Control method and device of a radiant air conditioning system and radiant air conditioning system

Abstract

The present disclosure provides a control method and device of a radiant air conditioning system and the radiant air conditioning system, and relates to the field of air conditioning. The method comprises: predicting a load prediction value at a future predetermined time based on a load prediction required data set; inputting the load prediction value and a set temperature into a thermal inertia simulation model to obtain a simulation result, wherein the simulation result comprises a parameter change value of the radiant air conditioning system and a response time required for corresponding control indoor temperature to meet the set temperature; and controlling an operation parameter of the radiant air conditioning system based on an operation mode of the radiant air conditioning system, the load prediction value and the simulation result, wherein the operation mode comprises a heating mode or a cooling mode. The present disclosure can effectively reduce the floor thermal inertia problem, reduce the problem of untimely load supply and low indoor comfort caused by thermal inertia, and reduce the waste of system cold and heat sources.

Description

Technical Field

[0001] This disclosure relates to the field of air conditioning, and more particularly to a control method, apparatus and radiant air conditioning system for a radiant air conditioning system. Background Technology

[0002] As people's living standards improve, they have higher demands for indoor building thermal environment and comfort. Traditional air conditioning systems are prone to causing building syndrome and spreading bacteria. Floor radiant air conditioning systems offer superior comfort, are noiseless, and provide uniform temperature distribution, effectively avoiding these problems. However, related technologies cannot effectively solve the problem of thermal inertia in floors. Summary of the Invention

[0003] One technical problem this disclosure aims to solve is to provide a control method, apparatus, and system for a radiant air conditioning system that can effectively address the thermal inertia problem of radiant panels.

[0004] According to one aspect of this disclosure, a control method for a radiant air conditioning system is proposed, comprising: acquiring a dataset required for load forecasting; forecasting a load value for a predetermined time in the future based on the dataset required for load forecasting; inputting the load forecast value and a set temperature into a thermal inertia simulation model to obtain simulation results, wherein the simulation results include parameter changes of the radiant air conditioning system and the corresponding response time required for the controlled indoor temperature to meet the set temperature; and controlling the operating parameters of the radiant air conditioning system based on the operating mode of the radiant air conditioning system, the load forecast value, and the simulation results, wherein the operating mode includes a heating mode or a cooling mode.

[0005] In some embodiments, a corresponding temperature difference range is determined based on the difference between the indoor temperature and the set temperature in the operating mode. The operating parameters of the radiant air conditioning system are controlled based on the operating mode of the radiant air conditioning system, the load forecast value, and the simulation results. This includes controlling the operating parameters of the radiant air conditioning system according to the control strategy corresponding to the temperature difference range in the operating mode, the load forecast value, and the simulation results.

[0006] In some embodiments, when the radiant air conditioning system is in heating mode, the parameter change value includes at least one of the water temperature change value and the water flow rate change value, and the operating parameters include at least one of the water temperature parameter and the water flow rate parameter of the pipeline. Controlling the operating parameters of the radiant air conditioning system includes: determining whether to adjust at least one of the water temperature parameter and the water flow rate parameter of the radiant air conditioning system in advance based on the control strategy corresponding to the temperature difference range in the heating mode, the load prediction value, and the simulation results.

[0007] In some embodiments, the temperature difference range includes a first range, a second range, a third range, a fourth range, and a fifth range. The lower limit of the temperature in the first range is greater than the upper limit of the temperature in the second range, the lower limit of the temperature in the second range is greater than the upper limit of the temperature in the third range, the lower limit of the temperature in the third range is greater than the upper limit of the temperature in the fourth range, the lower limit of the temperature in the fourth range is greater than the upper limit of the temperature in the fifth range, and the set temperature is within the third range.

[0008] In some embodiments, determining whether to adjust at least one of the water temperature parameter and water flow rate parameter of the radiant air conditioning system in advance includes: when the difference between the indoor temperature and the set temperature is within a first range, reducing the water temperature parameter in advance or reducing the water flow rate parameter in advance based on the load forecast value and the response time in the simulation results.

[0009] In some embodiments, reducing the water temperature parameter or the water flow parameter in advance based on the load forecast value and the response time in the simulation results includes: when it is determined from the load forecast value that an increase in heat load is required, controlling the water temperature parameter to decrease the first water temperature according to the first response time corresponding to the first water temperature change value, and controlling the water flow parameter to decrease the first water flow rate according to the second response time corresponding to the first water flow rate change value, and controlling the water flow parameter to decrease the second water flow rate according to the second response time corresponding to the first water flow rate change value, and controlling the water flow parameter to decrease the second water temperature according to the third response time corresponding to the second water temperature change value, and controlling the water flow parameter to decrease the second water flow rate according to the fourth response time corresponding to the second water flow rate ...

[0010] In some embodiments, determining whether to adjust at least one of the water temperature parameter and water flow rate parameter of the radiant air conditioning system in advance further includes: if the difference between the indoor temperature and the set temperature is in a second range, and it is determined based on the load forecast value that no additional heat load is required, then reducing the water temperature parameter or reducing the water flow rate parameter in advance based on the response time in the simulation results; and if it is determined based on the load forecast value that an additional heat load is required, then maintaining the operating parameters of the radiant air conditioning system.

[0011] In some embodiments, reducing the water temperature parameter or the water flow parameter in advance based on the response time in the simulation results includes: controlling the water temperature parameter to reduce the third water temperature based on the fifth response time corresponding to the third water temperature change value, and controlling the water flow parameter to reduce the third water flow based on the sixth response time corresponding to the third water flow change value, and controlling the water flow parameter to reduce the third water flow rate in advance.

[0012] In some embodiments, determining whether to adjust at least one of the water temperature parameters and water flow parameters of the radiant air conditioning system in advance includes: maintaining the operating parameters of the radiant air conditioning system when the difference between the indoor temperature and the set temperature is in a third range.

[0013] In some embodiments, determining whether to adjust at least one of the water temperature parameter and water flow rate parameter of the radiant air conditioning system in advance includes: if the difference between the indoor temperature and the set temperature is in a fourth interval, and it is determined based on the load forecast value that an increase in heat load is required, then the water temperature parameter or the water flow rate parameter is increased in advance based on the response time in the simulation results; and if it is determined based on the load forecast value that no increase in heat load is required, then the operating parameters of the radiant air conditioning system are maintained.

[0014] In some embodiments, increasing the water temperature parameter or increasing the water flow rate parameter in advance based on the response time in the simulation results includes: controlling the water temperature parameter to increase the fourth water temperature at the seventh response time before a predetermined time in the future, based on the seventh response time corresponding to the fourth water temperature change value; or controlling the water flow rate parameter to increase the fourth water flow rate at the eighth response time before a predetermined time in the future, based on the eighth response time corresponding to the fourth water flow rate change value.

[0015] In some embodiments, determining whether to adjust at least one of the water temperature parameter and water flow rate parameter of the radiant air conditioning system in advance includes: when the difference between the indoor temperature and the set temperature is in the fifth interval, increasing the water temperature parameter or increasing the water flow rate parameter in advance based on the load forecast value and the response time in the simulation results.

[0016] In some embodiments, increasing the water temperature parameter or the water flow parameter in advance based on the load forecast value and the response time in the simulation results includes: when it is determined that an increase in heat load is needed based on the load forecast value, controlling the water temperature parameter to increase the ninth water temperature according to the ninth response time corresponding to the fifth water temperature change value, or controlling the water flow parameter to increase the fifth water flow according to the tenth response time corresponding to the fifth water flow change value, or controlling the water flow parameter to increase the fifth water flow according to the tenth response time corresponding to the fifth water flow change value, or controlling the water flow parameter to increase the sixth water flow according to the eleventh response time corresponding to the sixth water temperature change value, or controlling the water flow parameter to increase the sixth water flow according to the twelfth response time corresponding to the sixth water flow ... twelfth response time, or controlling the water flow parameter to increase the sixth water flow according to the twelfth response time corresponding to the twelfth response time, or controlling the water flow parameter to increase the sixth water flow according to the twelfth response time corresponding to the twelfth response time, or controlling the water flow parameter to increase the sixth water flow according to the twelfth response time, or controlling the water flow parameter to increase the

[0017] In some embodiments, the priority for adjusting the water temperature parameter or the water flow rate parameter is determined based on the outdoor temperature.

[0018] In some embodiments, when the radiant air conditioning system is in cooling mode, the parameter change value includes at least one of the water flow rate change value and the fan frequency change value, and the operating parameters include at least one of the fan frequency parameter and the water flow rate parameter of the pipeline. The control of the operating parameters of the radiant air conditioning system includes: determining whether to adjust at least one of the fan frequency parameter and the water flow rate parameter of the radiant air conditioning system in advance based on the control strategy corresponding to the temperature difference range in cooling mode, the load prediction value, and the simulation results.

[0019] In some embodiments, the temperature difference range includes a sixth range, a seventh range, an eighth range, a ninth range, and a tenth range. The lower limit of the temperature in the sixth range is greater than the upper limit of the temperature in the seventh range, the lower limit of the temperature in the seventh range is greater than the upper limit of the temperature in the eighth range, the lower limit of the temperature in the eighth range is greater than the upper limit of the temperature in the ninth range, the lower limit of the temperature in the ninth range is greater than the upper limit of the temperature in the tenth range, and the set temperature is within the eighth range.

[0020] In some embodiments, determining whether to adjust at least one of the fan frequency parameter and water flow parameter of the radiant air conditioning system in advance includes: when the difference between the indoor temperature and the set temperature is in the sixth interval, increasing the water flow parameter or increasing the fan frequency parameter in advance based on the load forecast value and the response time in the simulation results.

[0021] In some embodiments, increasing the water flow rate parameter or the fan frequency parameter in advance based on the load forecast value and the response time in the simulation results includes: when it is determined from the load forecast value that no additional cooling load is needed, controlling the water flow rate parameter to increase the seventh water flow rate at the thirteenth response time before a predetermined future time, based on the thirteenth response time corresponding to the seventh flow rate change value; and when it is determined from the load forecast value that an additional cooling load is needed, if the required additional cooling load is greater than a first threshold, controlling the water flow rate parameter to increase the eighth water flow rate at the fourteenth response time before a predetermined future time, based on the fourteenth response time corresponding to the eighth water flow rate change value; and if the required additional cooling load is less than or equal to the first threshold, controlling the fan frequency parameter to increase the first fan frequency at the fifteenth response time before a predetermined future time, based on the fifteenth response time corresponding to the first fan frequency change value.

[0022] In some embodiments, determining whether to adjust at least one of the fan frequency parameter and water flow parameter of the radiant air conditioning system in advance includes: if the difference between the indoor temperature and the set temperature is in the seventh interval, and if it is determined based on the load forecast value that an increase in cooling load is required, then increasing the water flow parameter or increasing the fan frequency parameter in advance based on the response time in the simulation results; and if it is determined based on the load forecast value that no increase in cooling load is required, then maintaining the operating parameters of the radiant air conditioning system.

[0023] In some embodiments, increasing the water flow rate parameter or the fan frequency parameter in advance based on the response time in the simulation results includes: if the required increase in cooling load is determined to be greater than the second threshold based on the load forecast value, then controlling the water flow rate parameter to increase the ninth water flow rate at the sixteenth response time corresponding to the ninth water flow rate change value, and controlling the fan frequency parameter to increase the second fan frequency at the seventeenth response time corresponding to the second fan frequency change value, based on the seventeenth response time corresponding to the second fan frequency change value, at the seventeenth response time, and controlling the fan frequency parameter to increase the second fan frequency, based on the seventeenth response time corresponding to the second fan frequency change value, at the seventeenth response time, and the seventeenth response time, before the future predetermined time.

[0024] In some embodiments, determining whether to adjust at least one of the fan frequency parameters and water flow parameters of the radiant air conditioning system in advance includes maintaining the operating parameters of the radiant air conditioning system when the difference between the indoor temperature and the set temperature is in the eighth interval.

[0025] In some embodiments, determining whether to adjust at least one of the fan frequency parameter and water flow parameter of the radiant air conditioning system in advance includes: if the difference between the indoor temperature and the set temperature is in the ninth interval, and if it is determined from the load forecast value that an increase in cooling load is required, then increasing the water flow parameter or increasing the fan frequency parameter in advance based on the response time in the simulation results; and if it is determined from the load forecast value that no increase in cooling load is required, then maintaining the operating parameters of the radiant air conditioning system.

[0026] In some embodiments, increasing the water flow rate parameter or the fan frequency parameter in advance based on the response time in the simulation results includes: if the required increase in cooling load is determined to be greater than the third threshold based on the load forecast value, then controlling the water flow rate parameter to increase the tenth water flow rate at the eighteenth response time corresponding to the tenth water flow rate change value at the eighteenth response time before a predetermined future time; and if the required increase in cooling load is determined to be less than or equal to the third threshold based on the load forecast value, then controlling the fan frequency parameter to increase the third fan frequency at the nineteenth response time corresponding to the third fan frequency change value at the nineteenth response time before a predetermined future time.

[0027] In some embodiments, determining whether to adjust at least one of the fan frequency parameter and water flow parameter of the radiant air conditioning system in advance includes: when the difference between the indoor temperature and the set temperature is in the tenth interval, reducing the water flow parameter or reducing the fan frequency parameter in advance based on the load forecast value and the response time in the simulation results.

[0028] In some embodiments, reducing the water flow parameter or the fan frequency parameter in advance based on the load forecast value and the response time in the simulation results includes: if it is determined from the load forecast value that no increase in cooling load is required, controlling the water flow parameter to reduce the eleventh water flow based on the twentieth response time corresponding to the eleventh water flow change value, and controlling the fan frequency parameter to reduce the fourth fan frequency based on the twenty-first response time corresponding to the fourth fan frequency change value, and controlling the fan frequency parameter to reduce the fifth fan frequency based on the twenty-second response time corresponding to the fifth fan frequency change value, and controlling the fan frequency parameter to reduce the fifth fan frequency based on the twenty-second response time corresponding to the fifth fan frequency change value, and if the required increase in cooling load is less than or equal to the fourth threshold, the fan frequency parameter to reduce the fifth fan frequency, and controlling the fan frequency parameter to reduce the fifth fan frequency, and controlling the fifth ...

[0029] In some embodiments, when the radiant air conditioning system is in heating mode, the indoor humidity is adjusted using the humidity control module of the fresh air system based on the difference between the indoor relative humidity and the indoor relative humidity set value.

[0030] In some embodiments, adjusting indoor humidity using a humidity control module based on the difference between indoor relative humidity and a set indoor relative humidity value includes: reducing indoor humidity when the difference between indoor relative humidity and a set indoor relative humidity value is greater than a first humidity threshold; and increasing indoor humidity when the difference between indoor relative humidity and a set indoor relative humidity value is less than the first humidity threshold.

[0031] In some embodiments, when the radiant air conditioning system is in cooling mode, the indoor humidity is adjusted using the humidity control module of the fresh air system based on the relationship between indoor relative humidity and indoor relative humidity setpoint, and the relationship between indoor air dew point temperature and dew point temperature setpoint.

[0032] In some embodiments, adjusting indoor humidity using a humidity control module based on the relationship between indoor relative humidity and indoor relative humidity setpoint, and the relationship between indoor air dew point temperature and dew point temperature setpoint, includes: reducing indoor humidity using a humidity control module when either indoor relative humidity is greater than the indoor relative humidity setpoint or indoor air dew point temperature is greater than the dew point temperature setpoint.

[0033] In some embodiments, when at least one of the water flow rate parameter and the fan frequency parameter is increased, the indoor humidity is adjusted using a humidity control module based on the relationship between indoor relative humidity and indoor relative humidity setpoint, and the relationship between indoor air dew point temperature and dew point temperature setpoint.

[0034] According to another aspect of this disclosure, a control device for a radiant air conditioning system is also proposed, comprising: a data acquisition module configured to acquire a dataset required for load forecasting; a forecasting module configured to forecast a load value for a predetermined future time based on the dataset required for load forecasting; a simulation module configured to input the load forecast value and a set temperature into a thermal inertia simulation model to obtain simulation results, wherein the simulation results include parameter changes of the radiant air conditioning system and the response time required for the controlled indoor temperature to meet the set temperature; and a control module configured to control the operating parameters of the radiant air conditioning system based on the operating mode of the radiant air conditioning system, the load forecast value, and the simulation results, wherein the operating mode includes a heating mode or a cooling mode.

[0035] In some embodiments, the calculation module is configured to determine the corresponding temperature difference range based on the difference between the indoor temperature and the set temperature in the operating mode. The control module is further configured to control the operating parameters of the radiant air conditioning system based on the control strategy corresponding to the temperature difference range in the operating mode, the load forecast value, and the simulation results.

[0036] According to another aspect of this disclosure, a control device for a radiant air conditioning system is also provided, comprising: a memory; and a processor coupled to the memory, the processor being configured to execute the control method for the radiant air conditioning system as described above based on instructions stored in the memory.

[0037] According to another aspect of this disclosure, a radiant air conditioning system is also provided, comprising: a control device for the aforementioned radiant air conditioning system.

[0038] According to another aspect of this disclosure, a computer-readable storage medium is also provided, on which computer program instructions are stored, which, when executed by a processor, implement the control method of the radiant air conditioning system described above.

[0039] Compared with related technologies, the embodiments disclosed herein can effectively reduce the problem of floor thermal inertia, reduce the problems of untimely load supply and low indoor comfort caused by thermal inertia, and reduce the waste of system cold and heat sources.

[0040] Other features and advantages of this disclosure will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0041] The accompanying drawings, which form part of this specification, illustrate embodiments of this disclosure and, together with the specification, serve to explain the principles of this disclosure.

[0042] This disclosure will become clearer with reference to the accompanying drawings and the following detailed description, wherein:

[0043] Figure 1This is a schematic flowchart illustrating some embodiments of the control method for the radiant air conditioning system disclosed herein;

[0044] Figure 2 The following are schematic flowcharts illustrating other embodiments of the control method for the radiant air conditioning system disclosed herein;

[0045] Figure 3 The following are schematic flowcharts illustrating other embodiments of the control method for the radiant air conditioning system disclosed herein;

[0046] Figure 4 This is a schematic diagram of the structure of some embodiments of the control device for the radiant air conditioning system disclosed herein;

[0047] Figure 5 This is a schematic diagram of the structure of some embodiments of the control device for the radiant air conditioning system disclosed herein;

[0048] Figure 6 This is a schematic diagram of the structure of some embodiments of the control device for the radiant air conditioning system disclosed herein. Detailed Implementation

[0049] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present disclosure.

[0050] At the same time, it should be understood that, for ease of description, the dimensions of the various parts shown in the accompanying drawings are not drawn according to actual scale.

[0051] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use.

[0052] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0053] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0054] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0055] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0056] Figure 1 This is a schematic flowchart illustrating some embodiments of the control method for the radiant air conditioning system disclosed herein. These embodiments are executed by a control device for the radiant air conditioning system, such as a controller. In some embodiments, the radiant air conditioning system is installed below ground level, i.e., a floor radiant air conditioning system; in other embodiments, the radiant air conditioning system is located on the roof.

[0057] In step 110, obtain the dataset required for load forecasting.

[0058] In some embodiments, a field group control system is used to collect the dataset required for load forecasting. This dataset includes, for example, outdoor dry-bulb temperature Toa, outdoor relative humidity RHTo, indoor dry-bulb temperature Tia, air dew point temperature Ti, indoor relative humidity RHi, indoor relative humidity setpoint RH0, cold and heat source supply water temperature Tg, cold and heat source return water temperature Th, floor surface temperature Td, room flow rate G, and meteorological data purchased from a meteorological bureau, holiday dates, building envelope parameters, etc. The meteorological data may be, for example, weather conditions (clear / cloudy). This weather conditions data may include parameters such as no wind, light wind, windy, strong wind, typhoon, sunny, cloudy, partly cloudy, light rain, heavy rain, light snow, heavy snow, etc. These parameters are converted into data types.

[0059] This group control system, for example, is a centralized control system that uses control cabinets and other devices to achieve on-site automatic control and data acquisition.

[0060] In this embodiment, by collecting datasets, it is convenient to predict load demand, water temperature, and the surface temperature of the upper and lower surfaces of the radiant panel for a future period of time. The radiant panel is, for example, a floor.

[0061] In step 120, based on the dataset required for load forecasting, the load forecast value for a future predetermined time is predicted.

[0062] In some embodiments, the collected dataset is preprocessed, for example, by filling in missing values, correcting erroneous values, changing the data format, or changing the file format, so that the processed data meets the model input requirements. The processed dataset is then input into the neural network model for training.

[0063] Based on historical training and testing sets, a neural network model is trained to output load predictions for future times. For example, a sample dataset is input into the neural network model, and the predicted values ​​output by the model are compared with the actual values. The comparison result is checked to see if it meets the requirements of the loss function used to build the model. This process is iterated repeatedly, optimizing and adjusting the model's parameters until the comparison result finally satisfies the requirements of the loss function. The model is then saved. This neural network model can be, for example, a Bi-LSTM (Bi-Long Short-Term Memory) model.

[0064] By inputting a dataset from the current moment to a past moment into a trained neural network model, the load demand, water temperature (including the upper and lower surfaces of the radiant heat exchanger), and other parameters can be predicted for a predetermined future time period. For example, the water temperature could be the supply water temperature, with the return water temperature calculated as a 5°C difference.

[0065] In step 130, the load prediction value and the set temperature are input into the thermal inertia simulation model to obtain the simulation results. The simulation results include the response time required for the controlled indoor temperature to meet the set temperature corresponding to the parameter change value of the radiant air conditioning system. For example, the response time required for the controlled indoor temperature to meet the set temperature corresponding to at least one of the water temperature change value, water flow rate change value, and fan frequency change value.

[0066] This thermal inertia simulation model is based on the concept of a core temperature layer for floor radiation proposed by Koschenz. It assumes the existence of a hypothetical temperature layer on the plane of the water supply pipe's centerline within the floor slab, with its height located at the centerline of the pipe and a uniform temperature distribution equal to the average temperature of the concrete along the centerline. The standard radiant cooling floor slab model is divided into three sub-models: a core temperature layer model and upper and lower overlay models. All three sub-models use a π-type RC heat transfer model as the basic heat transfer model, considering the effects of convective heat transfer resistance within the water pipe and the pipe wall thermal resistance, as well as the effect of convective heat transfer resistance of the air on the floor surface. This embodiment does not impose specific limitations on the thermal inertia simulation model.

[0067] By inputting the load demand, water temperature (both the upper and lower surfaces of the radiant panel), and indoor temperature design values ​​into the floor radiant thermal inertia simulation model, the model can obtain the performance curves of step changes in floor surface temperature, water supply temperature, and water supply flow rate when indoor demand changes. Furthermore, it can determine the time required to adjust the indoor temperature to the set temperature when water temperature, water flow rate, and fan frequency change, thus enabling the radiant air conditioning system to be controlled in advance.

[0068] In step 140, based on the operating mode of the radiant air conditioning system, the load forecast value, and the simulation results, the operating parameters of the radiant air conditioning system are controlled. The operating mode includes heating mode or cooling mode.

[0069] In some embodiments, the radiant air conditioning system can operate in both heating and cooling modes, meaning it can share a single set of piping for both cooling and heating simultaneously. Compared to building two separate systems—one for air conditioning and one for floor radiant heating—this reduces the cost and energy waste associated with designing separate heating and cooling systems.

[0070] In some embodiments, when the radiant air conditioning system is in heating mode, the operating parameters include the water temperature parameters and water flow parameters of the pipeline. By adjusting the water temperature parameters and water flow parameters, the heat load can be provided to the room in a timely manner or the heat load can be reduced, thereby reducing the fluctuation of the indoor temperature. Furthermore, adjusting at least one of the water temperature and water flow in advance can reduce the problem of floor thermal inertia.

[0071] In some embodiments, when the radiant air conditioning system is in cooling mode, the operating parameters include fan frequency parameters and pipe water flow parameters. Typically, the indoor cooling load demand is higher than the heating load, while the radiant cooling capacity per unit area of ​​the floor is lower than the heat dissipation. Floors are generally laid according to heating requirements; therefore, measures to compensate for insufficient cooling load need to be considered. In this embodiment, by combining with a fresh air system, i.e., by adjusting the fan frequency to compensate for insufficient cooling load, the problems of poor matching and insufficient cooling capacity caused by using the same set of cooling and heating equipment in related technologies are solved.

[0072] In the above embodiments, since the load forecast value is obtained, it can be determined whether the load needs to be increased. Furthermore, since the thermal inertia simulation results are obtained, the radiant air conditioning system can be intelligently controlled in advance according to the load demand when the radiant air conditioning system is in heating or cooling mode. Therefore, this embodiment can effectively reduce the problem of floor thermal inertia, reduce the problems of untimely load supply and low indoor comfort caused by thermal inertia, and reduce the waste of system cold and heat sources because the load forecast is more accurate and the air conditioning is controlled according to the response time in the simulation results.

[0073] In some other embodiments of this disclosure, the control method further includes: determining a corresponding temperature difference range based on the difference between the indoor temperature and the set temperature in the operating mode, and controlling the operating parameters of the radiant air conditioning system based on the control strategy corresponding to the temperature difference range in the operating mode, the load forecast value, and the simulation results.

[0074] In this embodiment, when controlling the radiant air conditioning system, it is necessary to refer to the temperature range. That is, different control strategies can be adopted for different temperature difference ranges, which facilitates the subsequent achievement of precise control. In addition, by setting the temperature difference range, the same operation can be performed within a temperature range, which can also prevent the equipment from frequently starting and stopping, thus reducing the equipment lifespan.

[0075] In some embodiments, when the radiant air conditioning system is in heating mode, the temperature difference range includes a first range, a second range, a third range, a fourth range, and a fifth range. The lower limit of the temperature in the first range is greater than the upper limit of the temperature in the second range, the lower limit of the temperature in the second range is greater than the upper limit of the temperature in the third range, the lower limit of the temperature in the third range is greater than the upper limit of the temperature in the fourth range, the lower limit of the temperature in the fourth range is greater than the upper limit of the temperature in the fifth range, and the set temperature is within the third range.

[0076] For example, when a radiant air conditioning system is providing heating in winter, if the indoor temperature is much higher than the set temperature (i.e., the heat load exceeds demand), the temperature difference range is designated as the first range, and subsequent strategic control will follow the control strategy corresponding to the first range. If the indoor temperature is slightly higher than the set temperature, the temperature difference range is designated as the second range, and subsequent strategic control will follow the control strategy corresponding to the second range. If the indoor temperature matches the set temperature (i.e., the load supply and demand are consistent), the temperature difference range is designated as the third range, and no adjustment to the radiant air conditioning system is required. If the indoor temperature is slightly lower than the set temperature, the temperature difference range is designated as the fourth range, and subsequent strategic control will follow the control strategy corresponding to the fourth range. If the indoor temperature is much lower than the set temperature (i.e., the load supply is less than demand), the temperature difference range is designated as the fifth range, and subsequent strategic control will follow the control strategy corresponding to the fifth range.

[0077] In this embodiment, when the radiant air conditioning system provides heating, the indoor temperature difference is divided into multiple intervals. Different control strategies can be set for different intervals, thereby achieving precise control of the indoor temperature, maintaining indoor temperature balance, and avoiding the resource waste caused by simply comparing the indoor temperature with the indoor demand for parameter adjustment.

[0078] In some embodiments, when the difference between the indoor temperature and the set temperature is within a first range, the water temperature parameter or the water flow parameter is reduced in advance based on the load forecast value and the response time in the simulation results.

[0079] In this embodiment, when a severe oversupply of heat load is predicted, the supply of heat load can be reduced by lowering the water temperature or water flow rate in advance, regardless of whether the heat load demand increases. This will reduce the indoor temperature and keep the room temperature at a comfortable level.

[0080] In some embodiments, when it is determined that an increase in heat load is required based on the load forecast, the water temperature parameter is controlled to decrease the first water temperature in advance based on the first response time corresponding to the first water temperature change value, that is, the water temperature parameter is controlled to decrease the first water temperature in advance based on the first response time before the predetermined future time; or, the water flow parameter is controlled to decrease the first water flow in advance based on the second response time corresponding to the first water flow change value, that is, the water flow parameter is controlled to decrease the first water flow in advance based on the second response time before the predetermined future time. When it is determined that no increase in heat load is required based on the load forecast, the water temperature parameter is controlled to decrease the second water temperature in advance based on the third response time corresponding to the second water temperature change value, that is, the water temperature parameter is controlled to decrease the second water temperature in advance based on the third response time before the predetermined future time; or, the water flow parameter is controlled to decrease the second water flow in advance based on the fourth response time corresponding to the second water flow change value, that is, the water flow parameter is controlled to decrease the second water flow in advance based on the fourth response time before the predetermined future time.

[0081] By predicting values, it is possible to determine whether an increase in heat load is needed in the next moment, as well as the required water temperature or flow rate. This allows for the determination of the first water temperature change, the first water flow rate change, the second water temperature change, and the second water flow rate change. Through a thermal inertia simulation model, the response time required to control the indoor temperature to meet the set temperature when water temperature or flow rate changes can be determined. This allows for the preemptive reduction of water temperature or flow rate, reducing the risk of overheating, improving indoor comfort, and lowering energy consumption.

[0082] In some embodiments, since the current indoor heat load is in a state of oversupply, if an increase in heat load is predicted, the water temperature or water flow rate can be slightly reduced. If it is predicted that no increase in heat load is needed, the degree of reduction in water temperature or water flow rate should be increased. Therefore, the second water temperature is greater than the first water temperature and the second water flow rate is greater than the first water flow rate.

[0083] In some embodiments, if the difference between the indoor temperature and the set temperature is within a second range, and it is determined based on the load forecast that no additional heat load is required, then the water temperature parameter or the water flow parameter is reduced in advance based on the response time in the simulation results; and if it is determined based on the load forecast that an additional heat load is required, then the operating parameters of the radiant air conditioning system are maintained.

[0084] For example, in winter, when a radiant air conditioning system provides heating, the indoor heat load slightly exceeds demand. If it is predicted that the weather will get colder and the heat load will need to be increased, the radiant air conditioning system will maintain its current state, ensuring that the indoor temperature meets comfort requirements. If it is predicted that no additional heat load will be needed, the water temperature or flow rate will be reduced in advance to maintain a comfortable indoor temperature.

[0085] In some embodiments, based on the fifth response time corresponding to the third water temperature change value, the water temperature parameter is controlled to decrease the third water temperature in advance by the fifth response time, that is, the water temperature parameter is controlled to decrease the third water temperature in advance by the fifth response time before the future predetermined time; or, based on the sixth response time corresponding to the third water flow change value, the water flow parameter is controlled to decrease the third water flow in advance by the sixth response time, that is, the water flow parameter is controlled to decrease the third water flow in advance by the sixth response time before the future predetermined time.

[0086] For example, based on the water temperature or flow rate requirements, the thermal inertia simulation results show the response time required to control the indoor temperature to meet the set temperature when the water temperature or flow rate changes. This allows for proactive control to reduce the water temperature or flow rate, thereby lowering the indoor temperature, improving indoor comfort, and reducing energy consumption.

[0087] Since the heat load is slightly greater than the demand, if no further increase in heat load is required, the adjustment range will be smaller. Therefore, the third water temperature is lower than the first water temperature, and the third water flow rate is lower than the first water flow rate.

[0088] In some embodiments, the operating parameters of the radiant air conditioning system are maintained when the difference between the indoor temperature and the set temperature is within a third range.

[0089] For example, if the current indoor temperature is in a comfortable state, that is, the goal of constant temperature has been achieved, then the current operation of the radiant air conditioner is maintained, avoiding frequent adjustments to the air conditioning system while meeting the user's needs.

[0090] In some embodiments, if the difference between the indoor temperature and the set temperature is in the fourth interval, and it is determined that an increase in heat load is required based on the load forecast, the water temperature parameter or the water flow rate parameter is increased in advance based on the response time in the simulation results; and if it is determined that no increase in heat load is required based on the load forecast, the operating parameters of the radiant air conditioning system are maintained.

[0091] For example, in winter, when a radiant air conditioning system provides heating, the heat load is slightly less than the demand. If it is predicted that no further increase in heat load will be needed, the current state of the radiant air conditioning system will be maintained, and the indoor temperature will meet the comfort requirements. If it is predicted that the weather will get colder and an increase in heat load will be needed, the water temperature or water flow rate will be increased in advance to maintain a comfortable indoor temperature.

[0092] In some embodiments, based on the seventh response time corresponding to the fourth water temperature change value, the water temperature parameter is controlled to increase the fourth water temperature in advance by the seventh response time, that is, the water temperature parameter is controlled to increase the fourth water temperature in advance by the seventh response time before the future predetermined time; or, based on the eighth response time corresponding to the fourth water flow change value, the water flow parameter is controlled to increase the fourth water flow in advance by the eighth response time, that is, the water flow parameter is controlled to increase the fourth water flow in advance by the eighth response time before the future predetermined time.

[0093] For example, based on the water temperature or flow rate requirements, the thermal inertia simulation results show the response time required to control the indoor temperature to meet the set temperature when the water temperature or flow rate changes. This allows for proactive control to increase the water temperature or flow rate, thereby raising the indoor temperature, improving indoor comfort, and reducing energy consumption.

[0094] In some embodiments, when the difference between the indoor temperature and the set temperature is in the fifth interval, the water temperature parameter or the water flow parameter is increased in advance based on the load forecast value and the response time in the simulation results.

[0095] For example, when a severe shortage of heat load is predicted, the supply of heat load can be increased in advance by increasing the water temperature or water flow rate, regardless of whether the heat load demand increases. This will allow the indoor temperature to rise and maintain the room temperature at a comfortable level.

[0096] In some embodiments, when it is determined that an increase in heat load is required based on the load forecast, the water temperature parameter is controlled to increase the ninth water temperature in advance based on the ninth response time corresponding to the fifth water temperature change value, that is, the water temperature parameter is controlled to increase the ninth water temperature in advance based on the ninth response time before the predetermined future time; or, the water flow parameter is controlled to increase the fifth water flow in advance based on the tenth response time corresponding to the fifth water flow change value, that is, the water flow parameter is controlled to increase the fifth water flow in advance based on the tenth response time before the predetermined future time. When it is determined that no increase in heat load is required based on the load forecast, the water temperature parameter is controlled to increase the sixth water temperature in advance based on the eleventh response time corresponding to the sixth water temperature change value, that is, the water temperature parameter is controlled to increase the sixth water temperature in advance based on the eleventh response time before the predetermined future time; or, the water flow parameter is controlled to increase the sixth water flow in advance based on the twelfth response time corresponding to the sixth water flow change value, that is, the water flow parameter is controlled to increase the sixth water flow in advance based on the twelfth response time before the predetermined future time.

[0097] By predicting the values, it is possible to determine whether an increase in heat load is needed at the next moment, as well as the required water temperature or flow rate. This allows for the determination of the fifth, fifth, sixth, and sixth water temperature and flow rate changes. Through a thermal inertia simulation model, the response time required to control the indoor temperature to meet the set temperature when water temperature or flow rate changes can be determined. This allows for the advance increase of water temperature or flow rate, improving indoor comfort and mitigating overly cold conditions.

[0098] In some embodiments, since the current indoor heat load is less than the demand, if an increase in heat load is predicted, the water temperature or flow rate may need to be increased significantly; if no increase in heat load is predicted, the water temperature or flow rate may be increased less significantly. Therefore, the fifth water temperature is greater than the sixth water temperature, and the fifth water flow rate is greater than the sixth water flow rate. If the heat load is slightly less than the demand, and a subsequent increase in heat load is required, the adjustment range is smaller. Therefore, the fourth water temperature is less than the fifth water temperature, and the fourth water flow rate is less than the fifth water flow rate.

[0099] In some embodiments of this disclosure, the priority for adjusting the water temperature parameter or the water flow rate parameter is determined based on the outdoor temperature.

[0100] For example, a phased flow rate regulation method can be adopted, dividing the system into several stages based on outdoor temperature. During stages with lower outdoor temperatures, the maximum design flow rate should be maintained, while during stages with higher outdoor temperatures, a lower flow rate should be maintained. If the outdoor temperature falls between stages, the supply water temperature should be adjusted first; if the outdoor temperature falls between stages, the flow rate should be adjusted first. For instance, if the outdoor temperature is divided into 10°C-5°C, 5°C-0°C, and 0°C-5°C, if the outdoor temperature is 8°C, the supply water temperature should be adjusted first; if the outdoor temperature is 5°C, the flow rate should be adjusted first. This configuration is beneficial for system energy saving and stable operation.

[0101] In some embodiments, the operating parameters of the radiant air conditioning system include a humidity control module for the fresh air system. When the radiant air conditioning system is in heating mode, the humidity control module adjusts the indoor humidity based on the difference between the indoor relative humidity and the set indoor relative humidity value.

[0102] For radiant air conditioning systems, condensation will not occur because the floor surface temperature is high, exceeding the air dew point temperature. Therefore, dehumidification or humidification can be performed before or after adjusting the indoor temperature to ensure indoor comfort.

[0103] In this embodiment, by combining floor radiant heating with dehumidification or humidification control of the fresh air system, it is possible to prevent indoor humidity from deviating from the comfort zone.

[0104] For example, if the difference between the indoor relative humidity and the set indoor relative humidity is greater than a first humidity threshold, the indoor humidity is reduced; and if the difference between the indoor relative humidity and the set indoor relative humidity is less than the first humidity threshold, the indoor humidity is increased.

[0105] By controlling indoor humidity through a fresh air system, the indoor humidity can be maintained within a suitable range, thus improving the user experience.

[0106] In some embodiments of this disclosure, when the radiant air conditioning system is in cooling mode, the temperature difference range includes a sixth range, a seventh range, an eighth range, a ninth range, and a tenth range. The lower limit of the temperature in the sixth range is greater than the upper limit of the temperature in the seventh range, the lower limit of the temperature in the seventh range is greater than the upper limit of the temperature in the eighth range, the lower limit of the temperature in the eighth range is greater than the upper limit of the temperature in the ninth range, the lower limit of the temperature in the ninth range is greater than the upper limit of the temperature in the tenth range, and the set temperature is within the eighth range.

[0107] For example, in summer, when a radiant air conditioning system is providing cooling, if the indoor temperature is significantly higher than the set temperature, indicating a severe shortage of cooling load (supply less than demand), the temperature difference range is the sixth range. Subsequent strategic control will follow the control strategy corresponding to the sixth range. If the indoor temperature is slightly higher than the set temperature, the temperature difference range is the seventh range, and the same strategy will be applied. If the indoor temperature matches the set temperature, indicating a balance between supply and demand, the temperature difference range is the eighth range, and no adjustment to the radiant air conditioning system is needed. If the indoor temperature is slightly lower than the set temperature, the temperature difference range is the ninth range, and the same strategy will be applied. If the indoor temperature is significantly lower than the set temperature, indicating an excessive cooling load (supply more than demand), the temperature difference range is the tenth range, and the same strategy will be applied.

[0108] In this embodiment, when the radiant air conditioning system provides cooling, the indoor temperature difference range is divided into multiple ranges. Different control strategies can be set for different ranges, thereby achieving precise control of the indoor temperature. At the same time, it can avoid the resource waste caused by simply comparing the indoor temperature with the indoor demand and adjusting parameters.

[0109] In some embodiments, when the difference between the indoor temperature and the set temperature is in the sixth interval, the water flow parameter or the fan frequency parameter is increased in advance based on the load forecast value and the response time in the simulation results.

[0110] For example, in summer, if the indoor temperature is much higher than the set temperature when using a radiant cooling system, it indicates insufficient cooling. Regardless of whether the cooling load demand increases, it is necessary to increase the water flow or fan frequency in advance to improve the cooling load supply, thereby lowering the indoor temperature and maintaining a comfortable room temperature. Furthermore, by integrating with a fresh air system—that is, by adjusting the fan frequency to compensate for insufficient cooling load—the problem of poor matching and insufficient cooling capacity caused by using the same set of cooling and heating equipment in related technologies is solved.

[0111] In some embodiments, if it is determined from the load forecast that no additional cooling load is needed, the water flow parameter is controlled to increase the seventh water flow rate in advance according to the thirteenth response time corresponding to the seventh flow rate change value, that is, the water flow parameter is controlled to increase the seventh water flow rate in advance at the thirteenth response time before the future predetermined time; and if it is determined from the load forecast that an additional cooling load is needed, if the required additional cooling load is greater than a first threshold, the water flow parameter is controlled to increase the eighth water flow rate in advance according to the fourteenth response time corresponding to the eighth water flow rate change value, that is, the water flow parameter is controlled to increase the eighth water flow rate in advance at the fourteenth response time before the future predetermined time; if the required additional cooling load is less than or equal to the first threshold, the fan frequency parameter is controlled to increase the first fan frequency in advance according to the fifteenth response time corresponding to the first fan frequency change value, that is, the fan frequency parameter is controlled to increase the first fan frequency in advance at the fifteenth response time before the future predetermined time.

[0112] By predicting the values, we can determine whether an increase in cooling load is needed in the next moment, and the amount of cooling load required. This allows us to determine the required water flow rate and fan frequency, specifically the seventh and eighth water flow rate changes, and the first fan frequency change. Using a thermal inertia simulation model, we can determine the response time required to control the indoor temperature to meet the set temperature when water flow rate or fan frequency changes. This allows us to increase water flow rate or fan frequency in advance, reducing the risk of overheating and improving indoor comfort.

[0113] In some embodiments, since the current indoor cooling load is less than the demand, if an increase in cooling load is predicted, the water flow rate needs to be increased significantly; if no increase in cooling load is predicted, the water flow rate needs to be increased less. Therefore, the eighth water flow rate is greater than the seventh water flow rate. Furthermore, since a cooling load increase greater than a threshold requires a larger cooling load compared to a cooling load increase less than a threshold, adjusting the water flow rate is more effective in supplying the cooling load than adjusting the fan frequency. Therefore, when the cooling load increase is greater than the threshold, the water flow rate is adjusted first; when the cooling load increase is less than the threshold, the motor frequency is adjusted first, improving the stability of temperature regulation.

[0114] In some embodiments, if the difference between the indoor temperature and the set temperature is in the seventh interval, and it is determined that an increase in cooling load is needed based on the load forecast, the water flow rate parameter or the fan frequency parameter is increased in advance based on the response time in the simulation results; if it is determined that no increase in cooling load is needed based on the load forecast, the operating parameters of the radiant air conditioning system are maintained.

[0115] For example, if a radiant air conditioning system provides cooling in summer and the indoor cooling load is slightly less than the demand, and it is predicted that no additional cooling load will be needed, then the radiant air conditioning system will maintain its current state to ensure that the indoor temperature meets comfort requirements. If it is predicted that an additional cooling load will be needed, then the water flow rate or fan frequency will be increased in advance to provide more cooling load, thereby cooling the indoor temperature and meeting user needs.

[0116] In some embodiments, if the required increase in cooling load is determined to be greater than the second threshold based on the load forecast value, the water flow parameter is controlled to increase the ninth water flow rate in advance according to the sixteenth response time corresponding to the ninth water flow rate change value, that is, the water flow parameter is controlled to increase the ninth water flow rate in advance at the sixteenth response time before the future predetermined time; and if the required increase in cooling load is determined to be less than or equal to the second threshold based on the load forecast value, the fan frequency parameter is controlled to increase the second fan frequency in advance according to the seventeenth response time corresponding to the second fan frequency change value, that is, the fan frequency parameter is controlled to increase the second fan frequency in advance at the seventeenth response time before the future predetermined time.

[0117] Because adjusting the water flow rate can provide cooling load faster and in greater quantities compared to adjusting the fan frequency, adjusting the water flow rate when demand is high and adjusting the motor frequency when demand is low reduces indoor temperature fluctuations, improves the stability of indoor temperature regulation, and reduces resource waste.

[0118] In some embodiments, the second threshold may be the same as or different from the first threshold. If the first threshold is the same as the second threshold, since the difference between the indoor temperature and the set temperature is in the fifth interval compared to the sixth interval, a greater load-providing capacity is required when the cooling load needs to be increased. Therefore, the frequency of the first motor is greater than the frequency of the second motor.

[0119] In some embodiments, the operating parameters of the radiant air conditioning system are maintained when the difference between the indoor temperature and the set temperature is in the eighth range.

[0120] For example, if the current indoor temperature is in a comfortable state, that is, the goal of constant temperature has been achieved, then the current operation of the radiant air conditioner is maintained, avoiding frequent adjustments to the air conditioning system while meeting the user's needs.

[0121] In some embodiments, if the difference between the indoor temperature and the set temperature is in the ninth interval, and it is determined based on the load forecast that an increase in cooling load is required, the water flow rate parameter or the fan frequency parameter is increased in advance based on the response time in the simulation results; and if it is determined based on the load forecast that no increase in cooling load is required, the operating parameters of the radiant air conditioning system are maintained.

[0122] For example, during the summer, when radiant air conditioning is used for cooling, the cooling load may slightly exceed demand. If it is predicted that no further increase in cooling load will be needed, the current state of the radiant air conditioning system can be maintained, and the indoor temperature will meet comfort requirements. If it is predicted that the weather will get hotter and an increase in cooling load will be needed, the water flow or motor frequency can be increased in advance to maintain a comfortable indoor temperature.

[0123] In some embodiments, if the required increase in cooling load is determined to be greater than the third threshold based on the load forecast value, the water flow parameter is controlled to increase the tenth water flow rate in advance according to the eighteenth response time corresponding to the tenth water flow rate change value, that is, the water flow parameter is controlled to increase the tenth water flow rate in advance at the eighteenth response time before the future predetermined time; and if the required increase in cooling load is determined to be less than or equal to the third threshold based on the load forecast value, the fan frequency parameter is controlled to increase the third fan frequency in advance according to the nineteenth response time corresponding to the third fan frequency change value, that is, the fan frequency parameter is controlled to increase the third fan frequency in advance at the nineteenth response time before the future predetermined time.

[0124] Because adjusting the water flow rate can provide cooling load faster and in greater quantities compared to adjusting the fan frequency, adjusting the water flow rate when demand is high and adjusting the motor frequency when demand is low reduces indoor temperature fluctuations, improves the stability of indoor temperature regulation, and reduces resource waste.

[0125] In some embodiments, the third threshold may be the same as or different from the first threshold and the second threshold.

[0126] In some embodiments, when the difference between the indoor temperature and the set temperature is in the tenth interval, the water flow parameter or the fan frequency parameter is reduced in advance based on the load forecast value and the response time in the simulation results.

[0127] For example, if the indoor cooling load supply exceeds the demand, regardless of whether the cooling load demand increases, the cooling load supply can be reduced by decreasing the water flow or reducing the fan frequency in advance, thereby increasing the indoor temperature and preventing the indoor temperature from becoming too low, thus maintaining the room temperature at a comfortable level.

[0128] In some embodiments, if it is determined from the load forecast that no additional cooling load is needed, the water flow parameter is controlled to reduce the eleventh water flow in advance based on the twentieth response time corresponding to the eleventh water flow change value, that is, the water flow parameter is controlled to reduce the eleventh water flow in advance based on the twentieth response time before the predetermined future time; and if it is determined from the load forecast that an additional cooling load is needed, if the required additional cooling load is greater than the fourth threshold, the fan frequency parameter is controlled to reduce the fourth fan frequency in advance based on the twenty-first response time corresponding to the fourth fan frequency change value, that is, the fan frequency parameter is controlled to reduce the fourth fan frequency in advance based on the twenty-first response time before the predetermined future time; if the required additional cooling load is less than or equal to the fourth threshold, the fan frequency parameter is controlled to reduce the fifth fan frequency in advance based on the twenty-second response time corresponding to the fifth fan frequency change value, that is, the fan frequency parameter is controlled to reduce the fifth fan frequency in advance based on the twenty-second response time before the predetermined future time.

[0129] For example, if the indoor temperature is too low and subsequent forecasts indicate no need to increase the cooling load, cooling is supplied by adjusting the water flow rate. If subsequent forecasts indicate a need to increase the cooling load, cooling is supplied by adjusting the motor frequency, reducing resource waste. Furthermore, if the required increase in cooling load is large, the fan frequency adjustment range is smaller; if the required increase in cooling load is small, the fan frequency adjustment load is larger, meaning the fourth fan frequency is lower than the fifth fan frequency.

[0130] In some embodiments, the fourth threshold may be the same as or different from the first threshold, the second threshold, the third threshold, or the fourth threshold.

[0131] In some other embodiments of this disclosure, when the radiant air conditioning system is in cooling mode, the indoor humidity is adjusted using a humidity control module based on the relationship between the indoor relative humidity and the indoor relative humidity setpoint, and the relationship between the indoor air dew point temperature and the dew point temperature setpoint.

[0132] Condensation easily forms on the floor surface during radiant floor cooling. When the surface temperature is lower than the indoor air dew point temperature, condensation will occur. In this embodiment, the radiant floor cooling system is controlled in conjunction with the fresh air system, which can effectively control the condensation problem.

[0133] In some embodiments, when either the indoor relative humidity is greater than the indoor relative humidity setpoint or the indoor air dew point temperature is greater than the dew point temperature setpoint, the humidity control module is used to reduce the indoor humidity.

[0134] This setting ensures stable indoor temperature and humidity, maintaining a comfortable environment with constant temperature and humidity.

[0135] In some embodiments, when at least one of the water flow rate parameter and the fan frequency parameter is increased, the indoor humidity is adjusted using a humidity control module based on the relationship between indoor relative humidity and indoor relative humidity setpoint, and the relationship between indoor air dew point temperature and dew point temperature setpoint.

[0136] Because floor condensation easily occurs when indoor air temperature is too low, if humidity is controlled first and then temperature is controlled, condensation is likely to occur when the temperature drops, potentially leading to safety hazards. Therefore, in cooling systems, adjusting the indoor temperature first and then the indoor humidity can prevent floor condensation.

[0137] Figure 2 This is a flowchart illustrating some other embodiments of the control method for the radiant air conditioning system disclosed herein.

[0138] In step 210, determine whether Tc > T0 + ΔT22 is true. If true, proceed to step 211; otherwise, proceed to step 220. Tc is the actual indoor test temperature, T0 is the indoor set temperature (any value, set according to the actual project conditions), and ΔT22 is the set temperature variable (any numerical value).

[0139] In step 211, determine whether the predicted heat load will increase at the next moment. If so, proceed to step 212; otherwise, proceed to step 216.

[0140] In step 212, control is performed at an advance time T1 to reduce the water supply temperature ΔT1, or at an advance time T2 to reduce the water supply flow rate ΔG1, wherein a judgment is made once at an interval Δt. The water supply temperature or water flow rate must not exceed the system limit value.

[0141] In step 213, determine whether the indoor relative humidity RHi > RH0 + ΔRH is true. If it is true, proceed to step 214; otherwise, proceed to step 215. RHi is the indoor relative humidity value, RH0 is the indoor relative humidity setpoint, and ΔRH is the relative humidity deviation value.

[0142] In step 214, dehumidification is performed using a dehumidification system.

[0143] In step 215, humidification is performed using a humidification system.

[0144] In step 216, the water supply temperature is reduced by ΔT2 at an advance time T3, or the water supply flow rate is reduced by ΔG2 at an advance time T4, and a judgment is made once at an interval Δt.

[0145] In step 217, determine whether the indoor relative humidity RHi>RH0+ΔRH is true. If it is true, proceed to step 218; otherwise, proceed to step 219.

[0146] In step 218, dehumidification is performed using a dehumidification system.

[0147] In step 219, humidification is performed using a humidification system.

[0148] In step 220, determine whether Tc>T0+ΔT1 is true. ΔT1 is the set temperature variable, which can be any numerical variable. Usually, the set value is less than ΔT2. If yes, proceed to step 221; otherwise, proceed to step 230.

[0149] In step 221, determine whether the predicted heat load will increase at the next moment. If not, proceed to step 222; if yes, proceed to step 226.

[0150] In step 222, the water supply temperature is reduced by ΔT3 at an advance time T5, or the water supply flow rate is reduced by ΔG3 at an advance time T6. The system checks the water supply temperature or flow rate once at an interval Δt, and the water supply temperature or flow rate must not exceed the system limit value.

[0151] In step 223, determine whether the indoor relative humidity RHi>RH0+ΔRH is true. If it is true, proceed to step 224; otherwise, proceed to step 225.

[0152] In step 224, dehumidification is performed using a dehumidification system.

[0153] In step 225, humidification is performed using a humidification system.

[0154] In step 226, the system does not change the control and operates normally in the current mode.

[0155] In step 230, determine whether Tc>T0-ΔT1 is true. If it is true, proceed to step 231; otherwise, proceed to step 240. ΔT1 is a set temperature variable, which can be any value, but is less than ΔT2.

[0156] In step 231, the control strategy is not changed, and the system operates normally under the current mode, with a judgment made once at an interval of Δt.

[0157] In step 232, determine whether the indoor relative humidity RHi>RH0+ΔRH is true. If it is true, proceed to step 233; otherwise, proceed to step 234.

[0158] In step 233, dehumidification is performed using a dehumidification system.

[0159] In step 234, humidification is performed using a humidification system.

[0160] In step 240, determine whether Tc>T0-ΔT2 is true. If it is true, proceed to step 241; otherwise, proceed to step 250. ΔT2 is a set temperature variable, which can be any value.

[0161] In step 241, determine whether the predicted heat load will increase at the next moment. If not, proceed to step 242; if yes, proceed to step 246.

[0162] In step 242, the system does not change the control and operates normally in the current mode.

[0163] In step 243, determine whether the indoor relative humidity RHi>RH0+ΔRH is true. If it is true, proceed to step 244; otherwise, proceed to step 245.

[0164] In step 244, dehumidification is performed using a dehumidification system.

[0165] In step 245, humidification is performed using a humidification system.

[0166] In step 246, control is performed at an advance time T7 to increase the water supply temperature ΔT4, or at an advance time T8 to increase the water supply flow rate ΔG4. A judgment is made once at an interval Δt, and the water supply temperature or water flow rate must not exceed the system limit value.

[0167] In step 247, determine whether the indoor relative humidity RHi>RH0+ΔRH is true. If it is true, proceed to step 248; otherwise, proceed to step 249.

[0168] In step 248, dehumidification is performed using a dehumidification system.

[0169] In step 249, humidification is performed using a humidification system.

[0170] In step 250, determine whether the predicted heat load will increase at the next moment. If so, proceed to step 251; otherwise, proceed to step 255.

[0171] In step 251, control is performed at an advance time T9 to increase the water supply temperature ΔT5, or at an advance time T10 to increase the water supply flow rate ΔG5. A judgment is made once at an interval Δt, and the water supply temperature or water flow rate must not exceed the system limit value.

[0172] In step 252, determine whether the indoor relative humidity RHi>RH0+ΔRH is true. If it is true, proceed to step 253; otherwise, proceed to step 254.

[0173] In step 253, dehumidification is performed using a dehumidification system.

[0174] In step 254, humidification is performed using a humidification system.

[0175] In step 255, control is performed at an advance time T11 to decrease the water supply temperature ΔT6, or at an advance time T12 to increase the water supply flow rate ΔG6. A judgment is made once at an interval Δt, and the water supply temperature or water flow rate must not exceed the system limit value.

[0176] In the above embodiments, the combined control of floor radiant heating and the fresh air system ensures stable indoor temperature and humidity, maintaining a comfortable environment with constant temperature and humidity, and preventing indoor humidity from deviating from the comfort zone. Furthermore, pre-controlling water temperature and flow effectively avoids the thermal inertia problem inherent in independent floor radiant heating and humidity control systems.

[0177] Figure 3 This is a flowchart illustrating some other embodiments of the control method for the radiant air conditioning system disclosed herein.

[0178] In step 310, determine whether Tc > T0 + ΔT23 is true. If true, proceed to step 311; otherwise, proceed to step 320. Tc is the actual indoor test temperature, T0 is the indoor set temperature (any value, set according to the actual project conditions), and ΔT23 is the set temperature variable (any numerical value).

[0179] In step 311, determine whether the predicted cooling load will increase at the next moment. If not, proceed to step 312; otherwise, proceed to step 316.

[0180] In step 312, the water flow rate ΔG7 is reduced by controlling the advance time T13.

[0181] In step 313, it is determined whether the indoor air dew point temperature Ti≤T0 and the indoor air relative humidity RHi≤RH0 are both true. If yes, proceed to step 314; otherwise, proceed to step 315. T0 is the temperature boundary value at which condensation occurs on the floor surface, and RH0 is the set value of indoor air relative humidity. Exceeding this value will easily cause condensation.

[0182] In step 314, continue running without dehumidification, and make a judgment once at an interval Δt.

[0183] In step 315, ventilation and dehumidification are performed to prevent condensation, and a judgment is made once at an interval Δt.

[0184] In step 316, determine whether the increase in cooling load Δζ > ζ1 is true. If yes, proceed to step 317; otherwise, proceed to step 3111. Δζ is the change in cooling load, which can be an increase or decrease. ζ1 is the set value for the change in cooling load, which can be any numerical variable.

[0185] In step 317, the advance time T14 is controlled to increase the water flow rate ΔG8.

[0186] In step 318, determine whether the indoor air dew point temperature Ti≤T0 and the indoor air relative humidity RHi≤RH0 are both true. If yes, proceed to step 319; otherwise, proceed to step 3110.

[0187] In step 319, continue running without dehumidification, and make a judgment once at an interval Δt.

[0188] In step 3110, ventilation and dehumidification are performed to prevent condensation, and a judgment is made once at an interval Δt.

[0189] In step 3111, the advance time T15 is controlled to increase the fan frequency Δf1.

[0190] In step 3112, determine whether the indoor air dew point temperature Ti≤T0 and the indoor air relative humidity RHi≤RH0 are both true. If yes, proceed to step 319; otherwise, proceed to step 3110.

[0191] In step 3113, continue running without dehumidification, and make a judgment once at an interval Δt.

[0192] In step 3114, ventilation and dehumidification are performed to prevent condensation, and a judgment is made once at an interval Δt.

[0193] In step 320, determine whether Tc>T0+ΔT13 is true. If it is true, proceed to step 321; otherwise, proceed to step 330. ΔT13 is the set temperature variable, which can be any numerical variable, and is usually set to a value less than ΔT23.

[0194] In step 321, determine whether the predicted cooling load will increase at the next moment. If not, proceed to step 322; if yes, proceed to step 323.

[0195] In step 322, the system operates normally according to the current time control mode without changing the control.

[0196] In step 323, determine whether the increase in cooling load Δζ>ζ1 is true. If yes, proceed to step 324; otherwise, proceed to step 328.

[0197] In step 324, the water flow rate ΔG9 is increased by controlling the advance time T16.

[0198] In step 325, determine whether the indoor air dew point temperature Ti≤T0 and the indoor air relative humidity RHi≤RH0 are both true. If yes, proceed to step 326; otherwise, proceed to step 327.

[0199] In step 326, continue running without dehumidification, and make a judgment once at an interval Δt.

[0200] In step 327, ventilation and dehumidification are performed to prevent condensation, and a judgment is made once at an interval Δt.

[0201] In step 328, the fan frequency Δf2 is increased by controlling the advance time T17.

[0202] In step 329, determine whether the indoor air dew point temperature Ti≤T0 and the indoor air relative humidity RHi≤RH0 are both true. If yes, proceed to step 3210; otherwise, proceed to step 3211.

[0203] In step 3210, the system continues to operate without dehumidification, and a judgment is made once at an interval Δt.

[0204] In step 3211, ventilation and dehumidification are performed to prevent condensation, and a judgment is made once at an interval Δt.

[0205] In step 330, determine whether Tc>T0-ΔT13 is true. If it is true, proceed to step 331; otherwise, proceed to step 340. ΔT13 is a set temperature variable, which can be any value, but is less than ΔT2.

[0206] In step 331, the control strategy is not changed, and the system operates normally under the current mode, with a judgment performed once at an interval of Δt.

[0207] In step 340, determine whether Tc>T0-ΔT2 is true. If it is true, proceed to step 341; otherwise, proceed to step 350. ΔT2 is a set temperature variable, which can be any value.

[0208] In step 341, determine whether the predicted cooling load will increase at the next moment. If not, proceed to step 342; otherwise, proceed to step 343.

[0209] In step 342, the system does not change the control and operates normally in the current mode.

[0210] In step 343, determine whether the increase in cooling load Δζ>ζ1 is true. If yes, proceed to step 344; otherwise, proceed to step 348.

[0211] In step 344, the advance time T18 is controlled to increase the water flow rate ΔG10.

[0212] In step 345, determine whether the indoor air dew point temperature Ti≤T0 and the indoor air relative humidity RHi≤RH0 are both true. If yes, proceed to step 346; otherwise, proceed to step 347.

[0213] In step 346, continue running without dehumidification, and make a judgment once at an interval Δt.

[0214] In step 347, ventilation and dehumidification are performed to prevent condensation, and a judgment is made once at an interval Δt.

[0215] In step 348, the fan frequency Δf3 is increased by controlling the advance time T19.

[0216] In step 349, determine whether the indoor air dew point temperature Ti≤T0 and the indoor air relative humidity RHi≤RH0 are both true. If yes, proceed to step 3410; otherwise, proceed to step 3411.

[0217] In step 3410, the system continues to operate without dehumidification, and a judgment is made once at an interval Δt.

[0218] In step 3411, ventilation and dehumidification are performed to prevent condensation, and a judgment is made once at an interval Δt.

[0219] In step 350, determine whether the predicted cooling load will increase at the next moment. If yes, proceed to step 351; otherwise, proceed to step 354.

[0220] In step 351, determine whether the increase in cooling load Δζ>ζ1 is true. If yes, proceed to step 352; otherwise, proceed to step 353.

[0221] In step 352, the fan frequency Δf6 is reduced by advance time T21.

[0222] In step 353, the advance time T22 is controlled to reduce the fan frequency Δf5.

[0223] In step 354, control is performed at an advance time T20 to reduce the water flow rate ΔG11, but the water flow rate cannot exceed the system limit value, and a judgment is made once at an interval Δt.

[0224] In the above embodiments, the floor radiant cooling and fresh air system are jointly controlled to ensure stable indoor temperature and humidity, thus maintaining a comfortable environment with constant temperature and humidity. This effectively prevents condensation on the floor. In addition, advance control of water flow and motor frequency can effectively avoid the thermal inertia problem of the floor in independent temperature and humidity control systems, and compensate for insufficient cooling load. This solves the problems of poor matching and insufficient cooling capacity caused by using the same set of cooling and heating equipment in related technologies.

[0225] Figure 4This is a schematic diagram of the structure of some embodiments of the control device for the radiant air conditioning system disclosed herein. The control device includes a data acquisition module 410, a prediction module 420, a simulation module 430, and a control module 440.

[0226] The acquisition module 410 is configured to acquire the dataset required for load forecasting.

[0227] In some embodiments, the data set required for load forecasting is collected using a field group control system. This data set includes, for example, outdoor dry-bulb temperature Toa, outdoor relative humidity RHTo, indoor dry-bulb temperature Tia, air dew point temperature Ti, indoor relative humidity RHi, indoor relative humidity setpoint RH0, cold and heat source supply water temperature Tg, cold and heat source return water temperature Th, floor surface temperature Td, room flow rate G, as well as meteorological data purchased from the meteorological bureau, holiday times, building envelope parameters, etc.

[0228] The forecasting module 420 is configured to forecast load values ​​for a predetermined future time based on the dataset required for load forecasting.

[0229] In some embodiments, the load forecast includes load demand over a predetermined future time period, water temperature, the upper surface temperature of the radiant plate, and the lower surface temperature of the radiant plate, etc.

[0230] The simulation module 430 is configured to input the load prediction value and the set temperature into the thermal inertia simulation model to obtain the simulation results. The simulation results include the response time required for the controlled indoor temperature to meet the set temperature corresponding to the parameter change value of the radiant air conditioning system. For example, the response time required for the controlled indoor temperature to meet the set temperature corresponding to at least one of the water temperature change value, water flow rate change value, and fan frequency change value.

[0231] The control module 440 is configured to control the operating parameters of the radiant air conditioning system based on the operating mode, load forecast, and simulation results of the radiant air conditioning system. The operating mode includes heating mode or cooling mode.

[0232] In some embodiments, the radiant air conditioning system can operate in both heating and cooling modes, meaning it can share a single set of piping for both heating and cooling. Compared to building two separate systems—one for air conditioning and one for floor radiant heating—this reduces the cost and energy waste associated with designing separate heating and cooling systems.

[0233] In some embodiments, when the radiant air conditioning system is in heating mode, the operating parameters include the water temperature parameters and water flow parameters of the pipeline. By adjusting the temperature parameters and water flow parameters, the heat load can be provided to the room in a timely manner or the heat load can be reduced, thereby reducing the fluctuation of the indoor temperature.

[0234] In some embodiments, when the radiant air conditioning system is in cooling mode, the operating parameters include fan frequency parameters and pipe water flow parameters. By combining it with a fresh air system, i.e., by adjusting the fan frequency to compensate for insufficient cooling load, the problems of poor matching and insufficient cooling capacity caused by using the same set of cooling and heating equipment in related technologies are solved.

[0235] In the above embodiments, since the load forecast value is obtained, it can be determined whether the load needs to be increased. Furthermore, since the thermal inertia simulation results are obtained, the radiant air conditioning system can be intelligently controlled in advance according to the load demand when the radiant air conditioning system is in heating or cooling mode. Therefore, this embodiment can effectively reduce the problem of floor thermal inertia, reduce the problems of untimely load supply and low indoor comfort caused by thermal inertia, and reduce the waste of system cold and heat sources.

[0236] In some embodiments, such as Figure 5 The control device also includes a calculation module 551, which is configured to determine the corresponding temperature difference range based on the difference between the indoor temperature and the set temperature in the operating mode. The control module 440 is further configured to control the operating parameters of the radiant air conditioning system based on the control strategy corresponding to the temperature difference range in the operating mode, the load prediction value, and the simulation results.

[0237] In the above embodiments, when the radiant air conditioning system provides heating, the indoor temperature difference range is divided into multiple ranges. Different control strategies can be set for different ranges, thereby achieving precise control of the indoor temperature. At the same time, it can avoid the resource waste caused by simply comparing the indoor temperature with the indoor demand and adjusting parameters.

[0238] In some embodiments, when the radiant air conditioning system is in heating mode, the temperature difference range includes a first range, a second range, a third range, a fourth range, and a fifth range. The lower limit of the temperature in the first range is greater than the upper limit of the temperature in the second range, the lower limit of the temperature in the second range is greater than the upper limit of the temperature in the third range, the lower limit of the temperature in the third range is greater than the upper limit of the temperature in the fourth range, the lower limit of the temperature in the fourth range is greater than the upper limit of the temperature in the fifth range, and the set temperature is within the third range.

[0239] In some embodiments, the control module 440 is configured to reduce the water temperature parameter or the water flow parameter in advance, based on the load forecast value and the response time in the simulation results, when the difference between the indoor temperature and the set temperature is within a first range.

[0240] For example, if it is determined that an increase in heat load is needed based on the load forecast, the water temperature parameter can be controlled to decrease the first water temperature in advance based on the first response time corresponding to the first water temperature change value, or the water flow parameter can be controlled to decrease the first water flow in advance based on the second response time corresponding to the first water flow change value; and if it is determined that no increase in heat load is needed based on the load forecast, the water temperature parameter can be controlled to decrease the second water temperature in advance based on the third response time corresponding to the second water temperature change value, or the water flow parameter can be controlled to decrease the second water flow in advance based on the fourth response time corresponding to the second water flow change value.

[0241] In the above embodiments, when a severe oversupply of heat load is predicted, the supply of heat load can be reduced by lowering the water temperature or water flow rate in advance, regardless of whether the heat load demand increases. This can reduce the indoor temperature and maintain the room temperature at a comfortable level.

[0242] In some embodiments, the control module 440 is configured to, if the difference between the indoor temperature and the set temperature is in a second range, reduce the water temperature parameter or the water flow parameter in advance based on the response time in the simulation results if it is determined from the load forecast value that no additional heat load is needed; and if it is determined from the load forecast value that an additional heat load is needed, maintain the operating parameters of the radiant air conditioning system.

[0243] For example, based on the fifth response time corresponding to the third water temperature change value, the water temperature parameter can be controlled to decrease the third water temperature in advance by the fifth response time; or, based on the sixth response time corresponding to the third water flow change value, the water flow parameter can be controlled to decrease the third water flow in advance by the sixth response time.

[0244] In the above embodiments, proactively controlling and reducing water temperature or flow rate can lower the indoor temperature, improve indoor comfort, and reduce energy consumption.

[0245] In some embodiments, the control module 440 is configured to maintain the operating parameters of the radiant air conditioning system when the difference between the indoor temperature and the set temperature is in a third range.

[0246] In some embodiments, the control module 440 is configured to, if the difference between the indoor temperature and the set temperature is in a fourth interval, increase the water temperature parameter or increase the water flow parameter in advance based on the response time in the simulation results if it is determined that an increase in heat load is required based on the load forecast value; and if it is determined that no increase in heat load is required based on the load forecast value, maintain the operating parameters of the radiant air conditioning system.

[0247] For example, based on the seventh response time corresponding to the fourth water temperature change value, the water temperature parameter can be increased by the seventh response time in advance; or, based on the eighth response time corresponding to the fourth water flow change value, the water flow parameter can be increased by the eighth response time in advance.

[0248] In the above embodiments, proactively controlling the increase of water temperature or water flow can raise the indoor temperature, improve indoor comfort, and reduce energy consumption.

[0249] In some embodiments, the control module 440 is configured to increase the water temperature parameter or the water flow rate parameter in advance, based on the load forecast value and the response time in the simulation results, when the difference between the indoor temperature and the set temperature is in the fifth interval.

[0250] For example, if it is determined that an increase in heat load is needed based on the load forecast, the water temperature parameter can be increased by the ninth response time corresponding to the fifth water temperature change value, or the water flow parameter can be increased by the tenth response time corresponding to the fifth water flow change value; and if it is determined that no increase in heat load is needed based on the load forecast, the water temperature parameter can be increased by the eleventh response time corresponding to the sixth water temperature change value, or the water flow parameter can be increased by the twelfth response time corresponding to the sixth water flow change value.

[0251] In the above embodiments, the thermal inertia simulation model can determine the response time required to control the indoor temperature to meet the set temperature when the water temperature or water flow changes. This allows for an earlier increase in water temperature or water flow, which can improve the situation of excessively cold indoor temperature and enhance indoor comfort.

[0252] In some embodiments, the control module 440 is further configured to determine, based on the outdoor temperature, whether to prioritize adjusting the water temperature parameter or the water flow parameter, thereby achieving system energy saving and improving system operational stability.

[0253] In some other embodiments of this disclosure, when the radiant air conditioning system is in cooling mode, the temperature difference range includes a sixth range, a seventh range, an eighth range, a ninth range, and a tenth range. The lower limit of the temperature in the sixth range is greater than the upper limit of the temperature in the seventh range, the lower limit of the temperature in the seventh range is greater than the upper limit of the temperature in the eighth range, the lower limit of the temperature in the eighth range is greater than the upper limit of the temperature in the ninth range, the lower limit of the temperature in the ninth range is greater than the upper limit of the temperature in the tenth range, and the set temperature is within the eighth range.

[0254] In the above embodiments, when the radiant air conditioning system provides cooling, the indoor temperature difference range is divided into multiple ranges. Different control strategies can be set for different ranges, thereby achieving precise control of the indoor temperature. At the same time, it can avoid the resource waste caused by simply comparing the indoor temperature with the indoor demand and adjusting parameters.

[0255] In some embodiments, the control module 440 is configured to increase the water flow rate parameter or the fan frequency parameter in advance, based on the load forecast value and the response time in the simulation results, when the difference between the indoor temperature and the set temperature is in the sixth interval.

[0256] For example, if it is determined from the load forecast that no additional cooling load is needed, the water flow parameter is controlled to increase the seventh water flow rate in advance according to the thirteenth response time corresponding to the seventh flow rate change value; and if it is determined from the load forecast that an additional cooling load is needed, if the required additional cooling load is greater than the first threshold, the water flow parameter is controlled to increase the eighth water flow rate in advance according to the fourteenth response time corresponding to the eighth water flow rate change value; if the required additional cooling load is less than or equal to the first threshold, the fan frequency parameter is controlled to increase the first fan frequency in advance according to the fifteenth response time corresponding to the first fan frequency change value.

[0257] In this embodiment, by using a thermal inertia simulation model, the response time required to control the indoor temperature to meet the set temperature when the water flow or fan frequency changes can be determined. This allows for the timely increase of the water flow or fan frequency, which can reduce the risk of overheating and improve indoor comfort.

[0258] In some embodiments, the control module 440 is configured to, if the difference between the indoor temperature and the set temperature is in the seventh interval, increase the water flow rate parameter or increase the fan frequency parameter in advance based on the response time in the simulation results if it is determined that an increase in cooling load is required based on the load forecast value; and if it is determined that no increase in cooling load is required based on the load forecast value, maintain the operating parameters of the radiant air conditioning system.

[0259] For example, if the required increase in cooling load is determined to be greater than the second threshold based on the load forecast, the water flow parameter is controlled to increase the ninth water flow rate in advance according to the sixteenth response time corresponding to the ninth water flow rate change value; and if the required increase in cooling load is determined to be less than or equal to the second threshold based on the load forecast, the fan frequency parameter is controlled to increase the second fan frequency in advance according to the seventeenth response time corresponding to the second fan frequency change value.

[0260] This embodiment increases the water flow rate or fan frequency in advance to provide more cooling load, thereby cooling the room and meeting user needs.

[0261] In some embodiments, the control module 440 is configured to maintain the operating parameters of the radiant air conditioning system when the difference between the indoor temperature and the set temperature is in the eighth interval.

[0262] In some embodiments, the control module 440 is configured to, if the difference between the indoor temperature and the set temperature is in the ninth interval, increase the water flow rate parameter or increase the fan frequency parameter in advance based on the response time in the simulation results if it is determined that an increase in cooling load is required based on the load forecast value; and if it is determined that no increase in cooling load is required based on the load forecast value, maintain the operating parameters of the radiant air conditioning system.

[0263] For example, if the required increase in cooling load is determined to be greater than the third threshold based on the load forecast, the water flow parameter is controlled to increase the tenth water flow rate in advance based on the eighteenth response time corresponding to the tenth water flow rate change value; and if the required increase in cooling load is determined to be less than or equal to the third threshold based on the load forecast, the fan frequency parameter is controlled to increase the third fan frequency in advance based on the nineteenth response time corresponding to the third fan frequency change value.

[0264] Because adjusting the water flow rate can provide cooling load faster and in greater quantities compared to adjusting the fan frequency, adjusting the water flow rate when demand is high and adjusting the motor frequency when demand is low reduces indoor temperature fluctuations, improves the stability of indoor temperature regulation, and reduces resource waste.

[0265] In some embodiments, the control cave 440 is configured to reduce the water flow parameter or the fan frequency parameter in advance, based on the load forecast value and the response time in the simulation results, when the difference between the indoor temperature and the set temperature is in the tenth interval.

[0266] For example, if it is determined from the load forecast that no additional cooling load is needed, the water flow parameter is controlled to reduce the eleventh water flow based on the twentieth response time corresponding to the eleventh water flow change value. And if it is determined from the load forecast that an additional cooling load is needed, if the required additional cooling load is greater than the fourth threshold, the fan frequency parameter is controlled to reduce the fourth fan frequency based on the twenty-first response time corresponding to the fourth fan frequency change value. If the required additional cooling load is less than or equal to the fourth threshold, the fan frequency parameter is controlled to reduce the fifth fan frequency based on the twenty-second response time corresponding to the fifth fan frequency change value.

[0267] In this embodiment, the indoor cooling load supply exceeds the demand. Regardless of whether the cooling load demand increases, the cooling load supply can be reduced by decreasing the water flow or reducing the fan frequency in advance, thereby causing the indoor temperature to rise and preventing the indoor temperature from being too low, thus maintaining the room temperature at a comfortable level.

[0268] In some embodiments, the control module 440 is further configured to adjust the indoor humidity using a humidity control module based on the difference between the indoor relative humidity and the indoor relative humidity set value when the radiant air conditioning system is in heating mode.

[0269] For example, if the difference between the indoor relative humidity and the set indoor relative humidity is greater than a first humidity threshold, the indoor humidity is reduced; and if the difference between the indoor relative humidity and the set indoor relative humidity is less than the first humidity threshold, the indoor humidity is increased.

[0270] In the above embodiments, the combined control of floor radiant heating and fresh air system can prevent indoor humidity from deviating from the comfort zone.

[0271] In some embodiments, the control module 440 is further configured to adjust the indoor humidity using a humidity control module when the radiant air conditioning system is in cooling mode, based on the relationship between the indoor relative humidity and the indoor relative humidity setpoint, and the relationship between the indoor air dew point temperature and the dew point temperature setpoint.

[0272] For example, if either the indoor relative humidity is greater than the set value or the indoor air dew point temperature is greater than the set value, the humidity control module can be used to reduce the indoor humidity.

[0273] In this embodiment, the floor radiant cooling system is controlled in conjunction with the fresh air system, which can effectively control the condensation problem.

[0274] In some embodiments, when at least one of the water flow rate parameter and the fan frequency parameter is increased, the indoor humidity is adjusted using a humidity control module based on the relationship between the indoor relative humidity and the indoor relative humidity setpoint, and the relationship between the indoor air dew point temperature and the dew point temperature setpoint. In cooling situations, using a control method that adjusts the indoor temperature first and then the indoor humidity can prevent condensation on the floor.

[0275] Figure 6 This is a schematic diagram of the structure of some embodiments of the control device for a radiant air conditioning system disclosed herein. The control device 600 includes a memory 610 and a processor 620. The memory 610 can be a disk, flash memory, or any other non-volatile storage medium. The memory 610 is used to store instructions in the above embodiments. The processor 620 is coupled to the memory 610 and can be implemented as one or more integrated circuits, such as a microprocessor or microcontroller. The processor 620 is used to execute the instructions stored in the memory.

[0276] In some embodiments, the processor 620 is coupled to the memory 610 via a BUS bus 630. The control device 600 can also be connected to an external storage device 650 via a storage interface 640 to access external data, and can also be connected to a network or another computer system (not shown) via a network interface 660, which will not be described in detail here.

[0277] In this embodiment, storing data instructions in a memory and then processing those instructions with a processor can effectively solve the thermal inertia problem.

[0278] In other embodiments of this disclosure, a radiant air conditioning system is protected, which includes the control device of the radiant air conditioning system in the above embodiments. This system simultaneously provides cooling and heating, avoiding the cost and energy waste caused by separate designs for heating and cooling systems. The radiant air conditioning system integrates a radiant system and a fresh air system, simultaneously meeting both cooling and heating needs, reducing the difficulty of designing and selecting systems for simultaneous cooling and heating. Furthermore, the joint control of floor radiant cooling and the fresh air system effectively prevents floor condensation, while the joint control of floor radiant heating and the fresh air system prevents indoor humidity from deviating from the comfort zone. Based on the system's load prediction, floor thermal inertia simulation, and automatic control optimization functions, the floor thermal inertia problem in independent floor radiant temperature and humidity control systems can be effectively avoided. Moreover, while maintaining stable indoor temperature, it ensures stable humidity, always ensuring a comfortable environment with constant temperature and humidity.

[0279] In other embodiments, a computer-readable storage medium stores computer program instructions that, when executed by a processor, implement the steps of the methods described above. Those skilled in the art will understand that embodiments of this disclosure can be provided as methods, apparatus, or computer program products. Therefore, this disclosure can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this disclosure can take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0280] This disclosure is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this disclosure. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create a machine for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0281] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0282] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0283] This concludes the detailed description of the present disclosure. To avoid obscuring the concept of the disclosure, some details known in the art have not been described. Those skilled in the art will fully understand how to implement the technical solutions disclosed herein based on the above description.

[0284] The methods and apparatus of this disclosure may be implemented in many ways. For example, they may be implemented by software, hardware, firmware, or any combination of software, hardware, and firmware. The above-described order of steps for the methods is for illustrative purposes only, and the steps of the methods of this disclosure are not limited to the order specifically described above unless otherwise specifically stated. Furthermore, in some embodiments, this disclosure may also be implemented as a program recorded on a recording medium, the program including machine-readable instructions for implementing the methods according to this disclosure. Thus, this disclosure also covers recording media storing programs for performing the methods according to this disclosure.

[0285] While specific embodiments of this disclosure have been described in detail by way of example, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of this disclosure. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of this disclosure. The scope of this disclosure is defined by the appended claims.

Claims

1. A control method for a radiant air conditioning system, comprising: Obtain the dataset required for load forecasting; Based on the dataset required for load forecasting, predict the load forecast for a future predetermined time. The load forecast and set temperature are input into the thermal inertia simulation model to obtain simulation results, wherein the simulation results include the parameter changes of the radiant air conditioning system and the corresponding response time required for the indoor temperature to meet the set temperature. Based on the difference between the indoor temperature and the set temperature in the operating mode, a corresponding temperature difference range is determined, wherein the operating mode includes a heating mode or a cooling mode; and The operating parameters of the radiant air conditioning system are controlled based on the control strategy corresponding to the temperature difference range under the operating mode, the load prediction value, and the simulation results.

2. The control method according to claim 1, wherein, When the radiant air conditioning system is in heating mode, the parameter change value includes at least one of the water temperature change value and the water flow rate change value, and the operating parameter includes at least one of the pipeline water temperature parameter and the water flow rate parameter. Controlling the operating parameters of the radiant air conditioning system includes: Based on the control strategy corresponding to the temperature difference range under the heating mode, the load prediction value, and the simulation results, determine whether to adjust at least one of the water temperature parameter and water flow rate parameter of the radiant air conditioning system in advance.

3. The control method according to claim 2, wherein, The temperature difference range includes a first range, a second range, a third range, a fourth range, and a fifth range. The lower limit of the temperature in the first range is greater than the upper limit of the temperature in the second range. The lower limit of the temperature in the second range is greater than the upper limit of the temperature in the third range. The lower limit of the temperature in the third range is greater than the upper limit of the temperature in the fourth range. The lower limit of the temperature in the fourth range is greater than the upper limit of the temperature in the fifth range. The set temperature is located within the third range.

4. The control method according to claim 3, wherein, Determining whether to adjust at least one of the water temperature and water flow parameters of the radiant air conditioning system in advance includes: If the difference between the indoor temperature and the set temperature is within the first range, the water temperature parameter or the water flow rate parameter is reduced in advance based on the load prediction value and the response time in the simulation results.

5. The control method according to claim 4, wherein, Based on the predicted load value and the response time in the simulation results, the water temperature parameter or the water flow rate parameter is reduced in advance, including: If it is determined that an increase in heat load is needed based on the predicted load value, the water temperature parameter is controlled to decrease the first water temperature based on a first response time corresponding to a first water temperature change value, and a first response time before the predetermined future time; or, the water flow parameter is controlled to decrease the first water flow rate based on a second response time corresponding to a first water flow rate change value, and a second response time before the predetermined future time. If it is determined that no increase in heat load is required based on the load forecast value, the water temperature parameter is controlled to decrease the second water temperature according to the third response time corresponding to the second water temperature change value, and the water flow parameter is controlled to decrease the second water flow rate according to the fourth response time corresponding to the second water flow rate change value, and the water flow rate is controlled to decrease the second water flow rate according to the fourth response time before the future predetermined time.

6. The control method according to claim 3, wherein, Determining whether to adjust at least one of the water temperature and water flow parameters of the radiant air conditioning system in advance also includes: If the difference between the indoor temperature and the set temperature falls within the second range, and if it is determined from the load forecast that no additional heat load is needed, then based on the response time in the simulation results, the water temperature parameter or the water flow rate parameter is reduced in advance; and If it is determined that an increase in heat load is needed based on the predicted load value, then the operating parameters of the radiant air conditioning system shall be maintained.

7. The control method according to claim 6, wherein, Based on the response time in the simulation results, the water temperature parameter or the water flow rate parameter can be reduced in advance, including: Based on the fifth response time corresponding to the third water temperature change value, the water temperature parameter is controlled to decrease the third water temperature at the fifth response time before the future predetermined time; or, based on the sixth response time corresponding to the third water flow change value, the water flow parameter is controlled to decrease the third water flow at the sixth response time before the future predetermined time.

8. The control method according to claim 3, wherein, Determining whether to adjust at least one of the water temperature and water flow parameters of the radiant air conditioning system in advance includes: When the difference between the indoor temperature and the set temperature is within the third range, the operating parameters of the radiant air conditioning system are maintained.

9. The control method according to claim 3, wherein, Determining whether to adjust at least one of the water temperature and water flow parameters of the radiant air conditioning system in advance includes: If the difference between the indoor temperature and the set temperature falls within the fourth interval, and if it is determined that an increase in heat load is needed based on the predicted load value, then the water temperature parameter or the water flow rate parameter is increased in advance based on the response time in the simulation results; and If it is determined based on the load forecast that no increase in heat load is required, then the operating parameters of the radiant air conditioning system shall be maintained.

10. The control method according to claim 9, wherein, Based on the response time in the simulation results, the water temperature parameter or the water flow rate parameter can be increased in advance, including: Based on the seventh response time corresponding to the fourth water temperature change value, the water temperature parameter is controlled to increase the fourth water temperature at the seventh response time before the future predetermined time; or, based on the eighth response time corresponding to the fourth water flow change value, the water flow parameter is controlled to increase the fourth water flow at the eighth response time before the future predetermined time.

11. The control method according to claim 3, wherein, Determining whether to adjust at least one of the water temperature and water flow parameters of the radiant air conditioning system in advance includes: If the difference between the indoor temperature and the set temperature is within the fifth range, the water temperature parameter or the water flow rate parameter is increased in advance based on the load prediction value and the response time in the simulation results.

12. The control method according to claim 11, wherein, Based on the predicted load value and the response time in the simulation results, the water temperature parameter or the water flow rate parameter is increased in advance, including: If it is determined that an increase in heat load is required based on the predicted load value, the water temperature parameter is controlled to increase to the ninth water temperature based on the ninth response time corresponding to the fifth water temperature change value, and at the ninth response time before the predetermined future time; or, the water flow parameter is controlled to increase to the fifth water flow rate based on the tenth response time corresponding to the fifth water flow rate change value, and at the tenth response time before the predetermined future time. If it is determined that no increase in heat load is required based on the load forecast value, the water temperature parameter is controlled to increase the sixth water temperature according to the eleventh response time corresponding to the sixth water temperature change value, and the eleventh response time is before the future predetermined time. Alternatively, the water flow parameter is controlled to increase the sixth water flow rate according to the twelfth response time corresponding to the sixth water flow rate change value, and the twelfth response time is before the future predetermined time.

13. The control method according to claim 2, wherein, Based on the outdoor temperature, determine whether to prioritize adjusting the water temperature parameter or the water flow parameter.

14. The control method according to claim 1, wherein, When the radiant air conditioning system is in cooling mode, the parameter change value includes at least one of the water flow rate change value and the fan frequency change value, and the operating parameter includes at least one of the fan frequency parameter and the water flow rate parameter of the pipeline. Controlling the operating parameters of the radiant air conditioning system includes: Based on the control strategy corresponding to the temperature difference range in the cooling mode, the load prediction value, and the simulation results, determine whether to adjust at least one of the fan frequency parameter and water flow parameter of the radiant air conditioning system in advance.

15. The control method according to claim 14, wherein, The temperature difference range includes a sixth range, a seventh range, an eighth range, a ninth range, and a tenth range. The lower limit of the temperature in the sixth range is greater than the upper limit of the temperature in the seventh range, the lower limit of the temperature in the seventh range is greater than the upper limit of the temperature in the eighth range, the lower limit of the temperature in the eighth range is greater than the upper limit of the temperature in the ninth range, and the lower limit of the temperature in the ninth range is greater than the upper limit of the temperature in the tenth range. The set temperature is located within the eighth range.

16. The control method according to claim 15, wherein, Determine whether to adjust at least one of the fan frequency parameters and water flow parameters of the radiant air conditioning system in advance, including: If the difference between the indoor temperature and the set temperature is within the sixth interval, the water flow rate parameter or the fan frequency parameter is increased in advance based on the load prediction value and the response time in the simulation results.

17. The control method according to claim 15, wherein, Based on the load forecast and the response time in the simulation results, the water flow parameter or the fan frequency parameter is increased in advance, including: If it is determined based on the load forecast that no increase in cooling load is required, the water flow parameter is controlled to increase the seventh water flow rate based on the thirteenth response time corresponding to the seventh flow rate change value, which is the thirteenth response time before the predetermined future time; and If it is determined that an increase in cooling load is required based on the load forecast value, and if the required increase in cooling load is greater than the first threshold, then the water flow parameter is controlled to increase the eighth water flow rate according to the fourteenth response time corresponding to the eighth water flow rate change value, at the fourteenth response time before the future predetermined time. If the required increase in cooling load is less than or equal to the first threshold, then the fan frequency parameter is controlled to increase the first fan frequency according to the fifteenth response time corresponding to the first fan frequency change value, at the fifteenth response time before the future predetermined time.

18. The control method according to claim 15, wherein, Determine whether to adjust at least one of the fan frequency parameters and water flow parameters of the radiant air conditioning system in advance, including: If the difference between the indoor temperature and the set temperature falls within the seventh interval, and if it is determined that an increase in cooling load is needed based on the load forecast, then the water flow rate parameter or the fan frequency parameter is increased in advance based on the response time in the simulation results; and If it is determined based on the load forecast that no increase in cooling load is required, then the operating parameters of the radiant air conditioning system shall be maintained.

19. The control method according to claim 18, wherein, Based on the response time in the simulation results, the water flow rate parameter or the fan frequency parameter can be increased in advance, including: If the required increase in cooling load is determined to be greater than the second threshold based on the load forecast, then the water flow parameter is controlled to increase the ninth water flow rate at the sixteenth response time corresponding to the ninth water flow rate change value, sixteenth response time before the predetermined future time; and If the required increase in cooling load is determined to be less than or equal to the second threshold based on the load forecast value, the fan frequency parameter is controlled to increase the second fan frequency based on the seventeenth response time corresponding to the second fan frequency change value, within the seventeenth response time before the predetermined future time.

20. The control method according to claim 15, wherein, Determine whether to adjust at least one of the fan frequency parameters and water flow parameters of the radiant air conditioning system in advance, including: When the difference between the indoor temperature and the set temperature is within the eighth range, the operating parameters of the radiant air conditioning system are maintained.

21. The control method according to claim 15, wherein, Determine whether to adjust at least one of the fan frequency parameters and water flow parameters of the radiant air conditioning system in advance, including: If the difference between the indoor temperature and the set temperature falls within the ninth interval, and if it is determined based on the load forecast that an increase in cooling load is needed, then based on the response time in the simulation results, the water flow rate parameter or the fan frequency parameter is increased in advance; and If it is determined based on the load forecast that no increase in cooling load is required, then the operating parameters of the radiant air conditioning system shall be maintained.

22. The control method according to claim 21, wherein, Based on the response time in the simulation results, the water flow rate parameter or the fan frequency parameter can be increased in advance, including: If the required increase in cooling load is determined to be greater than the third threshold based on the load forecast, then the water flow parameter is controlled to increase the tenth water flow rate at the eighteenth response time corresponding to the tenth water flow rate change value, at the eighteenth response time before the predetermined future time; and If the required increase in cooling load is determined to be less than or equal to the third threshold based on the load forecast value, the fan frequency parameter is controlled to increase the frequency of the third fan based on the nineteenth response time corresponding to the change value of the third fan frequency, at the nineteenth response time before the predetermined future time.

23. The control method according to claim 15, wherein, Determine whether to adjust at least one of the fan frequency parameters and water flow parameters of the radiant air conditioning system in advance, including: If the difference between the indoor temperature and the set temperature is within the tenth interval, the water flow parameter or the fan frequency parameter is reduced in advance based on the load prediction value and the response time in the simulation results.

24. The control method according to claim 23, wherein, Based on the load forecast and the response time in the simulation results, the water flow parameter or the fan frequency parameter is reduced in advance, including: If it is determined based on the load forecast that no increase in cooling load is required, the water flow parameter is controlled to reduce the eleventh water flow rate based on the twentieth response time corresponding to the eleventh water flow rate change, within the twentieth response time before the predetermined future time; and If it is determined that an increase in cooling load is required based on the load forecast value, and if the required increase in cooling load is greater than the fourth threshold, then the fan frequency parameter is controlled to decrease the fourth fan frequency based on the twenty-first response time corresponding to the fourth fan frequency change value, within the twenty-first response time before the predetermined future time. If the required increase in cooling load is less than or equal to the fourth threshold, then the fan frequency parameter is controlled to decrease the fifth fan frequency based on the twenty-second response time corresponding to the fifth fan frequency change value, within the twenty-second response time before the predetermined future time.

25. The control method according to any one of claims 1 to 24, further comprising: When the radiant air conditioning system is in heating mode, the indoor humidity is adjusted by the humidity control module of the fresh air system based on the difference between the indoor relative humidity and the set indoor relative humidity.

26. The control method according to claim 25, wherein, The indoor humidity is adjusted using the humidity control module based on the difference between the indoor relative humidity and the set indoor relative humidity value, including: If the difference between the indoor relative humidity and the set indoor relative humidity value is greater than a first humidity threshold, the indoor humidity is reduced; and If the difference between the indoor relative humidity and the set indoor relative humidity is less than a first humidity threshold, the indoor humidity is increased.

27. The control method according to any one of claims 1 to 24, further comprising: When the radiant air conditioning system is in cooling mode, the indoor humidity is adjusted by the humidity control module of the fresh air system based on the relationship between the indoor relative humidity and the indoor relative humidity setpoint, and the relationship between the indoor air dew point temperature and the dew point temperature setpoint.

28. The control method according to claim 27, wherein, Based on the relationship between indoor relative humidity and the indoor relative humidity setpoint, and the relationship between indoor air dew point temperature and the dew point temperature setpoint, the humidity control module is used to adjust indoor humidity, including: If either the indoor relative humidity is greater than the indoor relative humidity set value or the indoor air dew point temperature is greater than the dew point temperature set value, the humidity control module is used to reduce the indoor humidity.

29. The control method according to claim 27, wherein, When at least one of the parameters is increased (water flow rate and fan frequency), the indoor humidity is adjusted using the humidity control module based on the relationship between indoor relative humidity and indoor relative humidity setpoint, and the relationship between indoor air dew point temperature and dew point temperature setpoint.

30. A control device for a radiant air conditioning system, comprising: The data acquisition module is configured to acquire the dataset required for load forecasting. The forecasting module is configured to forecast load values ​​for a predetermined future time based on the dataset required for load forecasting. The simulation module is configured to input the load prediction value and the set temperature into the thermal inertia simulation model to obtain simulation results, wherein the simulation results include the parameter change values ​​of the radiant air conditioning system and the corresponding response time required for the controlled indoor temperature to meet the set temperature; The calculation module is configured to determine a corresponding temperature difference range based on the difference between the indoor temperature and the set temperature in the operating mode, wherein the operating mode includes a heating mode or a cooling mode; and The control module is configured to control the operating parameters of the radiant air conditioning system according to the control strategy corresponding to the temperature difference range in the operating mode, the load prediction value, and the simulation results.

31. A control device for a radiant air conditioning system, comprising: Memory; as well as A processor coupled to the memory, the processor being configured to execute the control method of the radiant air conditioning system as described in any one of claims 1 to 29 based on instructions stored in the memory.

32. A radiant air conditioning system, comprising: The control device for the radiant air conditioning system according to any one of claims 30 to 31.

33. A computer-readable storage medium having stored thereon computer program instructions that, when executed by a processor, implement the control method of the radiant air conditioning system according to any one of claims 1 to 29.

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