Anti-condensation control method, fresh air radiation air conditioning system and storage medium

Abstract

The application provides a condensation prevention control method, a fresh air radiation air conditioning system and a storage medium. The method comprises the following steps: entering a refrigeration mode; obtaining relative humidity in all refrigeration rooms using a refrigeration function; when it is confirmed that there is a condensation risk according to the relative humidity in all refrigeration rooms, controlling the opening degree of a first valve, a second valve, a third valve and a corresponding air valve of all refrigeration rooms to perform a dehumidification operation; and when the relative humidity in all refrigeration rooms is less than a first preset relative humidity, opening the first valve and closing the second valve to perform refrigeration on all refrigeration rooms. The condensation prevention control method can effectively avoid condensation in a room when the fresh air radiation air conditioning system is running.

Description

Technical Field

[0001] This invention relates to the field of air conditioning control technology, specifically to an anti-condensation control method for a fresh air radiant air conditioning system, a fresh air radiant air conditioning system using the anti-condensation control method of the fresh air radiant air conditioning system, and a computer-readable storage medium using the anti-condensation control method of the fresh air radiant air conditioning system. Background Technology

[0002] With the continuous improvement of production technology and the increasing demands of users, users' requirements for air conditioning comfort are also gradually increasing. Fresh air radiant air conditioning systems are gradually being promoted and applied due to their advantages such as radiant cooling, uniform indoor temperature distribution, and the absence of drafts.

[0003] However, in the existing control methods of fresh air radiant air conditioning systems, the fresh air system and the radiant system mostly work independently, which cannot achieve comfortable adjustment and effectively prevent condensation. Furthermore, it cannot reasonably adjust to meet the needs of multiple rooms with different humidity levels or different adjustment targets.

[0004] Therefore, it is necessary to consider more optimized control methods for fresh air radiant air conditioning systems. Summary of the Invention

[0005] The primary objective of this invention is to provide an anti-condensation control method for a fresh air radiant air conditioning system that can effectively prevent condensation.

[0006] The second objective of this invention is to provide a fresh air radiant air conditioning system that can effectively prevent condensation.

[0007] A third objective of this invention is to provide a computer-readable storage medium that can effectively prevent condensation.

[0008] To achieve the aforementioned first objective, the anti-condensation control method for a fresh air radiant air conditioning system provided by the present invention includes: entering a cooling mode; acquiring the relative humidity of all cooling rooms currently using the cooling function; when it is confirmed that there is a risk of condensation based on the relative humidity of all cooling rooms, controlling the opening of the first valve, the second valve, the third valve, and the corresponding air valves of all cooling rooms to perform dehumidification operation; when the relative humidity of all cooling rooms is less than a first preset relative humidity, opening the first valve and closing the second valve to cool all cooling rooms.

[0009] As can be seen from the above scheme, the anti-condensation control method of the fresh air radiant air conditioning system of the present invention first confirms whether there is a risk of condensation based on the relative humidity of all refrigerated rooms when entering the cooling mode. If there is a risk of condensation, dehumidification is performed first to make the relative humidity of all refrigerated rooms less than the first preset relative humidity before cooling is performed, thereby effectively preventing condensation.

[0010] In a further scheme, when the relative humidity of any room in all the refrigerated rooms is greater than or equal to the first preset relative humidity, or when the relative humidity of any refrigerated room is greater than the second preset relative humidity, then the risk of condensation is confirmed, wherein the second preset relative humidity is greater than the first preset relative humidity.

[0011] Therefore, if the relative humidity of a room is greater than or equal to the first preset relative humidity, it indicates that the humidity in the refrigerated rooms is generally high, posing a risk of condensation. If the relative humidity of any refrigerated room is greater than the second preset relative humidity, then the humidity in that room is high, posing a risk of condensation.

[0012] In a further scheme, the steps for dehumidification operation by controlling the opening of the first valve, the second valve, the third valve, and the corresponding air valves of all refrigerated rooms include: controlling the first valve to be closed, the second valve and the third valve to be fully open, and controlling the opening of the air valve according to the relative humidity of each refrigerated room. The higher the relative humidity in the refrigerated room, the higher the opening of the air valve in that refrigerated room.

[0013] Therefore, by controlling the opening of the air valve according to the relative humidity of each cooling room, the air valve can be reasonably adjusted to meet the dehumidification needs of different rooms.

[0014] In a further scheme, the step of controlling the opening degree of the air valve according to the relative humidity of each cooling room includes: adjusting the air valve corresponding to the cooling room with a relative humidity greater than or equal to the first preset relative humidity to the maximum opening degree, and controlling the air valve corresponding to the remaining cooling rooms with the preset air valve opening degree, wherein the preset air valve opening degree is less than the maximum opening degree; gradually reducing the opening degree of the air valve corresponding to the remaining cooling rooms until the relative humidity of all cooling rooms is less than the first preset relative humidity.

[0015] Therefore, adjusting the air valves corresponding to the refrigerated rooms with relative humidity greater than or equal to the first preset relative humidity to their maximum opening, and controlling the air valves corresponding to the remaining refrigerated rooms with the preset air valve opening, can accelerate the dehumidification efficiency of the refrigerated rooms with high relative humidity. Simultaneously, gradually reducing the opening of the air valves corresponding to the remaining refrigerated rooms until the relative humidity of all refrigerated rooms is less than the first preset relative humidity can further accelerate the dehumidification efficiency of the refrigerated rooms with high relative humidity.

[0016] In a further embodiment, when cooling all the rooms, the method also includes controlling the opening of the third valve and the corresponding air valves of all the rooms to control humidity, so that the relative humidity of all the rooms is less than the first preset relative humidity.

[0017] Therefore, when cooling all rooms, controlling the relative humidity of all rooms to be lower than the first preset relative humidity by using the opening of the third valve and the corresponding air valve of each room can effectively prevent condensation.

[0018] In a further embodiment, the step of controlling humidity by controlling the opening of the third valve and the corresponding air valves of all refrigerated rooms includes: obtaining the initial opening of the third valve during refrigeration, and controlling the third valve with the initial opening; if the relative humidity of all refrigerated rooms is less than the first preset relative humidity, then maintaining the current opening of each valve and each air valve; if the requirement that the relative humidity of all refrigerated rooms is less than the first preset relative humidity is not met, then gradually increasing the opening of the third valve and / or decreasing the opening of the air valves corresponding to the refrigerated rooms with relative humidity less than the first preset relative humidity.

[0019] Therefore, if the relative humidity of all refrigerated rooms is lower than the first preset relative humidity, it means that the relative humidity of the refrigerated rooms meets the requirements for preventing condensation, and the current opening degree of each valve can be maintained. If the requirement that the relative humidity of all refrigerated rooms is lower than the first preset relative humidity is not met, the opening degree of the third valve can be increased and / or the opening degree of the air valve corresponding to the refrigerated room with a relative humidity lower than the first preset relative humidity can be decreased to further increase the dehumidification effect.

[0020] In a further embodiment, after obtaining the relative humidity of all refrigerated rooms currently using the refrigeration function, the method further includes: when it is confirmed that there is no risk of condensation based on the relative humidity of all refrigerated rooms, opening the first valve and closing the second valve to refrigerate all refrigerated rooms.

[0021] Therefore, if there is no risk of condensation, the cooling system can be turned on directly.

[0022] In a further embodiment, each room's radiant system input is equipped with a radiant control valve for controlling refrigerant flow. When cooling all rooms, the system also includes: acquiring the current indoor temperature, current wall temperature, and indoor dew point temperature in the room, and controlling the opening of the corresponding radiant control valve in the room based on the current indoor temperature, current wall temperature, and indoor dew point temperature, so that the current wall temperature is greater than the indoor dew point temperature.

[0023] Therefore, when cooling all rooms, the opening of the corresponding radiation control valve of the cooling room can be controlled according to the current indoor temperature, the current wall temperature, and the indoor dew point temperature, so that the current wall temperature is higher than the indoor dew point temperature, thus avoiding condensation caused by excessively low wall temperature.

[0024] In a further embodiment, the step of controlling the opening of the radiation control valve corresponding to the cooling room based on the current indoor temperature, the current wall temperature, and the indoor dew point temperature includes: when the current wall temperature is greater than or equal to the sum of the indoor dew point temperature and a first preset deviation value, and the current wall temperature is less than or equal to the sum of the indoor dew point temperature and a second preset deviation value, the amount of reduction in the opening of the radiation control valve is determined based on the current indoor temperature, the current wall temperature, the current relative humidity, and the current water flow rate of the radiation control valve in the cooling room, and the opening of the radiation control valve is controlled based on the amount of reduction in the opening, wherein the second preset deviation value is greater than the first preset deviation value.

[0025] Therefore, when the current wall temperature is greater than or equal to the sum of the indoor dew point temperature and the first preset deviation value, and the current wall temperature is less than or equal to the sum of the indoor dew point temperature and the second preset deviation value, it indicates that the wall temperature is too low and needs to be adjusted. Adjusting the opening of the radiation control valve based on the current indoor temperature, current wall temperature, current relative humidity, and current water flow rate of the radiation control valve in the refrigerated room can improve control accuracy.

[0026] In a further embodiment, the step of controlling the opening of the radiation control valve corresponding to the cooling room based on the current indoor temperature, the current wall temperature, and the indoor dew point temperature also includes: when the current wall temperature is greater than the sum of the indoor dew point temperature and the second preset deviation value, if the indoor temperature change value within a preset time period is greater than or equal to the preset temperature change value, the opening of the radiation control valve is controlled by reducing the opening amount.

[0027] Therefore, if the current wall temperature meets the requirements for preventing condensation, and the indoor temperature change is greater than or equal to the preset temperature change value, it indicates that the temperature is dropping too fast and the rate of temperature drop needs to be adjusted. Thus, the opening of the radiation control valve is controlled by reducing the opening amount.

[0028] In a further embodiment, after obtaining the indoor temperature change value within a preset time period, the method further includes: if the indoor temperature change value is less than the preset temperature change value and the current indoor temperature is outside the preset temperature range, the opening degree of the radiation control valve is determined and adjusted based on the current indoor temperature, the set temperature of the cooling room, and the current water flow rate of the radiation control valve.

[0029] Therefore, if the current indoor temperature is outside the preset temperature range, it indicates that the indoor temperature has not reached the set temperature requirement. Thus, it is necessary to adjust the opening of the radiant control valve. Determining the opening of the radiant control valve based on the current indoor temperature, the set temperature of the cooled room, and the current water flow rate of the radiant control valve can improve control accuracy.

[0030] To achieve the second objective of the present invention, the present invention provides a fresh air radiant air conditioning system including a processor and a memory, wherein the memory stores a computer program, and when the computer program is executed by the processor, it implements the steps of the above-described anti-condensation control method for the fresh air radiant air conditioning system.

[0031] To achieve the third objective of the present invention, the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a controller, implements the steps of the above-described anti-condensation control method for a fresh air radiant air conditioning system. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of a fresh air radiant air conditioning system that applies the anti-condensation control method of the present invention.

[0033] Figure 2 This is a flowchart of an embodiment of the anti-condensation control method for the fresh air radiant air conditioning system of the present invention.

[0034] Figure 3 This is a flowchart illustrating the steps of controlling the opening degree of the air valve according to the relative humidity of each refrigerated room in an embodiment of the anti-condensation control method for the fresh air radiant air conditioning system of the present invention.

[0035] Figure 4 This is a flowchart of the steps for controlling humidity by controlling the opening degree of the third valve and the corresponding air valves of all refrigerated rooms in an embodiment of the anti-condensation control method for the new air radiant air conditioning system of the present invention.

[0036] Figure 5 This is a flowchart illustrating the steps in the embodiment of the anti-condensation control method for the fresh air radiant air conditioning system of the present invention, which involves controlling the opening degree of the radiant control valve corresponding to the cooling room based on the current indoor temperature, the current wall temperature, and the indoor dew point temperature.

[0037] The present invention will be further described below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0038] The anti-condensation control method for a fresh air radiant air conditioning system of the present invention is a computer program applied to the fresh air radiant air conditioning system for anti-condensation control.

[0039] In this embodiment, as Figure 1 As shown, the fresh air radiant air conditioning system includes a centralized cold source 1, a fresh air unit 2 with dehumidification function, a plate heat exchanger 3, and multiple room radiant systems 4. The surface cooler 22 in the fresh air unit 2 and the primary side of the plate heat exchanger 3 are connected in parallel to the cooling circuit of the centralized cold source 1, and the multiple room radiant systems 4 are connected in parallel to the secondary side of the plate heat exchanger 3. The fresh air unit 2 supplies fresh air to the room where each room radiant system 4 is located.

[0040] The fresh air radiant air conditioning system also includes a first water pump 5, a first valve 6, a second valve 7, a third valve 8, and a second water pump 9. The first water pump 5 is located at the output end of the centralized cold source 1, and provides constant-temperature chilled water to the fresh air unit 2 and the plate heat exchanger 3. The first valve 6 is connected in series at the primary side input end of the plate heat exchanger 3, and the second valve 7 is connected in parallel at both the primary side input end and the primary side output end of the plate heat exchanger 3. The fresh air unit 2 includes a fan 21, a surface cooler 22, an air outlet 23, and a temperature and humidity sensor 24 for detecting outdoor temperature and humidity. The fan 21 blows outdoor air onto the surface cooler 22 for dehumidification, and the dehumidified air is blown out through the air outlet 23, which is connected to the fresh air inlet (not shown) of each room. The fresh air unit 2 is equipped with a damper (not shown) to control the fresh air volume of each room. The third valve 8 is connected in series at the refrigerant input end of the surface cooler 22. The second water pump 9 is connected in series at the secondary side input end of the plate heat exchanger 3.

[0041] Each of the room radiant systems 4 is equipped with a radiant control valve 10 at its input end to control the refrigerant flow. The second water pump 9 continuously circulates the refrigerant in the room radiant system 4, and the radiant control valve 10 in each room controls the refrigerant flow of the individual room radiant system 4 to regulate the cooling capacity of the room.

[0042] In addition, the fresh air radiant air conditioning system is also equipped with a temperature and humidity sensor 11 for detecting the temperature and humidity of each room, and a temperature sensor 12 for detecting the wall temperature of each room.

[0043] Example of an anti-condensation control method for a fresh air radiant air conditioning system:

[0044] See Figure 2 In this embodiment, the anti-condensation control method for the fresh air radiant air conditioning system first executes step S1 to enter the cooling mode. When cooling is required, it can be controlled via a control panel or remote control. Operating parameters can be set via the control panel or remote control, and a command to enter the cooling mode can be sent to the fresh air radiant air conditioning system.

[0045] After entering cooling mode, step S2 is executed to obtain the relative humidity of all cooling rooms currently using the cooling function. To avoid excessive humidity in the cooling rooms, which could lead to condensation, the humidity in all cooling rooms needs to be detected. The relative humidity of the cooling rooms can be obtained through the temperature and humidity sensor 11.

[0046] After obtaining the relative humidity of all cooling rooms currently using the cooling function, proceed to step S3 to determine whether the risk of condensation exists based on the relative humidity of all cooling rooms.

[0047] In this embodiment, a condensation risk is confirmed when the relative humidity of any room in the cooling system that exceeds a preset proportion is greater than or equal to a first preset relative humidity, or when the relative humidity of any cooling room exceeds a second preset relative humidity. The second preset relative humidity is greater than the first preset relative humidity. The preset proportion, the first preset relative humidity, and the second preset relative humidity can be preset based on experimental data. The presence of rooms with a relative humidity greater than or equal to the first preset relative humidity indicates that the humidity in the cooling rooms is generally high, posing a condensation risk. Furthermore, if the relative humidity of any cooling room exceeds the second preset relative humidity, then that room has high humidity and poses a condensation risk.

[0048] If a condensation risk is confirmed based on the relative humidity of all refrigerated rooms, step S4 is executed to control the opening of the first valve 6, the second valve 7, the third valve 8, and the corresponding air valves in all refrigerated rooms to perform dehumidification. The confirmed condensation risk indicates high humidity in the refrigerated rooms, making them prone to condensation; therefore, dehumidification is necessary. Dehumidified fresh air is blown into the refrigerated rooms through the fresh air unit 2, thus dehumidifying the rooms.

[0049] In this embodiment, the steps for dehumidifying by controlling the opening of the first valve 6, the second valve 7, the third valve 8, and the corresponding air valves of all refrigerated rooms include: closing the first valve 6, fully opening the second valve 7 and the third valve 8, and controlling the opening of the air valves according to the relative humidity of each refrigerated room; the higher the relative humidity in a refrigerated room, the larger the opening of the air valve in that room. By controlling the opening of the air valves according to the relative humidity of each refrigerated room, the air valves can be adjusted reasonably to meet the dehumidification needs of different rooms.

[0050] In this embodiment, see Figure 3 When controlling the opening of the air valves according to the relative humidity of each refrigerated room, step S21 is executed first. The air valves corresponding to the refrigerated rooms with a relative humidity greater than or equal to a first preset relative humidity are adjusted to their maximum opening. The preset air valve opening is then used to control the air valves corresponding to the remaining refrigerated rooms, with the preset air valve opening being less than the maximum opening. The preset air valve opening can be pre-set based on experimental data. By adjusting the air valves corresponding to the refrigerated rooms with a relative humidity greater than or equal to the first preset relative humidity to their maximum opening, and using the preset air valve opening to control the air valves corresponding to the remaining refrigerated rooms, the dehumidification efficiency for refrigerated rooms with higher relative humidity can be accelerated.

[0051] Next, step S22 is executed, gradually reducing the opening of the air valves corresponding to the remaining refrigerated rooms until the relative humidity of all refrigerated rooms is lower than the first preset relative humidity. When gradually reducing the opening of the air valves corresponding to the remaining refrigerated rooms, a preset range can be set to gradually reduce the opening. After each reduction in the air valve opening, a waiting period is performed before the next relative humidity measurement. By gradually reducing the opening of the air valves corresponding to the remaining refrigerated rooms until the relative humidity of all refrigerated rooms is lower than the first preset relative humidity, the dehumidification efficiency of refrigerated rooms with high relative humidity can be further accelerated.

[0052] After dehumidification, proceed to step S5 to determine if the relative humidity of all refrigerated rooms is lower than the first preset relative humidity. To ensure that the humidity in the refrigerated rooms does not easily cause condensation, it is necessary to ensure that the relative humidity of all refrigerated rooms is lower than the first preset relative humidity.

[0053] If the relative humidity of all refrigerated rooms is not lower than the first preset relative humidity, proceed to step S4 to continue dehumidification. When the relative humidity of all refrigerated rooms is lower than the first preset relative humidity, proceed to step S6, opening the first valve 6 and closing the second valve 7 to refrigerate all refrigerated rooms. After dehumidification is complete, condensation is less likely to occur, and refrigeration can begin. When refrigerating all refrigerated rooms, the first valve 6 is opened at a preset initial opening degree, which can be preset based on experimental data.

[0054] In this embodiment, when cooling all the refrigerated rooms, the method further includes: controlling the opening degree of the third valve 8 and the corresponding air valves of all the refrigerated rooms to control humidity, so that the relative humidity of all the refrigerated rooms is less than the first preset relative humidity. By controlling the opening degree of the third valve 8 and the corresponding air valves of all the refrigerated rooms to ensure that the relative humidity of all the refrigerated rooms is less than the first preset relative humidity when cooling all the refrigerated rooms, condensation can be effectively avoided during cooling.

[0055] In this embodiment, see Figure 4 When controlling humidity by controlling the opening of the third valve 8 and the corresponding air valves of all refrigerated rooms, step S31 is first executed to obtain the initial opening of the third valve 8 during refrigeration, and the third valve 8 is controlled by the initial opening. In order to reasonably control the dehumidification effect of the fresh air device 2 to meet the humidity control requirements of multiple refrigerated rooms, it is necessary to obtain the initial opening to control the third valve 8.

[0056] In this embodiment, when obtaining the initial opening degree of the third valve 8 during refrigeration, the required humidity content d of the supply air for each refrigerated room is calculated. 送风 Taking the first room as an example, d 送风1 =d 目标 1-W / (ρ∙qm If the total required supply air humidity for all refrigerated rooms is d, then... 送风总 =d 送风1 ∙ξ1+d 送风2 ∙ξ2+……d 送风N ∙ξ N / N, the opening degree of the third valve 8 is K. B =f(d 室外 ,d 送风总 ,qm), K B =f(d 室外 ,d 送风总 ,q m ) indicates that it can be accessed via d 室外 d 送风总 and q m The corresponding K is obtained by looking up the three parameters in a table. B Where W is the indoor moisture load, which can be calculated based on the load, ρ is the air density, and d 室外 The outdoor air humidity content can be derived from the outdoor ambient temperature and humidity conditions. m For the unit's air volume, d 目标 The target indoor humidity level can be calculated from the set indoor temperature and humidity conditions. ξ1, ξ2, ..., ξ N The correction parameters are sorted according to the actual humidity status of each refrigerated room. The larger the humidity, the larger the ξ, and the formula is ξ1 + ξ2 + ... + ξ. N =1.

[0057] After controlling the third valve 8 with the initial opening degree, step S32 is executed to determine whether the relative humidity of all refrigerated rooms is less than the first preset relative humidity.

[0058] If the relative humidity of all refrigerated rooms is lower than the first preset relative humidity, then step S33 is executed to maintain the current opening of each valve and each air valve. If the relative humidity of all refrigerated rooms is lower than the first preset relative humidity, it means that the relative humidity of the refrigerated rooms meets the requirements for preventing condensation, and the current opening of each valve and each air valve can be maintained.

[0059] If the relative humidity of all refrigerated rooms is not lower than the first preset relative humidity, then step S34 is executed, gradually increasing the opening of the third valve 8 and / or decreasing the opening of the air valves corresponding to the refrigerated rooms with relative humidity lower than the first preset relative humidity. By increasing the opening of the third valve 8 and / or decreasing the opening of the air valves corresponding to the refrigerated rooms with relative humidity lower than the first preset relative humidity, the dehumidification effect is further increased. In this embodiment, when gradually increasing the opening of the third valve 8 and / or decreasing the opening of the air valves corresponding to the refrigerated rooms with relative humidity lower than the first preset relative humidity, it is first determined whether the opening of the third valve 8 is at its maximum opening. If not, the opening of the third valve 8 is increased. If the opening of the third valve 8 is at its maximum opening, the opening of the air valves corresponding to the refrigerated rooms with relative humidity lower than the first preset relative humidity is decreased until the air valve opening reaches the minimum air valve opening.

[0060] After executing step S2, which obtains the relative humidity of all refrigerated rooms currently using the cooling function, if it is confirmed that there is no risk of condensation based on the relative humidity of all refrigerated rooms, step S6 is executed to open the first valve 6 and close the second valve 7 to cool all refrigerated rooms. If there is no risk of condensation, cooling can be started directly. At this time, while cooling all refrigerated rooms, the initial opening degree of the third valve 8 during cooling is obtained, and the third valve 8 is controlled with the initial opening degree. At the same time, the air valves corresponding to the refrigerated rooms with relative humidity greater than or equal to the first preset relative humidity are adjusted to the maximum opening degree, and the air valves corresponding to the remaining refrigerated rooms are controlled with the preset air valve opening degree. During the cooling process, the opening degree of the third valve 8 and the corresponding air valves of all refrigerated rooms are further controlled to control humidity, so that the relative humidity of all refrigerated rooms is less than the first preset relative humidity.

[0061] In this embodiment, when cooling all the rooms, the method further includes: acquiring the current indoor temperature, current wall temperature, and indoor dew point temperature of the room; and controlling the opening degree of the radiation control valve 10 corresponding to the room based on the current indoor temperature, current wall temperature, and indoor dew point temperature, so that the current wall temperature is higher than the indoor dew point temperature. When cooling all the rooms, the opening degree of the radiation control valve 10 corresponding to the room can be controlled based on the current indoor temperature, current wall temperature, and indoor dew point temperature to ensure that the current wall temperature is higher than the indoor dew point temperature, thus preventing condensation caused by excessively low wall temperatures.

[0062] In this embodiment, see Figure 5 When controlling the opening degree of the radiation control valve 10 corresponding to the cooling room based on the current indoor temperature, current wall temperature, and indoor dew point temperature, step S41 is executed first to control the opening degree of the radiation control valve with a first preset opening degree. The first preset opening degree can be preset based on experimental data.

[0063] After controlling the opening of the radiation control valve with the first preset opening degree, step S42 is executed to determine whether the current wall temperature is greater than or equal to the sum of the indoor dew point temperature and the first preset deviation value. The first preset deviation value can be preset based on experimental data; preferably, the first preset deviation value is 3℃. The indoor dew point temperature is the dew point temperature corresponding to the indoor dry-bulb and wet-bulb temperatures.

[0064] If the current wall temperature is less than the sum of the indoor dew point temperature and the first preset deviation value, then step S43 is executed to close the radiation control valve 10. The fact that the current wall temperature is less than the sum of the indoor dew point temperature and the first preset deviation value indicates that the current wall temperature is too low and is prone to condensation. Therefore, the radiation control valve 10 is closed to prevent the current wall temperature from decreasing further.

[0065] When the current wall temperature is greater than or equal to the sum of the indoor dew point temperature and the first preset deviation value, step S44 is executed to determine whether the current wall temperature is less than or equal to the sum of the indoor dew point temperature and the second preset deviation value. The second preset deviation value can be preset based on experimental data, and the second preset deviation value is greater than the first preset deviation value.

[0066] If the current wall temperature is less than or equal to the sum of the indoor dew point temperature and the second preset deviation value, step S45 is executed. The amount of reduction in the opening of the radiation control valve 10 is determined based on the current indoor temperature, current wall temperature, current relative humidity, and current water flow rate of the radiation control valve 10. The opening of the radiation control valve 10 is then controlled according to this reduction. When the current wall temperature is greater than or equal to the sum of the indoor dew point temperature and the first preset deviation value, and less than or equal to the sum of the indoor dew point temperature and the second preset deviation value, it indicates that the wall temperature is low and needs adjustment. Adjusting the opening of the radiation control valve 10 based on the current indoor temperature, current wall temperature, current relative humidity, and current water flow rate of the radiation control valve 10 improves control accuracy.

[0067] When determining the reduction in the opening of the radiation control valve 10 based on the current indoor temperature, current wall temperature, current relative humidity, and current water flow rate of the radiation control valve 10, the calculated water flow rate (m) of the radiation control valve 10 is obtained by referring to a table. 计N The opening degree of the radiation control valve 10 is K. N =z N ∙m 计N +y N , z N y N This is a correction factor.

[0068] When the current wall temperature is greater than the sum of the indoor dew point temperature and the second preset deviation value, step S46 is executed to determine whether the indoor temperature change value within a preset time period is greater than or equal to the preset temperature change value. The preset time period and preset temperature change value can be preset based on experimental data.

[0069] If the indoor temperature change within the preset time period is greater than or equal to the preset temperature change value, then step S47 is executed to control the opening of the radiation control valve 10 by reducing the opening amount. When the current wall temperature meets the requirements for preventing condensation, if the indoor temperature change is greater than or equal to the preset temperature change value, it indicates that the temperature is dropping too quickly and the rate of temperature drop needs to be adjusted. Therefore, the opening of the radiation control valve 10 is controlled by reducing the opening amount.

[0070] If the change in indoor temperature is less than the preset temperature change value, then step S48 is executed to determine whether the current indoor temperature is within the preset temperature range. The preset temperature range can be determined based on the set temperature.

[0071] If the current indoor temperature is within the preset temperature range, then proceed to step S49 to maintain the current opening of the radiant control valve. The fact that the current indoor temperature is within the preset temperature range indicates that the current opening meets the temperature control requirements and can be maintained.

[0072] If the current indoor temperature is outside the preset temperature range, step S50 is executed. The opening degree of the radiation control valve 10 is determined and adjusted based on the current indoor temperature, the set temperature of the cooled room, and the current water flow rate of the radiation control valve 10. When the current indoor temperature is outside the preset temperature range, it indicates that the indoor temperature has not reached the set temperature requirement; therefore, the opening degree of the radiation control valve 10 needs to be adjusted. Determining the opening degree of the radiation control valve 10 based on the current indoor temperature, the set temperature of the cooled room, and the current water flow rate of the radiation control valve 10 improves control accuracy.

[0073] In this embodiment, when determining the opening degree of the radiation control valve 10 based on the current indoor temperature, the set temperature of the cooling room, and the current water flow rate of the radiation control valve 10, the target water flow rate m of the radiation control valve 10 is obtained by looking up a table based on the current indoor temperature, the set temperature of the cooling room, and the current water flow rate of the radiation control valve 10. 目标N The opening degree of the radiation control valve 10 is K. N =z N ∙m 目标N +y N , z N y N This is a correction factor.

[0074] As can be seen from the above, the anti-condensation control method of the new air radiant air conditioning system of the present invention first confirms whether there is a risk of condensation based on the relative humidity of all refrigerated rooms when entering the cooling mode. If there is a risk of condensation, dehumidification is performed first to make the relative humidity of all refrigerated rooms less than the first preset relative humidity before cooling is performed, thereby effectively preventing condensation.

[0075] Example of a fresh air radiant air conditioning system:

[0076] The fresh air radiant air conditioning system in this embodiment includes a controller, which executes the steps in the above embodiment of the anti-condensation control method for the fresh air radiant air conditioning system when executing a computer program.

[0077] For example, a computer program can be divided into one or more modules, one or more of which are stored in memory and executed by a controller to complete the present invention. One or more modules can be a series of computer program instruction segments capable of performing a specific function, which describe the execution process of the computer program in a fresh air radiant air conditioning system.

[0078] A fresh air radiant air conditioning system may include, but is not limited to, a controller and a memory. Those skilled in the art will understand that a fresh air radiant air conditioning system may include more or fewer components, or a combination of certain components, or different components; for example, a fresh air radiant air conditioning system may also include input / output devices, network access devices, buses, etc.

[0079] For example, the controller can be a Central Processing Unit (CPU), or other general-purpose controllers, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose controller can be a microcontroller or any conventional controller. The controller is the control center of the fresh air radiant air conditioning system, connecting all parts of the system via various interfaces and lines.

[0080] The memory can be used to store computer programs and / or modules. The controller implements various functions of the fresh air radiant air conditioning system by running or executing the computer programs and / or modules stored in the memory, and by calling the data stored in the memory. For example, the memory may mainly include a program storage area and a data storage area. The program storage area may store the operating system, at least one application program required for a function (such as sound receiving function, sound to text conversion function, etc.), etc.; the data storage area may store data created based on the use of the mobile phone (such as audio data, text data, etc.). In addition, the memory may include high-speed random access memory, and may also include non-volatile memory, such as hard disk, RAM, plug-in hard disk, SmartMediaCard (SMC), Secure Digital (SD) card, FlashCard, at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0081] Examples of computer-readable storage media:

[0082] If the modules integrated in the fresh air radiant air conditioning system of the above embodiments are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the above embodiments of the anti-condensation control method for the fresh air radiant air conditioning system can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by the controller, it can implement the steps of the above embodiments of the anti-condensation control method for the fresh air radiant air conditioning system. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The storage medium can include: any entity or device capable of carrying computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc. It should be noted that the content contained in computer-readable media may be appropriately added to or subtracted from the requirements of legislation and patent practice in a jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media may not include electrical carrier signals and telecommunication signals.

[0083] It should be noted that the above are only preferred embodiments of the present invention, but the design concept of the invention is not limited thereto. Any non-substantial modifications made to the present invention using this concept also fall within the protection scope of the present invention.

Claims

1. A method for preventing condensation in a fresh air radiant air conditioning system, the fresh air radiant air conditioning system comprising a centralized cold source, a fresh air device with dehumidification function, a plate heat exchanger, and multiple room radiant systems, wherein the surface cooler of the fresh air device and the primary side of the plate heat exchanger are connected in parallel to the cooling circuit of the centralized cold source, and the multiple room radiant systems are connected in parallel to the secondary side of the plate heat exchanger; the fresh air device supplies fresh air to each room containing a room radiant system; characterized in that, The fresh air radiant air conditioning system also includes a first valve, a second valve and a third valve. The first valve is connected in series to the primary side input end of the plate heat exchanger, the second valve is connected in parallel to the primary side input end and the primary side output end of the plate heat exchanger, and the third valve is connected in series to the refrigerant input end of the surface cooler. The fresh air device is equipped with a damper to control the fresh air volume of each room. The method includes: Enter cooling mode; Get the relative humidity in all rooms currently using the cooling function; When a risk of condensation is confirmed based on the relative humidity in all the refrigerated rooms, dehumidification operation is performed by controlling the opening of the first valve, the second valve, the third valve, and the corresponding air valves of all the refrigerated rooms. When the relative humidity of all the cooling rooms is less than the first preset relative humidity, the first valve is opened and the second valve is closed to cool all the cooling rooms. The step of controlling the opening of the first valve, the second valve, the third valve, and the corresponding air valves of all the refrigeration rooms to perform dehumidification operation includes: controlling the first valve to close, making the second valve and the third valve at their maximum opening, and controlling the opening of the air valve according to the relative humidity of each refrigeration room. The higher the relative humidity in the refrigeration room, the higher the opening of the air valve in that refrigeration room. The step of controlling the opening degree of the air valve according to the relative humidity of each of the refrigerated rooms includes: adjusting the air valve corresponding to the refrigerated room with a relative humidity greater than or equal to the first preset relative humidity to the maximum opening degree, and controlling the air valve corresponding to the remaining refrigerated rooms with the preset air valve opening degree, wherein the preset air valve opening degree is less than the maximum opening degree; gradually reducing the opening degree of the air valve corresponding to the remaining refrigerated rooms until the relative humidity of all the refrigerated rooms is less than the first preset relative humidity.

2. The method for preventing condensation in a fresh air radiant air conditioning system according to claim 1, characterized in that: When the relative humidity of any of the refrigerated rooms is greater than or equal to the first preset relative humidity, or when the relative humidity of any of the refrigerated rooms is greater than the second preset relative humidity, then a risk of condensation is confirmed, wherein the second preset relative humidity is greater than the first preset relative humidity.

3. The method for preventing condensation control in a fresh air radiant air conditioning system according to claim 1 or 2, characterized in that: When cooling all of the aforementioned rooms, the method further includes: Humidity is controlled by adjusting the opening of the third valve and the corresponding air valves of all the refrigerated rooms, so that the relative humidity of all the refrigerated rooms is less than the first preset relative humidity.

4. The anti-condensation control method for a fresh air radiant air conditioning system according to claim 3, characterized in that: The steps for humidity control by controlling the opening of the third valve and the corresponding air valves of all the refrigerated rooms include: Obtain the initial opening degree of the third valve during refrigeration, and control the third valve with the initial opening degree; If the relative humidity of all the refrigerated rooms is less than the first preset relative humidity, then maintain the current opening of each valve and each air valve; If the relative humidity of all the refrigerated rooms is not lower than the first preset relative humidity, then the opening of the third valve is gradually increased and / or the opening of the air valve corresponding to the refrigerated room whose relative humidity is lower than the first preset relative humidity is gradually decreased.

5. The method for preventing condensation control in a fresh air radiant air conditioning system according to claim 1 or 2, characterized in that: After obtaining the relative humidity in all cooled rooms currently using the cooling function, the process also includes: Once it is confirmed that there is no risk of condensation based on the relative humidity in all the refrigerated rooms, the first valve is opened and the second valve is closed to refrigerate all the refrigerated rooms.

6. The method for preventing condensation control in a fresh air radiant air conditioning system according to claim 1 or 2, characterized in that: Each of the room's radiant systems is equipped with a radiant control valve at its input end for controlling the refrigerant flow. When cooling all of the aforementioned rooms, the method further includes: The system acquires the current indoor temperature, current wall temperature, and indoor dew point temperature in the refrigerated room. Based on these three temperatures, the system controls the opening of the radiation control valve corresponding to the refrigerated room, ensuring that the current wall temperature is greater than the indoor dew point temperature.

7. The method for preventing condensation control in a fresh air radiant air conditioning system according to claim 6, characterized in that: The steps for controlling the opening degree of the radiation control valve corresponding to the cooling room based on the current indoor temperature, the current wall temperature, and the indoor dew point temperature include: When the current wall temperature is greater than or equal to the sum of the indoor dew point temperature and the first preset deviation value, and the current wall temperature is less than or equal to the sum of the indoor dew point temperature and the second preset deviation value, the amount of reduction in the opening of the radiation control valve is determined based on the current indoor temperature, the current wall temperature, the current relative humidity, and the current water flow rate of the radiation control valve in the refrigerated room. The opening of the radiation control valve is controlled based on the amount of reduction in the opening, wherein the second preset deviation value is greater than the first preset deviation value.

8. The method for preventing condensation control in a fresh air radiant air conditioning system according to claim 7, characterized in that: The step of controlling the opening degree of the radiation control valve corresponding to the cooling room based on the current indoor temperature, the current wall temperature, and the indoor dew point temperature further includes: When the current wall temperature is greater than the sum of the indoor dew point temperature and the second preset deviation value, it is determined whether the indoor temperature change value within the preset time period is greater than or equal to the preset temperature change value; if the indoor temperature change value within the preset time period is greater than or equal to the preset temperature change value, the opening degree of the radiation control valve is controlled by the reduction in opening degree.

9. The method for preventing condensation in a fresh air radiant air conditioning system according to claim 8, characterized in that: Also includes: If the change in indoor temperature is less than the preset change in temperature, and the current indoor temperature is outside the preset temperature range, the opening degree of the radiation control valve is determined and adjusted based on the current indoor temperature, the set temperature of the cooling room, and the current water flow rate of the radiation control valve.

10. A fresh air radiant air conditioning system, comprising a processor and a memory, characterized in that: The memory stores a computer program, which, when executed by the processor, implements the steps of the anti-condensation control method for the fresh air radiant air conditioning system as described in any one of claims 1 to 9.

11. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by the controller, it implements the steps of the anti-condensation control method for the fresh air radiant air conditioning system as described in any one of claims 1 to 9.

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