CN114659247A - Online monitoring and adjusting method and system for multi-connected air conditioning system - Google Patents
Online monitoring and adjusting method and system for multi-connected air conditioning system Download PDFInfo
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 65
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- 238000009423 ventilation Methods 0.000 claims abstract description 59
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/52—Indication arrangements, e.g. displays
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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
- F24F11/56—Remote control
- F24F11/58—Remote control using Internet communication
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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
- F24F11/89—Arrangement or mounting of control or safety devices
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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
- F24F2110/12—Temperature of the outside air
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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
- F24F2110/20—Humidity
- F24F2110/22—Humidity of the outside air
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2120/00—Control inputs relating to users or occupants
- F24F2120/10—Occupancy
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Abstract
The invention discloses an online monitoring and adjusting method and system for a multi-connected air conditioning system, and relates to the technical field of air conditioners. In the invention, if any one of the conditions that the outdoor temperature is greater than a first preset threshold value, the indoor and outdoor temperature difference is greater than a second preset threshold value or the outdoor humidity is not in a comfortable range exists, the multi-connected air conditioning system is controlled to normally operate and the mechanical ventilation system is controlled to stop ventilation; otherwise: if the outdoor temperature is higher than a third preset threshold value, controlling the multi-connected air conditioning system to enter a ventilation mode and controlling the mechanical ventilation system to normally operate; and if the outdoor temperature is lower than a third preset threshold value, controlling the multi-connected air conditioning system to stop running, controlling the mechanical ventilation system to run according to the minimum air volume and performing natural ventilation. By monitoring operation data and reasonably considering temperature and humidity factors, the technical problem that the comfort level of indoor personnel is reduced due to the fact that air humidity is ignored by the combined operation strategy of the existing multi-connected air conditioning system and ventilation equipment in a building is solved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an online monitoring and adjusting method and system for a multi-connected air conditioning system.
Background
Along with the implementation of the policy of environmental protection, a multi-connected air conditioning system is adopted in the existing building to be matched with ventilation equipment in the building to regulate the temperature, so that the energy consumption of the air conditioner is effectively reduced, and the low-energy-consumption building is realized. However, the air humidity is neglected by the combined operation strategy of the existing multi-connected air conditioning system and the ventilation equipment in the building, the humidity of outdoor air is extremely high in transition seasons, such as spring, the humidity of outdoor air is too high, and if the temperature is adjusted by introducing the matching mode of fresh air and air conditioner, the indoor humidity is high, the ground is slippery, and indoor personnel are influenced to walk. In autumn, the humidity of outdoor air is low, and if the temperature is adjusted by introducing a matching mode of fresh air and an air conditioner, indoor drying is easily caused, so that the problems of dry skin and unsmooth breathing of indoor personnel are caused.
Disclosure of Invention
The invention aims to provide an online monitoring and adjusting method and system for a multi-connected air conditioning system, and aims to solve the technical problem that the comfort level of indoor personnel is reduced because air humidity is neglected by a combined operation strategy of the existing multi-connected air conditioning system and ventilation equipment in a building.
In order to achieve the purpose, the invention adopts the following technical scheme: the online monitoring and adjusting method of the multi-connected air conditioning system comprises the following steps: detecting an outdoor temperature, an indoor temperature and an outdoor humidity; if any one of the conditions that the outdoor temperature is greater than a first preset threshold value, the indoor and outdoor temperature difference is greater than a second preset threshold value or the outdoor humidity is not in a comfortable range exists, controlling the multi-connected air conditioning system to normally operate and controlling the mechanical ventilation system to stop ventilation; otherwise: if the outdoor temperature is higher than a third preset threshold value, controlling the multi-connected air conditioning system to enter a ventilation mode and controlling the mechanical ventilation system to normally operate; if the outdoor temperature is lower than a third preset threshold value, controlling the multi-connected air conditioning system to stop running, controlling the mechanical ventilation system to run according to the minimum air volume and performing natural ventilation; in the process, the first preset threshold is larger than the third preset threshold, the second preset threshold is 2-3 ℃, and the comfort range of the humidity is 40% -60%.
As an optional implementation manner, in the first aspect of the present invention, the method further includes: detecting the concentration of indoor CO2 and the indoor humidity in the state that the mechanical ventilation system stops ventilation; if the concentration of CO2 is too high, controlling the mechanical ventilation system to normally operate for ventilation, and when the concentration of CO2 is reduced to a normal range, controlling the mechanical ventilation system to stop ventilation; in the process of reducing the indoor CO2 concentration, if the indoor humidity is lower than the comfortable range, controlling the multi-connected air conditioning system to enter a humidifying mode; otherwise, controlling the multi-split air conditioner to maintain normal operation.
As an optional implementation manner, in the first aspect of the present invention, the solving process for the initial value of the third preset threshold includes the following steps:
step S21: establishing a target building model, and respectively solving a annual indoor basic temperature ta1 and an indoor natural ventilation temperature ta2 in a non-heating season according to the designed mechanical ventilation quantity;
step S22: defining a delta T1 | ta2-ta1|, and counting a delta T1 frequency distribution and a corresponding cumulative probability distribution in each month;
step S23: taking the cumulative probability as 90% to solve corresponding delta T1';
step S24: solving the outdoor temperature corresponding to the delta T1' according to the statistical chart to obtain a group of outdoor temperature sample data;
step S25: statistically analyzing the sample data, and solving an average value ta1 'and a standard error SE 1';
step S26: the third predetermined threshold is ta1 '± 2SE 1'.
As an optional implementation manner, in the first aspect of the present invention, the solving process for the initial value of the first preset threshold includes the following steps:
step S31: establishing a target building model, and solving the indoor ventilation temperature ta3 in the non-heating season of the whole year according to the designed mechanical ventilation quantity;
step S32: defining a delta T2 | ta3-ta2|, and counting a delta T2 frequency distribution and a corresponding cumulative probability distribution in each month;
step S33: taking the cumulative probability as 90% to solve corresponding delta T2';
step S34: solving the outdoor temperature corresponding to the delta T2' according to the statistical chart to obtain a group of outdoor temperature sample data;
step S35: statistically analyzing the sample data, and solving the average value ta2 'and the standard error SE 2'; step S36: the first predetermined threshold is ta2 '± 2SE 2'.
As an alternative embodiment, in the first aspect of the present invention, the mechanical ventilation system prompts the user to open the window for ventilation and/or activate the natural wind inducing device during the operation of the mechanical ventilation system according to the minimum air volume and the natural ventilation.
The invention discloses a second aspect of the online monitoring and adjusting system of the multi-connected air conditioning system, which comprises a mechanical ventilation system; a multi-connected air conditioning system; the central control platform is used for executing the steps of the online monitoring and adjusting method of the multi-connected air conditioning system in the first aspect of the invention; the mechanical ventilation control module is in communication connection with the central control platform and the mechanical ventilation system; the natural ventilation module is in communication connection with the central control platform and the natural wind induction device; the multi-connected air conditioner control module is in communication connection with the central control platform and the multi-connected air conditioner system; the indoor temperature sensor is arranged indoors and is in communication connection with the central control platform; the outdoor temperature sensor is arranged outdoors and is in communication connection with the central control platform; the indoor temperature sensor is arranged indoors and is in communication connection with the central control platform; the outdoor humidity sensor is arranged outdoors and is in communication connection with the central control platform; a CO2 monitor disposed indoors in communication with the central control platform; and the user interaction device is in communication connection with the central control platform.
As an optional implementation manner, in the second aspect of the present invention, the user interaction apparatus is an operation mode indication screen with a touch function.
One of the above technical solutions has the following advantages or beneficial effects:
in the embodiment of the invention, when the outdoor temperature is greater than the first preset threshold, the outdoor temperature is over high, the indoor heat load cannot be eliminated, and ventilation regulation is not suitable under the condition; when the indoor and outdoor temperature difference is greater than the second preset threshold value, the indoor and outdoor temperature difference is too large, the indoor temperature environment is easily broken, the cold and heat are uneven, and the comfort of indoor personnel is reduced, so that ventilation adjustment is not suitable under the condition; when the outdoor humidity is not in the comfortable range, it indicates that the outdoor air humidity is too humid or too dry, and if the outdoor humidity is introduced into the room, the problem of uncomfortable living, such as slippery humid ground or unsmooth breathing, is caused, and therefore, ventilation adjustment is not suitable in this case. Therefore, when any one of the conditions that the outdoor temperature is greater than a first preset threshold value, the indoor and outdoor temperature difference is greater than a second preset threshold value or the outdoor humidity is not in a comfortable range occurs, the multi-connected air conditioning system is controlled to normally operate, the mechanical ventilation system is controlled to stop ventilation, and temperature adjustment is performed only through the multi-connected air conditioning system, so that the comfort of indoor personnel is improved.
When the outdoor temperature is greater than the third preset threshold value, and any condition that the outdoor temperature is greater than the first preset threshold value, the indoor and outdoor temperature difference is greater than the second preset threshold value, or the outdoor humidity is not in the comfortable range does not exist, the multi-connected air conditioning system is controlled to enter the ventilation mode, and the mechanical ventilation system is controlled to normally operate, so that the indoor temperature can be adjusted in the mechanical ventilation mode, the comfort of indoor personnel is improved, and meanwhile, the energy consumption of the multi-connected air conditioning system is reduced. And when the outdoor temperature is lower than a third preset threshold value, controlling the multi-connected air conditioning system to stop running, controlling the mechanical ventilation system to run according to the minimum air volume, and performing natural ventilation, so that the multi-connected air conditioning system stops working, and the energy consumption of the multi-connected air conditioning system is further reduced.
In the embodiment of the invention, the operation data is monitored, the temperature and humidity factors are reasonably considered, the non-air-conditioning operation time in the transition season is prolonged by the mechanical ventilation system on the basis of meeting the comfort of indoor personnel, the operation energy consumption of the multi-connected air-conditioning system is reduced by adjusting the turn-on rate and setting the temperature, and the integral energy-saving operation of the building is realized.
Drawings
FIG. 1 is a schematic flow diagram of an operating strategy according to one embodiment of the present invention;
FIG. 2 is a schematic flow chart of an operating strategy of another embodiment of the present invention;
FIG. 3 is a diagram illustrating statistical data obtained during a process of obtaining a third predetermined threshold according to an embodiment of the present invention;
FIG. 4 is a diagram illustrating statistical data obtained during a process of obtaining a first predetermined threshold according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
The following describes an online monitoring and adapting method and system for a multi-connected air conditioning system according to an embodiment of the present invention with reference to fig. 1 to 4.
The composite fresh air of the invention is to utilize the self condition of the building to the maximum extent, and introduce the fresh air outside the building in a mode of alternative operation or simultaneous operation of natural ventilation and mechanical ventilation during the non-heating season, thereby meeting the requirements of health and comfort of indoor personnel. The temperature inside the building to which this embodiment is applied is generally in the range of 16-30 c, without extreme temperature conditions. The temperature inside the building typically changes slowly and does not fluctuate dramatically.
The embodiment of the invention comprises an online monitoring and adjusting system of a multi-connected air conditioning system, which comprises a mechanical ventilation system, the multi-connected air conditioning system, a central control platform, a mechanical ventilation control module, a natural ventilation module, a multi-connected air conditioning control module, an indoor temperature sensor, an outdoor temperature sensor, an indoor temperature sensor, an outdoor humidity sensor, a CO2 detector and a user interaction device, wherein the mechanical ventilation control module, the natural ventilation module, the multi-connected air conditioning control module, the indoor temperature sensor, the outdoor temperature sensor, the indoor humidity sensor, the CO2 detector and the user interaction device are in communication connection in an NB-ToT mode. And the mechanical ventilation control module is in communication connection with the mechanical ventilation system and is used for controlling the mechanical ventilation system according to the instruction of the central control platform. The natural ventilation module comprises a natural wind inducing device and a sensor for detecting natural ventilation. The multi-connected air conditioner control module is in communication connection with the multi-connected air conditioner system and is used for controlling the multi-connected air conditioner system according to instructions of the central control platform.
The indoor temperature sensor is arranged indoors, and the central control platform collects the indoor temperature through the indoor temperature sensor. The outdoor temperature sensor is arranged outdoors, and the central control platform collects the outdoor temperature through the outdoor temperature sensor. The indoor humidity sensor is arranged indoors, and the central control platform collects indoor humidity through the indoor humidity sensor. The outdoor humidity sensor is arranged outdoors, and the central control platform collects the outdoor humidity through the outdoor humidity sensor. CO22The monitor is arranged indoors and is a central control platformBy which to indoor CO2And collecting the concentration.
In some embodiments, the user interaction device includes a run mode indicator screen that interacts with the user by way of touch or buttons. For convenience of use, the operation mode indication screen can also be added with a voice interaction function.
The central control platform is used for executing a combined operation control method of the multi-connected air conditioning system and the composite fresh air. In the operation process of the central control platform, an indoor temperature sensor is used for detecting indoor temperature, an outdoor temperature sensor is used for detecting outdoor temperature, an outdoor humidity sensor is used for detecting outdoor humidity, an indoor humidity sensor is used for detecting indoor humidity and CO2Monitor for detecting indoor CO2And (4) concentration.
The central control platform controls the mechanical ventilation system, the multi-connected air conditioning system and the natural ventilation module according to the indoor temperature, the outdoor temperature and the outdoor humidity. Referring to fig. X, the operation strategy is:
if any one of the conditions that the outdoor temperature is greater than a first preset threshold value, the indoor and outdoor temperature difference is greater than a second preset threshold value or the outdoor humidity is not in a comfortable range exists, controlling the multi-connected air conditioning system to normally operate and controlling the mechanical ventilation system to stop ventilation; otherwise:
if the outdoor temperature is higher than a third preset threshold value, controlling the multi-connected air conditioning system to enter a ventilation mode and controlling the mechanical ventilation system to normally operate;
if the outdoor temperature is lower than a third preset threshold value, controlling the multi-connected air conditioning system to stop running, controlling the mechanical ventilation system to run according to the minimum air volume and performing natural ventilation;
in the process, the first preset threshold is larger than the third preset threshold, the second preset threshold is 2-3 ℃, and the comfort range of the humidity is 40% -60%.
In the embodiment of the invention, when the outdoor temperature is greater than the first preset threshold, the outdoor temperature is over high, the indoor heat load cannot be eliminated, and ventilation adjustment is not suitable in the case; when the indoor and outdoor temperature difference is greater than the second preset threshold value, the indoor and outdoor temperature difference is too large, the indoor temperature environment is easily broken, the cold and heat are uneven, and the comfort of indoor personnel is reduced, so that ventilation adjustment is not suitable under the condition; when the outdoor humidity is not in the comfortable range, the humidity of the outdoor air is too humid or too dry, and if the humidity is introduced into the room, the problem of inhabitation discomfort such as slippery ground or unsmooth breathing is brought, so that ventilation adjustment is not suitable in the case. Therefore, when any one of the conditions that the outdoor temperature is greater than a first preset threshold value, the indoor and outdoor temperature difference is greater than a second preset threshold value or the outdoor humidity is not in a comfortable range occurs, the multi-connected air conditioning system is controlled to normally operate, the mechanical ventilation system is controlled to stop ventilation, and temperature adjustment is performed only through the multi-connected air conditioning system, so that the comfort of indoor personnel is improved.
When the outdoor temperature is higher than a third preset threshold value, and any condition that the outdoor temperature is higher than the first preset threshold value, the indoor and outdoor temperature difference is higher than the second preset threshold value or the outdoor humidity is not in a comfortable range does not exist, the multi-connected air conditioning system is controlled to enter a ventilation mode, and the mechanical ventilation system is controlled to normally operate. And when the outdoor temperature is lower than a third preset threshold value, controlling the multi-connected air conditioning system to stop running, controlling the mechanical ventilation system to run according to the minimum air volume, and performing natural ventilation, so that the multi-connected air conditioning system stops working, and the energy consumption of the multi-connected air conditioning system is further reduced.
In the embodiment of the invention, the operation data is monitored, on the basis of meeting the comfort of indoor personnel, the non-air-conditioning operation time in the transition season is prolonged by the mechanical ventilation system, and the operation energy consumption of the multi-connected air-conditioning system is reduced by adjusting the on-time rate and setting the temperature, so that the integral energy-saving operation of the building is realized.
Based on the operation strategy of the above embodiment, a preferred embodiment: the central control platform is used for controlling the indoor temperature, the outdoor humidity, the indoor humidity and the indoor CO according to the indoor temperature, the outdoor humidity and the indoor CO2And the concentration controls a mechanical ventilation system, a multi-connected air conditioning system and a natural ventilation module. Referring to fig. X, the operation strategy further includes:
detecting indoor CO in the state that the mechanical ventilation system stops ventilation2Concentration and indoor humidity;
if CO is present2Controlling the mechanical ventilation system to normally operate for ventilation when the concentration is too high, and controlling the mechanical ventilation system to ventilate when the concentration is too high2After the concentration is reduced to a normal range, controlling the mechanical ventilation system to stop ventilation;
in the above-mentioned reduction of indoor CO2In the concentration process, if the indoor humidity is lower than the comfortable range, controlling the multi-connected air conditioning system to enter a humidifying mode; otherwise, controlling the multi-split air conditioner to maintain normal operation.
In particular, CO2The normal range is 400-700PPM, and when the normal range is beyond the range, the indoor CO is considered to be2Too high concentration requires a mechanical ventilation system for ventilation to improve the comfort of the personnel in the room. Wherein, when mechanical ventilation system let in outdoor air indoor after, indoor humidity is less than comfortable scope, and at this moment, indoor personnel appear breathing smoothly easily, and the dry condition of skin takes place. Thus, reducing indoor CO2In the concentration process, when the indoor humidity is lower than the comfortable range, the multi-connected air conditioning system is controlled to enter a humidifying mode so as to increase the indoor humidity and further improve the comfort of indoor personnel.
The key of the two operation strategies is to determine a first preset threshold of outdoor temperature, a third preset threshold of outdoor temperature and a second preset threshold of indoor and outdoor temperature difference. The second preset threshold value is mainly used for investigating indoor and outdoor temperature difference, and the physical meaning of the second preset threshold value is that when the indoor temperature is higher than the outdoor temperature and the outdoor temperature is calculated to be proper, outdoor fresh air can be directly introduced to eliminate indoor heat load, and the value can be 2-3 ℃ generally. The preset outdoor temperature threshold value is obtained through calculation, so that the multi-connected air conditioning system, the mechanical ventilation system and fresh air can jointly run in a specific target building and be in an optimal state.
The solving process of the initial value of the third preset threshold comprises the following steps:
step S21: establishing a target building model, and respectively solving the annual indoor base temperature ta according to the designed mechanical ventilation1In non-heating seasonsNatural ventilation temperature ta in the compartment2；
Step S22: definition of Δ T1＝|ta2-ta1L, statistics of each month Δ T1Frequency distributions and corresponding cumulative probability distributions;
step S23: solving corresponding delta T by taking the cumulative probability as 90 percent1′；
Step S24: solving for Δ T from a statistical map1Acquiring a group of outdoor temperature sample data corresponding to the outdoor temperature;
step S25: statistically analyzing the sample data, and solving the average value ta1' and standard error SE1′；
Step S26: the third preset threshold is taken as ta1′±2SE1′。
Specifically, in one embodiment, the method for solving the third predetermined threshold value using the sea as an example is shown in fig. X, and the control point for solving the third predetermined threshold value of the outdoor temperature in 5 months is (20.3 ± 0.5) ° c according to the above steps in conjunction with fig. 3.
The initial value solving process of the first preset threshold comprises the following steps:
step S31: establishing a target building model, and solving the indoor ventilation temperature ta in non-heating seasons of the whole year according to the designed mechanical ventilation quantity3；
Step S32: definition of Δ T2＝|ta3-ta2L, statistics of each month Δ T2Frequency distributions and corresponding cumulative probability distributions;
step S33: solving corresponding delta T by taking the cumulative probability as 90 percent2′；
Step S34: solving for Δ T from a statistical map2Acquiring a group of outdoor temperature sample data corresponding to the outdoor temperature;
step S35: statistically analyzing the sample data, and solving the average value ta2' and standard error SE2′；
Step S36: the first preset threshold is taken as ta2′±2SE2′。
Specifically, in one embodiment, the method for solving the first predetermined threshold is shown in fig. X, and the control point for solving the third predetermined threshold of the outdoor temperature in 5 months is (23.9 ± 0.9) ° c according to the above steps in conjunction with fig. 4.
According to the method, different temperature thresholds of each month in the transition season can be solved respectively, so that a combined operation control strategy can be obtained, and the initial control values of the related thresholds are summarized as shown in table 1. The control strategy in this embodiment is combined with the threshold solving process, so that the user experience is guaranteed, and the energy consumption can be remarkably reduced.
TABLE 1 transition season mixed ventilation strategy outdoor temperature control table
In the process that the mechanical ventilation system is operated according to the minimum air quantity on-off and performs natural ventilation, the central control platform prompts a user to open a window through the operation mode indicating screen. If the building is equipped with a natural draft inducing device, the natural draft effect is enhanced using the device.
Other configurations and operations of the online monitoring and adapting method and system for a multi-connected air conditioning system according to an embodiment of the present invention are known to those skilled in the art, and will not be described in detail herein.
In the description herein, references to the description of the terms "embodiment," "example," etc., mean 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 invention. 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.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (7)
1. The on-line monitoring and adjusting method of the multi-connected air conditioning system is characterized in that: the method comprises the following steps:
detecting outdoor temperature, indoor temperature and outdoor humidity;
if any one of the conditions that the outdoor temperature is greater than a first preset threshold value, the indoor and outdoor temperature difference is greater than a second preset threshold value or the outdoor humidity is not in a comfortable range exists, controlling the multi-connected air conditioning system to normally operate and controlling the mechanical ventilation system to stop ventilation; otherwise:
if the outdoor temperature is higher than a third preset threshold value, controlling the multi-connected air conditioning system to enter a ventilation mode and controlling the mechanical ventilation system to normally operate;
if the outdoor temperature is lower than a third preset threshold value, controlling the multi-connected air conditioning system to stop running, controlling the mechanical ventilation system to run according to the minimum air volume and performing natural ventilation;
in the process, the first preset threshold is larger than the third preset threshold, the second preset threshold is 2-3 ℃, and the comfort range of the humidity is 40% -60%.
2. The online monitoring and adapting method for the multi-connected air conditioning system according to claim 1, wherein: further comprising:
detecting indoor CO in the state that the mechanical ventilation system stops ventilation2Concentration and indoor humidity;
if CO is present2Controlling the mechanical ventilation system to normally operate for ventilation when the concentration is too high, and controlling the mechanical ventilation system to ventilate when the concentration is too high2After the concentration is reduced to a normal range, controlling the mechanical ventilation system to stop ventilation;
in the above-mentioned reduction of indoor CO2In the concentration process, if the indoor humidity is lower than the comfortable range, controlling the multi-connected air conditioning system to enter a humidifying mode; otherwise, controlling the multi-split air conditioner to maintain normal operation.
3. The online monitoring and adapting method for the multi-connected air conditioning system according to claim 1, wherein: the solving process of the initial value of the third preset threshold comprises the following steps:
step S21: establishing a target building model, and respectively solving the annual indoor base temperature ta according to the designed mechanical ventilation1Indoor natural ventilation temperature ta in non-heating season2；
Step S22: definition of Δ T1＝|ta2-ta1L, statistics of each month Δ T1Frequency distributions and corresponding cumulative probability distributions;
step S23: solving corresponding delta T by taking the cumulative probability as 90 percent1′；
Step S24: solving for Δ T from a statistical map1Acquiring a group of outdoor temperature sample data corresponding to the outdoor temperature;
step S25: statistically analyzing the sample data, and solving the average value ta1' and standard error SE1′；
Step S26: the third preset threshold is taken as ta1′±2SE1′。
4. The online monitoring and adapting method for the multi-connected air conditioning system according to claim 3, wherein the online monitoring and adapting method comprises the following steps: the initial value solving process of the first preset threshold comprises the following steps:
step S31: establishing a target building model, and solving the indoor ventilation temperature ta in the non-heating seasons of the whole year according to the designed mechanical ventilation quantity3；
Step S32: definition of Δ T2＝|ta3-ta2L, statistics of Δ T per month2Frequency distributions and corresponding cumulative probability distributions;
step S33: solving corresponding delta T by taking the cumulative probability as 90 percent2′；
Step S34: solving for Δ T from statistical plots2Acquiring a group of outdoor temperature sample data corresponding to the outdoor temperature;
step S35: statistically analyzing the sample data, and solving the average value ta2' and standard error SE2′；
Step S36: the first preset threshold is taken as ta2′±2SE2′。
5. The online monitoring and adapting method for the multi-connected air conditioning system according to claim 1, wherein: and prompting a user to open a window for ventilation and/or start the natural wind induction device in the process of operating the mechanical ventilation system according to the on-off of the minimum air quantity and performing natural ventilation.
6. The online monitoring and adjusting system of the multi-connected air conditioning system is characterized in that: comprises that
A mechanical ventilation system;
a multi-connected air conditioning system;
a central control platform for executing the steps of the online monitoring and adapting method of the multi-connected air conditioning system of any one of claims 1 to 5;
the mechanical ventilation control module is in communication connection with the central control platform and the mechanical ventilation system;
the natural ventilation module is in communication connection with the central control platform and the natural wind induction device;
the multi-connected air conditioner control module is in communication connection with the central control platform and the multi-connected air conditioner system;
the indoor temperature sensor is arranged indoors and is in communication connection with the central control platform;
the outdoor temperature sensor is arranged outdoors and is in communication connection with the central control platform;
the indoor temperature sensor is arranged indoors and is in communication connection with the central control platform;
the outdoor humidity sensor is arranged outdoors and is in communication connection with the central control platform;
CO2the monitor is arranged indoors and is in communication connection with the central control platform;
and the user interaction device is in communication connection with the central control platform.
7. The online monitoring and adapting system of a multi-connected air conditioning system according to claim 6, wherein: the user interaction device is an operation mode indication screen with a touch control function.
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