Evaporator structure combined with rectangular mist capturing harp and manufacturing method thereof

Abstract

The invention relates to the technical field of air treatment and evaporators, and discloses an evaporator structure combined with a rectangular mist catching harp and a manufacturing method thereof.The evaporator structure comprises a cooling liquid guide pipe, and the cooling liquid guide pipe is arranged in a U shape, located in an evaporator and used for transferring cooling capacity to achieve the heat exchange function; and the rectangular mist catching harp is positioned on one side of the air inlet of the evaporator and consists of a rectangular metal frame and stainless steel filaments which are arranged at equal intervals. Through the arrangement of the rectangular mist catching harp, when high-humidity air passes through the harp, part of water vapor is pre-cooled and condensed on the surfaces of the low-temperature filaments and is rapidly guided away, the latent heat load of a core area of the evaporator is reduced, and attenuation of a wet working condition to the heat exchange efficiency is reduced; the harp serves as a front filter screen, liquid drops in air are intercepted and rapidly guided away, and the situation that the liquid drops directly impact an evaporator guide pipe to form incrustation or ice blockage is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of air treatment and evaporator, in particular to an evaporator structure combined with a rectangular mist harp and a manufacturing method thereof. Background Art

[0002] In modern industrial and environmental protection equipment, evaporators are widely used in air conditioning, refrigeration, dehumidification and other fields as a key heat exchange device. Traditional evaporator structures usually adopt fin-type or tube-type designs, which have certain limitations in heat exchange efficiency, energy utilization and water vapor capture. Especially in high humidity environments, traditional evaporator structures often have difficulty in efficiently capturing water vapor in the air, resulting in the accumulation of condensed water and a decrease in evaporation efficiency, affecting the performance and life of the equipment.

[0003] In the existing evaporator structure, although some designs have introduced mist capture devices to improve the capture efficiency of water vapor, these devices often have some shortcomings. For example, the structure of the mist capture device is complex, the manufacturing cost is high, and it is easy for the filaments to contact each other due to vibration or thermal expansion and contraction, thereby reducing the mist capture efficiency. In addition, traditional mist capture devices usually lack an effective water-guiding structure, and the captured water vapor cannot be quickly discharged. It is easy to accumulate on the filaments, further affecting the mist capture effect. In addition, some mist capture devices also have problems such as inaccurate temperature control and unsatisfactory refrigeration effect in actual applications, which results in the inability to quickly condense water vapor and affects the overall performance. Summary of the invention

[0004] The present invention aims to solve the technical problems of low fog collection efficiency, insufficient heat exchange performance and poor equipment durability of existing evaporators during air treatment, and proposes an evaporator structure combined with a rectangular fog harp and a manufacturing method thereof. By optimizing the design and manufacturing process of the fog harp, the overall performance of the evaporator is significantly improved.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: an evaporator structure combined with a rectangular mist harp, comprising: A coolant conduit, which is arranged in a U shape and is located inside the evaporator, and is used to transfer cold to achieve a heat exchange function; A rectangular mist harp is located at one side of the air inlet of the evaporator and is composed of a rectangular metal frame and stainless steel filaments arranged at equal intervals.

[0006] Preferably, the diameter of the stainless steel filaments is about 250 μm, and the spacing is between 0.5-3 mm; The rectangular fog catching harp can also be arranged at intervals along the direction from the U-shaped opening end to the closed end of the U-shaped coolant conduit, and the spacing between the adjacent coolant conduits is 5-15 mm.

[0007] Preferably, a manufacturing method of a rectangular fog-catching harp structure includes the following steps: Step 1: Pretreatment of the rectangular metal frame. Clean the surface of the rectangular metal frame and perform anti-corrosion treatment. Use electrochemical polishing technology to remove the surface oxide layer, and enhance its anti-corrosion performance by spraying a nano-scale hydrophobic coating. The coating thickness is controlled within 5 - 20 μm to extend the service life of the metal frame. Step 2: Arrangement of stainless steel filaments. Fix stainless steel filaments with a diameter of 250 μm on the rectangular metal frame at equal intervals. The spacing range is 0.5 - 3 mm, and the spacing is dynamically adjusted according to the length of the rectangular metal frame. When the length L exceeds 1 m, the spacing S is calculated according to the formula S = 0.5 + 0.002L to ensure that the stainless steel filaments do not contact each other due to vibration or thermal expansion and contraction. Step 3: Assembly of the fog-catching harp. Arrange multiple rectangular metal frames in parallel according to the air flow direction. The distance D between adjacent rectangular metal frames is adjusted according to the environmental humidity H and air flow velocity V, satisfying the formula D = 10H / V to ensure that the fog-catching harp can efficiently intercept water vapor. Step 4: Design of the water guiding structure. Install a micro water guiding groove at the bottom of each stainless steel filament. The width of the water guiding groove is 0.5 - 1 mm, and the depth is 0.3 - 0.8 mm. The captured water vapor is quickly guided out through capillary action to avoid water droplet accumulation affecting the fog-catching efficiency. Step 5: Optimization of the temperature field. Set up an auxiliary cooling device around the fog-catching harp. Use a semiconductor refrigeration chip to reduce the surface temperature of the harp below the dew point. The working current I of the refrigeration chip satisfies the formula I = P / (Uη), where P is the refrigeration power, U is the voltage, and η is the refrigeration efficiency, to ensure rapid condensation of water vapor. Step 6: Overall testing and calibration. After completion of the assembly, conduct a simulated environment test on the fog-catching harp, record the fog-catching efficiency under different humidity and flow velocity conditions, and fine-tune the spacing of the stainless steel filaments and the size of the water guiding groove according to the test results to ensure the best performance.

[0008] Preferably, the material of the rectangular metal frame in Step 1 is aluminum alloy, and the thermal conductivity of the aluminum alloy is greater than 150 W / (m・K), and the tensile strength is between 100 - 200 MPa.

[0009] Preferably, by adjusting the number N and arrangement method of the rectangular metal frames, the fog-catching requirements under different humidity and flow velocity conditions are met. The specific number N is calculated according to the formula N = H / 10 + V / 5.

[0010] Preferably, the inner wall of the water guiding groove is coated with a hydrophilic nano-coating, and the coating thickness is 1 - 5 μm to enhance the fluidity of water droplets and reduce residues.

[0011] Preferably, during the testing in Step Six, the durability assessment of the fog-catching harp is also included, and products with a fog-catching efficiency lower than 85% or a water guiding time exceeding 10 seconds are excluded.

[0012] Preferably, the dynamic spacing adjustment of the stainless steel filaments further includes: Measuring the vibration frequencies of rectangular metal frames of different lengths during actual use and recording the corresponding data; Analyzing the relationship between the vibration frequency and the spacing of the stainless steel filaments; Adjusting the spacing S of the stainless steel filaments based on the measured vibration frequency; If the vibration frequency is F and when F > Fmax, set the stainless steel filament spacing S = S1; when F < Fmin, set the stainless steel filament spacing S = S2, where S represents the stainless steel filament spacing, F represents the vibration frequency, and Fmax and Fmin respectively represent the preset maximum and minimum vibration frequency limits.

[0013] The present invention provides an evaporator structure combined with a rectangular fog-catching harp and its manufacturing method. It has the following beneficial effects: 1. Through the setting of the rectangular fog-catching harp in the present invention, when high-humidity air passes through the harp, part of the water vapor pre-condenses on the surface of the low-temperature filaments, reducing the latent heat load in the core area of the evaporator and reducing the attenuation of the heat transfer efficiency under the "wet condition"; the harp serves as a "front filter" to intercept liquid droplets in the air and prevent the liquid droplets from directly hitting the evaporator conduit to form water scale or ice blockage.

[0014] 2. Through the dynamic spacing adjustment of the stainless steel filaments and the water guide groove design in the present invention, the accumulation of water droplets is avoided, thereby improving the fog-catching efficiency; the introduction of the auxiliary cooling device ensures the rapid condensation of water vapor and further improves the fog-catching effect.

[0015] 3. The dynamic spacing adjustment of the stainless steel filaments and the water guide groove design in the present invention avoid the accumulation of water droplets, thereby improving the fog-catching efficiency; the introduction of the auxiliary cooling device ensures the rapid condensation of water vapor and further improves the fog-catching effect. The anti-corrosion treatment and hydrophobic coating of the rectangular metal frame significantly extend the service life of the device; the dynamic parameter adjustment and test calibration in the manufacturing method ensure the best performance of the device under different environmental conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the rectangular fog-catching harp and the coolant conduit in the present invention; Figure 2 It is a schematic structural diagram of the rectangular fog-catching harp in the present invention; Figure 3 It is a flowchart of the manufacturing method in the present invention; Figure 4Flow chart of the pretreatment of the metal frame in the present invention; Figure 5 Flow chart of the arrangement of the stainless steel filaments in the present invention; Figure 6 Flow chart of the assembly of the fog-catching harp in the present invention; Figure 7 Flow chart of the overall test and calibration in the present invention.

[0017] Among them, 1. Rectangular fog-catching harp; 2. Rectangular metal frame; 3. Stainless steel filaments; 4. Coolant conduit. Detailed implementation manners

[0018] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the drawings of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0019] The present invention provides an evaporator structure combined with a rectangular fog-catching harp and a manufacturing method thereof. The following will Figure 1 - Attach Figure 7 be a detailed description of the specific implementation manners of the present invention. The technical solutions involved in this implementation manner aim to significantly improve the overall performance of the evaporator and ensure its efficient operation in practical applications by optimizing the design and manufacturing process of the fog-catching harp.

[0020] As Figure 1 shown, the core structure of the present invention includes a coolant conduit 4 and a rectangular fog-catching harp 1. The coolant conduit 4 is arranged in a U shape and is located inside the evaporator, and is used to transfer cold energy to achieve the heat exchange function. The design of the coolant conduit 4 promotes the condensation of water vapor in the air by reducing the temperature inside the evaporator, thereby improving the fog-catching efficiency of the evaporator. The rectangular fog-catching harp 1 is located on the air inlet side of the evaporator and is composed of a rectangular metal frame 2 and equally spaced stainless steel filaments 3. The rectangular fog-catching harp 1 can also be arranged at intervals along the U-shaped opening end to the closed end direction of the U-shaped coolant conduit 4, and the distance from the adjacent coolant conduit 4 is 5-15 mm. The rectangular metal frame 2 is made of aluminum alloy, its thermal conductivity is greater than 150 W / (m·K), and its tensile strength is between 100-200 MPa, ensuring the mechanical strength and heat conduction performance of the rectangular metal frame 2 in a high-temperature and high-humidity environment. The diameter of the stainless steel filaments 3 is 250 μm, and the spacing range is 0.5-3 mm. The specific spacing is dynamically adjusted according to the length of the rectangular metal frame 2. When the length L of the rectangular metal frame 2 exceeds 1 m, the spacing S is calculated according to the formula S = 0.5 + 0.002L to ensure that the stainless steel filaments 3 do not contact each other due to vibration or thermal expansion and contraction.

[0021] During the manufacturing process, the rectangular metal frame 2 is pre-treated first. As Figure 4 shown, this step includes surface cleaning and anti-corrosion treatment of the rectangular metal frame 2. Electrochemical polishing technology is used to remove the oxide layer on the surface of the rectangular metal frame 2, and then a nano-scale hydrophobic coating is sprayed to enhance its anti-corrosion performance. The coating thickness is controlled within 5 - 20 μm to ensure that the rectangular metal frame 2 has excellent corrosion resistance during long-term use. The key to this step lies in selecting appropriate spraying parameters, such as spraying pressure, coating curing temperature, and time, to ensure that the coating is evenly and firmly attached to the surface of the rectangular metal frame 2.

[0022] Meanwhile, it should be noted that the stainless steel wire 3 itself has good anti-corrosion performance and can capture fog droplets well even without hydrophobic treatment. In practical applications, whether to hydrophobize the stainless steel wire 3 can be flexibly selected according to specific requirements and the usage environment. If the humidity in the environment is extremely high and the problem of water droplet accumulation is prominent, the hydrophobized stainless steel wire 3 can play a better role; if the environment has relatively low requirements for fog capture efficiency and cost control is more emphasized, the stainless steel wire 3 without hydrophobic treatment, due to its good fog capture ability and low treatment cost, is also a feasible option.

[0023] After the pre-treatment of the rectangular metal frame 2 is completed, the stainless steel wire arrangement step is entered. As Figure 5 shown, the stainless steel wire 3 with a diameter of 250 μm is fixed on the rectangular metal frame 2 at equal intervals. The fixing process requires the use of special fixtures to ensure that the position of each stainless steel wire 3 is accurate. To prevent the stainless steel wire 3 from coming into contact due to vibration or thermal expansion and contraction during actual use, it is also necessary to measure the vibration frequency of the rectangular metal frame 2 with different lengths during actual use and record the corresponding data. After analyzing the relationship between the vibration frequency and the spacing of the stainless steel wire 3, the spacing S of the stainless steel wire 3 is adjusted based on the measured vibration frequency. If the vibration frequency is F and F > Fmax, then the spacing S of the stainless steel wire 3 is set to S1; if F < Fmin, then the spacing S of the stainless steel wire 3 is set to S2. Here, S represents the spacing of the stainless steel wire 3, F represents the vibration frequency, and Fmax and Fmin respectively represent the preset maximum and minimum vibration frequency limits. Through this dynamic adjustment mechanism, the stainless steel wire 3 can maintain a stable state under various working conditions and avoid mutual interference.

[0024] Next, the fog-catching harp is assembled. As Figure 6As shown in the figure, multiple rectangular metal frames 2 are arranged in parallel along the air flow direction. The distance D between adjacent rectangular metal frames 2 is adjusted according to the environmental humidity H and air flow velocity V, satisfying the formula D = 10H / V. The number N of rectangular metal frames 2 is calculated according to the formula N = H / 10 + V / 5 to meet the fog-catching requirements under different humidity and flow velocity conditions. In actual operation, the number and arrangement of rectangular metal frames 2 can be adjusted flexibly to adapt to different working environments. For example, under high humidity and low flow velocity conditions, the number of rectangular metal frames 2 is increased to improve the fog-catching efficiency; while under low humidity and high flow velocity conditions, the number of rectangular metal frames 2 is reduced to reduce air resistance.

[0025] After the fog-catching harp is assembled, a water guiding structure is designed to solve the problem of condensate accumulation. As Figure 2 shown in the figure, a micro water guide groove is installed at the bottom of each stainless steel filament 3. The width of the water guide groove is 0.5 - 1 mm, and the depth is 0.3 - 0.8 mm. The water guide groove quickly conducts the captured water vapor through capillary action, avoiding the accumulation of water droplets and affecting the fog-catching efficiency. In addition, the inner wall of the water guide groove is coated with a hydrophilic nano-coating with a thickness of 1 - 5 μm to enhance the fluidity of water droplets and reduce residues. In actual applications, the selection of the hydrophilic nano-coating needs to consider its surface energy and wettability to ensure that water droplets can quickly drain along the water guide groove.

[0026] To further optimize the fog-catching effect, an auxiliary cooling device is introduced. As Figure 1 shown in the figure, a semiconductor refrigeration sheet is set around the fog-catching harp, and the surface temperature of the harp is reduced below the dew point by using the refrigeration sheet. The working current I of the refrigeration sheet satisfies the formula I = P / (Uη), where P is the refrigeration power, U is the voltage, and η is the refrigeration efficiency. By precisely controlling the working current of the refrigeration sheet, it is ensured that the surface temperature of the harp is always in the best condensation state. In actual operation, the working parameters of the refrigeration sheet can be adjusted in real time according to the environmental temperature and humidity to achieve efficient water vapor condensation.

[0027] Finally, overall testing and calibration are carried out. As Figure 7 shown in the figure, after assembly, the fog-catching harp is subjected to a simulated environment test, and the fog-catching efficiency under different humidity and flow velocity conditions is recorded. During the test process, two indicators, namely the fog-catching efficiency and the water guiding time, are focused on. For products with a fog-catching efficiency lower than 85% or a water guiding time exceeding 10 seconds, they need to be removed and the distance between the stainless steel filaments 3 and the size of the water guide groove are readjusted. Through repeated testing and calibration, it is ensured that the fog-catching harp can achieve the best performance under various working conditions.

[0028] In practical application scenarios, the present invention can be widely applied to the fields of air treatment and water resource recovery. For example, in industrial workshops, the evaporator can effectively intercept water vapor in the air and convert it into available water resources, thereby reducing energy consumption and improving resource utilization efficiency. In addition, the present invention can also be used in fields such as agricultural irrigation and air purification, with significant technical advantages and broad application prospects.

[0029] In summary, the present invention solves the problem of water droplet accumulation through the dynamic spacing adjustment of the stainless steel filaments 3 and the design of the water guide grooves, improving the fog capture efficiency. The introduction of the auxiliary cooling device ensures the rapid condensation of water vapor, further enhancing the fog capture effect. The anti-corrosion treatment and hydrophobic coating of the rectangular metal frame 2 significantly extend the service life of the device. The dynamic parameter adjustment and test calibration in the manufacturing method ensure the optimal performance of the device under different environmental conditions. The implementation of these technical solutions endows the present invention with outstanding technical advantages and practical value in the fields of air treatment and evaporators.

[0030] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An evaporator structure combined with a rectangular fog-catching harp, characterized in that, Comprising: A coolant conduit (4), which is arranged in a U shape and located inside the evaporator, for transferring cold energy to achieve a heat exchange function; A rectangular mist-catching harp (1), which is located on one side of the air inlet of the evaporator and is composed of a rectangular metal frame (2) and stainless steel filaments (3) arranged at equal intervals.

2. The evaporator structure combined with a rectangular fog-catching harp according to claim 1, characterized in that, The diameter of the stainless steel filaments (3) is about 250 μm, and the spacing is between 0.5 - 3 mm; The rectangular mist-catching harp (1) can also be arranged at intervals along the direction from the U-shaped open end to the closed end of the U-shaped coolant conduit (4), and the spacing from the adjacent coolant conduit (4) is 5 - 15 mm.

3. A manufacturing method of a rectangular fog-catching harp structure, characterized in that, Including the following steps: Step 1: Pretreatment of the rectangular metal frame (2), cleaning and anti-corrosion treatment of the rectangular metal frame (2), removing the surface oxide layer by electrochemical polishing technology, and enhancing its anti-corrosion performance by spraying a nano-scale hydrophobic coating. The coating thickness is controlled within 5 - 20 μm to extend the service life of the metal frame; Step 2: Arrangement of the stainless steel filaments (3), fixing the stainless steel filaments (3) with a diameter of 250 μm on the rectangular metal frame (2) at equal intervals, and the spacing range is 0.5 - 3 mm. The spacing is dynamically adjusted according to the length of the rectangular metal frame (2). When the length L exceeds 1 m, the spacing S is calculated according to the formula S = 0.5 + 0.002L to ensure that the stainless steel filaments (3) do not contact each other due to vibration or thermal expansion and contraction; Step 3: Assembly of the mist-catching harp, arranging multiple rectangular metal frames (2) in parallel according to the air flow direction. The distance D between adjacent rectangular metal frames (2) is adjusted according to the environmental humidity H and air flow velocity V, satisfying the formula D = 10H / V to ensure that the mist-catching harp can efficiently intercept water vapor; Step 4: Design of the water guiding structure, installing a micro water guiding groove at the bottom of each stainless steel filament (3). The width of the water guiding groove is 0.5 - 1 mm, and the depth is 0.3 - 0.8 mm. The captured water vapor is quickly led out through capillary action to avoid the accumulation of water droplets affecting the mist-catching efficiency; Step 5: Optimization of the temperature field, setting an auxiliary cooling device around the mist-catching harp, using a thermoelectric cooler to reduce the surface temperature of the harp below the dew point. The working current I of the cooler satisfies the formula I = P / (Uη), where P is the refrigeration power, U is the voltage, and η is the refrigeration efficiency, to ensure the rapid condensation of water vapor; Step 6: Overall testing and calibration, conducting a simulated environment test on the mist-catching harp after assembly, recording the mist-catching efficiency under different humidity and flow velocity conditions, and fine-tuning the spacing of the stainless steel filaments (2) and the size of the water guiding groove according to the test results to ensure the best performance.

4. The manufacturing method of a rectangular fog-catching harp structure according to claim 3, characterized in that, The material of the rectangular metal frame (2) in Step 1 is aluminum alloy, and the thermal conductivity of the aluminum alloy is greater than 150 W / (m・K), and the tensile strength is between 100 - 200 MPa.

5. The manufacturing method of a rectangular fog-catching harp structure according to claim 3, characterized in that, By adjusting the number N and arrangement method of the rectangular metal frames (2), the mist-catching requirements under different humidity and flow velocity conditions are met. The specific number N is calculated according to the formula N = H / 10 + V / 5.

6. The manufacturing method of a rectangular fog-catching harp structure according to claim 3, characterized in that, The inner wall of the water guiding groove is coated with a hydrophilic nano-coating, and the coating thickness is 1 - 5 μm to enhance the fluidity of water droplets and reduce residues.

7. The manufacturing method of a rectangular fog-catching harp structure according to claim 3, characterized in that, During the test in Step Six, it also includes the durability assessment of the fog-catching harp, and products with a fog-catching efficiency lower than 85% or a water conduction time exceeding 10 seconds are excluded.

8. The manufacturing method of a rectangular fog-catching harp structure according to claim 3, characterized in that, The dynamic spacing adjustment of the stainless steel filaments (3) further includes: Measuring the vibration frequencies of rectangular metal frames (2) of different lengths during actual use and recording the corresponding data; Analyzing the relationship between the vibration frequency and the spacing of the stainless steel filaments (3); Adjusting the spacing S of the stainless steel filaments (3) based on the measured vibration frequency; If the vibration frequency is F and when F > Fmax, setting the spacing S of the stainless steel filaments (3) = S1; when F < Fmin, setting the spacing S of the stainless steel filaments (3) = S2, where S represents the spacing of the stainless steel filaments (3), F represents the vibration frequency, and Fmax and Fmin respectively represent the preset maximum and minimum vibration frequency limits.

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