Anti-freezing method for air cooling system

Abstract

The invention discloses an anti-freezing method for an air cooling system, and relates to the technical field of air cooling equipment, in particular to the anti-freezing method applied to the air cooling system, the air cooling system comprises N heat dissipation modules, N is a positive integer, and the anti-freezing method comprises the following steps that the air cooling system is controlled to conduct environment temperature monitoring, and the current environment temperature t0 of the air cooling system is continuously obtained; the temperature t0 is controlled to be compared with a set temperature t, if the temperature t0 is smaller than or equal to t, a set heat dissipation module is controlled to execute a first operation, and if the temperature t0 is larger than t, the heat dissipation module is controlled to execute a second operation; according to the anti-freezing method for the air cooling system, the environment temperature in the air cooling system is monitored so as to control different heat dissipation modules of the air cooling system to cyclically adjust the heat dissipation power, on the premise that the heat dissipation effect is guaranteed, the problem of pipe bundle frost cracking caused by too low local temperature is avoided, and then normal operation of an indirect cooling unit is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of air cooling equipment, and more specifically, to an anti-freezing method for an air cooling system. Background Art

[0002] An indirect air cooling system cools circulating water through air and then uses the cooled circulating water to cool the main equipment (such as the exhaust steam of a steam turbine). Its core lies in using a shell-and-tube heat exchanger to isolate the cooling medium (circulating water) from the medium to be cooled (such as steam) to avoid direct contact. The system mainly consists of an air cooling tower, a heat exchanger, a circulating water pump, and a fan.

[0003] The working process of an indirect air cooling system is roughly divided into four stages:

[0004] In the heat exchange stage, the high-temperature water vapor (also known as exhaust steam) discharged from the steam turbine enters the condenser and exchanges heat with the circulating water. The exhaust steam transfers heat to the circulating water and condenses into water itself, which returns to the boiler for recycling;

[0005] In the circulating water heating stage, the circulating water with increased temperature after absorbing heat is transported to the air cooling tower by the circulating water pump;

[0006] In the air cooling stage, in the indirect air cooling tower, the circulating water exchanges heat with the cooling air in the cross-flow finned tube bundles on the left and right heat dissipation surfaces of the cooling triangle. The fan forces the air to flow and takes away the heat in the circulating water, reducing its temperature;

[0007] In the circulating water return stage, the cooled circulating water returns to the condenser again to continue absorbing the heat of the exhaust steam, forming a closed cycle.

[0008] The indirect air cooling system has many advantages. For example, the water resource consumption is significantly reduced compared with the direct cooling system, which is very suitable for water-scarce areas; it does not directly discharge hot water, reducing thermal pollution.

[0009] In an indirect air cooling tower, there are multiple actuators in one sector. According to different specific projects, one actuator can control the shutters of one cooling triangle, or can control the shutters of two or more cooling triangles. In the actual control process, the opening degrees of the shutters of all cooling triangles in the same sector are kept consistent. After a long time, the temperature of the cooling triangle will continue to decrease, which may lead to problems such as too low local temperature and freezing of the tube bundles, affecting the normal operation of the indirect cooling unit.

[0010] In summary, how to solve the problem that after the air cooling tower operates for a long time, the temperature of the cooling triangle continues to decrease, resulting in too low local temperature and freezing of the tube bundles, affecting the normal operation of the indirect cooling unit, is an urgent problem to be solved by those skilled in the art at present. Summary of the Invention

[0011] In view of this, the object of the present invention is to provide an anti-freezing method for an air-cooling system, which monitors the ambient temperature inside the air-cooling system to control the adjustment of the heat dissipation power of different heat dissipation modules in the air-cooling system in a circulating manner, and on the premise of ensuring the heat dissipation effect, avoids the problem of tube bundle cracking caused by too low local temperature, thereby ensuring the normal operation of the indirect air-cooled unit.

[0012] To achieve the above object, the present invention provides the following technical solutions:

[0013] An anti-freezing method for an air-cooling system, which is applied to the air-cooling system. The air-cooling system includes N heat dissipation modules, and N is a positive integer. The anti-freezing method includes:

[0014] Controlling the air-cooling system to perform ambient temperature monitoring, and continuously obtaining the current ambient temperature t0 of the air-cooling system;

[0015] Judging whether the ambient temperature t0 is greater than the set temperature t;

[0016] If it is, then control all heat dissipation modules to perform the second operation, and return to the step of controlling the air-cooling system to perform ambient temperature monitoring;

[0017] If not, then control the preset heat dissipation module to perform the first operation, and continuously execute for a duration of T0. After the first operation ends, while performing the second operation, control the next heat dissipation module as the current heat dissipation module for control, and return to the step of controlling the heat dissipation module to perform the first operation; until the temperature t0 > t, return to the step of controlling the air-cooling system to perform ambient temperature monitoring.

[0018] Preferably,

[0019] If not, then control the preset heat dissipation module to perform the first operation, and continuously execute for a duration of T0. After the first operation ends, while performing the second operation, control the next heat dissipation module as the current heat dissipation module for control, and return to the step of controlling the heat dissipation module to perform the first operation; until the temperature t0 > t, return to the step of controlling the air-cooling system to perform ambient temperature monitoring, including:

[0020] During the execution of the first operation, judge whether the ambient temperature t0 is greater than the set temperature t;

[0021] If it is, then end the execution of the first operation, and return to the step of controlling the heat dissipation module to perform the second operation;

[0022] If not, then continuously execute the first operation for a duration of T0. After the first operation ends, while performing the second operation, control the next heat dissipation module as the current heat dissipation module for control, and return to the step of controlling the heat dissipation module to perform the first operation.

[0023] Preferably,

[0024] If so, end the execution of the first operation, and return to the step of controlling the heat dissipation module to execute the second operation, including:

[0025] Judge whether the actual execution duration Tx of the first operation is greater than the set time Ts;

[0026] If so, keep the preset heat dissipation module unchanged;

[0027] If not, use the currently controlled heat dissipation module as the preset heat dissipation module.

[0028] Preferably,

[0029] Judge whether the actual execution duration Tx of the first operation is greater than the set duration Ts, including:

[0030] The duration Ts includes Ts1 and Ts2;

[0031] Judge whether the duration Tx is greater than Ts2;

[0032] If so, keep the preset heat dissipation module unchanged;

[0033] If not, judge whether the duration Tx is less than Ts1;

[0034] If so, use the currently controlled heat dissipation module as the preset heat dissipation module;

[0035] If not, keep the preset heat dissipation module unchanged or use the currently controlled heat dissipation module as the preset heat dissipation module.

[0036] Preferably, Ts is a fixed value or a variable value related to the current ambient air temperature;

[0037] Or Ts1 and Ts2 are fixed values or variable values related to the current ambient air temperature.

[0038] Preferably,

[0039] Judge whether the ambient temperature t0 is greater than the set temperature t, including:

[0040] The temperature t includes t1 and t2, and t1 < t2;

[0041] Judge whether the ambient temperature t0 is greater than t2;

[0042] If so, control all heat dissipation modules to execute the second operation, and return to the step of controlling the air-cooling system to monitor the ambient temperature;

[0043] If not, judge whether the ambient temperature t0 is less than t1;

[0044] If it is yes, control the preset heat dissipation module to perform the first operation for a duration of T0. After the first operation ends and while performing the second operation, control the next heat dissipation module as the current heat dissipation module and return to the step of controlling the heat dissipation module to perform the first operation; until the temperature t0 > t2, return to the step of controlling the air-cooling system to monitor the ambient temperature.

[0045] If it is no, control the current heat dissipation module to maintain the ongoing operation until the ambient temperature t0 is greater than t2 or the ambient temperature t0 is less than t1.

[0046] Preferably, the first operation includes:

[0047] Control the air-cooling system to monitor the current heat dissipation module and continuously obtain the parameter P0 of the current heat dissipation module.

[0048] Judge whether the control parameter P0 is greater than the set parameter P.

[0049] If it is yes, control P0 to decrease to P.

[0050] If it is no, control P0 to be adjusted to 0.

[0051] The second operation includes:

[0052] Control the parameter P0 to resume to the initial value or remain unchanged at the initial value.

[0053] Preferably,

[0054] Judging whether the control parameter P0 is greater than the set parameter P includes:

[0055] The parameter P includes Pt1 and Pt2, where Pt1 < Pt2;

[0056] Judge whether the parameter P0 is greater than Pt2;

[0057] If it is yes, control P0 to be adjusted to P0 - Pt1;

[0058] If it is no, judge whether the parameter P0 is less than Pt1;

[0059] If it is yes, control P0 to be adjusted to 0;

[0060] If it is no, control P0 to be adjusted to Pt1.

[0061] Preferably, the P is a fixed value or a variable value related to the current ambient air temperature;

[0062] Or Pt1 and Pt2 are fixed values or variable values related to the current ambient air temperature.

[0063] Preferably, the parameter P includes at least one of the opening amount of the heat dissipation window in the air-cooling system and the operating power of the heat dissipation fan.

[0064] The anti-freezing method for the air-cooling system provided by the present invention has at least the following beneficial effects compared with the prior art:

[0065] By regulating different heat dissipation modules in the air-cooling system in sequence to change their heat dissipation efficiency, on the premise of ensuring the overall heat dissipation efficiency of the air-cooling system, the problem of tube bundle cracking caused by too low temperature at local positions is avoided, thereby improving the winter anti-freezing ability of the air-cooling system and being beneficial to the realization of the economic goals of the power plant. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0067] Figure 1 It is a schematic diagram of the anti-freezing method for the air-cooling system provided by the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0068] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0069] The core of the present invention is to provide an anti-freezing method for an air-cooling system. By monitoring the ambient temperature in the air-cooling system, the heat dissipation power of different heat dissipation modules of the air-cooling system is adjusted in a cycle, and on the premise of ensuring the heat dissipation effect, the problem of tube bundle cracking caused by too low local temperature is avoided, thereby ensuring the normal operation of the indirect air-cooled unit.

[0070] As Figure 1 shown, an anti-freezing method for an air-cooling system is applied to the air-cooling system. The air-cooling system includes N heat dissipation modules, where N is a positive integer. The anti-freezing method includes:

[0071] Controlling the air-cooling system to perform ambient temperature monitoring, and continuously obtaining the current ambient temperature t0 of the air-cooling system;

[0072] Judging whether the ambient temperature t0 is greater than the set temperature t;

[0073] If yes, all the heat dissipation modules are controlled to perform the second operation, and the process returns to the step of controlling the air cooling system to perform ambient temperature monitoring;

[0074] If not, the preset heat dissipation module is controlled to perform the first operation, and the execution time is T0. After the first operation is completed, the second operation is performed, and the next heat dissipation module is controlled as the current heat dissipation module, and the step of controlling the heat dissipation module to perform the first operation is returned; until the temperature t0>t, the step of controlling the air cooling system to monitor the ambient temperature is returned.

[0075] like Figure 1 As shown, firstly, the ambient temperature in the air cooling system is monitored in real time, and the current ambient temperature t0 in the air cooling system is continuously obtained to determine whether an antifreeze method needs to be implemented to minimize the impact on the heat dissipation effect of the air cooling system and reduce the overall energy consumption of the equipment;

[0076] When the current ambient temperature t0 is lower than the set temperature t, it indicates that there is a risk of the tube bundle freezing and cracking. At this time, the heat dissipation module set in the air cooling system is controlled to perform the first operation, and when the execution time of the first operation reaches the set time T0, the first operation is stopped and the second operation is performed instead. At the same time, the heat dissipation module is replaced to continue to perform the above steps until the current ambient temperature in the air cooling system is higher than the set temperature t. At this time, there is no risk of the tube bundle freezing and cracking, and the antifreeze method can be stopped. However, the ambient temperature monitoring in the air cooling system is still continued. When the ambient temperature t0 in the air cooling system is lower than the set temperature t again, the antifreeze method is implemented again.

[0077] The first operation is mainly to improve the ambient temperature of the corresponding position by changing the heat dissipation efficiency of the local heat dissipation module, and the second operation is mainly to restore or maintain the heat dissipation efficiency of the heat dissipation module at the corresponding position at the original heat dissipation efficiency to reduce the impact on the overall heat dissipation efficiency of the air cooling system.

[0078] When the antifreeze method is implemented, different heat dissipation modules are continuously implemented in turn until the current ambient temperature in the air cooling system is higher than the set temperature t, thereby effectively reducing the impact on the overall heat dissipation efficiency of the air cooling system and avoiding freezing and cracking of the tube bundle caused by local low temperature.

[0079] In some embodiments, if the answer is no, the preset heat dissipation module is controlled to perform the first operation, and the execution time is T0. After the first operation is completed, the second operation is performed, and the next heat dissipation module is controlled as the current heat dissipation module, and the step of controlling the heat dissipation module to perform the first operation is returned; until the temperature t0>t, the step of controlling the air cooling system to monitor the ambient temperature is returned, including:

[0080] During the execution of the first operation, determine whether the ambient temperature t0 is greater than the set temperature t;

[0081] If so, end the execution of the first operation and return to the step of controlling the heat dissipation module to execute the second operation;

[0082] If not, continuously execute the first operation for a duration of T0. After ending the first operation and executing the second operation, control the next heat dissipation module as the current heat dissipation module and return to the step of controlling the heat dissipation module to execute the first operation.

[0083] When the heat dissipation module implements the anti-freezing method, due to the decrease in its heat dissipation efficiency, the current ambient temperature t0 at the corresponding position will rise. When the temperature t0 > t and the execution duration T of the first operation is < T0, at this time, immediately stop executing the first operation and change to execute the second operation, so that the corresponding heat dissipation module restores the normal heat dissipation efficiency. While ensuring that the tube bundle at the corresponding position will not be frozen due to local low temperature, quickly restore the heat dissipation efficiency and reduce the impact on the overall heat dissipation effect of the air-cooled system.

[0084] In some embodiments, if so, end the execution of the first operation and return to the step of controlling the heat dissipation module to execute the second operation, including:

[0085] Determine whether the actual execution duration Tx of the first operation is greater than the set time Ts;

[0086] If so, keep the preset heat dissipation module unchanged;

[0087] If not, use the currently controlled heat dissipation module as the preset heat dissipation module.

[0088] After the anti-freezing method is first implemented and the ambient temperature t0 in the air-cooled system becomes greater than t, the anti-freezing method is stopped. If it is detected again that the ambient temperature t0 in the air-cooled system is less than or equal to t, the anti-freezing method needs to be implemented again and a quick response is required. When implementing the anti-freezing method for the second time, the interval duration Tx between the start time of this implementation and the stop time of the previous implementation is counted, and the duration Tx is compared with the set time Ts. If Tx is less than or equal to Ts, it indicates that the interval time between the two implementations of the anti-freezing method is short. Therefore, it shows that the current ambient temperature t0 in the air-cooled system is still low, and there is a risk of tube bundle cracking due to too low local temperature. Moreover, the temperature at the corresponding position of the heat dissipation module that has just executed the anti-freezing method is bound to be higher than that of the heat dissipation module that has not executed the anti-freezing method. Therefore, choosing to start a new round of anti-freezing method implementation from the heat dissipation module where the last action of the previous anti-freezing method was implemented or the next group of heat dissipation modules of this heat dissipation module helps to increase the ambient temperature of the heat dissipation module that has not implemented the anti-freezing method and its corresponding position, thereby avoiding too low local temperature in the air-cooled system and thus avoiding tube bundle cracking. For example, when the first anti-freezing method is implemented and it stops at the heat dissipation module of the Xth group, then when implementing the second anti-freezing method, it can be selected to start a new round of anti-freezing method implementation from the Xth group or the (X + 1)th group of heat dissipation modules. It should be noted that when rotating the heat dissipation modules, the heat dissipation modules are rotated, that is, when X = N, the (X + 1)th group is the first group.

[0089] If Tx is greater than Ts, it indicates that the interval time between the two implementations of the anti-freezing method is long. For the heat dissipation module that has implemented the anti-freezing method before, the ambient temperature at its corresponding position is similar to the ambient temperature at the corresponding position of the heat dissipation module that has not implemented the anti-freezing method. Therefore, it is okay to choose to start a new round of anti-freezing method implementation from the heat dissipation module where the last action of the previous anti-freezing method was implemented or the next group of heat dissipation modules of this heat dissipation module or the preset heat dissipation module, and the effect is the same. For example, if the initially set is the first group of heat dissipation modules and the anti-freezing method finally stops being implemented at the Xth group of heat dissipation modules for the first time, then the second round of anti-freezing method implementation can be started from the Xth group, the (X + 1)th group or the first group of heat dissipation modules.

[0090] In some embodiments, determining whether the actual execution duration Tx of the first operation is greater than the set duration Ts includes:

[0091] The duration Ts includes Ts1 and Ts2;

[0092] Determining whether the duration Tx is greater than Ts2;

[0093] If so, keep the preset heat dissipation module unchanged;

[0094] If not, determine whether the duration Tx is less than Ts1;

[0095] If so, use the currently controlled heat dissipation module as the preset heat dissipation module;

[0096] If not, keep the preset heat dissipation module unchanged or use the currently controlled heat dissipation module as the preset heat dissipation module.

[0097] The set time Ts is subdivided into Ts1 and Ts2. If the time Tx < Ts1, it indicates that the interval between two implementations of the anti-freezing method is short. Therefore, after the first anti-freezing method is implemented, the influence on the temperatures at different positions of the air-cooling system still exists. Thus, it is preferred to start implementing the second anti-freezing method from the heat dissipation module where the first anti-freezing method stops being implemented, to avoid the problem of reduced lifespan caused by frequent implementation of the anti-freezing method on the preset heat dissipation module.

[0098] If the time Tx > Ts2, it indicates that the interval between two implementations of the anti-freezing method is long, and the residual effect of the first anti-freezing method on the internal environmental temperature of the air-cooling system is small. Thus, it is preferred to start implementing the second anti-freezing method from the preset heat dissipation module.

[0099] It should be noted that when selecting the preset heat dissipation module, it is preferred to select the heat dissipation module at the lowest point of the internal environment temperature of the air-cooling system or at the position corresponding to the past tube bundle freeze crack, so that it preferentially adjusts the heat dissipation power and then regulates the temperature to avoid tube bundle freeze crack. It is also possible to select the heat dissipation module at the outermost edge position as the preset heat dissipation module according to the placement position of the heat dissipation module.

[0100] If the time Ts1 ≤ Tx ≤ Ts2, it indicates that the interval time is in a relatively middle period. Therefore, the implementation of the first anti-freezing method still has an impact on the internal environmental temperature of the air-cooling system, but the impact is small. Thus, it is okay to select the heat dissipation module at any position as the starting heat dissipation module for implementing the second anti-freezing method, and the anti-freezing impact on the overall equipment is small.

[0101] In some embodiments, Ts is a fixed value or a variable value related to the current atmospheric environmental temperature;

[0102] Or Ts1 and Ts2 are fixed values or variable values related to the current atmospheric environmental temperature.

[0103] When setting Ts, Ts1, and Ts2, vertical setting can be performed according to empirical values, and it can also be adjusted according to the current atmospheric environmental temperature. For example, if the current atmospheric environmental temperature is high, after the heat dissipation module adjusts the heat dissipation power, its temperature changes quickly. Therefore, the values of Ts, Ts1, and Ts2 can be increased accordingly. Conversely, the values of Ts, Ts1, and Ts2 can be decreased accordingly.

[0104] In some embodiments, determining whether the environmental temperature t0 is greater than the set temperature t includes:

[0105] The temperature t includes t1 and t2, and t1 < t2;

[0106] Determine whether the ambient temperature t0 is greater than t2;

[0107] If so, control all heat dissipation modules to perform the second operation, and return to the step of controlling the air-cooling system to monitor the ambient temperature;

[0108] If not, determine whether the ambient temperature t0 is less than t1;

[0109] If so, control the preset heat dissipation module to perform the first operation for a duration of T0. After the first operation ends, while performing the second operation, control the next heat dissipation module as the current heat dissipation module for control, and return to the step of controlling the heat dissipation module to perform the first operation; until the temperature t0 > t2, return to the step of controlling the air-cooling system to monitor the ambient temperature;

[0110] If not, control the current heat dissipation module to maintain the operation being performed until the ambient temperature t0 is greater than t2 or the ambient temperature t0 is less than t1.

[0111] Decompose the set temperature t, so that the set temperature has a large range, avoiding the anti-freezing method from repeatedly jumping between stopping and implementing again, and thus avoiding the heat dissipation module from frequently performing the corresponding operations to extend the service life;

[0112] Specifically, when the current temperature t0 is less than t1, it indicates that the current temperature is relatively low, so the first operation is performed to increase the current ambient temperature in the air-cooling system until the temperature t0 > t2, and then the second operation is performed;

[0113] When the current temperature t0 is greater than t2, it indicates that the current temperature is relatively high, so directly control all heat dissipation modules to perform the second operation;

[0114] When the current temperature is between t1 and t2, the current module maintains its current state, that is, if the heat dissipation module is performing the first operation at this time, continue to maintain the first operation, and if the second operation is being performed at this time, continue to maintain the second operation, thus avoiding the heat dissipation module from frequently switching the operation being performed.

[0115] In some embodiments, the first operation includes:

[0116] Control the air-cooling system to monitor the current heat dissipation module and continuously obtain the parameter P0 of the current heat dissipation module;

[0117] Determine whether the control parameter P0 is greater than the set parameter P;

[0118] If so, control P0 to decrease to P;

[0119] If not, control P0 to be adjusted to 0;

[0120] The second operation includes:

[0121] The control parameter P0 is restored to the initial value or remains unchanged at the initial value. Both the first operation and the second operation regulate the heat dissipation efficiency of the heat dissipation module by changing or maintaining one or more parameters in the heat dissipation module. Therefore, it is necessary to monitor the corresponding parameters, compare the monitored values with the set values, and then perform corresponding adjustments to enable the heat dissipation module to obtain the expected heat dissipation effect.

[0122] In some embodiments, determining whether the control parameter P0 is greater than the set parameter P includes:

[0123] The parameter P includes Pt1 and Pt2, where Pt1 < Pt2;

[0124] Determine whether the parameter P0 is greater than Pt2;

[0125] If so, control P0 to be adjusted to P0 - Pt1;

[0126] If not, determine whether the parameter P0 is less than Pt1;

[0127] If so, control P0 to be adjusted to 0;

[0128] If not, control P0 to be adjusted to Pt1.

[0129] By dividing the set value of the parameter P into two values, Pt1 and Pt2, segmented adjustment of the parameter P0 is achieved to improve the smoothness of the change in the heat dissipation effect of the heat dissipation module.

[0130] In some embodiments, P is a fixed value or a variable value related to the current ambient air temperature;

[0131] Or Pt1 and Pt2 are fixed values or variable values related to the current ambient air temperature.

[0132] When setting the parameters P, Pt1, and Pt2, they can be set according to empirical values or according to the current ambient air temperature, so that after the anti-freezing method is implemented, the change curve of the temperature regulation of the heat dissipation module is smoother and temperature breaks are avoided.

[0133] In some embodiments, the parameter P includes at least one of the opening amount of the heat dissipation window in the air-cooling system and the working power of the heat dissipation fan.

[0134] For an indirect air-cooling system, there is a situation where no heat dissipation fan is installed inside it. Therefore, at this time, the opening amount of the heat dissipation window is selected as the adjustment parameter. By adjusting the opening amount of the heat dissipation window, the air flow rate passing through the heat dissipation module per unit time can be regulated, so that the purpose of adjusting the heat dissipation efficiency of the heat dissipation module can be achieved;

[0135] Similarly, for a direct air-cooling system, there is a situation where the opening and closing amount of the heat dissipation window is fixed inside. Therefore, at this time, the operating power of the heat dissipation fan is selected as the adjustment parameter. By changing the power of the heat dissipation fan, the air flow rate passing through the heat dissipation module per unit time can be regulated, so that the purpose of adjusting the heat dissipation efficiency of the heat dissipation module can be achieved.

[0136] In some embodiments, both the power of the heat dissipation fan and the opening and closing amount of the heat dissipation window are adjustable. Therefore, both of them can be used as adjustment parameters simultaneously to further improve the accuracy of adjusting the heat dissipation efficiency of the heat dissipation module.

[0137] In some embodiments, the control temperature t0 is compared with the set temperature t. If the temperature t0 ≤ t, several sets of set heat dissipation modules are controlled to perform the first operation. If the temperature t0 > t, the current several sets of heat dissipation modules are controlled to perform the second operation.

[0138] When implementing the anti-freezing method, it is possible to select to adjust the heat dissipation efficiency of one set of heat dissipation modules each time, or it is also possible to select to adjust the heat dissipation efficiency of multiple sets of heat dissipation modules synchronously to quickly raise the ambient temperature inside the air-cooling system and avoid freezing of the tube bundles.

[0139] It should be noted that the above-mentioned heat dissipation module should be the smallest executable unit, such as the motor that drives the fan blade to rotate, the motor that drives the opening and closing angle of the heat dissipation window, etc.

[0140] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other.

[0141] The above has introduced in detail the anti-freezing method for the air-cooling system provided by the present invention. Specific examples are used herein to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. An anti-freezing method for an air-cooled system, characterized in that, Applied to an air-cooling system, the air-cooling system includes N heat dissipation modules, where N is a positive integer, and the anti-freezing method includes: Controlling the air-cooling system to monitor the ambient temperature, and continuously obtaining the current ambient temperature t0 of the air-cooling system; Judging whether the ambient temperature t0 is greater than the set temperature t; If so, controlling all heat dissipation modules to perform a second operation, and returning to the step of controlling the air-cooling system to monitor the ambient temperature; If not, controlling a preset heat dissipation module to perform a first operation for a duration of T0. After the first operation ends, while performing the second operation, controlling the next heat dissipation module as the current heat dissipation module for control, and returning to the step of controlling the heat dissipation module to perform the first operation; until the temperature t0 > t, returning to the step of controlling the air-cooling system to monitor the ambient temperature.

2. The anti-freezing method for an air-cooling system according to claim 1, wherein If not, controlling a preset heat dissipation module to perform a first operation for a duration of T0. After the first operation ends, while performing the second operation, controlling the next heat dissipation module as the current heat dissipation module for control, and returning to the step of controlling the heat dissipation module to perform the first operation; Until the temperature t0 > t, returning to the step of controlling the air-cooling system to monitor the ambient temperature, includes: During the execution of the first operation, judging whether the ambient temperature t0 is greater than the set temperature t; If so, ending the execution of the first operation, and returning to the step of controlling the heat dissipation module to perform the second operation; If not, continuously performing the first operation for a duration of T0. After the first operation ends, while performing the second operation, controlling the next heat dissipation module as the current heat dissipation module for control, and returning to the step of controlling the heat dissipation module to perform the first operation.

3. The anti-freezing method for an air-cooling system according to claim 1, wherein If so, ending the execution of the first operation, and returning to the step of controlling the heat dissipation module to perform the second operation, includes: Judging whether the actual execution duration Tx of the first operation is greater than the set time Ts; If so, keeping the preset heat dissipation module unchanged; If not, taking the currently controlled heat dissipation module as the preset heat dissipation module.

4. The anti-freezing method for an air-cooling system according to claim 3, wherein Judging whether the actual execution duration Tx of the first operation is greater than the set duration Ts, includes: The duration Ts includes Ts1 and Ts2; Judging whether the duration Tx is greater than Ts2; If so, keeping the preset heat dissipation module unchanged; If not, judging whether the duration Tx is less than Ts1; If so, taking the currently controlled heat dissipation module as the preset heat dissipation module; If not, keeping the preset heat dissipation module unchanged or taking the currently controlled heat dissipation module as the preset heat dissipation module.

5. The anti-freezing method for the air-cooled system according to claim 4, wherein Ts is a fixed value or a variable value related to the current ambient air temperature; Or Ts1 and Ts2 are fixed values or variable values related to the current ambient air temperature.

6. The anti-freezing method for an air-cooling system according to claim 1, wherein Judging whether the ambient temperature t0 is greater than the set temperature t, includes: The temperature t includes t1 and t2, and t1 < t2; Determine whether the ambient temperature t0 is greater than t2; If yes, control all heat dissipation modules to perform the second operation, and return to the step of controlling the air-cooling system to monitor the ambient temperature; If not, determine whether the ambient temperature t0 is less than t1; If yes, control the preset heat dissipation module to perform the first operation for a duration of T0. After the first operation ends, while performing the second operation, control the next heat dissipation module as the current heat dissipation module for control, and return to the step of controlling the heat dissipation module to perform the first operation; until the temperature t0 > t2, return to the step of controlling the air-cooling system to monitor the ambient temperature; If not, control the current heat dissipation module to maintain the ongoing operation until the ambient temperature t0 is greater than t2 or the ambient temperature t0 is less than t1.

7. The anti-freezing method for the air-cooled system according to any one of claims 1-6, characterized in that, The first operation includes: Control the air-cooling system to monitor the current heat dissipation module and continuously obtain the parameter P0 of the current heat dissipation module; Determine whether the control parameter P0 is greater than the set parameter P; If yes, control P0 to decrease to P; If not, control P0 to be adjusted to 0; The second operation includes: Control the parameter P0 to return to the initial value or remain unchanged at the initial value.

8. The anti-freezing method for the air-cooling system according to claim 7, characterized in that, Determining whether the control parameter P0 is greater than the set parameter P includes: The parameter P includes Pt1 and Pt2, where Pt1 < Pt2; Determine whether the parameter P0 is greater than Pt2; If yes, control P0 to be adjusted to P0 - Pt1; If not, determine whether the parameter P0 is less than Pt1; If yes, control P0 to be adjusted to 0; If not, control P0 to be adjusted to Pt1.

9. The anti-freezing method for the air-cooled system according to claim 8, wherein The P is a fixed value or a variable value related to the current ambient atmospheric temperature; Or Pt1 and Pt2 are fixed values or variable values related to the current ambient atmospheric temperature.

10. The anti-freezing method for the air-cooled system according to claim 7, wherein The parameter P includes at least one of the opening amount of the heat dissipation window in the air-cooling system and the working power of the heat dissipation fan.

Images