CN113983648A - Control method and device of fresh air conditioning system and fresh air conditioning system - Google Patents
Control method and device of fresh air conditioning system and fresh air conditioning system Download PDFInfo
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- CN113983648A CN113983648A CN202111247031.3A CN202111247031A CN113983648A CN 113983648 A CN113983648 A CN 113983648A CN 202111247031 A CN202111247031 A CN 202111247031A CN 113983648 A CN113983648 A CN 113983648A
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- 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
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- 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
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- 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
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- 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
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
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- 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
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/20—Humidity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/50—Air quality properties
- F24F2110/65—Concentration of specific substances or contaminants
- F24F2110/70—Carbon dioxide
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The application relates to a control method and a device of a fresh air conditioning system and the fresh air conditioning system, belonging to the technical field of fresh air conditioning control, wherein the number of people in a target room is obtained by utilizing the concentration of outdoor carbon dioxide and the concentration of indoor carbon dioxide in the target room, the fresh air supply quantity of the target room is obtained based on the obtained number of people, and the temperature and humidity comparison result in the target room is obtained by utilizing the indoor temperature and humidity of the target room and the indoor temperature and humidity set value; and controlling the opening of a fresh air valve of the target room based on the obtained fresh air supply quantity, wherein the fresh air valve is used for adjusting the fresh air supply quantity of the target room, and controlling the frequency of a fan coil unit of the target room by using the obtained temperature and humidity comparison result, and the fan coil unit is used for carrying out heat exchange on the air in the target room. Through this application, help promoting new trend air conditioning system's efficiency, still help promoting the indoor air quality simultaneously, promote the travelling comfort of indoor environment.
Description
Technical Field
The application belongs to the technical field of fresh air conditioner control, and particularly relates to a control method and device of a fresh air conditioning system and the fresh air conditioning system.
Background
In the related art, when the indoor temperature environment is pursued to be comfortable, the call of consumers to the health aspect is higher and higher, and a fresh air conditioner is also produced accordingly, and the fresh air conditioning system is an air conditioning system integrated with a fresh air system.
In order to meet the requirement of normal operation under most environments in the initial design stage of the fresh air conditioning system, the maximum value of typical day-by-day loads is generally adopted as the room load value in load calculation, a certain margin coefficient is multiplied after calculation, and relevant equipment capable of covering parameters of the fresh air conditioning system is selected in equipment model selection. After the series of parameters are amplified, if the terminal equipment of the fresh air conditioning system operates according to the designed fixed air volume, the increase of energy consumption is inevitable.
Disclosure of Invention
Therefore, the application provides a control method and device of a fresh air conditioning system and the fresh air conditioning system, so as to solve the problem of energy consumption increase caused by the fact that when the maximum value of day-by-day time loads is adopted as the room load value, the tail end equipment of the fresh air conditioning system operates according to the designed fixed air volume.
In order to achieve the purpose, the following technical scheme is adopted in the application:
in a first aspect, the present application provides a method for controlling a fresh air conditioning system, the method comprising:
obtaining the number of people in a target room by utilizing the outdoor carbon dioxide concentration and the indoor carbon dioxide concentration of the target room, obtaining the fresh air supply quantity of the target room based on the obtained number of people, and obtaining a temperature and humidity comparison result in the target room by utilizing the indoor temperature and humidity of the target room and an indoor temperature and humidity set value;
and controlling the opening of a fresh air valve of the target room based on the obtained fresh air supply quantity, wherein the fan coil unit is used for carrying out heat exchange on the air in the target room, and carrying out frequency control on the fan coil unit of the target room by using the obtained temperature and humidity comparison result, and the fan coil unit is used for carrying out heat exchange on the air in the target room.
In a second aspect, the present application provides a control device of a fresh air conditioning system, the control device comprising:
the room number and temperature and humidity comparison result calculation obtaining module is used for obtaining the number of people in the target room by utilizing the outdoor carbon dioxide concentration and the indoor carbon dioxide concentration of the target room, obtaining the fresh air supply volume of the target room based on the obtained number of people, and obtaining a temperature and humidity comparison result in the target room by utilizing the indoor temperature and humidity of the target room and an indoor temperature and humidity set value;
and the control module is used for carrying out opening control on a fresh air valve of the target room based on the obtained fresh air supply quantity, the fresh air valve is used for adjusting the fresh air supply quantity of the target room, and carrying out frequency control on a fan coil unit of the target room by using the obtained temperature and humidity comparison result, and the fan coil unit is used for carrying out heat exchange on air in the target room.
In a third aspect, the present application provides a fresh air conditioning system, comprising:
a memory having an executable program stored thereon;
a processor for executing the executable program in the memory to implement the steps of any of the above methods.
This application adopts above technical scheme, possesses following beneficial effect at least:
the application provides a control method of a fresh air conditioning system, the number of people in a target room is predicted by utilizing the outdoor carbon dioxide concentration and the indoor carbon dioxide concentration of the target room, the indoor temperature and humidity and the indoor temperature and humidity set value of the target room are utilized, the temperature and humidity comparison result in the target room is obtained, the number of people in the target room and the temperature and humidity comparison result can reflect the change conditions of the personnel density and the indoor load in the target room, the opening of a fresh air valve of the fresh air conditioning system and the frequency of a fan coil unit are cooperatively adjusted, the variable air volume adjustment of the fresh air conditioning system is realized, the energy efficiency of the fresh air conditioning system is favorably improved, the indoor air quality is favorably improved, and the comfort of the indoor environment is improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart illustrating a method of controlling a fresh air conditioning system according to an exemplary embodiment;
FIG. 2 is a block schematic diagram illustrating a refrigeration portion of a fresh air conditioning system according to an exemplary embodiment;
FIG. 3 is a block diagram representation of a control device of a fresh air conditioning system according to an exemplary embodiment;
fig. 4 is a block diagram of a control portion of a fresh air conditioning system according to an exemplary embodiment.
In fig. 2:
1-a water chilling unit; 2-chilled water supply pipe; 3-chilled water supply pipe; 4-a fresh air handling unit; 5-fresh air inlet; 6-outdoor environment monitoring device; 7-surface cooler; 8-a fan of a fresh air unit; 9-a temperature and humidity sensor; 10-fresh air supply main pipe; 11-fresh air supply branch pipe; 12-a fresh air system air valve control module; 13-a static pressure sensor; 14-electric split multi-vane regulating valve; 15-indoor environment monitoring devices; 16-room; 17-blowing by a fan coil; 18-fan coil return air; 19-fan coil units; 20-fan coil fan.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail below. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1, fig. 1 is a flowchart illustrating a control method of a fresh air conditioning system according to an exemplary embodiment, where the method is applicable to the fresh air conditioning system shown in fig. 2, and the method includes the following steps:
and S11, obtaining the number of people in the target room by utilizing the outdoor carbon dioxide concentration and the indoor carbon dioxide concentration of the target room, obtaining the fresh air supply volume of the target room based on the obtained number of people, and obtaining a temperature and humidity comparison result in the target room by utilizing the indoor temperature and humidity of the target room and the indoor temperature and humidity set value.
Specifically, the fresh air conditioning system of the present application can monitor the concentration of carbon dioxide indoors and outdoors, please refer to fig. 2, the outdoor environment monitoring device 6 has a function of monitoring outdoor environment parameters, and the outdoor environment parameters monitored by the outdoor environment monitoring device include, but are not limited to, the following parameters: carbon dioxide, temperature and humidity. The outdoor carbon dioxide concentration can be obtained by the outdoor environment monitoring device 6. The indoor environment monitoring device 15 has a function of monitoring indoor environment parameters, and the monitored indoor environment parameters include, but are not limited to, the following parameters: carbon dioxide, temperature and humidity, and the indoor carbon dioxide concentration, the indoor temperature and humidity can be obtained by the indoor environment monitoring device 15.
A plurality of rooms are shown in fig. 2, for any one of which it is the target room.
The number of people in a target room can be obtained by utilizing the concentration of indoor and outdoor carbon dioxide, in the specific application, the increment of single carbon dioxide in unit time can be obtained, then the number of people in the target room is obtained by calculation according to the concentration difference value of indoor and outdoor carbon dioxide in a period of time, and further the appropriate fresh air volume matched with the number of people in the target room is obtained according to the number of people, so that the requirement of users in the target room is met, and the minimum fresh air energy consumption of the minimum target room is also realized.
For the indoor temperature and humidity of the target room and the indoor temperature and humidity set value, the temperature and humidity comparison result in the target room is obtained, so that the frequency of the fan coil fan is controlled by using the temperature and the humidity together, and in practical application, the temperature t3 and the relative humidity in the target room can be obtained by the indoor environment monitoring device 15
The indoor temperature set value t4 and the relative humidity set value
And comparing the set values to obtain a temperature and humidity comparison result in the target room.
And S12, controlling the opening of a fresh air valve of the target room based on the obtained fresh air supply quantity, wherein the fresh air valve is used for adjusting the fresh air supply quantity of the target room, and controlling the frequency of a fan coil unit of the target room by using the obtained temperature and humidity comparison result, and the fan coil unit is used for carrying out heat exchange on the air in the target room.
Referring to fig. 2, the fan 8 of the fresh air handling unit drives fresh air to enter each fresh air supply branch pipe 11 through the fresh air supply main pipe 10, and the fresh air is delivered to each room through each fresh air supply branch pipe 11. An electric folio multi-leaf regulating valve 14 (namely a fresh air valve) is arranged on the fresh air supply branch pipe 11 corresponding to each room and is used for regulating the fresh air supply amount of the corresponding room, and specifically, the fresh air supply amount is regulated by regulating the opening degree of the electric folio multi-leaf regulating valve 14. Meanwhile, each room is also provided with a fan-coil unit 19, the fan-coil unit 19 is used for carrying out heat exchange on air in the room to realize refrigeration of the room, specifically, the water chilling unit 1 provides chilled water for a coil of the fan-coil unit 19 through a chilled water supply pipe 2, the fan-coil unit 19 enables air in the room to enter from a fan-coil return air 18 through a fan-coil fan 20 and carry out heat exchange with the coil of the fan-coil unit 19, then the air after heat exchange enters the room from a fan-coil air supply 17, and the air quantity of heat exchange in unit time with the coil of the fan-coil unit 19 is adjusted by adjusting the frequency of the fan-coil fan 20.
In this application, remove the estimation number of indoor people according to the measured value of indoor, outer carbon dioxide concentration, again according to the minimum fresh air volume that everybody required every hour, remove to calculate the final fresh air volume value of carrying this room to this carries out aperture control to the new trend valve, adjusts and send suitable fresh air volume, so can guarantee indoor air quality. Meanwhile, different temperature and humidity comparison results indicate different indoor loads of the target room, the fan-coil unit of the target room is subjected to frequency control by using the temperature and humidity comparison results, the comfort of the indoor environment in the target room can be guaranteed, and meanwhile, the fan frequency of the fan-coil unit changes along with the change of the indoor loads, so that the energy efficiency of the system is improved. For example, for a variable frequency fan of a fan coil unit, the power and the rotating speed are in a cubic relation, when the load is reduced, the rotating speed of the fan is reduced, the power is greatly reduced, the energy efficiency value is improved, and the energy consumption of the fan is reduced compared with that of a traditional constant air volume system.
The indoor load can be classified into a cooling load, a heating load, and a humidity load. The cold load refers to heat quantity which must be taken away from a room by an air conditioning system at a certain moment or cold quantity which needs to be supplied to the room at a certain moment in order to maintain the indoor set temperature; the heat load refers to the amount of heat that needs to be supplied to a room per unit time to compensate for heat loss of the room; the moisture load refers to the amount of moisture dissipation from the source into the room, i.e. the amount of moisture that needs to be removed from the room to maintain the moisture content constant. Indoor loads change when heat transfer, radiation, or convection changes outside or inside a room.
Further, the opening control of the fresh air valve of the target room based on the obtained fresh air supply amount includes:
acquiring a corresponding target adjustment opening degree according to the obtained fresh air supply quantity;
and adjusting the opening of the fresh air valve of the target room to the target adjustment opening.
Specifically, the corresponding relation between the fresh air supply volume and the fresh air valve adjusting opening can be configured in advance, and the fresh air valve adjusting openings corresponding to different fresh air supply volumes are different. For the maximum fresh air volume, 120% of the design fresh air volume of the room may be configured. When the fresh air supply quantity is obtained, the corresponding target adjustment opening degree can be obtained by utilizing the corresponding relation, so that the opening degree of the fresh air valve of the target room is adjusted.
Further, the frequency control of the fan coil unit in the target room by using the obtained temperature and humidity comparison result includes:
when the indoor temperature of the target room is larger than the indoor temperature set value or the indoor humidity of the target room is larger than the indoor humidity set value, improving aHz the frequency of the fan-coil unit of the target room;
when the indoor temperature of the target room is less than or equal to an indoor temperature set value-b and the indoor humidity of the target room is less than or equal to an indoor humidity set value-c, keeping the frequency of a fan coil unit of the target room unchanged;
when the indoor temperature of the target room is less than an indoor temperature set value-b or the indoor humidity of the target room is less than or equal to an indoor humidity set value-c, reducing dHz the frequency of a fan coil unit of the target room;
wherein a, b, c and d are all preset constants.
In practical applications, a and d may be configured as 1, b may be configured as 0.5, and c may be configured as 50%. Through the control mode, the temperature and the humidity in the room can be accurately controlled, and the comfort of the indoor environment is guaranteed.
In conclusion, according to the related scheme, the number of people in the target room is predicted by utilizing the outdoor carbon dioxide concentration and the indoor carbon dioxide concentration of the target room, the temperature and humidity comparison result in the target room is obtained by utilizing the indoor temperature and humidity of the target room and the indoor temperature and humidity set value, and the number of people in the target room and the temperature and humidity comparison result can reflect the change conditions of the personnel density and the indoor load in the target room, so that the opening of a fresh air valve of the fresh air conditioning system and the frequency of a fan coil unit are cooperatively adjusted, the variable air volume adjustment of the fresh air conditioning system is realized, the energy efficiency of the fresh air conditioning system is favorably improved, the indoor air quality is favorably improved, and the comfort of the indoor environment is improved.
In one embodiment, the method further comprises:
acquiring outdoor monitoring data and fresh air supply monitoring data, wherein the outdoor monitoring data and the fresh air supply monitoring data respectively comprise: temperature and humidity;
when the outdoor temperature is higher than the fresh air supply temperature or the outdoor humidity is higher than the fresh air supply humidity, the fresh air is sent to be subjected to heat exchange treatment, and the steps are executed: and obtaining the number of people in the target room by utilizing the outdoor carbon dioxide concentration and the indoor carbon dioxide concentration of the target room, obtaining the fresh air supply volume of the target room based on the obtained number of people, and controlling the opening of a fresh air valve of the target room based on the obtained fresh air supply volume.
Specifically, the above scheme is that the temperature and the humidity of the outdoor environment are higher than those of the processed fresh air by the fresh air unit, namely the fresh air is high temperature and high humidity compared with the processed fresh air, and the fresh air can be sent into the room only by cooling and dehumidifying the fresh air to meet the conditions. Referring to fig. 2, when the scheme is executed, chilled water passes through the control surface cooler 7 to perform heat exchange treatment on fresh air, the chilled water at a low temperature enters the control surface cooler 7 to perform heat exchange with the fresh air, and then the fan 8 of the fresh air handling unit drives the fresh air to enter each fresh air supply branch pipe 11 through the fresh air supply main pipe 10 and to be conveyed to each corresponding room through each fresh air supply branch pipe 11. The electric split multi-blade adjusting valve 14 (namely a fresh air valve) is arranged on the fresh air supply branch pipe 11 corresponding to each room to adjust the fresh air supply quantity of the corresponding room to be proper, and under the scheme, the supplied fresh air is subjected to heat exchange treatment, so that for the fan-coil unit 19, the frequency adjustment of a fan-coil fan 20 of the fan-coil unit 19 in each target room can be effectively reduced, and the integral energy efficiency of the fresh air conditioning system is further improved.
Meanwhile, referring to fig. 2, in practical application of the fresh air conditioning system shown in fig. 2, a certain sound is generated when the fan coil fan 20 of the fan coil unit 19 works, and meanwhile, the fan coil unit 19 is closer to a room, so that a user in the room can feel the working sound of the fan coil fan 20 more easily. Under the above-mentioned scheme, let surface cooler 7 carry out the heat transfer to the new trend, the new trend temperature that gets into in the target room obtains descending, under this condition, to fan-coil unit 19, just can reduce fan-coil unit 19 to the heat transfer of room air, is reducing the frequency of fan-coil fan 20 in the execution, and the frequency of fan-coil fan 20 reduces, helps the production of noise abatement, and then helps guaranteeing the travelling comfort of indoor environment.
Further, the method further comprises:
when the outdoor temperature is higher than the fresh air supply temperature or the outdoor humidity is higher than the fresh air supply humidity, the outdoor carbon dioxide concentration is obtained once every first preset time interval, and then the steps are executed: and obtaining the number of people in the target room by utilizing the outdoor carbon dioxide concentration and the indoor carbon dioxide concentration of the target room, obtaining the fresh air supply volume of the target room based on the obtained number of people, and controlling the opening of a fresh air valve of the target room based on the obtained fresh air supply volume.
The outdoor carbon dioxide concentration is relatively stable, the outdoor carbon dioxide concentration is obtained once every first preset time interval by setting the first preset time interval, and the number of people in the target room is calculated by using the newly obtained outdoor carbon dioxide concentration within the first preset time interval. Not only can avoid frequent communication to obtain the outdoor carbon dioxide concentration, but also can ensure the accuracy of the number of people in the obtained target room. In practical applications, the value of the first preset time period may include, but is not limited to, 600 s.
Further, the method further comprises:
when the outdoor temperature is less than or equal to the fresh air supply temperature and the outdoor humidity is less than or equal to the fresh air supply humidity, the fresh air is not subjected to heat exchange treatment, the fresh air supply quantity of the target room is set to be the preset maximum fresh air quantity, the valve adjusting opening corresponding to the preset maximum fresh air quantity is obtained, and the valve adjusting opening corresponding to the preset maximum fresh air quantity is adjusted according to the opening of the fresh air valve of the target room.
Specifically, in practical application, the scheme can be triggered in cool weather, such as the weather in spring and autumn, cool air can be utilized, the fresh air unit only needs to start the fan, heat exchange treatment is not needed to be carried out on fresh air, the target room is enabled to be fed into the fresh air according to the maximum fresh air volume, cool outdoor air is fully utilized to cool the room, and therefore the energy efficiency of the fresh air conditioning system is improved.
In one embodiment, obtaining a temperature and humidity comparison result in the target room by using the indoor temperature and humidity of the target room and an indoor temperature and humidity set value includes:
and executing once every second preset time interval by utilizing the indoor temperature and humidity of the target room and the indoor temperature and humidity set value to obtain a temperature and humidity comparison result in the target room.
Specifically, the indoor temperature and humidity of the target room and the indoor temperature and humidity set value are used once every second preset time interval through the second preset time interval, so that a temperature and humidity comparison result in the target room is obtained, and frequent adjustment of the fan frequency of the fan coil unit is avoided. The temperature of the fresh air entering the target room is lower by utilizing the heat exchange treatment of the fresh air, and in practical application, the second preset time can be set longer, such as setting including but not limited to 600s, so as to further slow down the frequent regulation of the fan frequency of the fan coil unit.
In one embodiment, the method further comprises:
and obtaining an indoor air state point by utilizing indoor environment monitoring parameters, and stopping heat exchange treatment on the fresh air if the fresh air is fed to carry out heat exchange treatment when the air state point is determined to be positioned on a preset isenthalpic line.
In particular, for air, there are a number of relevant parameters: dry bulb temperature, wet bulb temperature, dew point temperature, enthalpy, moisture content, relative humidity, density. Any two parameters may define an air condition point and other parameter values may be found in the psychrometric chart. For example, when the indoor design temperature is 26 ℃ and the relative humidity is 60%, the corresponding enthalpy value is 58.849(kj/kg dry air), and an isenthalpic line, namely an indoor isenthalpic line, is drawn along the state point to be used as a preset isenthalpic line. When the air state point is located above the preset isenthalpic line, the fresh air does not bring cooling capacity to the room, and does not increase heat, and at the moment, the fresh air does not need to bear indoor cooling load to the target room, so that heat exchange treatment of the fresh air is stopped, and the fresh air is only used for providing fresh air indoors. Therefore, the heat exchange treatment energy consumption of the fresh air is reduced.
In one embodiment, before obtaining the number of people in the target room by using the outdoor carbon dioxide concentration and the indoor carbon dioxide concentration of the target room, and obtaining the temperature and humidity comparison result in the target room by using the indoor temperature and humidity of the target room and an indoor temperature and humidity setting value, the method further includes:
acquiring indoor environment data monitored by a mobile monitoring device at different regional positions in the target room, wherein the indoor environment data comprises: carbon dioxide concentration, temperature and humidity;
based on the indoor environment data monitored at different area positions, obtaining corrected values of carbon dioxide concentration, temperature and humidity;
and obtaining the indoor carbon dioxide concentration, the indoor temperature and the indoor humidity of the target room by using the corrected values of the carbon dioxide concentration, the temperature and the humidity.
Specifically, the indoor environment monitoring device of the fresh air conditioning system is fixed in position after being installed, only detects the local position where the fresh air conditioning system is located, possibly detects indoor environment monitoring data, the indoor overall environment condition cannot be well reflected, and the larger the room is, the more obvious the problem is. Therefore, by the scheme, the indoor environment parameters monitored by the indoor environment monitoring device of the fresh air conditioning system can be corrected, and the environment data capable of representing the condition of the whole room can be obtained.
The target room is partitioned, for example, for 1 100 square meters of room, the room is divided into 4 parts (parts are adjustable), a hand-held sensor (namely, a mobile monitoring device) is placed in the middle of each part, then each parameter is averaged, and the difference value between the average value of each parameter and each parameter monitored by the indoor environment monitoring device of the fresh air conditioning system is used as a correction value. In the monitoring process of the indoor environment monitoring device of the fresh air conditioning system, the monitored environmental parameter values are added with corresponding correction values to obtain corrected environmental parameter values, and the corrected environmental parameter values are used for subsequent processing.
The parameters can be uniformly corrected for rooms with similar room structures, positions, layouts and air conditioning system layouts.
In this application, the indoor environmental monitoring device of new trend air conditioning system self, the indoor environmental parameter of its monitoring is including carbon dioxide concentration, and in practical application, to environment monitoring device mounted position, should be based on considering with human breathing face parallel and level, avoid disturbing as far as possible, confirm suitable mounted position, if, can select to have a certain position of 1.4m height apart from ground about, install the indoor environmental monitoring device of new trend air conditioning system self.
In one embodiment, the method further comprises:
and acquiring the monitored static pressure of the fresh air supply main pipe, and adjusting the frequency of the fresh air supply fan based on the static pressure.
Specifically, the fan 8 of the fresh air handling unit drives fresh air to enter each fresh air supply branch pipe 11 through the fresh air supply main pipe 10 and to be conveyed to each corresponding room through each fresh air supply branch pipe 11, the static pressure of the fresh air handling unit is used for overcoming the resistance of fresh air conveying, the frequency of the fresh air handling unit is adjusted based on the static pressure, and the fresh air volume conveyed into each target room can be guaranteed. In practical application, the static pressure of the fresh air supply main pipe is monitored through the static pressure sensor, and when a pressure signal fed back by the static pressure sensor is lower than a set value, the frequency of the fresh air supply fan is controlled to be increased; and when the pressure signal fed back by the static pressure sensor is higher than a set value, controlling the fresh air supply fan to reduce the frequency.
Referring to fig. 3, fig. 3 is a block diagram illustrating a control device of a fresh air conditioning system according to an exemplary embodiment, where the control device 3 of the fresh air conditioning system includes:
a room number and temperature and humidity comparison result calculation obtaining module 31, configured to obtain the number of people in the target room by using the outdoor carbon dioxide concentration and the indoor carbon dioxide concentration of the target room, obtain a fresh air supply volume of the target room based on the obtained number of people, and obtain a temperature and humidity comparison result in the target room by using the indoor temperature and humidity of the target room and an indoor temperature and humidity setting value;
and the control module 32 is configured to perform opening control on a fresh air valve of the target room based on the obtained fresh air supply amount, where the fresh air valve is configured to adjust a fresh air supply amount of the target room, and perform frequency control on a fan coil unit of the target room by using the obtained temperature and humidity comparison result, and the fan coil unit is configured to perform heat exchange on air in the target room.
Further, in the module 31 is obtained by calculating the number of people in a room and the temperature and humidity comparison result, the opening control of the fresh air valve in the target room is performed based on the obtained fresh air supply amount, which includes:
acquiring a corresponding target adjustment opening degree according to the obtained fresh air supply quantity;
and adjusting the opening of the fresh air valve of the target room to the target adjustment opening.
Further, in the control module 32, the performing frequency control on the fan-coil unit in the target room by using the obtained temperature and humidity comparison result includes:
when the indoor temperature of the target room is larger than the indoor temperature set value or the indoor humidity of the target room is larger than the indoor humidity set value, improving aHz the frequency of the fan-coil unit of the target room;
when the indoor temperature of the target room is less than or equal to an indoor temperature set value-b and the indoor humidity of the target room is less than or equal to an indoor humidity set value-c, keeping the frequency of a fan coil unit of the target room unchanged;
when the indoor temperature of the target room is less than an indoor temperature set value-b or the indoor humidity of the target room is less than or equal to an indoor humidity set value-c, reducing dHz the frequency of a fan coil unit of the target room;
wherein a, b, c and d are all preset constants.
Further, in the module 31 for calculating the comparison result of the number of the rooms and the temperature and humidity, the module obtains the comparison result of the temperature and humidity in the target room by using the indoor temperature and humidity of the target room and the indoor temperature and humidity setting value, and includes:
and executing once every second preset time interval by utilizing the indoor temperature and humidity of the target room and the indoor temperature and humidity set value to obtain a temperature and humidity comparison result in the target room.
Further, the control device 3 further includes:
fresh air heat exchange opening module for acquire outdoor monitoring data and fresh air supply monitoring data, outdoor monitoring data with fresh air supply monitoring data both include separately: temperature and humidity; when the outdoor temperature is higher than the fresh air supply temperature or the outdoor humidity is higher than the fresh air supply humidity, the fresh air is sent to be subjected to heat exchange treatment, and the steps are executed: and obtaining the number of people in the target room by utilizing the outdoor carbon dioxide concentration and the indoor carbon dioxide concentration of the target room, obtaining the fresh air supply volume of the target room based on the obtained number of people, and controlling the opening of a fresh air valve of the target room based on the obtained fresh air supply volume.
Further, the module is opened in the new trend heat transfer, still is used for: when the outdoor temperature is higher than the fresh air supply temperature or the outdoor humidity is higher than the fresh air supply humidity, the outdoor carbon dioxide concentration is obtained once every first preset time interval, and then the steps are executed: and obtaining the number of people in the target room by utilizing the outdoor carbon dioxide concentration and the indoor carbon dioxide concentration of the target room, obtaining the fresh air supply volume of the target room based on the obtained number of people, and controlling the opening of a fresh air valve of the target room based on the obtained fresh air supply volume.
Further, the control device 3 further includes:
the first fresh air heat exchange stopping module is used for not performing heat exchange treatment on the fresh air when the outdoor temperature is less than or equal to the fresh air supply temperature and the outdoor humidity is less than or equal to the fresh air supply humidity, setting the fresh air supply quantity of the target room to be a preset maximum fresh air quantity, acquiring the valve adjusting opening corresponding to the preset maximum fresh air quantity, and adjusting the opening of the fresh air valve of the target room to the valve adjusting opening corresponding to the preset maximum fresh air quantity.
Further, the control device 3 further includes:
and the second fresh air heat exchange stopping module is used for obtaining an indoor air state point by utilizing the indoor environment monitoring parameters, and when the air state point is determined to be positioned on the preset isenthalpic line, if the fresh air is sent to be subjected to heat exchange treatment, the heat exchange treatment of the fresh air is stopped.
Further, the control device 3 further includes:
a correction module for obtaining the number of people in the target room by using the outdoor carbon dioxide concentration and the indoor carbon dioxide concentration of the target room, and obtaining the temperature and humidity comparison result in the target room by using the indoor temperature and humidity of the target room and the indoor temperature and humidity set value,
acquiring indoor environment data monitored by a mobile monitoring device at different regional positions in the target room, wherein the indoor environment data comprises: carbon dioxide concentration, temperature and humidity;
based on the indoor environment data monitored at different area positions, obtaining corrected values of carbon dioxide concentration, temperature and humidity;
and obtaining the indoor carbon dioxide concentration, the indoor temperature and the indoor humidity of the target room by using the corrected values of the carbon dioxide concentration, the temperature and the humidity.
Further, the control device 3 further includes:
and the static pressure adjusting module is used for acquiring the monitored static pressure of the fresh air supply main pipe and adjusting the frequency of the fresh air supply fan based on the static pressure.
With regard to the control device 3 in the above embodiment, the specific manner of executing the operation by each module thereof has been described in detail in the above embodiment of the related method, and will not be elaborated herein.
Referring to fig. 4, fig. 4 is a schematic block diagram of a control portion of a fresh air conditioning system according to an exemplary embodiment, where the fresh air conditioning system 4 includes:
a memory 41 having an executable program stored thereon;
a processor 42 for executing the executable program in the memory 41 to implement the steps of any of the above methods.
Specifically, the refrigeration part of the fresh air conditioning system 4 can be referred to fig. 2, and for the fresh air conditioning system 4, the specific way in which the processor 42 executes the program in the memory 41 has been described in detail in the embodiment related to the method, and will not be described in detail here.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present application, the meaning of "plurality" means at least two unless otherwise specified.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present; when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present, and further, as used herein, connected may include wirelessly connected; the term "and/or" is used to include any and all combinations of one or more of the associated listed items.
Any process or method descriptions in flow charts or otherwise described herein may be understood as: represents modules, segments or portions of code which include one or more executable instructions for implementing specific logical functions or steps of a process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present application.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (12)
1. A control method of a fresh air conditioning system is characterized by comprising the following steps:
obtaining the number of people in a target room by utilizing the outdoor carbon dioxide concentration and the indoor carbon dioxide concentration of the target room, obtaining the fresh air supply quantity of the target room based on the obtained number of people, and obtaining a temperature and humidity comparison result in the target room by utilizing the indoor temperature and humidity of the target room and an indoor temperature and humidity set value;
and carrying out opening control on a fresh air valve of the target room based on the obtained fresh air supply quantity, wherein the fresh air valve is used for adjusting the fresh air supply quantity of the target room, and carrying out frequency control on a fan coil unit of the target room by using the obtained temperature and humidity comparison result, and the fan coil unit is used for carrying out heat exchange on air in the target room.
2. The method according to claim 1, wherein said controlling the opening of the fresh air valve of the target room based on the obtained fresh air supply amount comprises:
acquiring a corresponding target adjustment opening degree according to the obtained fresh air supply quantity;
and adjusting the opening of the fresh air valve of the target room to the target adjustment opening.
3. The method of claim 1, wherein the using the obtained temperature and humidity comparison result to perform frequency control on the fan-coil unit of the target room comprises:
when the indoor temperature of the target room is larger than the indoor temperature set value or the indoor humidity of the target room is larger than the indoor humidity set value, improving aHz the frequency of the fan-coil unit of the target room;
when the indoor temperature of the target room is less than or equal to an indoor temperature set value-b and the indoor humidity of the target room is less than or equal to an indoor humidity set value-c, keeping the frequency of a fan coil unit of the target room unchanged;
when the indoor temperature of the target room is less than an indoor temperature set value-b or the indoor humidity of the target room is less than or equal to an indoor humidity set value-c, reducing dHz the frequency of a fan coil unit of the target room;
wherein a, b, c and d are all preset constants.
4. The method of claim 1, further comprising:
acquiring outdoor monitoring data and fresh air supply monitoring data, wherein the outdoor monitoring data and the fresh air supply monitoring data respectively comprise: temperature and humidity;
when the outdoor temperature is higher than the fresh air supply temperature or the outdoor humidity is higher than the fresh air supply humidity, the fresh air is sent to be subjected to heat exchange treatment, and the steps are executed: and obtaining the number of people in the target room by utilizing the outdoor carbon dioxide concentration and the indoor carbon dioxide concentration of the target room, obtaining the fresh air supply volume of the target room based on the obtained number of people, and controlling the opening of a fresh air valve of the target room based on the obtained fresh air supply volume.
5. The method of claim 4, further comprising:
when the outdoor temperature is higher than the fresh air supply temperature or the outdoor humidity is higher than the fresh air supply humidity, the outdoor carbon dioxide concentration is obtained once every first preset time interval, and then the steps are executed: and obtaining the number of people in the target room by utilizing the outdoor carbon dioxide concentration and the indoor carbon dioxide concentration of the target room, obtaining the fresh air supply volume of the target room based on the obtained number of people, and controlling the opening of a fresh air valve of the target room based on the obtained fresh air supply volume.
6. The method according to claim 4 or 5, characterized in that the method further comprises:
when the outdoor temperature is less than or equal to the fresh air supply temperature and the outdoor humidity is less than or equal to the fresh air supply humidity, the fresh air is not subjected to heat exchange treatment, the fresh air supply quantity of the target room is set to be the preset maximum fresh air quantity, the valve adjusting opening corresponding to the preset maximum fresh air quantity is obtained, and the valve adjusting opening corresponding to the preset maximum fresh air quantity is adjusted according to the opening of the fresh air valve of the target room.
7. The method according to claim 1, 3, 4 or 5, wherein obtaining the temperature and humidity comparison result in the target room by using the indoor temperature and humidity of the target room and the indoor temperature and humidity set value comprises:
and executing once every second preset time interval by utilizing the indoor temperature and humidity of the target room and the indoor temperature and humidity set value to obtain a temperature and humidity comparison result in the target room.
8. The method of claim 4, further comprising:
and obtaining an indoor air state point by utilizing indoor environment monitoring parameters, and stopping heat exchange treatment on the fresh air if the fresh air is fed to carry out heat exchange treatment when the air state point is determined to be positioned on a preset isenthalpic line.
9. The method of claim 1, wherein before obtaining the number of people in the target room using the outdoor carbon dioxide concentration and the indoor carbon dioxide concentration of the target room, and obtaining the temperature and humidity comparison result in the target room using the indoor temperature and humidity of the target room and an indoor temperature and humidity setting value, the method further comprises:
acquiring indoor environment data monitored by a mobile monitoring device at different regional positions in the target room, wherein the indoor environment data comprises: carbon dioxide concentration, temperature and humidity;
based on the indoor environment data monitored at different area positions, obtaining corrected values of carbon dioxide concentration, temperature and humidity;
and obtaining the indoor carbon dioxide concentration, the indoor temperature and the indoor humidity of the target room by using the corrected values of the carbon dioxide concentration, the temperature and the humidity.
10. The method of claim 1, further comprising:
and acquiring the monitored static pressure of the fresh air supply main pipe, and adjusting the frequency of the fresh air supply fan based on the static pressure.
11. The control device of the fresh air conditioning system is characterized by comprising:
the room number and temperature and humidity comparison result calculation obtaining module is used for obtaining the number of people in the target room by utilizing the outdoor carbon dioxide concentration and the indoor carbon dioxide concentration of the target room, obtaining the fresh air supply volume of the target room based on the obtained number of people, and obtaining a temperature and humidity comparison result in the target room by utilizing the indoor temperature and humidity of the target room and an indoor temperature and humidity set value;
and the control module is used for carrying out opening control on a fresh air valve of the target room based on the obtained fresh air supply quantity, the fresh air valve is used for adjusting the fresh air supply quantity of the target room, and carrying out frequency control on a fan coil unit of the target room by using the obtained temperature and humidity comparison result, and the fan coil unit is used for carrying out heat exchange on air in the target room.
12. A fresh air conditioning system, comprising:
a memory having an executable program stored thereon;
a processor for executing the executable program in the memory to implement the steps of the method of any one of claims 1-10.
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