used.

In order to solve these problems and improve energy efficiency, research on smart grids (intelligent power grids) has been actively conducted recently.

The smart grid refers to the next generation power system and its management system that are realized through the convergence and complex of modern power technology and information communication technology.

As mentioned above, the current grid is a centralized, producer-controlled, vertical, centralized network, whereas the smart grid is less focused on suppliers and horizontal, collaborative to enable interaction between consumers and suppliers. It is an enemy, decentralized network.

The smart grid is sometimes called the "energy internet" because all electrical devices, power storage devices and distributed power supplies are networked to enable interaction between consumers and suppliers.

On the other hand, when the use of electrical appliances in real time to determine the electricity bill, to recognize the peak time of the electricity bill, and to avoid the use of electrical appliances at that time as much as possible in the electrical appliances and control method that can save the electricity bill The need has been raised.

In addition, in the field of indoor air conditioning, an air conditioning system that reduces indoor carbon dioxide concentration below a certain level (1000 ppm) has been used to improve indoor air quality, but a ventilation mode of an air conditioning system that reduces indoor carbon dioxide concentration In addition, the air cleaning mode has a longer operating time and considerable power consumption than other home appliances, so the use of the air cleaning mode has been raised as much as possible. At the same time, there has been a need to improve the air quality so that indoor occupants are not affected by indoor living due to excessive carbon dioxide concentration.

An object of the present invention is to provide a control method of an air conditioning system that can reduce the electric charge generated by the air conditioning system by controlling the operation of the air conditioning system according to the electric charge time zone.

In addition, it is an object of the present invention to provide a control method of the air conditioning system to reduce the concentration of carbon dioxide in the room to reduce the electric bill generated by the air conditioning system and at the same time there is no inconvenience for people living indoors.

An object of the present invention for achieving the object of the present invention, the electricity rate is variable according to the time zone and the electricity rate information receiving step for receiving information on the electricity rate peak time system including the electricity rate peak time zone; A concentration information collection step of collecting information on a carbon dioxide concentration and a change rate of carbon dioxide concentration in a room with a carbon dioxide sensor; An operation mode selection step of selecting an operation mode of the air conditioning system for reducing the carbon dioxide concentration in the room based on the information received in the electricity rate information receiving step and the information collected in the concentration information collecting step; And an operation step of operating an air conditioning system according to the operation mode selected in the operation mode selection step.

According to the problem solving means of the present invention, by controlling the operation of the air conditioning system in accordance with the electricity bill time, there is an effect that can reduce the electric charge generated by the air conditioning system, and at the same time the indoor living room There is an effect that can reduce the concentration of carbon dioxide in the room so that there is no inconvenience. Therefore, the present invention has the effect of providing the user or indoor occupants with the economic benefits of reducing the electricity bill and the comfort of indoor living such as the improvement of the air quality.

1 is a schematic diagram of a smart grid associated with the present invention,
2 is a schematic diagram of a power supply network system according to the present invention;
3 is a schematic configuration diagram of an air conditioning system according to the present invention;
4 is a flowchart illustrating a control method of the air conditioning system according to the present invention;
5A to 5C are graphs of electric charges received in the electric charge information receiving step according to the present invention and graphs of carbon dioxide concentration before and after operating the air conditioning system in the preliminary operation mode,
6 is a detailed flowchart of the operation mode selection step according to the first embodiment of the present invention,
7 is a detailed flowchart of the operation mode selection step according to the second embodiment of the present invention,
8 is a detailed flowchart of the operation step when the operation mode of the air conditioning system executed in the operation step of the present invention is a normal operation mode,
9 is a detailed flowchart of the operation step when the operation mode of the air conditioning system executed in the operation step of the present invention is a preliminary operation mode.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. For reference, in describing the embodiments of the present invention, if it is determined that a detailed description of a related known function or configuration may make the gist of the present invention unclear, the detailed description thereof will be omitted.

1 is a schematic diagram of a smart grid, a smart grid includes a power plant that generates power through thermal power, nuclear power or hydropower, and a solar power plant and a wind power plant using solar or wind power as renewable energy. .

In addition, the thermal power plant or nuclear power plant or hydroelectric power station transmits power to a power station through a transmission line, and the power station sends electricity to a substation so that the electricity is distributed to a demand destination such as a home or an office.

The electricity produced by the renewable energy is also sent to substations to be distributed to each customer. Then, the electricity transmitted from the substation is distributed to the office or each home via the power storage device.

Even in homes that use the Home Area Network (HAN), it is possible to supply electricity by producing electricity by itself through fuel cells mounted on solar power or PHEV (Plug-in Hybrid Electric Vehicle). The remaining electricity can also be sold outside.

In addition, the smart measuring device is installed in the office or home to identify the real-time power and electricity bills used at each demand source. Through this, the user recognizes the amount of electricity and the electricity bill currently used, and according to the situation, the power consumption or the electricity bill according to the situation. Measures to reduce the

On the other hand, since the power plant, power station, storage device and the source of demand are bidirectional communication, only the unilaterally receive electricity from the source of demand, and notify the storage, power station, and power plant of the demand source to produce electricity according to the situation of the source of demand. Electric distribution can be performed.

Meanwhile, in the smart grid, an energy management system (EMS), which is responsible for real-time power management and real-time prediction of power consumption, and an advanced metering infrastructure (AMI), which measures power consumption in real time, are pivotal. Play the role of person.

Here, the measuring device under the smart grid is a basic technology for integrating consumers on the basis of open architecture, and provides consumers with the ability to efficiently use electricity, and provides power providers with the ability to operate the system efficiently by detecting problems in the system. do.

Here, the open architecture, unlike a general communication network, refers to a standard that allows all electric devices to be connected to each other regardless of which manufacturer the electric device is manufactured in a smart grid system.

Thus, the instrumentation used in the smart grid enables a consumer friendly efficiency concept such as "Prices to Devices."

That is, the real-time price signal of the electric power market is relayed through the energy management device (EMS) installed in each home, and the energy management device (EMS) communicates with and controls each electric device so that the user can control the energy management device (EMS). By recognizing the power information of each electric device and performing the power information processing such as the amount of power consumption or the electric charge limit setting based on the power information, energy and cost can be saved.

The energy management device (EMS) is a local energy management device (EMS) used in the office or at home, and the local energy management device (EMS) by performing bidirectional communication to process the information collected from the local energy management device (EMS) It is preferably composed of a central energy management device (EMS).

Real-time communication of power information between suppliers and consumers can be realized in the smart grid, realizing “real-time grid response”, thereby reducing the high cost of meeting peak demand.

2 illustrates a power supply network system 10 in a home, which is a major consumer of a smart grid.

The power supply network system 10 is a measuring device (smart meter) 20 that can measure in real time the power and electricity bills, power consumption peak time intervals or electricity rate peak time periods supplied to each home, and the measurement device (Smart Meter) 20 is provided with an energy management device (EMS) 30 is connected to a plurality of electrical devices, such as home appliances, and controls their operation.

Here, the energy management device (EMS) 30 has a screen 31 for displaying the current state of electricity consumption and the external environment (temperature, humidity), and provides an input button 32 or the like which can be operated by a user. It is preferably provided in the form of a terminal provided.

The energy management device (EMS) 30 is again connected to a network such as a refrigerator 101, a washing machine and a dryer 102, an air conditioning system 120, a TV 105, or a cooking appliance 104. It is connected to electrical appliances and makes bidirectional communication with them.

Communication inside the house may be via wireless or wired such as PLC (Power Line Communication).

In addition, it is preferable that the electrical appliances are arranged to be connected to other electrical appliances so that communication is possible.

3 is a schematic configuration diagram or layout view of an air conditioning system 120 according to the present invention. The air conditioning system 120 generally performs a function of controlling the temperature or humidity of the room. Hereinafter, the air conditioning system 120 operates in a ventilation manner or an air cleaning method to reduce the concentration of carbon dioxide in the room. The focus will be on performing the function.

As shown in FIG. 3, the air conditioning system 120 according to the present invention includes an indoor unit 121 that sucks indoor air and carbon dioxide and supplies indoor fresh air or air from which carbon dioxide has been removed from the indoor air to the room, A heat exchanger 124 disposed between the air supply pipe 122 and the exhaust pipe 123 connected to the indoor unit 121, and arranged between the air supply pipe 122 and the exhaust pipe 123 to perform heat exchange between indoor air and outdoor air; The circulation pipe 125 is connected between the air supply pipe 122 and the exhaust pipe 123 by a three-way valve, and includes a filter unit 126 arranged in the middle of the circulation pipe 125.

In addition, the air conditioning system 120 according to the present invention, the bi-directional communication with the air conditioning system 120 to measure in real time the power and electricity bills, power consumption peak time intervals or electric charge peak time zones supplied to each home And an energy management system (EMS) 30 that communicates bidirectionally with a measuring device (smart meter) 20. In addition, the air conditioning system 120 according to the present invention includes a carbon dioxide sensor 127 that measures the concentration of carbon dioxide in the indoor air and calculates a rate of change of the concentration of carbon dioxide in the room over time. 127 is connected to communicate with the indoor unit or the energy management device (30).

The energy management device 30 determines that the concentration of carbon dioxide in the room measured by the carbon dioxide sensor 127 is equal to or greater than a predetermined concentration (for example, 1000 ppm), thereby reducing the concentration of carbon dioxide in the room. When operating in the ventilation mode, the indoor air is sucked through the indoor unit 121, the indoor air is sucked out to the outside through the exhaust pipe 123, the external fresh air supplied through the air supply pipe 122 It is supplied to the room through the indoor unit 121. At this time, in order to maintain the indoor humidity and temperature, the heat exchanger 124 is disposed between the air supply pipe 122 and the exhaust pipe 123 to exchange heat between the indoor air and the outdoor air.

The energy management device 30 determines that the concentration of carbon dioxide in the room measured by the carbon dioxide sensor 127 is equal to or greater than a predetermined concentration (for example, 1000 ppm), thereby reducing the concentration of carbon dioxide in the room. When operating in the ventilation mode, the indoor unit 121 sucks the air in the room, the sucked air is the filter unit 126 for adsorbing or filtering carbon dioxide and dust or other harmful substances contained in the air of the sucked room, etc. The air passing through the filter unit 126 passes through the exhaust pipe 123 and is supplied back to the room through the indoor unit 121. Here, the filter unit 126 includes a prefilter, an antibacterial filter, a HEPA filter, a deodorization filter, and a carbon dioxide adsorption filter. In this case, the carbon dioxide adsorption filter is preferably configured to include lithium hydroxide or soda lime having an excellent reaction efficiency with carbon dioxide, but this is illustrative and may be made of any material as long as the carbon dioxide adsorption rate is excellent.

Preferably, the switching of the ventilation mode or the air cleaning mode of the air conditioning system 120 is controlled by the selective opening and closing of the three-way valve controlled by the control unit of the energy management device 30 or the air conditioning system 120. However, this is exemplary and the present invention is not limited thereto.

4 is a flowchart of a control method 200 of an air conditioning system according to the present invention.

As shown in Figure 4, the control method 200 of the air conditioning system according to the present invention, the electricity bill information receiving step 210, the concentration information receiving step 20, the operation mode selection step 230 and the operation step 240.

In the electricity rate information receiving step 210, the energy management device 30 receives the information on the electricity rate provided by the electricity supplier (for example, the power company) through the smart meter (20). In particular, the energy management device 30 receives the information on the peak electricity tariff rate, the peak electricity tariff rate is expected to vary depending on the time of day and the electricity demand is high, so that the electricity rate is the highest value of the day The electricity tariff system includes an electric tariff peak time period (Δt _peak ), which is a time zone (see FIG. 5A).

In the concentration information collection step 220, the energy management device 30 or the indoor unit 121 collects information on the carbon dioxide concentration and carbon dioxide concentration change rate of the room through the carbon dioxide sensor 127 connected to the communication method. Regarding the carbon dioxide concentration, the "Indoor Air Quality Management Act, such as a multi-use facility" defines an allowable reference value of indoor carbon dioxide concentration as 1000 ppm, so the carbon dioxide sensor 127 measures the concentration of carbon dioxide in the room in real time and collects concentration information. The indoor carbon dioxide concentration measured at 220 is transmitted to the energy management device 30 so that the energy management device 30 operates the air conditioning system 120 to reduce the indoor carbon dioxide concentration to at least 1000 ppm or less.

In the operation mode selection step 230, the energy management device 30 is based on the information received in the electricity bill information receiving step 210 and the information collected in the concentration information collecting step 220 carbon dioxide concentration in the room Select the operating mode of the air conditioning system 120 to reduce the. The operation mode selection step according to the present invention compares or determines the current time, the concentration of carbon dioxide in the room at the present time, the rate of change of the concentration of carbon dioxide in the room at the present time, and the reference values preset in the energy management device, and at the same time save electricity costs. The operating mode of the air conditioning system is selected to improve the air quality (ie, reduce the carbon dioxide concentration). A detailed comparison process or determination process performed in the operation mode selection step 230 will be described in detail below.

In the operation step 240, the energy management device 30 operates the air conditioning system 120 in accordance with the operation mode selected in the operation mode selection step 230 to reduce the concentration of carbon dioxide in the room or the electricity bill Save electricity costs by stopping the air conditioning system in the peak time period (Δt _peak ).

5A shows a graph of the change in electricity rates over time or over time provided from a power supply. This is an exemplary graph, and the present invention is not limited thereto.

As shown in FIG. 5A, in the electricity rate information receiving step 210, the smart meter 20 receives information about a change in electricity rate over time or over time. As shown in the graph, the time period when the electric charge becomes the maximum value of the day becomes the electric charge peak time period (Δt _peak ). Information on the electric charge received by the smart meter 20 is transmitted to the energy management device 30 in a communication manner.

5B and 5C are graphs of indoor carbon dioxide concentrations measured in real time with a carbon dioxide sensor 127 disposed indoors before and after preconditioning the air conditioning system 120, respectively.

As shown in FIGS. 5B and 5C, after the electricity rate information receiving step 210, the energy management device 30 receives the electricity rate received by the smart meter 20 in the electricity rate information receiving step 210. It determines the peak time (Δt _peak) by pre-operation time (Δt _pre) of the pre-operating air conditioning system (120) before the electric charge peak times (Δt _peak) based on the information about.

The energy management device 30 according to the present invention stops the operation of the air conditioning system 120 at the start of the electric charge peak time period Δt _peak received in the electric charge information receiving step 210 in order to save electric charges. because, the air conditioning system 120 is the electrical charge peak times (Δt _peak) from electrical to pre-reduce the carbon dioxide concentration in the room prior to the concentration of the room carbon dioxide 1000 ppm electric charge peak times (Δt _peak) so as not more than Update peak times (Δt _peak) of air conditioning system 120 is not functioning and the increase of the natural carbon dioxide concentration due to respiration of jaesilja (Figure 5b reference) the electricity rate peak times (Δt _peak) before the air in order to prepare in advance in the It should be operated in clean mode or in ventilation mode.

So, before the electric charges during peak hours so as not affecting to jaesilja the living room from the (Δt _peak) (the concentration of indoor carbon dioxide so much lower than 1000 ppm (Fig. 5c Note)) electricity rates during peak times (Δt _peak) The operation mode of the air conditioning system for reducing the carbon dioxide concentration in the room is called a preliminary operation mode, and the time zone in which the air conditioning system operates in the preliminary operation mode is called a preliminary operation time period (Δt _pre ). On the contrary, the operation mode when the air conditioning system is not in the preliminary operation mode is called a normal operation mode, and the time zone during which the air conditioning system is operated in the normal operation mode is called a normal operation time zone.

In relation to the reference concentrations shown in FIGS. 5B and 5C, the second reference concentration C ₂ is 1000 ppm, which is an allowable reference value of the indoor carbon dioxide concentration prescribed in the "Indoor Air Quality Management Act, such as a multi-use facility" as described above. , The reference concentration is preset in the energy management device (30). In addition, the first reference concentration (C ₁ ) is a reference concentration preset in the energy management device, the concentration of carbon dioxide in the room due to the respiration of the occupants in the electricity rate peak time period (Δt _peak ) when the air conditioning system does not operate. Is increased naturally, the air conditioning system is operated in the ventilation mode or the air cleaning mode in advance in the preliminary operating time period (Δt _pre ) before the electric charge peak time period (Δt _peak ) in consideration of the natural carbon dioxide concentration increase. peak time start time, the carbon dioxide concentration in the room the second reference concentration _{(Δt peak) (C 2)} ( that is, 1000 ppm) the second reference level is kept to less than, and the first reference concentration (C ₁₎ (C ₂₎ Is the concentration minus the concentration _margin (ΔC _margin ). In addition, the first reference concentration C ₁ is a reference concentration at which the air conditioning system 120 starts the preliminary operation mode. That is, when the concentration of carbon dioxide in the room measured by the carbon dioxide sensor 127 in the concentration information collection step 220 is greater than or equal to the first reference concentration C ₁ , the energy management device 30 operates the air conditioning system 120. Operate in the reserve mode. Preferably, the first reference concentration (C ₁ ) is a concentration obtained by subtracting the concentration _margin (ΔC _margin ) from the second reference concentration (C ₂ ), that is, 800 ppm to 600 ppm, more preferably 700 ppm. The numerical values for the first reference concentration C ₁ and the second reference concentration C ₂ are exemplary, and the present invention is not limited thereto.

6 is a detailed flowchart of the operation mode selection step 230 according to the first embodiment of the present invention.

As shown in FIG. 6, in the operation mode selection step 230, the energy management device 30 first determines whether the current time point is a pre-operation time period Δt _pre of the air conditioning system 120 (231). When the energy management device 30 determines that the current time point is not the preliminary operating time period Δt _pre of the air conditioning system 120 in the current time determination process 231, the energy management device 30 performs air conditioning. The operation mode of the system 120 is selected as the normal operation mode, and the operation of the air conditioning system is controlled in operation 240, which will be described later, according to the normal operation mode (234).

On the contrary, when the energy management device 30 determines that the current time is within the preliminary operating time period Δt _pre of the air conditioning system in the current time determination process 231, the energy management device operates at the current time. It is further determined whether it is being carried out (232).

Then, when the energy management device determines that the air conditioning system is operating in the ventilation mode or the air cleaning mode to reduce the carbon dioxide concentration in the room at the present time in the process of determining whether the air conditioning system is in operation (232), The energy management device 30 selects the operation mode of the air conditioning system 120 as the normal operation mode and controls the operation of the air conditioning system 120 according to the normal operation mode in the operation step 240 to be described later (234). ).

On the contrary, when the energy management device 30 determines that the air conditioning system is not operating in the ventilation mode or the air cleaning mode at the present time in the determination process 232 of the operation of the air conditioning system 120, the The energy management apparatus 30 compares the concentration of carbon dioxide in the room at the present time collected by the carbon dioxide sensor 127 in real time in the concentration information collecting step 220 with the first reference concentration C ₁ . It is further determined whether C ₁ ) or less (233).

Subsequently, when the energy management device 30 determines that the concentration of carbon dioxide in the room at the present time is less than the first reference concentration C _{1 in} the first reference concentration comparison process 233, the energy management device is air-conditioned. The operation mode of the system is selected as the normal operation mode and the operation of the air conditioning system is controlled according to the normal operation mode in the operation step 240 which will be described later (234).

On the contrary, when the energy management device 30 determines that the carbon dioxide concentration in the room at the present time is greater than or equal to the first reference concentration C _{1 in} the first reference concentration comparison process 233, the energy management device 30. The operation mode of the air conditioning system is selected as the preliminary operation mode and controls the operation of the air conditioning system according to the preliminary operation mode in the operation step 240 to be described later (235).

As described above, the energy management device 30 is the current time determination process 231, the operation progress determination process 232 and the first reference concentration comparison process (in the operation mode selection step according to the first embodiment of the present invention) 233), the air conditioning system is not operated to reduce the indoor carbon dioxide concentration at the present time within the preliminary operating time period (Δt _pre ), and the indoor carbon dioxide concentration at the present time is the first reference concentration ( C ₁ ) If it is determined to be abnormal, a preliminary mode of operation of the air conditioning system, which allows the occupants to maintain the carbon dioxide concentration in a concentration range that does not affect indoor living in the peak period of the electricity bill, and at the same time saves the electricity bill. Select the operating mode.

7 is a detailed flowchart of the operation mode selection step 230 ′ according to the second embodiment of the present invention.

As shown in FIG. 7, in the operation mode selection step 230 ′, the energy management device 30 first determines whether the present time point is a pre-operation time period Δt _pre of the air conditioning system (231 ′). When the energy management device 30 determines that the current time point is not a _pre- operation time period Δt _pre of the air conditioning system in the current time determination process, the energy management device 30 normally determines the operation mode of the air conditioning system. Selecting the operation mode (235 '), and controls the operation of the air conditioning system in accordance with the normal operation mode in the operation steps to be described later.

On the contrary, when the energy management device 30 determines that the current time is within the preliminary operating time period Δt _pre of the air conditioning system in the current time determination process, the energy management device 30 operates at the current time. It is further determined whether it is busy (232 ').

Thereafter, the energy management device 30 is operating in the ventilation mode or the air cleaning mode to reduce the carbon dioxide concentration in the room at the present time in the process of determining whether the air conditioning system is in operation (232 '). If it is determined, the energy management device 30 selects the operation mode of the air conditioning system as the normal operation mode (235 ') and controls the operation of the air conditioning system according to the normal operation mode in the operation step to be described later.

On the contrary, when the energy management apparatus 30 determines that the air conditioning system is not operating in the ventilation mode or the air cleaning mode at the present time in the process of determining whether the air conditioning system is in operation (232 '), the energy management Device 30 is a first reference concentration (C ₁ ) compared to the first reference concentration (C ₁ ) compared to the first reference concentration (C ₁ ) of the indoor current point of time collected by the carbon dioxide sensor 127 in real time in the concentration information collection step 220 (233 ').

Subsequently, when the energy management device 30 determines that the carbon dioxide concentration in the room at the present time is less than the first reference concentration C _{1 in} the first reference concentration comparison process 233 ′, the energy management device 30 ) Selects the operation mode of the air conditioning system as the normal operation mode (235 ') and controls the operation of the air conditioning system according to the normal operation mode in the operation stage to be described later.

On the contrary, when the energy management device 30 determines that the carbon dioxide concentration in the room at the present time is greater than or equal to the first reference concentration C _{1 in} the first reference concentration comparison process 233 ′, the energy management device 30 ) Compares the change rate of the carbon dioxide concentration in the room at the present time point with the change rate of the standard concentration and further determines whether the change rate of the carbon dioxide concentration in the room at the present time point is less than the reference change rate (234 '). Here, the reference concentration change rate is the rate of change of the carbon dioxide concentration in the room in the preliminary operation time period Δt _pre , and the concentration change amount (ie, the concentration margin width) obtained by subtracting the first reference concentration C ₁ from the second reference concentration C ₂ . (ΔC _margin )) divided by the change in time in the pre-operation time zone (Δt _pre ) times the constant K.

At this time, Preferably the constant K is 0.5 to 1.

Subsequently, when the energy management device 30 determines that the concentration change rate of the carbon dioxide in the room at the present time is less than the reference concentration change rate in the reference concentration change rate comparison process 234 ′, the energy management device 30 may determine the air conditioning system. The operation mode is selected as the normal operation mode (235 ') and the operation of the air conditioning system is controlled in accordance with the normal operation mode in the operation steps to be described later.

On the contrary, when the energy management device 30 determines that the concentration change rate of the carbon dioxide in the room at the present time is greater than or equal to the reference concentration change rate in the reference concentration change rate comparison process 234 ′, the energy management device 30 may be configured as an air conditioning system. The operation mode is selected as the preliminary operation mode (236 ') and the operation of the air conditioning system is controlled in accordance with the preliminary operation mode in the operation stage to be described later.

As described above, the energy management device is a current time determination process 231 ', operation progress determination process 232', the first reference concentration comparison process 233 in the operation mode selection step according to the second embodiment of the present invention ') And the standard concentration change rate comparison process (234'), the current time is within the preliminary operating time period (Δt _pre ) and the air conditioning system is not operating to reduce the indoor carbon dioxide concentration at the present time. If the indoor carbon dioxide concentration is above the first reference concentration (C ₁ ) and at the same time it is determined that the indoor carbon dioxide concentration change rate is more than the standard concentration change rate, the occupants do not affect the indoor life in the peak period of electricity rates. A preliminary operating mode is selected as the operating mode of the air conditioning system, which maintains the carbon dioxide concentration in the concentration range and at the same time saves the electric charge.

Unlike the operation mode selection step 230 according to the first embodiment, the operation mode selection step 230 ′ according to the second embodiment further includes a reference concentration change rate comparison process 234 ′, thereby providing an energy management apparatus ( 30) can more accurately determine the case in which the air conditioning system is operated in the preliminary operation mode, so that the concentration of carbon dioxide in the room more accurately is determined as the first reference concentration (C ₁ ) or the second during the electric charge peak time period (Δt _peak ). It is possible to save electricity bills more accurately and in detail while maintaining below the reference concentration (C ₂ ). Therefore, according to the control method of the air conditioning system including the operation mode selection step 230 ′ according to the second embodiment, the control of the air conditioning system including the operation mode selection step 230 according to the first embodiment Compared to the method, the electric charge savings can be further increased.

8 is a detailed flowchart of the operation step of the air conditioning system when the operation mode of the air conditioning system executed in the operation step 240 of the present invention is a normal operation mode.

As shown in FIG. 8, when the energy management apparatus 30 selects the operation mode of the air conditioning system as the normal operation mode in the operation mode selection step 230 (230 ′), the energy management in the operation step 240. The apparatus 30 first determines whether the carbon dioxide concentration at the present time is greater than or equal to the second reference concentration C ₂ by comparing the carbon dioxide concentration at the present time with the second reference concentration C ₂ (241).

Subsequently, when the energy management device 30 determines that the carbon dioxide concentration at the present time is less than the second reference concentration C _{2 in} the second reference concentration comparison process 241 (that is, the concentration of carbon dioxide at the present time is the occupant). If it is determined that it does not affect the indoor life of the), by stopping the ventilation mode or the air cleaning mode of the air conditioning system for reducing the indoor carbon dioxide concentration (245), to prevent unnecessary generation of electricity bills.

On the contrary, when the energy management device 30 determines that the carbon dioxide concentration at the present time is greater than or equal to the second reference concentration C _{2 in} the second reference concentration comparison process 241, air conditioning is performed to reduce the carbon dioxide concentration in the room. After operating the system in the ventilation mode or the air cleaning mode, it is further determined whether the current time point is the electric charge peak time interval Δt _peak (243).

Subsequently, when the energy management device 30 determines that the current time point is the electric charge peak time period Δt _peak in the current time determination process 243, the ventilation mode of the air conditioning system for reducing the carbon dioxide concentration in the room or The air cleaning mode is stopped (245) to prevent excessive electric charges.

On the contrary, when the energy management device 30 determines that the current time point is not the electric charge peak time period Δt _peak in the current time determination process 243, the energy management device 30 determines the carbon dioxide concentration at the current time point. a first reference concentration (C ₁₎ as compared to the carbon dioxide concentration is further determined whether the current time is less than the first reference concentration (C ₁₎ (244).

Then, when the energy management device 30 determines that the carbon dioxide concentration at the present time is less than the first reference concentration C _{1 in} the first reference concentration comparison process 244 (that is, the concentration of carbon dioxide at the present time is occupied by the patient). The energy management device 30 stops the ventilation mode or the air cleaning mode of the air conditioning system for reducing the carbon dioxide concentration in the room (245). To avoid incurring charges.

On the contrary, when the energy management device 30 determines that the carbon dioxide concentration at the present time is greater than or equal to the first reference concentration C _{1 in} the first reference concentration comparison process 244, the energy management device 30 is configured as the first reference concentration. The second reference concentration comparison process 241 to the first reference concentration comparison process 244 are executed again.

9 is a detailed flowchart of the operation step 240 of the air conditioning system when the operation mode of the air conditioning system executed in the operation step 240 of the present invention is a preliminary operation mode.

As shown in FIG. 9, when the energy management apparatus 30 selects the operation mode of the air conditioning system as the preliminary operation mode in the operation mode selection step 230 (230 ′), the energy management in the operation step 240. The device 30 firstly reduces the carbon dioxide concentration in the room. The air conditioning system is operated by setting the operation mode of the air conditioning system to the ventilation mode or the air cleaning mode (246).

Thereafter, the energy management apparatus 30 has a first or more air volume sufficient to reduce the air volume of the air conditioning system at the present time during the preliminary operating time period Δt _pre to be less than the preset first reference concentration. Awareness is determined (247).

Subsequently, the energy management device 30 sets the carbon dioxide concentration in the room at the present time during the preliminary operating time period Δt _pre in the air flow determination process 247. ₁ ) When it is determined that the air flow rate is less than the second air flow amount sufficient to reduce the air flow rate, the energy management device 30 may set the air flow rate of the air conditioning system operated in the ventilation mode or the air cleaning mode to be greater than the first air flow rate currently being operated. Increase to 2 airflows (248). That is, for example, in order to reduce the carbon dioxide concentration at the present time during the preliminary operating time period Δt _pre to be less than the first predetermined reference concentration, the energy management apparatus “winds” (ie, the second air volume) the predetermined air volume. The air conditioning system should be operated, but if the air volume at the present time is "wet" or "medium" (ie, the first air volume), increase the air volume of the air conditioning system to "strong wind" to operate the air conditioning system. Let's do it.

Then, the energy management unit 30 further determines whether the current time point is within the peak time zone, electric charge or electric charge initiation time peak time (Δt _peak) of the (Δt _peak) (249).

Then, if judged to be within the energy management device 30 is the current time determination process, the current time point electric charges during peak hours in a 249 point or electrical charges during peak hours the start of the (Δt _peak) (Δt _peak), the air conditioning system By stopping the ventilation mode or the air cleaning mode of (250), to prevent excessive generation of the electricity bill in the electric charge peak time period (Δt _peak ).

On the other hand, if it is determined that the energy management device (30) the current time from the current time point decision process (249) other than electric charge peak times (Δt _peak) the start or electrical charges during peak hours of the (Δt _peak), the room In order to reduce the carbon dioxide concentration, the air conditioning system is continuously maintained in the ventilation mode or the air cleaning mode (246), and then the air volume determination process 247 and the current viewpoint judge process 249 are repeatedly performed.

Preferably, the energy management device further determines whether the carbon dioxide concentration of the current time point by comparing the carbon dioxide concentration at the current time before the present point determination process in the first reference concentration (C ₁₎ is more than the first reference concentration (C ₁₎ can do. Thereafter, when the energy management device determines that the carbon dioxide concentration at the present time is greater than or equal to the first reference concentration C ₁ in the first reference concentration comparison process, the energy management device executes the current time determination process. On the contrary, if the energy management device determines that the carbon dioxide concentration at the present time is less than the first reference concentration C ₁ in the process of comparing the first reference concentration, that is, the concentration of carbon dioxide at the present time affects the indoor life of the occupants. If not determined, the energy management device stops the ventilation mode or the air cleaning mode of the air conditioning system to prevent unnecessary electricity charges. Preferably, the first reference concentration comparison process may be included after the current time determination process.

According to the present invention, in the operation mode selection step, the carbon dioxide concentration in the room is automatically controlled by operating or stopping the ventilation mode or the air cleaning mode of the air conditioning system in consideration of the current time, the carbon dioxide concentration at the present time, or the rate of change of the carbon dioxide at the present time. To provide a comfortable indoor environment for the occupants, and to provide improved air quality (ie, air quality when the concentration of carbon dioxide in the room is less than the first reference concentration (C ₁ ) or the second reference concentration (C ₂ )). a case while preventing the unnecessary operation of the air conditioning system reduces the electrical charge at the same time electric charge peak times (Δt _peak), the electrical charges during peak hours by as much as possible restraint in that the ventilation mode or the air purifying mode, the air conditioning system is operating (Δt _peak Can save excessive electricity charges.

Although the preferred embodiments of the present invention have been shown and described above, the present invention is not limited to the above-described embodiments, and the general knowledge in the field of the present invention without departing from the gist of the present invention as claimed in the following claims. Anyone with a variety of modifications are possible, of course, such modifications are within the scope of the claims.

20: smart meter 30: energy management device
120: air conditioning system 200: control method of the air conditioning system

Claims (18)

An electric charge information receiving step of receiving information on an electric charge peak time system including an electric charge peak time zone, the electric charge being variable according to a time zone;
A concentration information collection step of collecting information on a carbon dioxide concentration and a change rate of carbon dioxide concentration in a room with a carbon dioxide sensor;
An operation mode selection step of selecting an operation mode of the air conditioning system for reducing the carbon dioxide concentration in the room based on the information received in the electricity rate information receiving step and the information collected in the concentration information collecting step; And
And an operation step of operating an air conditioning system according to the operation mode selected in the operation mode selection step. The method of claim 1,
The operation mode of the air conditioning system for reducing the carbon dioxide in the room is a control method of the air conditioning system, characterized in that at least one of the ventilation mode or the air cleaning mode. The method of claim 1,
And after the receiving of the electric charge information, determining a preliminary operating time period for operating the air conditioning system in advance before the electric charge peak time zone. The method of claim 3,
The operation mode of the air conditioning system includes a preliminary operation mode for operating the air conditioning system in the preliminary operation time zone or a normal operation mode for operating the air conditioning system in a time other than the preliminary operation time zone. Control method of the system. The method of claim 4, wherein
In the operation mode selection step, if the current time is outside the preliminary operation time zone,
The control mode of the air conditioning system, characterized in that the operation mode of the air conditioning system executed in the operation step is a normal operation mode. The method of claim 4, wherein
In the operation mode selection step, if the current time is within the preliminary operating time zone and the air conditioning system is operating at the present time,
The control mode of the air conditioning system, characterized in that the operation mode of the air conditioning system executed in the operation step is a normal operation mode. The method of claim 4, wherein
In the operation mode selection step, if the current time is within the preliminary operating time zone and the air conditioning system is not operating at the present time,
The operation mode selection step further comprises a first reference concentration comparison process for comparing whether the current carbon dioxide concentration collected in the concentration information collection step is less than the first predetermined reference concentration. The method of claim 7, wherein
If it is determined that the carbon dioxide concentration at the present time is less than the first reference concentration in the first reference concentration comparison process,
The control mode of the air conditioning system, characterized in that the operation mode of the air conditioning system executed in the operation step is a normal operation mode. The method of claim 7, wherein
When it is determined that the carbon dioxide concentration at the present time is greater than or equal to the first reference concentration in the first reference concentration comparison process,
The control mode of the air conditioning system, characterized in that the operation mode of the air conditioning system executed in the operation step is a preliminary operation mode. The method of claim 7, wherein
When it is determined that the carbon dioxide concentration at the present time is greater than or equal to the first reference concentration in the first reference concentration comparison process,
The operation mode selection step further comprises a concentration change rate comparison process for comparing whether the change rate of carbon dioxide concentration at the current time collected in the concentration information collection step is less than a predetermined reference concentration change rate. The method of claim 10,
In the comparison process of the concentration change rate, if it is determined that the carbon dioxide concentration change rate at the present time is less than the standard concentration change rate,
The control mode of the air conditioning system, characterized in that the operation mode of the air conditioning system executed in the operation step is a normal operation mode. The method of claim 10,
In the comparison process of the concentration change rate, if it is determined that the carbon dioxide concentration change rate at the present time is more than the standard concentration change rate,
The control mode of the air conditioning system, characterized in that the operation mode of the air conditioning system executed in the operation step is a preliminary operation mode. The method of claim 4, wherein
When the operation mode of the air conditioning system selected in the operation mode selection step is the normal operation mode,
The operation step includes a second reference concentration comparison process for comparing whether a current carbon dioxide concentration is greater than or equal to a preset second reference concentration; and stopping the air conditioning system when the current carbon dioxide concentration is less than the second reference concentration; And controlling the air conditioning system if the present carbon dioxide concentration is greater than or equal to the second reference concentration. The method of claim 13,
Stopping the air conditioning system when the current time point after the air conditioning system is operated in the second reference concentration comparison process is within the electric charge peak time period; If the present time point after operating the air conditioning system in the second reference concentration comparison process is outside the electric charge peak stage, the operation step compares the first reference concentration comparing whether the current carbon dioxide concentration is less than the first reference concentration. The control method of the air conditioning system, characterized in that it further comprises a process. The method of claim 14,
Stopping the air conditioning system when the carbon dioxide concentration at the present time is less than the first reference concentration in the first reference concentration comparison process; In the first reference concentration comparison process, if the carbon dioxide concentration at the present time is greater than or equal to the first reference concentration, the operation step is an air conditioning system, characterized in that for performing the second reference concentration comparison process and the first reference concentration comparison process again. Control method. The method of claim 4, wherein
When the operation mode of the air conditioning system selected in the operation mode selection step is a preliminary operation mode,
In the operation step, the air volume determination for determining whether the air volume of the air conditioning system during the preliminary operation time period after the operation of the air conditioning system is more than a predetermined amount of air sufficient to reduce the carbon dioxide concentration at the present time to less than the first predetermined reference concentration. The control method of the air conditioning system comprising a. The method of claim 16,
If it is determined that the first air volume, which is the current air volume of the air conditioning system, is less than the second predetermined air volume in the air flow determination process, the air conditioning system is operated by increasing the air volume to a second air volume larger than the first air volume. Control method of an air conditioning system. The method of claim 17,
And stopping the air conditioning system if the current time after the air flow rate determination process is the peak electric charge period.

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