Constant-temperature and constant-humidity high-voltage electrostatic spinning system

Abstract

The utility model provides a constant-temperature and constant-humidity high-voltage electrostatic spinning system which comprises a spinning cavity, a spinning assembly, a constant-temperature and constant-humidity machine, a detection assembly and a central control assembly, air inlets are symmetrically formed in the spinning cavity, and an air outlet coinciding with the symmetric center of the air inlets is formed in the top of the spinning cavity. The spinning assembly is arranged in the spinning cavity and comprises a first polarity collecting assembly and a second polarity spraying assembly, the first polarity collecting assembly and the second polarity spraying assembly are each provided with a vertically-upward flow channel, the height of the air inlet is lower than that of the first polarity collecting assembly or the second polarity spraying assembly, and the constant temperature and humidity machine is connected with the air inlet. The detection assembly collects the temperature, humidity and air volume of the air inlet and the air outlet, and the central control assembly is connected with the constant temperature and humidity machine and the detection assembly. Feedback control is carried out by optimizing the structure and the airflow direction of the spinning cavity and monitoring the temperature, humidity and air volume, so that the air supply speed, the temperature and the humidity at all positions on the horizontal section in the spinning cavity are relatively uniform in distribution.

Description

Technical Field

[0001] The utility model relates to the technical field of high-voltage electrospinning, and particularly relates to a constant-temperature and constant-humidity type high-voltage electrospinning system. Background Art

[0002] The high-voltage nano-electrospinning technology is an advanced technology for manufacturing nanofibers. It involves stretching polymer solutions or melts into nanofibers under the action of a high-voltage electric field. This technology can produce fibers with diameters in the range of nanometers to micrometers, and has unique physical and chemical properties, such as a high specific surface area, controllable porosity, and excellent mechanical strength.

[0003] The high-voltage nano-electrospinning technology usually needs to be carried out in a constant-temperature and constant-humidity environment, because temperature and humidity have a significant impact on the fiber morphology, size, and function during the electrospinning process. For example, too low a temperature may lead to poor solution fluidity, while too high a temperature may accelerate solvent evaporation, affecting the spinning effect; and too high a relative humidity may also affect the drying and solidification processes of the fibers.

[0004] However, the existing technical solutions directly introduce constant-temperature and constant-humidity airflows into the spinning cavity through air ducts, without considering the structural layout and feedback control inside the spinning cavity, resulting in disordered airflows inside the spinning cavity, and uneven air supply speeds and air supply temperature and humidity distributions at various locations on the horizontal cross-section of the spinning cavity, ultimately affecting the quality of the generated spun fibers. Summary of the Utility Model

[0005] Based on this, the purpose of the utility model is to provide a constant-temperature and constant-humidity type high-voltage electrospinning system, aiming to make the air supply speeds and air supply temperature and humidity distributions at various locations on the horizontal cross-section inside the spinning cavity relatively uniform by reasonably arranging the internal structure of the spinning cavity, optimizing the air flow direction inside the spinning cavity, and monitoring the temperature, humidity, and air volume inside the spinning cavity for feedback control.

[0006] The utility model provides a constant-temperature and constant-humidity type high-voltage electrospinning system, which includes a spinning cavity, a spinning component, a constant-temperature and constant-humidity machine, a detection component, and a central control component. Air inlets are symmetrically arranged on the opposite side walls of the spinning cavity, an air outlet is provided at the top of the spinning cavity, the center of the air outlet coincides with the symmetry center of the air inlets, the spinning component is arranged inside the spinning cavity, the spinning component includes a first-polarity collection component and a second-polarity injection component, vertical upward flow channels are provided on both the first-polarity collection component and the second-polarity injection component, the height of the air inlets is lower than the height of the first-polarity collection component or the second-polarity injection component, the constant-temperature and constant-humidity machine is connected to the air inlets, the detection component is used to collect the temperature, humidity, and air volume of the air inlets and the air outlet, and the central control component is connected to the constant-temperature and constant-humidity machine and the detection component.

[0007] The beneficial effects of the present utility model at least include: by providing symmetric air inlets and air outlets on the spinning cavity, and vertical upward flow channels on the first polar collecting component and the second polar jetting component, the air flow in the spinning cavity can flow evenly upward. At the same time, a detection component, a constant temperature and humidity machine, and a central control component are provided. The central control component can adjust the working parameters of the constant temperature and humidity machine according to the data collected by the detection component, so that the air supply speed and the distribution of air supply temperature and humidity at each place on the horizontal cross-section in the spinning cavity are relatively uniform.

[0008] In addition, according to the above constant temperature and humidity type high-voltage electrostatic spinning system of the present utility model, the following additional technical features may also be provided:

[0009] Further, the first polar collecting component includes a support platform, and the support platform is provided with first air holes uniformly distributed in an array.

[0010] Further, the first polar collecting component is located above the second polar jetting component. The first polar collecting component includes a moving roll and a conductive plate. The moving roll is mounted on the opposite side walls of the spinning cavity and is used to drive the spinning substrate to move. The conductive plate is provided on the spinning cavity and on the side of the moving roll away from the second polar jetting component. The conductive plate is provided with second air holes uniformly distributed in an array.

[0011] Further, an isolation cavity is provided at the top of the spinning cavity. The conductive plate is provided in the isolation cavity, and the top of the isolation cavity is provided with third air holes uniformly distributed in an array.

[0012] Further, a gap is provided between the second polar jetting component and the side wall of the spinning cavity.

[0013] Further, the shape of the air inlet is a horn shape with the large end facing the spinning cavity.

[0014] Further, a part of the air inlet extends into the spinning cavity.

[0015] Further, an exhaust hood is provided at the air outlet. The shape of the exhaust hood is a horn shape with the large end facing the third air hole.

[0016] Further, the constant temperature and humidity type high-voltage electrostatic spinning system further includes an exhaust fan connected to the central control component, and the exhaust fan is connected to the exhaust hood.

[0017] Further, the constant temperature and humidity type high-voltage electrostatic spinning system further includes a differential pressure transmitter provided on the spinning cavity, and the differential pressure transmitter is connected to the central control component. Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of the first perspective of the embodiment of the present utility model;

[0019] Figure 2 isFigure 1 Partial enlarged view at A in the middle;

[0020] Figure 3 Structural schematic diagram of the second perspective of the embodiment of the present utility model;

[0021] Figure 4 Three-dimensional sectional view of the embodiment of the present utility model;

[0022] Description of main component symbols:

[0023] Spinning cavity 100, air inlet 110, air outlet 120, exhaust hood 121, isolation cavity 130, third air hole 131, spinning assembly 200, first polar collection assembly 210, moving roll 211, conductive plate 212, second air hole 2121, second polar injection assembly 220, support platform 221, first air hole 2211.

[0024] The following specific embodiments will further illustrate the present utility model in conjunction with the above-mentioned drawings. Specific embodiments

[0025] For the convenience of understanding the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present utility model are given in the drawings. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present utility model more thorough and comprehensive.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs. The terms used in the specification of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0027] Refer to Figures 1 to 4, a constant temperature and humidity type high-voltage electrostatic spinning system provided by the present utility model, includes a spinning cavity 100, a spinning assembly 200, a constant temperature and humidity machine, a detection assembly, and a central control assembly. Among them, the constant temperature and humidity machine, the detection assembly, and the central control assembly are not shown in the drawings, and the front and rear side walls of the spinning cavity 100 shown in the drawings are transparent. Air inlets 110 are symmetrically arranged on the opposite side walls of the spinning cavity 100. Optionally, air inlets 110 can be symmetrically arranged on the left and right side walls of the spinning cavity 100, or air inlets 110 can be symmetrically arranged on the front and rear side walls of the spinning cavity 100, or air inlets 110 can be symmetrically arranged on the left, right, front, and rear side walls of the spinning cavity 100, and it can be understood that the number of air inlets 110 can be set to multiple. The air inlets 110 are connected to the constant temperature and humidity machine. During use, the constant temperature and humidity machine sends air flow with a certain flow rate, temperature, and humidity into the interior of the spinning cavity 100 through the air inlets 110. An air outlet 120 is provided at the top of the spinning cavity 100, and the center of the air outlet 120 coincides with the symmetric center of the air inlets 110. The spinning assembly 200 is arranged in the spinning cavity 100. Specifically, the spinning assembly 200 includes a first polarity collection assembly 210 and a second polarity injection assembly 220, and both the first polarity collection assembly 210 and the second polarity injection assembly 220 are provided with vertically upward flow channels. In addition, in order to prevent the position of the first polarity collection assembly 210 or the second polarity injection assembly 220 from blocking the air flow flowing in from the air inlets 110, the height of the air inlets 110 is set to be lower than the height of the first polarity collection assembly 210 or the second polarity injection assembly 220. It should be noted that the aforementioned second polarity injection assembly 220 is mainly used to provide a charged solution for spinning and a positive or negative electrode capable of generating high voltage, and the first polarity collection assembly 210 is mainly used to provide a high-voltage electrode with a polarity opposite to that of the second polarity injection assembly 220 and collect the ejected nanofiber filaments. The detection assembly is used to collect the temperature, humidity, and air volume of the air inlets 110 and the air outlet 120, and the central control assembly is connected to the constant temperature and humidity machine and the detection assembly, so that the parameters of the constant temperature and humidity machine can be adjusted according to the data obtained by the detection assembly to ensure that the air flow in the spinning cavity 100 meets the requirements of constant temperature and humidity.

[0028] In this embodiment, through the symmetrical arrangement of the air inlets 110 and the air outlet 120, the air flow sent in from the periphery of the spinning cavity 100 flows vertically upward evenly, and converges to the air outlet 120 through the vertically upward flow channels provided on the first polarity collection assembly 210 and the second polarity injection assembly 220, so that the air supply speed and the air supply temperature and humidity distribution at each place on the horizontal cross-section inside the spinning cavity 100 can be guaranteed to be relatively uniform.

[0029] In some alternative embodiments, such as Figure 2As shown, the second-polarity jet assembly 220 includes a support platform 221, which mainly provides a supporting function. Optionally, the support platform 221 can also be set to be vertically adjustable, so that the distance between the high-voltage positive and negative electrodes and the spinning distance can be adjusted. To ensure the uniform flow of air, a first air hole 2211 is provided on the support platform 221 in a uniformly arrayed distribution.

[0030] In some alternative embodiments, as Figure 3 , Figure 4 shown, the first-polarity collection assembly 210 is located above the second-polarity jet assembly 220. Specifically, the first-polarity collection assembly 210 includes a moving roll 211 and a conductive plate 212. The moving roll 211 is mounted on the opposite side walls of the spinning cavity 100, and the moving roll 211 is located above the support platform 221. During use, the moving roll 211 is used to drive the movement of the spinning substrate, and the generated nanofibers adhere to the spinning substrate and move together with the spinning substrate. The conductive plate 212 is provided on the spinning cavity 100 and is located on the side of the moving roll 211 away from the second-polarity jet assembly 220, that is, the conductive plate 212 is located above the moving roll 211. The conductive plate 212 is used to connect a certain polarity electrode of the high-voltage power supply. To ensure the uniform flow of air, a second air hole 2121 is provided on the conductive plate 212 in a uniformly arrayed distribution.

[0031] To meet the insulation and safety requirements, in some alternative embodiments, as Figure 4 shown, an isolation cavity 130 is provided at the top of the spinning cavity 100. The side wall of the isolation cavity 130 is made of an insulating material, and the conductive plate 212 is provided in the isolation cavity 130. In addition, to ensure the uniform flow of air, a third air hole 131 is provided on the top side wall of the isolation cavity 130 in a uniformly arrayed distribution.

[0032] In some alternative embodiments, as Figure 4 shown, a gap is provided between the second-polarity jet assembly 220 and the side wall of the spinning cavity 100, so that the air flow sent from the air inlet 110 can flow upward from this gap, avoiding the influence of the non-uniform distribution of temperature and humidity caused by the non-flow of the air flow in the area close to the side wall of the spinning cavity 100.

[0033] To guide the air flow to enter the interior of the spinning cavity 100 more uniformly and reduce eddy currents and turbulence, in some alternative embodiments, as Figure 1 shown, the shape of the air inlet 110 is trumpet-shaped and the large end faces the spinning cavity 100.

[0034] To guide the air flow to converge more uniformly and be discharged efficiently, in some alternative embodiments, as Figure 1As shown, an exhaust hood 121 is provided at the air outlet 120. The exhaust hood 121 is in the shape of a horn with the large end facing the third air hole 131.

[0035] In some alternative embodiments, the constant temperature and humidity type high-voltage electrospinning system further includes an exhaust fan connected to the central control component. The exhaust fan is connected to the exhaust hood 121. By adjusting the rotation speed of the exhaust fan, the exhaust efficiency can be controlled, and the air flow rate, air temperature and humidity inside the spinning cavity 100 can be changed.

[0036] In some alternative embodiments, the constant temperature and humidity type high-voltage electrospinning system further includes a differential pressure transmitter provided on the spinning cavity 100. The differential pressure transmitter is connected to the central control component. Since the air pressure inside the spinning cavity 100 is related to the exhaust air volume at the air outlet 120 and the air supply volume at the air inlet 110, during operation, in order to ensure that the air pressure inside the spinning cavity 100 is in a slightly negative pressure of -5 Pa to -10 Pa, the central control component can adjust the working parameters of the exhaust fan and the constant temperature and humidity machine according to the differential pressure between the inside and outside of the spinning cavity 100 collected by the differential pressure transmitter, so that the air pressure inside the spinning cavity 100 meets the working requirements.

[0037] In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0038] The above-described embodiments only represent several implementation manners of the present invention. The descriptions are relatively specific and detailed, but should not be construed as limiting the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A constant temperature and humidity type high voltage electrospinning system, characterized in that, The constant temperature and humidity type high-voltage electrospinning system includes: A spinning cavity, on the opposite side walls of which air inlets are symmetrically arranged, and an air outlet is provided at the top of the spinning cavity, and the center of the air outlet coincides with the symmetry center of the air inlets; A spinning assembly, disposed in the spinning cavity, the spinning assembly includes a first polarity collecting assembly and a second polarity ejecting assembly, and both the first polarity collecting assembly and the second polarity ejecting assembly are provided with vertically upward flow channels, and the height of the air inlets is lower than the height of the first polarity collecting assembly or the second polarity ejecting assembly; A constant temperature and humidity machine, connected to the air inlets; A detection assembly, used for collecting the temperature, humidity and air volume of the air inlets and the air outlet; A central control assembly, connected to the constant temperature and humidity machine and the detection assembly.

2. The constant temperature and humidity type high voltage electrospinning system according to claim 1, characterized in that, The first polarity collecting assembly includes a support platform, and the support platform is provided with first air holes uniformly arranged in an array.

3. The constant temperature and humidity type high-voltage electrospinning system according to claim 1, characterized in that, The first polarity collecting assembly is located above the second polarity ejecting assembly. The first polarity collecting assembly includes a moving roll and a conductive plate. The moving roll is mounted on the opposite side walls of the spinning cavity and is used to drive the spinning substrate to move. The conductive plate is disposed on the spinning cavity and on the side of the moving roll away from the second polarity ejecting assembly, and the conductive plate is provided with second air holes uniformly arranged in an array.

4. The constant temperature and humidity type high-voltage electrospinning system according to claim 3, characterized in that, An isolation cavity is provided at the top of the spinning cavity, the conductive plate is disposed in the isolation cavity, and the top of the isolation cavity is provided with third air holes uniformly arranged in an array.

5. The constant temperature and humidity type high voltage electrospinning system according to any one of claims 1 to 4, characterized in that, A gap is provided between the second polarity ejecting assembly and the side wall of the spinning cavity.

6. The constant temperature and humidity type high-voltage electrospinning system according to claim 1, wherein, The shape of the air inlets is trumpet-shaped and the large end faces the spinning cavity.

7. The constant temperature and humidity type high voltage electrospinning system according to claim 6, characterized in that Part of the air inlets extends into the spinning cavity.

8. The constant temperature and humidity type high voltage electrospinning system according to claim 4, characterized in that, An exhaust hood is provided at the air outlet, and the shape of the exhaust hood is trumpet-shaped and the large end faces the third air holes.

9. The constant temperature and humidity type high voltage electrospinning system according to claim 8, characterized in that, The constant temperature and humidity type high-voltage electrospinning system further includes an exhaust fan connected to the central control assembly, and the exhaust fan is connected to the exhaust hood.

10. The constant temperature and humidity type high voltage electrospinning system according to claim 9, characterized in that, The constant temperature and humidity type high-voltage electrospinning system further includes a differential pressure transmitter disposed on the spinning cavity, and the differential pressure transmitter is connected to the central control assembly.

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