Ultrasonic atomization liquid guide fiber coordinated regulation indirect evaporation falling film heat exchange system and method

Abstract

The invention discloses an ultrasonic atomization-liquid guide fiber coordinated regulation indirect evaporation falling film heat exchange system which comprises a box body, a primary air inlet unit and a secondary air inlet unit, a reservoir is arranged in the box body, an ultrasonic nebulizer is placed in the reservoir, a round pipe is arranged above the reservoir, the round pipe is arranged between a primary air inlet and a product air outlet, and the secondary air inlet unit is arranged above the product air outlet. According to the evaporation falling film heat exchanger, the problem that a liquid film of an existing evaporation falling film heat exchanger is prone to breakage is solved. The invention further discloses an ultrasonic atomization-liquid guide fiber coordinated regulation and control indirect evaporation falling film heat exchange system, air heat exchange is achieved through the ultrasonic atomization-liquid guide fiber coordinated regulation and control indirect evaporation falling film heat exchange system, and air reaches the expected set temperature and humidity; the situation of liquid film instability and rupture during heat exchange is avoided, and meanwhile the system performs multi-party quick response and accurately regulates and controls the air temperature and humidity.

Description

Technical Field

[0001] The present invention belongs to the technical field of falling film heat exchangers, and relates to an ultrasonic atomization - liquid guiding fiber collaborative regulation indirect evaporation falling film heat exchange system, and also relates to an ultrasonic atomization - liquid guiding fiber collaborative regulation indirect evaporation falling film heat exchange method. Background Art

[0002] In the development of modern technology, the falling film evaporation heat transfer technology, as an important branch in the field of phase change heat transfer, its development process is closely related to the demand for efficient thermal management. The core mechanism of this technology is based on the thin layer flow of the liquid film formed along the vertical / inclined surface under the drive of gravity, and the energy exchange is realized through the coupled transfer of sensible heat and latent heat at the gas - liquid interface. Traditional falling film systems generally adopt smooth tubes or micro - fin tubes. However, limited by problems such as uneven liquid film distribution and insufficient suppression of interfacial turbulence, the actual heat transfer efficiency is quite different from the theoretical value.

[0003] With the in - depth study of fluid mechanics, scholars have found that the liquid film instability caused by dynamic wetting hysteresis is the key factor restricting performance. When the system is disturbed by an external field, the mismatch between the substrate surface heterogeneity and the liquid relaxation characteristics leads to the hindered movement of the three - phase contact line, forming a local capillary pressure gradient, which ultimately induces the liquid film to break. In response to this, the academic community has proposed a multi - scale surface modification strategy: the micro - nano structured surface improves the liquid film uniformity through capillary pumping.

[0004] In modern life, the temperature and humidity control achieved by the falling film evaporation heat transfer technology is crucial for clothing storage, food preservation, and health management. Traditional methods such as natural drying or simple dehumidifiers are easily affected by the weather and have unstable effects; while the falling film evaporation heat exchanger realizes efficient refrigeration or heating through the heat exchange between the liquid film and air, and the liquid film has a large contact area with air, high heat exchange efficiency, and can significantly reduce energy consumption.

[0005] The evaporative falling film heat exchanger is a highly efficient heat exchange device that conducts heat exchange between a liquid forming a thin film on a vertical surface and a gas or another fluid. Its main components include: a liquid distributor (to evenly distribute the liquid), a heat exchange surface (to form the liquid film), a gas channel (to contact the liquid film for heat exchange), and a housing (for support and sealing). It has the advantages of high efficiency, energy conservation, and compact structure, and is widely used in fields such as air conditioners and water heaters. Traditional falling film heat exchangers mostly adopt an independent module design, suffering from problems such as slow response, insufficient control accuracy, unstable liquid film formation, and easy rupture. Liquid film instability and rupture are common and crucial problems in falling film heat exchangers. The root cause of liquid film rupture is the formation of non-equilibrium wetting hysteresis effects in the liquid film, which is an imbalance in the interfacial energy transfer and dissipation during the dynamic wetting process. When an external field (such as a shear flow, temperature gradient, or mechanical vibration) drives the contact line to move, the difference between surface roughness or chemical heterogeneity and the relaxation rate of liquid molecules leads to contact angle hysteresis: local potential barriers on the solid surface hinder the slip of the contact line, causing interfacial stress accumulation and energy dissipation, and preventing the system from reaching a thermodynamic equilibrium state. This non-equilibrium characteristic reconstructs the internal stress distribution of the liquid film through the capillary pressure gradient, promoting the generation and expansion of local cavitation nuclei during the drainage process of the nano-scale liquid film, and ultimately triggering liquid film instability and rupture. In addition to the common problem of easy liquid film rupture in falling film heat exchangers, there is still much room for improvement in the heat and moisture exchange efficiency, multi-parameter collaborative control, and intelligent management of existing systems. Summary of the Invention

[0006] The object of the present invention is to provide an ultrasonic atomization - liquid guiding fiber collaborative regulation indirect evaporative falling film heat exchange system, which solves the problem of easy liquid film rupture in existing evaporative falling film heat exchangers.

[0007] Another object of the present invention is to provide an ultrasonic atomization - liquid guiding fiber collaborative regulation indirect evaporative falling film heat exchange method, which avoids liquid film instability and rupture during heat exchange and improves the air temperature and humidity regulation accuracy at the same time.

[0008] The first technical solution adopted by the present invention is an ultrasonic atomization - liquid guiding fiber collaborative regulation indirect evaporative falling film heat exchange system, which includes a box body. The box body is provided with a primary air inlet, a secondary air inlet, a product air outlet, and a product air outlet. The primary air inlet is connected to a primary air inlet unit, and the secondary air inlet is connected to a secondary air inlet unit. A water reservoir is arranged inside the box body, and an ultrasonic atomizer is placed in the water reservoir. A circular tube is arranged above the water reservoir, and the circular tube is arranged between the primary air inlet and the product air outlet. The outer surface of the circular tube is attached with liquid guiding fibers, and the liquid guiding fibers are guided from the primary air inlet to the product air outlet.

[0009] The characteristics of the first technical solution of the present invention are further as follows: The primary air inlet unit includes a primary air passage. One end of the primary air passage is the primary air inlet, and the other end is connected to the primary air intake of the box body. Inside the primary air passage, a first variable-frequency fan, a first evaporator, and a first flowmeter are sequentially arranged from the primary air inlet towards the primary air intake. The first variable-frequency fan and the first flowmeter are respectively located at the inlet and outlet of the first evaporator.

[0010] The secondary air inlet unit includes a secondary air passage. One end of the secondary air passage is the secondary air inlet, and the other end is connected to the secondary air intake of the box body. Inside the secondary air passage, a second variable-frequency fan, a second evaporator, and a second flowmeter are sequentially arranged from the secondary air inlet towards the secondary air intake. The second variable-frequency fan and the second flowmeter are respectively located at the inlet and outlet of the second evaporator. A humidifier is provided at the secondary air inlet of the secondary air passage.

[0011] The first evaporator is connected to a first low-temperature constant-temperature water bath device through a first peristaltic pump. The second evaporator is connected to a second low-temperature constant-temperature water bath device through a second peristaltic pump. The water reservoir of the box body is connected to a third low-temperature constant-temperature water bath device through a variable-frequency circulation pump.

[0012] The liquid-conducting fiber is coolmax fiber.

[0013] A first temperature sensor is provided in the water reservoir; Sensor components are provided at the primary air intake, secondary air intake, working air outlet, and product air outlet of the box body, and the sensor components are located outside the box body. The sensor components include a second temperature sensor, a humidity sensor, and a pressure sensor.

[0014] Multiple round tubes are provided, and the multiple round tubes are evenly arranged horizontally above the water reservoir.

[0015] The product air outlet is provided on one side of the box body, and the product air outlet is also provided on the top of the box body.

[0016] The second technical solution adopted by the present invention is the ultrasonic atomization-liquid-conducting fiber collaborative regulation indirect evaporation and falling film heat transfer method. The ultrasonic atomization-liquid-conducting fiber collaborative regulation indirect evaporation and falling film heat transfer system of the present invention is used to achieve air heat exchange, so that the air reaches the expected set temperature and humidity.

[0017] The characteristics of the second technical solution of the present invention also lie in: Specifically: Air undergoes sensible and latent heat exchange through the primary air inlet unit, and the first evaporator is used to achieve cooling and humidification to obtain primary air. The primary air flows through the liquid-conducting fiber in the box body and leads to the product air outlet; According to the set air temperature and humidity, it is judged whether the primary air temperature and humidity meet the requirements. If the temperature and humidity all meet the expected settings, the air is directly discharged from the product outlet and the secondary air inlet unit is not turned on. When the temperature meets the requirements but the humidity does not meet the standards, that is, the air needs to be humidified, the air passes through the secondary air inlet unit to obtain pre-treated air. The pre-treated air enters the box, and then the liquid water in the water reservoir is atomized by the ultrasonic atomizer. The atomized water is mixed with the pre-treated air and flows through the liquid-conducting fiber to form a high-humidity airflow that meets the humidity requirements to obtain secondary air. The secondary air is discharged from the product outlet, and the air discharged from the product outlet reaches the expected set temperature and humidity.

[0018] The beneficial effects of the present invention are: The ultrasonic atomization-liquid-conducting fiber coordinated regulation indirect evaporation falling film heat exchange system of the present invention uses liquid falling film technology to perform heat exchange. On this basis, the humidifier and ultrasonic atomizer work together through structural-dynamic coupling regulation to effectively suppress non-equilibrium wetting hysteresis; and add the function of regulating temperature and humidity, improve the heat exchange efficiency, and make the system more environmentally friendly.

[0019] The ultrasonic atomization-liquid-conducting fiber coordinated regulation indirect evaporation falling film heat exchange method of the present invention realizes rapid system response by graded temperature control, dynamic adjustment of water circulation volume at different temperature levels, variable frequency fan control of air flow, and linkage with evaporator and humidifier. The core monitors temperature and humidity, pressure data, temperature field, flow meter, and liquid film thickness to achieve precise humidity and temperature control. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of the ultrasonic atomization-liquid-conducting fiber coordinated control indirect evaporation falling film heat exchange system of the present invention; Figure 2 is a cross-sectional view of the liquid-conducting fiber on the horizontal tube of the box in the ultrasonic atomization-liquid-conducting fiber coordinated regulation indirect evaporation falling film heat exchange system of the present invention, wherein Figure 2 (a) is a cross-sectional view of the liquid-conducting fiber in a normal dry state, and Figure 2 (b) is a cross-sectional view of the liquid-conducting fiber in a wet and hot state.

[0021] Figure 3 This is a schematic structural diagram of the box in the ultrasonic atomization-liquid-conducting fiber coordinated control indirect evaporation falling film heat exchange system of the present invention; Figure 4 This is a structural expansion diagram of the horizontal falling film heat exchanger in the box of the ultrasonic atomization-liquid-conducting fiber coordinated control indirect evaporation falling film heat exchange system of the present invention; Figure 5 This is a structural expansion diagram of the plate falling film heat exchanger in the box in the ultrasonic atomization-liquid-conducting fiber coordinated regulation indirect evaporation falling film heat exchange system of the present invention.

[0022] In the figure, 101. first variable frequency fan, 102. second variable frequency fan; 201. First evaporator, 202. Second evaporator; 301. First flowmeter, 302. Second flowmeter; 401. First peristaltic pump, 402. Second peristaltic pump, 403. Variable frequency circulation pump; 501. First low-temperature constant temperature water bath device, 502. Second low-temperature constant temperature water bath device, 503. Third low-temperature constant temperature water bath device, 504. Water storage tank; 602. Box body, 701. Liquid guiding fiber, 801. Ultrasonic atomizer; 901. Data acquisition instrument, 902. Computer, 903. Controller, 904. Humidifier. Specific implementation mode

[0023] The present invention will be described in detail below with reference to the accompanying drawings and specific implementation modes.

[0024] Example 1 This example provides an ultrasonic atomization - liquid guiding fiber collaborative regulation indirect evaporation and falling film heat exchange system, as Figure 1 shown, including a box body 602. A primary air inlet, a secondary air inlet, a product air outlet and a product air outlet are arranged on the box body 602. The primary air inlet is connected with a primary air inlet unit, the secondary air inlet is connected with a secondary air inlet unit. A water storage tank 504 is arranged in the box body 602. An ultrasonic atomizer 801 is placed in the water storage tank 504. A round tube is arranged above the water storage tank 504. The round tube is arranged between the primary air inlet and the product air outlet. A liquid guiding fiber 701 is attached to the outer surface of the round tube. The liquid guiding fiber 701 is guided from the primary air inlet to the product air outlet.

[0025] As shown in Figure 2, liquid-conducting fiber 701 is made of Coolmax fiber. As shown in Figure 2(a), its surface structure is a smooth cylindrical structure when dry and normal, with a relatively flat surface and no noticeable wrinkles or grooves. However, as shown in Figure 2(b), when exposed to a humid and hot environment, the fiber surface swells due to moisture absorption or temperature fluctuations, resulting in wrinkles that form a cross-shaped grooved cross section. This structure resembles four grooves intersecting in a "cross," dividing the circular cross section into four symmetrical raised areas, forming micron-scale liquid-conducting channels. The cross-shaped grooves increase the fiber's specific surface area while also reducing liquid flow resistance through their geometry, promoting axial liquid conduction. In terms of wettability, the groove edges are treated with hydroxylation (e.g., chemically grafting hydroxyl groups) to achieve hydrophilic anchoring, enhancing liquid adsorption. The central region of the grooves is treated with a fluoride coating or low-surface-energy material to create a hydrophobic region, which forms an alternating "hydrophilic-hydrophobic grid structure" with the hydrophilic regions at the edges. The inner walls of the pleated cross-shaped grooves display alternating hydrophilic and hydrophobic stripes, similar to a grid-like distribution. This allows for directional spreading of the liquid film through surface energy differences. The depth and width of the Coolmax fiber's cross-shaped grooves create a pore size gradient. Combined with the hydrophilic and hydrophobic grid structure, this structure drives liquids rapidly along the fiber surface through capillary forces. The cross-shaped cross section reduces the "three-phase contact line" between the liquid and the fiber surface, minimizing the pinning effect and alleviating localized stress concentration, allowing for smoother liquid flow.

[0026] This embodiment only represents a preferred implementation scheme of the ultrasonic atomization-liquid-conducting fiber coordinated regulation indirect evaporation falling film heat exchange system of the present invention. Any heat exchange system designed with similar technical features to the present invention will fall within the protection scope of the ultrasonic atomization-liquid-conducting fiber coordinated regulation indirect evaporation falling film heat exchange system of the present invention.

[0027] Example 2 The present embodiment provides an ultrasonic atomization-liquid-conducting fiber coordinated regulation indirect evaporation falling film heat exchange system, including a box body 602, on which a primary air inlet, a secondary air inlet, a product air outlet and a product air outlet are provided. The product air outlet is arranged on one side of the box body 602, and the product air outlet is arranged on the top of the box body 602. The primary air inlet is connected to the primary air inlet unit, and the secondary air inlet is connected to the secondary air inlet unit. A water reservoir 504 is provided in the box body 602, and an ultrasonic atomizer 801 is placed in the water reservoir 504. A plurality of circular tubes are provided above the water reservoir 504, and the plurality of circular tubes are evenly arranged horizontally above the water reservoir 504. The circular tubes are arranged between the primary air inlet and the product air outlet. Liquid-conducting fibers 701 are attached to the outer surface of the circular tubes, and the liquid-conducting fibers 701 are guided from the primary air inlet to the product air outlet.

[0028] This embodiment only represents the preferred embodiment of the ultrasonic atomization - liquid guiding fiber cooperative regulation indirect evaporation falling film heat exchange system of the present invention. Any heat exchange system designed with similar technical features to the present invention will fall within the protection scope of the ultrasonic atomization - liquid guiding fiber cooperative regulation indirect evaporation falling film heat exchange system of the present invention.

[0029] Embodiment 3 This embodiment provides an ultrasonic atomization - liquid guiding fiber cooperative regulation indirect evaporation falling film heat exchange system, including a box body 602. A primary air inlet, a secondary air inlet, a product air outlet and a product air outlet are arranged on the box body 602. The primary air inlet is connected with a primary air inlet unit, and the secondary air inlet is connected with a secondary air inlet unit. A water reservoir 504 is arranged in the box body 602. An ultrasonic atomizer 801 is placed in the water reservoir 504. A round tube is arranged above the water reservoir 504. The round tube is arranged between the primary air inlet and the product air outlet. A liquid guiding fiber 701 is attached to the outer surface of the round tube. The liquid guiding fiber 701 is guided from the primary air inlet to the product air outlet. ]>

[0030] The primary air inlet unit includes a primary air channel. One end of the primary air channel is a primary air inlet, and the other end is connected with the primary air inlet of the box body 602. A first variable frequency fan 101, a first evaporator 201 and a first flowmeter 301 are sequentially arranged in the primary air channel from the primary air inlet to the primary air inlet direction. The first variable frequency fan 101 and the first flowmeter 301 are respectively located at the inlet and outlet of the first evaporator 201.

[0031] The secondary air inlet unit includes a secondary air channel. One end of the secondary air channel is a secondary air inlet, and the other end is connected with the secondary air inlet of the box body 602. A second variable frequency fan 102, a second evaporator 202 and a second flowmeter 302 are sequentially arranged in the secondary air channel from the secondary air inlet to the secondary air inlet direction. The second variable frequency fan 102 and the second flowmeter 302 are respectively located at the inlet and outlet of the second evaporator 202. A humidifier 904 is arranged at the secondary air inlet of the secondary air channel.

[0032] This embodiment only represents the preferred embodiment of the ultrasonic atomization - liquid guiding fiber cooperative regulation indirect evaporation falling film heat exchange system of the present invention. Any heat exchange system designed with similar technical features to the present invention will fall within the protection scope of the ultrasonic atomization - liquid guiding fiber cooperative regulation indirect evaporation falling film heat exchange system of the present invention.

[0033] Embodiment 4 This embodiment provides an ultrasonic atomization - liquid - guiding fiber collaborative regulation indirect evaporation falling - film heat exchange system, which includes a box body 602. A primary air inlet, a secondary air inlet, a product air outlet and a product air outlet are arranged on the box body 602. The primary air inlet is connected to a primary air inlet unit, and the secondary air inlet is connected to a secondary air inlet unit. A water storage tank 504 is arranged inside the box body 602. The water storage tank 504 of the box body 602 is connected to a third low - temperature constant - temperature water bath device 503 through a variable - frequency circulation pump 403. An ultrasonic atomizer 801 is placed in the water storage tank 504. A circular tube is arranged above the water storage tank 504. The circular tube is arranged between the primary air inlet and the product air outlet. A liquid - guiding fiber 701 is attached to the outer surface of the circular tube, and the liquid - guiding fiber 701 is guided from the primary air inlet to the product air outlet.

[0034] The primary air inlet unit includes a primary air channel. One end of the primary air channel is a primary air inlet, and the other end is connected to the primary air inlet of the box body 602. Inside the primary air channel, a first variable - frequency fan 101, a first evaporator 201 and a first flowmeter 301 are sequentially arranged from the primary air inlet to the direction of the primary air inlet. The first variable - frequency fan 101 and the first flowmeter 301 are respectively located at the inlet and outlet of the first evaporator 201. The first evaporator 201 is connected to a first low - temperature constant - temperature water bath device 501 through a first peristaltic pump 401.

[0035] The secondary air inlet unit includes a secondary air channel. One end of the secondary air channel is a secondary air inlet, and the other end is connected to the secondary air inlet of the box body 602. Inside the secondary air channel, a second variable - frequency fan 102, a second evaporator 202 and a second flowmeter 302 are sequentially arranged from the secondary air inlet to the direction of the secondary air inlet. The second variable - frequency fan 102 and the second flowmeter 302 are respectively located at the inlet and outlet of the second evaporator 202. The second evaporator 202 is connected to a second low - temperature constant - temperature water bath device 502 through a second peristaltic pump 402. A humidifier 904 is arranged at the secondary air inlet of the secondary air channel.

[0036] This embodiment only represents the preferred implementation mode of the ultrasonic atomization - liquid - guiding fiber collaborative regulation indirect evaporation falling - film heat exchange system of the present invention. Any heat exchange system designed with technical features similar to those of the present invention will fall within the protection scope of the ultrasonic atomization - liquid - guiding fiber collaborative regulation indirect evaporation falling - film heat exchange system of the present invention.

[0037] Embodiment 5 This embodiment provides an ultrasonic atomization - liquid - guiding fiber collaborative regulation indirect evaporation falling - film heat exchange system, which includes a box body 602. A primary air inlet, a secondary air inlet, a product air outlet and a product air outlet are arranged on the box body 602. The primary air inlet is connected to a primary air inlet unit, and the secondary air inlet is connected to a secondary air inlet unit. A water reservoir 504 is arranged inside the box body 602. A first temperature sensor is arranged in the water reservoir 504. An ultrasonic atomizer 801 is placed in the water reservoir 504. A circular tube is arranged above the water reservoir 504. The circular tube is arranged between the primary air inlet and the product air outlet. A liquid - guiding fiber 701 is attached to the outer surface of the circular tube, and the liquid - guiding fiber 701 is guided from the primary air inlet to the product air outlet.

[0038] The primary air inlet unit includes a primary air passage. One end of the primary air passage is a primary air inlet, and the other end is connected to the primary air inlet of the box body 602. Inside the primary air passage, a first variable - frequency fan 101, a first evaporator 201 and a first flowmeter 301 are sequentially arranged from the primary air inlet to the primary air inlet direction. The first variable - frequency fan 101 and the first flowmeter 301 are respectively located at the inlet and outlet of the first evaporator 201.

[0039] The secondary air inlet unit includes a secondary air passage. One end of the secondary air passage is a secondary air inlet, and the other end is connected to the secondary air inlet of the box body 602. Inside the secondary air passage, a second variable - frequency fan 102, a second evaporator 202 and a second flowmeter 302 are sequentially arranged from the secondary air inlet to the secondary air inlet direction. The second variable - frequency fan 102 and the second flowmeter 302 are respectively located at the inlet and outlet of the second evaporator 202. A humidifier 904 is arranged at the secondary air inlet of the secondary air passage.

[0040] Sensor assemblies are arranged at the primary air inlet, secondary air inlet, working air outlet and product air outlet of the box body 602, and the sensor assemblies are located outside the box body 602. The sensor assemblies include a second temperature sensor, a humidity sensor and a pressure sensor.

[0041] This embodiment only represents the preferred implementation mode of the ultrasonic atomization - liquid - guiding fiber collaborative regulation indirect evaporation falling - film heat exchange system of the present invention. Any heat exchange system designed with technical features similar to those of the present invention will fall within the protection scope of the ultrasonic atomization - liquid - guiding fiber collaborative regulation indirect evaporation falling - film heat exchange system of the present invention.

[0042] Embodiment 6 This embodiment provides an ultrasonic atomization - liquid - guiding fiber collaborative regulation indirect evaporation falling - film heat exchange system, as Figure 1 shown, including a box body 602, as Figure 3As shown, a primary air inlet, a secondary air inlet, a product air outlet, and a product air outlet are provided on the box body 602. The product air outlet is provided on one side of the box body 602, and the product air outlet is provided on the top of the box body 602. The primary air inlet is connected to a primary air inlet unit, and the secondary air inlet is connected to a secondary air inlet unit. A water reservoir 504 is provided inside the box body 602. A first temperature sensor is provided in the water reservoir 504. The water reservoir 504 is connected to a third low-temperature constant temperature water bath device 503 through a variable frequency circulation pump 403. An ultrasonic atomizer 801 is placed in the water reservoir 504, as Figures 4 - 5 As shown, a plate falling film heat exchanger is provided above the water reservoir 504. The plate falling film heat exchanger includes a support frame. A plurality of round tubes are provided in the support frame. The plurality of round tubes are evenly arranged horizontally above the water reservoir 504. The round tubes are arranged between the primary air inlet and the product air outlet. A liquid guiding fiber 701 is attached to the outer surface of the round tube. The liquid guiding fiber 701 is guided from the primary air inlet to the product air outlet.

[0043] The primary air inlet unit includes a primary air channel. One end of the primary air channel is a primary air inlet, and the other end is connected to the primary air inlet of the box body 602. A first variable frequency fan 101, a first evaporator 201, and a first flow meter 301 are sequentially arranged in the primary air channel from the primary air inlet to the primary air inlet direction. The first variable frequency fan 101 and the first flow meter 301 are respectively located at the inlet and outlet of the first evaporator 201. The first evaporator 201 is connected to a first low-temperature constant temperature water bath device 501 through a first peristaltic pump 401.

[0044] The secondary air inlet unit includes a secondary air channel. One end of the secondary air channel is a secondary air inlet, and the other end is connected to the secondary air inlet of the box body 602. A second variable frequency fan 102, a second evaporator 202, and a second flow meter 302 are sequentially arranged in the secondary air channel from the secondary air inlet to the secondary air inlet direction. The second variable frequency fan 102 and the second flow meter 302 are respectively located at the inlet and outlet of the second evaporator 202. A humidifier 904 is provided at the secondary air inlet of the secondary air channel. The second evaporator 202 is connected to a second low-temperature constant temperature water bath device 502 through a second peristaltic pump 402.

[0045] Sensor components are provided at the primary air inlet, secondary air inlet, working air outlet, and product air outlet of the box body 602, and the sensor components are located outside the box body 602. The sensor components include a second temperature sensor, a humidity sensor, and a pressure sensor.

[0046] The ultrasonic atomization - liquid guiding fiber collaborative regulation indirect evaporation falling film heat exchange system further includes a controller 903, a computer 902, and a data acquisition instrument 901 that are connected in sequence. The data acquisition instrument 901 is respectively connected to a sensor assembly, a first flowmeter 301, and a second flowmeter 302. The controller 903 is respectively connected to a first evaporator 201, a first variable frequency fan 101, a second variable frequency fan 102, a second evaporator 202, a first peristaltic pump 401, a second peristaltic pump 402, and a variable frequency circulation pump 403.

[0047] The controller 903 simultaneously controls the variable frequency fan, the peristaltic pump, and the variable frequency circulation pump to control the air flow rate, temperature, and humidity. The data acquisition instrument 901 simultaneously collects the information of all sensors and flowmeters for computer analysis and regulation. The computer 902 receives the information from the data acquisition instrument and outputs it to the controller 903 for real-time regulation of the entire system.

[0048] This embodiment only represents the preferred implementation manner of the ultrasonic atomization - liquid guiding fiber collaborative regulation indirect evaporation falling film heat exchange system of the present invention. Any heat exchange system designed with technical features similar to those of the present invention will fall within the protection scope of the ultrasonic atomization - liquid guiding fiber collaborative regulation indirect evaporation falling film heat exchange system of the present invention.

[0049] Embodiment 7 This embodiment provides an ultrasonic atomization - liquid guiding fiber collaborative regulation indirect evaporation falling film heat exchange method, which uses the ultrasonic atomization - liquid guiding fiber collaborative regulation indirect evaporation falling film heat exchange system of Embodiment 6 to achieve air heat exchange and make the air reach the expected set temperature and humidity. Specifically: The air undergoes sensible heat and latent heat exchange through the primary air inlet unit, and the first evaporator 201 is used to achieve cooling and humidification to obtain primary air, which flows through the liquid guiding fiber 701 in the box body 602 to the product air outlet. According to the set air temperature and humidity, it is judged whether the temperature and humidity of the primary air meet the requirements. If the temperature and humidity all meet the expected settings, the air is directly discharged from the product air outlet without opening the secondary air inlet unit. When the temperature reaches the requirement but the humidity does not meet the standard, that is, when the air needs to be humidified, the air passes through the secondary air inlet unit to obtain pre-treated air. The pre-treated air enters the box body 602, and then the liquid water in the water storage tank 504 is atomized by the ultrasonic atomizer 801. The atomized water is mixed with the pre-treated air and flows through the liquid guiding fiber 701 to form a high-humidity air flow that meets the humidity requirement to obtain secondary air, and the secondary air is discharged from the product air outlet. The air discharged from the product air outlet reaches the expected set temperature and humidity.

[0050] Monitor the temperatures, humidities, and pressures at the primary air inlet, secondary air inlet, product air outlet, and the four places of the product air outlet of the box body 602, as well as the temperature in the reservoir 504, and perform dynamic optimization. If the primary air does not meet the expected set temperature and humidity, humidification is carried out through the secondary air inlet so that the air discharged from the product air outlet reaches the expected set temperature and humidity.

[0051] This embodiment only represents the preferred implementation mode of the ultrasonic atomization - liquid guiding fiber collaborative regulation indirect evaporation falling film heat exchange method of the present invention. Any heat exchange method designed by adopting technical features similar to those of the present invention will fall within the protection scope of the ultrasonic atomization - liquid guiding fiber collaborative regulation indirect evaporation falling film heat exchange method of the present invention.

[0052] The ultrasonic atomization - liquid guiding fiber collaborative regulation indirect evaporation falling film heat exchange method of the present invention suppresses the liquid film instability and rupture during heat exchange while significantly improving the temperature and humidity regulation accuracy and energy utilization efficiency through hierarchical cooling, precise humidification, and closed-loop feedback control. It has a wide range of applications and broad application prospects.

Claims

1. An ultrasonic atomization - liquid guiding fiber collaborative regulation indirect evaporation falling film heat exchange system, characterized in that, It includes a box body (602) provided with a primary air inlet, a secondary air inlet, a product air outlet and a product air outlet. The primary air inlet is connected to a primary air inlet unit, and the secondary air inlet is connected to a secondary air inlet unit. A water storage tank (504) is arranged in the box body (602), and an ultrasonic atomizer (801) is placed in the water storage tank (504). A round tube is arranged above the water storage tank (504), and the round tube is arranged between the primary air inlet and the product air outlet. A liquid guide fiber (701) is attached to the outer surface of the round tube, and the liquid guide fiber (701) guides from the primary air inlet to the product air outlet.

2. The ultrasonic atomization-liquid-conducting fiber coordinated control indirect evaporation falling film heat exchange system according to claim 1 is characterized in that: The primary air inlet unit includes a primary air passage. One end of the primary air passage is a primary air inlet, and the other end is connected to the primary air inlet of the box body (602). A first variable-frequency fan (101), a first evaporator (201) and a first flowmeter (301) are sequentially arranged in the primary air passage from the primary air inlet to the primary air inlet direction. The first variable-frequency fan (101) and the first flowmeter (301) are respectively located at the inlet and outlet of the first evaporator (201).

3. The ultrasonic atomization-liquid-conducting fiber coordinated control indirect evaporation falling film heat exchange system according to claim 2, characterized in that: The secondary air inlet unit includes a secondary air passage. One end of the secondary air passage is a secondary air inlet, and the other end is connected to the secondary air inlet of the box body (602). A second variable-frequency fan (102), a second evaporator (202) and a second flowmeter (302) are sequentially arranged in the secondary air passage from the secondary air inlet to the secondary air inlet direction. The second variable-frequency fan (102) and the second flowmeter (302) are respectively located at the inlet and outlet of the second evaporator (202). A humidifier (904) is arranged at the secondary air inlet of the secondary air passage.

4. The ultrasonic atomization-liquid-conducting fiber coordinated control indirect evaporation falling film heat exchange system according to claim 3, characterized in that: The first evaporator (201) is connected to a first low-temperature constant-temperature water bath device (501) through a first peristaltic pump (401), the second evaporator (202) is connected to a second low-temperature constant-temperature water bath device (502) through a second peristaltic pump (402), and the water storage tank (504) of the box body (602) is connected to a third low-temperature constant-temperature water bath device (503) through a variable-frequency circulation pump (403).

5. The ultrasonic atomization - liquid guiding fiber collaborative regulation indirect evaporation falling film heat exchange system according to claim 4, characterized in that, The liquid guide fiber (701) is a coolmax fiber.

6. The ultrasonic atomization-liquid-conducting fiber coordinated control indirect evaporation falling film heat exchange system according to claim 1, characterized in that: A first temperature sensor is arranged in the water storage tank (504); Sensor components are arranged at the primary air inlet, secondary air inlet, working air outlet and product air outlet of the box body (602), and the sensor components are located outside the box body (602). The sensor components include a second temperature sensor, a humidity sensor and a pressure sensor.

7. The indirect evaporation falling film heat exchange system with ultrasonic atomization-liquid guiding fiber collaborative regulation according to claim 1, wherein, A plurality of the round tubes are arranged, and the plurality of round tubes are evenly arranged horizontally above the water storage tank (504).

8. The indirect evaporation falling film heat exchange system with synergistic regulation of ultrasonic atomization and liquid guiding fibers according to claim 1, wherein The product air outlet is arranged on one side of the box body (602), and the product air outlet is arranged on the top of the box body (602).

9. Ultrasonic atomization-liquid-conducting fiber coordinated control indirect evaporation falling film heat exchange method, characterized in that: The ultrasonic atomization-liquid guide fiber cooperative regulation indirect evaporation and falling film heat exchange system described in claim 3 is used to realize air heat exchange, so that the air reaches the expected set temperature and humidity.

10. The ultrasonic atomization-liquid-conducting fiber coordinated control indirect evaporation falling film heat exchange method according to claim 9, characterized in that: Specifically, air undergoes sensible and latent heat exchange through the primary air inlet unit, and is cooled and humidified by using the first evaporator (201) to obtain primary air. The primary air flows through the liquid-conducting fiber (701) in the box body (602) and leads to the product air outlet; According to the judged air temperature and humidity set, it is determined whether the temperature and humidity of the primary air meet the requirements. If all the temperature and humidity meet the expected settings, the air is directly discharged from the product air outlet without turning on the secondary air inlet unit; when the temperature reaches the requirement but the humidity does not meet the standard, that is, when the air needs to be humidified, the air passes through the secondary air inlet unit to obtain pre-treated air. The pre-treated air enters the box body (602), and then the liquid water in the water storage tank (504) is atomized by the ultrasonic atomizer (801). The atomized water is mixed with the pre-treated air and flows through the liquid-conducting fiber (701) to form a high-humidity air flow that meets the humidity requirement, obtaining secondary air. The secondary air is discharged from the product air outlet, and the air discharged from the product air outlet reaches the expected set temperature and humidity.

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