Ultrasonic atomization liquid-guiding fiber coordinated control indirect evaporation falling film heat exchange system and method

Abstract

The present invention discloses an ultrasonic atomization-liquid-conducting fiber coordinated control indirect evaporation falling film heat exchange system, comprising a housing, a primary air inlet unit, and a secondary air inlet unit. A water reservoir is provided in the housing, an ultrasonic atomizer is placed in the water reservoir, a circular tube is provided above the water reservoir, the circular tube is provided between the primary air inlet and the product air outlet, and liquid-conducting fibers are attached to the outer surface of the circular tube. The present invention solves the problem of easy rupture of the liquid film of the existing evaporation falling film heat exchanger. The present invention also discloses an ultrasonic atomization-liquid-conducting fiber coordinated control indirect evaporation falling film heat exchange system. The ultrasonic atomization-liquid-conducting fiber coordinated control indirect evaporation falling film heat exchange system of the present invention is used to realize air heat exchange, so that the air reaches the expected set temperature and humidity. The present invention avoids the instability and rupture of the liquid film during heat exchange, and the system responds rapidly in multiple ways and accurately 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 indirect evaporation falling film heat exchange system with coordinated regulation of ultrasonic atomization and liquid-conducting fibers, and also relates to an indirect evaporation falling film heat exchange method with coordinated regulation of ultrasonic atomization and liquid-conducting fibers. Background Art

[0002] In the development of modern science and technology, evaporative falling film heat transfer technology, as a key branch of phase change heat transfer, has evolved inextricably with the need for efficient thermal management. The core mechanism of this technology is based on the thin layer flow of a liquid film along a vertical or inclined surface driven by gravity, achieving energy exchange through the coupled transfer of sensible and latent heat at the gas-liquid interface. Traditional falling film systems generally utilize smooth tubes or micro-fin tube structures, but these systems are limited by issues such as uneven liquid film distribution and insufficient suppression of interfacial turbulence, resulting in significant discrepancies between actual heat transfer efficiency and theoretical values.

[0003] As research in fluid mechanics deepens, researchers have discovered that liquid film instability caused by dynamic wetting hysteresis is a key factor limiting performance. When the system is perturbed by an external field, the mismatch between substrate surface heterogeneity and the liquid's relaxation properties hinders the motion of the three-phase contact line, forming a localized capillary pressure gradient that ultimately triggers liquid film rupture. To address this, researchers have proposed a multiscale surface modification strategy: using micro- and nanostructured surfaces to enhance liquid film uniformity through capillary suction.

[0004] In modern life, temperature and humidity control achieved through evaporative falling film heat exchange technology is crucial for clothing storage, food preservation, and health management. Traditional methods, such as air drying or simple dehumidifiers, are susceptible to weather conditions and offer inconsistent results. Evaporative falling film heat exchangers, on the other hand, achieve efficient cooling or heating through heat exchange between the liquid film and the air. The large contact area between the liquid film and the air results in high heat exchange efficiency, significantly reducing energy consumption.

[0005] An evaporative falling film heat exchanger is a highly efficient heat exchange device that exchanges heat with a gas or another fluid by forming a thin film of liquid on a vertical surface. Its main components include a liquid distributor (for uniform liquid distribution), a heat transfer surface (for forming the liquid film), a gas channel (for contact and heat exchange with the liquid film), and a housing (for support and sealing). It offers advantages such as high efficiency, energy saving, and compactness, and is widely used in air conditioners, water heaters, and other fields. Traditional falling film heat exchangers often utilize independent modules, resulting in slow response, insufficient control accuracy, unstable liquid film formation, and rupture. Liquid film instability and rupture are a common yet critical issue in falling film heat exchangers. The source of liquid film rupture is the formation of non-equilibrium wetting hysteresis, an imbalance between interfacial energy transfer and dissipation during dynamic wetting. When an external field (such as shear flow, temperature gradient, or mechanical vibration) drives the contact line to move, surface roughness or chemical heterogeneity, coupled with differences in the relaxation rate of liquid molecules, leads to contact angle hysteresis: localized potential barriers on the solid surface hinder the contact line from sliding, causing interfacial stress accumulation and energy dissipation, preventing the system from reaching thermodynamic equilibrium. This non-equilibrium characteristic reshapes the internal stress distribution of the liquid film through capillary pressure gradients, promoting the formation and expansion of localized cavitation nuclei during the drainage process of the nanoscale liquid film, ultimately causing the liquid film to become unstable and rupture. Besides the common problem of liquid film rupture in falling film heat exchangers, existing systems still have significant room for improvement in heat and moisture exchange efficiency, multi-parameter coordinated control, and intelligent management. Summary of the Invention

[0006] The purpose of the present invention is to provide an ultrasonic atomization-liquid-conducting fiber coordinated control indirect evaporation falling film heat exchange system, which solves the problem that the liquid film of the existing evaporation falling film heat exchanger is easily broken.

[0007] The technical solution adopted by the present invention is an ultrasonic atomization-liquid-conducting fiber coordinated regulation indirect evaporation falling film heat exchange system, which includes a box body, on which a primary air inlet, a secondary air inlet, a working air outlet and a product air outlet are provided. 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 provided in the box body, in which an ultrasonic atomizer is placed, and above the water reservoir a circular tube is provided, which is provided between the primary air inlet and the product air outlet. Liquid-conducting fibers are attached to the outer surface of the circular tube, and the liquid-conducting fibers are guided from the primary air inlet to the product air outlet.

[0008] The present invention is also characterized in that:

[0009] The primary air intake unit includes a primary air channel, one end of the primary air channel is the primary air inlet, and the other end is connected to the primary air inlet of the box. The first variable frequency fan, the first evaporator and the first flow meter are arranged in sequence from the primary air inlet to the primary air inlet in the primary air channel. The first variable frequency fan and the first flow meter are located at the inlet and outlet of the first evaporator respectively.

[0010] The secondary air intake unit includes a secondary air channel, one end of which is a secondary air inlet, and the other end is connected to the secondary air inlet of the box. A second variable frequency fan, a second evaporator and a second flow meter are arranged in sequence from the secondary air inlet to the secondary air inlet in the secondary air channel. The second variable frequency fan and the second flow meter are located at the inlet and outlet of the second evaporator respectively. A humidifier is provided at the secondary air inlet of the secondary air channel.

[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, and the water reservoir of the box 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;

[0014] A sensor assembly is provided at the primary air inlet, secondary air inlet, working air outlet and product air outlet of the box body, and the sensor assembly is located outside the box body. The sensor assembly includes a second temperature sensor, a humidity sensor and a pressure sensor.

[0015] A plurality of circular pipes are provided, and the plurality of circular pipes are evenly and horizontally arranged above the water reservoir.

[0016] The product air outlet is set on one side of the box, and the working air outlet is set on the top of the box.

[0017] The beneficial effects of the present invention are:

[0018] 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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;

[0020] 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;

[0022] 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;

[0023] 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.

[0024] In the figure, 101. first variable frequency fan, 102. second variable frequency fan;

[0025] 201. First evaporator, 202. Second evaporator;

[0026] 301. First flow meter, 302. Second flow meter;

[0027] 401. First peristaltic pump, 402. Second peristaltic pump, 403. Variable frequency circulation pump;

[0028] 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 reservoir;

[0029] 602. Box, 701. Liquid-conducting fiber, 801. Ultrasonic atomizer;

[0030] 901. Data acquisition instrument, 902. Computer, 903. Controller, 904. Humidifier. DETAILED DESCRIPTION

[0031] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] Example 1

[0033] This embodiment provides an ultrasonic atomization-liquid-conducting fiber coordinated control indirect evaporation falling film heat exchange system, such as Figure 1 As shown, it includes a box body 602, and the box body 602 is provided with a primary air inlet, a secondary air inlet, a working air outlet and a product air outlet. 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 circular tube is provided above the water reservoir 504, and the circular tube is provided between the primary air inlet and the product air outlet. A liquid guide fiber 701 is attached to the outer surface of the circular tube, and the liquid guide fiber 701 is guided from the primary air inlet to the product air outlet.

[0034] 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.

[0035] 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.

[0036] Example 2

[0037] 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 working 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 working air outlet is arranged 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 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 uniformly 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.

[0038] 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.

[0039] Example 3

[0040] 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 working air outlet and a product air outlet are provided. 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 in the box body 602, in which an ultrasonic atomizer 801 is placed. A circular tube is provided above the water reservoir 504, and the circular tube is provided between the primary air inlet and the product air outlet. A liquid-conducting fiber 701 is attached to the outer surface of the circular tube, and the liquid-conducting fiber 701 is guided from the primary air inlet to the product air outlet.

[0041] The primary air intake unit includes a primary air channel, one end of which is a primary air inlet, and the other end is connected to the primary air inlet of the box body 602. The first variable frequency fan 101, the first evaporator 201 and the first flow meter 301 are arranged in sequence from the primary air inlet to the primary air inlet in the primary air channel. 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.

[0042] The secondary air intake unit includes a secondary air channel, one end of which is a secondary air inlet, and the other end is connected to the secondary air inlet of the box body 602. In the secondary air channel, a second variable frequency fan 102, a second evaporator 202 and a second flow meter 302 are arranged in sequence from the secondary air inlet to the secondary air inlet. 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.

[0043] 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.

[0044] Example 4

[0045] This embodiment provides an ultrasonic atomization-liquid-conducting fiber coordinated regulation indirect evaporation falling film heat exchange system, including a box 602, on which a primary air inlet, a secondary air inlet, a working air outlet and a product air outlet are provided. 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 in the box 602, and the water reservoir 504 of the box 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 reservoir 504, and a circular tube is provided above the water reservoir 504. The circular tube is provided between the primary air inlet and the product air outlet, and a liquid-conducting fiber 701 is attached to the outer surface of the circular tube, and the liquid-conducting fiber 701 is guided from the primary air inlet to the product air outlet.

[0046] The primary air intake unit includes a primary air channel, one end of which is a primary air inlet, and the other end is connected to the primary air inlet of the box 602. The first variable frequency fan 101, the first evaporator 201 and the first flow meter 301 are arranged in sequence from the primary air inlet to the primary air inlet in the primary air channel. 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 the first low-temperature constant temperature water bath device 501 through the first peristaltic pump 401.

[0047] The secondary air intake unit includes a secondary air channel, one end of which is a secondary air inlet, and the other end is connected to the secondary air inlet of the box 602. A second variable frequency fan 102, a second evaporator 202 and a second flow meter 302 are arranged in sequence from the secondary air inlet to the secondary air inlet in the secondary air channel. 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. 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 provided at the secondary air inlet of the secondary air channel.

[0048] 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.

[0049] Example 5

[0050] 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 working air outlet and a product air outlet are provided. 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 in the box body 602, in which a first temperature sensor is provided, and an ultrasonic atomizer 801 is placed in the water reservoir 504. A circular tube is provided above the water reservoir 504, and the circular tube is provided between the primary air inlet and the product air outlet. A liquid-conducting fiber 701 is attached to the outer surface of the circular tube, and the liquid-conducting fiber 701 is guided from the primary air inlet to the product air outlet.

[0051] The primary air intake unit includes a primary air channel, one end of which is a primary air inlet, and the other end is connected to the primary air inlet of the box body 602. The first variable frequency fan 101, the first evaporator 201 and the first flow meter 301 are arranged in sequence from the primary air inlet to the primary air inlet in the primary air channel. 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.

[0052] The secondary air intake unit includes a secondary air channel, one end of which is a secondary air inlet, and the other end is connected to the secondary air inlet of the box body 602. In the secondary air channel, a second variable frequency fan 102, a second evaporator 202 and a second flow meter 302 are arranged in sequence from the secondary air inlet to the secondary air inlet. 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.

[0053] Sensor components are provided at the primary air inlet, secondary air inlet, working air outlet and product air outlet of the box 602, and the sensor components are located outside the box 602. The sensor components include a second temperature sensor, a humidity sensor and a pressure sensor.

[0054] 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.

[0055] Example 6

[0056] This embodiment provides an ultrasonic atomization-liquid-conducting fiber coordinated control indirect evaporation falling film heat exchange system, such as Figure 1 As shown, it includes a box 602, such as Figure 3As shown, the box body 602 is provided with a primary air inlet, a secondary air inlet, a working air outlet and a product air outlet. The product air outlet is provided on one side of the box body 602, the working air outlet is provided on the top of the box body 602, the primary air inlet is connected to the primary air inlet unit, the secondary air inlet is connected to the secondary air inlet unit, a water reservoir 504 is provided in the box body 602, a first temperature sensor is provided in the water reservoir 504, the water reservoir 504 is connected to the third low-temperature constant-temperature water bath device 503 through the variable-frequency circulation pump 403, and an ultrasonic atomizer 801 is placed in the water reservoir 504. Figure 4-5 As shown, a plate falling film heat exchanger is arranged above the water reservoir 504. The plate falling film heat exchanger includes a support frame. A plurality of circular tubes are arranged in the support frame. The plurality of circular tubes are evenly and horizontally arranged above the water reservoir 504. The circular tubes are arranged between the primary air inlet and the product air outlet. Liquid guiding fibers 701 are attached to the outer surface of the circular tubes. The liquid guiding fibers 701 are guided from the primary air inlet to the product air outlet.

[0057] The primary air intake unit includes a primary air channel, one end of which is a primary air inlet, and the other end is connected to the primary air inlet of the box 602. The first variable frequency fan 101, the first evaporator 201 and the first flow meter 301 are arranged in sequence from the primary air inlet to the primary air inlet in the primary air channel. 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 the first low-temperature constant temperature water bath device 501 through the first peristaltic pump 401.

[0058] The secondary air intake unit includes a secondary air channel, one end of which is a secondary air inlet, and the other end is connected to the secondary air inlet of the box 602. In the secondary air channel, a second variable frequency fan 102, a second evaporator 202 and a second flow meter 302 are arranged in sequence from the secondary air inlet to the secondary air inlet. 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, and the second evaporator 202 is connected to a second low-temperature constant temperature water bath device 502 through a second peristaltic pump 402.

[0059] Sensor components are provided at the primary air inlet, secondary air inlet, working air outlet and product air outlet of the box 602, and the sensor components are located outside the box 602. The sensor components include a second temperature sensor, a humidity sensor and a pressure sensor.

[0060] The ultrasonic atomization-liquid-conducting fiber coordinated control indirect evaporation falling film heat exchange system also includes a controller 903, a computer 902 and a data acquisition instrument 901 connected in sequence. The data acquisition instrument 901 is respectively connected to the sensor component, the first flow meter 301, and the second flow meter 302. The controller 903 is respectively connected to the first evaporator 201, the first variable frequency fan 101, the second variable frequency fan 102, the second evaporator 202, the first peristaltic pump 401, the second peristaltic pump 402, and the variable frequency circulation pump 403.

[0061] The controller 903 simultaneously controls the variable frequency fan, peristaltic pump, and variable frequency circulation pump to control the air flow rate and temperature and humidity; the data acquisition instrument 901 simultaneously collects information from all sensors and flow meters for computer analysis and control; the computer 902 receives information from the data acquisition instrument and outputs it to the controller 903 for real-time control of the entire system.

[0062] 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.

[0063] Example 7

[0064] This embodiment provides an ultrasonic atomization-liquid-conducting fiber coordinated control indirect evaporation falling film heat exchange method. The ultrasonic atomization-liquid-conducting fiber coordinated control indirect evaporation falling film heat exchange system of Example 6 is used to achieve air heat exchange, so that the air reaches the expected set temperature and humidity. Specifically:

[0065] The air passes through the primary air inlet unit to exchange sensible heat and latent heat, and is cooled by the first evaporator 201 to obtain primary air, which flows through the liquid guide fiber 701 in the box 602 to the product outlet;

[0066] 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 602, and then the liquid water in the water reservoir 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 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.

[0067] The temperature, humidity, pressure at the primary air inlet, secondary air inlet, product air outlet and product air outlet of the box 602 as well as the temperature inside the water reservoir 504 are monitored and dynamically optimized. If the primary air does not meet the expected temperature and humidity, the secondary air inlet will be used for humidification so that the air discharged from the product air outlet reaches the expected temperature and humidity.

[0068] This embodiment only represents a preferred implementation method of the ultrasonic atomization-liquid-conducting fiber coordinated regulation indirect evaporation falling film heat exchange method of the present invention. Any heat exchange method designed with technical features similar to those of the present invention will fall within the protection scope of the ultrasonic atomization-liquid-conducting fiber coordinated regulation indirect evaporation falling film heat exchange method of the present invention.

[0069] The ultrasonic atomization-liquid-conducting fiber coordinated control indirect evaporation falling film heat exchange method of the present invention suppresses the instability and rupture of the liquid film during heat exchange through graded cooling, precise humidification and closed-loop feedback control, while significantly improving the temperature and humidity control accuracy and energy utilization efficiency. It has a wide range of applications and broad application prospects.

Claims

1. Ultrasonic atomization-liquid-conducting fiber coordinated control indirect evaporation falling film heat exchange system, characterized by: The invention comprises a box body (602), wherein the box body (602) is provided with a primary air inlet, a secondary air inlet, a working air outlet and a product air outlet, wherein 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, wherein a water reservoir (504) is provided in the box body (602), wherein an ultrasonic atomizer (801) is placed in the water reservoir (504), and a circular tube is provided above the water reservoir (504), wherein the circular tube is provided between the primary air inlet and the product air outlet, and wherein a liquid guiding fiber (701) is attached to the outer surface of the circular tube, and wherein the liquid guiding fiber (701) is guided 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 comprises a primary air channel, one end of the primary air channel being a primary air inlet, and the other end being connected to the primary air inlet of the box (602), a first variable frequency fan (101), a first evaporator (201) and a first flow meter (301) being arranged in sequence in the primary air channel from the primary air inlet to the primary air inlet, and the first variable frequency fan (101) and the first flow meter (301) being located at the inlet and outlet of the first evaporator (201), respectively.

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 intake unit comprises a secondary air channel, one end of the secondary air channel being a secondary air inlet, and the other end being connected to the secondary air inlet of the box (602), a second variable frequency fan (102), a second evaporator (202) and a second flow meter (302) being arranged in sequence in the secondary air channel from the secondary air inlet to the secondary air inlet, the second variable frequency fan (102) and the second flow meter (302) being located at the inlet and outlet of the second evaporator (202), respectively, and a humidifier (904) being arranged at the secondary air inlet of the secondary air channel.

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) via a first peristaltic pump (401), the second evaporator (202) is connected to a second low-temperature constant-temperature water bath device (502) via a second peristaltic pump (402), and the water reservoir (504) of the box (602) is connected to a third low-temperature constant-temperature water bath device (503) via a variable-frequency circulation pump (403).

5. The ultrasonic atomization-liquid-conducting fiber coordinated control indirect evaporation falling film heat exchange system according to claim 4, characterized in that: The liquid-conducting 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 provided in the water reservoir (504); Sensor components are provided at the primary air inlet, the secondary air inlet, the working air outlet and the product air outlet of the box (602), and the sensor components are located outside the box (602). The sensor components include a second temperature sensor, a humidity sensor and a pressure sensor.

7. The ultrasonic atomization-liquid-conducting fiber coordinated control indirect evaporation falling film heat exchange system according to claim 1, characterized in that: A plurality of circular tubes are provided, and the plurality of circular tubes are evenly and horizontally arranged above the water reservoir (504).

8. The ultrasonic atomization-liquid-conducting fiber coordinated control indirect evaporation falling film heat exchange system according to claim 1, characterized in that: The product air outlet is arranged on one side of the box body (602), and the working air outlet is arranged on the top of the box body (602).

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