Dry-wet heat exchanger control method, dry-wet heat exchanger, control module and storage medium

Abstract

The application discloses a dry-wet heat exchanger control method, a dry-wet heat exchanger, a control module and a storage medium, wherein the dry-wet heat exchanger control method comprises the following steps: obtaining a current heat exchanger heat exchange demand; determining whether the current heat exchanger heat exchange demand is less than a first preset value; if yes, controlling a spraying pump of the heat exchanger to be closed, and controlling a fan of the heat exchanger to be operated at a first corresponding relationship between a first rotating speed and a second rotating speed, the heat exchanger heat exchange amount requirement being increased in the first corresponding relationship, the rotating speed of the fan being increased, and the second rotating speed being greater than the first rotating speed; determining whether the current heat exchanger heat exchange demand is a second preset value; if yes, controlling the spraying pump to be opened and operated at a first pump speed, and controlling the fan to be operated at a third rotating speed which is less than the second rotating speed, and the second preset value being not less than the first preset value. The temperature fluctuation problem during dry-wet state switching can be effectively solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat exchange, more particularly, to a dry-wet heat exchanger control method, a dry-wet heat exchanger, a dry-wet heat exchanger control module and a computer readable storage medium. BACKGROUND

[0002] Fluctuations in the temperature within a data center environment can slow down the operation speed and possibly cause loss of computing data and other problems; and the existing cooling tower system usually has only a dry state area or a wet state area, and the two areas do not exist independently, that is, the wet state area is usually the original dry state area that is changed into a wet state area by adding an external water cooling cycle, and the wet state area becomes a dry state area again when the water supply is stopped; the structure is relatively simple, and the control needs to consider fewer factors, and usually does not consider the short-term temperature fluctuations caused by device switching.

[0003] In view of the above, how to effectively solve the problem of temperature fluctuations during dry-wet state switching is a problem that needs to be solved by the technical personnel in the field. SUMMARY

[0004] Therefore, the first object of the present application is to provide a dry-wet heat exchanger control method that can effectively solve the problem of temperature fluctuations during dry-wet state switching, and the second, third and fourth objects of the present application are to provide a dry-wet heat exchanger, a dry-wet heat exchanger control module and a computer readable storage medium that can apply the above dry-wet heat exchanger control method, respectively.

[0005] In order to achieve the first object, the present application provides the following technical solutions:

[0006] A dry-wet heat exchanger control method, comprising the following steps:

[0007] Obtaining a current heat exchanger heat exchange requirement;

[0008] If the current heat exchanger heat exchange requirement is less than a first preset value, controlling a spray pump of the heat exchanger to be closed, and controlling a fan of the heat exchanger to operate at a first speed and a second speed according to a first corresponding relationship, the heat exchanger heat exchange requirement in the first corresponding relationship is increased, the speed of the fan is increased, and the second speed is greater than the first speed;

[0009] If the current heat exchanger heat exchange requirement is a second preset value, controlling the spray pump to be opened and operated at a first pump speed, and controlling the fan to operate at a third speed that is less than the second speed, and the second preset value is not less than the first preset value.

[0010] In the heat exchanger application of the above dry-wet heat exchanger control method, when the heat exchanger heat exchange demand rises to the second preset value, the spray pump is not only opened, but also the speed of the fan is controlled to decrease to the third speed to make up for the heat exchange efficiency surge caused by the opening of the spray pump. Further, the heat exchange efficiency of the heat exchanger is steadily improved during the transition from dry state to wet state, so as to greatly reduce temperature fluctuation and improve heat exchange quality. In summary, the dry-wet heat exchanger control method can effectively solve the problem of temperature fluctuation during dry-wet state switching.

[0011] In some embodiments, the second speed is the highest speed of the fan.

[0012] In some embodiments, the first pump speed is the lowest pump speed of the spray pump.

[0013] In some embodiments, the heat exchange amount of the heat exchanger when the fan operates at the second speed and the spray pump is stopped is equal to the heat exchange amount of the heat exchanger when the fan operates at the third speed and the spray pump operates at the first pump speed.

[0014] In some embodiments, the difference between the heat exchange amount of the heat exchanger when the fan operates at the second speed and the spray pump is stopped and the heat exchange amount of the heat exchanger when the fan operates at the third speed and the spray pump operates at the first pump speed is not greater than 5%.

[0015] In some embodiments, the first preset value is equal to the second preset value.

[0016] In some embodiments, after obtaining the current heat exchanger heat exchange demand, when it is determined that the current heat exchanger heat exchange demand is greater than the second preset value, the spray pump is controlled to operate at a speed between the first pump speed and the second pump speed according to a second corresponding relationship, the heat exchanger heat exchange amount requirement increases in the first corresponding relationship, the pump speed of the spray pump increases, and the second pump speed is greater than the first pump speed; and the fan is controlled to operate at a speed between the third speed and the second speed according to a third corresponding relationship, the heat exchanger heat exchange amount requirement increases in the third corresponding relationship, the speed of the fan increases, and the second speed is greater than the third speed.

[0017] In some embodiments, when it is determined that the current heat exchanger heat exchange demand is the second preset value, the spray pump is controlled to be opened and operate at the first pump speed, and the fan is controlled to operate at the third speed which is less than the second speed, the second preset value is not less than the first preset value, including:

[0018] The current heat exchanger heat exchange demand is increased to a second preset value, the spray pump is controlled to be opened and the rotating speed is increased to a first pump speed at a first heat exchange amount change rate, the fan is controlled to operate at a third rotating speed at a second heat exchange amount change rate, and the first heat exchange amount change rate is equal to the second heat exchange amount change rate or the difference is greater than 0 and not greater than 5%.

[0019] In order to achieve the first purpose, the application further provides a dry-wet heat exchanger control method, characterized in that the method comprises the following steps: when it is monitored that the heat exchange demand is increased and the current low-level heat exchange device operates at the highest heat exchange efficiency, the high-level heat exchange device is controlled to start operating, and the low-level heat exchange device is controlled to operate at a reduced heat exchange efficiency; wherein the heat exchange capacity of the high-level heat exchange device is stronger than that of the low-level heat exchange device. One set of high-level heat exchange device and low-level heat exchange device are the spray pump and the fan respectively. Another set of high-level heat exchange device and low-level heat exchange device are the mechanical refrigeration device and the water cooling device respectively.

[0020] In order to achieve the second purpose, the application further provides a dry-wet heat exchanger, which comprises a fan, a spray pump, a heat exchange module and a control module. The fan is used to accelerate the flow of air at the heat exchange module. The spray pump is used to spray evaporable liquid to the whole or part of the heat exchange module. The control module executes the control steps of any one of the dry-wet heat exchanger control methods described above. Since the dry-wet heat exchanger control method has the technical effects described above, the dry-wet heat exchanger using the dry-wet heat exchanger control method should also have corresponding technical effects.

[0021] In order to achieve the third purpose, the application further provides a dry-wet heat exchanger control module, which comprises a storage medium and a processor. The storage medium is configured to store a computer program. The computer program is executed by the processor to implement the steps of any one of the dry-wet heat exchanger control methods described above. Since the dry-wet heat exchanger control method has the technical effects described above, the dry-wet heat exchanger control module using the dry-wet heat exchanger control method should also have corresponding technical effects.

[0022] In order to achieve the fourth purpose, the application further provides a computer readable storage medium, which stores a computer program. The computer program is executed by a processor to implement any one of the dry-wet heat exchanger control methods described above. Since the dry-wet heat exchanger control method has the technical effects described above, the computer readable storage medium having the computer program of the dry-wet heat exchanger control method should also have corresponding technical effects. BRIEF DESCRIPTION OF DRAWINGS

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the dry and wet heat exchanger control method provided in an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of another dry-wet heat exchanger control method provided in an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the structure of a dry-wet heat exchanger provided in an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the heat exchange system provided in an embodiment of the present invention.

[0028] The following labels are shown in the attached diagram:

[0029] 1. Heat exchanger; 2. Liquid receiver; 3. Drive pump; 4. Check valve; 5. Evaporator; 6. Parallel channel; 7. Compressor;

[0030] 11. Spray pump, 12. Fan, 13. Wet heat exchanger, 14. Dry heat exchanger. Detailed Implementation

[0031] This invention discloses a control method for a dry-wet heat exchanger, which can effectively solve the problem of temperature fluctuations during the switching between dry and wet states.

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Please see Figures 1-4 , Figure 1 This is a schematic diagram of the dry and wet heat exchanger control method provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of another dry-wet heat exchanger control method provided in an embodiment of the present invention;

[0034] Figure 3 This is a schematic diagram of the structure of a dry-wet heat exchanger provided in an embodiment of the present invention; Figure 4A structure schematic diagram of a heat exchange system provided by an embodiment of the present application.

[0035] In an embodiment, the present embodiment provides a dry-wet heat exchanger control method, mainly related to the control when switching between dry state and wet state, wherein the dry-wet heat exchanger has a wet state heat exchanger 13 and a dry state heat exchanger 14 inside, wherein the wet state heat exchanger 13 and the dry state heat exchanger 14 are connected in series on the refrigerant circulation channel, which can be connected in series on the water cooling circulation system or on the mechanical refrigeration circulation channel. The wet state heat exchanger 13 is provided with a spray pump to spray the surface of the wet state heat exchanger 13 through the spray pump, the liquid evaporates, absorbs a large amount of heat and is discharged, thereby achieving the effect of heat dissipation, and the evaporated gas is discharged, which is generally achieved by a wind guiding device such as a fan. The dry state heat exchanger 14 mainly uses air body acceleration flow, the cold air entering the dry state heat exchanger 14 absorbs heat from the dry state heat exchanger 14 and then is discharged, which is generally achieved by accelerating the air flow in the wind tunnel by a fan. The air duct where the wet state heat exchanger 13 is located and the air duct where the dry state heat exchanger 14 is located can be connected in parallel or in series; when connected in series, the influence between the air body of the wet state heat exchanger 13 and the air body of the dry state heat exchanger 14 needs to be considered comprehensively to form different heat exchange efficiencies, but the wet state heat exchanger 13 and the dry state heat exchanger 14 are opened respectively, and the opening power size varies, and the change of the heat exchange efficiency formed is still stable.

[0036] Specifically, the dry-wet heat exchanger control method mainly includes the following steps:

[0037] Step 100: obtaining the current heat exchange requirement of the heat exchanger 1.

[0038] The method for obtaining the heat exchange requirement of the heat exchanger 1 can be determined according to actual needs. One method is to obtain it by comparing the heat of the heat source; another method is to obtain it by comprehensively considering the change of the inlet and outlet fluid temperature of the heat exchanger 1 and the heat exchange capacity of the current heat exchanger 1. Generally, the greater the heat exchange requirement of the heat exchanger 1, the greater the need to improve the current heat exchange capacity of the heat exchanger 1, and the way to improve the heat exchange capacity includes but is not limited to increasing the speed of the fan 12 for cooling, opening the spray pump 11 for spraying, and increasing the speed, etc. The method for obtaining can be real-time acquisition, periodic acquisition, or waiting for external response.

[0039] Step 200: determining whether the current heat exchange requirement of the heat exchanger 1 is less than a first preset value, if yes, controlling the spray pump 11 of the heat exchanger 1 to be closed, and controlling the fan 12 of the heat exchanger 1 to operate at a speed between a first speed and a second speed according to a first corresponding relationship, wherein the heat exchange requirement of the heat exchanger 1 increases, the speed of the fan 12 increases, and the second speed is greater than the first speed.

[0040] That is, when the heat exchange requirement of the heat exchanger 1 is less than the first preset value, dry cooling is performed, and only the spray pump 11 is in a closed state. In the dry cooling mode, cooling is mainly performed through air cooling, and air cooling is achieved by accelerating the air body through the fan 12. The greater the speed of the fan 12, the faster the flow rate of the air body, and the greater the cooling capacity, that is, the higher the heat exchange efficiency of the heat exchanger 1.

[0041] The first preset value is specifically set according to the needs, mainly considering the maximum speed of the fan 12, and then considering the maximum heat exchange efficiency that can be brought by air cooling. That is, when the heat exchange requirement of the heat exchanger 1 is less than the first preset value, air cooling can meet the cooling needs.

[0042] And when the current heat exchange requirement of the heat exchanger 1 is less than the first preset value, the fan 12 of the heat exchanger 1 is controlled to operate at a speed between the first speed and the second speed according to the first corresponding relationship. In the first corresponding relationship, the heat exchange requirement of the heat exchanger 1 increases, and the speed of the fan 12 increases. The above-mentioned second speed is greater than the first speed. It should be noted that in the first corresponding relationship, the heat exchange requirement of the heat exchanger 1 and the speed of the fan 12 can be in a proportional relationship, or in other functional relationships. Mainly, the heat exchange capacity corresponding to the speed of the fan 12 can meet the corresponding heat exchange requirement. Among them, the first speed can be the lowest speed of the fan 12, and the second speed can be the highest speed of the fan 12. The second speed can also be about 95% of the highest speed of the fan 12.

[0043] Step 300: Determine whether the current heat exchange requirement of the heat exchanger 1 is the second preset value. If yes, control the spray pump 11 to open and operate at a first pump speed, and control the fan 12 to operate at a third speed less than the second speed. The second preset value is not less than the first preset value.

[0044] The order of the above-mentioned steps 200 and 300 is not limited, and can be executed in the order of step 200 and then step 300, or in the order of step 300 and then step 200.

[0045] The second preset value is not less than the first preset value, which can be equal to the first preset value, or greater than the first preset value. When the current heat exchange requirement of the heat exchanger 1 is the second preset value, the heat exchanger 1 is just in the wet cooling state. Generally, in the state that the fan 12 cannot meet the heat exchange requirement, at this time the heat exchange requirement of the heat exchanger 1 is at the second preset value, and then the corresponding spray pump 11 needs to be opened to enter the wet cooling state. It should be noted that when the second preset value is greater than the first preset value, when the heat exchange requirement is between the first preset value and the second preset value, the fan 12 can be stably operated at the second speed.

[0046] The second preset value can be a certain value, but considering that there is a small fluctuation allowed in heat exchange demand, the second preset value can also be a range, specifically a small range. When the second preset value is a preset range, comparison with other values should be overall comparison, such as overall less than or overall greater than the compared value.

[0047] The spray pump 11 is controlled to be turned on and run at a first pump speed, so that wet cooling is performed, and the first pump speed is generally the lowest pump speed, and the corresponding fan 12 is controlled to run at a third rotating speed less than the second rotating speed, so that the heat exchange efficiency is compensated by the fan 12 running at a low speed due to the spray pump 11 being turned on, so that the heat exchange efficiency of the heat exchanger 1 is steadily improved.

[0048] In the above embodiment, when the heat exchange demand of the heat exchanger 1 rises to the second preset value, the spray pump 11 is not turned on alone when the heat exchanger 1 applies the above dry-wet heat exchanger control method, and the rotating speed of the fan 12 needs to be controlled to decrease to the third rotating speed to compensate for the increase in heat exchange efficiency due to the spray pump 11 being turned on. Further, the heat exchange efficiency of the heat exchanger 1 is steadily improved when the dry state is switched to the wet state, so as to greatly reduce temperature fluctuation and improve heat exchange quality. In summary, the dry-wet heat exchanger control method can effectively solve the problem of temperature fluctuation when the dry state is switched to the wet state.

[0049] In some embodiments, the heat exchange amount formed when the fan 12 runs at the second rotating speed and the spray pump 11 is turned off can be equal to the heat exchange amount when the fan 12 runs at the third rotating speed and the spray pump 11 runs at the first pump speed.

[0050] So that when the fan 12 runs at the second rotating speed and the heat exchange demand of the heat exchanger 1 increases, so that the wet state needs to be turned on, at this time the heat exchange demand of the heat exchanger 1 is at the second preset value, then the spray pump 11 runs at the first pump speed and the fan 12 runs at the third rotating speed, at this time the heat exchange efficiency of the heat exchanger 1 does not change, so that the switching from the dry state to the wet state is relatively stable.

[0051] In some embodiments, considering that there can be a certain deviation in the calculation and acquisition of the heat exchange amount, the heat exchange amount formed when the fan 12 runs at the second rotating speed and the spray pump 11 is turned off can be not more than 5% different from the heat exchange amount when the fan 12 runs at the third rotating speed and the spray pump 11 runs at the first pump speed.

[0052] In some embodiments, after the step 100 of acquiring the current heat exchange demand of the heat exchanger 1, the above method can further include the step 400 of:

[0053] When it is determined that the heat exchange requirement of the current heat exchanger 1 is greater than the second preset value, the spray pump 11 is controlled to operate at a speed between the first pump speed and the second pump speed according to a second corresponding relationship, the heat exchange requirement of the heat exchanger 1 is increased in the first corresponding relationship, the pump speed of the spray pump 11 is increased, and the second pump speed is greater than the first pump speed; and the fan 12 is controlled to operate at a speed between the third rotating speed and the second rotating speed according to a third corresponding relationship, the heat exchange requirement of the heat exchanger 1 is increased in the third corresponding relationship, the rotating speed of the fan 12 is increased, and the second rotating speed is greater than the third rotating speed.

[0054] It should be noted that when the heat exchange requirement of the heat exchanger 1 is higher than the second preset value, the heat exchange requirement of the heat exchanger 1 needs to be further increased at this time. In the above-mentioned second corresponding relationship and third corresponding relationship, the fan 12 and the spray pump 11 can simultaneously increase the speed, the spray pump 11 can increase the speed first and the fan 12 can increase the speed later, or the fan 12 can increase the speed first and the spray pump 11 can increase the speed later. Generally, the fan 12 increases the speed first when the environmental temperature is relatively low, and the spray pump 11 increases the speed first when the environmental temperature is relatively high. The specific control relationship can also be set according to the actual situation.

[0055] In some embodiments, in the step 300, when it is determined that the heat exchange requirement of the current heat exchanger 1 is the second preset value, the spray pump 11 is controlled to be turned on and operate at the first pump speed, and the fan 12 is controlled to operate at the third rotating speed which is less than the second rotating speed, and the second preset value is not less than the first preset value, which can specifically include:

[0056] When it is determined that the heat exchange requirement of the current heat exchanger 1 is increased to the second preset value, the spray pump 11 is controlled to be turned on and increase the rotating speed to the first pump speed at a first heat exchange amount change rate, and the fan 12 is controlled to operate at the third rotating speed at a second heat exchange amount change rate, and the first heat exchange amount change rate is equal to the second heat exchange amount change rate or the difference is greater than 0 and not greater than 5%.

[0057] The increase is the second preset value, that is, it is not only necessary to judge whether the heat exchange demand of the heat exchanger 1 is the second preset value, but also necessary to judge whether the heat exchange demand is increased from a value lower than the second preset value to the second preset value. Before the increase is the second preset value, the rotating speed of the fan 12 is the second rotating speed. At this time, the spray pump 11 needs to be adjusted from zero to the first pump speed, and the fan 12 needs to be adjusted from the second rotating speed to the third rotating speed. The adjustment process generally needs a certain time. In order to avoid a large fluctuation of the heat exchange efficiency of the heat exchanger 1 in the time period of adjustment, the fan 12 needs to be gradually reduced in rotating speed in the stable speed-up process of the spray pump 11, so that the overall heat exchange efficiency of the heat exchanger 1 presents a relatively stable state. In the above, the first heat exchange amount change rate is equal to the second heat exchange amount change rate or the difference is greater than 0 and not greater than 5%. This is to make the heat exchanger 1 not have a large change in heat exchange efficiency in the speed adjustment process of the fan 12 and the spray pump 11, so as to present a more stable transition effect.

[0058] It should be noted that when the heat exchange demand of the heat exchanger 1 decreases from the second preset value to the first preset value or a value lower than the first preset value, the spray pump 11 needs to be shut down, and the fan 12 needs to be speeded up. Then, the change in heat exchange efficiency caused by the speed-up process of the fan 12 needs to be correspondingly set with the change in heat exchange efficiency caused by the decrease of the spray pump 11 from the first pump speed to zero. In the switching process from the wet state to the dry state, the heat exchange efficiency of the heat exchanger 1 is stable, and a large fluctuation can be avoided.

[0059] In some embodiments, when the first preset value is equal to the second preset value, the heat exchange demand of the heat exchanger 1 is close to the second preset value, and the rotating speed of the fan 12 is close to the second rotating speed.

[0060] In some embodiments, a dry-wet heat exchanger control method is provided, which comprises: when it is monitored that the heat exchange demand is increased and the fan 12 of the heat exchanger 1 is running at the highest rotating speed, the spray pump 11 of the heat exchanger 1 is started to run at the first pump speed, and the current rotating speed of the fan 12 is adjusted, such as to the third rotating speed.

[0061] In some embodiments, for some dry-wet heat exchangers, in dry state, assuming that the rated speed of the fan 12 is 3000 rpm (revolutions per minute), the heat exchange capacity is 6000 J / kg℃ (joules per kilogram degree Celsius); when the fan 12 rotates at 1000 rpm, the heat exchange capacity is 2000 J / kg℃; when the heat exchange capacity is found to be insufficient, the wet state is started, i.e. the spray pump 11 is opened to realize spraying; assuming that the minimum operating speed of the spray pump 11 is 1000 rpm, when it is started to 1000 rpm, the corresponding heat exchange capacity is 4000 J / kg℃, then, adding the heat exchange capacity of 2000 J / kg℃ formed by the fan 12 rotating at 1000 rpm, the total heat exchange capacity of 6000 J / kg℃ can be met, that is, the fan 12 needs to be reduced to 1000 rpm. At this time, assuming that the spray pump 11 needs 5 seconds (seconds) from starting to the minimum operating speed of 1000 rpm, then the fan 12 needs 5 seconds from the rated speed of 3000 rpm to 1000 rpm, that is, the change rate needs to be consistent. It should be noted that the positive proportional coefficient of air volume Q and speed n is k1; then the air volume Q=k1*n; the positive proportional coefficient of heat exchange capacity H and air volume Q is k2; H=k2*Q; therefore, the relationship between heat exchange capacity H and speed n is H=k1*k2*n.

[0062] In some embodiments, the dry-wet heat exchanger can be a single cold quantity driving module or a multi-cold quantity driving module system, which can include a system with only a compressor, a system with a compressor and a fluorine pump, or a system with a compressor, a fluorine pump and an air pump.

[0063] Similarly, when the system loop has both a water circulation loop and a refrigerant circulation loop, when the heat exchange capacity of the water circulation loop cannot meet the condition, the refrigerant loop needs to be started to supplement the heat exchange capacity; when the refrigerant loop system has only a compressor, in order to maintain the total heat exchange capacity unchanged during switching, the sum of the heat exchange capacity of the compressor started to the minimum speed and the heat exchange capacity of the water pump speed reduced is kept unchanged before and after switching; at the same time, the rate of the switching process is kept unchanged.

[0064] When the refrigerant system loop also has a fluorine pump or an air pump, the switching rule is the same; generally, with the increase of the environment temperature, the fluorine pump is switched to the air pump and then to the compressor mode.

[0065] In some embodiments, a dry-wet heat exchanger control method includes the following steps: when the heat exchange demand is monitored to increase and the current low-level heat exchange device is operated at the highest heat exchange efficiency, the high-level heat exchange device is controlled to start operation, and the low-level heat exchange device is controlled to operate at a reduced heat exchange efficiency. The highest heat exchange capacity of the low-level heat exchange device is lower than the heat exchange capacity of the high-level heat exchange device. For example, in the fan 12 and the spray pump 11, the heat exchange capacity of the former is lower than that of the latter, the fan 12 is the low-level heat exchange device, and the spray pump 11 is the high-level heat exchange device. For example, the heat exchanger 1 has a water circulation loop and a refrigerant circulation loop, wherein the refrigerant circulation loop is the high-level heat exchange device, and the water circulation loop is the low-level heat exchange device.

[0066] In some embodiments, a heat exchange system is provided, which includes the above-mentioned heat exchanger 1, a liquid reservoir 2, a drive pump 3, a check valve 4, an evaporator 5, a parallel channel 6, and a compressor 7. The heat exchanger 1, the liquid reservoir 2, the drive pump 3, the evaporator 5, and the compressor 7 are connected in parallel. The check valve is connected in parallel with the drive pump 3 between the evaporator 5 and the liquid reservoir 2. The parallel channel 6 and the compressor 7 are connected in parallel between the evaporator 5 and the heat exchanger 1. The above-mentioned system can realize liquid cooling by starting the drive pump 3 and stopping the compressor 7, or can realize mechanical refrigeration by stopping the drive pump 3 and starting the compressor 7.

[0067] In some embodiments, a heat exchange system is provided, which can only include a heat exchanger 1, a throttling element, an evaporator 5, and a compressor 7 connected in sequence to form a single air conditioning refrigeration system.

[0068] Based on the dry-wet heat exchanger control method provided in the above-mentioned embodiments, the present application further provides a dry-wet heat exchanger, which includes a fan, a spray pump, a heat exchange module, and a control module. The fan is used to accelerate the flow of air at the heat exchange module. The spray pump is used to spray evaporable liquid to the whole or part of the heat exchange module. The control module performs the control steps according to the dry-wet heat exchanger control method of any one of the above-mentioned embodiments. Since the dry-wet heat exchanger adopts the dry-wet heat exchanger control method, the beneficial effects of the dry-wet heat exchanger are described in the above-mentioned embodiments.

[0069] Based on the dry-wet heat exchanger control method provided in the above-mentioned embodiments, the present application further provides a dry-wet heat exchanger control module, which includes a storage medium and a processor. The storage medium is configured to store a computer program. The computer program can implement the steps of the dry-wet heat exchanger control method of any one of the above-mentioned embodiments when executed by the processor. Since the dry-wet heat exchanger control module adopts the dry-wet heat exchanger control method, the beneficial effects of the dry-wet heat exchanger control method are described in the above-mentioned embodiments.

[0070] Based on the dry-wet heat exchanger control method provided in the above embodiments, the embodiment of the present application further provides a computer readable storage medium, wherein the computer readable storage medium stores a computer program, and the computer program is executed by a processor to implement the dry-wet heat exchanger control method of any of the above embodiments. Since the computer readable storage medium adopts the dry-wet heat exchanger control method, the beneficial effects of the computer readable storage medium refer to the above embodiments.

[0071] The processor (or CPU (Central Processing Unit, Central Processing Unit)) is the computing core and control core of the electronic device, which is suitable for implementing one or more instructions, and is particularly suitable for loading and executing one or more instructions to implement a corresponding method flow or a corresponding function; in one embodiment, the processor of the above embodiment of the present application can be used to perform a series of processing, including each step involved in the method shown in Figure 1 , 2 .

[0072] The present application also provides a computer storage medium (Memory), the above computer storage medium is a memory device in the electronic device, used for storing programs and data. It can be understood that the computer storage medium here can include the built-in storage medium in the electronic device, of course, it can also include the expansion storage medium supported by the electronic device. The computer storage medium provides a storage space, which stores the operating system of the electronic device. And in the storage space, there is also one or more instructions suitable for being loaded and executed by the processor, which can be one or more computer programs (including program codes). It should be noted that the computer storage medium here can be a high-speed RAM memory, or a non-volatile memory, such as at least one disk memory; optionally, it can also be at least one computer storage medium located away from the above processor.

[0073] In one embodiment, one or more instructions stored in the computer storage medium can be loaded and executed by the processor to implement the corresponding steps in the above embodiments; in a specific implementation, one or more instructions in the computer storage medium can be loaded and executed by the processor to implement each step involved in the method shown in Figure 1 , which will not be repeated here.

[0074] Each embodiment in the specification is described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts of each embodiment can be referred to each other.

[0075] The foregoing description of the disclosed embodiments enables a person skilled in the art to make or use the application. Modifications of these embodiments will occur to persons of skill in the art, and that the appended claims are intended to cover all such modifications that do not depart from the true spirit and scope of the application. Therefore, the application is not limited to the embodiments shown but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for controlling a dry-wet heat exchanger, characterized in that, Includes the following steps: Obtain the current heat exchanger heat exchange requirements; When it is determined whether the current heat exchanger heat exchange demand is less than the first preset value, if so, the spray pump of the heat exchanger is controlled to be turned off, and the heat exchanger fan is controlled to operate at a speed between the first speed and the second speed according to the first correspondence. In the first correspondence, the heat exchanger heat exchange demand increases, the fan speed increases, and the second speed is greater than the first speed. When determining whether the current heat exchanger heat exchange demand is the second preset value, if so, control the spray pump to start and run at the first pump speed, control the fan to run at a third speed less than the second speed, and the second preset value is not less than the first preset value; When the heat exchanger's heat exchange demand rises to the second preset value, requiring the heat exchanger to switch from a dry state to a wet state, the fan speed is controlled to decrease while the spray pump is turned on.

2. The dry / wet heat exchanger control method according to claim 1, characterized in that, The second speed is the maximum speed of the fan.

3. The dry / wet heat exchanger control method according to claim 2, characterized in that, The first pump speed is the minimum pumping speed of the spray pump.

4. The dry / wet heat exchanger control method according to claim 3, characterized in that, The amount of heat exchanged by the heat exchanger when the fan is running at the second speed and the spray pump is stopped is equal to the amount of heat exchanged by the heat exchanger when the fan is running at the third speed and the spray pump is running at the first pump speed.

5. The dry / wet heat exchanger control method according to claim 3, characterized in that, The difference between the heat exchanger's heat exchange capacity when the fan is running at the second speed and the spray pump is stopped and the heat exchanger's heat exchange capacity when the fan is running at the third speed and the spray pump is running at the first pump speed is no greater than 5%.

6. The dry / wet heat exchanger control method according to claim 5, characterized in that, The first preset value is equal to the second preset value.

7. The dry / wet heat exchanger control method according to any one of claims 1-6, characterized in that, After obtaining the current heat exchanger heat exchange requirement, when it is determined that the current heat exchanger heat exchange requirement is greater than a second preset value: the spray pump is controlled to operate at a speed between the first pump speed and the second pump speed according to a second correspondence. In the first correspondence, as the heat exchanger heat exchange requirement increases, the pump speed of the spray pump increases, and the second pump speed is greater than the first pump speed; and the fan is controlled to operate at a speed between the third speed and the second speed according to a third correspondence. In the third correspondence, as the heat exchanger heat exchange requirement increases, the fan speed increases, and the second speed is greater than the third speed.

8. The dry / wet heat exchanger control method according to any one of claims 1-6, characterized in that, When the current heat exchanger heat exchange demand is determined to be a second preset value, the spray pump is controlled to start and operate at a first pump speed, and the fan is controlled to operate at a third speed less than the second speed. The second preset value is not less than the first preset value, including: When it is determined that the current heat exchanger heat exchange demand has increased to the second preset value, the spray pump is controlled to start and the speed is increased to the first pump speed according to the first heat exchange change rate. At the same time, the fan is controlled to decrease the speed to the third speed according to the second heat exchange change rate. The first heat exchange change rate and the second heat exchange change rate are equal or the difference is greater than 0 and not greater than 5%.

9. A method for controlling a dry-wet heat exchanger, characterized in that, Includes the following steps: When an increase in heat exchange demand is detected and the current low-level heat exchange device is operating at its highest heat exchange efficiency, and it is necessary to switch the heat exchanger from a dry state to a wet state, the high-level heat exchange device is controlled to start operation, and the low-level heat exchange device is controlled to reduce its heat exchange efficiency; wherein the heat exchange capacity of the high-level heat exchange device is stronger than that of the low-level heat exchange device, the high-level heat exchange device is a spray pump, and the low-level heat exchange device is a fan.

10. A dry-wet heat exchanger, characterized in that, The device includes a fan, a spray pump, a heat exchange module, and a control module. The fan is used to accelerate the airflow at the heat exchange module, and the spray pump is used to spray evaporable liquid onto all or part of the heat exchange module. The control module executes control steps according to the dry-wet heat exchanger control method according to any one of claims 1-8.

11. A control module for a dry-wet heat exchanger, characterized in that, It includes a storage medium and a processor, the storage medium being configured to store a computer program that, when executed by the processor, enables the implementation of the steps of the dry-wet heat exchanger control method as described in any one of claims 1-8.

12. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, enables the implementation of the dry / wet heat exchanger control method as described in any one of claims 1-8.

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