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

Abstract

The invention provides an anti-condensation control method, a fresh air radiation air conditioning system and a storage medium. The method comprises the steps that a refrigeration mode is started; the relative humidity of all the refrigeration rooms currently using the refrigeration function is obtained; when it is confirmed that the condensation risk exists according to the relative humidity in all the refrigeration rooms, the opening degrees of a first valve, a second valve, a third valve and air valves corresponding to all the refrigeration rooms are controlled to conduct dehumidification operation; and when the relative humidity of all the refrigeration rooms is smaller than the first preset relative humidity, the first valve is opened, the second valve is closed, and all the refrigeration rooms are refrigerated. By means of the anti-condensation control method, indoor condensation can be effectively avoided when the fresh air radiation air conditioning system operates.

Description

Technical Field

[0001] The present invention relates to the field of air conditioning control technology, and specifically, to an anti-condensation control method for a fresh air radiation air conditioning system, a fresh air radiation air conditioning system applying the anti-condensation control method for a fresh air radiation air conditioning system, and a computer-readable storage medium applying the anti-condensation control method for a fresh air radiation air conditioning system. Background Art

[0002] With the continuous improvement of production technology and the continuous growth of user demand, users' requirements for air conditioning comfort are gradually increasing. Fresh air radiation air conditioning system has been gradually promoted and applied due to its advantages such as radiation cooling, uniform indoor temperature distribution, and no blowing feeling.

[0003] However, in the existing control methods of fresh air radiation air-conditioning systems, the fresh air system and the radiation system mostly work separately, which cannot achieve comfort adjustment and effectively prevent condensation. In addition, when the humidity in multiple rooms is different or the adjustment targets are different, it is impossible to reasonably adjust to meet the needs of multiple rooms.

[0004] Therefore, it is necessary to consider a more optimized control method for the fresh air radiation air conditioning system. Summary of the invention

[0005] The first object of the present invention is to provide an anti-condensation control method for a fresh air radiation air conditioning system which can effectively avoid condensation.

[0006] A second object of the present invention is to provide a fresh air radiation air conditioning system that can effectively avoid condensation.

[0007] A third object of the present invention is to provide a computer-readable storage medium that can effectively avoid condensation.

[0008] In order to achieve the above-mentioned first purpose, the anti-condensation control method of the fresh air radiation air-conditioning system provided by the present invention includes: entering the refrigeration mode; obtaining the relative humidity in all refrigeration rooms currently using the refrigeration function; when it is confirmed that there is a condensation risk based on the relative humidity in all refrigeration rooms, controlling the opening of the first valve, the second valve, the third valve and the corresponding air valves of all refrigeration rooms to perform dehumidification operations; when the relative humidity of all refrigeration rooms is less than the first preset relative humidity, opening the first valve and closing the second valve to cool all refrigeration rooms.

[0009] It can be seen from the above scheme that the anti-condensation control method of the fresh air radiation air-conditioning system of the present invention, when entering the cooling mode, first confirms whether there is a condensation risk based on the relative humidity in all the refrigeration rooms. If there is a condensation risk, dehumidification operation is performed first. When the relative humidity of all the refrigeration rooms is less than the first preset relative humidity, cooling is performed, thereby effectively preventing condensation.

[0010] In a further solution, when there are rooms with a relative humidity greater than a preset proportion among all refrigerated rooms that is greater than or equal to a first preset relative humidity, or when the relative humidity of any refrigerated room is greater than a second preset relative humidity, it is confirmed that there is a condensation risk, wherein the second preset relative humidity is greater than the first preset relative humidity.

[0011] It can be seen that when the relative humidity of the room greater than the preset ratio is greater than or equal to the first preset relative humidity, it means that the humidity of the refrigerated room is generally high and there is a risk of condensation. When the relative humidity of any refrigerated room is greater than the second preset relative humidity, the humidity of the room is high and there is a risk of condensation.

[0012] In a further scheme, the step of controlling the opening of the first valve, the second valve, the third valve and the corresponding air valves of all refrigeration rooms to perform dehumidification operation includes: controlling the first valve to close, the second valve and the third valve to fully open, and controlling the opening of the air valve according to the relative humidity of each refrigeration room. The greater the relative humidity in the refrigeration room, the greater the opening of the air valve in the refrigeration room.

[0013] It can be seen from this that the opening of the air valve can be controlled according to the relative humidity of each refrigeration room. The air valve can be reasonably adjusted according to the different humidity in each refrigeration room to meet the dehumidification needs of different rooms.

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

[0015] It can be seen that by adjusting the air valves corresponding to the refrigeration rooms with relative humidity greater than or equal to the first preset relative humidity to the maximum opening, and controlling the air valves corresponding to the remaining refrigeration rooms with the preset air valve opening, the dehumidification efficiency of the refrigeration rooms with high relative humidity can be accelerated. At the same time, the opening of the air valves corresponding to the remaining refrigeration rooms is gradually reduced until the relative humidity of all refrigeration rooms is less than the first preset relative humidity, which can further accelerate the dehumidification efficiency of the refrigeration rooms with high relative humidity.

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

[0017] It can be seen that when cooling all refrigeration rooms, the relative humidity of all refrigeration rooms is controlled to be less than the first preset relative humidity by utilizing the opening of the third valve and the corresponding air valves of all refrigeration rooms, which can effectively avoid condensation.

[0018] In a further scheme, the step of controlling the opening of the third valve and the corresponding air valves of all refrigeration rooms to control the humidity 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 refrigeration rooms is less than a first preset relative humidity, maintaining the current opening of each valve and each air valve; if the relative humidity of all refrigeration rooms is not less than the first preset relative humidity, gradually increasing the opening of the third valve and / or reducing the opening of the air valve corresponding to the refrigeration room whose relative humidity is less than the first preset relative humidity.

[0019] It can be seen that if the relative humidity of all refrigerated rooms is less than the first preset relative humidity, it means that the relative humidity of the refrigerated rooms meets the anti-condensation requirement and the current opening of each valve can be maintained. If the relative humidity of all refrigerated rooms is not less than the first preset relative humidity, the opening of the third valve can be increased and / or the opening of the air valve corresponding to the refrigerated room with a relative humidity less than the first preset relative humidity can be reduced to further increase the dehumidification strength.

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

[0021] It can be seen from this that when there is no risk of condensation, refrigeration can be turned on directly.

[0022] In a further scheme, the input end of each room radiation system is provided with a radiation control valve for controlling the refrigerant flow; when cooling all refrigerated rooms, it also includes: obtaining the current indoor temperature, the current wall temperature and the indoor dew point temperature in the refrigerated room, and controlling the opening of the radiation control valve corresponding to the refrigerated room according to the current indoor temperature, the current wall temperature and the indoor dew point temperature, so that the current wall temperature is greater than the indoor dew point temperature.

[0023] It can be seen that when cooling all refrigerated rooms, the opening of the radiation control valve corresponding to the refrigerated 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 greater than the indoor dew point temperature, avoiding condensation caused by too low wall temperature.

[0024] In a further scheme, the step of controlling the opening of the radiation control valve corresponding to the refrigeration room according to 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 deviation value, and the current wall temperature is less than or equal to the sum of the indoor dew point temperature and a second deviation value, determining the reduction in the opening of the radiation control valve according to the current indoor temperature, the current wall temperature, the current relative humidity and the current water flow of the radiation control valve in the refrigeration room, and controlling the opening of the radiation control valve according to the reduction in the opening, wherein the second preset deviation value is greater than the first preset deviation value.

[0025] It can be seen that when the current wall temperature is greater than or equal to the sum of the indoor dew point temperature and the first deviation value, and the current wall temperature is less than or equal to the sum of the indoor dew point temperature and the second deviation value, it means that the wall temperature is low and the wall temperature needs to be adjusted. The opening of the radiation control valve can be adjusted according to the current indoor temperature, the current wall temperature, the current relative humidity and the current water flow of the radiation control valve in the refrigeration room to improve the control accuracy.

[0026] In a further scheme, the step of controlling the opening of the radiation control valve corresponding to the refrigeration room according to 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 set deviation 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 of the radiation control valve is controlled by a reduction in the opening amount.

[0027] It can be seen that when the current wall temperature meets the anti-condensation requirements, if the indoor temperature change value is greater than or equal to the preset temperature change value, it means that the temperature drops too fast and the temperature drop rate needs to be adjusted. Therefore, the opening of the radiation control valve is controlled by the opening reduction amount.

[0028] In a further scheme, after the step of obtaining the indoor temperature change value within a preset time period, it also 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 of the radiation control valve is determined and adjusted according to the current indoor temperature, the set temperature of the refrigeration room and the current water flow of the radiation control valve.

[0029] It can be seen that when the current indoor temperature is outside the preset temperature range, it means that the indoor temperature has not reached the set temperature requirement. Therefore, it is necessary to control the opening of the radiation control valve for adjustment. The opening of the radiation control valve is determined according to the current indoor temperature, the set temperature of the refrigeration room and the current water flow of the radiation control valve, which can improve the control accuracy.

[0030] In order to achieve the second purpose of the present invention, the present invention provides a fresh air radiation air conditioning system including a processor and a memory, the memory stores a computer program, and when the computer program is executed by the processor, the steps of the anti-condensation control method of the above-mentioned fresh air radiation air conditioning system are implemented.

[0031] In order to achieve the third purpose of the present invention, the present invention provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a controller, the steps of the anti-condensation control method of the fresh air radiation air-conditioning system are implemented. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of a fresh air radiation air conditioning system to which the anti-condensation control method of the fresh air radiation air conditioning system of the present invention is applied.

[0033] Figure 2 It is a flow chart of an embodiment of the anti-condensation control method of the fresh air radiation air conditioning system of the present invention.

[0034] Figure 3 It is a flow chart of the steps of controlling the opening of the air valve according to the relative humidity of each refrigeration room in the embodiment of the anti-condensation control method of the fresh air radiation air conditioning system of the present invention.

[0035] Figure 4 It is a flow chart of the steps of controlling the opening of the third valve and the corresponding air valves of all refrigeration rooms to control humidity in the embodiment of the anti-condensation control method of the fresh air radiation air conditioning system of the present invention.

[0036] Figure 5 It is a flow chart of the steps of controlling the opening degree of the radiation control valve corresponding to the refrigeration room according to the current indoor temperature, the current wall temperature and the indoor dew point temperature in the embodiment of the anti-condensation control method of the fresh air radiation air conditioning system of the present invention.

[0037] The present invention is further described below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0038] The anti-condensation control method of the fresh air radiation air conditioning system of the present invention is a computer program applied to the fresh air radiation air conditioning system, and is used to perform anti-condensation control on the fresh air radiation air conditioning system.

[0039] In this embodiment, Figure 1 As shown, the fresh air radiation air-conditioning system includes a centralized cold source 1, a fresh air device 2 with a dehumidification function, a plate heat exchanger 3 and a plurality of room radiation systems 4. The surface cooler 22 in the fresh air device 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 plurality of room radiation systems 4 are connected in parallel to the secondary side of the plate heat exchanger 3; the fresh air device 2 delivers fresh air to each room where the room radiation system 4 is located.

[0040] The fresh air radiation 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 arranged at the output end of the centralized cold source 1, and the first water pump 5 provides constant temperature cold water to the fresh air device 2 and the plate heat exchanger 3. The first valve 6 is connected in series to the primary side input end of the plate heat exchanger 3, and the second valve 7 is connected in parallel to the primary side input end and the primary side output end of the plate heat exchanger 3. The fresh air device 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 is used to blow outdoor air to the surface cooler 22 for dehumidification, and the dehumidified air is blown out through the air outlet 23, and the air outlet 23 is connected to the fresh air inlet (not shown) of each room. The fresh air device 2 is provided with an air valve (not shown) for controlling the fresh air volume of each room. The third valve 8 is connected in series to the refrigerant input end of the surface cooler 22. The second water pump 9 is connected in series to the secondary side input end of the plate heat exchanger 3.

[0041] The input end of each of the room radiation systems 4 is provided with a radiation control valve 10 for controlling the flow of the refrigerant. The second water pump 9 causes the refrigerant in the room radiation system 4 to circulate continuously, and the radiation control valve 10 in each room controls the refrigerant flow of the single room radiation system 4 to achieve the regulation of the cooling capacity in the room.

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

[0043] Embodiment of the anti-condensation control method for fresh air radiation air conditioning system:

[0044] See also Figure 2 In this embodiment, when the anti-condensation control method of the fresh air radiation air conditioning system is working, step S1 is first executed to enter the cooling mode. When cooling is required, control can be performed through the control panel or remote control, and operating parameters can be set through the control panel or remote control, and a command to enter the cooling mode is sent to the fresh air radiation air conditioning system.

[0045] After entering the cooling mode, step S2 is executed to obtain the relative humidity in all the cooling rooms currently using the cooling function. In order to avoid condensation caused by excessive humidity in the cooling room, the humidity in all the cooling rooms needs to be detected. The relative humidity in the cooling room can be obtained by the temperature and humidity sensor 11.

[0046] After the relative humidity in all refrigeration rooms currently using the refrigeration function is obtained, step S3 is performed to determine whether the risk of condensation exists based on the relative humidity in all refrigeration rooms.

[0047] In this embodiment, when there are rooms with a relative humidity greater than or equal to the first preset relative humidity in all refrigerated rooms that are greater than a preset ratio, or when the relative humidity of any refrigerated room is greater than the second preset relative humidity, it is confirmed that there is a condensation risk, wherein the second preset relative humidity is greater than the first preset relative humidity. The preset ratio, the first preset relative humidity, and the second preset relative humidity can be preset according to experimental data. When there are rooms with a relative humidity greater than the preset ratio that are greater than or equal to the first preset relative humidity, it means that the humidity of the refrigerated rooms is generally high and there is a condensation risk. And when the relative humidity of any refrigerated room is greater than the second preset relative humidity, the humidity of the room is high and there is a condensation risk.

[0048] When the relative humidity in all refrigeration rooms confirms that there is a risk of condensation, 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 of all refrigeration rooms to perform a dehumidification operation. If the risk of condensation is confirmed, it means that the humidity in the refrigeration room is high and condensation is easy to occur. Therefore, a dehumidification operation needs to be performed first. The dehumidified fresh air is blown into the refrigeration room through the fresh air device 2, thereby playing the role of dehumidifying the refrigeration room.

[0049] In this embodiment, the step of controlling the opening of the first valve 6, the second valve 7, the third valve 8 and the corresponding air valves of all refrigeration rooms to perform a dehumidification operation includes: controlling the first valve 6 to be closed, the second valve 7 and the third valve 8 to be fully open, and controlling the opening of the air valve according to the relative humidity of each refrigeration room. The greater the relative humidity in the refrigeration room, the greater the opening of the air valve in the refrigeration room. According to the relative humidity of each refrigeration room, the opening of the air valve is controlled accordingly, and the air valve can be reasonably adjusted according to the different humidity of each refrigeration room to meet the dehumidification needs of different rooms.

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

[0051] Next, step S22 is executed to gradually reduce the opening of the air valves corresponding to the remaining refrigeration rooms until the relative humidity of all refrigeration rooms is less than the first preset relative humidity. When gradually reducing the opening of the air valves corresponding to the remaining refrigeration rooms, the opening of the air valves can be gradually reduced by setting a preset amplitude, and each time the opening of the air valve is reduced, the next relative humidity detection is performed after waiting for a period of time. By gradually reducing the opening of the air valves corresponding to the remaining refrigeration rooms until the relative humidity of all refrigeration rooms is less than the first preset relative humidity, the dehumidification efficiency of the refrigeration rooms with higher relative humidity can be further accelerated.

[0052] After the dehumidification operation is performed, step S5 is executed to determine whether the relative humidity of all refrigerated rooms is less than the first preset relative humidity. In order to ensure that the humidity of the refrigerated rooms is not prone to condensation, it is necessary to ensure that the relative humidity of all refrigerated rooms is less than the first preset relative humidity.

[0053] If the relative humidity of all refrigerated rooms is not less than the first preset relative humidity, then step S4 is continued to be executed to continue the dehumidification operation. When the relative humidity of all refrigerated rooms is less than the first preset relative humidity, step S6 is executed to open the first valve 6 and close the second valve 7 to refrigerate all refrigerated rooms. After dehumidification is completed, condensation is not likely to occur at this time, and refrigeration can be started. When refrigerating all refrigerated rooms, the first valve 6 is controlled to be opened with a preset initial opening, and the preset initial opening can be preset according to experimental data.

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

[0055] In this embodiment, see Figure 4 When controlling the opening of the third valve 8 and the corresponding air valves of all refrigeration rooms for humidity control, firstly execute step S31 to obtain the initial opening of the third valve 8 during refrigeration, and control the third valve 8 with 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 refrigeration 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 cooling, the required air supply humidity content d of each cooling room is calculated. 送风 , taking the first room as an example, d 送风1 =d 目标 1-W / (ρ·qm ), then the total required air humidity content of all refrigerated rooms is d 送风总 =d 送风1 ·ξ1+d 送风2 ·ξ2+……d 送风N ·ξ N / N, the opening 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 室外 ,d 送风总 and q m The three parameters are looked up in the table to obtain the corresponding K B Where W is the indoor humidity load, which can be calculated based on the load, ρ is the air density, d 室外 is the outdoor air humidity, which can be obtained based on the outdoor ambient temperature and humidity. m is the air volume of the unit, d 目标 is the indoor target humidity content, which can be calculated from the indoor set temperature and humidity state. ξ1, ξ2…ξ N is the correction parameter sorted according to the actual humidity status of each refrigeration room. The greater the humidity, the greater the ξ, ξ1+ξ2+…+ξ N =1.

[0057] After the third valve 8 is controlled with the initial opening, 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 less than the first preset relative humidity, 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 less than the first preset relative humidity, it means that the relative humidity of the refrigerated rooms meets the anti-condensation requirement and the current opening of each valve and each air valve can be maintained.

[0059] If the relative humidity of all refrigeration rooms is not less than the first preset relative humidity, step S34 is executed to gradually increase the opening of the third valve 8 and / or reduce the opening of the air valve corresponding to the refrigeration room with a relative humidity less than the first preset relative humidity. By increasing the opening of the third valve 8 and / or reducing the opening of the air valve corresponding to the refrigeration room with a relative humidity less than the first preset relative humidity, the dehumidification strength is further increased. In this embodiment, when gradually increasing the opening of the third valve 8 and / or reducing the opening of the air valve corresponding to the refrigeration room with a relative humidity less than the first preset relative humidity, it is first determined whether the opening of the third valve 8 is at the maximum opening. If not, the opening of the third valve 8 is increased. If the opening of the third valve 8 is at the maximum opening, the opening of the air valve corresponding to the refrigeration room with a relative humidity less than the first preset relative humidity is reduced until the opening of the air valve reaches the minimum air valve opening.

[0060] After executing step S2 to obtain the relative humidity in all refrigeration rooms currently using the refrigeration function, if it is confirmed that there is no condensation risk based on the relative humidity in all refrigeration rooms, execute step S6 to open the first valve 6 and close the second valve 7 to refrigerate all refrigeration rooms. If there is no condensation risk, the refrigeration can be turned on directly. At this time, when refrigerating all refrigeration rooms, the initial opening of the third valve 8 during refrigeration is obtained, and the third valve 8 is controlled with the initial opening. At the same time, the air valve corresponding to the refrigeration room with a relative humidity greater than or equal to the first preset relative humidity is adjusted to the maximum opening, and the air valve corresponding to the remaining refrigeration rooms is controlled with the preset air valve opening, and the opening of the third valve 8 and the corresponding air valves of all refrigeration rooms are further controlled during the refrigeration process to perform humidity control, so that the relative humidity of all refrigeration rooms is less than the first preset relative humidity.

[0061] In this embodiment, when cooling all refrigerated rooms, it also includes: obtaining the current indoor temperature, the current wall temperature and the indoor dew point temperature in the refrigerated room, and controlling the opening of the radiation control valve 10 corresponding to the refrigerated room according to the current indoor temperature, the current wall temperature and the indoor dew point temperature, so that the current wall temperature is greater than the indoor dew point temperature. When cooling all refrigerated rooms, the opening of the radiation control valve 10 corresponding to the refrigerated 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 greater than the indoor dew point temperature, so as to avoid condensation caused by too low wall temperature.

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

[0063] After the opening of the radiation control valve is controlled with the first preset opening, 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 according to experimental data. Preferably, the first preset deviation value is 3°C. 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, step S43 is executed to close the radiation control valve 10. If the current wall temperature is less than the sum of the indoor dew point temperature and the first preset deviation value, it means that the current wall temperature is too low and condensation is likely to occur. Therefore, the radiation control valve 10 is closed to prevent the current wall temperature from further decreasing.

[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 according to 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 to determine the opening reduction amount of the radiation control valve 10 according to the current indoor temperature in the refrigeration room, the current wall temperature, the current relative humidity and the current water flow of the radiation control valve 10, and the opening of the radiation control valve 10 is controlled according to the opening reduction amount. 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 means that the wall temperature is low and the wall temperature needs to be adjusted. By adjusting the opening of the radiation control valve 10 according to the current indoor temperature in the refrigeration room, the current wall temperature, the current relative humidity and the current water flow of the radiation control valve 10, the control accuracy can be improved.

[0067] When determining the opening reduction amount of the radiation control valve 10 according to the current indoor temperature, the current wall temperature, the current relative humidity and the current water flow of the radiation control valve 10 in the refrigeration room, the calculated water flow m of the radiation control valve 10 is obtained by looking up the table. 计N , the opening of the radiation control valve 10 is K N =z N ·m 计N +y N , z N ,y N is the correction factor.

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

[0069] If the indoor temperature change value within the preset time is greater than or equal to the preset temperature change value, step S47 is executed to control the opening of the radiation control valve 10 by the opening reduction amount. When the current wall temperature meets the anti-condensation requirement, if the indoor temperature change value is greater than or equal to the preset temperature change value, it means that the temperature drops too fast and the temperature drop rate needs to be adjusted. Therefore, the opening of the radiation control valve 10 is controlled by the opening reduction amount.

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

[0071] If the current indoor temperature is within the preset temperature range, step S49 is executed to maintain the current opening of the radiation control valve. If the current indoor temperature is within the preset temperature range, it means 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 to determine the opening of the radiation control valve 10 and adjust it according to the current indoor temperature, the set temperature of the refrigeration room and the current water flow of the radiation control valve 10. When the current indoor temperature is outside the preset temperature range, it means that the indoor temperature does not meet the set temperature requirement, so it is necessary to control the opening of the radiation control valve 10 for adjustment. Determining the opening of the radiation control valve 10 according to the current indoor temperature, the set temperature of the refrigeration room and the current water flow of the radiation control valve 10 can improve the control accuracy.

[0073] In this embodiment, when the opening of the radiation control valve 10 is determined according to the current indoor temperature, the set temperature of the refrigeration room and the current water flow of the radiation control valve 10, the target water flow m of the radiation control valve 10 is obtained by looking up the table according to the current indoor temperature, the set temperature of the refrigeration room and the current water flow of the radiation control valve 10. 目标N , the opening of the radiation control valve 10 is K N =z N ·m 目标N +y N , z N ,y N is the correction factor.

[0074] From the above, it can be seen that the anti-condensation control method of the fresh air radiation air-conditioning system of the present invention, when entering the cooling mode, first confirms whether there is a condensation risk based on the relative humidity in all the refrigeration rooms. If there is a condensation risk, dehumidification operation is performed first, so that the relative humidity of all the refrigeration rooms is less than the first preset relative humidity, and then cooling is performed, thereby effectively preventing condensation.

[0075] Fresh air radiation air conditioning system implementation example:

[0076] The fresh air radiation air conditioning system of this embodiment includes a controller, and when the controller executes a computer program, the steps in the above-mentioned anti-condensation control method embodiment of the fresh air radiation air conditioning system are implemented.

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

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

[0079] For example, the controller may be a central processing unit (CPU), or other general controllers, digital signal controllers (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general controller may be a microcontroller or any conventional controller, etc. The controller is the control center of the fresh air radiation air conditioning system, and uses various interfaces and lines to connect various parts of the entire fresh air radiation air conditioning system.

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

[0081] Computer readable storage medium embodiment:

[0082] If the module integrated in the fresh air radiation air conditioning system of the above embodiment is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the embodiment of the anti-condensation control method of the above fresh air radiation air conditioning system can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by the controller, the steps of the embodiment of the anti-condensation control method of the above fresh air radiation air conditioning system can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The storage medium may include: any entity or device that can carry computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium, etc. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media does not include electrical carrier signals and telecommunications 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, and 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 radiation air conditioning system, the fresh air radiation air conditioning system comprising a centralized cold source, a fresh air device with a dehumidification function, a plate heat exchanger and a plurality of room radiation systems, the surface cooler in 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 a plurality of the room radiation systems are connected in parallel to the secondary side of the plate heat exchanger; the fresh air device delivers fresh air to each room where the room radiation system is located; characterized in that The fresh air radiation air conditioning system further includes a first valve, a second valve and a third valve, wherein 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, the third valve is connected in series to the refrigerant input end of the surface cooler, and the fresh air device is provided with an air valve for controlling the fresh air volume of each room; The method comprises: Enter cooling mode; Get the relative humidity in all cooling rooms currently using the cooling function; When it is confirmed that there is a risk of condensation according to the relative humidity in all the refrigeration rooms, controlling the openings of the first valve, the second valve, the third valve and the corresponding air valves of all the refrigeration rooms to perform a dehumidification operation; When the relative humidity of all the refrigerated rooms is lower than the first preset relative humidity, the first valve is opened and the second valve is closed to refrigerate all the refrigerated rooms.

2. The anti-condensation control method for the fresh air radiation air conditioning system according to claim 1, characterized in that: When there are rooms with a relative humidity greater than a preset proportion among all the refrigerated rooms that 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 a second preset relative humidity, it is confirmed that there is a condensation risk, wherein the second preset relative humidity is greater than the first preset relative humidity.

3. The anti-condensation control method for the fresh air radiation air conditioning system according to claim 1, characterized in that: 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 a dehumidification operation includes: The first valve is controlled to be closed, and the second valve and the third valve are at the maximum opening. The opening of the air valve is controlled according to the relative humidity of each refrigeration room. The higher the relative humidity in the refrigeration room, the larger the opening of the air valve in the refrigeration room.

4. The anti-condensation control method for the fresh air radiation air conditioning system according to claim 3, characterized in that: The step of controlling the opening of the air valve according to the relative humidity of each refrigeration room comprises: Adjusting the air valves corresponding to the refrigeration rooms whose relative humidity is greater than or equal to the first preset relative humidity to the maximum opening, and controlling the air valves corresponding to the remaining refrigeration rooms with the preset air valve opening, wherein the preset air valve opening is less than the maximum opening; The openings of the air valves corresponding to the remaining refrigeration rooms are gradually reduced until the relative humidity of all the refrigeration rooms is less than the first preset relative humidity.

5. The anti-condensation control method for a fresh air radiation air conditioning system according to any one of claims 1 to 4, characterized in that: When cooling all the refrigerated rooms, the method further comprises: The humidity is controlled by controlling the opening of the third valve and the corresponding air valves of all the refrigeration rooms, so that the relative humidity of all the refrigeration rooms is less than the first preset relative humidity.

6. The anti-condensation control method for the fresh air radiation air conditioning system according to claim 5, characterized in that: The step of controlling the opening of the third valve and the corresponding air valves of all the refrigeration rooms to control the humidity includes: Acquire an initial opening degree of the third valve during cooling, 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, maintaining the current opening of each valve and each air valve; If the relative humidity of all the refrigerated rooms is not less than the first preset relative humidity, 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 less than the first preset relative humidity is reduced.

7. The anti-condensation control method for a fresh air radiation air conditioning system according to any one of claims 1 to 4, characterized in that: After the step of obtaining the relative humidity in all cooling rooms currently using the cooling function, it also includes: When it is confirmed that there is no condensation risk according to the relative humidity in all the refrigeration rooms, the first valve is opened and the second valve is closed to cool all the refrigeration rooms.

8. The anti-condensation control method for a fresh air radiation air conditioning system according to any one of claims 1 to 4, characterized in that: Each of the room radiation systems has a radiation control valve at its input for controlling the flow of refrigerant; When cooling all the refrigerated rooms, the method further comprises: The current indoor temperature, the current wall temperature and the indoor dew point temperature in the refrigeration room are obtained, and the opening of the radiation control valve corresponding to the refrigeration room is controlled according to the current indoor temperature, the current wall temperature and the indoor dew point temperature, so that the current wall temperature is greater than the indoor dew point temperature.

9. The anti-condensation control method for the fresh air radiation air conditioning system according to claim 8, characterized in that: The step of controlling the opening of the radiation control valve corresponding to the refrigeration room according to the current indoor temperature, the current wall temperature and the indoor dew point temperature comprises: When the current wall temperature is greater than or equal to the sum of the indoor dew point temperature and a first deviation value, and the current wall temperature is less than or equal to the sum of the indoor dew point temperature and a second deviation value, the reduction in opening of the radiation control valve is determined according to the current indoor temperature in the refrigeration room, the current wall temperature, the current relative humidity and the current water flow of the radiation control valve, and the opening of the radiation control valve is controlled according to the reduction in opening, wherein the second preset deviation value is greater than the first preset deviation value.

10. The anti-condensation control method for the fresh air radiation air conditioning system according to claim 9, characterized in that: The step of controlling the opening of the radiation control valve corresponding to the refrigeration room according to 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 deviation value, if the indoor temperature change value within a preset time period is greater than or equal to a preset temperature change value, the opening of the radiation control valve is controlled by the opening reduction amount.

11. The anti-condensation control method for the fresh air radiation air conditioning system according to claim 10, characterized in that: After the step of obtaining the indoor temperature change value within the preset time, 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 of the radiation control valve is determined and adjusted according to the current indoor temperature, the set temperature of the refrigeration room and the current water flow of the radiation control valve.

12. A fresh air radiation air conditioning system, comprising a processor and a memory, characterized in that: The memory stores a computer program, and when the computer program is executed by the processor, the steps of the anti-condensation control method of the fresh air radiation air-conditioning system according to any one of claims 1 to 11 are implemented.

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

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