Rotary dehumidification system, control method, terminal, medium and program product

Abstract

The invention provides a rotary dehumidification system, a control method, a terminal, a medium and a program product. The system comprises a processing air path and a control module. A primary filter, a front surface air cooler, a direct expansion cryogenic module, a dehumidification rotating wheel, a rear surface air cooler and a filter are sequentially arranged on the treatment air path in the air direction; the control module is used for controlling the on-off state of the front surface air cooler according to the temperature, obtained in real time, of the outdoor fresh air and a set temperature threshold value. The control module is further used for controlling the on-off state of the direct expansion cryogenic module according to the humidity, obtained in real time, of the outdoor fresh air and a set absolute moisture content threshold value; and in the running process of the direct expansion copious cooling module, the degree of the direct expansion copious cooling module is controlled based on the direct expansion copious cooling data collected in real time. According to the system, the humidity of air entering the dehumidification rotating wheel is reduced through the direct expansion copious cooling module, then the regeneration load of the rotating wheel is reduced, and therefore the energy consumption of the system is reduced. The energy consumption of the system is further reduced through degree control.

Description

Technical Field

[0001] The present application relates to the field of industrial dehumidification technology, and in particular to a rotary dehumidification system, a control method, a terminal, a medium and a program product. Background Art

[0002] With the surge in demand for lithium batteries and the rapid development of technology, the requirements for temperature and humidity stability in the production environment are also increasing. Rotary dehumidifiers are essential industrial equipment for controlling a constant temperature and humidity environment. In the existing rotary dehumidification system, outdoor fresh air is introduced into the air duct through a treatment fan, initially cooled by the front surface cooler, then sent to the rotary wheel for dehumidification, and finally sent to the production environment through the rear surface cooler. However, this treatment method consumes a large proportion of rotary regeneration energy and consumes a lot of energy. Summary of the invention

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the present application is to provide a rotary dehumidification system, a control method, a terminal, a medium and a program product, which are used to solve the problem of high energy consumption of the existing rotary dehumidification system.

[0004] To achieve the above-mentioned purpose and other related purposes, the first aspect of the present application provides a rotary dehumidification system for dehumidifying outdoor fresh air, comprising: a processing air path, wherein the processing air path is provided with a primary filter, a front surface cooler, a direct expansion cryogenic module, a dehumidification rotary wheel, a rear surface cooler and a filter in sequence along the wind direction; the front surface cooler and the direct expansion cryogenic module are respectively connected to a control module; wherein the control module is used to control the switching state of the front surface cooler according to the temperature of the outdoor fresh air obtained in real time and a set temperature threshold; and is also used to control the switching state of the direct expansion cryogenic module according to the humidity of the outdoor fresh air obtained in real time and a set absolute moisture content threshold; during the operation of the direct expansion cryogenic module, the degree of the direct expansion cryogenic module is controlled based on the direct expansion cryogenic data collected in real time.

[0005] In some embodiments of the first aspect of the present application, the direct expansion cryogenic module is composed of a direct expansion cryogenic main circuit and a bypass circuit; wherein the direct expansion cryogenic main circuit is composed of an evaporator, a compressor, a condenser and an expansion valve connected in sequence; the evaporator is arranged between the front surface cooler and the dehumidification wheel; one end of the bypass circuit is connected between the compressor and the condenser, and the other end is connected between the expansion valve and the evaporator; a bypass valve is arranged on the bypass circuit; and a chilled water valve is also arranged on the condenser.

[0006] In some embodiments of the first aspect of the present application, the direct expansion cryogenic data includes: intake temperature, intake pressure, exhaust temperature, exhaust pressure and current data of the compressor; wherein, the intake temperature is collected by a first temperature acquisition module; the intake pressure is collected by a first pressure acquisition module; the exhaust temperature is collected by a second temperature acquisition module; the exhaust pressure is collected by a second pressure acquisition module; the first temperature acquisition module and the first pressure acquisition module are arranged on the air inlet path of the compressor; the second temperature acquisition module and the second pressure acquisition module are arranged on the air outlet path of the compressor.

[0007] In some embodiments of the first aspect of the present application, the switching state of the front surface cooler is controlled according to the real-time temperature of the outdoor fresh air and the set temperature threshold, including: when the real-time temperature of the outdoor fresh air is greater than the set temperature threshold, turning on the front surface cooler; when the real-time temperature of the outdoor fresh air is less than the set temperature threshold, turning off the front surface cooler.

[0008] In some embodiments of the first aspect of the present application, the switching state of the direct expansion cryogenic module is controlled according to the humidity of the outdoor fresh air obtained in real time and the set absolute moisture content threshold, including: when the humidity of the outdoor fresh air obtained in real time is less than the set absolute moisture content threshold, turning off the direct expansion cryogenic module; when the humidity of the outdoor fresh air obtained in real time is greater than the set absolute moisture content threshold, turning on the direct expansion cryogenic module.

[0009] In some embodiments of the first aspect of the present application, the direct expansion cryogenic module is controlled based on the direct expansion cryogenic data collected in real time, including: obtaining a first saturation temperature corresponding to the suction pressure and a second saturation temperature corresponding to the exhaust pressure; calculating the superheat based on the first saturation temperature and the suction temperature; controlling the opening of the bypass valve according to the suction pressure and the compressor inlet pressure parameters; controlling the opening of the expansion valve according to the superheat and a set superheat threshold; shutting down the compressor according to any one of the exhaust pressure, exhaust temperature and compressor current; and controlling the opening of the chilled water valve based on the second saturation temperature and the acquired target saturation temperature.

[0010] To achieve the above-mentioned purpose and other related purposes, the second aspect of the present application provides a control method for a rotary dehumidification system, which is applied to a rotary dehumidification system, wherein the rotary dehumidification system is used to dehumidify outdoor fresh air, comprising: a processing air path, wherein the processing air path is provided with a primary filter, a front surface cooler, a direct expansion cryogenic module, a dehumidification wheel, a rear surface cooler and a filter in sequence along the wind direction; the control method comprises: real-time acquisition of the temperature and humidity of the outdoor fresh air; controlling the switching state of the front surface cooler according to the real-time acquired temperature of the outdoor fresh air and a set temperature threshold; controlling the switching state of the direct expansion cryogenic module according to the real-time acquired humidity of the outdoor fresh air and a set absolute moisture content threshold; during the operation of the direct expansion cryogenic module, performing degree control on the direct expansion cryogenic module based on the real-time collected direct expansion cryogenic data.

[0011] To achieve the above-mentioned purpose and other related purposes, the third aspect of the present application provides a computer-readable storage medium having a computer program stored thereon, and the computer program implements the control method of the rotary dehumidification system when executed by a processor.

[0012] To achieve the above-mentioned purpose and other related purposes, the fourth aspect of the present application provides a computer program product, which includes a computer program code. When the computer program code runs on a computer, the computer implements the control method of the rotary dehumidification system.

[0013] To achieve the above-mentioned purpose and other related purposes, the fifth aspect of the present application provides an electronic terminal, including a memory, a processor and a computer program stored in the memory; the processor executes the computer program to implement the control method of the rotary dehumidification system.

[0014] As described above, the rotary dehumidification system, control method, terminal, medium and program product of the present application have the following beneficial effects:

[0015] The present application reduces the humidity of the air entering the dehumidification wheel through the direct expansion cryogenic module, thereby reducing the regeneration load of the wheel, thereby reducing the energy consumption of the wheel dehumidification system. The present application also further reduces the energy consumption of the wheel dehumidification system through degree control. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Shown is a schematic diagram of the structure of a rotary dehumidification system in one embodiment of the present application.

[0017] Figure 2 Shown is a schematic structural diagram of a direct expansion cryogenic module in one embodiment of the present application.

[0018] Figure 3Shown is a flow chart of a control method for a rotary dehumidification system in one embodiment of the present application.

[0019] Figure 4 Shown is a schematic diagram of the structure of an electronic terminal in one embodiment of the present application. DETAILED DESCRIPTION

[0020] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0021] In the embodiments of the present application, words such as "first" and "second" are used to distinguish the same or similar items with basically the same functions and effects. For example, the first temperature acquisition module and the second temperature acquisition module are only used to distinguish different temperature acquisition modules, and their order is not limited. Those skilled in the art can understand that words such as "first" and "second" do not limit the quantity and execution order, and words such as "first" and "second" do not necessarily limit them to be different.

[0022] It should be noted that in the embodiments of the present application, words such as "exemplary" or "for example" represent examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0023] In the embodiments of the present application, "at least one" refers to one or more, and "plurality" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can represent: a, b, c, ab, ac, bc or abc, where a, b, c can be single or multiple.

[0024] To facilitate understanding of the embodiments of the present application, first Figure 1 Detailed description. Figure 1 The structure diagram of a rotary dehumidification system in an embodiment of the present invention is shown. The rotary dehumidification system in this embodiment is used to dehumidify outdoor fresh air, and includes:

[0025] A processing air path, wherein the processing air path is provided with a primary filter 1, a front surface cooler 2, a direct expansion cryogenic module 3, a dehumidification wheel 4, a rear surface cooler 5 and a filter 6 in sequence along the wind direction; the front surface cooler 2 and the direct expansion cryogenic module 3 are respectively connected to a control module;

[0026] Among them, the control module is used to control the switching state of the front surface cooler 2 according to the real-time temperature of the outdoor fresh air and the set temperature threshold; it is also used to control the switching state of the direct expansion cryogenic module 3 according to the real-time humidity of the outdoor fresh air and the set absolute moisture content threshold; during the operation of the direct expansion cryogenic module 3, the degree of the direct expansion cryogenic module is controlled based on the real-time collected direct expansion cryogenic data.

[0027] It should be noted that Figure 1 The arrows in the diagram indicate the direction of air flow.

[0028] In a specific embodiment, if Figure 1 As shown, the primary filter 1 is used to filter the outdoor fresh air through the porous filter material to ensure the air cleanliness of the process workshop or other application places. The primary filter is a simple and basic filter with a filtration efficiency of less than 90%, mainly including primary plate filters, primary folding filters, primary bag filters, metal mesh regeneration filters, etc.

[0029] The main function of the front surface cooler 2 is to cool and dehumidify. The front surface cooler is used to cool and dehumidify the air to be treated, control the temperature and humidity of the supply air, and make the air to be treated reach a relatively low temperature and low humidity state before entering the next step.

[0030] The surface of the dehumidification wheel 4 is coated with a moisture absorbent and is provided with a honeycomb-shaped multi-porous channel. By slowly rotating the dehumidification wheel, the moisture in the humid air flowing through the dehumidification wheel can be absorbed to achieve the purpose of dehumidification. The rear surface cooler 5 has a similar function to the front surface cooler 2 and is used for cooling and dehumidification. The filter 6 is used to filter the air.

[0031] In one embodiment, the control module is a PLC (Programmable Logic Controller).

[0032] In one embodiment, the switch state of the front surface cooler is controlled according to the temperature of the outdoor fresh air obtained in real time and the set temperature threshold, including:

[0033] When the temperature of the outdoor fresh air obtained in real time is greater than the set temperature threshold, the front surface cooler is turned on;

[0034] When the temperature of the outdoor fresh air obtained in real time is lower than the set temperature threshold, the front surface cooler is turned off.

[0035] It should be noted that the set temperature threshold is generally 12°C. When the temperature of the outdoor fresh air is less than 12°C, the front surface cooler has no processing capacity for the air sent into it, so the front surface cooler is turned off to reduce energy consumption.

[0036] In one embodiment, the switching state of the direct expansion cryogenic module is controlled according to the humidity of the outdoor fresh air obtained in real time and the set absolute humidity content threshold, including: when the humidity of the outdoor fresh air obtained in real time is less than the set absolute humidity content threshold, the direct expansion cryogenic module is turned off; when the humidity of the outdoor fresh air obtained in real time is greater than the set absolute humidity content threshold, the direct expansion cryogenic module is turned on.

[0037] It should be noted that absolute humidity refers to the mass of water vapor contained in every kilogram of dry air. It is an important parameter for measuring the water vapor content in the air. The absolute humidity threshold is generally set at 6.8g / kg.

[0038] In one embodiment, if Figure 1 as well as Figure 2 As shown, the direct expansion cryogenic module is composed of a direct expansion cryogenic main circuit and a bypass circuit;

[0039] Among them, the direct expansion cryogenic main circuit is composed of an evaporator 31, a compressor 32, a condenser 33 and an expansion valve 34 connected in sequence; the evaporator 31 is arranged between the front surface cooler 2 and the dehumidification wheel 4; one end of the bypass circuit is connected between the compressor 32 and the condenser 33, and the other end is connected between the expansion valve 34 and the evaporator 31; a bypass valve 35 is arranged on the bypass circuit; and a chilled water valve 331 is also arranged on the condenser 33.

[0040] Specifically, the evaporator 31 is connected to the compressor 32 through a pipeline, the compressor 32 is connected to the condenser 33 through a pipeline, the condenser 33 is connected to the expansion valve 34 through a pipeline, and the expansion valve 34 is connected to the evaporator 31 through a pipeline. The bypass loop is a bypass pipeline, one end of which is connected to the pipeline between the compressor 32 and the condenser 33 (hereinafter, the place where the one end of the bypass pipeline is connected to the pipeline between the compressor 32 and the condenser 33 is referred to as the pipeline connection point A), and the other end of the bypass pipeline is connected to the pipeline between the expansion valve 34 and the evaporator 31.

[0041] The following will be combined with the attached Figure 1 The dehumidification process of the rotary dehumidification system is described as follows:

[0042] When the temperature of the outdoor fresh air is greater than 12°C and the humidity of the outdoor fresh air is greater than 6.8g / kg, the primary filter 1, the front surface cooler 2, the direct expansion deep cooling module 3, the dehumidification wheel 4, the rear surface cooler 5 and the filter 6 are all in operation. The outdoor fresh air is first filtered by the primary filter 1 to remove dust and impurities. Then the filtered air is cooled and dehumidified by the front surface cooler 2 to obtain air with a dry bulb temperature of 12°C and an absolute moisture content of 8.3g / kg. The evaporator 31 in the direct expansion deep cooling module 3 cools and dehumidifies the air with a dry bulb temperature of 12°C and an absolute moisture content of 8.3g / kg to obtain air with a dry bulb temperature of 5°C and an absolute moisture content of 5.15g / kg. The air with a dry bulb temperature of 5°C and an absolute moisture content of 5.15g / kg enters the dehumidification wheel 4 and the rear surface cooler 5 in turn to obtain constant temperature and humidity air. Finally, the constant temperature and humidity air is filtered by the filter 6, and the filtered air is sent out from the air supply port. The filter 6 is used to improve the air supply quality.

[0043] When the temperature of the outdoor fresh air is less than 12°C and the humidity of the outdoor fresh air is greater than 6.8g / kg, the front surface cooler 2 is closed under the control of the control module, and the primary filter 1, the direct expansion cryogenic module 3, the dehumidification wheel 4, the rear surface cooler 5 and the filter 6 are all in operation. The outdoor fresh air is first filtered by the primary filter 1 to remove dust and impurities. Then the filtered air is cooled and dehumidified by the direct expansion cryogenic module 3 to obtain the first air. The first air enters the dehumidification wheel 4 and the rear surface cooler 5 in turn to obtain constant temperature and humidity air. Finally, the constant temperature and humidity air is filtered by the filter 6, and the filtered air is sent out from the air supply port. The filter 6 is used to improve the air supply quality.

[0044] When the temperature of the outdoor fresh air is greater than 12°C and the humidity of the outdoor fresh air is less than 6.8g / kg, the direct expansion deep cooling module 3 is closed under the control of the control module, and the primary filter 1, the front surface cooler 2, the dehumidification wheel 4, the rear surface cooler 5 and the filter 6 are all in operation. The outdoor fresh air is first filtered by the primary filter 1 to remove dust and impurities. The filtered air is then cooled and dehumidified by the front surface cooler 2 to obtain the second air. The second air enters the dehumidification wheel 4 and the rear surface cooler 5 in turn to obtain constant temperature and humidity air. Finally, the constant temperature and humidity air is filtered by the filter 6, and the filtered air is sent out from the air outlet. The filter 6 is used to improve the air supply quality.

[0045] When the temperature of the outdoor fresh air is less than 12°C and the humidity of the outdoor fresh air is less than 6.8g / kg, the front surface cooler 2 and the direct expansion deep cooling module 3 are closed under the control of the control module, and the primary filter 1, the dehumidification wheel 4, the rear surface cooler 5 and the filter 6 are all in operation. The outdoor fresh air is first filtered by the primary filter 1 to remove dust and impurities. Then the filtered air enters the dehumidification wheel 4 and the rear surface cooler 5 in turn to obtain constant temperature and humidity air. Finally, the constant temperature and humidity air is filtered by the filter 6 and the filtered air is sent out from the air outlet. The filter 6 is used to improve the air supply quality.

[0046] It should be noted that constant temperature and humidity air refers to air whose temperature and humidity are both kept at specific constant values. The temperature and humidity maintained by the constant temperature and humidity air can be set according to demand, and the present invention does not limit this.

[0047] It should also be noted that by setting a direct expansion cryogenic module between the front surface cooler and the dehumidification wheel, the humidity of the air entering the dehumidification wheel is reduced, the dehumidification load of the dehumidification wheel is reduced, and the regeneration power of the dehumidification wheel is reduced, thereby improving the energy utilization efficiency and reducing the energy consumption of the wheel dehumidification system.

[0048] In one embodiment, if Figure 2 As shown, the direct expansion cryogenic data include: suction temperature, suction pressure, exhaust temperature, exhaust pressure and compressor current data;

[0049] Among them, the suction temperature is collected by the first temperature collection module 36; the suction pressure is collected by the first pressure collection module 37; the exhaust temperature is collected by the second temperature collection module 38; the exhaust pressure is collected by the second pressure collection module 39; the current data of the compressor is obtained by the PLC;

[0050] The first temperature acquisition module 36 and the first pressure acquisition module 37 are arranged on the air inlet path of the compressor 32 ; the second temperature acquisition module 38 and the second pressure acquisition module 39 are arranged on the air outlet path of the compressor 32 .

[0051] Specifically, the first temperature acquisition module 36 and the first pressure acquisition module 37 are arranged on the pipeline between the evaporator 31 and the compressor 32, and the second temperature acquisition module 38 and the second pressure acquisition module 39 are arranged between the compressor 32 and the pipeline connecting point A.

[0052] In one embodiment, the first temperature acquisition module and the second temperature acquisition module can both use temperature sensors, and the first pressure acquisition module and the second pressure acquisition module can both use pressure sensors. It should be noted that those skilled in the art can select appropriate types of temperature sensors and pressure sensors according to requirements, and the present invention does not limit this.

[0053] In one embodiment, if Figure 2 As shown, the refrigerant inside the compressor 32 absorbs heat from the air sent therein, and changes from low pressure to high pressure refrigerant gas. The gaseous refrigerant enters the condenser 33 and is condensed to become high pressure refrigerant liquid. The condenser 33 releases heat to the surroundings during condensation. The high pressure refrigerant liquid is throttled by the expansion valve 34 to become low pressure gas-liquid two-phase refrigerant. The low pressure gas-liquid two-phase refrigerant enters the evaporator 31 and is evaporated to become low pressure refrigerant gas, and then re-enters the compressor 32. The evaporator 31 absorbs heat from the surroundings during the evaporation process.

[0054] In one embodiment, based on the direct expansion cryogenic data collected in real time, the degree of control of the direct expansion cryogenic module includes:

[0055] Obtaining a first saturation temperature corresponding to the suction pressure and a second saturation temperature corresponding to the exhaust pressure; calculating superheat based on the first saturation temperature and the suction temperature;

[0056] The bypass valve opening is controlled according to the suction pressure and compressor inlet pressure parameters;

[0057] The opening of the expansion valve is controlled according to the superheat and the set superheat threshold;

[0058] Performing shutdown control on the compressor according to any one of the exhaust pressure, exhaust temperature and compressor current;

[0059] Based on the second saturation temperature, the opening degree of the chilled water valve is controlled according to the acquired target saturation temperature.

[0060] The specific process of degree control is described below:

[0061] Those skilled in the art can use existing calculation methods to convert the suction pressure into the first saturation temperature. The superheat is equal to the difference between the suction temperature and the first saturation temperature (superheat = suction temperature - first saturation temperature). Those skilled in the art can also use existing calculation methods to convert the exhaust pressure into the second saturation temperature.

[0062] According to the suction pressure and the compressor inlet pressure parameters, the bypass valve opening is controlled, including: when the suction pressure is greater than the pressure parameter of the compressor inlet, the bypass valve opening is increased until the suction pressure is equal to the pressure parameter of the compressor inlet; when the suction pressure is less than the pressure parameter of the compressor inlet, the bypass valve opening is reduced until the suction pressure is equal to the pressure parameter of the compressor inlet. It should be noted that the opening of the bypass valve can be determined according to the difference between the suction pressure and the pressure parameter of the compressor inlet. When the suction pressure changes, the first saturation temperature also changes randomly. The pressure parameter of the compressor inlet is the standard suction pressure (generally 0.1MPa).

[0063] According to the superheat and the set superheat threshold, the opening of the expansion valve is controlled, including: when the superheat is less than the set superheat threshold, the opening of the expansion valve is increased until the superheat is equal to the set superheat threshold; when the superheat is greater than the set superheat threshold, the opening of the expansion valve is reduced until the superheat is equal to the set superheat threshold. It should be noted that the opening of the expansion valve can be determined according to the difference between the superheat and the set superheat threshold. Those skilled in the art can set the superheat threshold according to actual needs, and the present invention does not limit this.

[0064] The compressor is shut down according to any one of the exhaust pressure, exhaust temperature and compressor current, including:

[0065] When the exhaust pressure is greater than the set exhaust pressure threshold, the control module controls the compressor to stop;

[0066] When the exhaust temperature is greater than the set exhaust temperature threshold, the control module controls the compressor to stop;

[0067] When the compressor current is greater than the set compressor current threshold, the control module controls the compressor to shut down. It should be noted that those skilled in the art can set the exhaust pressure threshold, exhaust temperature threshold and compressor current threshold according to actual needs, and the present invention does not limit this.

[0068] Based on the second saturation temperature and in accordance with the acquired target saturation temperature, the opening of the chilled water valve is controlled, including: the condenser is provided with chilled water, and when the second saturation temperature is high, the opening of the chilled water valve is increased until the second saturation temperature is equal to the target saturation temperature; when the second saturation temperature is low, the opening of the chilled water valve is reduced until the second saturation temperature is equal to the target saturation temperature.

[0069] It should be noted that those skilled in the art can set the target saturation temperature according to actual needs, and the present invention is not limited to this.

[0070] It should also be noted that by controlling the valves and compressor of the direct expansion cryogenic module accordingly according to the direct expansion cryogenic data, the energy consumption of the direct expansion cryogenic module is reduced, thereby reducing the energy consumption of the rotary dehumidification system.

[0071] It should be understood that the valve opening refers to the degree to which the valve is opened, usually expressed as a percentage, indicating the relative position of the valve from fully closed to fully open.

[0072] Preferably, considering that the direct expansion cryogenic data contains many types of data, including but not limited to the suction temperature, suction pressure, exhaust temperature, exhaust pressure and compressor current data, it is necessary to consider the strong coupling problem between the various control parameters, that is, the various control parameters and operating parameters influence and depend on each other, which is difficult to control independently, thus making the temperature and humidity control of the system complicated. In addition, since the technical solution of the embodiment of the present application is applied to the lithium battery production environment, and the energy consumption of temperature and humidity control in the lithium battery production environment is relatively high, the humidity requirement of the plant is proportional to the energy consumption of the dehumidification system, and the strong coupling makes it difficult to achieve precise control, thereby increasing energy consumption.

[0073] In view of this, the embodiment of the present application effectively improves the strong coupling problem between the various control parameters of the direct expansion cryogenic module by any of the following methods:

[0074] Method 1) Based on the fuzzy logic control method: the deviation of air temperature and humidity is input, and the opening of each valve in the direct expansion cryogenic module is output; through the membership function, the actually measured temperature and humidity values ​​are converted into input fuzzy values ​​(such as "high", "medium", "low"); based on the fuzzy rule base, the output fuzzy value is determined according to the input fuzzy value; the fuzzified output is converted into the opening of each valve in the direct expansion cryogenic module to control each valve in the direct expansion cryogenic module.

[0075] Specifically, the types of membership functions include, but are not limited to, triangular membership functions, trapezoidal membership functions, Gaussian membership functions, and the like. For example, temperature fuzzy sets such as "high", "medium", and "low" and humidity fuzzy sets such as "dry", "comfortable", and "humid" can be defined. For example, assuming that the actual measured value of the temperature is 25°C, a triangular membership function is used to define the membership of the three fuzzy sets of "low", "medium", and "high". If the peak value of the "low" set is at 20°C, the peak value of the "medium" set is at 25°C, and the peak value of the "high" set is at 30°C, then the membership of 25°C is 1 in the "medium" set, and gradually decreases to 0 in the "low" and "high" sets. The fuzzy rule base is used to describe the rules of the relationship between input variables and output variables. For example, a rule in the fuzzy rule base can be: if the temperature is high and the humidity is low, then the valve opening is "large", and through this rule, the output fuzzy value can be determined to be "large". The fuzzy rule base can be defined according to the process control of the above degree. Defuzzification methods such as the Centroid Method and the Bisector of a Line Method can be used to convert the fuzzy output into the opening of each valve in the direct expansion cryogenic module.

[0076] Method 2) Multi-input multi-output control method: construct a multi-input multi-output controller; among them, the multi-input multi-output controller can adopt the state space method. The basic principle of the state space method is that the relationship between the internal state of the system and the external input and output can be established through state variables and input variables. This relationship is usually described by state equations and output equations. The state equation describes the law of change of the system state over time, while the output equation establishes the relationship between the system state and the output. The deviation of air temperature and humidity is input into the controller, and the opening of each valve in the direct expansion cryogenic module is output to control each valve in the direct expansion cryogenic module.

[0077] Method 3) Based on dynamic modeling and temperature decoupling control method: establish a direct expansion cryogenic dynamic mechanism model to simulate the behavior of the direct expansion cryogenic module under different working conditions; the direct expansion cryogenic dynamic mechanism model includes: evaporator model, compressor model, condenser model, expansion valve model and various valve models. The direct expansion cryogenic dynamic mechanism model can describe the suction temperature, suction pressure, exhaust temperature, exhaust pressure and other data. Use experimental data (experimental data includes the opening data of each valve in the direct expansion cryogenic module and the temperature and humidity data of the air) to complete the model verification.

[0078] Figure 3 FIG. 1 is a flow chart of a control method of a rotary dehumidification system provided in an embodiment of the present application. Figure 3As shown, the control method of the rotary dehumidification system is applied to the rotary dehumidification system, the rotary dehumidification system is used to dehumidify outdoor fresh air, including: a processing air path, the processing air path is sequentially provided with a primary filter, a front surface cooler, a direct expansion cryogenic module, a dehumidification rotary wheel, a rear surface cooler and a filter along the wind direction, and the control method of the rotary dehumidification system includes:

[0079] Get the temperature and humidity of outdoor fresh air in real time;

[0080] Controlling the switch state of the front surface cooler according to the temperature of the outdoor fresh air obtained in real time and the set temperature threshold;

[0081] The switch state of the direct expansion cryogenic module is controlled according to the real-time acquired humidity of the outdoor fresh air and the set absolute moisture content threshold; during the operation of the direct expansion cryogenic module, the degree of the direct expansion cryogenic module is controlled based on the real-time collected direct expansion cryogenic data.

[0082] It should be understood that the specific implementation process of each step in the present method has been described in detail in the above system embodiment, and for the sake of brevity, it will not be repeated here.

[0083] In one embodiment, the direct expansion cryogenic module is composed of a direct expansion cryogenic main circuit and a bypass circuit; wherein the direct expansion cryogenic main circuit is composed of an evaporator, a compressor, a condenser and an expansion valve connected in sequence; the evaporator is arranged between the front surface cooler and the dehumidification wheel; one end of the bypass circuit is connected between the compressor and the condenser, and the other end is connected between the expansion valve and the evaporator; a bypass valve is arranged on the bypass circuit; and a chilled water valve is also arranged on the condenser.

[0084] In one embodiment, the direct expansion cryogenic data includes: intake temperature, intake pressure, exhaust temperature, exhaust pressure and current data of the compressor; wherein, the intake temperature is collected by a first temperature collection module; the intake pressure is collected by a first pressure collection module; the exhaust temperature is collected by a second temperature collection module; the exhaust pressure is collected by a second pressure collection module; the first temperature collection module and the first pressure collection module are arranged on the air inlet path of the compressor; the second temperature collection module and the second pressure collection module are arranged on the air outlet path of the compressor.

[0085] In one embodiment, the switch state of the front surface cooler is controlled according to the temperature of the outdoor fresh air obtained in real time and the set temperature threshold, including: when the temperature of the outdoor fresh air obtained in real time is greater than the set temperature threshold, turning on the front surface cooler; when the temperature of the outdoor fresh air obtained in real time is less than the set temperature threshold, turning off the front surface cooler.

[0086] In one embodiment, the switching state of the direct expansion cryogenic module is controlled according to the humidity of the outdoor fresh air obtained in real time and the set absolute moisture content threshold, including: when the humidity of the outdoor fresh air obtained in real time is less than the set absolute moisture content threshold, turning off the direct expansion cryogenic module; when the humidity of the outdoor fresh air obtained in real time is greater than the set absolute moisture content threshold, turning on the direct expansion cryogenic module.

[0087] In one embodiment, the direct expansion cryogenic module is controlled based on the direct expansion cryogenic data collected in real time, including: obtaining a first saturation temperature corresponding to the suction pressure and a second saturation temperature corresponding to the exhaust pressure; calculating the superheat based on the first saturation temperature and the suction temperature; controlling the opening of the bypass valve according to the suction pressure and the compressor inlet pressure parameters; controlling the opening of the expansion valve according to the superheat and a set superheat threshold; shutting down the compressor according to any one of the exhaust pressure, exhaust temperature and compressor current; and controlling the opening of the chilled water valve based on the second saturation temperature and the acquired target saturation temperature.

[0088] Figure 4 is a schematic block diagram of an electronic terminal provided in an embodiment of the present application. Figure 4 As shown, the electronic terminal includes: at least one processor 401, a memory 402, at least one network interface 403 and a user interface 405. The various components in the device are coupled together through a bus system 404. It can be understood that the bus system 404 is used to achieve connection and communication between these components. In addition to the data bus, the bus system 404 also includes a power bus, a control bus and a status signal bus. However, for the sake of clarity, Figure 4 In the specification, various buses are labeled as bus systems.

[0089] The user interface 405 may include a display, a keyboard, a mouse, a trackball, a click gun, keys, buttons, a touch pad or a touch screen.

[0090] It is understood that the memory 402 can be a volatile memory or a non-volatile memory, and can also include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), which is used as an external cache. By way of example but not limitation, many forms of RAM are available, such as static random access memory (SRAM), synchronous static random access memory (SSRAM). The memory described in the embodiments of the present invention is intended to include but is not limited to these and any other suitable categories of memory.

[0091] The memory 402 in the embodiment of the present invention is used to store various categories of data to support the operation of the electronic terminal 400. Examples of these data include: any executable program for operating on the electronic terminal 400, such as an operating system 4021 and an application 4022; the operating system 4021 includes various system programs, such as a framework layer, a core library layer, a driver layer, etc., for implementing various basic services and processing hardware-based tasks. The application 4022 may include various applications, such as a media player (Media Player), a browser (Browser), etc., for implementing various application services. The control method of the rotary dehumidification system provided in the embodiment of the present invention may be included in the application 4022.

[0092] The method disclosed in the above embodiment of the present invention can be applied to the processor 401, or implemented by the processor 401. The processor 401 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit in the processor 401 or the instruction in the form of software. The above processor 401 may be a general processor, a digital signal processor (DSP, Digital Signal Processor), or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The processor 401 can implement or execute the various methods, steps and logic block diagrams disclosed in the embodiment of the present invention. The general processor 401 may be a microprocessor or any conventional processor, etc. In combination with the steps of the accessory optimization method provided in the embodiment of the present invention, it can be directly embodied as a hardware decoding processor to execute, or it can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium, which is located in a memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0093] In an exemplary embodiment, the electronic terminal 400 may be implemented by one or more application specific integrated circuits (ASIC), DSP, programmable logic device (PLD), complex programmable logic device (CPLD) to execute the aforementioned method.

[0094] According to the method provided in the embodiment of the present application, the present application also provides a computer program product, which includes: a computer program code, when the computer program code is run on a computer, the computer executes Figure 3 A control method for the rotary dehumidification system in the illustrated embodiment.

[0095] According to the method provided in the embodiment of the present application, the present application also provides a computer-readable storage medium, which stores a program code, and when the program code is run on a computer, the computer executes Figure 3 A control method for the rotary dehumidification system in the illustrated embodiment.

[0096] The terms "component", "module", "system", etc. used in this specification are used to represent computer-related entities, hardware, firmware, a combination of hardware and software, software, or software in execution. For example, a component can be, but is not limited to, a process, a processor, an object, an executable file, an execution thread, a program and / or a computer running on a processor. By way of illustration, both applications and computing devices running on a computing device can be components. One or more components may reside in a process and / or an execution thread, and a component may be located on a computer and / or distributed between two or more computers. In addition, these components may be executed from various computer-readable media having various data structures stored thereon. Components may, for example, communicate through local and / or remote processes according to signals having one or more data packets (e.g., data from two components interacting with another component between a local system, a distributed system and / or a network, such as the Internet interacting with other systems through signals).

[0097] Those of ordinary skill in the art will appreciate that the various illustrative logical blocks and steps described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel may use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0098] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0099] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0100] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0101] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0102] In the above embodiments, the functions of each functional unit can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions (programs). When the computer program instructions (programs) are loaded and executed on a computer, the process or function according to the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website site, computer, server or data center to another website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that includes one or more available media integrated. Available media may be magnetic media (e.g., floppy disks, hard disks, tapes), optical media (e.g., high-density digital video discs (DVDs), or semiconductor media (e.g., solid state disks (SSDs)).

[0103] If the function 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, the technical solution of the present application, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, and other media that can store program codes.

[0104] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0105] In summary, the present application provides a rotary dehumidification system, control method, terminal, medium and program product, the system includes a processing air path and a control module; the processing air path is provided with a primary filter, a front surface cooler, a direct expansion cryogenic module, a dehumidification rotary wheel, a rear surface cooler and a filter in sequence along the wind direction; the control module is used to control the switch state of the front surface cooler according to the temperature of the outdoor fresh air obtained in real time and the set temperature threshold; it is also used to control the switch state of the direct expansion cryogenic module according to the humidity of the outdoor fresh air obtained in real time and the set absolute moisture content threshold; during the operation of the direct expansion cryogenic module, the degree of the direct expansion cryogenic module is controlled based on the direct expansion cryogenic data collected in real time. The present application reduces the humidity of the air entering the dehumidification rotary wheel through the direct expansion cryogenic module, thereby reducing the regeneration load of the rotary wheel, thereby reducing the energy consumption of the system. The present application also further reduces the energy consumption of the system through degree control. Therefore, the present application effectively overcomes the various shortcomings of the prior art and has a high industrial utilization value.

[0106] The above embodiments are merely illustrative of the principles and effects of the present application and are not intended to limit the present application. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed in the present application shall still be covered by the claims of the present application.

Claims

1. A rotary dehumidification system, characterized in that: Used to dehumidify outdoor fresh air, including: A processing air path, wherein the processing air path is provided with a primary filter, a front surface cooler, a direct expansion cryogenic module, a dehumidification wheel, a rear surface cooler and a filter in sequence along the wind direction; the front surface cooler and the direct expansion cryogenic module are respectively connected to a control module; Among them, the control module is used to control the switching state of the front surface cooler according to the real-time acquired temperature of the outdoor fresh air and the set temperature threshold; it is also used to control the switching state of the direct expansion cryogenic module according to the real-time acquired humidity of the outdoor fresh air and the set absolute moisture content threshold; during the operation of the direct expansion cryogenic module, the degree of the direct expansion cryogenic module is controlled based on the real-time collected direct expansion cryogenic data.

2. The rotary dehumidification system according to claim 1, characterized in that: The direct expansion cryogenic module is composed of a direct expansion cryogenic main circuit and a bypass circuit; Among them, the direct expansion cryogenic main circuit is composed of an evaporator, a compressor, a condenser and an expansion valve connected in sequence; the evaporator is arranged between the front surface cooler and the dehumidification wheel; one end of the bypass circuit is connected between the compressor and the condenser, and the other end is connected between the expansion valve and the evaporator; a bypass valve is arranged on the bypass circuit; and a chilled water valve is also arranged on the condenser.

3. The rotary dehumidification system according to claim 2, characterized in that: The direct expansion cryogenic data include: suction temperature, suction pressure, exhaust temperature, exhaust pressure and compressor current data; Wherein, the intake temperature is collected by the first temperature collection module; the intake pressure is collected by the first pressure collection module; the exhaust temperature is collected by the second temperature collection module; the exhaust pressure is collected by the second pressure collection module; The first temperature acquisition module and the first pressure acquisition module are arranged on the air inlet path of the compressor; the second temperature acquisition module and the second pressure acquisition module are arranged on the air outlet path of the compressor.

4. The rotary dehumidification system according to claim 1, characterized in that: According to the temperature of the outdoor fresh air obtained in real time and the set temperature threshold, the switch state of the front surface cooler is controlled, including: When the temperature of the outdoor fresh air obtained in real time is greater than the set temperature threshold, the front surface cooler is turned on; When the temperature of the outdoor fresh air obtained in real time is lower than the set temperature threshold, the front surface cooler is turned off.

5. The rotary dehumidification system according to claim 1, characterized in that: According to the real-time acquired humidity of the outdoor fresh air and the set absolute moisture content threshold, the switch state of the direct expansion cryogenic module is controlled, including: When the humidity of the outdoor fresh air obtained in real time is less than the set absolute humidity threshold, the direct expansion cryogenic module is turned off; When the humidity of the outdoor fresh air obtained in real time is greater than the set absolute moisture content threshold, the direct expansion cryogenic module is turned on.

6. The rotary dehumidification system according to claim 3, characterized in that: Based on the real-time collected direct expansion cryogenic data, the degree of control of the direct expansion cryogenic module is performed, including: Obtaining a first saturation temperature corresponding to the suction pressure and a second saturation temperature corresponding to the exhaust pressure; calculating superheat based on the first saturation temperature and the suction temperature; The bypass valve opening is controlled according to the suction pressure and compressor inlet pressure parameters; The opening of the expansion valve is controlled according to the superheat and the set superheat threshold; Performing shutdown control on the compressor according to any one of the exhaust pressure, exhaust temperature and compressor current; Based on the second saturation temperature, the opening degree of the chilled water valve is controlled according to the acquired target saturation temperature.

7. A control method for a rotary dehumidification system, characterized in that: Applied to a rotary dehumidification system, the rotary dehumidification system is used to dehumidify outdoor fresh air, including: a processing air path, wherein the processing air path is provided with a primary filter, a front surface cooler, a direct expansion cryogenic module, a dehumidification rotary wheel, a rear surface cooler and a filter in sequence along the wind direction; the control method includes: Get the temperature and humidity of outdoor fresh air in real time; Controlling the switch state of the front surface cooler according to the temperature of the outdoor fresh air obtained in real time and the set temperature threshold; The switch state of the direct expansion cryogenic module is controlled according to the real-time acquired humidity of the outdoor fresh air and the set absolute moisture content threshold; during the operation of the direct expansion cryogenic module, the degree of the direct expansion cryogenic module is controlled based on the real-time collected direct expansion cryogenic data.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method of claim 7 is implemented.

9. A computer program product, characterized in that The computer program product comprises a computer program code, and when the computer program code is run on a computer, the computer is enabled to implement the method according to claim 7.

10. An electronic terminal comprising a memory, a processor and a computer program stored in the memory, characterized in that: The processor executes the computer program to implement the method of claim 7.

Images