Energy-saving control method for constant temperature and humidity air conditioning system and air conditioning control device

Abstract

The present application relates to the technical field of air conditioning systems, and discloses an energy-saving control method for a constant temperature and humidity air conditioning system, including: dynamically obtaining first environmental information collected by environmental sensors in the area to be adjusted, wherein the environmental sensors include an inner area sensor and an outer area sensor; determining a multi-variable control strategy required for the area to be adjusted and an actuator corresponding to the multi-variable control strategy based on the first environmental information and environmental conditions corresponding to the area to be adjusted; controlling the actuator to perform an adjustment action according to the multi-variable control strategy, and dynamically monitoring second environmental information fed back by the inner area sensor; and adjusting the adjustment action based on the second environmental information so that the area to be adjusted meets the environmental conditions. This greatly improves the adaptability and flexibility of the air conditioning system and reduces energy consumption.

Description

Technical Field

[0001] This application relates to the technical field of air conditioning systems, and particularly to an energy-saving control method for a constant temperature and humidity air conditioning system and an air conditioning control device. Background Art

[0002] The development of air conditioning systems has evolved from simple temperature regulation to complex environmental control. Early air conditioning systems mainly focused on temperature control to provide a comfortable indoor environment. As people's requirements for the quality of life continue to increase, air conditioning technology has gradually expanded to the field of humidity control, forming a constant temperature and humidity air conditioning system. These systems can not only maintain a stable indoor temperature but also precisely control the air humidity to ensure a comfortable indoor environment and meet specific process requirements (such as clean rooms, laboratories, etc.). In recent years, with the deepening of the concept of energy conservation and emission reduction, the development of high-efficiency and energy-saving air conditioning systems has become the key direction of the industry. Modern constant temperature and humidity air conditioning systems not only need to meet the requirements of temperature and humidity control but also need to make breakthroughs in energy efficiency and intelligence to adapt to increasingly strict environmental protection standards and user needs.

[0003] Traditional constant temperature and humidity air conditioning systems usually operate in a continuous mode, maintaining the set temperature and humidity by continuously adjusting the refrigeration, heating, and dehumidification functions. Specifically, such systems generally use temperature sensors and humidity sensors to monitor indoor environmental parameters in real time and then operate in a fixed mode, such as continuously cooling or heating to the set temperature and humidity values to keep the indoor conditions stable. When the detected temperature and humidity deviate from the set values, the system adjusts through a simple feedback mechanism, such as increasing or decreasing the air volume or changing the opening of the water valve.

[0004] Although this traditional adjustment method can maintain the stability of the indoor environment to a certain extent, it has obvious limitations in terms of energy utilization efficiency and response speed. Its main problems are high energy consumption and difficulty in adaptive adjustment. Since most of these systems operate in a fixed mode and cannot dynamically adjust the working state according to the actual load, it leads to energy waste and unnecessary operating costs. Especially in the face of frequent changes in indoor and outdoor environmental parameters, the response speed and control accuracy of the system are particularly insufficient, making it difficult to meet the requirements of modern energy conservation, environmental protection, and high-precision control. Summary of the Invention

[0005] The purpose of this application is to provide an energy-saving control method for a constant temperature and humidity air conditioning system and an air conditioning control device, aiming to solve the technical problem that the existing air conditioners have insufficient adaptive adjustment ability and cannot meet the energy-saving requirements.

[0006] To achieve the above purpose, this application proposes an energy-saving control method for a constant temperature and humidity air conditioning system, and the energy-saving control method for the constant temperature and humidity air conditioning system includes:

[0007] Dynamically obtain first environmental information collected by environmental sensors in the area to be adjusted, where the environmental sensors include inner area sensors and outer area sensors;

[0008] Based on the first environmental information and the environmental conditions corresponding to the area to be adjusted, determine the multi - control strategy required for the area to be adjusted and the actuators corresponding to the multi - control strategy;

[0009] Control the actuators to perform adjustment actions according to the multi - control strategy, and dynamically monitor second environmental information fed back by the inner area sensors;

[0010] Based on the second environmental information, adjust the adjustment actions so that the area to be adjusted meets the environmental conditions.

[0011] In one embodiment, the step of dynamically obtaining first environmental information collected by environmental sensors in the area to be adjusted, where the environmental sensors include inner area sensors and outer area sensors, includes:

[0012] Identify the environmental type of the area to be adjusted, and selectively and dynamically obtain target parameters corresponding to the environmental type among the environmental parameters collected by environmental sensors in the area to be adjusted. The target parameters include temperature parameters, humidity parameters, and differential pressure parameters;

[0013] Based on the target parameters, calculate the enthalpy value parameter corresponding to the area to be adjusted, and use the enthalpy value parameter as the first environmental information.

[0014] In one embodiment, the step of adjusting the adjustment actions based on the second environmental information so that the area to be adjusted meets the environmental conditions includes:

[0015] Based on the second environmental information, analyze the environmental gap for the area to be adjusted to meet the environmental conditions;

[0016] Identify the environmental type of the area to be adjusted, and based on the environmental type and the environmental gap, dynamically divide the area to be adjusted into a coarse - control area and a stable area;

[0017] Based on the respective set adjustment logics of the coarse - control area and the stable area, adjust the adjustment actions so that the area to be adjusted meets the environmental conditions.

[0018] In one embodiment, the step of adjusting the adjustment actions based on the second environmental information so that the area to be adjusted meets the environmental conditions includes:

[0019] The multi - control strategy at least includes a damper opening adjustment strategy, the actuator includes a fresh air damper, and the adjustment action includes adjusting the opening of the fresh air damper;

[0020] Calculate the return air enthalpy value and the fresh air enthalpy value based on the second environmental information;

[0021] Obtain the fresh air temperature of the second environmental information, and based on the environmental conditions, judge the regional relationship between the fresh air temperature and the preset temperature range;

[0022] Based on the regional relationship and the magnitude relationship between the return air enthalpy value and the fresh air enthalpy value, determine the first opening degree of the fresh air valve as the basis for adjusting the opening degree of the fresh air valve, so that the area to be adjusted meets the environmental conditions.

[0023] In one embodiment, the step of adjusting the adjustment action based on the second environmental information so that the area to be adjusted meets the environmental conditions includes:

[0024] The multi - control strategy at least includes a fan frequency control strategy, the actuator includes a fan, and the adjustment action includes the frequency adjustment of the fan;

[0025] Based on the second environmental information, obtain the pressure difference data between indoors and outdoors, and obtain the frequency adjustment range corresponding to the fan to maintain a suitable indoor pressure gradient under the environmental conditions;

[0026] Based on the pressure difference data and the frequency adjustment range, use the PID algorithm to determine the frequency of the fan as the basis for adjusting the frequency of the fan, so that the area to be adjusted meets the environmental conditions.

[0027] In one embodiment, the step of adjusting the adjustment action based on the second environmental information so that the area to be adjusted meets the environmental conditions includes:

[0028] The multi - control strategy includes a chilled water valve opening adjustment strategy, the actuator includes a chilled water valve, and the adjustment action includes the opening adjustment of the chilled water valve;

[0029] Based on the return air temperature and the supply air moisture content in the second environmental information, and the temperature set value and the supply air moisture content set value corresponding to the environmental conditions, use the PID algorithm to determine the second opening degree of the chilled water valve as the basis for adjusting the opening degree of the chilled water valve, so that the area to be adjusted meets the environmental conditions, where the supply air moisture content set value is dynamically determined based on the upper limit value of the supply air moisture content set value, the lower limit value of the supply air moisture content set value, the supply air moisture content, the upper limit value of the supply air moisture content, and the lower limit value of the supply air moisture content.

[0030] In one embodiment, after the step of adjusting the second opening degree of the chilled water valve by using the PID algorithm based on the return air temperature and supply air moisture content in the second environmental information, and the temperature set value and supply air moisture content set value corresponding to the environmental conditions, the following steps are further included:

[0031] Based on the return air temperature in the second environmental information and the temperature set value corresponding to the environmental conditions, use the PID algorithm to determine the third opening degree of the chilled water valve;

[0032] Output the opening degree required corresponding to the environmental conditions from the second opening degree and the third opening degree as the basis for adjusting the opening degree of the chilled water valve.

[0033] In one embodiment, the step of adjusting the adjustment action based on the second environmental information so that the area to be adjusted meets the environmental conditions includes:

[0034] The multi - control strategy includes a hot water valve opening degree adjustment strategy, the actuator includes a hot water valve, and the adjustment action includes the opening degree adjustment of the hot water valve;

[0035] Based on the return air temperature in the second environmental information and the temperature set value corresponding to the environmental conditions, use the PID algorithm to determine the fourth opening degree of the hot water valve as the basis for adjusting the opening degree of the hot water valve so that the area to be adjusted meets the environmental conditions;

[0036] Wherein, if the fourth opening degree value reaches the preset opening degree value, monitor the working duration of the hot water valve;

[0037] If the working duration reaches the preset working duration, dynamically reduce the fourth opening degree according to the first preset interval time and the first preset value corresponding to the environmental conditions.

[0038] In one embodiment, after the step of if the working duration reaches the preset working duration, dynamically reduce the fourth opening degree according to the first preset interval time and the first preset value corresponding to the environmental conditions, the following steps are further included:

[0039] Count the number of hot water valves that reach the preset opening degree value. If the number decreases to the preset number corresponding to the environmental conditions, dynamically increase the fourth opening degree according to the second preset interval time and the second preset value corresponding to the environmental conditions.

[0040] In addition, to achieve the above - mentioned purpose, the present application also proposes an air - conditioner control device, and the air - conditioner control device includes:

[0041] An environmental sensor, the environmental sensor includes an inner area sensor and an outer area sensor, wherein the inner sensor is used to collect environmental information within the area to be adjusted, and the outer sensor is used to collect environmental information outside the area to be adjusted;

[0042] An actuator, the actuator is loaded with a control model and is used to change the environmental information through a natural medium, and the natural medium includes air;

[0043] An energy efficiency control cabinet, the energy efficiency control cabinet is connected to the environmental sensor and is used to receive the environmental information collected by the environmental sensor, and is connected to the actuator and is used to control the actuator to adjust the area to be adjusted to meet the corresponding environmental conditions according to the received environmental information. Among them, the energy efficiency control cabinet is configured with a host computer program and a control logic. When the control logic is implemented, it executes the steps of the energy-saving control method for the constant temperature and humidity air-conditioning system as described above.

[0044] One or more technical solutions proposed in this application have at least the following technical effects:

[0045] By dynamically obtaining the first environmental information collected by the environmental sensor and determining a multi-element control strategy based on this information and the set environmental conditions, the air-conditioning system can achieve precise control of the temperature, humidity and other environmental parameters in the area to be adjusted. Through the coordinated work of the multi-element control strategy and the actuator, the air-conditioning system can minimize unnecessary energy consumption on the premise of meeting the environmental conditions, greatly improving the adaptability and flexibility of the air-conditioning system. Description of the Drawings

[0046] Figure 1 is a schematic flow chart of the energy-saving control method for the constant temperature and humidity air-conditioning system in an embodiment of this application;

[0047] Figure 2 is a schematic layout diagram of the air-conditioning control device in an embodiment of this application. Detailed Embodiments

[0048] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of this application and are not used to limit this application.

[0049] For a better understanding of the technical solutions of this application, the following will be combined with the specification appendices Figure 1 as well as specific embodiments for detailed description.

[0050] Embodiment 1, in order to improve the adaptive adjustment ability of the existing air-conditioning system and the demand for energy-saving control, this application proposes an energy-saving control method for a constant temperature and humidity air-conditioning system, which specifically includes the following steps:

[0051] Step S10, dynamically obtain the first environmental information collected by the environmental sensors in the area to be adjusted, where the environmental sensors include an inner area sensor and an outer area sensor;

[0052] Step S20, based on the first environmental information and the environmental conditions corresponding to the area to be adjusted, determine the multi - control strategy required for the area to be adjusted and the actuators corresponding to the multi - control strategy;

[0053] Step S30, control the actuators to perform adjustment actions according to the multi - control strategy, and dynamically monitor the second environmental information fed back by the inner area sensor;

[0054] Step S40, based on the second environmental information, adjust the adjustment actions so that the area to be adjusted meets the environmental conditions.

[0055] That is, by dynamically obtaining the environmental information inside and outside the area to be adjusted, while making the adjustment actions of the air - conditioning system always adapt to the environment of the area to be adjusted, the environment outside the area to be adjusted is also utilized, reducing the energy consumption of the air - conditioning system. Then, the area to be adjusted is initially adjusted, and then dynamic feedback adjustment is performed according to the feedback during the adjustment process, rather than adjusting according to a fixed operation mode. It is more flexible and greatly improves the utilization rate of the energy consumption of the air - conditioning system, so that every bit of the energy consumption of the air - conditioning system is used effectively without waste.

[0056] Next, each step of the energy - saving control method for the constant - temperature and constant - humidity air - conditioning system of the present application will be described in detail:

[0057] Step S10, dynamically obtain the first environmental information collected by the environmental sensors in the area to be adjusted, where the environmental sensors include an inner area sensor and an outer area sensor.

[0058] It should be noted that the air conditioning system is equipped with a variety of environmental sensors, including but not limited to temperature sensors, humidity sensors, and differential pressure sensors. These sensors are divided into two categories: inner area sensors (installed within the area to be conditioned) and outer area sensors (installed outside the area to be conditioned). Here, the area to be conditioned is an enclosed or semi-enclosed space, such as a laboratory, data center, clean room, etc. It can be understood that, for example, laboratories have strict requirements for environmental temperature and humidity, and different experimental types may require specific temperature and humidity conditions. For example, a chemical laboratory requires the temperature to be controlled between 20°C and 25°C, and the humidity to be between 40% and 60% to ensure the accuracy of experimental results and the normal operation of instruments and equipment. Servers and other devices in a data center generate a large amount of heat during operation and require a constant temperature and humidity environment to ensure the stable operation of the devices and extend their lifespan. Generally, the temperature requirement is between 20°C and 24°C, and the relative humidity is between 40% and 55%. For places with extremely high requirements for air cleanliness, such as electronic chip manufacturing and pharmaceutical production, in addition to strict temperature and humidity control, the number of particles and the content of microorganisms in the air also need to be controlled. For example, the temperature in a chip manufacturing clean room is controlled at 22°C ± 1°C, the humidity is at 45% ± 5%, and the cleanliness reaches the corresponding level in ISO14644-1 standard, etc. For the convenience of expression, the area to be conditioned will be referred to as the indoor area in subsequent descriptions, and the area outside the area to be conditioned will be referred to as the outdoor area.

[0059] When the air conditioning system is started, all environmental sensors begin to collect environmental parameters in real time. For example, the inner area sensors collect temperature parameters, humidity parameters, differential pressure parameters, etc. inside the room, where the differential pressure parameter is the value of air pressure difference; the outer area sensors collect temperature parameters, humidity parameters, etc. outside the room, and these data can be collectively referred to as the first environmental information to distinguish it from the second environmental information that will appear later.

[0060] It can be understood that the collected first environmental information will be transmitted to the energy efficiency control cabinet by wireless or wired means for subsequent processing and analysis. Here, the energy efficiency intelligent cabinet, as the control center of the entire air conditioning system, receives the data collected by the environmental sensors and sends control instructions to the actuators. It contains components such as a microprocessor and a storage unit inside, which can process and analyze the data and make reasonable control decisions.

[0061] Furthermore, in another embodiment, step S10 includes:

[0062] Step S11, identifying the environmental type of the area to be conditioned, and selectively and dynamically obtaining the target parameters corresponding to the environmental type among the environmental parameters collected by the environmental sensors in the area to be conditioned, where the target parameters include temperature parameters, humidity parameters, and differential pressure parameters.

[0063] In another embodiment, the air conditioning system first identifies the environmental type indoors. For example, it is different types of environments such as ordinary residences, office spaces, or laboratories. Different environmental types have different requirements for temperature, humidity, air pressure, etc. According to the identified environmental type, the air conditioning system selectively obtains the environmental parameters related to this environmental type. For example, in an office environment, temperature and humidity may be more concerned about; in a laboratory environment, factors such as air cleanliness and pressure difference may also need to be considered. Through the inner area sensors and outer area sensors, the selected target parameters are collected in real time to ensure the accuracy and timeliness of the data.

[0064] Step S12, based on the target parameters, calculate the enthalpy value parameter corresponding to the area to be adjusted, and use the enthalpy value parameter as the first environmental information.

[0065] It should be noted that the enthalpy value parameter is an important parameter describing the energy state in the air, which comprehensively takes into account the influences of temperature, humidity, pressure, etc. The air conditioning system calculates the indoor enthalpy value parameter using the enthalpy formula based on the collected temperature parameter, humidity parameter, and pressure difference parameter. The specific formula is as follows:

[0066] where h is the enthalpy value parameter, is the specific heat capacity, T is the temperature parameter, H is the humidity parameter, and p is the air density.

[0067] The calculated enthalpy value parameter is used as the first environmental information and transmitted to the energy efficiency control cabinet for subsequent analysis and decision-making, making the subsequent analysis and decision-making more accurate.

[0068] Step S20, based on the first environmental information and the environmental conditions corresponding to the area to be adjusted, determine the multi-variable control strategy required for the area to be adjusted and the actuator corresponding to the multi-variable control strategy.

[0069] In this application, the user can set the required environmental conditions through the air conditioning system, such as the target temperature is 24 °C and the humidity is 50%, and store them in the energy efficiency control cabinet. After receiving the first environmental information, the energy efficiency control cabinet compares the set environmental conditions and calculates the gap between the current environment and the target environment. For example, if the indoor temperature is higher than the set value, the air conditioning system will determine that the temperature needs to be reduced. Then, according to the gap situation, an appropriate multi-variable control strategy is selected. The multi-variable control strategy can include, but is not limited to, adjusting the opening of the air valve, controlling the fan frequency, adjusting the opening of the chilled water valve, and adjusting the opening of the hot water valve, etc. For each control strategy, the corresponding actuator is determined. For example, if the temperature needs to be reduced, the fresh air valve and the fan are selected as the actuators; if the humidity needs to be increased, the humidifying device, etc. are selected.

[0070] Step S30: Control the actuator to perform adjustment actions according to the multi - control strategy, and dynamically monitor the second environmental information fed back by the inner - area sensor.

[0071] In this application, according to the selected multi - control strategy, the energy - efficiency control cabinet sends instructions to the actuator. For example, the fresh - air valve may increase its opening degree, and the fan may increase its frequency to introduce more fresh air and accelerate air circulation, etc. While performing the adjustment actions, the inner - area sensor continuously collects new environmental parameters, that is, the second environmental information, and feeds the data back to the energy - efficiency control cabinet in real time. This enables the system to immediately understand the adjustment effect.

[0072] Step S40: Based on the second environmental information, adjust the adjustment actions so that the area to be adjusted meets the environmental conditions.

[0073] After receiving the second environmental information, the energy - efficiency control cabinet analyzes the gap between the current indoor environment and the target environment again. If the gap still exists, the adjustment actions are further adjusted; if the gap has been eliminated, the current state is maintained.

[0074] Among them, during the adjustment process, different adjustment logics are adopted according to different environmental types and the size of the gap. For example, for areas with a large temperature gap, rapid adjustment in the coarse - control area may be adopted; for areas with a small temperature gap, fine adjustment in the stable area may be adopted.

[0075] Through continuous feedback and adjustment, it is ensured that the indoor environment finally reaches the set environmental conditions, providing a comfortable indoor environment. It should be noted that the setting of environmental conditions can be determined according to the type of work indoors, that is, the use of the indoor space, such as the chemical laboratory, data center, etc. mentioned above. For different indoor uses, the set environmental conditions are different. At the same time, it can also be understood that for different environmental conditions, the required environmental parameters are also different. Some environmental conditions may require constant temperature and humidity, and some require a fixed PM2.5 value, etc.

[0076] For easy understanding, a scenario example is as follows:

[0077] Suppose the user turns on the air conditioning system in summer. At this time, the inner area sensor detects that the indoor temperature is 28°C and the humidity is 60%, while the outer area sensor detects that the outdoor temperature is 35°C and the humidity is 70%. These data are transmitted to the energy efficiency control cabinet in real time and serve as the basis for subsequent control. After analysis, the air conditioning system finds that the indoor temperature is too high and needs to be cooled. Since the outdoor temperature is higher than the indoor temperature, simply increasing the opening of the fresh air valve to introduce high-temperature and high-humidity outdoor air is not conducive to indoor cooling and dehumidification. Therefore, at this time, the selection of the opening adjustment of the chilled water valve and the control of the fan frequency are used as the multi-variable control strategy, and the chilled water valve and the fan are determined as the actuators. The fan increases the frequency to accelerate the indoor air circulation and promote the faster dissipation of indoor heat. At the same time, according to the indoor return air temperature and the moisture content of the supply air, as well as the temperature set value and the moisture content set value of the supply air corresponding to the environmental conditions, the PID algorithm is used to determine the opening of the chilled water valve, and the refrigerant flow is increased by adjusting the chilled water valve to enhance the refrigeration effect. At the same time, the inner area sensor continuously monitors the changes in the indoor temperature and humidity and feeds the latest data back to the energy efficiency control cabinet. With the adjustment of the chilled water valve and the fan, the indoor temperature gradually decreases and the humidity also tends to be stable. When the indoor temperature drops to 24°C and the humidity stabilizes at 50%, the air conditioning system determines that the set conditions are met, stops further adjustment actions, and maintains the current state.

[0078] As can be seen from the above embodiments, the present application dynamically obtains the first environmental information collected by the environmental sensor, and determines the multi-variable control strategy based on this information and the set environmental conditions. The air conditioning system can achieve precise control of the indoor temperature, humidity and other environmental parameters. Through the coordinated work of the multi-variable control strategy and the actuator, the air conditioning system can minimize unnecessary energy consumption on the premise of meeting the environmental conditions, greatly improving the adaptability and flexibility of the air conditioning system.

[0079] Embodiment 2, on the basis of the above embodiment, for the purpose of improving precise control and achieving energy saving, another embodiment of the present application focuses on the step of adjusting the adjustment action based on the second environmental information so that the area to be adjusted meets the environmental conditions, including:

[0080] Step S411, based on the second environmental information, analyze the environmental gap between the area to be adjusted and the environmental conditions;

[0081] After the air conditioning system receives the second environmental information fed back by the inner area sensor, it first compares the current environmental parameters (temperature, humidity, etc.) with the set environmental conditions. For example, if the set temperature is 24°C and the current temperature is 26°C, there is a temperature gap of 2°C. According to the size and type of the gap, the air conditioning system evaluates whether the current environment is close to the set conditions. If the gap is large, a quick response is required; if the gap is small, a more refined adjustment can be adopted.

[0082] Step S412: Identify the environmental type of the area to be adjusted, and dynamically divide the area to be adjusted into a coarse control area and a stable area based on the environmental type and the environmental gap.

[0083] At this time, the air conditioning system will confirm the environmental type indoors, such as an office, a laboratory, or a residence, etc. The adjustment strategies for different environmental types are different. According to the environmental type and the environmental gap, the system dynamically divides the area to be adjusted into a coarse control area and a stable area. The coarse control area is responsible for preliminary adjustment and rapid response, while the stable area is responsible for fine control and maintaining environmental stability. The coarse control area usually allows a relatively large range of temperature and humidity fluctuations and is suitable for rapid adjustment. This is mainly to reduce the sensitivity of the system to initial environmental changes without affecting the overall control effect, thereby reducing energy consumption. The stable area requires the temperature and humidity to be maintained within a very small fluctuation range to ensure comfort and stability. This fine control method can ensure that the indoor environment always remains in the best state, thus meeting the requirements of production processes and personnel comfort. At the same time, due to the high control accuracy in the stable area, it can also effectively reduce the occurrence of phenomena such as cold and heat cancellation and dehumidification and humidification cancellation, further reducing energy consumption.

[0084] Step S413: Adjust the adjustment action based on the respective set adjustment logics of the coarse control area and the stable area, so that the area to be adjusted meets the environmental conditions.

[0085] For the coarse control area, the air conditioning system adopts a rapid response strategy, such as increasing the fan frequency, increasing the opening degree of the fresh air valve, etc., to quickly adjust the environmental parameters to be close to the set values. For the stable area, the air conditioning system adopts a fine adjustment strategy, such as finely adjusting the opening degree of the chilled water valve, optimizing the supply air temperature, etc., to ensure that the environmental parameters are maintained within the set range. Through continuous monitoring and feedback mechanisms, the air conditioning system can flexibly switch between the coarse control area and the stable area to ensure that the indoor environment finally reaches the set conditions.

[0086] For easy understanding, take a scenario example:

[0087] Suppose the air conditioning system detects that the indoor temperature is 26°C and the humidity is 55%, while the set conditions are a temperature of 24°C and a humidity of 50%. At this time, the system calculates that the temperature gap is 2°C and the humidity gap is 5%. If the air conditioning system identifies that this is an office environment and the temperature gap is relatively large (2°C), it will divide part of the area into the coarse control area to quickly reduce the temperature; at the same time, it will divide another part of the area into the stable area to ensure that the area that has approached the set conditions remains stable. Specifically in the coarse control area, the air conditioning system increases the fan frequency, reducing the temperature from 26°C to 25°C. At the same time, in the stable area, the air conditioning system finely adjusts the opening degree of the chilled water valve and further optimizes the supply air temperature, gradually reducing the temperature to 24°C and stabilizing the humidity at 50%.

[0088] As can be seen from the above embodiments, by dynamically dividing the area to be adjusted into a coarse control area and a stable area, and adopting different adjustment logics for different areas, the air conditioning system can achieve an organic combination of rapid response and fine control. Moreover, the zoning control strategy enables the air conditioning system to apply the most suitable adjustment method in different areas, thereby significantly improving the overall control accuracy. At the same time, through reasonable zoning control and optimized adjustment strategies, the air conditioning system can minimize unnecessary energy consumption on the premise of meeting environmental conditions.

[0089] Embodiment 3. On the basis of the above embodiments, in order to further improve precise control and achieve the purpose of energy conservation, another embodiment of the present application focuses on that the multi - control strategy at least includes a damper opening adjustment strategy. The actuator includes a fresh air damper, and the adjustment action includes the opening adjustment of the fresh air damper. The step of adjusting the adjustment action based on the second environmental information to make the area to be adjusted meet the environmental conditions includes:

[0090] Step S421: Calculate the return air enthalpy value and the fresh air enthalpy value based on the second environmental information.

[0091] Step S422: Obtain the fresh air temperature of the second environmental information, and based on the environmental conditions, judge the regional relationship between the fresh air temperature and the preset temperature range.

[0092] Step S423: Based on the regional relationship and the magnitude relationship between the return air enthalpy value and the fresh air enthalpy value, determine the first opening of the fresh air damper as the basis for the opening adjustment of the fresh air damper, so that the area to be adjusted meets the environmental conditions.

[0093] Another embodiment of the present application elaborates on the damper opening adjustment strategy as one of the multi - control strategies. It mainly controls the fresh air intake by dynamically adjusting the opening of the fresh air damper to adjust the indoor environmental parameters.

[0094] In the current embodiment, the air conditioning system receives the second environmental information fed back by the inner - area sensor, including parameters such as return air temperature and humidity, and then calculates the return air enthalpy value (indoor air) and the fresh air enthalpy value (outdoor air) using the enthalpy formula.

[0095] The air conditioning system defines a reasonable temperature range (for example, 16°C to 25°C) according to the set environmental conditions, and sets the upper and lower limits of the interface opening to 50% - 100% by default. Then it obtains the fresh air temperature, compares the fresh air temperature with the preset temperature range to determine whether the fresh air is suitable for introduction. If the fresh air temperature is within the range, it is suitable for introduction; if it exceeds the range, further evaluation is required.

[0096] Specifically, compare the return air enthalpy value and the fresh air enthalpy value to evaluate the impact of introducing fresh air on the indoor environment. Adjust the opening degree according to specific enthalpy value comparison rules, such as:

[0097] When 25°C > fresh air temperature ≥ 16°C, if the fresh air enthalpy value < return air enthalpy value - 3, the fresh air valve is fully open (100% opening degree).

[0098] When the fresh air temperature ≥ 25°C, the fresh air valve is fully closed (0% opening degree).

[0099] In other cases, dynamically adjust the opening degree of the fresh air valve according to actual requirements and environmental conditions, usually between 50% - 100%.

[0100] Finally, determine the first opening degree of the fresh air valve and adjust the opening degree accordingly to ensure that an appropriate amount of fresh air is introduced to achieve the set environmental conditions.

[0101] For easy understanding, take a scenario as an example:

[0102] Suppose the air conditioning system detects that the indoor temperature is too high and more low-temperature fresh air needs to be introduced for cooling. At this time, the air conditioning system selects the air valve opening degree adjustment strategy, determines the fresh air valve as the actuator, and is ready to adjust the opening degree. If the air conditioning system detects that the indoor return air temperature is 26°C and the humidity is 60%, the calculated return air enthalpy value is 50 kJ / kg; the outdoor fresh air temperature is 20°C and the humidity is 70%, and the calculated fresh air enthalpy value is 45 kJ / kg. Assume that the set temperature range is 16°C to 25°C, and the detected fresh air temperature is 20°C, which is within the preset range, so it is considered that the fresh air is suitable for introduction. Since the fresh air temperature is 20°C (within the range of 16°C to 25°C), and the fresh air enthalpy value (45 kJ / kg) is lower than the return air enthalpy value (50 kJ / kg) minus 3 kJ / kg, that is, 47 kJ / kg, the air conditioning system decides to fully open the fresh air valve (100%) to introduce more low-temperature fresh air and quickly reduce the indoor temperature.

[0103] It can be seen from the above embodiments that the present application calculates the return air enthalpy value and the fresh air enthalpy value, and dynamically adjusts the opening degree of the fresh air valve according to specific enthalpy value comparison rules. The air conditioning system can achieve precise control of the fresh air introduction volume. At the same time, by precisely controlling the opening degree of the fresh air valve, the air conditioning system can minimize unnecessary energy consumption on the premise of meeting the environmental conditions.

[0104] Embodiment 4, on the basis of the above embodiments, in order to further improve precise control and achieve the purpose of energy saving, another embodiment of the present application focuses on that the multi-control strategy at least includes a fan frequency control strategy, the actuator includes a fan, the adjustment action includes the frequency adjustment of the fan, and the step of adjusting the adjustment action based on the second environmental information to make the area to be adjusted meet the environmental conditions includes:

[0105] Step S431: Based on the second environmental information, obtain the pressure difference data between indoors and outdoors, and obtain the frequency adjustment range corresponding to the appropriate pressure gradient maintained indoors by the fan under the environmental conditions.

[0106] In this embodiment, the air conditioning system obtains the pressure difference data between indoors and outdoors through pressure difference sensors installed indoors and outdoors. Since rooms with constant temperature and humidity air conditioning systems generally need to maintain a certain positive pressure, this pressure difference data is crucial for maintaining a stable indoor pressure environment. At the same time, according to the set environmental conditions, the air conditioning system pre-defines a reasonable fan frequency adjustment range (for example, 30 Hz to 50 Hz), which is set to maintain the indoor pressure gradient within an appropriate range.

[0107] Step S432: Based on the pressure difference data and the frequency adjustment range, use the PID algorithm to determine the frequency of the fan as the basis for adjusting the frequency of the fan, so that the area to be adjusted meets the environmental conditions.

[0108] Specifically, the air conditioning system uses the PID algorithm (Proportional-Integral-Derivative control algorithm) combined with the obtained pressure difference data between indoors and outdoors and the set frequency adjustment range to accurately calculate the optimal frequency of the fan. Among them, proportional control (P) directly adjusts the fan frequency according to the difference between the current indoor and outdoor pressure difference and the target pressure difference; integral control (I) accumulates the historical pressure difference error and gradually eliminates the steady-state error to ensure that the indoor pressure is stably within an appropriate range for a long time; derivative control (D) predicts the future pressure difference change trend and adjusts the fan frequency in advance to avoid adverse effects on the indoor environment due to excessive pressure fluctuations. Finally, the optimal frequency of the fan is determined, and the frequency is adjusted accordingly to ensure that an appropriate pressure gradient is maintained indoors to meet the set environmental conditions. That is, through continuous monitoring and feedback mechanisms, the air conditioning system can flexibly adjust the fan frequency under different working conditions, ensure that the indoor environment is always in the best state, meet the indoor positive pressure requirement at the same time, and prevent external pollutants from entering the room.

[0109] For ease of understanding, take a scenario example:

[0110] Suppose the air conditioning system detects that the indoor pressure is slightly lower than the outdoor pressure, and the current indoor-outdoor pressure difference is -5 Pa (assuming the target pressure difference is between 0 and 5 Pa). It is necessary to increase the indoor pressure. At this time, the air conditioning system selects the fan frequency control strategy, determines that the fan is the actuator, and is ready to adjust the frequency. According to the set conditions, the air conditioning system determines that the fan frequency adjustment range is from 30 Hz to 50 Hz. Through PID algorithm calculation, the air conditioning system decides to adjust the fan frequency from the current 40 Hz to 45 Hz to increase the air supply volume and raise the indoor pressure. At the same time, the air conditioning system continuously monitors the indoor-outdoor pressure difference data to ensure that the adjustment effect meets the expectations. When the indoor-outdoor pressure difference reaches 3 Pa, the fan frequency remains stable to maintain the indoor pressure within a suitable range.

[0111] As can be seen from the above embodiments, by obtaining the indoor-outdoor pressure difference and combining the PID algorithm to adjust the fan frequency, the air conditioning system can achieve precise control of the indoor pressure, thereby maintaining a suitable pressure gradient indoors. At the same time, through reasonable adjustment of the fan frequency, the air conditioning system can minimize unnecessary energy consumption on the premise of meeting the environmental conditions.

[0112] Embodiment 5. On the basis of the above embodiments, in order to further improve precise control and achieve the purpose of energy conservation, another embodiment of the present application focuses on that the multi-control strategy includes a cold water valve opening adjustment strategy, the actuator includes a cold water valve, the adjustment action includes the opening adjustment of the cold water valve, and the step of adjusting the adjustment action based on the second environmental information to make the area to be adjusted meet the environmental conditions includes:

[0113] Step S441: Based on the return air temperature and supply air moisture content in the second environmental information, and the temperature set value and supply air moisture content set value corresponding to the environmental conditions, use the PID algorithm to determine the second opening of the cold water valve as the basis for adjusting the opening of the cold water valve, so that the area to be adjusted meets the environmental conditions, where the supply air moisture content set value is dynamically determined based on the upper limit value of the supply air moisture content set value, the lower limit value of the supply air moisture content set value, the supply air moisture content, the upper limit value of the supply air moisture content, and the lower limit value of the supply air moisture content.

[0114] Another embodiment of the present application elaborates on the cold water valve opening adjustment strategy as one of the multi-control strategies, mainly by dynamically adjusting the opening of the cold water valve to control the refrigerant flow rate to achieve the adjustment of indoor environmental parameters.

[0115] In the current embodiment, the air conditioning system receives the second environmental information fed back by the inner area sensor, including parameters such as the return air temperature and the moisture content of the supply air. Then, according to the set environmental conditions, it obtains the temperature set value and the moisture content set value of the supply air. Using the PID algorithm in combination with the return air temperature, the moisture content of the supply air, the temperature set value, and the moisture content set value of the supply air, it accurately calculates the optimal opening degree of the chilled water valve. Among them, proportional control (P): directly adjusts the valve opening degree according to the gap between the current parameter and the target value; integral control (I): accumulates historical errors and gradually eliminates the steady-state error; derivative control (D): predicts the future change trend and adjusts the valve opening degree in advance to avoid overshoot. Finally, it determines the optimal opening degree of the chilled water valve and adjusts the opening degree accordingly to ensure the introduction of an appropriate amount of refrigerant to achieve the set environmental conditions.

[0116] It should be specifically explained that the moisture content set value of the supply air is dynamically determined. Specifically, according to the set moisture content set value of the supply air and its upper and lower limits (such as 5 g / kg to 7 g / kg), it dynamically adjusts the moisture content set value of the supply air. According to the gap between the actual moisture content of the supply air and the set value, it adjusts the moisture content set value of the supply air in real time to ensure that it fluctuates within a reasonable range.

[0117] Specifically, when the return air temperature is lower than the set temperature, the air conditioning system enters the humidity priority adjustment mode, and the determination of the moisture content set value of the supply air is as follows:

[0118]

[0119] Among them, is the moisture content set value of the supply air, is the upper limit value of the moisture content set value of the supply air, is the lower limit value of the moisture content set value of the supply air, is the humidity monitoring value, is the upper limit value of humidity, is the lower limit value of humidity.

[0120] Furthermore, after step S441, it further includes:

[0121] Step S442, based on the return air temperature in the second environmental information and the temperature set value corresponding to the environmental conditions, uses the PID algorithm to determine the third opening degree of the chilled water valve;

[0122] Step S443, outputs the opening degree required by the environmental conditions from the second opening degree and the third opening degree as the basis for adjusting the opening degree of the chilled water valve.

[0123] When the return air temperature is not lower than the set temperature, the air conditioning system uses the PID algorithm to combine the return air temperature and the temperature set value, accurately calculates the third opening degree of the chilled water valve, and then compares the second opening degree (for example, 60%) with the third opening degree (for example, 70%), and selects the relatively larger or smaller opening degree as the basis for adjusting the final opening degree of the chilled water valve to ensure that the environmental conditions can be more effectively met. Among them, the selection basis is determined by the environmental conditions. For example, the final adjustment of the chilled water valve is carried out according to the selected larger opening degree to ensure that the indoor environmental parameters can reach the set conditions quickly and stably.

[0124] For easy understanding, a scenario example is as follows:

[0125] Suppose the air conditioning system detects that the indoor temperature is too high and needs to lower the temperature. At this time, the air conditioning system selects the chilled water valve opening adjustment strategy, determines the chilled water valve as the actuator, and is ready to adjust the opening degree. If the detected indoor return air temperature is 26°C and the supply air moisture content is 8 g / kg, while the set temperature is 24°C and the supply air moisture content set value is 6 g / kg. According to the PID algorithm calculation, the air conditioning system decides to adjust the chilled water valve opening degree from the current 50% to 60% to increase the refrigerant flow rate, quickly lower the indoor temperature and adjust the humidity. Suppose the supply air moisture content set value is 6 g / kg, and the upper and lower limits are 5 g / kg and 7 g / kg respectively. When the actual supply air moisture content is close to the upper limit, the air conditioning system appropriately reduces the supply air moisture content set value, and vice versa.

[0126] When the return air temperature is lower than the set temperature, suppose the return air temperature is 23°C, the set temperature is 24°C, the monitored supply air moisture content is 7 g / kg, and the supply air moisture content set value is 6 g / kg. According to the PID algorithm calculation, the air conditioning system decides to adjust the chilled water valve opening degree to 60% to adjust the humidity and keep the temperature stable.

[0127] When the return air temperature is equal to or higher than the set temperature, suppose the return air temperature is 25°C, the set temperature is 24°C, the temperature monitoring value is 25°C, and the temperature set value is 25°C. According to the PID algorithm calculation, the air conditioning system decides to adjust the chilled water valve opening degree to 70%. At the same time, the opening degree in the humidity priority adjustment mode is 60%, so finally 70% is selected as the opening degree of the chilled water valve.

[0128] From the above embodiments, it can be seen that through the PID adjustment strategy based on the return air temperature and the supply air moisture content, the system of the present application can achieve precise control of the indoor humidity and temperature. At the same time, through reasonable adjustment of the chilled water valve opening degree, the air conditioning system can minimize unnecessary energy consumption on the premise of meeting the environmental conditions.

[0129] Embodiment Six. On the basis of the above embodiments, in order to further improve precise control and achieve the purpose of energy conservation, another embodiment of the present application focuses on that the multi-control strategy includes a hot water valve opening adjustment strategy, the actuator includes a hot water valve, the adjustment action includes the opening adjustment of the hot water valve, and the step of adjusting the adjustment action based on the second environmental information to make the area to be adjusted meet the environmental conditions includes:

[0130] Step S451, based on the return air temperature in the second environmental information and the temperature set value corresponding to the environmental conditions, use the PID algorithm to determine the fourth opening of the hot water valve as the basis for the opening adjustment of the hot water valve, so that the area to be adjusted meets the environmental conditions;

[0131] Wherein, if the fourth opening value reaches the preset opening value, monitor the working duration of the hot water valve;

[0132] If the working duration reaches the preset working duration, dynamically reduce the fourth opening according to the first preset interval time and the first preset value corresponding to the environmental conditions.

[0133] Another embodiment of the present application describes the hot water valve opening adjustment strategy as one of the multi-control strategies, mainly by dynamically adjusting the opening of the hot water valve to control the hot water flow rate to achieve the adjustment of indoor environmental parameters.

[0134] In the current embodiment, the air conditioning system receives the second environmental information fed back by the inner area sensor, focuses on the return air temperature, then obtains the temperature set value according to the set environmental conditions, uses the PID algorithm to combine the return air temperature and the temperature set value, accurately calculates the optimal opening (the fourth opening) of the hot water valve, finally determines the fourth opening of the hot water valve, and makes a preliminary opening adjustment accordingly to ensure the introduction of an appropriate amount of hot water to quickly raise the indoor temperature and maintain it near the set value.

[0135] The control of the hot water valve opening is mainly adjusted according to the relationship between the return air temperature and the set value, which is divided into two scenarios, and there are also hot water priority logic and the strategy of reducing the indoor temperature set value, aiming to achieve energy conservation and stable system operation while meeting the indoor temperature requirements.

[0136] Scenario 1: When the return air temperature < temperature setpoint - 1, the hot water valve opening is adjusted by PID according to the return air temperature and temperature setpoint - 1. At this time, the air conditioning system takes the difference between the return air temperature and temperature setpoint - 1 as the input, and calculates the opening increment that the hot water valve needs to adjust through the PID algorithm. For example, if the return air temperature is much lower than temperature setpoint - 1, the PID algorithm may calculate a large opening increment, increasing the hot water valve opening to allow more hot water to enter the air conditioning system to quickly raise the indoor temperature; conversely, if the difference is small, the opening increment will also be correspondingly small, achieving a more refined temperature adjustment;

[0137] Scenario 2: When the return air temperature < temperature setpoint, the hot water valve opening is adjusted by PID according to the return air temperature and temperature setpoint. Similarly, the PID algorithm is used to adjust the hot water valve opening according to the difference between the return air temperature and temperature setpoint. However, since the temperature is closer to the setpoint in this scenario, the adjustment range will be relatively smaller than in Scenario 1, and more attention is paid to precise control to avoid temperature overshoot. For example, when the return air temperature is only slightly lower than the temperature setpoint, the opening increment calculated by the PID algorithm will be small, causing the hot water supply to increase slowly and the indoor temperature to rise steadily to the setpoint.

[0138] It should be noted that when the fourth opening of the hot water valve reaches the preset opening value (e.g., 90%), the system starts to monitor the working duration of the hot water valve, records the time when the hot water valve maintains the preset opening value, and ensures that the subsequent processing logic can respond in a timely manner. When the working duration of the hot water valve reaches the preset working duration (e.g., 30 minutes), the air conditioning system enters the protection mode to avoid energy consumption waste. According to the first preset interval time (e.g., 5 minutes) and the first preset value (e.g., decreasing by 5% each time) corresponding to the environmental conditions, the fourth opening of the hot water valve is dynamically decreased. During the process of decreasing the opening, the system continuously monitors the indoor temperature to ensure that the environmental conditions are always met.

[0139] Further, after step S451, it also includes:

[0140] Count the number of hot water valves that reach the preset opening value. If the number decreases to the preset number corresponding to the environmental conditions, the fourth opening is dynamically increased according to the second preset interval time and the second preset value corresponding to the environmental conditions.

[0141] That is, the air conditioning system continuously monitors the opening conditions of all hot water valves, records the number of hot water valves that reach the preset opening value (e.g., 90%). When the number of hot water valves that reach the preset opening value decreases to the preset number (e.g., 1) corresponding to the environmental conditions, the air conditioning system enters the recovery mode. According to the second preset interval time (e.g., 10 minutes) and the second preset value (e.g., increasing by 5% each time) corresponding to the environmental conditions, the fourth opening of the hot water valve is dynamically increased. During the process of increasing the opening, the system continuously monitors the indoor temperature to ensure that the environmental conditions are always met.

[0142] For better understanding, a scenario example is given as follows:

[0143] When there are several air handling units (assumed to be 4 units) serving the indoor area. Under the hot water priority logic, considering that there may be insufficient reheating hot water in individual projects, in order to prioritize the reheating amount in key areas, there are the following different situations:

[0144] Situation 1: All 4 air handling units are fully open: When all 4 air handling units serving the indoor area are turned on and the opening degrees of all hot water valves are maintained at 95% for 20 minutes, it indicates that the current air conditioning system may have insufficient hot water supply but the indoor temperature has not yet reached the ideal state. It may also be due to a large heat load or low hot water utilization efficiency. At this time, every 6 minutes, the air conditioning system will reduce the opening degree of all air handling unit hot water valves by 10% (the minimum reduction is to 20%) based on the existing upper limit value. This is to reasonably allocate hot water resources and prioritize the reheating amount demand in key areas under the condition of limited hot water. For example, if the upper limit value of the hot water valve of a certain air handling unit is 100%, then after 6 minutes, its opening degree will be adjusted to 90%, and after another 6 minutes, it will be adjusted to 80%, and so on, until the minimum reduction to 20%. This adjustment method can prevent the over-dispersed supply of hot water and avoid drastic fluctuations in indoor temperature caused by a sudden large reduction in hot water supply, and maintain the stability of the system to a certain extent;

[0145] Situation 2: 3 or 2 air handling units are open: When 3 or 2 air handling units are turned on and the hot water valves maintain the maximum opening degree, the upper limit of the valve opening degree remains unchanged. At this time, while reducing the total supply of hot water, the air conditioning system will concentrate more hot water resources on the turned-on air handling units to ensure the reheating amount in key areas. The system will continuously observe the change of indoor temperature and decide the next operation according to the temperature situation;

[0146] Situation 3: 1 air handling unit is open: When only 1 air handling unit is turned on and maintains the maximum opening degree, the upper limit of the valve of this air handling unit will increase by 10% every 6 minutes based on the current value (the upper limit is the upper limit value of the panel hot water valve and will not be adjusted further). This is because when only one air handling unit is operating, the area served by this air handling unit is regarded as a key guarantee area. By gradually increasing the valve opening degree, the reheating amount demand in this area can be met, and the best balance point of hot water supply can be found, which can not only meet the indoor temperature demand but also achieve energy conservation and system stability under the condition of limited hot water. For example, if the current opening degree of the hot water valve of a certain air handling unit is 50%, then after 6 minutes, it will be adjusted to 60%, and after another 6 minutes, it will be adjusted to 70%, until the upper limit value of the panel hot water valve is reached or the indoor temperature reaches the ideal state.

[0147] By adjusting the above-mentioned strategies for the number of operating air handling units and the corresponding valve opening degrees, when the hot water quantity is insufficient, the air conditioning system preferentially guarantees the reheating quantity in key areas, reasonably distributes the hot water resources, and realizes energy conservation and the optimized operation of the system.

[0148] In addition, in another embodiment, a strategy for reducing the indoor temperature set value is also set. Specifically, when the fresh air temperature < 15°C, the air conditioning system will delay for a period of time, such as 20 minutes, before responding. This is to avoid frequent adjustment of the temperature set value due to short-term fluctuations in the fresh air temperature, and to ensure the stability and reliability of the temperature adjustment. After a delay of 20 minutes, all temperature set values are reduced by 2°C. For example, if the original indoor temperature set value is 22°C, it will become 20°C after adjustment. The purpose of doing this is to utilize the low outdoor temperature environment and appropriately reduce the indoor temperature set value at an appropriate time to reduce the cooling energy consumption. Because when the fresh air temperature is relatively low, appropriately reducing the indoor temperature set value can allow more outdoor cold air to participate in the indoor temperature regulation, reduce the operating time of the refrigeration equipment in the air conditioning system, and thus achieve energy conservation. When the fresh air temperature ≥ 15°C, the system resumes the normal temperature set value. This is because when the outdoor temperature rises, continuing to use a lower temperature set value may cause the indoor environment to be too cold, affecting the comfort of personnel, and may also increase the heating energy consumption. Therefore, it is necessary to resume the normal temperature set value to ensure the comfort of the indoor environment and continue to adjust the temperature according to the actual situation.

[0149] As can be seen from the above embodiments, through the PID adjustment strategy based on the return air temperature and the temperature set value, the air conditioning system can achieve precise control of the indoor temperature. At the same time, through reasonable adjustment of the hot water valve opening degree, the air conditioning system can minimize unnecessary energy consumption on the premise of meeting the environmental conditions. When the hot water valve opening degree reaches the preset maximum opening degree and the working duration exceeds the preset duration, the air conditioning system will dynamically reduce the hot water valve opening degree to prevent the equipment from running at high load for a long time, and gradually resume the opening degree when the quantity is reduced to the preset quantity.

[0150] The present application also provides an air conditioning control device. The air conditioning control device includes:

[0151] An environment sensor, the environment sensor includes an inner area sensor and an outer area sensor, wherein the inner sensor is used to collect the environmental information in the area to be adjusted, and the outer sensor is used to collect the environmental information outside the area to be adjusted;

[0152] An actuator, the actuator is loaded with a control model and is used to change the environmental information through a natural medium, and the natural medium includes air;

[0153] An energy efficiency control cabinet is connected to the environmental sensor and is configured to receive the environmental information collected by the environmental sensor. It is also connected to the actuator and is configured to control the actuator to adjust the area to be adjusted to meet the corresponding environmental conditions according to the received environmental information. Among them, the energy efficiency control cabinet is configured with a host computer program and a control logic. When the control logic is implemented, it executes the steps of the embodiment of the energy-saving control method for the constant temperature and humidity air conditioning system as described above.

[0154] It should be briefly explained that the air conditioning control device of the present application (for the convenience of description, it is referred to as an air conditioning system in the foregoing embodiments) is composed of hardware facilities and software facilities. Among them, the hardware facilities include environmental sensors, such as temperature sensors: used to collect temperature information inside and outside the room, including return air temperature, fresh air temperature, etc. These sensors are distributed in different areas of the room (such as ceiling, wall, etc.) and near the outdoor unit to obtain accurate temperature data; humidity sensors: installed inside and outside the room, mainly responsible for measuring the humidity of the air and providing data support for humidity control. Its position is generally close to the air circulation path to ensure that it can accurately reflect the actual humidity situation; differential pressure sensors: usually installed in the air duct of the air conditioning system to monitor the pressure difference between the air supply outlet and the return air outlet, which is crucial for ensuring the reasonable distribution and circulation of indoor air, etc. The hardware facilities also include actuators, such as air valve actuators: connected to the fresh air valve and the return air valve, and adjust the opening of the valve according to the control signal to control the ratio of fresh air and return air. For example, when more fresh air is needed, the air valve actuator will increase the opening of the fresh air valve; water valve actuators: used to control the opening of the chilled water valve and the hot water valve. When cooling or heating is required, the water valve actuator will adjust the opening and closing degree of the water valve according to the system instruction to regulate the flow of chilled water or hot water; fan frequency converters: connected to the fan motor, and adjust the air supply volume by changing the frequency of the fan. For example, in the energy-saving mode, the fan frequency converter can reduce the fan frequency, reduce the air supply volume and energy consumption, etc. The hardware facilities also include an energy efficiency control cabinet: as the control center of the entire system, it receives the data collected by the sensors and sends control instructions to the actuators. It contains components such as a microprocessor and a storage unit inside, and can process and analyze the data and make reasonable control decisions. Of course, in addition, there is also an air handling unit (AHU): which contains components such as a fan, a filter, an evaporator, and a condenser, and is the core equipment for air handling. The fan prompts the air to circulate in the system, the filter filters the dust and impurities in the air, and the evaporator and condenser are used for heat exchange to achieve the cooling or heating function, which will not be listed one by one here.

[0155] The software facilities include the host computer program and control logic: running in the microprocessor of the energy efficiency control cabinet, it contains various control algorithms and strategies, such as the PID control algorithm for adjusting the fan frequency, the opening degree of the water valve, etc. It can generate control instructions according to the data collected by the sensors according to the preset rules (such as energy-saving control strategies, temperature and humidity control strategies, etc.) and send them to the corresponding actuators. At the same time, the host computer program can also record the system operation data for subsequent analysis and optimization.

[0156] The sensors transmit the collected data to the energy efficiency control cabinet through signal lines (wired methods, such as using shielded cables to reduce electromagnetic interference) or wireless communication modules (such as wireless communication technologies like ZigBee, Wi-Fi, etc.).

[0157] The energy efficiency control cabinet is connected to the actuators (air valve actuator, water valve actuator, fan frequency converter) through control signal lines, and sends control instructions to the actuators to drive the actuators to perform corresponding actions, such as adjusting the valve opening degree, fan frequency, etc.

[0158] The host computer program inside the energy efficiency control cabinet cooperates with components such as the storage unit and the microprocessor. The program reads control parameters and historical data from the storage unit, uses the computing power of the microprocessor for data processing and control instruction generation, then sends the instructions to the actuators, and stores the new data in the storage unit.

[0159] Through the combination of software and hardware, any embodiment of the above energy-saving control method for the constant temperature and humidity air-conditioning system can be realized, which will not be elaborated here.

[0160] Exemplarily, referring to Figure 2 , the air-conditioning control device can be laid out as shown in the figure. According to the functional division, it can specifically include:

[0161] Indoor environment feedback module 10: It includes a temperature sensor 11 and a humidity sensor 12; there are 2 AI (analog input) points, which are used to feedback the indoor environment state to the PLC (programmable logic controller) to provide the indoor environment data basis for subsequent control and adjustment.

[0162] Outdoor environment feedback 20: It also includes a temperature sensor 11 and a humidity sensor 12; there are also 2 AI points, which transmit the outdoor environment state information to the PLC and combine it with the indoor environment information to provide a basis for the overall control strategy of the system.

[0163] Fresh air valve opening control module 30: It includes a fresh air valve; its functions include:

[0164] Opening feedback: 1 AI point, which real-time feedbacks the opening degree of the fresh air valve to the PLC, so that the system knows the current valve opening state.

[0165] Opening control: 1 AO (analog output) point. The PLC calculates the comparison result of the enthalpy values based on the outdoor and indoor air temperature and humidity, outputs a control signal to the damper actuator, and adjusts the opening of the fresh air damper to achieve precise control of the fresh air intake volume.

[0166] Fan frequency control module 40: It includes a supply fan; its functions include:

[0167] Frequency feedback and control: 1 AI point feeds back the fan operating frequency, and 1 AO point outputs the fan operating frequency. By comparing the indoor and outdoor pressure difference with the set pressure difference, the fan frequency is adjusted to maintain the stability of the indoor and outdoor pressure difference.

[0168] Switch status feedback and control: 1 DI (digital input) point feeds back the on / off status of the fan, and 1 AO point outputs the on / off status command, which is convenient for monitoring and controlling the start and stop of the fan.

[0169] Cooling coil water valve opening control module 50: It includes a chilled water valve; its functions include:

[0170] Opening feedback: 1 AI point feeds back the opening of the chilled water valve;

[0171] Opening control: 1 AO point outputs the opening of the chilled water valve. The humidity priority control strategy is adopted. When the return air temperature is different, the PID (Proportional-Integral-Derivative) adjustment of the moisture content or temperature is carried out respectively, and the final opening of the chilled water valve is determined according to the rules to achieve effective adjustment of the air temperature and humidity.

[0172] Heating coil water valve opening control 60: It includes a hot water valve; its functions include:

[0173] Opening feedback: 1 AI point feeds back the opening of the hot water valve;

[0174] Opening control: 1 AO point outputs the opening of the hot water valve. When the monitored value of the return air temperature is less than the set value of the return air temperature - 1°C, the opening of the hot water valve is PID-adjusted according to the monitored value and the set value - 1°C, which is used to increase the air temperature when needed.

[0175] Control panel 70: It can be set in the fan room or the clean room. Operators can view the operating conditions of the fan through it, input or adjust various control parameters, which is convenient for the operation and management of the system.

[0176] Other functions (not shown).

[0177] Fan differential pressure alarm: Monitor the differential pressure before and after the fan. When an abnormality occurs, input a fault alarm signal to the PLC to facilitate timely detection of possible problems with the fan.

[0178] Filter differential pressure alarm: Monitor the differential pressure before and after the filter. When the differential pressure reaches a certain level, it prompts that the filter needs to be replaced to ensure the air filtration effect of the system.

[0179] Electric heating humidification: Turned on in winter, perform PID adjustment according to the monitored humidity value and the set value, output the moisture content of the supply air, and maintain a suitable indoor humidity.

[0180] In addition, Figure 2 the arrow in

[0181] The above are only partial embodiments of this application, and do not limit the scope of implementation of this application. Any equivalent structural or equivalent process transformation made using the content of the specification and drawings of this application, or directly or indirectly applied in other related technical fields, are similarly included in the protection scope of this application.

Claims

1. A constant temperature and humidity air conditioning system energy saving control method, characterized in that: The constant temperature and humidity air conditioning system energy-saving control method comprises: Dynamically acquiring first environmental information collected by an environmental sensor of the area to be adjusted, wherein the environmental sensor includes an inner area sensor and an outer area sensor; Based on the first environmental information and the environmental conditions corresponding to the area to be adjusted, determining the multivariate control strategy required by the area to be adjusted and the actuator corresponding to the multivariate control strategy; Controlling the actuator to perform a regulating action according to the multivariate control strategy, and dynamically monitoring the second environmental information fed back by the inner area sensor; Based on the second environmental information, adjusting the adjustment action so that the area to be adjusted meets the environmental condition; Wherein, when the multivariate control strategy includes a cold water valve opening adjustment strategy, the actuator includes a cold water valve, the adjustment action includes adjusting the opening of the cold water valve, and adjusting the adjustment action includes: Adjustment 1: Based on the return air temperature and supply air humidity content in the second environmental information, as well as the temperature setting value and supply air humidity setting value corresponding to the environmental conditions, the PID algorithm is used to determine the second opening of the cold water valve as the opening adjustment basis of the cold water valve, so that the area to be adjusted meets the environmental conditions, wherein when the return air temperature is lower than the temperature setting value, the humidity priority adjustment mode is entered; the formula for determining the supply air humidity setting value is as follows: ,in, is the supply air humidity setting value, is the upper limit of the supply air humidity setting value. is the lower limit of the supply air humidity setting value, is the humidity monitoring value, is the upper humidity limit, is the lower limit of humidity; Adjustment 2: when the return air temperature is not lower than the temperature setting value, based on the return air temperature in the second environmental information and the temperature setting value corresponding to the environmental condition, a PID algorithm is used to determine the third opening of the cold water valve; The opening required corresponding to the environmental condition is output from the second opening and the third opening as a basis for adjusting the opening of the cold water valve, so that the area to be adjusted meets the environmental condition.

2. The constant temperature and humidity air conditioning system energy saving control method according to claim 1, characterized in that: The step of dynamically acquiring first environmental information collected by an environmental sensor of the area to be adjusted, wherein the environmental sensor includes an inner area sensor and an outer area sensor, comprises: Identify the environment type of the area to be adjusted, and selectively and dynamically obtain target parameters corresponding to the environment type from the environmental parameters collected by the environmental sensor of the area to be adjusted, the target parameters including temperature parameters, humidity parameters and pressure difference parameters; Based on the target parameter, an enthalpy parameter corresponding to the area to be adjusted is calculated, and the enthalpy parameter is used as the first environmental information.

3. The constant temperature and humidity air conditioning system energy saving control method according to claim 1, characterized in that: The step of adjusting the adjustment action based on the second environmental information so that the area to be adjusted meets the environmental condition includes: Based on the second environmental information, analyzing the environmental gap between the area to be adjusted and the environmental condition; Identifying the environment type of the area to be adjusted, and dynamically dividing the area to be adjusted into a coarse control area and a stable area based on the environment type and the environment gap; Based on the adjustment logics set in the coarse control area and the stable area respectively, the adjustment action is adjusted so that the area to be adjusted meets the environmental conditions.

4. The constant temperature and humidity air conditioning system energy saving control method according to claim 1, characterized in that: The step of adjusting the adjustment action based on the second environmental information so that the area to be adjusted meets the environmental condition includes: The multivariate control strategy at least includes an air valve opening adjustment strategy, the actuator includes a fresh air valve, and the adjustment action includes adjusting the opening of the fresh air valve; Based on the second environmental information, calculating the return air enthalpy value and the fresh air enthalpy value; Acquire the fresh air temperature of the second environmental information, and determine the regional relationship between the fresh air temperature and a preset temperature range based on the environmental conditions; Based on the regional relationship and the magnitude relationship between the return air enthalpy value and the fresh air enthalpy value, the first opening of the fresh air valve is determined as a basis for adjusting the opening of the fresh air valve so that the area to be adjusted meets the environmental conditions.

5. The constant temperature and humidity air conditioning system energy saving control method according to claim 1, characterized in that: The step of adjusting the adjustment action based on the second environmental information so that the area to be adjusted meets the environmental condition includes: The multivariate control strategy at least includes a fan frequency control strategy, the actuator includes a fan, and the adjustment action includes frequency adjustment of the fan; Based on the second environmental information, obtain the pressure difference data between indoor and outdoor, and obtain the frequency adjustment range corresponding to the fan maintaining the appropriate indoor pressure gradient under the environmental conditions; Based on the pressure difference data and the frequency adjustment interval, a PID algorithm is used to determine the frequency of the fan as a basis for adjusting the frequency of the fan, so that the area to be adjusted meets the environmental conditions.

6. The constant temperature and humidity air conditioning system energy saving control method according to claim 1, characterized in that: The step of adjusting the adjustment action based on the second environmental information so that the area to be adjusted meets the environmental condition includes: The multivariate control strategy includes a hot water valve opening adjustment strategy, the actuator includes a hot water valve, and the adjustment action includes adjusting the opening of the hot water valve; Based on the return air temperature in the second environmental information and the temperature setting value corresponding to the environmental condition, a PID algorithm is used to determine the fourth opening of the hot water valve as a basis for adjusting the opening of the hot water valve, so that the area to be adjusted meets the environmental condition; Wherein, if the fourth opening value reaches the preset opening value, the working time of the hot water valve is monitored; If the working time reaches the preset working time, the fourth opening degree is dynamically reduced according to the first preset interval time and the first preset value corresponding to the environmental condition.

7. The constant temperature and humidity air conditioning system energy saving control method according to claim 6, characterized in that: After the step of dynamically reducing the fourth opening according to the first preset interval time and the first preset value corresponding to the environmental condition if the working time reaches the preset working time, the method further includes: The number of hot water valves reaching a preset opening value is counted, and if the number is reduced to a preset number corresponding to the environmental condition, the fourth opening is dynamically increased according to a second preset interval time and a second preset value corresponding to the environmental condition.

8. An air conditioning control device, characterized in that: The air conditioning control device comprises: An environmental sensor, wherein the environmental sensor includes an inner area sensor and an outer area sensor, wherein the inner sensor is used to collect environmental information within the area to be adjusted, and the outer sensor is used to collect environmental information outside the area to be adjusted; An actuator, the actuator being loaded with a control model and used to change environmental information through a natural medium, the natural medium comprising air; An energy efficiency control cabinet, wherein the energy efficiency control cabinet is connected to the environmental sensor to receive the environmental information collected by the environmental sensor, and is connected to the actuator to control the actuator to adjust the area to be adjusted to meet the corresponding environmental conditions according to the received environmental information, wherein the energy efficiency control cabinet is configured with a host computer program and control logic, and when the control logic is implemented, the steps of the constant temperature and humidity air-conditioning system energy-saving control method are executed as described in any one of claims 1 to 7.

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