A thermal comfort environment cabin and its multi-field coupling control system

Abstract

The present invention relates to the technical field of multi-field coupling control of the environment, and specifically to a thermal comfort environment cabin and a multi-field coupling control system thereof, which comprises: the environment cabin simulates the environment cabin by comprehensive regulation of the temperature field, humidity field, airflow field and air quality field; the multi-field coupling control unit integrates the temperature field, humidity field, airflow field and air quality field based on a multi-dimensional thermal comfort comprehensive regulation algorithm to comprehensively and dynamically regulate the environment in the environment cabin; the temperature and humidity control unit calculates the PMV value of the temperature field and the PMV value of the humidity field based on the temperature gradient control equation and the humidity control equation to regulate the temperature and humidity; the airflow regulation unit calculates the PMV value of the airflow field based on the airflow control equation to regulate the airflow velocity; the air quality control unit calculates the PMV value of the air quality field based on the carbon dioxide change equation to regulate the carbon dioxide concentration. A thermal comfort environment cabin and a multi-field coupling control system thereof realize the coupling of various physical fields and environmental regulation through a multi-dimensional thermal comfort comprehensive regulation algorithm.

Description

Technical Field

[0001] The present invention relates to the technical field of environmental multi-field coupling control, and specifically, to a thermal comfort environment chamber and its multi-field coupling control system. Background Art

[0002] The thermal comfort environment chamber and its multi-field coupling control system aim to optimize human thermal comfort and improve energy use efficiency. Through a multi-dimensional thermal comfort comprehensive regulation algorithm, it controls the dynamic balance of the temperature field, humidity field, air flow field, and air quality field, and realizes providing personalized thermal comfort experiences and precise environmental control under different environmental conditions.

[0003] Existing thermal comfort environment chambers and their multi-field coupling control systems usually have difficulty in simultaneously and efficiently handling the real-time coupling regulation of multi-field variables. Moreover, since the environment of the environment chamber is affected by multiple factors such as temperature, humidity, air flow, and air quality, it will cause mutual coupling and interference between physical fields, making it difficult to achieve rapid response and precise control, and resulting in problems such as overheating, overcooling, or uneven humidity in local areas. Therefore, a thermal comfort environment chamber and its multi-field coupling control system are designed. Summary of the Invention

[0004] The purpose of the present invention is to provide a thermal comfort environment chamber and its multi-field coupling control system to solve the problems mentioned in the above background art, that is, due to the environment of the environment chamber being affected by multiple factors such as temperature, humidity, air flow, and air quality, it will cause mutual coupling and interference between physical fields, making it difficult to achieve rapid response and precise control, and resulting in problems such as overheating, overcooling, or uneven humidity in local areas.

[0005] To achieve the above purpose, the present invention aims to provide a multi-field coupling control system, including:

[0006] A multi-field coupling control unit, which, based on a multi-dimensional thermal comfort comprehensive regulation algorithm, integrates the temperature field, humidity field, air flow field, and air quality field to comprehensively and dynamically regulate the environment inside the environment chamber;

[0007] A temperature and humidity control unit, which calculates the PMV value of the temperature field and the PMV value of the humidity field based on the temperature gradient control equation and the humidity control equation in the multi-dimensional thermal comfort comprehensive regulation algorithm, and regulates the temperature and humidity of the environment chamber;

[0008] An air flow regulation unit, which calculates the PMV value of the air flow field based on the air flow control equation in the multi-dimensional thermal comfort comprehensive regulation algorithm, and regulates the air flow velocity in the environment chamber;

[0009] An air quality control unit, which calculates the PMV value of the air quality field based on the carbon dioxide change equation in the multi-dimensional thermal comfort comprehensive regulation algorithm, and regulates the carbon dioxide concentration in the environment chamber.

[0010] As a further improvement of this technical solution, the multi-dimensional thermal comfort comprehensive regulation algorithm is implemented based on the PMV formula of the Fanger model, introducing the control parameters and regulation coefficients of the temperature field, humidity field, air flow field and air quality field, and calculating the PMV value to comprehensively regulate the environment in the environmental chamber respectively.

[0011] As a further improvement of this technical solution, the multi-field coupling control unit, based on the multi-dimensional thermal comfort comprehensive regulation algorithm, comprehensively and dynamically regulates the environment in the environmental chamber by integrating the temperature field, humidity field, air flow field and air quality field. The specific steps are as follows:

[0012] S2.1. Construct the PMV formula of the basic Fanger model;

[0013] S2.2. Use the temperature gradient control equation to calculate the temperature change rate of the environmental chamber, introduce the PMV formula of the Fanger model to calculate the PMV value of the temperature field, and the temperature and humidity control unit adjusts the temperature of the environmental chamber according to the PMV value of the temperature field;

[0014] S2.3. Use the humidity control equation to calculate the humidity change rate of the environmental chamber, introduce the PMV formula of the Fanger model to calculate the PMV value of the humidity field, and the temperature and humidity control unit adjusts the humidity of the environmental chamber according to the PMV value of the humidity field;

[0015] S2.4. Use the air flow control equation to calculate the air flow change rate of the environmental chamber, introduce the PMV formula of the Fanger model to calculate the PMV value of the air flow field, and the air flow regulation unit adjusts the air flow velocity of the environmental chamber according to the PMV value of the air flow field;

[0016] S2.5. Use the carbon dioxide change equation to calculate the carbon dioxide change rate, introduce the PMV formula of the Fanger model to calculate the PMV value of the air quality field, and the air quality control unit adjusts the carbon dioxide concentration of the environmental chamber according to the PMV value of the air quality field.

[0017] As a further improvement of this technical solution, in S2.1, the PMV formula of the basic Fanger model is constructed as follows:

[0018] ;

[0019] Wherein, is the basal metabolic rate; is the external mechanical power, which takes the value of 0 in this system; is the clothing surface temperature; is the mean radiant temperature; is the air temperature; is the air water vapor pressure; is the clothing coefficient; is the convective heat transfer coefficient.

[0020] As a further improvement of this technical solution, the temperature and humidity control unit uses the temperature gradient control equation and the humidity control equation in the multi-dimensional thermal comfort comprehensive regulation algorithm to calculate the PMV values of the temperature field and the humidity field, and regulate the temperature and humidity of the environmental chamber. The specific steps are as follows:

[0021] S3.1. Calculate the temperature change rate of the environmental chamber using the temperature gradient control equation , and calculate the effective temperature of the entire environmental chamber in combination with the air temperature , and introduce the effective temperature into the PMV formula of the Fanger model to calculate the PMV value of the temperature field ;

[0022] S3.2. Calculate the humidity change rate of the environmental chamber using the humidity control equation, and calculate the relative humidity and the corrected water vapor pressure in combination with the effective temperature , and introduce them into the PMV formula of the Fanger model to calculate the PMV value of the humidity field ;

[0023] S3.3. Adjust the temperature and humidity of the environmental chamber according to the PMV values of the temperature field, the PMV values of the humidity field, and the temperature and humidity equipment.

[0024] As a further improvement of this technical solution, in S3.1, the temperature change rate of the environmental chamber is calculated using the temperature gradient control equation , and the effective temperature of the entire environmental chamber is calculated in combination with the air temperature , and the effective temperature is introduced into the PMV formula of the Fanger model to calculate the PMV value of the temperature field , and the specific method is as follows:

[0025] Construct a temperature gradient control equation to calculate the temperature change rate :

[0026] ;

[0027] Among them, is the temperature of the th temperature sensor in the environmental chamber; is the target temperature; is the temperature adjustment coefficient; is the Laplace operator of the temperature field; is the spatial temperature diffusion coefficient;

[0028] Calculate the effective temperature :

[0029] ;

[0030] Among them, is the weight coefficient of the temperature change rate;

[0031] Calculate the PMV value of the temperature field :

[0032] ;

[0033] Among them, is the effective temperature.

[0034] As a further improvement of this technical solution, in the S3.2, the humidity control equation is used to calculate the humidity change rate of the environmental chamber, and combined with the effective temperature Calculate the corrected relative humidity and the corrected water vapor pressure , and the PMV formula of the Fanger model is introduced to calculate the PMV value of the humidity field , and the specific method is as follows:

[0035] Construct a humidity control equation to calculate the humidity change rate of the environmental chamber :

[0036] ;

[0037] Among them, is the humidity adjustment coefficient; is the target relative humidity; is the current relative humidity; is the coupling coefficient of temperature to humidity change; is the dew point temperature;

[0038] Calculate the corrected relative humidity and the corrected water vapor pressure :

[0039] ;

[0040] ;

[0041] Among them, is the weight coefficient of the humidity change rate; is the effective temperature The saturated water vapor pressure at;

[0042] Calculate the PMV value of the humidity field :

[0043] ;

[0044] Among them, is the effective temperature; is the corrected water vapor pressure.

[0045] As a further improvement of this technical solution, the air flow regulation unit calculates the PMV value of the air flow field based on the air flow control equation in the multi-dimensional thermal comfort comprehensive regulation algorithm, and adjusts the air flow velocity in the environmental chamber. The specific method is as follows:

[0046] S4.1. Calculate the air flow change rate in the environmental chamber using the air flow control equation , calculate the effective air flow velocity , and based on the effective air flow velocity calculate the corrected heat transfer coefficient , and introduce the PMV formula of the Fanger model to calculate the PMV value of the air flow field . The specific method is as follows:

[0047] Construct the air flow control equation to calculate the air flow change rate in the environmental chamber :

[0048] ;

[0049] where is the current air flow velocity; is the target air flow velocity; is the air flow regulation coefficient; is the local pressure gradient; is the pressure gradient influence coefficient;

[0050] The effective air flow velocity :

[0051] ;

[0052] where is the weight coefficient of the air flow change rate;

[0053] The corrected heat transfer coefficient :

[0054] ;

[0055] where is the corrected heat transfer coefficient; is the empirical coefficient;

[0056] Calculate the PMV value of the air flow field:

[0057] ;

[0058] where is the effective temperature; is the corrected water vapor pressure; is the corrected heat transfer coefficient;

[0059] S4.2. Adjust the air flow velocity in the environmental chamber according to the PMV value of the air flow field and the air flow regulating device.

[0060] As a further improvement of this technical solution, the air quality control unit calculates the PMV value of the air quality field based on the carbon dioxide change equation in the multi-dimensional thermal comfort comprehensive regulation algorithm, and adjusts the carbon dioxide concentration in the environmental chamber. The specific method is as follows:

[0061] S5.1. Calculate the carbon dioxide change rate using the carbon dioxide change equation , calculate the corrected metabolic rate and introduce the PMV formula of the Fanger model to calculate the PMV value of the air quality field , the specific method is as follows:

[0062] Construct a carbon dioxide change equation to calculate the carbon dioxide change rate :

[0063] ;

[0064] Where, is the current carbon dioxide concentration; is the set carbon dioxide target concentration; is the ventilation rate; is the control carbon dioxide change adjustment coefficient; is the coupling effect adjustment coefficient for controlling ventilation;

[0065] Calculate the corrected metabolic rate :

[0066] ;

[0067] Where, is the carbon dioxide change influence coefficient;

[0068] Calculate the PMV value of the air quality field:

[0069] ;

[0070] Where, is the effective temperature; is the corrected water vapor pressure; is the corrected heat transfer coefficient; is the corrected metabolic rate;

[0071] S5.2. Adjust the carbon dioxide concentration in the environmental chamber according to the PMV value of the air quality field and the air quality control device.

[0072] A thermal comfort environment chamber is controlled based on the multi-field coupling control system described above, including an environment chamber. The environment chamber is comprehensively regulated through a temperature field, a humidity field, an air flow field, and an air quality field to simulate and provide a thermal comfort space environment. The environment chamber includes a chamber structure module, temperature and humidity equipment, air flow regulating equipment, air quality control equipment, and a terminal touch screen;

[0073] Among them, the chamber structure module uses heat-insulating materials to construct a fully enclosed environment chamber;

[0074] The temperature and humidity equipment includes a heater, a refrigeration system, a humidifier, a dehumidifier, a temperature sensor, and a humidity sensor, and is used to comprehensively regulate the temperature and humidity in the thermal comfort environment chamber;

[0075] The air flow regulating equipment includes an intelligent fan, a ventilation duct, and an air flow sensor, and is used to control the flow speed and direction of the air flow in the environment chamber;

[0076] The air quality control equipment monitors and adjusts the air quality in the environment chamber in real time through an air purifier and a carbon dioxide sensor;

[0077] The terminal touch screen is used for users to view the environmental status in the environment chamber in real time and manually adjust the temperature, humidity, air flow, and air quality parameters.

[0078] Compared with the prior art, the beneficial effects of the present invention are:

[0079] 1. In the thermal comfort environment chamber and its multi-field coupling control system, based on the multi-dimensional thermal comfort comprehensive regulation algorithm, by integrating the temperature field, humidity field, air flow field, and air quality field, the PMV value of each physical field can be dynamically calculated to ensure that the temperature, humidity, air flow, and air quality in the environment chamber always remain within the comfortable range.

[0080] 2. In the thermal comfort environment chamber and its multi-field coupling control system, through the real-time feedback regulation mechanism and the multi-field coupling control equation, precise regulation of the multi-field coupling environment in the environment chamber is achieved, ensuring that under different environmental change conditions, the system can quickly respond and adjust the balance of each physical field, improving comfort while optimizing energy consumption. Description of the Drawings

[0081] Figure 1 It is the overall flow block diagram of the present invention;

[0082] The meanings of each label in the figure are as follows:

[0083] 1. Environment chamber; 2. Multi-field coupling control unit; 3. Temperature and humidity control unit; 4. Air flow regulation unit; 5. Air quality control unit. Specific Embodiments

[0084] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention. Embodiment

[0085] Please refer to Figure 1 As shown in the figure, a multi-field coupling control system is provided, including:

[0086] A multi-field coupling control unit 2, which is based on a multi-dimensional thermal comfort comprehensive regulation algorithm, and comprehensively and dynamically regulates the environment in the environmental chamber by integrating the temperature field, humidity field, air flow field, and air quality field;

[0087] In this embodiment, the multi-dimensional thermal comfort comprehensive regulation algorithm is implemented based on the PMV formula of the Fanger model. By introducing the control parameters and regulation coefficients of the temperature field, humidity field, air flow field, and air quality field, the PMV value is calculated respectively to comprehensively regulate the environment in the environmental chamber.

[0088] In this embodiment, the multi-field coupling control unit 2 comprehensively and dynamically regulates the environment in the environmental chamber based on the multi-dimensional thermal comfort comprehensive regulation algorithm by integrating the temperature field, humidity field, air flow field, and air quality field. The specific steps are as follows:

[0089] S2.1. Construct the PMV formula of the basic Fanger model;

[0090] S2.2. Use the temperature gradient control equation to calculate the temperature change rate of the environmental chamber, introduce the PMV formula of the Fanger model to calculate the PMV value of the temperature field, and the temperature and humidity control unit 3 adjusts the temperature of the environmental chamber according to the PMV value of the temperature field;

[0091] S2.3. Use the humidity control equation to calculate the humidity change rate of the environmental chamber, introduce the PMV formula of the Fanger model to calculate the PMV value of the humidity field, and the temperature and humidity control unit 3 adjusts the humidity of the environmental chamber according to the PMV value of the humidity field;

[0092] S2.4. Use the air flow control equation to calculate the air flow change rate of the environmental chamber, introduce the PMV formula of the Fanger model to calculate the PMV value of the air flow field, and the air flow regulation unit 4 adjusts the air flow velocity of the environmental chamber according to the PMV value of the air flow field;

[0093] S2.5. Use the carbon dioxide change equation to calculate the carbon dioxide change rate, introduce the PMV formula of the Fanger model to calculate the PMV value of the air quality field, and the air quality control unit 5 adjusts the carbon dioxide concentration of the environmental chamber according to the PMV value of the air quality field.

[0094] In this embodiment S2.1, the PMV formula of the basic Fanger model is constructed as follows:

[0095] ;

[0096] where, is the basal metabolic rate; is the external mechanical power, which takes the value of 0 in this system; is the clothing surface temperature; is the mean radiant temperature; is the air temperature; is the air water vapor pressure; is the clothing coefficient; is the convective heat transfer coefficient.

[0097] In this embodiment, the PMV formula of the Fanger model is used to evaluate the thermal comfort of the human body under specific environmental conditions. It is a model established based on the heat exchange process between the human body and the surrounding environment, which can predict the subjective thermal comfort perception of people in different environments and quantify the response of the human body to environmental factors such as temperature, humidity, and air flow;

[0098] The PMV formula synthesizes multiple parameters such as temperature, humidity, air flow, radiant temperature, basal metabolic rate, and clothing thermal resistance, and can comprehensively reflect the thermal comfort of the environment. It is suitable for complex multi-field coupling control systems;

[0099] The PMV formula provides a quantitative index, which can objectively measure the thermal comfort of the environment and facilitate the system to adjust the control strategies of each physical field through feedback.

[0100] The temperature and humidity control unit 3 calculates the PMV values of the temperature field and the humidity field based on the temperature gradient control equation and the humidity control equation in the multi-dimensional thermal comfort comprehensive regulation algorithm, and regulates the temperature and humidity of the environmental chamber;

[0101] In this embodiment, the temperature and humidity control unit 3 calculates the PMV values of the temperature field and the humidity field using the temperature gradient control equation and the humidity control equation in the multi-dimensional thermal comfort comprehensive regulation algorithm, and regulates the temperature and humidity of the environmental chamber. The specific steps are as follows:

[0102] S3.1. Calculate the temperature change rate of the environmental chamber using the temperature gradient control equation , and calculate the effective temperature of the entire environmental chamber in combination with the air temperature , and introduce the effective temperature into the PMV formula of the Fanger model to calculate the PMV value of the temperature field ;

[0103] S3.2. Calculate the humidity change rate of the environmental chamber using the humidity control equation, and combine the effective temperature to calculate the relative humidity and correct the water vapor pressure , and introduce the PMV formula of the Fanger model to calculate the PMV value of the humidity field ;

[0104] S3.3. Adjust the temperature and humidity of the environmental chamber according to the PMV value of the temperature field, the PMV value of the humidity field, and the temperature and humidity equipment.

[0105] In this embodiment, adjust the temperature and humidity of the environmental chamber according to the PMV value of the temperature field, the PMV value of the humidity field, and the temperature and humidity equipment, specifically as follows:

[0106] If the calculated PMV value of the temperature field and the PMV value of the humidity field exceed the comfort interval to , then trigger the temperature adjustment operation:

[0107] , environmental overheating: Start the refrigeration system to lower the temperature inside the chamber until it returns to the comfort interval.

[0108] , environmental overcooling: Start the heater to raise the temperature inside the chamber until it returns to the comfort interval;

[0109] , low humidity, dry air: Start the humidifier to increase the humidity in the air until it returns to the comfort range.

[0110] , high humidity, humid air: Start the dehumidifier to lower the humidity in the air until it enters the comfort interval;

[0111] In this embodiment, S3.1. Calculate the temperature change rate of the environmental chamber using the temperature gradient control equation , and combine the air temperature to calculate the effective temperature of the entire environmental chamber , and introduce the effective temperature into the PMV formula of the Fanger model to calculate the PMV value of the temperature field , the specific method is as follows:

[0112] Construct a temperature gradient control equation to calculate the temperature change rate :

[0113] ;

[0114] Among them, is the temperature of the th temperature sensor in the environmental chamber; is the target temperature; is the temperature regulation coefficient; is the Laplace operator of the temperature field; is the spatial temperature diffusion coefficient;

[0115] Calculate the effective temperature :

[0116] ;

[0117] where is the weight coefficient of the temperature change rate;

[0118] Calculate the PMV value of the temperature field :

[0119] ;

[0120] where is the effective temperature.

[0121] In this embodiment, the temperature regulation coefficient is used to control the adjustment speed between the temperature and the target temperature , and its value is set manually; The spatial temperature diffusion coefficient

[0122] controls the diffusion rate of the temperature in the chamber, and its value is further set through experiments; The air temperature

[0123] is obtained by averaging the temperatures of all temperature sensors in the environmental chamber ; The weight coefficient of the temperature change rate

[0124] controls the influence degree of the temperature change rate on the effective temperature , and its specific value is determined through experiments . In this embodiment S3.2, the humidity control equation is used to calculate the humidity change rate of the environmental chamber, and combined with the effective temperature

[0125] calculate the corrected relative humidity and the corrected water vapor pressure , and introduce the PMV formula of the Fanger model to calculate the PMV value of the humidity field , and the specific method is as follows: Construct a humidity control equation to calculate the humidity change rate of the environmental chamber

[0126] : :

[0127] ;

[0128] wherein, is the humidity adjustment coefficient; is the target relative humidity; is the current relative humidity; is the coupling coefficient of temperature to humidity change; is the dew point temperature;

[0129] Calculate the corrected relative humidity and the corrected water vapor pressure :

[0130] ;

[0131] ;

[0132] wherein, is the weight coefficient of the humidity change rate; is the effective temperature at the saturation water vapor pressure;

[0133] Calculate the PMV value of the humidity field :

[0134] ;

[0135] wherein, is the effective temperature; is the corrected water vapor pressure.

[0136] In this embodiment, as the humidity adjustment coefficient represents the influence of the deviation between the humidity and the set value on the humidity change rate, and the specific value is determined by experiments;

[0137] is the current relative humidity, which is obtained by averaging the humidity of all humidity sensors in the environmental chamber;

[0138] as the coupling coefficient of temperature to humidity change represents the influence of the difference between the air temperature and the dew point temperature on the humidity change, and the specific value depends on the specific design and heat and mass transfer characteristics of the environmental chamber;

[0139] is the dew point temperature, which is the temperature at which water vapor in the air begins to condense into water and represents the maximum humidity capacity in the air;

[0140] is the weight coefficient of humidity change rate, The specific value is determined based on experimental results;

[0141] is the effective temperature The saturated water vapor pressure under is obtained by looking up the table.

[0142] Airflow regulating unit 4, which calculates the PMV value of the airflow field based on the airflow control equation in the multi-dimensional thermal comfort comprehensive control algorithm and adjusts the airflow velocity in the environmental cabin;

[0143] In this embodiment, the airflow adjustment unit 4 calculates the PMV value of the airflow field based on the airflow control equation in the multi-dimensional thermal comfort comprehensive control algorithm and adjusts the airflow velocity in the environmental cabin. The specific method is as follows:

[0144] S4.1. Calculate the airflow change rate in the environmental chamber using the airflow control equation , calculate the effective air flow velocity , and based on the effective air flow velocity Calculate the corrected heat transfer coefficient , and introduce the PMV formula of Fanger model to calculate the PMV value of airflow field , the specific method is as follows:

[0145] Construct airflow control equation to calculate the airflow change rate in the environmental chamber :

[0146] ;

[0147] Among them, is the current air flow speed; is the target airflow velocity; is the airflow adjustment coefficient; is the local pressure gradient; is the pressure gradient influence coefficient;

[0148] Effective air flow velocity :

[0149] ;

[0150] Among them, is the weight coefficient of airflow change rate;

[0151] Corrected heat transfer coefficient :

[0152] ;

[0153] Among them, is the corrected heat transfer coefficient; is the empirical coefficient; ​

[0154] Calculate the PMV value of the air flow field:

[0155] ;

[0156] wherein, is the effective temperature; is the corrected water vapor pressure; is the corrected heat transfer coefficient;

[0157] In this embodiment, is the current air flow velocity, which is obtained by averaging the air flow velocities of all air flow sensors in the environmental chamber;

[0158] is the air flow regulation coefficient, which represents the sensitivity of the regulation rate when the air flow velocity deviates from the set value, and the specific value is obtained through experiments;

[0159] is the local pressure gradient, which represents the pressure difference at different positions in the chamber and is used to regulate the change of air flow velocity;

[0160] is the pressure gradient influence coefficient; it represents the regulation sensitivity of the local pressure to the change of air flow velocity, The specific value is determined through experiments;

[0161] is the weight coefficient of the air flow change rate, which represents the influence degree of the air flow change rate on the effective air flow velocity;

[0162] In the formula, is the empirical coefficient, which reflects the influence of air flow velocity on convective heat transfer. This coefficient has been verified in many studies on building and human thermal comfort.

[0163] S4.2. Adjust the air flow velocity in the environmental chamber according to the PMV value of the air flow field and the air flow regulation equipment.

[0164] In this embodiment, adjust the air flow velocity in the environmental chamber according to the PMV value of the air flow field and the air flow regulation equipment, specifically as follows:

[0165] The comfortable range of the PMV value of the air flow field is to :

[0166] , when the air flow velocity is too low: start the intelligent fan and increase the rotation speed to increase the air flow velocity until the air flow velocity returns to the comfortable range;

[0167] , when the air flow velocity is too high: reduce the fan rotation speed or temporarily turn off the fan to reduce the air flow velocity until PMV_v returns to the comfortable range.

[0168] An air quality control unit 5, which calculates the PMV value of the air quality field based on the carbon dioxide change equation in the multi-dimensional thermal comfort comprehensive regulation algorithm and adjusts the carbon dioxide concentration in the environmental chamber;

[0169] In this embodiment, the air quality control unit 5 calculates the PMV value of the air quality field based on the carbon dioxide change equation in the multi-dimensional thermal comfort comprehensive regulation algorithm and adjusts the carbon dioxide concentration in the environmental chamber. The specific method is as follows:

[0170] S5.1. Calculate the carbon dioxide change rate using the carbon dioxide change equation , calculate the modified metabolic rate and introduce the PMV formula of the Fanger model to calculate the PMV value of the air quality field , the specific method is as follows:

[0171] Construct a carbon dioxide change equation to calculate the carbon dioxide change rate :

[0172] ;

[0173] Among them, is the current carbon dioxide concentration; is the set carbon dioxide target concentration; is the ventilation rate; is the control carbon dioxide change adjustment coefficient; is the coupling effect adjustment coefficient for controlling ventilation;

[0174] Calculate the modified metabolic rate :

[0175] ;

[0176] Among them, is the carbon dioxide change influence coefficient;

[0177] Calculate the PMV value of the air quality field:

[0178] ;

[0179] Among them, is the effective temperature; is the modified vapor pressure; is the modified heat transfer coefficient; is the modified metabolic rate;

[0180] In this embodiment, is the current carbon dioxide concentration, which is obtained by averaging the carbon dioxide concentration data of all carbon dioxide sensors in the environmental chamber;

[0181] The specific value of the carbon dioxide change adjustment coefficient is controlled manually;

[0182] The specific value of the coupling effect adjustment coefficient for controlling ventilation is controlled manually;

[0183] S5.2. Adjust the carbon dioxide concentration in the environmental chamber according to the PMV value of the air quality field and the air quality control equipment;

[0184] In this embodiment, the carbon dioxide concentration in the environmental chamber is adjusted according to the PMV value of the air quality field and the air quality control equipment. The specific method is as follows:

[0185] The comfortable range of the PMV value of the air quality field is to :

[0186] , high carbon dioxide concentration: When the carbon dioxide concentration exceeds the comfortable threshold, causing the value to increase, the system will start or increase the operating intensity of the air purifier, accelerate air circulation, and reduce the carbon dioxide concentration in the chamber until returns to the comfortable range;

[0187] , low carbon dioxide concentration: When the air quality is good and the carbon dioxide concentration is low, the system can reduce the operating intensity of the air purifier, reduce energy consumption, and maintain the stability of the air quality.

[0188] There is also provided a thermally comfortable environmental chamber, including an environmental chamber 1, which comprehensively regulates and controls through a temperature field, a humidity field, an air flow field, and an air quality field to simulate and provide a thermally comfortable space environment;

[0189] In this embodiment, the environmental chamber 1 includes a chamber structure module, temperature and humidity equipment, air flow regulating equipment, air quality control equipment, and a terminal touch screen;

[0190] Among them, the chamber structure module uses heat-insulating materials to construct a fully enclosed environmental chamber;

[0191] The temperature and humidity equipment includes a heater, a refrigeration system, a humidifier, a dehumidifier, a temperature sensor, and a humidity sensor, and is used to comprehensively regulate the temperature and humidity in the thermally comfortable environmental chamber; it can be dynamically adjusted according to the values of the temperature sensor and the humidity sensor to ensure that the temperature in the chamber is maintained within the comfortable range of the human body, 20 degrees Celsius to 26 degrees Celsius, and the humidity is maintained between 40% and 60%;

[0192] The air flow regulating device includes an intelligent fan, a ventilation duct, and an air flow sensor, and is used to control the flow rate and direction of the air flow in the environmental chamber; the air flow regulating device ensures uniform air distribution, avoids local overcooling or overheating, and can also adjust the air flow personalized according to the user's position and activity, making the air flow softer and enhancing the comfort level;

[0193] The air quality control device monitors and adjusts the air quality in the environmental chamber in real time through an air purifier and a carbon dioxide sensor; the air purifier removes particulate matter, allergens, and harmful gases, and maintains the carbon dioxide concentration in the chamber within the appropriate range of 400 ppm - 1000 ppm;

[0194] The terminal touch screen is used for the user to view the environmental status in the environmental chamber in real time and manually adjust the temperature, humidity, air flow, and air quality parameters.

[0195] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A multi-field coupling control system, characterized in that: include: A multi-field coupling control unit (2), wherein the multi-field coupling control unit (2) is based on a multi-dimensional thermal comfort comprehensive control algorithm, and integrates a temperature field, a humidity field, an airflow field and an air quality field to comprehensively and dynamically control the environment inside the environmental cabin; A temperature and humidity control unit (3), wherein the temperature and humidity control unit (3) calculates a temperature field PMV value and a humidity field PMV value based on a temperature gradient control equation and a humidity control equation in a multi-dimensional thermal comfort comprehensive control algorithm, and controls the temperature and humidity of the environmental chamber; An airflow regulating unit (4), wherein the airflow regulating unit (4) calculates the PMV value of the airflow field based on the airflow control equation in the multi-dimensional thermal comfort comprehensive control algorithm, and regulates the airflow velocity of the environmental cabin; An air quality control unit (5), wherein the air quality control unit (5) calculates the PMV value of the air quality field based on the carbon dioxide change equation in the multi-dimensional thermal comfort comprehensive control algorithm, and adjusts the carbon dioxide concentration in the environmental cabin, and the specific method is as follows: S5.

1. Calculate the rate of change of carbon dioxide using the carbon dioxide change equation , calculate the corrected metabolic rate The PMV formula of Fanger model is introduced to calculate the PMV value of air quality field , the specific method is as follows: Constructing the carbon dioxide change equation to calculate the carbon dioxide change rate : ； in, is the current carbon dioxide concentration; To set a target concentration of carbon dioxide; is the ventilation rate; To control the carbon dioxide variation adjustment coefficient; To control the coupling effect adjustment coefficient of ventilation; Calculate corrected metabolic rate : ； in, is the carbon dioxide change impact coefficient; Calculate the PMV value of the air quality field: ； in, is the effective temperature; To correct for water vapor pressure; is the corrected heat transfer coefficient; To correct metabolic rate; S5.

2. Adjust the carbon dioxide concentration according to the PMV value of the air quality field and the air quality control equipment.

2. The multi-field coupling control system according to claim 1, characterized in that: The multi-dimensional thermal comfort comprehensive control algorithm is implemented based on the PMV formula of the Fanger model, which introduces the control parameters and control coefficients of the temperature field, humidity field, airflow field and air quality field, and calculates the PMV value to comprehensively control the environment in the environmental cabin.

3. The multi-field coupling control system according to claim 2, characterized in that: The multi-field coupling control unit (2) is based on a multi-dimensional thermal comfort comprehensive control algorithm, and integrates the temperature field, humidity field, airflow field and air quality field to comprehensively and dynamically control the environment in the environmental cabin. The specific steps are as follows: S2.1, construct the PMV formula of the basic Fanger model; S2.2, using the temperature gradient control equation to calculate the temperature change rate of the environmental chamber, and introducing the PMV formula of the Fanger model to calculate the PMV value of the temperature field, and the temperature and humidity control unit (3) adjusts the temperature of the environmental chamber according to the PMV value of the temperature field; S2.3, using the humidity control equation to calculate the humidity change rate of the environmental chamber, and introducing the PMV formula of the Fanger model to calculate the PMV value of the humidity field, and the temperature and humidity control unit (3) adjusts the humidity of the environmental chamber according to the PMV value of the humidity field; S2.4, using the airflow control equation to calculate the airflow change rate of the environmental chamber, and introducing the PMV formula of the Fanger model to calculate the PMV value of the airflow field, and the airflow adjustment unit (4) adjusts the airflow velocity of the environmental chamber according to the PMV value of the airflow field; S2.

5. The carbon dioxide change rate is calculated using the carbon dioxide change equation, and the PMV formula of the Fanger model is introduced to calculate the PMV value of the air quality field. The air quality control unit (5) adjusts the carbon dioxide concentration in the environmental chamber according to the PMV value of the air quality field.

4. The multi-field coupling control system according to claim 3, characterized in that: In S2.1, the PMV formula of the basic Fanger model is constructed as follows: ； in, is the basal metabolic rate; is the external mechanical power, which is taken as 0 in this system; is the surface temperature of the clothes; is the mean radiant temperature; is the air temperature; is the water vapor pressure of air; is the clothing coefficient; is the convective heat transfer coefficient.

5. The multi-field coupling control system according to claim 4, characterized in that: The temperature and humidity control unit (3) uses the temperature gradient control equation and the humidity control equation in the multi-dimensional thermal comfort comprehensive control algorithm to calculate the temperature field PMV value and the humidity field PMV value, and controls the temperature and humidity of the environmental chamber. The specific steps are as follows: S3.

1. Calculate the temperature change rate of the environmental chamber using the temperature gradient control equation , combined with the air temperature to calculate the effective temperature of the entire environmental chamber , and the effective temperature The PMV formula introduced into the Fanger model is used to calculate the PMV value of the temperature field. ; S3.

2. Use the humidity control equation to calculate the humidity change rate of the environmental chamber, combined with the effective temperature Calculating relative humidity and corrected water vapor pressure , and the PMV formula of Fanger model is introduced to calculate the PMV value of humidity field ; S3.

3. Adjust the temperature and humidity of the environmental chamber according to the PMV value of the temperature field, the PMV value of the humidity field and the temperature and humidity equipment.

6. The multi-field coupling control system according to claim 5, characterized in that: In S3.1, the temperature gradient control equation is used to calculate the temperature change rate of the environmental chamber. , combined with the air temperature to calculate the effective temperature of the entire environmental chamber , and the effective temperature The PMV formula introduced into the Fanger model is used to calculate the PMV value of the temperature field. , the specific method is as follows: Construct temperature gradient control equation to calculate temperature change rate : ； in, For the cabin Temperature sensor temperature; is the target temperature; is the temperature regulation coefficient; is the Laplace operator of the temperature field; is the spatial temperature diffusion coefficient; Calculate effective temperature : ； in, is the weight coefficient of temperature change rate; Calculate the PMV value of the temperature field : ； in, is the effective temperature.

7. The multi-field coupling control system according to claim 6, characterized in that: In S3.2, the humidity control equation is used to calculate the humidity change rate of the environmental chamber, combined with the effective temperature Calculate corrected relative humidity and corrected water vapor pressure , and the PMV formula of Fanger model is introduced to calculate the PMV value of humidity field , the specific method is as follows: Constructing humidity control equation to calculate humidity change rate in environmental chamber : ； in, is the humidity adjustment factor; is the target relative humidity; is the current relative humidity; is the coupling coefficient of temperature to humidity change; is the dew point temperature; Calculate corrected relative humidity and corrected water vapor pressure : ； ； in, is the weight coefficient of humidity change rate; The effective temperature Saturated water vapor pressure under Calculate the PMV value of the humidity field : ； in, is the effective temperature; Corrected for water vapor pressure.

8. The multi-field coupling control system according to claim 7, characterized in that: The airflow adjustment unit (4) calculates the PMV value of the airflow field based on the airflow control equation in the multi-dimensional thermal comfort comprehensive control algorithm, and adjusts the airflow velocity in the environmental chamber. The specific method is as follows: S4.

1. Calculate the airflow change rate in the environmental chamber using the airflow control equation , calculate the effective air velocity , and according to the effective air flow velocity Calculate the corrected heat transfer coefficient , and the PMV formula of Fanger model is introduced to calculate the PMV value of airflow field , the specific method is as follows: Construct airflow control equation to calculate the airflow change rate in the environmental chamber : ； in, is the current air flow speed; is the target airflow velocity; is the airflow adjustment coefficient; is the local pressure gradient; is the pressure gradient influence coefficient; Effective air flow rate : ； in, is the weight coefficient of airflow change rate; Corrected heat transfer coefficient : ； in, is the corrected heat transfer coefficient; is the empirical coefficient; Calculate the PMV value of the airflow field: ； in, is the effective temperature; To correct for water vapor pressure; is the corrected heat transfer coefficient; S4.

2. Adjust the airflow velocity in the environmental chamber according to the PMV value of the airflow field and the airflow regulating equipment.

9. A thermal comfort environment cabin, controlled based on the multi-field coupling control system according to any one of claims 1 to 8, characterized in that: The environmental cabin (1) comprises an environmental cabin (1), wherein the environmental cabin (1) simulates and provides a thermally comfortable space environment through comprehensive regulation of a temperature field, a humidity field, an airflow field and an air quality field, and the environmental cabin (1) comprises a cabin structure module, a temperature and humidity device, an airflow regulation device, an air quality control device and a terminal touch screen; The cabin structure module uses heat-insulating materials to construct a fully enclosed environment cabin; Temperature and humidity equipment includes heaters, refrigeration systems, humidifiers, dehumidifiers, temperature sensors and humidity sensors, which are used to comprehensively control the temperature and humidity in the thermal comfort environment cabin; The airflow regulating device includes an intelligent fan, ventilation ducts and airflow sensors, which are used to control the flow speed and direction of the airflow in the environmental chamber; The air quality control equipment monitors and adjusts the air quality in the environmental chamber in real time through air purifiers and carbon dioxide sensors; The terminal touch screen allows users to view the environmental status in the environmental chamber in real time and manually adjust the temperature, humidity, airflow and air quality parameters.

Images