House air conditioner control system combined with passive energy-saving mechanism

Abstract

The invention discloses a house air conditioner control system combined with a passive energy-saving mechanism, and particularly relates to the field of energy conservation and air conditioner control, which comprises an acquisition and analysis module, an over-limit air supply module, a fallback shutdown module, a dynamic heat release module and a coordination switching module, the collection and analysis module collects indoor temperature data at an indoor air outlet and underground air temperature and humidity data at an underground fresh air inlet, and combines the collected data with a historical temperature curve and a solar radiation change trend to generate a trend analysis result. Solving a prediction result of room temperature future overrun or falling based on a trend analysis result; according to the scheme, by introducing trend prediction and judgment logic and combining passive adjustment paths of underground air circulation, the phase change heat storage unit and the chimney effect, collaborative operation of feed-forward control and feedback correction is achieved in all the modules, and the problems of adjustment delay and energy consumption amplification caused by sensing delay and execution inertia are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy saving and air conditioning control, and more particularly, to a house air conditioning control system combined with passive energy saving mechanism. BACKGROUND

[0002] In the house air conditioning system combined with underground space air circulation, PCM heat storage wall and chimney effect, the existing control strategy mostly relies on the instant triggering of temperature threshold, that is, when the indoor detection point temperature reaches or is lower than a certain set value, the controller immediately executes the air valve switching or fresh air unit start-stop. However, this single logic relying on instantaneous reading ignores the time lag effect of temperature conduction and air flow in the building space: the temperature measured by the sensor often lags behind the actual feeling of the residential area, and the mechanical response of components such as air valve and fan and the heat absorption and release process of PCM heat storage unit also have non-negligible inertia.

[0003] As a result, the system frequently appears premature or delayed action near the threshold, which leads to imbalance of the connection between active unit and passive circulation: premature start-stop will interrupt the continuous effect of passive energy saving path, while delayed intervention will lead to indoor comfort fluctuation and force the system to compensate in a higher energy consumption way. Therefore, the mismatch of perception, execution and thermal process time scale causes serious regulation lag problem, which becomes a key bottleneck restricting the energy efficiency and stability of the air conditioning system. SUMMARY

[0004] In order to overcome the above-mentioned defects of the prior art, the embodiments of the present application provide a house air conditioning control system combined with passive energy saving mechanism, which realizes the cooperative operation of feedforward control and feedback correction in the over-limit air supply, fall-back shutdown, dynamic heat release and coordinated switching modules by introducing trend prediction and judgment logic in the collection and analysis module and combining the passive regulation path of underground air circulation, phase change heat storage unit and chimney effect, so as to solve the problems of regulation lag and energy consumption amplification caused by sensor lag and execution inertia in the background art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a house air conditioning control system combined with passive energy saving mechanism, comprising a collection and analysis module, an over-limit air supply module, a fall-back shutdown module, a dynamic heat release module and a coordinated switching module.

[0006] The collection and analysis module collects the indoor temperature data at the indoor exhaust port and the underground air temperature and humidity data at the underground fresh air inlet, generates trend analysis results by combining the collected data with historical temperature curve and solar radiation change trend, and solves the prediction results of future over-limit or fall-back of room temperature based on the trend analysis results;

[0007] The over-limit air supply module solves the determination information that the room temperature will exceed the limit based on the prediction result, generates the feedforward opening adjustment of the proportional air valve and the start-stop instruction of the basement fresh air unit, and forms the air circulation channel in which the low-temperature air in the basement enters the indoor space before the over-limit occurs and convects with the hot air in the upper layer;

[0008] The falling-back shutdown module solves the determination information that the room temperature will fall back based on the prediction result, generates the advance shutdown instruction of the active air supply unit and the control operation of switching the proportional air valve to the passive circulation state, and forms the air heat exchange path in which the underground air and the indoor air are under the action of natural pressure difference;

[0009] The dynamic heat release module generates the dynamic heat release time window adjustment scheme by collecting the phase change heat storage unit temperature probe data and identifying the state of the phase change heat storage unit approaching the phase change temperature, combining the identified state with the trend analysis result, releasing the accumulated heat of the phase change heat storage unit in the dynamic heat release time window, and completing the periodic reset process of the phase change heat storage unit;

[0010] The coordinated switching module generates the dynamic coordinated switching strategy between the active air supply unit and the passive circulation by comprehensively determining the signals of the prediction result and real-time feedback, and forms the stable control effect.

[0011] In a preferred embodiment, in the collection and analysis module, the indoor temperature data collected at the indoor exhaust port and the underground air temperature data and humidity data collected at the underground fresh air inlet are compared with the historical temperature curve hour by hour to form the basic comparison result of the indoor and underground spaces;

[0012] The solar radiation change trend is introduced into the basic comparison result, the solar radiation change trend is formed based on the solar radiation correction factor calculated from the solar radiation intensity and the sunshine duration, and the solar radiation correction factor is used to dynamically correct the basic comparison result to generate the trend analysis result;

[0013] The trend analysis result is input into the prediction determination model, the indoor temperature change rate is calculated based on the continuous sampling difference of the indoor temperature data in the prediction determination model, the underground air temperature gradient is calculated based on the difference value and time interval of the underground air temperature at adjacent sampling time, the indoor temperature change rate and the underground air temperature gradient are jointly compared, and the driving force of the room temperature change is determined combined with the underground air humidity data to identify whether the room temperature will exceed 26℃ or fall back to below 25℃ in the future time window;

[0014] When the condition is identified as the room temperature exceeding 26℃ in the future, the over-limit trend signal is solved; when the condition is identified as the room temperature falling back to below 25℃ in the future, the falling-back trend signal is solved; when the condition is not met, the passive circulation state of the underground air and the indoor air under the action of natural pressure difference is maintained, and the prediction result representing the system maintaining the default operation is output.

[0015] In a preferred embodiment, in the over-limit air supply module, the over-limit trend signal output by the collection and analysis module is received, and the over-limit trend signal is combined with the indoor temperature data to generate the feedforward opening degree adjustment amount of the proportional air valves FA1, FA3 and FA5, and to close the proportional air valves FA2 and FA4, while generating the start-stop control instruction of the underground fresh air unit;

[0016] The feedforward opening degree adjustment of the proportional air valves FA1, FA3 and FA5 and the start-stop instruction of the underground fresh air unit are executed, so that the underground low-temperature air is supplied into the room before the room temperature reaches 26°C, and a correction signal is generated by combining the real-time feedback of the indoor temperature data during the air supply process, and the correction signal is applied to the opening degree of the proportional air valves FA1, FA3 and FA5, to ensure that the indoor air flow rate meets the preset comfort condition;

[0017] After the underground low-temperature air enters the room, the indoor hot air is driven to move to the upper layer, and the hot air is discharged under the action of the exhaust fan, forming a convection channel between the underground low-temperature air and the upper hot air, and the convection channel is output as an air circulation channel.

[0018] In a preferred embodiment, in the backfall shutdown module, the backfall trend signal output by the collection and analysis module is received, and the backfall trend signal is combined with the indoor temperature data to generate the advance shutdown instruction of the active air supply unit, and the switching operation of closing the proportional air valves FA1, FA3 and FA5 and opening the proportional air valves FA2 and FA4 is generated;

[0019] At the same time of executing the advance shutdown instruction of the active air supply unit, the proportional air valves FA1, FA3 and FA5 are sequentially closed and the proportional air valves FA2 and FA4 are sequentially opened according to the switching operation, forming an initial air heat exchange path in which the underground air enters the room under the action of natural pressure difference;

[0020] The initial air heat exchange path is compared with the real-time feedback of the indoor temperature data, the heat exchange efficiency deviation value and the air flow rate deviation value are calculated, and the proportional adjustment amount, the integral adjustment amount and the differential adjustment amount are generated based on the deviation values.

[0021] In a preferred embodiment, in the backfall shutdown module, the proportional adjustment amount, the integral adjustment amount and the differential adjustment amount are combined by weighting to form a feedback adjustment signal, and the feedback adjustment signal is applied to the opening degree of the proportional air valves FA2 and FA4;

[0022] When the heat exchange efficiency deviation value and the air flow rate deviation value both satisfy the preset stability condition, output the stable air heat exchange path maintained by natural pressure difference and corrected by proportional air valve as the stable operation path under passive circulation.

[0023] When the heat exchange efficiency deviation value or the air flow rate deviation value does not satisfy the preset stability condition, maintain the continuous action of the feedback adjustment signal and dynamically update the proportional adjustment amount, the integral adjustment amount and the differential adjustment amount until the condition is satisfied, and then output the stable air heat exchange path.

[0024] In a preferred embodiment, in the dynamic heat release module, real-time monitoring data of the phase change heat storage unit temperature probe arranged in the underground fresh air channel heat exchange section is also collected, and it is determined whether the phase change heat storage unit temperature enters the phase change temperature interval of 23-27℃. If it does not enter the interval, the passive circulation of underground air and indoor air is maintained, and if it enters the interval, a heat release trigger signal is generated;

[0025] The heat release trigger signal is combined with the trend analysis result to construct an adjustment scheme for the dynamic heat release time window. Based on the default time period 01:00-04:00, the adjustment scheme corrects the start time and duration of heat release in combination with the change trend of solar radiation and the indoor heat load accumulation;

[0026] In the dynamic heat release time window, only proportional air valves FA2 and FA4 are opened and the remaining proportional air valves are closed, and at the same time, the roof solar exhaust fan and the chimney air duct are driven to form a forced exhaust path, so that the underground low-temperature air flows through the phase change heat storage unit to release the accumulated heat, and the temperature probe monitors the phase change heat storage unit temperature drop rate and air inlet and outlet temperature difference, and calculates the heat release per unit time;

[0027] During the heat release process, when the phase change heat storage unit temperature is greater than 27℃, the roof solar exhaust fan is maintained to run, and the feedback adjustment signal generated by the fall-back shutdown module is called, and the feedback adjustment signal is combined with the deviation value of the heat release per unit time to act on the opening degree of proportional air valves FA2 and FA4;

[0028] When the heat release per unit time satisfies the preset stability condition and the phase change heat storage unit temperature falls back to below 23℃, the periodically reset phase change heat storage unit state is completed.

[0029] In a preferred embodiment, in the coordination switching module, the prediction result output by the collection and analysis module is also combined with real-time feedback data to form a dual-determination signal containing the future room temperature change trend and the immediate execution deviation, the real-time feedback data at least including indoor temperature data, indoor temperature change rate, current opening degree of proportional air valves FA1 to FA5, and operation state of the underground fresh air unit and the roof solar exhaust fan.

[0030] The consistency and conflict determination is based on a double determination signal: when there is an over-limit trend signal, the indoor temperature change rate is greater than or equal to a preset rising rate threshold, and continuously meets a preset duration threshold, a coordinated determination result of active air supply priority is formed;

[0031] When there is a back-off trend signal, the indoor temperature change rate is less than or equal to a preset falling rate threshold, and continuously meets a preset duration threshold, a coordinated determination result of passive circulation priority is formed;

[0032] When there is no over-limit trend signal and back-off trend signal, the indoor temperature is in a temperature interval of 25 DEG C to 26 DEG C, and the proportional air valve opening degree fluctuation does not exceed a preset opening degree fluctuation threshold, a coordinated determination result of maintaining default operation is formed;

[0033] When the prediction result is opposite to the real-time feedback or the joint fluctuation amplitude of the temperature and the air valve opening degree exceeds a preset fluctuation amplitude threshold within a preset observation time window, a coordinated determination result of buffer execution is formed.

[0034] In a preferred embodiment, in the coordinated switching module, a dynamic coordinated switching strategy is further generated according to the coordinated determination result: for the determination result of active air supply priority, an active air supply trigger instruction is outputted, and the opening degree change rate of the proportional air valve FA1, the proportional air valve FA3, the proportional air valve FA5 and the operation duration of the underground fresh air unit are not less than a preset operation duration lower limit;

[0035] For the determination result of passive circulation priority, a passive circulation switching instruction is outputted, and the target opening degree range and the maintenance duration of the proportional air valve FA2 and the proportional air valve FA4 are not less than a preset maintenance duration lower limit;

[0036] For the determination result of maintaining default operation, the passive circulation state is maintained, and new active air supply instructions are prohibited; for the determination result of buffer execution, the current air valve opening degree and the unit operation state are kept unchanged within a preset buffer duration, and the issuance of the switching instruction is frozen;

[0037] After the buffer duration ends, the indoor temperature change rate and the room temperature fluctuation amplitude are checked: when the room temperature fluctuation is lower than a preset threshold and the change rate meets the stability condition, the freezing is released and the operation mode consistent with the prediction result is restored;

[0038] When the room temperature fluctuation is still higher than the preset threshold or the prediction and the feedback continue to conflict, a passive circulation maintaining instruction is outputted, and new switching is prohibited until the fluctuation amplitude is lower than the preset threshold for a preset period, and a final stable air heat exchange path is formed.

[0039] Technical effects and advantages of the present application:

[0040] 1、This scheme through to the indoor temperature data, underground air temperature and humidity and solar radiation trend analysis, advance to judge whether will overrun or fall back in the future, and adjust the air valve and fresh air unit before the results appear, so as to avoid the temperature signal lag caused by too early or too late action, and then reduce the problem of comfort fluctuation and energy consumption amplification caused by time lag;

[0041] 2、This scheme through to the underground low temperature air and indoor hot air convection, and dynamic adjustment of proportional air valve to manage air flow, enhance indoor air flow rate and heat exchange efficiency, ensure comfort and energy efficiency in parallel; And the intelligent control of air valve and fresh air unit also further improves the stability and efficiency of air flow;

[0042] 3、This scheme also through the use of passive cycle and natural pressure difference, reduces the use frequency of active unit, especially in the room temperature back to the passive cycle state by switching, so that the system can maintain the stability of indoor temperature without increasing energy consumption, and also through the use of solar driven roof exhaust fan and chimney effect to enhance air heat exchange efficiency, further reduce the energy consumption of air conditioning system;

[0043] 4、This scheme through monitoring the temperature of phase change heat storage unit and adjusting the heat release time window, releasing the stored heat in the default time period at night, and adjusting the heat release time and opportunity in combination with solar radiation and heat load, to ensure the stability of system heat release, reduce the indoor temperature fluctuation and energy waste caused by improper heat release opportunity;

[0044] 5、This scheme also through the comprehensive prediction results and real-time feedback signal, ensure the smooth connection between active air supply and passive cycle, realize the intelligent switching of different modes, avoid frequent and unnecessary adjustment, so that the system can adjust smoothly according to the demand in different time period. BRIEF DESCRIPTION OF DRAWINGS

[0045] Figure 1 The system module diagram of the present application. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0047] With reference to the drawings in the description Figure 1 An embodiment of the present application is a kind of house air conditioning control system combined with passive energy-saving mechanism, including acquisition and analysis module, overrun air supply module, fall back shutdown module, dynamic heat release module and coordination switching module.

[0048] The collection analysis module generates trend analysis results by combining the collected data with historical temperature curves and solar radiation trends, and solves the prediction results of future over-limit or falling of room temperature based on the trend analysis results;

[0049] The over-limit air supply module generates the feedforward opening adjustment of the proportional air valve and the start-stop instruction of the basement fresh air unit based on the prediction results of the determination information that the room temperature will soon be over-limit, forms the air circulation channel of the underground low-temperature air entering the indoor and convecting with the upper layer hot air before the over-limit occurs;

[0050] The falling shutdown module generates the advance shutdown instruction of the active air supply unit and the control operation of switching the proportional air valve to the passive circulation state based on the prediction results of the determination information that the room temperature will soon be falling, forms the air heat exchange path of the underground air and the indoor air under the action of natural pressure difference;

[0051] The dynamic heat release module generates the dynamic heat release time window adjustment scheme by collecting the phase change heat storage unit temperature probe data and identifying the state of the phase change heat storage unit approaching the phase change temperature, releases the accumulated heat of the phase change heat storage unit in the dynamic heat release time window, and completes the periodic reset process of the phase change heat storage unit;

[0052] The coordinated switching module generates the dynamic coordinated switching strategy between the active air supply unit and the passive circulation by comprehensively predicting the results and the real-time feedback statistical double determination signals, forms the stable control effect.

[0053] In the collection analysis module, the indoor temperature data collected at the indoor exhaust outlet and the underground air temperature data and humidity data collected at the underground fresh air inlet are compared with the historical temperature curves hour by hour to form the basic comparison results of the indoor and the underground;

[0054] The solar radiation trend is introduced into the basic comparison results, the solar radiation trend is formed based on the solar radiation correction factor calculated from the solar radiation intensity and the sunshine duration, and the basic comparison results are dynamically corrected by using the solar radiation correction factor to generate the trend analysis results;

[0055] input the trend analysis result into a prediction determination model, wherein the prediction determination model is used to determine the future change trend of the room temperature on the basis of the trend analysis result, the indoor temperature change rate is calculated on the basis of the continuous sampling difference of the indoor temperature data in the prediction determination model, the underground air temperature gradient is calculated on the basis of the difference value of the underground air temperature at adjacent sampling moments and the time interval, the indoor temperature change rate and the underground air temperature gradient are jointly compared, and the driving force of the room temperature change is determined in combination with the underground air humidity data to identify whether the room temperature will exceed 26℃ or fall below 25℃ in a future time window;

[0056] When the condition is identified as the future room temperature exceeding 26℃, an over-limit trend signal is solved; when the condition is identified as the future room temperature falling below 25℃, a falling trend signal is solved; and when the condition is not satisfied, the passive circulation state of the underground air and the indoor air under the action of the natural pressure difference is maintained, and a prediction result representing that the system maintains the default operation is output;

[0057] Wherein, the indoor temperature change rate is represented by the indoor temperature at the current sampling moment minus the indoor temperature at the last sampling moment, and then divided by the ratio of the time interval of the two samplings; the underground air temperature gradient is represented by the underground air temperature at the current sampling moment minus the underground air temperature at the last sampling moment, and then divided by the ratio of the time interval of the two samplings; the above two items are taken as main variables, and two types of correction factors are introduced: one is a humidity correction factor, which reflects the influence on the heat transfer efficiency by the deviation of the underground air humidity from the target humidity; the other is a solar radiation correction factor, which weights the indoor temperature increase trend by the change of the solar radiation intensity and the sunshine duration;

[0058] The prediction determination model takes the weighted sum of the indoor temperature change rate multiplied by the indoor weight, the underground air temperature gradient multiplied by the lower layer air weight, the humidity correction factor multiplied by the humidity weight, and the solar radiation correction factor multiplied by the radiation weight, as the driving force index; in a preset future time window, if the cumulative value of the driving force index is higher than the over-limit threshold, an over-limit trend signal is output; if it is lower than the falling threshold, a falling trend signal is output; and if it is between the two, a prediction result representing that the system maintains the default operation is output.

[0059] In the over-limit air supply module, the over-limit trend signal output by the receiving and collecting analysis module is received, and the over-limit trend signal is jointly calculated with the indoor temperature data to generate the feedforward opening degree adjustment amount of the proportional air valve FA1, the proportional air valve FA3 and the proportional air valve FA5, and to close the proportional air valve FA2 and the proportional air valve FA4, and to generate the start-stop control instruction of the underground fresh air handling unit at the same time;

[0060] The feedforward opening degree regulation of the proportional air valves FA1, FA3 and FA5 and the start-stop instruction of the underground fresh air unit are executed, so that the underground low-temperature air is sent into the room before the room temperature reaches 26℃, and a correction signal is generated by combining the real-time feedback of the indoor temperature data during the air supply process, which is used to adjust the opening degree of the proportional air valves FA1, FA3 and FA5, so as to ensure that the indoor air flow rate meets the preset comfort condition;

[0061] After the underground low-temperature air enters the room, the indoor hot air is driven to move to the upper layer, and the hot air is discharged under the action of the exhaust fan, forming a convection channel between the underground low-temperature air and the hot air in the upper layer;

[0062] The convection channel is taken as an air circulation channel output, which is called by the coordination switching module to realize the connection control with the subsequent fall-off shutdown module and the dynamic heat release module.

[0063] In the fall-off shutdown module, the fall-off trend signal output by the collection and analysis module is received, and the fall-off trend signal is jointly judged with the indoor temperature data to generate an early shutdown instruction of the active air supply unit, and a switching operation of closing the proportional air valves FA1, FA3 and FA5 and opening the proportional air valves FA2 and FA4 is performed;

[0064] At the same time of executing the early shutdown instruction of the active air supply unit, the proportional air valves FA1, FA3 and FA5 are sequentially closed and the proportional air valves FA2 and FA4 are sequentially opened according to the switching operation, forming an initial air heat exchange path in which the underground air enters the room under the action of natural pressure difference;

[0065] The initial air heat exchange path is compared with the real-time feedback of the indoor temperature data, the heat exchange efficiency deviation value and the air flow rate deviation value are calculated, and the proportional adjustment amount representing the instantaneous size of the deviation value at the current time, the integral adjustment amount representing the cumulative change of the deviation value in the continuous period, and the differential adjustment amount representing the change rate of the deviation value between adjacent time points are generated based on the deviation value.

[0066] In the fall-off shutdown module, the proportional adjustment amount, the integral adjustment amount and the differential adjustment amount are combined by weighting to form a feedback adjustment signal, which is used to adjust the opening degree of the proportional air valves FA2 and FA4;

[0067] When the heat exchange efficiency deviation value and the air flow rate deviation value both meet the preset stability condition, a stable air heat exchange path maintained by natural pressure difference and corrected by the proportional air valve is output as a stable operation path under passive circulation;

[0068] When the heat exchange efficiency deviation value or the air flow rate deviation value does not satisfy the preset stability condition, the continuous effect of the feedback adjustment signal is maintained, and the proportional adjustment amount, the integral adjustment amount and the differential adjustment amount are dynamically updated until the condition is satisfied, and then the stable air heat exchange path is output for calling by the coordination switching module;

[0069] Wherein, first define the target heat exchange efficiency given by the experience calibration under the passive circulation condition and the target air flow rate given by the comfort requirement, the real-time heat exchange efficiency deviation value is the real-time heat exchange efficiency minus the target heat exchange efficiency, and the air flow rate deviation value is the real-time air flow rate minus the target air flow rate;

[0070] The proportional adjustment amount is equal to the proportional weight multiplied by the instantaneous value of the deviation value at the current time; the integral adjustment amount is equal to the integral weight multiplied by the cumulative sum of the deviation value in the last continuous time length; and the differential adjustment amount is equal to the differential weight multiplied by the ratio of the change amount of the deviation value to the time interval between adjacent time points;

[0071] The three adjustment amounts are weighted and summed to form a feedback adjustment signal; the signal is converted into the opening correction amount of the proportional air valve FA2 and the proportional air valve FA4, and is superimposed on the current opening until the absolute value of the deviation does not exceed the stability threshold and the duration reaches the stability time length threshold, at which time the stable air heat exchange path under the passive circulation is output, if any condition is not satisfied, the continuous effect of the feedback adjustment signal is maintained, and small amplitude update is carried out according to the online setting strategy of the proportional weight, the integral weight and the differential weight, to avoid opening shock and over-regulation.

[0072] In the dynamic heat release module, real-time monitoring data of a phase change heat storage unit temperature probe arranged in the underground fresh air channel heat exchange section is collected, and it is determined whether the phase change heat storage unit temperature enters the phase change temperature interval of 23-27℃, and the passive circulation of underground air and indoor air is maintained when it does not enter the interval, and a heat release trigger signal is generated when it enters the interval, wherein the phase change heat storage unit is an energy storage component that can undergo solid-liquid phase change at a specific temperature interval and is accompanied by latent heat absorption and release, and its material can be gypsum-based phase change plate, paraffin-based compound or salt water type energy storage medium;

[0073] The heat release trigger signal is combined with the trend analysis result to construct an adjustment scheme of the dynamic heat release time window, which adjusts the start time and duration of the heat release time based on the default time period 01:00-04:00, combined with the change trend of solar radiation and the indoor heat load accumulation;

[0074] During the dynamic heat release time window, only the proportional air valve FA2 and the proportional air valve FA4 are opened and the remaining proportional air valves are closed, while the roof solar exhaust fan is driven to form a forced exhaust path with the chimney duct, so that the underground low-temperature air flows through the phase change heat storage unit to release the accumulated heat, and the temperature probe is used to monitor the temperature drop rate of the phase change heat storage unit and the temperature difference between the air inlet and outlet, so as to calculate the heat release per unit time; wherein the electricity required for the operation of the roof solar exhaust fan is provided by the daytime solar power generation storage, and the default priority time period of the dynamic heat release time window is 01:00 to 04:00 at night; the roof solar exhaust fan is installed at the ventilation outlet of the building roof and connected with the upper end of the chimney duct, which is used to provide additional exhaust power under the action of solar radiation; the chimney duct extends from the underground fresh air channel or the indoor exhaust port to the roof, and the lower end thereof is in communication with the heat exchange section of the phase change heat storage unit or the underground fresh air channel, and the upper end thereof is connected with the roof solar exhaust fan; through the above arrangement, the circulation heat exchange and dissipation effect between the underground low-temperature air and the indoor hot air can be enhanced under the driving of solar energy during the day and under the action of chimney thermal pressure at night;

[0075] During the heat release process, when the temperature of the phase change heat storage unit is greater than 27℃, the roof solar exhaust fan is maintained to operate, and a feedback adjustment signal generated by a falling stop module is called to jointly compare the feedback adjustment signal with the deviation value of the heat release per unit time, and the feedback adjustment signal is applied to the opening degree of the proportional air valve FA2 and the proportional air valve FA4.

[0076] When the heat release per unit time meets the preset stability condition and the temperature of the phase change heat storage unit falls to below 23℃, the state of the periodically reset phase change heat storage unit is completed as the operation result of the dynamic heat release module.

[0077] In the coordination switching module, the prediction result output by the acquisition and analysis module is also jointly counted with real-time feedback data, and the real-time feedback data at least includes indoor temperature data, indoor temperature change rate, current opening degree of the proportional air valve FA1 to the proportional air valve FA5, operation state of the underground fresh air unit and the roof solar exhaust fan, to form a double judgment signal containing future room temperature change trend and immediate execution deviation;

[0078] Based on the double judgment signal, consistency and conflict judgment is carried out: when there is an over-limit trend signal and the indoor temperature change rate is greater than or equal to the preset rising rate threshold and continuously meets the preset duration threshold, a coordination judgment result of active air supply priority is formed;

[0079] When there is a falling trend signal and the indoor temperature change rate is less than or equal to the preset falling rate threshold and continuously meets the preset duration threshold, a coordination judgment result of passive circulation priority is formed;

[0080] When there is no over-limit trend signal and back-off trend signal, the indoor temperature is located in the temperature interval of 25-26℃, and the proportional air valve opening fluctuation does not exceed the preset opening fluctuation threshold, a coordinated decision result of maintaining default operation is formed;

[0081] When the prediction result is opposite to the real-time feedback or the joint fluctuation amplitude of temperature and air valve opening exceeds the preset fluctuation amplitude threshold within the preset observation time window, a coordinated decision result of buffer execution is formed;

[0082] It should be noted that for the formula structure involved in the present scheme, the dimensionless term can be used as a proportional or structural adjustment factor. When combined with quantities with units, it only plays a numerical scaling role and does not introduce a new physical dimension, so it will not change or confuse the unit system of the whole expression; Such combination of "dimensionless term and quantity unit term" can be understood as a composite structure expression commonly used in mathematical and physical modeling, which conforms to the principle of dimensional consistency and has a clear physical interpretation basis;

[0083] Secondly, in the formula structure of the present scheme, if it involves multiple variable terms with different physical units, including but not limited to time, mass or energy variables, their joint occurrence is to express the cooperative modeling relationship of multiple physical mechanisms. Each variable can be mapped by a function, combined by a ratio, or adjusted by a normalization to form a unified structure. The unit is clear and the meaning is clear. The whole expression conforms to the principle of dimensional consistency and the common norm of engineering modeling;

[0084] In the present scheme, constants, weights, adjustment factors, threshold parameters, and proportional coefficients are all adjustable control parameters for different application environments. Their values depend on the target device configuration, data input characteristics, and performance optimization goals. In the implementation phase, they are set within a reasonable range through model verification, performance constraints, or engineering calibration. Although these parameters do not have a unique value, they have a clear adjustment logic and calculation path, and belong to the deterministic setting process in engineering implementation. The purpose of such setting is to ensure that the scheme has both general adaptability and reproducibility and operability, without affecting its technical clarity and implementability;

[0085] Q is defined as 放热 The heat dissipation per unit time represents the heat carried away by the air flowing through the phase change heat storage unit.

[0086] Q 放热 = m 空气 · c 空气 · ΔT 空气

[0087]

[0088] ΔT 空气 = T 入口 -T出口

[0089] P 调节 = K 比例 ·(Q 放热 - Q 目标 )

[0090]

[0091] ΔQ 调节 = P 调节 + I 调节 + D 调节

[0092]

[0093] Time adjusted = Time default + f(SR trend , HL accumulated )

[0094] wherein Q 放热 is the heat release amount per unit time; m 空气 is the air mass flow rate flowing through the phase change heat storage unit; c 空气 is the specific heat capacity of air, c 空气 denotes the heat required for 1℃ rise per unit mass of air; ΔT 空气 is the temperature difference between the inlet and outlet of air; is the air flow rate; ρ 空气 is the density of air; T 入口 is the temperature of air entering the phase change heat storage unit; T 出口 is the temperature of air leaving the phase change heat storage unit;

[0095] wherein Q 放热 is the heat release amount currently calculated; Q 目标 is the preset target heat release amount; K 比例 is the proportional adjustment coefficient, K 比例 is used to reflect the response sensitivity of the heat release amount deviation; I 调节 is the integral adjustment amount; K 积分 is the integral adjustment coefficient, which is used to control the cumulative effect of the deviation; D 调节 is the differential adjustment amount; K 微分 is the differential adjustment coefficient, which is used to reflect the response sensitivity of the deviation change; ΔQ 调节 is the feedback adjustment signal, which is the weighted combination result of the proportional, integral, and differential adjustment;

[0096] wherein SR trend is the solar radiation intensity change rate; HL accumulatedThe cumulative amount of indoor heat load; Time adjusted To dynamically adjust the heat release time window, the adjusted heat release time is corrected based on solar radiation trends and accumulated heat load. default This is the default time period, which is 00:00-04:00.

[0097] Furthermore, this scheme calculates the air mass flow rate m through the phase change thermal storage unit. 空气 Specific heat capacity of air c 空气 Temperature difference ΔT between air inlet and outlet 空气 The amount of heat released per unit time, Q, can be obtained. 放热 This is used to quantify the heat carried away by the air and to provide a basis for subsequent damper adjustments; then, during the heat release process, the system needs to adjust the dampers to maintain a stable heat release, based on the current heat release Q. 放热 With the preset target heat release Q 目标 The deviation is used to generate a feedback control signal, which includes the proportional control amount P. 调节 Integral adjustment quantity I 调节 and differential adjustment quantity D 调节 The final adjustment signal ΔQ is generated through weighted combination. 调节 This is to ensure that the opening of the air valve can be precisely adjusted to maintain a stable and efficient heat release process.

[0098] Finally, based on the trend of solar radiation change SR trend and indoor heat load accumulation HL accumulated Dynamically adjust the heat release time window. adjusted This adjustment ensures that the heat release process is not affected by external changes, releases the stored heat at the optimal time, improves the system's energy efficiency, quantifies and regulates the heat release process, optimizes airflow and heat distribution, and ultimately achieves a balance between energy saving and comfort.

[0099] The coordination switching module also includes generating a dynamic coordination switching strategy based on the coordination judgment result: for the judgment result of prioritizing active air supply, an active air supply trigger command is output and the opening change rate of proportional air valves FA1, FA3, and FA5 is limited to not being lower than the preset lower limit of the operating time of the underground fresh air unit.

[0100] For the determination result of passive cycle priority, output passive cycle switching command and set the target opening range and maintenance time of proportional air valve FA2 and proportional air valve FA4 to be no less than the preset maintenance time lower limit.

[0101] For the judgment result of maintaining the default operation, the passive circulation state is kept and new active air supply instructions are prohibited; for the judgment result of buffer execution, the current air valve opening degree and unit operation state are kept unchanged within the preset buffer duration, and the switching instruction is frozen;

[0102] After the buffer duration ends, the indoor temperature change rate and the indoor temperature fluctuation amplitude are checked: when the indoor temperature fluctuation is below the preset threshold and the change rate meets the stability condition, the freezing is released and the operation mode consistent with the prediction result is restored;

[0103] When the indoor temperature fluctuation is still higher than the preset threshold or the prediction and feedback continue to conflict, the instruction to maintain passive circulation is output and new switching is prohibited until the fluctuation amplitude is below the preset threshold for a preset period of time, forming the final stable air heat exchange path;

[0104] Wherein, the prediction result is converted into a prediction trend factor, wherein the over-limit trend takes a positive amplitude, the back-off trend takes a negative amplitude, and the no trend takes an amplitude close to zero; the real-time feedback is converted into a feedback deviation factor, which is jointly represented by the absolute value of the indoor temperature change rate and the air valve opening degree fluctuation amplitude, and the larger the amplitude, the more unstable it is. A coordination score is constructed, which is the weighted sum of the prediction trend factor multiplied by the prediction weight and the feedback deviation factor multiplied by the feedback weight; when the coordination score is higher than the active threshold, the coordination judgment result of active air supply priority is output; when the coordination score is lower than the passive threshold, the coordination judgment result of passive circulation priority is output; when the coordination score is between the two thresholds and the temperature and opening degree fluctuation are both not more than the respective fluctuation threshold, the coordination judgment result of maintaining the default operation is output; if the number of positive and negative reversals of the coordination score within the observation time window is higher than the switching frequency threshold or the combined fluctuation amplitude exceeds the combined fluctuation threshold, the coordination judgment result of buffer execution is output, and the current opening degree and unit state are frozen, and the issuance of new switching instructions is suspended for a short buffer process; after the buffer ends, the operation mode consistent with the prediction is restored according to whether the indoor temperature fluctuation amplitude and change rate fall within the threshold, and if not, it is rolled back to passive circulation priority until the fluctuation is controlled, ensuring smooth connection of active and passive at different time scales and avoiding regulation lag and energy consumption amplification.

[0105] The present scheme connects the links of prediction, advance adjustment, feedback correction, passive priority and active supplement into a complete link, so that the system first judges whether the room temperature will rise or fall through data collection and trend prediction; then decides whether to send cold air in advance or stop the machine to maintain natural circulation; at the same time, it also combines underground air and phase change heat storage unit to utilize the day and night temperature difference and solar exhaust fan as much as possible, uses passive mode as much as possible, and combines energy saving and comfort.

[0106] In specific implementation, the collection analysis module mainly collects the temperature and humidity data of the indoor exhaust outlet and the underground fresh air inlet, and obtains the trend of future room temperature in combination with the solar radiation and historical curve; the over-limit air supply module opens the underground fresh air unit and the corresponding air valve in advance to send low-temperature air into the room before predicting that the temperature may exceed the standard, so as to avoid the temperature exceeding the threshold; the back-fall shutdown module makes the active air supply unit shut down in advance and switches to passive circulation when predicting that the temperature falls back, and ensures that the air flow and heat exchange remain in a stable range through the proportional, integral and differential adjustment methods; the dynamic heat release module releases the heat absorbed during the day at the appropriate time at night through the phase change heat storage unit installed in the heat exchange section of the underground fresh air channel, and uses the roof solar exhaust fan and the chimney air duct to help exhaust the hot air; and the coordination switching module is responsible for comprehensive prediction and real-time feedback, so that different operating states can be smoothly switched, and over-switching or energy consumption increase is avoided, thereby solving the core problems of traditional air conditioning systems, such as insufficient prediction, lagging adjustment and high energy consumption, and realizing stable, energy-saving and comfortable indoor environment control.

[0107] Finally: the above only describes the preferred embodiments of the present application and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A house air conditioning control system incorporating passive energy saving mechanism, characterized in that, The system comprises a collection and analysis module, an over-limit air supply module, a back-fall shutdown module, a dynamic heat release module, and a coordinated switching module. The collection and analysis module collects indoor temperature data at an indoor exhaust outlet and underground air temperature and humidity data at an underground fresh air inlet, combines the collected data with historical temperature curves and solar radiation variation trends to generate trend analysis results, and solves prediction results of future over-limit or back-fall of the room temperature based on the trend analysis results. The over-limit air supply module solves determination information that the room temperature will soon be over-limit based on the prediction results, generates a feed-forward opening adjustment of a proportional air valve and an on-off instruction of an underground air handling unit, forms an air circulation channel in which underground low-temperature air enters the room before over-limit occurs and convects with upper-layer hot air. The back-fall shutdown module solves determination information that the room temperature will soon be back-fall based on the prediction results, generates an advance shutdown instruction of an active air supply unit and a control operation of switching the proportional air valve to a passive circulation state, and forms an air heat exchange path in which underground air and indoor air are under the action of natural pressure difference. The dynamic heat release module collects phase change heat storage unit temperature probe data and identifies a state in which the phase change heat storage unit approaches a phase change temperature, combines the identified state with the trend analysis results to generate a dynamic heat release time window adjustment scheme, releases accumulated heat of the phase change heat storage unit in the dynamic heat release time window, and completes a periodic reset process of the phase change heat storage unit. The coordinated switching module generates a dynamic coordinated switching strategy between the active air supply unit and the passive circulation based on the prediction results and real-time feedback statistical double-determination signals, and forms a stable control effect.

2. The house air conditioning control system incorporating passive energy saving mechanism according to claim 1, wherein: In the collection and analysis module, the indoor temperature data collected at the indoor exhaust outlet and the underground air temperature data and humidity data collected at the underground fresh air inlet are compared with historical temperature curves hour by hour to form basic comparison results of the indoor and the underground. The solar radiation variation trend is introduced into the basic comparison results, the solar radiation variation trend is formed based on a solar radiation correction factor calculated from solar radiation intensity and sunshine duration, and the basic comparison results are dynamically corrected by using the solar radiation correction factor to generate trend analysis results. The trend analysis results are input into a prediction determination model, the indoor temperature variation rate is calculated based on continuous sampling difference of the indoor temperature data in the prediction determination model, the underground air temperature gradient is calculated based on the difference value and time interval of the underground air temperature at adjacent sampling moments, the indoor temperature variation rate and the underground air temperature gradient are compared, and the driving force of the room temperature variation is determined based on the underground air humidity data to identify whether the room temperature will exceed 26℃ or fall below 25℃ in a future time window. When the condition is identified as the room temperature exceeding 26℃ in the future, an over-limit trend signal is solved; when the condition is identified as the room temperature falling below 25℃ in the future, a back-fall trend signal is solved; and when the condition is not satisfied, a passive circulation state of the underground air and the indoor air under the action of natural pressure difference is maintained, and a prediction result representing that the system maintains default operation is output.

3. The house air conditioning control system incorporating passive energy saving mechanism as claimed in claim 2 wherein: In the over-limit air supply module, the over-limit trend signal output by the collection and analysis module is received, and the over-limit trend signal is combined with the indoor temperature data to generate the feedforward opening degree adjustment amount of the proportional air valves FA1, FA3 and FA5, and to close the proportional air valves FA2 and FA4, and to generate the start-stop control instruction of the underground fresh air unit; The feedforward opening degree adjustment of the proportional air valves FA1, FA3 and FA5 and the start-stop instruction of the underground fresh air unit are executed, so that the underground low-temperature air is supplied into the room before the room temperature reaches 26℃, and a correction signal is generated by combining the real-time feedback of the indoor temperature data during the air supply process, and the correction signal is applied to the opening degree of the proportional air valves FA1, FA3 and FA5, to ensure that the indoor air flow rate meets the preset comfort condition; After the underground low-temperature air enters the room, the indoor hot air is driven to move to the upper layer, and the hot air is discharged under the action of the exhaust fan, forming a convection channel between the underground low-temperature air and the upper hot air, and the convection channel is output as an air circulation channel.

4. The house air conditioning control system incorporating passive energy saving mechanism according to claim 3, wherein: In the back-fall shutdown module, the back-fall trend signal output by the collection and analysis module is received, and the back-fall trend signal is combined with the indoor temperature data to generate the advance shutdown instruction of the active air supply unit, and to generate the switching operation of closing the proportional air valves FA1, FA3 and FA5 and opening the proportional air valves FA2 and FA4; At the same time of executing the advance shutdown instruction of the active air supply unit, the proportional air valves FA1, FA3 and FA5 are sequentially closed and the proportional air valves FA2 and FA4 are sequentially opened according to the switching operation, forming an initial air heat exchange path in which the underground air enters the room under the action of natural pressure difference; The initial air heat exchange path is compared with the real-time feedback of the indoor temperature data, the heat exchange efficiency deviation value and the air flow rate deviation value are calculated, and the proportional adjustment amount, the integral adjustment amount and the differential adjustment amount are generated based on the deviation values.

5. The house air conditioning control system incorporating passive energy saving mechanism according to claim 4, wherein: In the back-fall shutdown module, the proportional adjustment amount, the integral adjustment amount and the differential adjustment amount are combined by weighting to form a feedback adjustment signal, and the feedback adjustment signal is applied to the opening degree of the proportional air valves FA2 and FA4; When the heat exchange efficiency deviation value and the air flow rate deviation value both meet the preset stability condition, a stable air heat exchange path maintained by natural pressure difference and corrected by the proportional air valves is output as a stable operation path under passive circulation; When the heat exchange efficiency deviation value or the air flow rate deviation value does not meet the preset stability condition, the continuous action of the feedback adjustment signal is maintained and the proportional adjustment amount, the integral adjustment amount and the differential adjustment amount are dynamically updated until the condition is met, and then the stable air heat exchange path is output.

6. The house air conditioning control system incorporating passive energy saving mechanism according to claim 5, wherein: In the dynamic heat release module, real-time monitoring data of a phase change heat storage unit temperature probe arranged in the underground fresh air channel heat exchange section is collected, and it is determined whether the phase change heat storage unit temperature enters the phase change temperature interval of 23℃ to 27℃, and if not, the passive circulation of the underground air and the indoor air is maintained, and if yes, a heat release trigger signal is generated; The exothermic trigger signal is combined with the trend analysis result to construct an adjustment scheme of a dynamic exothermic time window. On the basis of the default time period 01:00-04:00, the adjustment scheme combines the solar radiation change trend and the indoor heat load accumulation to correct the starting time and the duration of the exothermic time; In the dynamic exothermic time window, only the proportional air valve FA2 and the proportional air valve FA4 are opened, and the remaining proportional air valves are closed. Meanwhile, the roof solar exhaust fan and the chimney air duct form a forced exhaust path, so that the underground low-temperature air flows through the phase change heat storage unit to release the accumulated heat. The temperature probe monitors the temperature drop rate of the phase change heat storage unit and the temperature difference between the air inlet and outlet, and calculates the exothermic quantity per unit time; During the exothermic process, when the temperature of the phase change heat storage unit is greater than 27℃, the roof solar exhaust fan is maintained to run, and the feedback adjustment signal generated by the falling stop module is called to compare the deviation value of the exothermic quantity per unit time, and the opening degree of the proportional air valve FA2 and FA4 is adjusted; When the exothermic quantity per unit time meets the preset stability condition and the temperature of the phase change heat storage unit falls to below 23℃, the state of the periodically reset phase change heat storage unit is completed.

7. The house air conditioning control system incorporating passive energy saving mechanism according to claim 6, wherein: In the coordination switching module, the prediction result output by the acquisition and analysis module is combined with the real-time feedback data to form a double judgment signal containing the future room temperature change trend and the immediate execution deviation. The real-time feedback data at least includes indoor temperature data, indoor temperature change rate, current opening degree of proportional air valve FA1 to proportional air valve FA5, and running state of the underground fresh air handling unit and the roof solar exhaust fan; Based on the double judgment signal, consistency and conflict judgment is carried out: when there is an over-limit trend signal and the indoor temperature change rate is greater than or equal to the preset rising rate threshold and continuously meets the preset duration threshold, the active air supply priority coordination judgment result is formed; When there is a falling trend signal and the indoor temperature change rate is less than or equal to the preset falling rate threshold and continuously meets the preset duration threshold, the passive circulation priority coordination judgment result is formed; When there is no over-limit trend signal and falling trend signal, and the indoor temperature is in the temperature interval of 25℃ to 26℃, and the proportional air valve opening degree fluctuation does not exceed the preset opening degree fluctuation threshold, the coordination judgment result of maintaining the default operation is formed; When the prediction result is opposite to the real-time feedback or the joint fluctuation amplitude of temperature and air valve opening degree exceeds the preset fluctuation amplitude threshold within the preset observation time window, the coordination judgment result of buffer execution is formed.

8. The house air conditioning control system incorporating passive energy saving mechanism according to claim 7, wherein: In the coordination switching module, a dynamic coordination switching strategy is generated according to the coordination judgment result: for the active air supply priority judgment result, the active air supply trigger instruction is output, and the opening degree change rate of the proportional air valve FA1, the proportional air valve FA3 and the proportional air valve FA5 and the running time of the underground fresh air handling unit are not less than the preset running time lower limit; For the passive circulation priority judgment result, the passive circulation switching instruction is output, and the target opening degree range and the maintenance time of the proportional air valve FA2 and the proportional air valve FA4 are set to be not less than the preset maintenance time lower limit; For the determination result of maintaining the default operation, the passive circulation state is kept and new active air supply instructions are prohibited; for the determination result of buffer execution, the current air valve opening degree and unit operation state are kept unchanged within the preset buffer duration, and the issuance of switching instructions is frozen; After the buffer duration ends, the indoor temperature change rate and the indoor temperature fluctuation amplitude are checked: when the indoor temperature fluctuation is lower than the preset threshold and the change rate meets the stability condition, the freeze is released and the operation mode consistent with the prediction result is restored; When the indoor temperature fluctuation is still higher than the preset threshold or the prediction and the feedback continue to conflict, the instruction of maintaining the passive circulation is output and new switching is prohibited until the fluctuation amplitude is lower than the preset threshold for a preset period, forming the final stable air heat exchange path.

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