CN118089216B - Indoor environment detection-based air conditioner fresh air quantity control method and system - Google Patents
Indoor environment detection-based air conditioner fresh air quantity control method and system Download PDFInfo
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Abstract
The invention discloses an air conditioner fresh air quantity control method and system based on indoor environment detection, which relate to the technical field of air conditioners and comprise the following steps: evaluating the temperature maintaining capacity and the humidity maintaining capacity of the indoor space to obtain a basic heat preservation coefficient and a basic moisture preservation coefficient of the indoor space; evaluating the heat preservation and moisture preservation performance of the indoor space; based on the heat preservation and moisture preservation performance of the indoor space, analyzing the temperature and humidity change of the indoor space; calculating the temperature-optimum fresh air quantity and the humidity-optimum fresh air quantity of the indoor space based on the set temperature and humidity; and comprehensively fitting the optimal fresh air quantity of the indoor space based on the optimal fresh air quantity of the indoor space and the optimal fresh air quantity of the humidity. The invention has the advantages that: the indoor environment change is evaluated by combining multiple factors, so that the fresh air quantity of the fresh air conditioner can be analyzed and predicted in advance, the indoor environment can be accurately regulated and controlled, the comfort level of the indoor environment is ensured, and the service performance of the fresh air conditioner is greatly improved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner fresh air quantity control method and system based on indoor environment detection.
Background
The fresh air conditioner is a healthy and comfortable air conditioner with a fresh air function, and utilizes a centrifugal fan to realize ventilation and ventilation between room air and outdoor air, and has the function of purifying air, and the fresh air conditioner can introduce the outdoor oxygen-enriched air into a room through purification, so that the oxygen content and the freshness of the indoor air are increased.
In the use process of the fresh air conditioner, as the fresh air conditioner is influenced by an external space on the indoor environment, for example, when the temperature and the humidity of the external space are high, the fresh air function can synchronously lead to the temperature rise and the humidity reduction of the indoor space, and when the fresh air function is used, the air conditioner in the prior art lacks comprehensive detection on the indoor environment, only relies on collected environment temperature and humidity data to predict and regulate the fresh air quantity of the air conditioner, lacks comprehensive analysis on the indoor environment, and is difficult to achieve the best when the indoor environment is regulated.
Disclosure of Invention
In order to solve the technical problems, the technical scheme provides an air conditioner fresh air quantity control method and system based on indoor environment detection, and solves the problems that when an air conditioner in the prior art is used for fresh air function, comprehensive detection on indoor environment is lacking, the fresh air quantity of the air conditioner is predicted and regulated only by means of collected environment temperature and humidity data, comprehensive analysis on indoor environment is lacking, and the indoor environment is difficult to achieve the best when regulated.
In order to achieve the above purpose, the invention adopts the following technical scheme:
An air conditioner fresh air quantity control method based on indoor environment detection comprises the following steps:
based on construction materials of the indoor space, evaluating the temperature maintaining capacity and the humidity maintaining capacity of the indoor space to obtain a basic heat preservation coefficient and a basic moisture preservation coefficient of the indoor space;
based on the basic heat preservation coefficient and the basic moisture preservation coefficient of the indoor space, evaluating the heat preservation and moisture preservation performance of the indoor space;
based on the heat preservation and moisture preservation performance of the indoor space, analyzing the temperature and humidity change of the indoor space;
calculating the temperature-optimum fresh air quantity and the humidity-optimum fresh air quantity of the indoor space through the temperature-humidity change of the indoor space based on the set temperature and humidity;
And comprehensively fitting the optimal fresh air quantity of the indoor space based on the optimal fresh air quantity of the indoor space and the optimal fresh air quantity of the humidity.
Preferably, based on the construction material of the indoor space, evaluating the temperature maintaining capability and the humidity maintaining capability of the indoor space, the obtaining the basic heat preservation coefficient and the basic moisture preservation coefficient of the indoor space specifically includes:
Collecting construction material parameters of an indoor space, and determining the thermal conductivity and the water vapor permeation resistance of the indoor space construction material according to the construction material parameters of the indoor space;
Calculating a basic heat insulation coefficient of the indoor space through a heat insulation evaluation formula based on the heat conductivity coefficient of the indoor space construction material;
Calculating a basic moisture retention coefficient of temperature and humidity through a moisture retention evaluation formula based on the water vapor permeation resistance of the indoor space construction material;
Wherein, the heat preservation evaluation formula and the moisture preservation evaluation formula specifically are: ，
In the method, in the process of the invention, Is the basic heat preservation coefficient of the indoor space,/>Is the basic moisture retention coefficient of warm and humid/(Build material thickness for j-th layer of indoor space,/>Thermal conductivity of material for j-th layer of indoor space,/>The water vapor permeation resistance of the j-th indoor space building material is provided, and m is the number of building material layers of the indoor space wall.
Preferably, the evaluating the heat and moisture insulation performance of the indoor space based on the basic heat insulation coefficient and the basic moisture insulation coefficient of the indoor space specifically includes:
Determining the surface area of each wall surface of the indoor space based on the construction size of the indoor space;
determining the heat loss ratio of the indoor space by utilizing an indoor space temperature performance evaluation formula based on the surface area of the indoor space, the basic heat preservation coefficient of the indoor space and the indoor temperature and outdoor temperature of the indoor space;
Determining the humidity exchange ratio of the indoor space by utilizing an indoor space humidity performance evaluation formula based on the surface area of the indoor space, the basic moisture retention coefficient of the indoor space and the indoor and outdoor vapor pressure difference of the indoor space;
The indoor space temperature performance evaluation formula specifically comprises: ；
The indoor space humidity performance evaluation formula specifically comprises: ；
In the method, in the process of the invention, For the heat loss ratio,/>For humidity exchange ratio,/>Is the indoor temperature of the indoor space,/>Is the water vapor pressure of the indoor space,/>To construct the surface area of the ith wall surface of the indoor space,/>To construct the basic heat preservation coefficient of the ith wall surface of the indoor space,/>To construct the basic moisture retention coefficient of the ith wall surface of the indoor space,/>To construct the outside temperature of the ith wall surface of the indoor space,/>To construct the outside vapor pressure of the i-th wall surface of the indoor space.
Preferably, based on the heat preservation and moisture preservation performance of the indoor space, analyzing the temperature and humidity change of the indoor space specifically includes:
collecting the temperature and humidity of the outer side of each wall surface of the indoor space in real time;
Based on the acquired temperature and humidity of the outer side of the wall surface, predicting the temperature and humidity of the outer side of the wall surface in a linear or nonlinear regression mode;
Substituting the predicted wall surface outside temperature and humidity into an indoor space temperature performance evaluation formula and an indoor space humidity performance evaluation formula to respectively obtain a predicted heat loss ratio and a predicted humidity exchange ratio;
Based on the predicted heat loss ratio and humidity exchange ratio, an indoor space temperature prediction model and an indoor space humidity prediction model are constructed;
The indoor space temperature prediction model is as follows: ，
The indoor space humidity prediction model is as follows: ，
In the method, in the process of the invention, For the predicted indoor space temperature at time t,/>For the predicted indoor space humidity at time t,/>For the predicted heat loss ratio at time t,/>For the predicted humidity exchange ratio at time t,/>For the indoor space temperature at the current moment,/>For the indoor space humidity at the current moment,/>Is the heat exchange coefficient of fresh air,/>Is the fresh air humidity exchange coefficient,/>Is fresh air flow rate/>Is the time of day.
Preferably, based on the collected temperature and humidity of the outer side of the wall, a linear or nonlinear regression mode is adopted to predict the temperature and humidity of the outer side of the wall, and the method specifically comprises the following steps:
marking a temperature-time scatter diagram and a humidity-time scatter diagram in a plane rectangular coordinate system based on the acquired temperature and humidity of the outer side of the wall surface;
Based on the temperature-time scatter diagram and the humidity-time scatter diagram, adopting linear regression fit or nonlinear regression fit to obtain a temperature-time fit equation And humidity-time fitting equation/>。
Preferably, the calculating the temperature-most-suitable fresh air volume and the humidity-most-suitable fresh air volume of the indoor space based on the set temperature and humidity through the temperature-humidity change of the indoor space specifically includes:
based on the indoor space temperature prediction model and the set temperature, an indoor temperature equation is constructed, and the indoor temperature equation is solved to obtain the most proper fresh air quantity of temperature;
based on the indoor space humidity prediction model and the set humidity, an indoor humidity equation is constructed, and the indoor humidity equation is solved to obtain the optimal fresh air quantity of humidity;
Wherein, the indoor temperature equation is: ，
the indoor humidity equation is: ，
Wherein, For a set temperature,/>Is set to a set humidity.
Preferably, the fitting the optimal fresh air volume of the indoor space based on the optimal fresh air volume of the indoor space and the optimal fresh air volume of the humidity specifically includes:
constructing a fresh air output evaluation formula based on the temperature-optimum fresh air quantity and the humidity-optimum fresh air quantity;
Solving the fresh air flow rate when the fresh air output evaluation formula outputs the minimum, namely the optimal fresh air quantity of the indoor space;
Wherein, the fresh air output evaluation formula is: ，
In the method, in the process of the invention, For/>Output value of corresponding fresh air output evaluation formula,/>For the fresh air flow at time t,/>Is the most proper fresh air quantity of the temperature at the time t/>For the most proper humidity fresh air quantity at time t,/>Is a humidity weight value.
Further, an air conditioner fresh air volume control system based on indoor environment detection is provided, which is used for implementing the air conditioner fresh air volume control method based on indoor environment detection, and includes:
An environment monitoring module for monitoring the temperature and humidity of the indoor space and the outdoor space;
The space evaluation module is used for evaluating the temperature maintaining capacity and the humidity maintaining capacity of the indoor space based on the building materials of the indoor space to obtain a basic heat preservation coefficient and a basic moisture preservation coefficient of the indoor space, and evaluating the heat preservation and moisture preservation performance of the indoor space based on the basic heat preservation coefficient and the basic moisture preservation coefficient of the indoor space;
the temperature analysis module is electrically connected with the space evaluation module and the environment monitoring module and is used for analyzing the temperature change of the indoor space based on the indoor space heat preservation performance of the indoor space and calculating the temperature optimum fresh air quantity of the indoor space through the temperature change of the indoor space based on the set temperature;
The humidity analysis module is electrically connected with the space evaluation module and the environment monitoring module, and is used for analyzing the humidity change of the indoor space based on the indoor space heat preservation performance of the indoor space and calculating the humidity optimal fresh air quantity of the indoor space through the humidity change of the indoor space based on the set humidity;
The fresh air quantity calculation module is electrically connected with the temperature analysis module and the humidity analysis module, and is used for comprehensively fitting out the optimal fresh air quantity of the indoor space based on the optimal fresh air quantity of the indoor space and the optimal fresh air quantity of the humidity.
Compared with the prior art, the invention has the beneficial effects that:
The invention provides an air conditioner fresh air quantity control scheme based on indoor environment detection, which is used for evaluating the heat preservation and moisture preservation performance of an indoor space by combining with various factors such as construction of the indoor environment, temperature difference between the indoor environment and the outdoor environment, and the like, and predicting the fresh air quantity of a fresh air conditioner by analyzing in advance based on the heat preservation and moisture preservation performance of the indoor space and the temperature and humidity difference between the indoor environment and the outdoor environment, so that the indoor space reaches the balance between the optimal temperature and the optimal humidity, the accurate regulation and control of the indoor environment are realized, the comfort level of the indoor environment is ensured, and the service performance of the fresh air conditioner is greatly improved.
Drawings
Fig. 1 is a flow chart of an air conditioner fresh air quantity control method based on indoor environment detection according to the scheme;
FIG. 2 is a flow chart of a method for obtaining a basic heat preservation coefficient and a basic moisture preservation coefficient of an indoor space according to the scheme;
FIG. 3 is a flow chart of a method for evaluating the heat preservation and moisture preservation performance of an indoor space according to the scheme;
FIG. 4 is a flow chart of a method for analyzing the temperature and humidity changes of the indoor space based on the heat preservation and humidity preservation performance of the indoor space provided by the scheme;
FIG. 5 is a flow chart of a method for predicting the temperature and humidity of the outer side of a wall surface according to the scheme;
FIG. 6 is a flow chart of a method for calculating the temperature-optimum fresh air quantity and the humidity-optimum fresh air quantity of an indoor space according to the scheme;
fig. 7 is a flowchart of a method for comprehensively fitting out the optimal fresh air quantity of the indoor space according to the scheme.
Detailed Description
The following description is presented to enable one of ordinary skill in the art to make and use the invention. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art.
Referring to fig. 1, a method for controlling fresh air volume of an air conditioner based on indoor environment detection includes:
based on construction materials of the indoor space, evaluating the temperature maintaining capacity and the humidity maintaining capacity of the indoor space to obtain a basic heat preservation coefficient and a basic moisture preservation coefficient of the indoor space;
based on the basic heat preservation coefficient and the basic moisture preservation coefficient of the indoor space, evaluating the heat preservation and moisture preservation performance of the indoor space;
based on the heat preservation and moisture preservation performance of the indoor space, analyzing the temperature and humidity change of the indoor space;
calculating the temperature-optimum fresh air quantity and the humidity-optimum fresh air quantity of the indoor space through the temperature-humidity change of the indoor space based on the set temperature and humidity;
And comprehensively fitting the optimal fresh air quantity of the indoor space based on the optimal fresh air quantity of the indoor space and the optimal fresh air quantity of the humidity.
The scheme combines the construction of the indoor environment, the heat preservation and moisture preservation performance of the indoor space is evaluated by various factors such as the temperature difference between the indoor and the outdoor, and the fresh air quantity of the fresh air conditioner is predicted by analyzing in advance based on the heat preservation and moisture preservation performance of the indoor space and the temperature and humidity difference between the indoor and the outdoor, so that the indoor space reaches the balance between the optimal temperature and the optimal humidity, and the accurate regulation and control of the indoor environment are realized.
Referring to fig. 2, based on the construction material of the indoor space, evaluating the temperature maintaining capability and the humidity maintaining capability of the indoor space, the obtaining the basic heat preservation coefficient and the basic humidity preservation coefficient of the indoor space specifically includes:
Collecting construction material parameters of an indoor space, and determining the thermal conductivity and the water vapor permeation resistance of the indoor space construction material according to the construction material parameters of the indoor space;
Calculating a basic heat insulation coefficient of the indoor space through a heat insulation evaluation formula based on the heat conductivity coefficient of the indoor space construction material;
Calculating a basic moisture retention coefficient of temperature and humidity through a moisture retention evaluation formula based on the water vapor permeation resistance of the indoor space construction material;
Wherein, the heat preservation evaluation formula and the moisture preservation evaluation formula specifically are: ，
In the method, in the process of the invention, Is the basic heat preservation coefficient of the indoor space,/>Is the basic moisture retention coefficient of warm and humid/(Build material thickness for j-th layer of indoor space,/>Thermal conductivity of material for j-th layer of indoor space,/>The water vapor permeation resistance of the j-th indoor space building material is provided, and m is the number of building material layers of the indoor space wall.
It can be understood that based on parameters of the indoor space construction material, the basic heat preservation coefficient and the basic moisture preservation coefficient of the indoor space are calculated, and the method is of great importance to the temperature and humidity regulation of the indoor space, and is helpful for making an effective air conditioner temperature and humidity regulation plan, ensuring the balance between the optimal temperature and the optimal humidity of the indoor space and realizing the accurate regulation of the indoor environment.
Referring to fig. 3, based on the basic heat preservation coefficient and the basic moisture preservation coefficient of the indoor space, the evaluation of the heat preservation and moisture preservation performance of the indoor space specifically includes:
Determining the surface area of each wall surface of the indoor space based on the construction size of the indoor space;
determining the heat loss ratio of the indoor space by utilizing an indoor space temperature performance evaluation formula based on the surface area of the indoor space, the basic heat preservation coefficient of the indoor space and the indoor temperature and outdoor temperature of the indoor space;
Determining a humidity exchange ratio of the indoor space by utilizing an indoor space humidity performance evaluation formula based on the surface area of the indoor space, a basic moisturizing coefficient of the indoor space and indoor and outdoor steam pressures of the indoor space;
The indoor space temperature performance evaluation formula specifically comprises: ；
The indoor space humidity performance evaluation formula specifically comprises: ；
In the method, in the process of the invention, For the heat loss ratio,/>For humidity exchange ratio,/>Is the indoor temperature of the indoor space,/>Is the water vapor pressure of the indoor space,/>To construct the surface area of the ith wall surface of the indoor space,/>To construct the basic heat preservation coefficient of the ith wall surface of the indoor space,/>To construct the basic moisture retention coefficient of the ith wall surface of the indoor space,/>To construct the outside temperature of the ith wall surface of the indoor space,/>To construct the outside vapor pressure of the i-th wall surface of the indoor space.
The heat loss and humidity exchange condition of the indoor space can be accurately estimated by combining the surface area of the indoor space, the basic heat preservation and moisture preservation coefficient and the indoor and outdoor temperature and humidity difference, so that basic temperature and humidity exchange basic indexes are provided for optimizing the control strategy of the indoor space.
Referring to fig. 4, based on the heat and humidity preservation performance of the indoor space, analyzing the temperature and humidity change of the indoor space specifically includes:
collecting the temperature and humidity of the outer side of each wall surface of the indoor space in real time;
Based on the acquired temperature and humidity of the outer side of the wall surface, predicting the temperature and humidity of the outer side of the wall surface in a linear or nonlinear regression mode;
Substituting the predicted wall surface outside temperature and humidity into an indoor space temperature performance evaluation formula and an indoor space humidity performance evaluation formula to respectively obtain a predicted heat loss ratio and a predicted humidity exchange ratio;
Based on the predicted heat loss ratio and humidity exchange ratio, an indoor space temperature prediction model and an indoor space humidity prediction model are constructed;
The indoor space temperature prediction model is as follows: ，
The indoor space humidity prediction model is as follows: ，
In the method, in the process of the invention, For the predicted indoor space temperature at time t,/>For the predicted indoor space humidity at time t,/>For the predicted heat loss ratio at time t,/>For the predicted humidity exchange ratio at time t,/>For the indoor space temperature at the current moment,/>For the indoor space humidity at the current moment,/>Is the heat exchange coefficient of fresh air,/>Is the fresh air humidity exchange coefficient,/>Is fresh air flow rate/>Is the time of day.
In the scheme, the effect of the fresh air system is comprehensively evaluated by combining the basic temperature and humidity interaction rate of the indoor space and the mode of the internal and external temperature and humidity interaction during starting of the fresh air system, so that the temperature and humidity change in the indoor space in the future is predicted, and a scientific basis is provided for indoor space environment control.
Referring to fig. 5, based on the collected temperature and humidity of the outside of the wall, the method of linear or nonlinear regression is used to predict the temperature and humidity of the outside of the wall, which specifically includes:
marking a temperature-time scatter diagram and a humidity-time scatter diagram in a plane rectangular coordinate system based on the acquired temperature and humidity of the outer side of the wall surface;
Based on the temperature-time scatter diagram and the humidity-time scatter diagram, adopting linear regression fit or nonlinear regression fit to obtain a temperature-time fit equation And humidity-time fitting equation/>。
Referring to fig. 6, calculating the temperature-optimum fresh air volume and the humidity-optimum fresh air volume of the indoor space based on the set temperature and humidity by the temperature-humidity change of the indoor space specifically includes:
based on the indoor space temperature prediction model and the set temperature, an indoor temperature equation is constructed, and the indoor temperature equation is solved to obtain the most proper fresh air quantity of temperature;
based on the indoor space humidity prediction model and the set humidity, an indoor humidity equation is constructed, and the indoor humidity equation is solved to obtain the optimal fresh air quantity of humidity;
Wherein, indoor temperature equation is: ，
The indoor humidity equation is: ，
Wherein, For a set temperature,/>Is set to a set humidity.
The change of the temperature and the humidity of the indoor space is related to time, so that the solved temperature-optimum fresh air quantity and the solved humidity-optimum fresh air quantity are also change functions taking time as independent variables, and basic data support can be provided for calculating the fresh air quantity of the air conditioner by calculating the fresh air exchange flow of the indoor space when the temperature and the humidity of the indoor space reach the set temperature and the set humidity and taking the temperature-optimum fresh air quantity and the humidity-optimum fresh air quantity of the indoor space as data anchor points for fresh air quantity regulation.
Referring to fig. 7, based on the temperature-optimum fresh air volume and the humidity-optimum fresh air volume of the indoor space, the comprehensive fitting of the optimum fresh air volume of the indoor space specifically includes:
constructing a fresh air output evaluation formula based on the temperature-optimum fresh air quantity and the humidity-optimum fresh air quantity;
Solving the fresh air flow rate when the fresh air output evaluation formula outputs the minimum, namely the optimal fresh air quantity of the indoor space;
The new air output evaluation formula is as follows: ，
In the method, in the process of the invention, For/>Output value of corresponding fresh air output evaluation formula,/>For the fresh air flow at time t,/>Is the most proper fresh air quantity of the temperature at the time t/>For the most proper humidity fresh air quantity at time t,/>Is a humidity weight value.
The humidity weight value is understood to represent the regulation and control emphasis of the indoor space on the temperature and humidity, when the indoor space emphasis regulates and controls the temperature, the humidity weight value is reduced, and when the indoor space emphasis regulates and controls the humidity, the humidity weight value is increased;
The vector distance between the fresh air flow at the time t and the temperature and humidity optimum fresh air quantity at the time t is calculated, so that the vector distance can be comprehensively fitted, the temperature and humidity of the indoor space can reach the fresh air quantity with the optimal dynamic balance, the fresh air quantity is used for air conditioning regulation and control, the dynamic balance accurate regulation and control of the indoor environment can be effectively realized, and the comfort level of the indoor environment is ensured.
Furthermore, based on the same inventive concept as the air conditioner fresh air volume control method based on indoor environment detection, the present disclosure proposes an air conditioner fresh air volume control system based on indoor environment detection, including:
the environment monitoring module is used for monitoring the temperature and the humidity of the indoor space and the outdoor space;
the space evaluation module is used for evaluating the temperature maintaining capacity and the humidity maintaining capacity of the indoor space based on the building materials of the indoor space to obtain a basic heat preservation coefficient and a basic moisture preservation coefficient of the indoor space, and evaluating the heat preservation and moisture preservation performance of the indoor space based on the basic heat preservation coefficient and the basic moisture preservation coefficient of the indoor space;
the temperature analysis module is electrically connected with the space evaluation module and the environment monitoring module and is used for analyzing the temperature change of the indoor space based on the indoor space heat preservation performance of the indoor space and calculating the temperature optimum fresh air quantity of the indoor space through the temperature change of the indoor space based on the set temperature;
The humidity analysis module is electrically connected with the space evaluation module and the environment monitoring module, and is used for analyzing the humidity change of the indoor space based on the indoor space heat preservation performance of the indoor space and calculating the humidity optimal fresh air quantity of the indoor space through the humidity change of the indoor space based on the set humidity;
The fresh air quantity calculation module is electrically connected with the temperature analysis module and the humidity analysis module, and is used for comprehensively fitting out the optimal fresh air quantity of the indoor space based on the optimal fresh air quantity of the indoor space and the optimal fresh air quantity of the humidity.
The using process of the air conditioner fresh air volume control system based on indoor environment detection is as follows:
step one: environmental monitoring the temperature and humidity of the indoor space and the outdoor space;
step two: the space evaluation module evaluates the temperature maintaining capacity and the humidity maintaining capacity of the indoor space based on the construction materials of the indoor space to obtain a basic heat preservation coefficient and a basic moisture preservation coefficient of the indoor space, and evaluates the heat preservation and moisture preservation performance of the indoor space based on the basic heat preservation coefficient and the basic moisture preservation coefficient of the indoor space;
Step three: the temperature analysis module is used for analyzing the temperature change of the indoor space based on the indoor space heat preservation performance of the indoor space, calculating the temperature optimal fresh air quantity of the indoor space through the temperature change of the indoor space based on the set temperature, and simultaneously analyzing the humidity change of the indoor space based on the indoor space heat preservation performance of the indoor space, and calculating the humidity optimal fresh air quantity of the indoor space through the humidity change of the indoor space based on the set humidity;
step four: the fresh air quantity calculation module comprehensively fits the optimal fresh air quantity of the indoor space based on the optimal fresh air quantity of the indoor space and the optimal fresh air quantity of the humidity.
In summary, the invention has the advantages that: the indoor environment change is evaluated by combining multiple factors, so that the fresh air quantity of the fresh air conditioner can be analyzed and predicted in advance, the indoor environment can be accurately regulated and controlled, the comfort level of the indoor environment is ensured, and the service performance of the fresh air conditioner is greatly improved.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention, which is defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The method for controlling the fresh air quantity of the air conditioner based on indoor environment detection is characterized by comprising the following steps of:
based on construction materials of the indoor space, evaluating the temperature maintaining capacity and the humidity maintaining capacity of the indoor space to obtain a basic heat preservation coefficient and a basic moisture preservation coefficient of the indoor space;
based on the basic heat preservation coefficient and the basic moisture preservation coefficient of the indoor space, evaluating the heat preservation and moisture preservation performance of the indoor space;
based on the heat preservation and moisture preservation performance of the indoor space, analyzing the temperature and humidity change of the indoor space;
calculating the temperature-optimum fresh air quantity and the humidity-optimum fresh air quantity of the indoor space through the temperature-humidity change of the indoor space based on the set temperature and humidity;
based on the most proper fresh air quantity of the indoor space temperature and the most proper fresh air quantity of the indoor space humidity, comprehensively fitting the most proper fresh air quantity of the indoor space;
the method for estimating the temperature maintaining capacity and the humidity maintaining capacity of the indoor space based on the construction material of the indoor space comprises the following steps of:
Collecting construction material parameters of an indoor space, and determining the thermal conductivity and the water vapor permeation resistance of the indoor space construction material according to the construction material parameters of the indoor space;
Calculating a basic heat insulation coefficient of the indoor space through a heat insulation evaluation formula based on the heat conductivity coefficient of the indoor space construction material;
Calculating a basic moisture retention coefficient of temperature and humidity through a moisture retention evaluation formula based on the water vapor permeation resistance of the indoor space construction material;
Wherein, the heat preservation evaluation formula and the moisture preservation evaluation formula specifically are: ，
Wherein R is the basic heat preservation coefficient of the indoor space, H is the basic moisture preservation coefficient of the temperature and humidity, Build material thickness for j-th layer of indoor space,/>Thermal conductivity of material for j-th layer of indoor space,/>The water vapor permeation resistance of the j-th indoor space construction material is provided, and m is the number of construction material layers of the indoor space wall;
The heat preservation and moisture preservation performance of the indoor space is evaluated based on the basic heat preservation coefficient and the basic moisture preservation coefficient of the indoor space, and the heat preservation and moisture preservation performance of the indoor space is evaluated specifically comprises:
Determining the surface area of each wall surface of the indoor space based on the construction size of the indoor space;
determining the heat loss ratio of the indoor space by utilizing an indoor space temperature performance evaluation formula based on the surface area of the indoor space, the basic heat preservation coefficient of the indoor space and the indoor temperature and outdoor temperature of the indoor space;
Determining the humidity exchange ratio of the indoor space by utilizing an indoor space humidity performance evaluation formula based on the surface area of the indoor space, the basic moisture retention coefficient of the indoor space and the indoor and outdoor vapor pressure difference of the indoor space;
The indoor space temperature performance evaluation formula specifically comprises: ；
The indoor space humidity performance evaluation formula specifically comprises: ；
In the method, in the process of the invention, For the heat loss ratio,/>For humidity exchange ratio,/>Is the indoor temperature of the indoor space,/>Is the water vapor pressure of the indoor space,/>To construct the surface area of the ith wall surface of the indoor space,/>To construct the basic heat preservation coefficient of the ith wall surface of the indoor space,/>To construct the basic moisture retention coefficient of the ith wall surface of the indoor space,/>To construct the outside temperature of the ith wall surface of the indoor space,/>To construct the outside vapor pressure of the i-th wall surface of the indoor space.
2. The method for controlling fresh air quantity of an air conditioner based on indoor environment detection according to claim 1, wherein analyzing the temperature and humidity change of the indoor space based on the heat preservation and humidity preservation performance of the indoor space specifically comprises:
collecting the temperature and humidity of the outer side of each wall surface of the indoor space in real time;
Based on the acquired temperature and humidity of the outer side of the wall surface, predicting the temperature and humidity of the outer side of the wall surface in a linear or nonlinear regression mode;
Substituting the predicted wall surface outside temperature and humidity into an indoor space temperature performance evaluation formula and an indoor space humidity performance evaluation formula to respectively obtain a predicted heat loss ratio and a predicted humidity exchange ratio;
Based on the predicted heat loss ratio and humidity exchange ratio, an indoor space temperature prediction model and an indoor space humidity prediction model are constructed;
The indoor space temperature prediction model is as follows: ，
The indoor space humidity prediction model is as follows: ，
In the method, in the process of the invention, For the predicted indoor space temperature at time t,/>For the predicted indoor space humidity at time t,/>For the predicted heat loss ratio at time t,/>For the predicted humidity exchange ratio at time t,/>For the indoor space temperature at the current moment,/>For the indoor space humidity at the current moment,/>Is the heat exchange coefficient of fresh air,/>Is the fresh air humidity exchange coefficient,/>Is fresh air flow rate/>Is the time of day.
3. The method for controlling fresh air quantity of an air conditioner based on indoor environment detection according to claim 2, wherein the method for predicting the temperature and humidity of the outer side of the wall surface by adopting a linear or nonlinear regression mode based on the acquired temperature and humidity of the outer side of the wall surface specifically comprises the following steps:
marking a temperature-time scatter diagram and a humidity-time scatter diagram in a plane rectangular coordinate system based on the acquired temperature and humidity of the outer side of the wall surface;
Based on the temperature-time scatter diagram and the humidity-time scatter diagram, adopting linear regression fit or nonlinear regression fit to obtain a temperature-time fit equation And humidity-time fitting equation/>。
4. The method for controlling fresh air volume of an air conditioner based on indoor environment detection according to claim 3, wherein calculating the temperature-optimized fresh air volume and the humidity-optimized fresh air volume of the indoor space based on the set temperature and humidity through the temperature-humidity change of the indoor space specifically comprises:
based on the indoor space temperature prediction model and the set temperature, an indoor temperature equation is constructed, and the indoor temperature equation is solved to obtain the most proper fresh air quantity of temperature;
based on the indoor space humidity prediction model and the set humidity, an indoor humidity equation is constructed, and the indoor humidity equation is solved to obtain the optimal fresh air quantity of humidity;
Wherein, the indoor temperature equation is: ，
the indoor humidity equation is: ，
Wherein, For a set temperature,/>Is set to a set humidity.
5. The method for controlling fresh air volume of an air conditioner based on indoor environment detection according to claim 4, wherein the comprehensively fitting the optimal fresh air volume of the indoor space based on the optimal fresh air volume of the indoor space and the optimal fresh air volume of the humidity specifically comprises:
constructing a fresh air output evaluation formula based on the temperature-optimum fresh air quantity and the humidity-optimum fresh air quantity;
Solving the fresh air flow rate when the fresh air output evaluation formula outputs the minimum, namely the optimal fresh air quantity of the indoor space;
Wherein, the fresh air output evaluation formula is: ，
In the method, in the process of the invention, For/>Output value of corresponding fresh air output evaluation formula,/>For the fresh air flow at time t,/>Is the most proper fresh air quantity of the temperature at the time t/>For the most proper humidity fresh air quantity at time t,/>Is a humidity weight value.
6. The indoor environment detection-based air conditioning fresh air volume control method according to any one of claims 1 to 5, further comprising an indoor environment detection-based air conditioning fresh air volume control system, wherein the indoor environment detection-based air conditioning fresh air volume control system comprises:
An environment monitoring module for monitoring the temperature and humidity of the indoor space and the outdoor space;
The space evaluation module is used for evaluating the temperature maintaining capacity and the humidity maintaining capacity of the indoor space based on the building materials of the indoor space to obtain a basic heat preservation coefficient and a basic moisture preservation coefficient of the indoor space, and evaluating the heat preservation and moisture preservation performance of the indoor space based on the basic heat preservation coefficient and the basic moisture preservation coefficient of the indoor space;
the temperature analysis module is electrically connected with the space evaluation module and the environment monitoring module and is used for analyzing the temperature change of the indoor space based on the indoor space heat preservation performance of the indoor space and calculating the temperature optimum fresh air quantity of the indoor space through the temperature change of the indoor space based on the set temperature;
The humidity analysis module is electrically connected with the space evaluation module and the environment monitoring module, and is used for analyzing the humidity change of the indoor space based on the indoor space heat preservation performance of the indoor space and calculating the humidity optimal fresh air quantity of the indoor space through the humidity change of the indoor space based on the set humidity;
The fresh air quantity calculation module is electrically connected with the temperature analysis module and the humidity analysis module, and is used for comprehensively fitting out the optimal fresh air quantity of the indoor space based on the optimal fresh air quantity of the indoor space and the optimal fresh air quantity of the humidity.
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| CN114135950A (en) * | 2021-10-19 | 2022-03-04 | 浙江曼瑞德舒适系统有限公司 | Climate comfortable home system |
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