Direct expansion cryogenic pre-dehumidification and heat pump regeneration combined low-dew-point double-rotating-wheel dehumidification system, control method and terminal

Abstract

According to the direct-expansion cryogenic pre-dehumidification and heat pump regeneration combined low-dew-point double-rotating-wheel dehumidification system, the control method and the terminal, accurate regulation and control of all devices in the rotating-wheel dehumidification system are achieved according to data collected by the sensor module in real time, and therefore the stability of the air supply dew-point temperature is ensured. By adopting the direct expansion cryogenic technology, the dehumidification burden of the rotating wheel is effectively relieved, and the regeneration temperature is reduced, so that the energy consumption in the regeneration process is remarkably reduced. The regeneration heat pump condenser is installed at the inlet of the rotating wheel, part of regeneration heat can be borne, and regeneration energy consumption is further reduced. A regeneration heat pump evaporator is further installed at an exhaust outlet of the rotating wheel, heat in regeneration exhaust can be recycled, and the purpose of saving energy is achieved. According to the rotating wheel dehumidification system, dual optimization of dehumidification performance and energy consumption performance is achieved, the dehumidification efficiency is remarkably improved, and the energy consumption of the system is reduced.

Description

Technical Field

[0001] The present application relates to the field of industrial dehumidification technology, and in particular to a low dew point double-rotor dehumidification system, a control method and a terminal combining direct expansion cryogenic pre-dehumidification and heat pump regeneration. Background Art

[0002] Lithium-ion batteries, with their key position in the field of clean energy, have shown extremely broad application prospects in many fields such as power, energy storage and consumption. They have gradually become an important energy pillar for building a carbon-free society and effectively responding to climate change, and are currently in a stage of rapid development.

[0003] In the production and manufacturing process of lithium batteries, many links have strict requirements on the production environment. Among them, lithium elements, due to their highly active chemical properties, will undergo a chemical reaction to precipitate hydrogen when in contact with water and reach specific temperature conditions, which may cause combustion; especially in a molten state, the reaction between lithium and water is more violent, and there is even a risk of explosion. Based on this, in the entire manufacturing process of lithium batteries, it is very important to strictly control the air humidity of the production environment. In addition, the requirements for humidity control vary depending on the production process. For example, in the key link of the liquid injection process, in order to ensure the performance and quality of lithium batteries, the dew point temperature must be accurately controlled within an extremely low range of -45°C or even -60°C; in some other process stages, the air supply dew point temperature may be required to be maintained in a suitable range of around -30°C or higher.

[0004] Faced with such stringent low dew point air supply requirements, traditional refrigeration dehumidification systems and single-rotor dehumidification systems cannot meet actual needs. In order to overcome this technical difficulty, the industry usually adopts refrigeration dehumidification and two-zone rotors and three-zone rotors in sequence to achieve the required air supply dew point temperature. However, since the rotor regeneration requires a very high temperature, the regeneration energy required by the two-stage rotor dehumidification system is very high, resulting in the operating energy consumption of the dehumidification and drying system accounting for more than 40% of the entire lithium battery production line, and the regeneration energy consumption accounts for more than 45% of the energy consumption of the rotor dehumidification system. Therefore, how to reduce the energy consumption of the rotor dehumidification system and improve energy utilization efficiency has become a key technical problem that needs to be solved in the current lithium battery production field. Summary of the invention

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides a low dew point dual-rotor dehumidification system, a control method and a terminal combining direct expansion cryogenic pre-dehumidification and heat pump regeneration, which are used to solve the problem of how to reduce the energy consumption of the rotary dehumidification system.

[0006] To achieve the above-mentioned purpose and other related purposes, the first aspect of the present application provides a low dew point double-rotor dehumidification system combining direct expansion cryogenic pre-dehumidification and heat pump regeneration, the system comprising: a treatment flow path, a regeneration flow path, a direct expansion cryogenic module, a first regeneration heat pump module, a second regeneration heat pump module and a control module; an outlet is arranged on the treatment flow path to lead out the regeneration flow path through the outlet; the direct expansion cryogenic module is arranged on the treatment flow path; the first regeneration heat pump module and the second regeneration heat pump module are arranged on the regeneration flow path; wherein the treatment flow path comprises: initial dehumidification and heat pump pre-dehumidification are arranged in sequence along the wind direction; the first regeneration heat pump module and the second regeneration heat pump module are arranged on the regeneration flow path ... The air flow path is formed by a high-efficiency filter, a front surface cooler, a treatment area of ​​a first-stage rotor, a blower, a middle surface cooler, a treatment area of ​​a second-stage rotor, a post-heater and a medium-efficiency filter; the direct expansion cryogenic module is arranged between the front surface cooler and the treatment area of ​​the first-stage rotor; the front surface cooler is connected to the direct expansion cryogenic module; a third regulating water valve is arranged on the middle surface cooler; a treatment flow path sensor module is arranged on the treatment flow path for real-time collection of temperature and humidity data and dew point temperature data on the treatment flow path; the regeneration flow path includes: a preheating and dehumidification area of ​​a second-stage rotor, a second regeneration heater, The regeneration zone of the secondary rotor, the second regeneration fan, the first regeneration heater, the regeneration zone of the primary rotor and the first regeneration fan form a regeneration air path; the regeneration flow path is respectively connected to the first regeneration heat pump module and the second regeneration heat pump module; a regeneration air supply inlet is provided between the second regeneration fan and the first regeneration heater; a regeneration air supply filter is provided on the regeneration air supply inlet; a regeneration flow path sensor module is provided on the regeneration flow path for real-time collection of temperature and humidity data and dew point temperature data on the regeneration flow path; the control module is respectively connected to the processing flow path sensor module and the regeneration flow path sensor module The communication connection is used to control the operating status of the front surface cooler and the direct expansion cryogenic module according to the temperature and humidity data and dew point temperature data collected in real time by the processing flow path sensor module and the regeneration flow path sensor module, so that the fresh air temperature entering the processing area of ​​the first-stage rotor meets the preset fresh air temperature requirement; control the opening of the third regulating water valve of the middle surface cooler so that the air outlet temperature of the middle surface cooler meets the preset air outlet temperature requirement; adjust the operating power of the first regeneration heater and the second regeneration heater so that the air outlet dew point temperature of the processing area of ​​the first-stage rotor and the processing area of ​​the second-stage rotor meets the preset dew point temperature requirement.

[0007] In some embodiments of the first aspect of the present application, the direct expansion cryogenic module includes: a direct expansion compressor, a direct expansion evaporator, a direct expansion condenser and a direct expansion throttling device; wherein the direct expansion evaporator is arranged on the processing air path between the front surface cooler and the processing area of ​​the first-stage wheel; the direct expansion evaporator is respectively connected to the direct expansion compressor and the direct expansion throttling device; the direct expansion condenser is respectively connected to the direct expansion compressor and the direct expansion throttling device; the direct expansion condenser is also connected to the front surface cooler; a first regulating water valve is arranged between the direct expansion condenser and the front surface cooler; and a second regulating water valve is arranged on the front surface cooler.

[0008] In some embodiments of the first aspect of the present application, the second regenerative heat pump module includes: a second regenerative heat pump compressor, a second regenerative heat pump evaporator, a second regenerative heat pump condenser and a second regenerative heat pump throttling device; wherein the second regenerative heat pump evaporator is arranged between the second regenerative fan and the regenerative air inlet; the second regenerative heat pump condenser is arranged between the preheating and dehumidification zone of the secondary wheel and the second regenerative heater; the second regenerative heat pump compressor is respectively connected to the second regenerative heat pump evaporator and the second regenerative heat pump condenser; the second regenerative heat pump throttling device is respectively connected to the second regenerative heat pump evaporator and the second regenerative heat pump condenser.

[0009] In some embodiments of the first aspect of the present application, the first regenerative heat pump module includes: a first regenerative heat pump compressor, a first regenerative heat pump evaporator, a first regenerative heat pump condenser and a first regenerative heat pump throttling device; wherein, the first regenerative heat pump evaporator is arranged on the air supply path of the first regenerative fan; the first regenerative heat pump condenser is arranged between the regenerative air supply inlet and the first regenerative heater; the first regenerative heat pump compressor is respectively connected to the first regenerative heat pump evaporator and the first regenerative heat pump condenser; the first regenerative heat pump throttling device is respectively connected to the first regenerative heat pump evaporator and the first regenerative heat pump condenser.

[0010] In some embodiments of the first aspect of the present application, the processing flow path sensor module includes: a first humidity sensor and a first temperature sensor arranged between the fresh air inlet end and the primary filter on the processing air path; a second temperature sensor arranged between the front surface cooler and the direct expansion evaporator; a second humidity sensor and a third temperature sensor arranged between the direct expansion evaporator and the processing area of ​​the first-stage wheel; a first dew point sensor and a fourth temperature sensor arranged between the processing area of ​​the first-stage wheel and the air blower; a fifth temperature sensor arranged between the middle surface cooler and the outlet; and a second dew point sensor and a sixth temperature sensor arranged on the air outlet path of the middle efficiency filter.

[0011] In some embodiments of the first aspect of the present application, the regeneration flow path sensor module includes: a third dew point sensor and a seventh temperature sensor arranged between the preheating and dehumidification zone of the secondary rotor and the second regeneration heat pump condenser; an eighth temperature sensor arranged between the second regeneration heat pump condenser and the second regeneration heater; a ninth temperature sensor arranged between the second regeneration heater and the regeneration zone of the secondary rotor; a fourth dew point sensor and a tenth temperature sensor arranged between the second regeneration fan and the second regeneration heat pump evaporator; a third humidity sensor and an eleventh temperature sensor arranged at the regeneration air inlet; a fourth humidity sensor and a twelfth temperature sensor arranged between the regeneration air filter and the first regeneration heat pump condenser; a thirteenth temperature sensor arranged between the first regeneration heat pump condenser and the first regeneration heater; a fourteenth temperature sensor arranged between the first regeneration heater and the regeneration zone of the primary rotor; a fifth humidity sensor and a fifteenth temperature sensor arranged between the first regeneration fan and the first regeneration heat pump evaporator; and a sixth humidity sensor and a sixteenth temperature sensor arranged on the air outlet path of the first regeneration heat pump evaporator.

[0012] In some embodiments of the first aspect of the present application, the operating states of the front surface cooler and the direct expansion cryogenic module are controlled so that the fresh air temperature entering the processing area of ​​the first-stage rotor meets the preset fresh air temperature requirement, specifically including the following situations: Situation 1: If the fresh air temperature at the fresh air inlet end acquired in real time by the first temperature sensor is less than the first preset fresh air temperature value, the front surface cooler and the direct expansion cryogenic module are controlled to stop working, and the fresh air temperature meets the preset fresh air temperature requirement; Situation 2: If the fresh air temperature at the fresh air inlet end acquired in real time by the first temperature sensor is greater than or equal to the first preset fresh air temperature value The fresh air temperature is less than or equal to the second preset fresh air temperature value, the front surface cooler is controlled to stop working, and the fresh air enters the direct expansion cryogenic module for cooling to reduce the fresh air temperature to the first preset fresh air temperature value, so that the fresh air temperature meets the preset fresh air temperature requirement; Situation 3: If the fresh air temperature at the fresh air inlet end collected in real time by the first temperature sensor is greater than the second preset fresh air temperature value, the front surface cooler and the direct expansion cryogenic module are controlled to work, and the fresh air is cooled in turn, so that the fresh air is cooled and the fresh air temperature is reduced to the first preset fresh air temperature value, and the fresh air temperature meets the preset fresh air temperature requirement.

[0013] In some embodiments of the first aspect of the present application, the operating power of the first regeneration heater and the second regeneration heater are adjusted so that the outlet dew point temperatures of the processing zone of the first-stage rotor and the processing zone of the second-stage rotor meet the preset dew point temperature requirements, specifically including: if the outlet dew point temperature of the processing zone of the first-stage rotor collected in real time by the first dew point sensor does not meet the preset dew point temperature requirements, then the operating power of the first regeneration heater is controlled to change the regeneration temperature of the regeneration zone of the first-stage rotor, thereby driving the outlet dew point temperature of the processing zone of the first-stage rotor to change until it meets the preset dew point temperature requirements; if the outlet dew point temperature of the processing zone of the second-stage rotor collected in real time by the second dew point sensor does not meet the preset dew point temperature requirements, then the operating power of the second regeneration heater is controlled to change the regeneration temperature of the regeneration zone of the second-stage rotor, thereby driving the outlet dew point temperature of the processing zone of the second-stage rotor to change until it meets the preset dew point temperature requirements.

[0014] To achieve the above-mentioned purpose and other related purposes, the second aspect of the present application provides a control method for a low dew point dual-rotor dehumidification system combining direct expansion cryogenic pre-dehumidification and heat pump regeneration, which is applied to the low dew point dual-rotor dehumidification system combining direct expansion cryogenic pre-dehumidification and heat pump regeneration as described above, and the control method includes: acquiring the temperature and humidity data and dew point temperature data collected in real time by the processing flow path sensor module and the regeneration flow path sensor module; controlling the operating status of the front surface cooler and the direct expansion cryogenic module according to the temperature and humidity data and dew point temperature data collected in real time by the processing flow path sensor module and the regeneration flow path sensor module, so that the fresh air temperature entering the processing area of ​​the first-stage wheel meets the preset fresh air temperature requirement; controlling the opening of the third regulating water valve of the middle surface cooler, so that the outlet air temperature of the middle surface cooler meets the preset outlet air temperature requirement; adjusting the operating power of the first regeneration heater and the second regeneration heater, so that the outlet air dew point temperature of the processing area of ​​the first-stage wheel and the processing area of ​​the second-stage wheel meets the preset dew point temperature requirement.

[0015] 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 low dew point dual-rotor dehumidification method of the combination of deep cooling direct expansion pre-dehumidification and heat pump regeneration.

[0016] As described above, the low dew point double-rotor dehumidification system, control method and terminal of the direct expansion cryogenic pre-dehumidification and heat pump regeneration combination provided by the present application have the following beneficial effects:

[0017] The present invention realizes precise control of each device in the rotary dehumidification system according to the data collected in real time by the sensor module, thereby ensuring the stability of the dew point temperature of the supply air. The present invention effectively reduces the dehumidification burden of the rotary wheel and reduces the regeneration temperature by adopting direct expansion cryogenic technology, thereby significantly reducing the energy consumption in the regeneration process. The present invention installs a regenerative heat pump condenser at the inlet of the rotary wheel, which can bear part of the regeneration heat and further reduce the regeneration energy consumption. The present invention also installs a regenerative heat pump evaporator at the exhaust outlet of the rotary wheel, which can recycle and utilize the heat in the regenerated exhaust air, thereby achieving the purpose of energy saving. The rotary dehumidification system of the present invention achieves dual optimization of dehumidification performance and energy consumption performance, significantly improves dehumidification efficiency and reduces system energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Shown is a schematic structural diagram of a low dew point dual-rotor dehumidification system combining direct expansion cryogenic pre-dehumidification and heat pump regeneration in one embodiment of the present application.

[0019] Figure 2 Shown is a flow chart of a method for controlling a low dew point dual-rotor dehumidification system combining direct expansion cryogenic pre-dehumidification and heat pump regeneration in one embodiment of the present application.

[0020] Figure 3 Shown is a schematic diagram of the structure of an electronic terminal in one embodiment of the present application. DETAILED DESCRIPTION

[0021] 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.

[0022] In the embodiments of the present application, words such as "first" and "second" are used to distinguish the same or similar items with substantially the same functions and effects, and do not limit their order. 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.

[0023] 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.

[0024] In the embodiments of the present application, "at least one" refers to one or more, and "more than one" 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: the existence of A alone, the existence of A and B at the same time, and the existence of B 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.

[0025] To facilitate understanding of the embodiments of the present application, first Figure 1 Detailed description. Figure 1 The schematic diagram of the structure of a low dew point double-rotor dehumidification system combining direct expansion cryogenic pre-dehumidification and heat pump regeneration in an embodiment of the present invention is shown.

[0026] The system includes: a treatment flow path, a regeneration flow path, a direct expansion cryogenic module, a first regeneration heat pump module, a second regeneration heat pump module and a control module; an outlet A is provided on the treatment flow path to lead out the regeneration flow path through the outlet A; the direct expansion cryogenic module is provided on the treatment flow path; the first regeneration heat pump module and the second regeneration heat pump module are provided on the regeneration flow path.

[0027] Among them, the processing flow path includes: a primary filter 1, a front surface cooler 2, a processing area 4 of a first-stage rotor, a blower 5, a middle surface cooler 6, a processing area 7 of a second-stage rotor, a rear heater 8 and a medium-efficiency filter 9 are arranged in sequence along the wind direction, thereby forming a processing air path; the direct expansion cryogenic module is arranged between the front surface cooler 2 and the processing area 4 of the first-stage rotor; the front surface cooler 2 is connected to the direct expansion cryogenic module; a third regulating water valve 61 is arranged on the middle surface cooler 6; a processing flow path sensor module is arranged on the processing flow path, which is used to collect temperature and humidity data and dew point temperature data on the processing flow path in real time.

[0028] The temperature and humidity data include temperature data and humidity data, which are measured by temperature sensors and humidity sensors respectively. The temperature sensor measures the temperature of the environment, while the humidity sensor measures the water vapor content in the air through capacitance, resistance or optical principles. Dew point temperature data refers to the dew point temperature, which is measured by a dew point sensor. The dew point temperature is the temperature when water vapor in the air condenses into dewdrops, and is an important indicator for measuring air humidity. Compared with ordinary humidity sensors, dew point sensors usually have higher measurement accuracy and sensitivity, and are more suitable for measurements in low humidity environments.

[0029] In the processing flow path, outdoor fresh air enters from the fresh air inlet, passes through the primary filter 1 and enters the front surface cooler 2, which cools and dehumidifies the filtered fresh air, and then the direct expansion deep cooling module further cools and dehumidifies the fresh air, and enters the processing area 4 of the first-stage rotor for adsorption dehumidification. The air supply fan 5 transports the air after adsorption and dehumidification to the middle surface cooler 6, which cools the air. The cooled air is divided into two parts through the outlet A, one part enters the processing area 7 of the second-stage rotor for deep dehumidification, so that the air reaches the preset outlet dew point temperature requirement, and the post-heater 8 heats the air that reaches the preset outlet dew point temperature requirement to meet the supply air temperature requirement, and finally the supply air is filtered through the medium efficiency filter 9 and sent to the drying room.

[0030] In a specific embodiment, the primary filter 1 and the medium filter 9 are used to filter the passing air. The filter in the dehumidification system purifies the gas through the porous filter material to ensure the air cleanliness in the process workshop or other application places. It is divided into a primary filter and a medium filter according to the filtering effect. Some impurities in the air can be filtered through the primary filter and the medium filter.

[0031] The primary filter is a simple and basic filter with a filtration efficiency of less than 90%. It mainly includes primary plate filters, primary pleated filters, primary bag filters, metal mesh regeneration filters, etc. The filtration efficiency of medium efficiency filters is between 90% and 95%, mainly including medium efficiency bag filters, glass fiber filters, etc. Compared with primary filters, medium efficiency filters have better filtering effects, more stability, and longer service life. The use of a combination of filters with different efficiencies in the dehumidification system, that is, the use of primary filters and medium efficiency filters at the same time, can filter the air well and meet the purification requirements to ensure that the dehumidifier can work properly.

[0032] The main function of the front cooler 2 is to cool and dehumidify the air sent to the process workshop or other production workshops. The front cooler is used to cool and dehumidify the outdoor fresh air, control the temperature and humidity of the air supply, and make the treated air reach a relatively low temperature and low humidity state before entering the next step. The middle cooler 6 is used to further dehumidify and cool the treated air on the process flow path.

[0033] The regeneration flow path includes: a preheating and dehumidification zone 21 with a secondary rotor, a second regeneration heater 11, a regeneration zone 12 of the secondary rotor, a second regeneration fan 13, a first regeneration heater 16, a regeneration zone 17 of the primary rotor and a first regeneration fan 18, which are arranged in sequence along the wind direction, thereby forming a regeneration wind path; the regeneration flow path is respectively connected to the first regeneration heat pump module and the second regeneration heat pump module; a regeneration air inlet B is provided between the second regeneration fan 13 and the first regeneration heater 16; a regeneration air filter 20 is provided on the regeneration air inlet B; a regeneration flow path sensor module is provided on the regeneration flow path, which is used to collect temperature and humidity data and dew point temperature data on the regeneration flow path in real time.

[0034] In the regeneration flow path, the air is divided into two parts through the outlet A, and the other part enters the preheating and dehumidification zone 21 of the secondary wheel. The preheating and dehumidification zone 21 of the secondary wheel preheats and pre-deshumidifies the air, and then the second regeneration heater 11 heats the regeneration air. After heating, the regeneration air enters the regeneration zone 12 of the secondary wheel to desorb the water vapor adsorbed on the secondary wheel, thereby realizing the regeneration of the dehumidification capacity of the secondary wheel, and the second regeneration fan 13 outputs the regeneration exhaust air.

[0035] The regeneration air supply inlet B is arranged on the air outlet path of the second regeneration fan 13, and is provided with a regeneration air supply filter 20. After a portion of the regeneration fresh air is supplied through the regeneration air supply inlet B, the regeneration fresh air is filtered through the regeneration air supply filter 20 to better match the air volume required by the regeneration zone 17 of the primary rotor. The first regeneration heater 16 heats the primary regeneration air generated by the mixture of the regeneration exhaust air of the second regeneration fan 13 and the supplied regeneration fresh air, and after heating to the required regeneration temperature, the primary regeneration air enters the regeneration zone 17 of the primary rotor, desorbs the water vapor adsorbed on the primary rotor, and then transmits the regeneration exhaust air to the outside through the first regeneration fan 18.

[0036] The control module is respectively communicated with the processing flow path sensor module and the regeneration flow path sensor module, and the control module is also respectively communicated with each device in the dehumidification system, and is used to control the operating status of the front surface cooler 2 and the direct expansion cryogenic module according to the temperature and humidity data and dew point temperature data collected in real time by the processing flow path sensor module and the regeneration flow path sensor module, so that the fresh air temperature entering the processing area 4 of the first-stage wheel meets the preset fresh air temperature requirement; control the opening of the third regulating water valve of the middle surface cooler 6 so that the outlet air temperature of the middle surface cooler 6 meets the preset outlet air temperature requirement; adjust the operating power of the first regeneration heater 16 and the second regeneration heater 11, so that the outlet air dew point temperature of the processing area 4 of the first-stage wheel and the processing area 7 of the second-stage wheel meets the preset dew point temperature requirement.

[0037] It should be noted that the control module receives the real-time monitored temperature and humidity data and dew point temperature data of the processing flow sensor module and the regeneration flow sensor module, and sends control signals according to the temperature and humidity data and the dew point temperature data to control the adjustment of the corresponding devices in the dehumidification system to meet the design requirements. For example, according to the value of the fresh air temperature and humidity at the fresh air inlet, it is determined whether to turn on the front cooler 2 or the direct expansion cryogenic module to pre-cool and dehumidify the fresh air; the temperature sensor behind the front cooler 2 and the second regulating water valve of the front cooler 2 are linked to achieve precise control of the outlet temperature of the front cooler 2 by adjusting the water flow of the front cooler 2; the temperature sensor behind the direct expansion evaporator controls the operating state of the direct expansion cryogenic module, so that the temperature control of the treatment area 4 entering the first-stage rotor is more precise.

[0038] It should be noted that Figure 1 The arrows in the diagram indicate the direction of air flow.

[0039] It should be noted that both the primary wheel and the secondary wheel are dehumidification wheels, which are the main components of the wheel dehumidification system. The surface of the dehumidification wheel is coated with a hygroscopic medium and is provided with honeycomb multi-porous channels. 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 dehumidifying the air.

[0040] The primary wheel in this embodiment is divided into a processing zone 4 of the primary wheel and a regeneration zone 17 of the primary wheel. The fresh air entering the primary wheel first passes through the processing zone 4 of the primary wheel, and the moisture therein is adsorbed by the hygroscopic medium on the wheel, and the humidity of the fresh air is reduced. Then, the primary wheel rotates slowly and continuously and enters the regeneration zone 17 of the primary wheel. At this time, the high temperature of the regenerated air can dehydrate the hygroscopic medium in the primary wheel and take away the water vapor by the regenerated air, and then the regenerated air after absorbing the moisture is discharged, thereby playing the role of regenerating the primary wheel to maintain the dehumidification capacity of the primary wheel.

[0041] The secondary rotor in this embodiment is divided into a treatment zone 7 of the secondary rotor, a preheating and dehumidifying zone 21 of the secondary rotor, and a regeneration zone 12 of the secondary rotor. The treatment zone 7 of the secondary rotor further dehumidifies the air to reach the required dew point temperature. The preheating and dehumidifying zone 21 of the secondary rotor preheats and pre-dehumidifies the air to the regeneration flow path. The regeneration zone 12 of the secondary rotor desorbs the water vapor adsorbed on the secondary rotor to maintain the dehumidification capacity of the secondary rotor.

[0042] In one embodiment, if Figure 1 As shown, the direct expansion cryogenic module includes: a direct expansion compressor 32, a direct expansion evaporator 3, a direct expansion condenser 31 and a direct expansion throttling device 33; wherein the direct expansion evaporator 3 is arranged on the treatment air path between the front surface cooler 2 and the treatment area 4 of the first-stage wheel; the direct expansion evaporator 3 is respectively connected to the direct expansion compressor 32 and the direct expansion throttling device 33; the direct expansion condenser 31 is respectively connected to the direct expansion compressor 32 and the direct expansion throttling device 33; the direct expansion condenser 31 is also connected to the front surface cooler 2; a first regulating water valve 34 is arranged between the direct expansion condenser 31 and the front surface cooler 2; and a second regulating water valve 35 is arranged on the front surface cooler 2.

[0043] The direct expansion evaporator 3 in the direct expansion cryogenic module is located on the air outlet path of the front surface cooler 2. The direct expansion evaporator 3 absorbs heat through the expansion and evaporation of the low-temperature and low-pressure refrigerant inside it, thereby achieving the effect of cooling and dehumidifying the air. The direct expansion compressor 32 is the power source of the refrigeration cycle, responsible for compressing the low-temperature and low-pressure refrigerant gas into a high-temperature and high-pressure refrigerant gas. The direct expansion condenser 31 is a component for cooling the refrigerant, cooling the high-temperature and high-pressure refrigerant gas into a high-pressure liquid refrigerant to prepare for the next round of evaporation. The direct expansion throttling device 33 is used to adjust the flow rate of the refrigerant and control the pressure and temperature in the direct expansion evaporator, that is, throttling and reducing the pressure of the high-pressure liquid refrigerant to turn it into a low-temperature and low-pressure refrigerant.

[0044] In this embodiment, the direct expansion condenser 31 is connected to the front surface cooler 2, and the return chilled water of the front surface cooler 2 is used as the condensing medium. By utilizing the return water of the front surface cooler for cooling, a part of the coldness in the return water is recovered, thereby reducing dependence on external cooling resources and reducing energy consumption.

[0045] During the operation of the direct expansion cryogenic module, the low-temperature and low-pressure refrigerant absorbs the heat of the outlet air of the front surface cooler 2 in the direct expansion evaporator 3 and evaporates. The direct expansion compressor 32 sucks in the low-temperature and low-pressure refrigerant gas, compresses it into a high-temperature and high-pressure refrigerant gas, and enters the direct expansion condenser 31. The direct expansion condenser 31 uses return water to cool the high-temperature and high-pressure refrigerant gas to obtain a high-pressure liquid refrigerant. After being throttled and reduced in pressure by the direct expansion throttling device 33 to become a low-temperature and low-pressure refrigerant, it re-enters the direct expansion evaporator 3, thereby circulating to achieve the cooling of the air passing through the direct expansion evaporator 3.

[0046] It should be emphasized that the direct expansion cryogenic module adopts direct expansion cryogenic technology, which plays a role of pre-cooling and dehumidification in this embodiment. The direct expansion evaporator 3 performs a pre-cooling operation on the air that is about to enter the first-stage rotor, effectively reducing the temperature and humidity of the air, thereby reducing the dehumidification burden of the first-stage rotor. As the wet load borne by the first-stage rotor decreases, the temperature required for its regeneration also decreases, which is very beneficial to reducing regeneration energy consumption. In addition, after pre-cooling and dehumidification, the first-stage rotor operates under conditions of lower temperature and humidity, and the dehumidification efficiency is significantly improved. The air that has been pre-cooled and dehumidified by the evaporator enters the first-stage rotor, and the first-stage rotor further removes the remaining moisture therein. The direct expansion evaporator 3 cooperates with the first-stage rotor to achieve efficient dehumidification.

[0047] The application of direct expansion cryogenic technology effectively reduces the temperature required for the regeneration of the first-stage rotor and significantly reduces the energy consumption during the regeneration process. At the same time, thanks to the improvement in dehumidification efficiency, the overall energy consumption of the rotary dehumidification system is also reduced. By accurately controlling the temperature and pressure inside the direct expansion evaporator 3 and the cooling effect of the direct expansion condenser 31, the dehumidification performance of the rotary dehumidification system can be further enhanced, the energy consumption performance can be optimized, and a more efficient and energy-saving operation state can be achieved.

[0048] In one embodiment, if Figure 1 As shown, the second regenerative heat pump module includes: a second regenerative heat pump compressor 101, a second regenerative heat pump evaporator 14, a second regenerative heat pump condenser 10 and a second regenerative heat pump throttling device 102; wherein, the second regenerative heat pump evaporator 14 is arranged between the second regenerative fan 13 and the regeneration air inlet B; the second regenerative heat pump condenser 10 is arranged between the preheating and dehumidification zone 21 of the secondary wheel and the second regeneration heater 11; the second regenerative heat pump compressor 101 is respectively connected to the second regenerative heat pump evaporator 14 and the second regenerative heat pump condenser 10; the second regenerative heat pump throttling device 102 is respectively connected to the second regenerative heat pump evaporator 14 and the second regenerative heat pump condenser 10.

[0049] It should be noted that the second regenerative heat pump condenser 10 and the second regenerative heat pump evaporator 14 in the second regenerative heat pump module are located on the regeneration flow path, that is, on the regeneration air path. The second regenerative heat pump condenser 10 releases heat through high-temperature and high-pressure refrigerant vapor and condenses into refrigerant liquid, and the released heat is released into the regeneration air to preheat the regeneration air. The refrigerant in the second regenerative heat pump evaporator 14 absorbs the heat in the regeneration exhaust air of the regeneration zone of the secondary rotor and evaporates, thereby realizing heat recovery.

[0050] The second regenerative heat pump compressor 101 is used to provide the pressure and power required for the circulation of the second regenerative heat pump module, by sucking low-temperature and low-pressure refrigerant vapor and then compressing it to raise it to high-temperature and high-pressure refrigerant vapor, providing heat energy for the subsequent condensation process of the condenser. The second regenerative heat pump throttling device 102 is used to adjust the flow of the refrigerant to control the pressure and temperature in the second regenerative heat pump evaporator 14. By accurately controlling the opening, it can ensure that the second regenerative heat pump module operates under stable conditions and optimizes the energy efficiency ratio.

[0051] It should be emphasized that the second regenerative heat pump evaporator 14 recovers the heat in the regeneration exhaust air of the secondary rotor, and converts it into heat for the second regenerative heat pump condenser 10 through compression by the second regenerative heat pump compressor 101. The second regenerative heat pump condenser 10 dissipates heat and heats the regeneration air on the regeneration flow path. The heated regeneration air then enters the second regeneration heater 11 for further heating until the temperature meets the preset regeneration temperature requirement. The energy efficiency ratio of the second regenerative heat pump module can reach 3.75, that is, 1 part of work is input and 3.75 times of heat is released, which has higher energy efficiency than directly using electric heating or steam heating.

[0052] In one embodiment, if Figure 1 As shown, the first regenerative heat pump module includes: a first regenerative heat pump compressor 151, a first regenerative heat pump evaporator 19, a first regenerative heat pump condenser 15 and a first regenerative heat pump throttling device 152; wherein, the first regenerative heat pump evaporator 19 is arranged on the air supply path of the first regenerative fan 18; the first regenerative heat pump condenser 15 is arranged between the regenerative air supply inlet B and the first regenerative heater 16; the first regenerative heat pump compressor 151 is respectively connected to the first regenerative heat pump evaporator 19 and the first regenerative heat pump condenser 15; the first regenerative heat pump throttling device 152 is respectively connected to the first regenerative heat pump evaporator 19 and the first regenerative heat pump condenser 15. The first regenerative heat pump module is arranged on the regeneration flow path and is located on the air outlet path of the second regenerative heat pump module.

[0053] It should be understood that if the regeneration exhaust air temperature of the secondary rotor is too high, it is not conducive to the operation of the subsequent first regeneration heat pump module. In this embodiment, after adding the second regeneration heat pump module to the dehumidification system, the second regeneration heat pump evaporator 14 therein absorbs the heat of the regeneration exhaust air of the secondary rotor, thereby reducing the temperature of the regeneration air entering the primary rotor, and at the same time, it is also beneficial for the first regeneration heat pump condenser 15 to release heat.

[0054] The first regenerative heat pump evaporator 19 is located on the air supply path of the first regenerative fan 18, and can absorb the heat in the regenerative exhaust air originally discharged to the atmosphere by the first-stage rotor. After the first regenerative heat pump evaporator 19 absorbs the heat of the regenerative exhaust air of the first-stage rotor, it is converted into heat of the first regenerative heat pump condenser 15 through the first regenerative heat pump compressor 151. This heat can be used to preheat the regenerative air of the first-stage rotor, reduce the heating heat of the first regenerative heater 16, and thus achieve energy saving.

[0055] In one embodiment, if Figure 1 As shown, the processing flow path sensor module includes:

[0056] A first humidity sensor H1 and a first temperature sensor T1 are provided between the fresh air inlet end and the primary filter 1 on the treated air path; the first humidity sensor H1 is used to monitor the fresh air humidity, and the first temperature sensor T1 is used to monitor the fresh air humidity.

[0057] A second temperature sensor T2 is provided between the front cooler 2 and the direct expansion evaporator 3; the second temperature sensor T2 is used to monitor the outlet air temperature of the front cooler 2. The second regulating water valve on the front cooler 2 is controlled to adjust the chilled water flow of the front cooler 2, thereby realizing the control of the fresh air temperature.

[0058] A second humidity sensor H2 and a third temperature sensor T3 are provided between the direct expansion evaporator 3 and the processing zone 4 of the first-stage rotor; the second humidity sensor H2 is used to monitor the outlet humidity of the direct expansion evaporator 3 , and the third temperature sensor T3 is used to monitor the outlet temperature of the direct expansion evaporator 3 .

[0059] A first dew point sensor D1 and a fourth temperature sensor T4 are arranged between the processing zone 4 of the first-stage rotor and the air supply fan 5; the first dew point sensor D1 is used to monitor the outlet dew point temperature of the processing zone 4 of the first-stage rotor, and the fourth temperature sensor T4 is used to monitor the outlet temperature of the processing zone 4 of the first-stage rotor.

[0060] A fifth temperature sensor T5 is provided between the intermediate cooler 6 and the outlet A; the fifth temperature sensor T5 is installed on the air outlet path of the intermediate cooler 6 to monitor the air outlet temperature of the intermediate cooler 6. A third regulating water valve 61 is installed on the intermediate cooler 6. The third regulating water valve 61 is used to adjust the chilled water flow of the intermediate cooler 6.

[0061] The second dew point sensor D2 and the sixth temperature sensor T6 are arranged on the air outlet path of the medium efficiency filter 9. The second dew point sensor D2 and the sixth temperature sensor T6 are arranged between the medium efficiency filter 9 and the drying room. The second dew point sensor D2 is used to monitor the outlet dew point temperature of the processing area 7 of the secondary rotor, and the sixth temperature sensor T6 is used to monitor the supply air temperature.

[0062] In one embodiment, if Figure 1 As shown, the regeneration flow path sensor module includes:

[0063] A third dew point sensor D3 and a seventh temperature sensor T7 are arranged between the preheating and dehumidification zone 21 of the secondary wheel and the second regenerative heat pump condenser 10; a third dew point sensor D3 and a seventh temperature sensor T7 are arranged at the inlet of the second regenerative heat pump condenser 10, the third dew point sensor D3 is used to monitor the dew point temperature of the regeneration air entering the second regenerative heat pump condenser 10, and the seventh temperature sensor T7 is used to monitor the temperature of the regeneration air entering the second regenerative heat pump condenser 10.

[0064] An eighth temperature sensor T8 is provided between the second regenerative heat pump condenser 10 and the second regenerative heater 11 ; an eighth temperature sensor T8 is provided at the outlet of the second regenerative heat pump condenser 10 for monitoring the outlet air temperature of the second regenerative heat pump condenser 10 .

[0065] A ninth temperature sensor T9 is arranged between the second regeneration heater 11 and the regeneration zone 12 of the secondary rotor; the ninth temperature sensor T9 is installed on the air outlet path of the second regeneration heater 11, and the ninth temperature sensor T9 is equipped with a power regulator to monitor the regeneration air temperature entering the regeneration zone 12 of the secondary rotor, and adjust the power of the second regeneration heater 11 as required.

[0066] A fourth dew point sensor D4 and a tenth temperature sensor T10 are arranged between the second regeneration fan 13 and the second regeneration heat pump evaporator 14; a fourth dew point sensor D4 and a tenth temperature sensor T10 are installed at the inlet of the second regeneration heat pump evaporator 14, the fourth dew point sensor D4 is used to monitor the regeneration exhaust air dew point temperature of the regeneration zone 12 of the secondary wheel, and the tenth temperature sensor T10 is used to monitor the regeneration exhaust air temperature of the regeneration zone 12 of the secondary wheel.

[0067] A third humidity sensor H3 and an eleventh temperature sensor T11 are provided at the regeneration air inlet B; the third humidity sensor H3 is used to monitor the humidity of the regeneration fresh air supplied, and the eleventh temperature sensor T11 is used to monitor the temperature of the regeneration fresh air supplied.

[0068] A fourth humidity sensor H4 and a twelfth temperature sensor T12 are arranged between the regeneration air filter 20 and the first regeneration heat pump condenser 15; a fourth humidity sensor H4 and a twelfth temperature sensor T12 are installed at the entrance of the first regeneration heat pump condenser 15, the fourth humidity sensor H4 is used to monitor the humidity of the first regeneration air mixed with the regeneration exhaust air of the second regeneration fan 13, and the twelfth temperature sensor T12 is used to monitor the temperature of the first regeneration air entering the first regeneration heat pump condenser 15.

[0069] It should be noted that, based on the humidity of the supplementary regeneration fresh air monitored in real time by the third humidity sensor H3 and the regeneration exhaust air dew point temperature of the regeneration zone 12 of the secondary wheel monitored in real time by the fourth dew point sensor D4, the absolute humidity can be calculated, and then it can be determined whether the first-level regeneration air mixed with the supplementary regeneration fresh air and the regeneration exhaust air of the second regeneration fan 13 meets the preset first-level regeneration air volume requirement. If not, the air volume supplemented at the regeneration air inlet B is controlled and adjusted so that the air volume of the first-level regeneration air finally obtained meets the preset first-level regeneration air volume requirement.

[0070] A thirteenth temperature sensor T13 is provided between the first regenerative heat pump condenser 15 and the first regenerative heater 16 ; the thirteenth temperature sensor T13 is installed at the outlet of the first regenerative heat pump condenser 15 to monitor the outlet air temperature of the first regenerative heat pump condenser 15 .

[0071] A fourteenth temperature sensor T14 is provided between the first regeneration heater 16 and the regeneration zone 17 of the first-stage rotor; the fourteenth temperature sensor T14 is used to monitor the temperature of the regeneration air entering the regeneration zone 17 of the first-stage rotor.

[0072] A fifth humidity sensor H5 and a fifteenth temperature sensor T15 are arranged between the first regeneration fan 18 and the first regeneration heat pump evaporator 19; a fifth humidity sensor H5 and a fifteenth temperature sensor T15 are arranged at the inlet of the first regeneration heat pump evaporator 19, the fifth humidity sensor H5 is used to monitor the regeneration exhaust air dew point temperature of the regeneration zone 17 of the first-stage wheel, and the fifteenth temperature sensor T15 is used to monitor the regeneration exhaust air temperature of the regeneration zone 17 of the first-stage wheel.

[0073] The sixth humidity sensor H6 and the sixteenth temperature sensor T16 are arranged on the air outlet path of the first regenerative heat pump evaporator 19. The sixth humidity sensor H6 and the sixteenth temperature sensor T16 are arranged at the outlet of the first regenerative heat pump evaporator 19, the sixth humidity sensor H6 is used to monitor the air outlet humidity of the first regenerative heat pump evaporator 19, and the sixteenth temperature sensor T16 is used to monitor the air outlet temperature of the first regenerative heat pump evaporator 19.

[0074] In one embodiment, in combination Figure 1 It is explained that the operation status of the front surface cooler 2 and the direct expansion cryogenic module is controlled so that the fresh air temperature entering the treatment zone 4 of the first-stage rotor meets the preset fresh air temperature requirement. For example, the preset fresh air temperature requirement is that the fresh air temperature entering the treatment zone 4 of the first-stage rotor is less than 5°C, specifically including the following situations:

[0075] Case 1: If the fresh air temperature at the fresh air inlet end collected in real time by the first temperature sensor T1 is less than the first preset fresh air temperature value, the front surface cooler 2 and the direct expansion cryogenic module are controlled to stop working, and the fresh air temperature meets the preset fresh air temperature requirement.

[0076] When the fresh air temperature collected in real time by the first temperature sensor T1 is lower than the first preset fresh air temperature value (fresh air temperature <5°C), the second regulating water valve 35 of the front surface cooler 2 is closed, and the direct expansion cryogenic module is turned off, so that the fresh air directly enters the processing area 4 of the first-stage rotor for dehumidification.

[0077] Scenario 2: If the fresh air temperature at the fresh air inlet end collected in real time by the first temperature sensor T1 is greater than or equal to the first preset fresh air temperature value and less than or equal to the second preset fresh air temperature value, the front surface cooler 2 is controlled to stop working, and the fresh air enters the direct expansion cryogenic module for cooling to reduce the fresh air temperature to the first preset fresh air temperature value, so that the fresh air temperature meets the preset fresh air temperature requirement;

[0078] When the fresh air temperature collected in real time by the first temperature sensor T1 is greater than or equal to 5°C (the first preset fresh air temperature value) and less than or equal to 12°C (the second preset fresh air temperature value), the second regulating water valve 35 of the front surface cooler 2 is closed, and the front surface cooler 2 stops working, allowing the fresh air to directly enter the direct expansion evaporator 3 of the direct expansion cryogenic module and cool to 5°C.

[0079] Scenario 3: If the fresh air temperature at the fresh air inlet end collected in real time by the first temperature sensor T1 is greater than the second preset fresh air temperature value, the front surface cooler 2 and the direct expansion cryogenic module are controlled to work, and the fresh air is cooled in turn to cool the fresh air and reduce the fresh air temperature to the first preset fresh air temperature value, and the fresh air temperature meets the preset fresh air temperature requirement.

[0080] When the fresh air temperature collected in real time by the first temperature sensor T1 is higher than 12°C, the second regulating water valve 35 of the front cooler 2 is opened to reduce the fresh air temperature passing through the front cooler 2 to 12°C. When the second temperature sensor T2 on the air outlet path of the front cooler 2 detects that the air outlet temperature of the front cooler 2 is higher than 12°C, the control module controls the opening of the second regulating water valve 35 of the front cooler 2, thereby controlling and adjusting the chilled water flow of the front cooler 2, so as to achieve the purpose of controlling the air outlet temperature of the front cooler 2 to be reduced to 12°C.

[0081] When the outlet air temperature of the current cooler 2 drops to 12°C, it enters the direct expansion evaporator 3 of the direct expansion cryogenic module to be cooled to 5°C. The third temperature sensor T3 on the outlet air path of the direct expansion evaporator 3 monitors the outlet air temperature of the direct expansion evaporator 3 in real time. If the monitored outlet air temperature is greater than 5°C, the control module controls the operation state of the direct expansion cryogenic module to maintain the outlet air temperature of the direct expansion evaporator 3 at 5°C.

[0082] It should be noted that by controlling the operating status of the front surface cooler 2 and the direct expansion cryogenic module, the air temperature and humidity of the treatment area 4 entering the first-stage rotor can meet the preset fresh air temperature requirements, that is, maintain at a relatively stable design value. Thereby, the subsequent operation of the entire dehumidification system in the treatment flow path is maintained in a relatively stable state and operates within the optimal design operating range. While the front surface cooler 2 and the direct expansion cryogenic module cool the fresh air, they also simultaneously reduce the humidity in the fresh air, bear part of the wet load, reduce the wet load borne by the first-stage rotor, thereby reducing the heat required for regeneration, lowering the regeneration air temperature, and playing a role in saving energy.

[0083] In one embodiment, the operating power of the first regeneration heater 16 and the second regeneration heater 11 is adjusted so that the outlet dew point temperature of the treatment zone 4 of the primary rotor and the treatment zone 7 of the secondary rotor meets the preset dew point temperature requirement, specifically including:

[0084] If the outlet dew point temperature of the treatment zone 4 of the first-stage rotor collected in real time by the first dew point sensor D1 does not meet the preset dew point temperature requirement, the operating power of the first regeneration heater 16 is controlled to change the regeneration temperature of the regeneration zone 17 of the first-stage rotor, thereby driving the outlet dew point temperature of the treatment zone 4 of the first-stage rotor to change until it meets the preset dew point temperature requirement;

[0085] If the outlet dew point temperature of the processing zone 7 of the secondary wheel collected in real time by the second dew point sensor D2 does not meet the preset dew point temperature requirement, the operating power of the second regeneration heater 11 is controlled to adjust the regeneration temperature of the regeneration zone 12 of the secondary wheel, thereby driving the outlet dew point temperature of the processing zone 7 of the secondary wheel to change until it meets the preset dew point temperature requirement.

[0086] It should be noted that when the fresh air temperature meets the preset fresh air temperature requirement, after entering the processing area 4 of the first-stage rotor, the fresh air is adsorbed and dehumidified by the rotor, so that the outlet dew point temperature of the processing area 4 of the first-stage rotor meets the preset dew point temperature requirement. At the same time, a first dew point sensor D1 is installed on the outlet path of the processing area 4 of the first-stage rotor. If the outlet dew point temperature monitored in real time by the first dew point sensor D1 does not meet the preset dew point temperature requirement, the control module controls and adjusts the operating power of the first regeneration heater 16 according to the monitoring result. With the adjustment of the operating power of the first regeneration heater 16, the regeneration temperature of the regeneration area 17 of the first-stage rotor changes, thereby driving the outlet dew point temperature of the processing area 4 of the first-stage rotor to change, until the outlet dew point temperature meets the preset dew point temperature requirement, the adjustment is stopped, and the operation is kept in a stable state.

[0087] After the outlet dew point temperature of the treatment area 4 of the first-stage rotor meets the preset dew point temperature requirement, the outlet temperature of the treatment area 4 of the first-stage rotor is not conducive to the adsorption dehumidification of the treatment area of ​​the second-stage rotor, that is, it is difficult to reach the air supply dew point temperature required in the drying room. Therefore, it is necessary to lower the outlet temperature of the treatment area 4 of the first-stage rotor. An intermediate cooler 6 is arranged on the outlet path of the treatment area 4 of the first-stage rotor. The air of the treatment area 4 of the first-stage rotor is transported to the intermediate cooler 6 by the air supply fan 5. The intermediate cooler 6 further cools the air coming out of the treatment area 4 of the first-stage rotor. The fifth temperature sensor T5 monitors the outlet temperature of the intermediate cooler 6 after cooling in real time. If the outlet temperature does not meet the preset outlet temperature requirement, the opening of the third regulating water valve 61 of the intermediate cooler 6 is controlled, so as to control the outlet temperature by adjusting the chilled water flow of the intermediate cooler 6, so that the outlet temperature of the intermediate cooler 6 meets the preset outlet temperature requirement.

[0088] Furthermore, when the outlet air temperature of the intermediate surface cooler 6 meets the preset outlet air temperature requirement, it is beneficial to the adsorption and dehumidification of the processing area of ​​the secondary wheel. At this time, it is divided into two parts through the outlet A, one part of which enters the processing area 7 of the secondary wheel on the processing flow path for adsorption and dehumidification. The air after adsorption and dehumidification in the processing area 7 of the secondary wheel enters the post-heater 8 for heating, and then is sent to the drying room after being filtered by the medium efficiency filter 9.

[0089] A second dew point sensor D2 and a sixth temperature sensor T6 are installed on the air outlet path of the medium efficiency filter 9. It should be noted that the second dew point sensor D2 monitors the outlet dew point temperature of the processing area 7 of the secondary wheel in real time, while the sixth temperature sensor T6 monitors the supply air temperature of the air heated by the post-heater 8 in real time.

[0090] The second dew point sensor D2 monitors the outlet dew point temperature of the processing zone 7 of the secondary rotor in real time. If the outlet dew point temperature does not meet the preset dew point temperature requirement, the control module sends a control signal to control and adjust the operating power of the second regeneration heater 11, thereby changing the regeneration temperature of the regeneration zone 12 of the secondary rotor. The change in the regeneration temperature drives the outlet dew point temperature of the processing zone 7 of the secondary rotor to change until the preset outlet dew point temperature is reached to ensure the stability of the dew point temperature of the air entering the drying room. The sixth temperature sensor T6 is used to monitor the air supply temperature entering the drying room. If the air supply temperature does not meet the preset air supply temperature requirement, the control module sends a control signal to adjust the operating power of the rear heater 8, so that the air supply temperature remains at a stable design value.

[0091] The other part of the wind divided by the outlet A enters the preheating and dehumidifying zone 21 of the secondary rotor and is adsorbed and dehumidified. At this time, the temperature rises and the humidity drops. The air after the humidity drops enters the regeneration zone 12 of the secondary rotor, which is conducive to making the outlet air temperature of the processing zone 7 of the secondary rotor reach the preset dew point temperature requirement. The third dew point sensor D3 and the seventh temperature sensor T7 are set on the outlet air path of the preheating and dehumidifying zone 21 of the secondary rotor, that is, at the entrance of the second regenerative heat pump condenser 10. If the regeneration air temperature monitored in real time by the seventh temperature sensor T7 does not meet the design requirements, the second regenerative heat pump module is controlled to be turned on, and the second regenerative heat pump condenser 10 heats the incoming air until the outlet air temperature monitored by the eighth temperature sensor T8 meets the design requirements, and the control of the second regenerative heat pump module is stopped.

[0092] In order to facilitate the demonstration of the low dew point dual-rotor dehumidification system combining direct expansion cryogenic pre-dehumidification and heat pump regeneration in this embodiment, the following specific embodiments are provided for illustration.

[0093] When in the low temperature and low humidity mode in winter, the fresh air temperature meets the preset fresh air temperature requirements, the front surface cooler and the direct expansion cryogenic module stop working, and the air supply dew point temperature of the entire rotary dehumidification system does not meet the preset dew point temperature requirements. If the air supply dew point temperature is changed by lowering the regeneration temperature of the first and second rotary wheels, the operation of the rotary wheel will be affected.

[0094] In this embodiment, the operating power of the first regenerative heater and the second regenerative heater is controlled and adjusted by the control module to achieve temperature adjustment until the lowest temperature value at which the primary rotor and the secondary rotor can maintain normal operation. If the lowest temperature value cannot be reached until the first regenerative heater and the second regenerative heater are controlled to shut down, the operation of the first regenerative heat pump module and the second regenerative heat pump module is controlled to achieve the goal of adjusting the temperature until the lowest temperature value at which the primary rotor and the secondary rotor can maintain normal operation.

[0095] When in maintenance mode, if the direct expansion cryogenic module stops working due to maintenance, the operating power of the first regeneration heater is controlled to increase until the outlet dew point temperature of the treatment area of ​​the first-stage wheel meets the preset dew point temperature requirement.

[0096] Alternatively, if the first regenerative heat pump module stops working due to maintenance, the operating power of the first regenerative heater is controlled to increase until the outlet air dew point temperature of the treatment zone of the first-stage rotor meets the preset dew point temperature requirement.

[0097] Alternatively, if the second regenerative heat pump module stops working due to maintenance, the second regenerative heat pump module is turned off and the operating power of the second regenerative heater is increased until the outlet dew point temperature of the processing area of ​​the secondary wheel meets the preset dew point temperature requirement.

[0098] It should be noted that the present invention realizes precise control of each device in the rotary dehumidification system according to the data collected in real time by the sensor module, thereby ensuring the stability of the dew point temperature of the supply air. The present invention effectively reduces the dehumidification burden of the rotary wheel and reduces the regeneration temperature by adopting direct expansion cryogenic technology, thereby significantly reducing the energy consumption in the regeneration process. The present invention installs a regenerative heat pump condenser at the inlet of the rotary wheel, which can bear part of the regeneration heat and further reduce the regeneration energy consumption. The present invention also installs a regenerative heat pump evaporator at the exhaust outlet of the rotary wheel, which can recycle and utilize the heat in the regenerated exhaust air, thereby achieving the purpose of saving energy. The rotary dehumidification system of the present invention achieves dual optimization of dehumidification performance and energy consumption performance, significantly improves dehumidification efficiency and reduces system energy consumption.

[0099] Figure 2 Schematic diagram of a control method for a low dew point dual-rotor dehumidification system combining direct expansion cryogenic pre-dehumidification and heat pump regeneration provided in an embodiment of the present application. Figure 2 As shown, the control method includes:

[0100] Step S21: acquiring temperature and humidity data and dew point temperature data collected in real time by the processing flow path sensor module and the regeneration flow path sensor module;

[0101] Step S22: Based on the temperature and humidity data and dew point temperature data collected in real time by the processing flow path sensor module and the regeneration flow path sensor module, the operating status of the front surface cooler and the direct expansion cryogenic module are controlled so that the fresh air entering the processing area of ​​the first-stage wheel meets the preset fresh air temperature requirement; the opening of the regulating water valve of the middle surface cooler is controlled so that the air outlet temperature of the middle surface cooler meets the preset air outlet temperature requirement; the operating power of the first regeneration heater and the second regeneration heater are adjusted so that the air outlet temperature of the processing area of ​​the first-stage wheel and the processing area of ​​the second-stage wheel meet the preset dew point temperature requirement.

[0102] It should be understood that the specific process of the above corresponding steps has been described in detail in the above system embodiment, and for the sake of brevity, it will not be repeated here.

[0103] It should also be understood that the division of modules in the embodiments of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation. In addition, each functional module in each embodiment of the present application may be integrated into a processor, or may exist physically separately, or two or more modules may be integrated into one module. The above-mentioned integrated modules may be implemented in the form of hardware or in the form of software functional modules.

[0104] Figure 3 is a schematic block diagram of an electronic terminal provided in an embodiment of the present application. Figure 3 As shown, the electronic terminal includes: at least one processor 301, a memory 302, at least one network interface 303 and a user interface 305. The various components in the device are coupled together through a bus system 304. It can be understood that the bus system 304 is used to realize the connection and communication between these components. In addition to the data bus, the bus system 304 also includes a power bus, a control bus and a status signal bus. However, for the sake of clarity, Figure 3 In the specification, various buses are labeled as bus systems.

[0105] The user interface 305 may include a display, a keyboard, a mouse, a trackball, a click gun, keys, buttons, a touch pad or a touch screen.

[0106] It is understood that the memory 302 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) or 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) and 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.

[0107] The memory 302 in the embodiment of the present invention is used to store various categories of data to support the operation of the electronic terminal 300. Examples of these data include: any executable program for operating on the electronic terminal 300, such as an operating system 3021 and an application 3022; the operating system 3021 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 3022 may include various applications, such as a media player (Media Player), a browser (Browser), etc., for implementing various application services. The low dew point dual-rotor dehumidification method for implementing the deep cooling direct expansion pre-dehumidification and heat pump regeneration combination provided in the embodiment of the present invention may be included in the application 3022.

[0108] The method disclosed in the above embodiment of the present invention can be applied to the processor 301, or implemented by the processor 301. The processor 301 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 301 or the instruction in the form of software. The above processor 301 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 301 can implement or execute the methods, steps and logic block diagrams disclosed in the embodiment of the present invention. The general processor 301 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.

[0109] In an exemplary embodiment, the electronic terminal 300 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.

[0110] 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).

[0111] 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.

[0112] 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.

[0113] 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.

[0114] 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.

[0115] 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.

[0116] 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)).

[0117] 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.

[0118] 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.

[0119] In summary, the present application provides a low dew point dual-rotor dehumidification system, control method and terminal combining direct expansion cryogenic pre-dehumidification and heat pump regeneration. The present application provides a low dew point dual-rotor dehumidification system, control method and terminal combining direct expansion cryogenic pre-dehumidification and heat pump regeneration. The present invention realizes precise control of each device in the rotary dehumidification system according to the data collected in real time by the sensor module, thereby ensuring the stability of the dew point temperature of the supply air. The present invention effectively reduces the dehumidification burden of the rotary wheel and reduces the regeneration temperature by adopting direct expansion cryogenic technology, thereby significantly reducing the energy consumption during the regeneration process. The present invention installs a regenerative heat pump condenser at the inlet of the rotary wheel, which can bear part of the regeneration heat and further reduce the regeneration energy consumption. The present invention also installs a regenerative heat pump evaporator at the exhaust outlet of the rotary wheel, which can recycle and utilize the heat in the regeneration exhaust air, thereby achieving the purpose of energy saving. The rotary dehumidification system of the present invention realizes the dual optimization of dehumidification performance and energy consumption performance, significantly improves the dehumidification efficiency and reduces the system energy consumption. Therefore, the present application effectively overcomes the various shortcomings of the prior art and has a high industrial utilization value.

[0120] 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 low dew point double-rotor dehumidification system combining direct expansion cryogenic pre-dehumidification and heat pump regeneration, characterized in that: The system comprises: a treatment flow path, a regeneration flow path, a direct expansion cryogenic module, a first regeneration heat pump module, a second regeneration heat pump module and a control module; an outlet is arranged on the treatment flow path to lead out the regeneration flow path through the outlet; the direct expansion cryogenic module is arranged on the treatment flow path; the first regeneration heat pump module and the second regeneration heat pump module are arranged on the regeneration flow path; Wherein, the processing flow path includes: a primary filter, a front surface cooler, a processing area of ​​a first-stage rotor, a blower, a middle surface cooler, a processing area of ​​a second-stage rotor, a post-heater and a middle-efficiency filter are sequentially arranged along the wind direction, thereby forming a processing air path; the direct expansion cryogenic module is arranged between the front surface cooler and the processing area of ​​the first-stage rotor; the front surface cooler is connected to the direct expansion cryogenic module; a third regulating water valve is arranged on the middle surface cooler; a processing flow path sensor module is arranged on the processing flow path, which is used to collect temperature and humidity data and dew point temperature data on the processing flow path in real time; The regeneration flow path includes: a preheating and dehumidification zone of a secondary rotor, a second regeneration heater, a regeneration zone of a secondary rotor, a second regeneration fan, a first regeneration heater, a regeneration zone of a primary rotor and a first regeneration fan are sequentially arranged along the wind direction, thereby forming a regeneration wind path; the regeneration flow path is connected to the first regeneration heat pump module and the second regeneration heat pump module respectively; a regeneration air inlet is arranged between the second regeneration fan and the first regeneration heater; a regeneration air filter is arranged on the regeneration air inlet; a regeneration flow path sensor module is arranged on the regeneration flow path for real-time acquisition of temperature and humidity data and dew point temperature data on the regeneration flow path; The control module is communicatively connected with the processing flow path sensor module and the regeneration flow path sensor module respectively, and is used to control the operating status of the front surface cooler and the direct expansion cryogenic module according to the temperature and humidity data and dew point temperature data collected in real time by the processing flow path sensor module and the regeneration flow path sensor module, so that the fresh air temperature entering the processing area of ​​the first-stage rotor meets the preset fresh air temperature requirement; control the opening of the third regulating water valve of the middle surface cooler so that the air outlet temperature of the middle surface cooler meets the preset air outlet temperature requirement; adjust the operating power of the first regeneration heater and the second regeneration heater so that the air outlet dew point temperature of the processing area of ​​the first-stage rotor and the processing area of ​​the second-stage rotor meets the preset dew point temperature requirement.

2. The low dew point double-rotor dehumidification system combining direct expansion cryogenic pre-dehumidification and heat pump regeneration according to claim 1 is characterized in that: The direct expansion cryogenic module comprises: a direct expansion compressor, a direct expansion evaporator, a direct expansion condenser and a direct expansion throttling device; Wherein, the direct expansion evaporator is arranged on the processing air path between the front surface cooler and the processing area of ​​the first-stage rotor; the direct expansion evaporator is connected to the direct expansion compressor and the direct expansion throttling device respectively; the direct expansion condenser is connected to the direct expansion compressor and the direct expansion throttling device respectively; the direct expansion condenser is also connected to the front surface cooler; a first regulating water valve is arranged between the direct expansion condenser and the front surface cooler; and a second regulating water valve is arranged on the front surface cooler.

3. The low dew point double-rotor dehumidification system combining direct expansion cryogenic pre-dehumidification and heat pump regeneration according to claim 2 is characterized in that: The second regenerative heat pump module includes: a second regenerative heat pump compressor, a second regenerative heat pump evaporator, a second regenerative heat pump condenser and a second regenerative heat pump throttling device; Among them, the second regenerative heat pump evaporator is arranged between the second regenerative fan and the regenerative air inlet; the second regenerative heat pump condenser is arranged between the preheating and dehumidification area of ​​the secondary wheel and the second regenerative heater; the second regenerative heat pump compressor is respectively connected to the second regenerative heat pump evaporator and the second regenerative heat pump condenser; the second regenerative heat pump throttling device is respectively connected to the second regenerative heat pump evaporator and the second regenerative heat pump condenser.

4. The low dew point double-rotor dehumidification system combining direct expansion cryogenic pre-dehumidification and heat pump regeneration according to claim 3 is characterized in that: The first regenerative heat pump module includes: a first regenerative heat pump compressor, a first regenerative heat pump evaporator, a first regenerative heat pump condenser and a first regenerative heat pump throttling device; Among them, the first regenerative heat pump evaporator is arranged on the air supply path of the first regenerative fan; the first regenerative heat pump condenser is arranged between the regenerative air supply inlet and the first regenerative heater; the first regenerative heat pump compressor is respectively connected to the first regenerative heat pump evaporator and the first regenerative heat pump condenser; the first regenerative heat pump throttling device is respectively connected to the first regenerative heat pump evaporator and the first regenerative heat pump condenser.

5. The low dew point double-rotor dehumidification system combining direct expansion cryogenic pre-dehumidification and heat pump regeneration according to claim 4 is characterized in that: The processing flow path sensor module comprises: A first humidity sensor and a first temperature sensor are provided between the fresh air inlet end and the primary filter on the treated air path; A second temperature sensor is provided between the front surface cooler and the direct expansion evaporator; a second humidity sensor and a third temperature sensor disposed between the direct expansion evaporator and the processing zone of the primary runner; a first dew point sensor and a fourth temperature sensor disposed between the treatment area of ​​the primary rotor and the blower; A fifth temperature sensor disposed between the intermediate surface cooler and the outlet; A second dew point sensor and a sixth temperature sensor are arranged on the air outlet path of the medium efficiency filter.

6. The low dew point double-rotor dehumidification system combining direct expansion cryogenic pre-dehumidification and heat pump regeneration according to claim 5 is characterized in that: The regeneration flow path sensor module comprises: a third dew point sensor and a seventh temperature sensor disposed between the preheating and dehumidification zone of the secondary rotor and the second regenerative heat pump condenser; an eighth temperature sensor disposed between the second regenerative heat pump condenser and the second regenerative heater; a ninth temperature sensor disposed between the second regeneration heater and the regeneration zone of the secondary rotor; a fourth dew point sensor and a tenth temperature sensor disposed between the second regenerative fan and the second regenerative heat pump evaporator; a third humidity sensor and an eleventh temperature sensor disposed at the regeneration air inlet; a fourth humidity sensor and a twelfth temperature sensor disposed between the regenerative air supply filter and the first regenerative heat pump condenser; a thirteenth temperature sensor disposed between the first regenerative heat pump condenser and the first regenerative heater; a fourteenth temperature sensor disposed between the first regeneration heater and the regeneration zone of the primary rotor; a fifth humidity sensor and a fifteenth temperature sensor disposed between the first regenerative fan and the first regenerative heat pump evaporator; A sixth humidity sensor and a sixteenth temperature sensor are provided on an air outlet path of the first regenerative heat pump evaporator.

7. The low dew point double-rotor dehumidification system combining direct expansion cryogenic pre-dehumidification and heat pump regeneration according to claim 6 is characterized in that: The operating status of the front surface cooler and the direct expansion cryogenic module is controlled so that the fresh air temperature entering the treatment area of ​​the first-stage rotor meets the preset fresh air temperature requirements, including the following situations: Case 1: If the fresh air temperature at the fresh air inlet end collected in real time by the first temperature sensor is less than the first preset fresh air temperature value, the front surface cooler and the direct expansion cryogenic module are controlled to stop working, and the fresh air temperature meets the preset fresh air temperature requirement; Scenario 2: If the fresh air temperature at the fresh air inlet end collected in real time by the first temperature sensor is greater than or equal to the first preset fresh air temperature value and less than or equal to the second preset fresh air temperature value, the front surface cooler is controlled to stop working, and the fresh air enters the direct expansion cryogenic module for cooling to reduce the fresh air temperature to the first preset fresh air temperature value, so that the fresh air temperature meets the preset fresh air temperature requirement; Scenario 3: If the fresh air temperature at the fresh air inlet end collected in real time by the first temperature sensor is greater than the second preset fresh air temperature value, the front surface cooler and the direct expansion cryogenic module are controlled to operate, and the fresh air is cooled in turn to cool the fresh air and reduce the fresh air temperature to the first preset fresh air temperature value, and the fresh air temperature meets the preset fresh air temperature requirement.

8. The low dew point double-rotor dehumidification system combining direct expansion cryogenic pre-dehumidification and heat pump regeneration according to claim 6 is characterized in that: The operating power of the first regeneration heater and the second regeneration heater is adjusted so that the outlet dew point temperature of the treatment area of ​​the first-stage rotor and the treatment area of ​​the second-stage rotor meets the preset dew point temperature requirement, specifically including: If the outlet dew point temperature of the treatment zone of the first-stage rotor collected in real time by the first dew point sensor does not meet the preset dew point temperature requirement, the operating power of the first regeneration heater is controlled to change the regeneration temperature of the regeneration zone of the first-stage rotor, thereby driving the outlet dew point temperature of the treatment zone of the first-stage rotor to change until it meets the preset dew point temperature requirement; If the outlet dew point temperature of the processing zone of the secondary wheel collected in real time by the second dew point sensor does not meet the preset dew point temperature requirement, the operating power of the second regeneration heater is controlled to adjust the regeneration temperature of the regeneration zone of the secondary wheel to change, thereby driving the outlet dew point temperature of the processing zone of the secondary wheel to change until it meets the preset dew point temperature requirement.

9. A control method for a low dew point double-rotor dehumidification system combining direct expansion cryogenic pre-dehumidification and heat pump regeneration, characterized in that: The control method is applied to the low dew point double-rotor dehumidification system combining direct expansion cryogenic pre-dehumidification and heat pump regeneration as claimed in any one of claims 1 to 8, wherein: Acquiring temperature and humidity data and dew point temperature data collected in real time by the processing flow path sensor module and the regeneration flow path sensor module; According to the temperature and humidity data and dew point temperature data collected in real time by the processing flow path sensor module and the regeneration flow path sensor module, the operating status of the front surface cooler and the direct expansion cryogenic module is controlled so that the fresh air temperature entering the processing area of ​​the first-stage wheel meets the preset fresh air temperature requirement; the opening of the third regulating water valve of the middle surface cooler is controlled so that the air outlet temperature of the middle surface cooler meets the preset air outlet temperature requirement; the operating power of the first regeneration heater and the second regeneration heater is adjusted so that the air outlet dew point temperature of the processing area of ​​the first-stage wheel and the processing area of ​​the second-stage wheel meets the preset dew point temperature requirement.

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 control method of the low dew point dual-rotor dehumidification system combining direct expansion cryogenic pre-dehumidification and heat pump regeneration as described in claim 9.

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