CN114688684B - Control method and device of air conditioning unit and electronic equipment - Google Patents

Control method and device of air conditioning unit and electronic equipment Download PDF

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Publication number
CN114688684B
CN114688684B CN202210430992.6A CN202210430992A CN114688684B CN 114688684 B CN114688684 B CN 114688684B CN 202210430992 A CN202210430992 A CN 202210430992A CN 114688684 B CN114688684 B CN 114688684B
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China
Prior art keywords
power
compressor
spray
current
conditioning unit
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CN202210430992.6A
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Chinese (zh)
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CN114688684A (en
Inventor
刘加劲
颜利波
丁云霄
王峰
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Midea Group Co Ltd
GD Midea Heating and Ventilating Equipment Co Ltd
Original Assignee
Midea Group Co Ltd
GD Midea Heating and Ventilating Equipment Co Ltd
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Priority to CN202210430992.6A priority Critical patent/CN114688684B/en
Publication of CN114688684A publication Critical patent/CN114688684A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/46—Improving electric energy efficiency or saving
    • F24F11/47—Responding to energy costs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/49—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring ensuring correct operation, e.g. by trial operation or configuration checks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
    • F24F5/001—Compression cycle type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/60—Energy consumption

Abstract

The invention provides a control method and device of an air conditioning unit and electronic equipment. The method is applied to a centralized controller of an air conditioning unit, and a heat exchanger of the air conditioning unit is provided with a spraying system; the method comprises the following steps: collecting the running power of a compressor; controlling a spray system to perform a spray operation in response to the power demand response signal to spray water mist through the spray system to the heat exchanger; the spray system is controlled to continue or stop performing the spray operation based on the first operating power of the compressor collected before the spray operation is performed and the second operating power of the compressor collected after the spray operation is performed. In the mode, the spray system sprays water mist to the heat exchanger, so that the power load can be reduced, and the safety of a power grid can be ensured; in addition, the mode does not need to turn off part of indoor air conditioner or directly power off the air conditioner, so that the comfort and experience of indoor personnel can be improved.

Description

Control method and device of air conditioning unit and electronic equipment
Technical Field
The present invention relates to the field of air conditioners, and in particular, to a control method and apparatus for an air conditioning unit, and an electronic device.
Background
Because of the high temperature environment in summer, the demand of people for starting the air conditioner is increased, so that the load of the power grid is increased, and risks are brought to the reliable operation of the power grid. Therefore, an electric power demand response signal may be received during a peak of summer electricity consumption, and the electric power demand response signal represents that the electric power demand is required to be reduced, and the electric power consumption is usually reduced by turning off part of indoor air conditioners or directly powering off the air conditioners.
Disclosure of Invention
Therefore, the invention aims to provide a control method, a control device and electronic equipment of an air conditioning unit, so as to reduce the power load, ensure the safety of a power grid and improve the comfort and experience of indoor personnel.
In a first aspect, an embodiment of the present invention provides a control method for an air conditioning unit, which is applied to a central controller of the air conditioning unit, where a heat exchanger of the air conditioning unit is configured with a spray system; the method comprises the following steps: collecting the running power of a compressor of an air conditioning unit; controlling a spray system to perform a spray operation in response to the power demand response signal to spray water mist through the spray system to the heat exchanger; the spray system is controlled to continue or stop performing the spray operation based on the first operating power of the compressor collected before the spray operation is performed and the second operating power of the compressor collected after the spray operation is performed.
In a preferred embodiment of the present application, the step of collecting the operation power of the compressor includes: collecting first operating power of the compressor before the spraying system performs a spraying operation; and collecting second operation power of the compressor at a preset first time after the spraying system performs the spraying operation.
In a preferred embodiment of the present application, the controlling the spraying system to continue to perform the spraying operation or stop performing the spraying operation based on the first operation power of the compressor collected before the spraying operation is performed and the second operation power of the compressor collected after the spraying operation is performed includes: calculating a power ratio of the second operating power to the first operating power; if the power ratio is smaller than or equal to a preset power threshold, controlling the spraying system to continue to perform spraying operation until stopping responding to the power demand response signal; and if the power ratio is greater than the power threshold, controlling the spraying system to stop executing the spraying operation.
In a preferred embodiment of the present application, the step of controlling the spraying system to perform the spraying operation in response to the power demand response signal includes: determining whether the spray system has a fault in response to the power demand response signal; and if the spraying system does not have a fault, controlling the spraying system to execute the spraying operation.
In a preferred embodiment of the present application, the air conditioning unit includes a plurality of air conditioners, and the central controller is communicatively connected with controllers of the plurality of air conditioners; the method further comprises the steps of: determining a first temperature of the air conditioner in response to the power demand response signal; the first temperature is sent to the plurality of controllers to cause the plurality of air conditioners to perform a cooling operation based on the first temperature.
In a preferred embodiment of the present application, the step of performing a cooling operation by the plurality of air conditioners based on a first temperature includes: the controllers of the plurality of air conditioners determine a second temperature at which the air conditioners currently perform a cooling operation; the controller controls the air conditioner to perform a cooling operation based on the first temperature if the second temperature is less than the first temperature.
In a preferred embodiment of the present application, the method further includes: a controller of the plurality of air conditioners determines a third temperature smaller than the first temperature in response to the temperature adjustment operation; the controller controls the air conditioner to perform a cooling operation based on the third temperature.
In a preferred embodiment of the present application, the method further includes: determining a maximum operating current of a compressor of the air conditioning unit in response to the power demand response signal; the operating power of the compressor is determined based on the maximum operating current, and the compressor is controlled to operate based on the operating power.
In a preferred embodiment of the present application, the step of determining the maximum operation current of the compressor of the air conditioning unit in response to the power demand response signal includes: determining a maximum operating power of a compressor of the air conditioning unit in response to the power demand response signal; the maximum operating current is determined based on the maximum operating power.
In a preferred embodiment of the present application, the step of collecting the operation power of the compressor includes: collecting the current running power of the compressor based on a preset first time interval; the step of determining the operation power of the compressor based on the maximum operation current includes: collecting the current running current of the compressor based on a preset second time interval; calculating a current difference value between the current running current and the maximum running current; determining a current power difference value corresponding to the current difference value based on a preset corresponding relation between the current difference value and the power difference value; and subtracting the current power difference from the current operating power to obtain the operating power of the compressor.
In a preferred embodiment of the present application, after the step of performing the spraying operation by the spraying system, the method further includes: if the current running current is smaller than the maximum running current, determining a target running power which is larger than the current running power; the compressor is controlled to operate based on the target operating power.
In a second aspect, an embodiment of the present invention further provides a control device for an air conditioning unit, where the control device is applied to a centralized controller of the air conditioning unit, and a heat exchanger of the air conditioning unit is configured with a spray system; the device comprises: the operation power acquisition module is used for acquiring the operation power of the compressor of the air conditioning unit; the spraying operation execution module is used for responding to the power demand response signal and controlling the spraying system to execute spraying operation so as to spray water mist to the heat exchanger through the spraying system; and the spraying system control module is used for controlling the spraying system to continue to execute the spraying operation or stop executing the spraying operation based on the first operation power of the compressor acquired before executing the spraying operation and the second operation power of the compressor acquired after executing the spraying operation.
In a third aspect, an embodiment of the present invention further provides an electronic device, including a processor and a memory, where the memory stores computer executable instructions that can be executed by the processor, and the processor executes the computer executable instructions to implement the control method of an air conditioning unit.
In a fourth aspect, embodiments of the present invention further provide a computer-readable storage medium storing computer-executable instructions that, when invoked and executed by a processor, cause the processor to implement the control method of an air conditioning unit described above.
The embodiment of the invention has the following beneficial effects:
according to the control method, the control device and the electronic equipment of the air conditioning unit, provided by the embodiment of the invention, the spraying system can be controlled to execute spraying operation in response to the power demand response signal, water mist is sprayed to the heat exchanger through the spraying system, and whether the spraying operation is continued or not is determined according to the running power of the compressor. In the mode, the spray system sprays water mist to the heat exchanger, so that the power load can be reduced, and the safety of a power grid can be ensured; in addition, the mode does not need to turn off part of indoor air conditioner or directly power off the air conditioner, so that the comfort and experience of indoor personnel can be improved.
Additional features and advantages of the disclosure will be set forth in the description which follows, or in part will be obvious from the description, or may be learned by practice of the techniques of the disclosure.
The foregoing objects, features and advantages of the disclosure will be more readily apparent from the following detailed description of the preferred embodiments taken in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a control method of an air conditioning unit according to an embodiment of the present invention;
FIG. 2 is a flowchart of another control method of an air conditioning unit according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a control method of an air conditioning unit according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a correspondence relationship between a current difference value and a power difference value according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a spray system according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a control device of an air conditioning unit according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Icon:
1-a nozzle; 2-water pipes; 3-an electromagnetic valve; 4-a pressure reducing valve; a 5-heat exchanger; 61-running a power harvesting module; 62-a spray operation execution module; 63-a spray system control module; 100-memory; a 101-processor; 102-a bus; 103-communication interface.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
At present, because of the high-temperature environment in summer, the requirement of people for starting an air conditioner is increased, so that the load of a power grid is increased, and risks can be brought to the reliable operation of the power grid. Therefore, an electric power demand response signal may be received during a peak of summer electricity consumption, and the electric power demand response signal represents that the electric power demand is required to be reduced, and the electric power consumption is usually reduced by turning off part of indoor air conditioners or directly powering off the air conditioners.
Based on the above, the control method, the device and the electronic equipment of the air conditioning unit provided by the embodiment of the invention provide a control method of the air conditioning unit when the peak power grid of summer electricity consumption is in high load operation, and the control method can be applied to a multi-split air conditioning unit comprising a plurality of air conditioners, and reduce the electricity consumption load of the air conditioner by spraying water mist to a heat exchanger through a spraying system, thereby ensuring the operation safety of the power grid and ensuring the comfort of indoor personnel as much as possible.
For the convenience of understanding the present embodiment, a detailed description will be given of a control method of an air conditioning unit disclosed in the embodiment of the present invention.
Embodiment one:
the embodiment of the invention provides a control method of an air conditioning unit, which is applied to a centralized controller of the air conditioning unit, wherein a heat exchanger of the air conditioning unit is provided with a spraying system. The air conditioning unit of this embodiment includes a plurality of air conditioners, and the centralized controller of air conditioning unit and the controller of every air conditioner all communication connection, and the centralized controller of air conditioning unit can send the instruction to the controller of air conditioner, and the controller can be according to the running state of the air conditioner that the instruction received control this controller corresponds.
Based on the above description, referring to a flowchart of a control method of an air conditioning unit shown in fig. 1, the control method of the air conditioning unit includes the steps of:
step S102, the operation power of a compressor of an air conditioning unit is collected.
The compressor is a driven fluid machine that lifts low-pressure gas into high-pressure gas, and is the heart of the refrigeration system of the air conditioner unit. The low-temperature low-pressure refrigerant gas is sucked from the air suction pipe, the motor is operated to drive the piston to compress the low-temperature low-pressure refrigerant gas, and then the high-temperature high-pressure refrigerant gas is discharged to the air discharge pipe to provide power for refrigeration cycle.
When the air conditioner unit is in an operation state, the operation power of the compressor of the air conditioner unit can be collected at certain intervals. The operation power of the compressor can be collected through a sensor arranged on the compressor, and the collected operation power can be sent to a centralized controller of the air conditioning unit after the operation power is collected by the sensor. The centralized controller may be an electronic device such as an MCU (Microcontroller Unit, micro control unit), a CPU (Central Processing Unit, central controller), etc.
And step S104, responding to the power demand response signal, controlling the spraying system to execute spraying operation so as to spray water mist to the heat exchanger through the spraying system.
When the price of the electric wholesale market is increased or the reliability of the system is threatened, after receiving a direct compensation notification of the induced load reduction or an electric price increasing signal sent by a power supply party, an electric power user changes the inherent habit power consumption mode of the electric power user, and the electric power user responds to the electric power supply by reducing or pushing the electric load in a certain period of time, so that the stability of a power grid is ensured, and the short-term behavior of the electric price increase is inhibited.
The power demand response signal is typically sent by an electric utility, and the central controller of the air conditioning unit may receive and respond to the power demand response signal to control the spray system to perform a spray operation to spray water mist through the spray system to the heat exchanger.
Specifically, the central controller may send an instruction to perform a spraying operation to the spraying system, and after the spraying system receives the instruction, the spraying operation may be performed according to the instruction. The spraying mode of the spraying system for executing the spraying operation may be intermittent spraying or continuous spraying, and in this embodiment, the spraying mode is not limited.
A heat exchanger is also known as a heat exchanger and is a device that transfers a portion of the heat of a hot fluid to a cold fluid. The spray system can spray water mist to the heat exchanger of the compressor unit, so that the surface temperature of the heat exchanger can be effectively reduced, the electric energy consumed by the heat exchanger is reduced, the power load is reduced, and the safety of a power grid is ensured. In addition, in the embodiment, part of the indoor air conditioner is not closed or the air conditioner is directly powered off, so that the comfort and experience of indoor personnel can be improved.
Step S106, based on the first operation power of the compressor collected before the spraying operation is performed and the second operation power of the compressor collected after the spraying operation is performed, the spraying system is controlled to continue to perform the spraying operation or stop performing the spraying operation.
The present embodiment may collect the operation power of the compressor before and after the spraying operation is performed, which may be referred to as a first operation power and a second operation power, respectively. By calculating according to the first operating power and the second operating power, whether the mode of spraying water mist to the heat exchanger through the spraying system can effectively reduce the electric energy consumed by the heat exchanger can be determined. If yes, the spraying system can be controlled to continue to execute spraying operation; if not, the spray system may be controlled to stop performing the spraying operation.
Furthermore, if not, other ways of reducing the electrical load need to be employed, such as: closing part of indoor air conditioners, directly powering off the air conditioners, improving the set temperature of each air conditioner, reducing the running current of a compressor and the like.
According to the control method of the air conditioning unit, provided by the embodiment of the invention, the spraying system can be controlled to execute spraying operation in response to the power demand response signal, water mist is sprayed to the heat exchanger through the spraying system, and whether the spraying operation is continued is determined according to the running power of the compressor. In the mode, the spray system sprays water mist to the heat exchanger, so that the power load can be reduced, and the safety of a power grid can be ensured; in addition, the mode does not need to turn off part of indoor air conditioner or directly power off the air conditioner, so that the comfort and experience of indoor personnel can be improved.
Embodiment two:
the present embodiment provides another control method of an air conditioning unit, which is implemented on the basis of the foregoing embodiment, as shown in a flowchart of another control method of an air conditioning unit shown in fig. 2, where the control method of an air conditioning unit in this embodiment includes the following steps:
step S202, collecting the operation power of a compressor of an air conditioning unit.
Referring to a schematic diagram of a control method of an air conditioning unit shown in fig. 3, when an external unit of the air conditioning unit is operating normally, the operating power of the compressor may be collected, for example: collecting first operating power of the compressor before the spraying system performs a spraying operation; and collecting second operation power of the compressor at a preset first time after the spraying system performs the spraying operation.
When the second operation power is collected after the spraying system performs the spraying operation, the spraying system may be first waited for a period of time (i.e., the first time may be 5-10 minutes), and then the second operation power of the compressor is collected.
In this embodiment, in addition to the manner of reducing the electric load by controlling the spraying system to perform the spraying operation, other manners of reducing the electric load may be adopted, for example: the setting temperature of each air conditioner is increased, the operation current of the compressor is reduced, and the like, and will be described in order.
As shown in fig. 3, a method of increasing the set temperature of each air conditioner, a method of reducing the operation current of the compressor, and a method of performing a spraying operation by controlling the spraying system may be used first. The above-mentioned modes may all be adopted, or only one mode may be adopted, and the order of the above-mentioned modes may not be fixed, and may be set according to the need, which is not specified in the present embodiment.
As shown in fig. 3, the central controller may automatically adjust the set temperature Ts of the indoor unit, for example: determining a first temperature of the air conditioner in response to the power demand response signal; the first temperature is sent to the plurality of controllers to cause the plurality of air conditioners to perform a cooling operation based on the first temperature. The air conditioning unit comprises a plurality of air conditioners, and the centralized controller is in communication connection with controllers of the plurality of air conditioners.
When the centralized controller of the multi-split air conditioning unit receives the power demand response signal of the power grid, in order to reduce the power load of the air conditioning unit, the set temperature Ts of the indoor unit can be firstly adjusted to be a first temperature (the first temperature can be 26 ℃), and the set temperature of the indoor unit with the set temperature lower than the first temperature is forcedly increased to the first temperature so as to reduce the power load of the air conditioning unit.
If the set temperature of the air conditioner is smaller than the first temperature, adjustment is needed, and if the set temperature of the air conditioner is larger than or equal to the first temperature, adjustment is not needed. For example: the controllers of the plurality of air conditioners determine a second temperature at which the air conditioners currently perform a cooling operation; the controller controls the air conditioner to perform a cooling operation based on the first temperature if the second temperature is less than the first temperature.
The second temperature of the air conditioner for executing the refrigeration operation is the current set temperature of the air conditioner, if the second temperature is smaller than the first temperature, the second temperature needs to be adjusted, and the controller controls the air conditioner to execute the refrigeration operation based on the first temperature; if the second temperature is greater than or equal to the first temperature, the controller controls the air conditioner to perform a cooling operation based on the second temperature without adjusting the second temperature.
In addition, if the user feels hot indoors, the set temperature of the air conditioner is manually lowered again, and at this time, the set temperature of the air conditioner is not raised any more, for example: a controller of the plurality of air conditioners determines a third temperature smaller than the first temperature in response to the temperature adjustment operation; the controller controls the air conditioner to perform a cooling operation based on the third temperature.
When the indoor user finds that the set temperature is too high, the set temperature Ts is reduced from the first temperature to the third temperature again, and at the moment, the control method does not forcedly increase the set temperature Ts any more so as to ensure the comfort level of the indoor user.
In the mode, the centralized controller of the air conditioning unit can detect the set temperatures of all the indoor units and adjust the set temperatures of all the air conditioning indoor units with the set temperatures lower than the first temperature to the first temperature; if the set temperature of one indoor unit is set to be lower than the first temperature by the user again, the indoor unit is not adjusted.
If the manner of increasing the set temperature of each air conditioner fails to reduce the power of the air conditioning unit within the required range, the manner of reducing the operation current of the compressor may be used, for example: determining a maximum operating current of a compressor of the air conditioning unit in response to the power demand response signal; the operating power of the compressor is determined based on the maximum operating current, and the compressor is controlled to operate based on the operating power.
As shown in fig. 3, the maximum operation current Imax of the compressor can be calculated, and the operation frequency of the compressor can be adjusted according to the difference between the maximum operation current Imax and the current operation current I1, so as to ensure that the power reaches the requirement.
The maximum allowed operating power may first be calculated from the requirements of the power signal and converted into a maximum allowed operating current Imax, for example: determining a maximum operating power of a compressor of the air conditioning unit in response to the power demand response signal; the maximum operating current is determined based on the maximum operating power. Assuming that the maximum operation power of the compressor of the air conditioning unit is Pmax, the rated power of the compressor is U, and the maximum operation current imax=pmax/U.
Specifically, the current operating power of the compressor may be collected based on a preset first time interval; collecting the current running current of the compressor based on a preset second time interval; calculating a current difference value between the current running current and the maximum running current; determining a current power difference value corresponding to the current difference value based on a preset corresponding relation between the current difference value and the power difference value; and subtracting the current power difference from the current operating power to obtain the operating power of the compressor.
When the operation power of the compressor is collected, the current operation power of the compressor can be collected based on a preset first time interval, and the current operation current of the compressor can be collected based on a preset second time interval. The first time interval and the second time interval may be the same or different, and the first time interval and the second time interval are each exemplified as 30 in this embodiment.
Calculating the difference between the current running current I1 and the maximum running current Imax every 30 seconds, and if the difference is smaller than or equal to 0A, meeting the requirement of reducing the load without adjustment; if the difference is greater than 0A, the requirement of reducing the load is not met, and adjustment is needed, and in the embodiment, the current power difference corresponding to the current difference can be determined according to the corresponding relation between the current difference and the power difference, which are preset; and subtracting the current power difference from the current operating power to obtain the operating power of the compressor.
Referring to a schematic diagram of a correspondence relationship between a current difference and a power difference shown in fig. 4, the correspondence relationship shown in fig. 4 is a gradient correspondence relationship, if a difference between a current running current and a maximum running current (i.e., a current difference) I1-Imax is greater than or equal to 6A, the current power difference is 8Hz, and the compressor forcibly reduces the frequency to 8Hz; if the I1-Imax is greater than or equal to 4A and smaller than 6A, the current power difference is 6Hz, and the compressor forcibly reduces the frequency to 6Hz; if the I1-Imax is greater than or equal to 2A and smaller than 4A, the current power difference is 4Hz, and the compressor forcibly reduces the frequency to 4Hz; if the I1-Imax is greater than or equal to 0A and less than 2A, the current power difference is 2Hz, and the compressor forcibly reduces the frequency to 2Hz; if I1-Imax is less than 0A, the current exits the compressor frequency control.
In this way, according to the received power demand signal, the maximum allowable operating power and current of the air conditioning unit can be calculated, the compressor is frequency limited according to the maximum current Imax, the operating current is reduced to the allowable range, and the total power is ensured not to exceed the maximum safety value.
Step S204, in response to the power demand response signal, it is determined whether the spray system has a fault.
The above-described manner of increasing the set temperature of each air conditioner and the manner of reducing the operation current of the compressor may reduce the operation power of the compressor, but at the same time, sacrifice the comfort of indoor personnel. Considering that the environment temperature is high, the electric energy load is overlarge, the heat exchange effect of the external heat exchanger can be optimized through the mode that the spray system on the external machine sprays water mist to the external heat exchanger, the condensation pressure is reduced, and the running power of the air conditioning unit is further reduced.
Referring to a schematic diagram of a spray system shown in fig. 5, the spray system comprises a nozzle 1, a water pipe 2, an electromagnetic valve 3 and a pressure reducing valve 4, and water mist can be sprayed to a heat exchanger 5 through the nozzle of the spray system, so that the purposes of optimizing the heat exchange effect of the external heat exchanger, reducing condensing pressure and further reducing the running power of an air conditioning unit are achieved.
As shown in fig. 3, the spray system may be checked for faults before it is used. If not, the centralized controller can control the spraying system to execute spraying operation; if so, a fault may be displayed on the centralized controller and prompted, for example: and making sound and light or sending prompt information to terminal equipment such as a mobile phone and a computer of a user.
And step S206, if the spraying system has no fault, controlling the spraying system to execute the spraying operation.
Step S208, controlling the spray system to continue or stop performing the spray operation based on the first operation power of the compressor collected before the spray operation is performed and the second operation power of the compressor collected after the spray operation is performed.
In order to avoid the problem that the heat exchange improvement of the spray on the external heat exchanger is not obvious due to the too high outdoor relative humidity, the operation power of the compressors before and after the spray needs to be compared. As shown in fig. 3, after the first operating power Q1 of the compressor is collected, a spraying operation may be performed, the compressor may not be up-scaled for 15 minutes after the spraying operation is performed to ensure a stable operation of the compressor, and the second operating power Q2 of the compressor after 5 minutes of the spraying operation is collected.
Specifically, a power ratio of the second operating power and the first operating power may be calculated; if the power ratio is smaller than or equal to a preset power threshold, controlling the spraying system to continue to perform spraying operation until stopping responding to the power demand response signal; and if the power ratio is greater than the power threshold, controlling the spraying system to stop executing the spraying operation.
Power ratio = second operating power Q2/first operating power Q1, as shown in fig. 3, the power threshold may be set to 95%. If the power ratio is smaller than or equal to the power threshold, the spraying effect is obvious, and the spraying operation is continuously executed until the response of the power demand response signal is stopped; if the power ratio is greater than the power threshold, it indicates that the spray effect is not obvious, and the spray operation may be stopped to avoid water waste.
The method comprises the steps that when a heat exchanger of an air conditioner unit is sprayed, the current running current of a compressor can be reduced, and if the current running current is smaller than the maximum running current, the target running power larger than the current running power is determined; the compressor is controlled to operate based on the target operating power.
If the current running current is smaller than the maximum running current, the current running power of the compressor can be properly improved, the output of the compressor is improved, and the refrigerating capacity of the indoor unit is improved.
In the mode, the heat exchanger of the air conditioning unit is provided with the spraying system, the spraying system is started, water mist sprayed to the surface of the heat exchanger can be evaporated and cooled on the surface of the fin, heat exchange of the air side of the compressor is improved, condensing pressure of the air conditioning unit is reduced, and air conditioning power is reduced. At the moment, if the current does not reach Imax, the compressor is allowed to properly raise the frequency, the output is improved, and the refrigerating capacity of the indoor unit is improved. If the outdoor air wet bulb temperature is high at this moment, relative humidity is big, if continuously spray, can not improve the heat exchange capacity of outer heat exchanger, spray the effect poor, need to close spraying system to avoid causing the water waste.
According to the method provided by the embodiment of the invention, after the air conditioning unit receives the power demand response signal, the indoor air conditioner does not need to be directly turned off, and the air conditioning unit can be controlled by adopting the following technology: raising the indoor set temperature; the frequency of the compressor is limited through the maximum allowable current, so that the load requirement of a power grid is met; the heat exchanger of the air conditioning unit is sprayed, so that the heat exchange effect of the external heat exchanger is improved, the condensing pressure is reduced, and the operation power consumption is reduced. The above modes can reduce the power load, ensure the safety of the power grid and improve the comfort and experience of indoor personnel.
Embodiment III:
corresponding to the above method embodiment, the embodiment of the present invention provides a control device of an air conditioning unit, which is applied to a central controller of the air conditioning unit, and a heat exchanger of the air conditioning unit is configured with a spraying system, referring to a schematic structural diagram of the control device of the air conditioning unit shown in fig. 6, where the control device of the air conditioning unit includes:
an operation power collection module 61 for collecting operation power of a compressor of the air conditioning unit;
a spray operation execution module 62 for controlling the spray system to execute a spray operation to spray water mist to the heat exchanger through the spray system in response to the power demand response signal;
the spraying system control module 63 is configured to control the spraying system to continue to perform the spraying operation or stop performing the spraying operation based on the first operation power of the compressor collected before the spraying operation is performed and the second operation power of the compressor collected after the spraying operation is performed.
The control device of the air conditioning unit provided by the embodiment of the invention can respond to the power demand response signal to control the spraying system to execute spraying operation, spray water mist to the heat exchanger through the spraying system, and determine whether to continue the spraying operation according to the running power of the compressor. In the mode, the spray system sprays water mist to the heat exchanger, so that the power load can be reduced, and the safety of a power grid can be ensured; in addition, the mode does not need to turn off part of indoor air conditioner or directly power off the air conditioner, so that the comfort and experience of indoor personnel can be improved.
The operation power acquisition module is used for acquiring the first operation power of the compressor before the spraying system executes spraying operation; and collecting second operation power of the compressor at a preset first time after the spraying system performs the spraying operation.
The spraying system control module is used for calculating the power ratio of the second operating power to the first operating power; if the power ratio is smaller than or equal to a preset power threshold, controlling the spraying system to continue to perform spraying operation until stopping responding to the power demand response signal; and if the power ratio is greater than the power threshold, controlling the spraying system to stop executing the spraying operation.
The spraying operation executing module is used for responding to the power demand response signal and determining whether a spraying system has faults or not; and if the spraying system does not have a fault, controlling the spraying system to execute the spraying operation.
The air conditioning unit comprises a plurality of air conditioners, and the centralized controller is in communication connection with controllers of the plurality of air conditioners; the device comprises: a temperature control module for determining a first temperature of the air conditioner in response to the power demand response signal; the first temperature is sent to the plurality of controllers to cause the plurality of air conditioners to perform a cooling operation based on the first temperature.
The temperature control module is used for determining a second temperature of the air conditioner for executing refrigeration operation currently by the controllers of the plurality of air conditioners; the controller controls the air conditioner to perform a cooling operation based on the first temperature if the second temperature is less than the first temperature.
The temperature control module is further used for determining a third temperature smaller than the first temperature by the controllers of the plurality of air conditioners in response to temperature adjustment operation; the controller controls the air conditioner to perform a cooling operation based on the third temperature.
The device comprises: a compressor control module for determining a maximum operating current of a compressor of the air conditioning unit in response to the power demand response signal; the operating power of the compressor is determined based on the maximum operating current, and the compressor is controlled to operate based on the operating power.
The compressor control module is used for responding to the power demand response signal and determining the maximum operation power of the compressor of the air conditioning unit; the maximum operating current is determined based on the maximum operating power.
The operation power acquisition module is used for acquiring the current operation power of the compressor based on a preset first time interval; the compressor control module is used for collecting the current running current of the compressor based on a preset second time interval; calculating a current difference value between the current running current and the maximum running current; determining a current power difference value corresponding to the current difference value based on a preset corresponding relation between the current difference value and the power difference value; and subtracting the current power difference from the current operating power to obtain the operating power of the compressor.
The device further comprises: the compressor operation module is used for determining target operation power which is larger than the current operation power if the current operation current is smaller than the maximum operation current; the compressor is controlled to operate based on the target operating power.
It will be clear to those skilled in the art that, for convenience and brevity of description, the specific working process of the control device of the air conditioning unit described above may refer to the corresponding process in the embodiment of the control method of the air conditioning unit described above, and will not be described herein again.
Embodiment four:
the embodiment of the invention also provides electronic equipment, which is used for running the control method of the air conditioning unit; referring to a schematic structural diagram of an electronic device shown in fig. 7, the electronic device includes a memory 100 and a processor 101, where the memory 100 is configured to store one or more computer instructions, and the one or more computer instructions are executed by the processor 101 to implement the control method of an air conditioning unit.
Further, the electronic device shown in fig. 7 further includes a bus 102 and a communication interface 103, and the processor 101, the communication interface 103, and the memory 100 are connected through the bus 102.
The memory 100 may include a high-speed random access memory (RAM, random Access Memory), and may further include a non-volatile memory (non-volatile memory), such as at least one magnetic disk memory. The communication connection between the system network element and at least one other network element is implemented via at least one communication interface 103 (which may be wired or wireless), and may use the internet, a wide area network, a local network, a metropolitan area network, etc. Bus 102 may be an ISA bus, a PCI bus, an EISA bus, or the like. The buses may be divided into address buses, data buses, control buses, etc. For ease of illustration, only one bi-directional arrow is shown in FIG. 7, but not only one bus or type of bus.
The processor 101 may be an integrated circuit chip with signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in the processor 101 or instructions in the form of software. The processor 101 may be a general-purpose processor, including a central processing unit (Central Processing Unit, CPU for short), a network processor (Network Processor, NP for short), etc.; but also digital signal processors (Digital Signal Processor, DSP for short), application specific integrated circuits (Application Specific Integrated Circuit, ASIC for short), field-programmable gate arrays (Field-Programmable Gate Array, FPGA for short) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be embodied directly in the execution of a hardware decoding processor, or in the execution of a combination of hardware and software modules in a decoding processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in the memory 100 and the processor 101 reads information in the memory 100 and in combination with its hardware performs the steps of the method of the previous embodiments.
The embodiment of the invention also provides a computer readable storage medium, which stores computer executable instructions that, when being called and executed by a processor, cause the processor to implement the control method of the air conditioning unit, and the specific implementation can be referred to the method embodiment and will not be described herein.
The method, the device and the computer program product of the electronic device for controlling the air conditioning unit provided by the embodiment of the invention comprise a computer readable storage medium storing program codes, and instructions included in the program codes can be used for executing the method in the previous method embodiment, and specific implementation can be referred to the method embodiment and will not be repeated here.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described system and/or apparatus may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In addition, in the description of embodiments of the present invention, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above examples are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, but it should be understood by those skilled in the art that the present invention is not limited thereto, and that the present invention is described in detail with reference to the foregoing examples: any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or perform equivalent substitution of some of the technical features, while remaining within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (12)

1. The control method of the air conditioning unit is characterized by being applied to a centralized controller of the air conditioning unit, wherein a heat exchanger of the air conditioning unit is provided with a spraying system; the method comprises the following steps:
collecting the running power of a compressor of the air conditioning unit;
Controlling the spray system to perform a spray operation in response to an electrical demand response signal to spray water mist through the spray system to the heat exchanger;
controlling the spray system to continue to perform the spray operation or stop performing the spray operation based on the first operating power of the compressor acquired before performing the spray operation and the second operating power of the compressor acquired after performing the spray operation;
the step of collecting the operation power of the compressor of the air conditioning unit comprises the following steps: collecting a first operating power of the compressor before the spray system performs the spray operation; collecting second operation power of the compressor for stable operation at a preset first time after the spraying system executes the spraying operation;
controlling the spray system to continue to perform the spray operation or to stop performing the spray operation based on the first operating power of the compressor acquired before performing the spray operation and the second operating power of the compressor acquired after performing the spray operation, includes: calculating a power ratio of the second operating power to the first operating power; if the power ratio is smaller than or equal to a preset power threshold, controlling the spraying system to continue to execute the spraying operation until the response of the power demand response signal is stopped; and if the power ratio is larger than the power threshold, controlling the spraying system to stop executing the spraying operation.
2. The method of claim 1, wherein the step of controlling the spray system to perform a spray operation in response to the power demand response signal comprises:
determining whether the spray system has a fault in response to the power demand response signal;
and if the spraying system does not have a fault, controlling the spraying system to execute spraying operation.
3. The method of claim 1, wherein the air conditioning unit comprises a plurality of air conditioners, the centralized controller being communicatively coupled to a plurality of controllers of the air conditioners; the method further comprises the steps of:
determining a first temperature of the air conditioner in response to the power demand response signal;
the first temperature is transmitted to a plurality of the controllers to cause the plurality of the air conditioners to perform a cooling operation based on the first temperature.
4. The method of claim 3, wherein the step of performing a cooling operation by a plurality of the air conditioners based on the first temperature comprises:
the controllers of the air conditioners determine a second temperature at which the air conditioners currently execute the refrigerating operation;
the controller controls the air conditioner to perform the cooling operation based on the first temperature if the second temperature is less than the first temperature.
5. A method according to claim 3, characterized in that the method further comprises:
a plurality of controllers of the air conditioners determine a third temperature smaller than the first temperature in response to a temperature adjustment operation;
the controller controls the air conditioner to perform the cooling operation based on the third temperature.
6. The method according to claim 1, wherein the method further comprises:
determining a maximum operating current of a compressor of the air conditioning unit in response to the power demand response signal;
and determining the operation power of the compressor based on the maximum operation current, and controlling the compressor to operate based on the operation power.
7. The method of claim 6, wherein the step of determining a maximum operating current of a compressor of the air conditioning unit in response to the power demand response signal comprises:
determining a maximum operating power of a compressor of the air conditioning unit in response to the power demand response signal;
the maximum operating current is determined based on the maximum operating power.
8. The method of claim 6, wherein the step of harvesting operating power of the compressor comprises: collecting the current running power of the compressor based on a preset first time interval;
A step of determining an operating power of the compressor based on the maximum operating current, comprising: collecting the current running current of the compressor based on a preset second time interval; calculating a current difference between the current running current and the maximum running current; determining a current power difference value corresponding to the current difference value based on a preset corresponding relation between the current difference value and the power difference value; and subtracting the current power difference value from the current operating power to obtain the operating power of the compressor.
9. The method of claim 8, wherein after the step of controlling the spray system to perform a spray operation, the method further comprises:
if the current running current is smaller than the maximum running current, determining a target running power which is larger than the current running power;
the compressor is controlled to operate based on the target operating power.
10. The control device of the air conditioning unit is characterized by being applied to a centralized controller of the air conditioning unit, wherein a heat exchanger of the air conditioning unit is provided with a spraying system; the device comprises:
the operation power acquisition module is used for acquiring the operation power of the compressor of the air conditioning unit;
A spray operation execution module for controlling the spray system to execute a spray operation in response to an electric power demand response signal to spray water mist to the heat exchanger through the spray system;
a spray system control module for controlling the spray system to continue to perform the spray operation or stop performing the spray operation based on a first operating power of the compressor acquired before performing the spray operation and a second operating power of the compressor acquired after performing the spray operation;
the operation power acquisition module is used for acquiring the first operation power of the compressor before the spraying system executes the spraying operation; collecting second operation power of the compressor for stable operation at a preset first time after the spraying system executes the spraying operation;
the spraying system control module is used for calculating the power ratio of the second operating power to the first operating power; if the power ratio is smaller than or equal to a preset power threshold, controlling the spraying system to continue to execute the spraying operation until the response of the power demand response signal is stopped; and if the power ratio is larger than the power threshold, controlling the spraying system to stop executing the spraying operation.
11. An electronic device comprising a processor and a memory, the memory storing computer-executable instructions executable by the processor, the processor executing the computer-executable instructions to implement the method of controlling an air conditioning unit of any of claims 1 to 9.
12. A computer readable storage medium storing computer executable instructions which, when invoked and executed by a processor, cause the processor to implement the control method of an air conditioning unit according to any one of claims 1 to 9.
CN202210430992.6A 2022-04-22 2022-04-22 Control method and device of air conditioning unit and electronic equipment Active CN114688684B (en)

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