Microflow control device

Abstract

The utility model discloses a microflow control device and relates to the technical field of fluid control. The microflow control device is arranged in a heating furnace and comprises a flow channel, a heating element, a temperature detection element and a control system, and the flow channel is arranged in the heating furnace and located between an air outlet and an air inlet of the heating furnace; the heating element is arranged in the runner and is used for heating the runner; the temperature detection element is arranged in the flow channel and is used for detecting the temperature in the flow channel; the control system is electrically connected with the temperature detection element and the heating element. According to the technical scheme, the temperature and flowing of airflow in the heating furnace can be accurately controlled, and then the heating uniformity of the heating furnace is improved.

Description

Technical Field

[0001] This utility model relates to the field of fluid control technology, and in particular to a microfluidic control device. Background Technology

[0002] Heating furnaces are important pieces of equipment widely used in various industrial fields, mainly for heating airflow to meet production process requirements. Traditional heating furnaces generally use externally fixed heating elements. Although these elements can effectively heat the airflow, the heating effect is often uneven due to the complex airflow within the furnace. Utility Model Content

[0003] The main purpose of this invention is to propose a microfluidic control device, which aims to precisely control the temperature and flow of air in a heating furnace to improve the heating uniformity of the furnace.

[0004] To achieve the above objectives, the microfluidic control device proposed in this utility model includes:

[0005] The flow channel is located inside the heating furnace and between the air outlet and the air inlet of the heating furnace;

[0006] A heating element is disposed within the flow channel, and the heating element is used to heat the flow channel;

[0007] A temperature sensing element is disposed within the flow channel, the temperature sensing element being used to detect the temperature within the flow channel; and...

[0008] The control system is electrically connected to the temperature sensing element and the heating element.

[0009] In one embodiment, multiple temperature sensing elements are provided, and the temperature sensing elements are evenly distributed within the flow channel.

[0010] In one embodiment, a plurality of heating elements are provided, and the plurality of heating elements are staggered and distributed within the flow channel.

[0011] In one embodiment, the heating element and the temperature sensing element are misaligned.

[0012] In one embodiment, the heating element is configured as a heating plate.

[0013] In one embodiment, the flow channel is configured as a streamlined structure.

[0014] In one embodiment, multiple flow channels are provided, and the multiple flow channels are arranged in parallel between the air outlet and the air inlet and are all connected to the air outlet and the air inlet.

[0015] In one embodiment, the width of the flow channel near the air inlet axis is greater than the width of the flow channel away from the air inlet axis.

[0016] In one embodiment, the length of the flow channel near the air inlet axis is less than the length of the flow channel away from the air inlet axis.

[0017] In one embodiment, the microfluidic control device further includes:

[0018] A first guide vane is disposed between the flow channel and the air inlet; and,

[0019] The second guide plate is disposed between the flow channel and the air outlet.

[0020] The technical solution of this utility model involves installing a microfluidic control device inside a heating furnace. The microfluidic control device includes a flow channel, a heating element, a temperature detection element, and a control system. The flow channel is located inside the heating furnace, between the air outlet and the air inlet. The heating element is located within the flow channel for heating the flow channel. The temperature detection element is located within the flow channel for detecting the temperature within the flow channel. The control system is electrically connected to the temperature detection element and the heating element. Compared to existing heating furnaces, this utility model provides a microfluidic control device within the heating furnace. The flow channel guides the airflow, preventing eddies. Furthermore, the flow channel contains both a heating element and a temperature detection element. The control system can control the heating element based on feedback from the temperature detection element, achieving precise control of the airflow temperature and thus improving the heating uniformity of the heating furnace. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of an embodiment of the heating furnace involved in this utility model;

[0023] Figure 2 A schematic diagram of an embodiment of the microfluidic control device provided by this utility model;

[0024] Figure 3 for Figure 2 A cross-sectional view of one embodiment.

[0025] Explanation of icon numbers:

[0026] 100. Heating furnace; 110. Shell; 120. Air inlet; 130. Air outlet; 140. Baffle plate; 150. Burner;

[0027] 210, Flow channel; 220, Temperature detection element; 230, First guide plate; 240, Second guide plate; 250, Heating element.

[0028] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0030] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0031] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0032] Heating furnaces are important pieces of equipment widely used in various industrial fields, mainly for heating airflow to meet production process requirements. Traditional heating furnaces generally use externally fixed heating elements. Although these elements can effectively heat the airflow, the heating effect is often uneven due to the complex airflow within the furnace.

[0033] This invention proposes a microfluidic control device to precisely control the temperature and flow of air in a heating furnace, thereby improving the heating uniformity of the furnace.

[0034] Please refer to 1 to Figure 3 In one embodiment, the microfluidic control device is disposed in the heating furnace 100 and includes a flow channel 210, a heating element 250, a temperature detection element 220 and a control system.

[0035] The flow channel 210 is disposed inside the heating furnace 100 and located between the air outlet 130 and the air inlet 120 of the heating furnace 100. In one embodiment, the heating furnace 100 includes a shell 110 with a receiving cavity, and an air inlet 120 and an air outlet 130 communicating with the receiving cavity. The air inlet 120 and the air outlet 130 are disposed on the side wall of the shell 110, and the air inlet 120 and the air outlet 130 are arranged opposite to each other and located on the same axis. The flow channel 210 is disposed in the receiving cavity, with one end of the flow channel 210 facing the air inlet 120 and the other end of the flow channel 210 facing the air outlet 130 to connect the air inlet 120 and the air outlet 130. In one embodiment, at least two partitions 140 are provided in the receiving cavity, one side of the partition 140 is fixed to the inner wall of the shell 110, and the flow channel 210 is formed by a gap between two adjacent partitions 140. Of course, in other embodiments, the partition 140 and the housing 110 may also be integrally formed, and no limitation is made here. The material of the partition 140 can be a high-temperature resistant material such as an alloy, carbon fiber reinforced composite material, ceramic, or polycarbonate; no specific limitation is made on the material of the partition 140. In this way, the flow channel 210 can guide the airflow from the air inlet 120 to the air outlet 130, making the airflow distribution within the heating furnace 100 more uniform, avoiding eddies, and improving the heat utilization efficiency within the heating furnace 100.

[0036] A heating element 250 is disposed within the flow channel 210 for heating the flow channel 210. In one embodiment, the heating element 250 is configured as a heating plate, which is disposed on the partition 140 to conduct heat to the passing airflow. Further, in one embodiment, the partition 140 is provided with a mounting groove, the heating plate is embedded in the mounting groove, and the surface of the heating plate is flush with the surface of the partition 140 to reduce the flow resistance when the airflow passes through. Of course, in other embodiments, the heating element 250 may also be configured as a heating film or a heating tube, etc., without specific limitations. In one embodiment, the heating furnace 100 also includes a burner 150, which is disposed parallel to the air inlet 120 on the same side wall of the housing 110, and the burner 150 and the heating element 250 can heat the airflow simultaneously. Of course, in other embodiments, the heating furnace 100 may heat the airflow only through the heating element 250, without limitations.

[0037] A temperature sensing element 220 is disposed within the flow channel 210 to detect the temperature within the flow channel 210. The control system is electrically connected to the temperature sensing element 220 and the heating element 250 to control the heating element 250 based on feedback from the temperature sensing element 220. In one embodiment, the temperature sensing element 220 is disposed on the partition 140 to facilitate the detection of the real-time temperature within the flow channel 210. In another embodiment, the temperature sensing element 220 and the heating element 250 are offset to avoid affecting the accuracy of the detection. Further, in one embodiment, the control system has a preset temperature range. The preset temperature range can be flexibly set according to actual conditions and is not limited here. Thus, the temperature sensing element 220 can feed back the detected real-time temperature to the control system, which then adjusts the heating efficiency and operating state of the heating element 250 based on the real-time temperature to ensure that the temperature of the airflow within the flow channel 210 remains within the preset temperature range, thereby achieving uniform heating of the airflow.

[0038] The technical solution of this utility model involves setting a microfluidic control device inside a heating furnace 100. The microfluidic control device includes a flow channel 210, a heating element 250, a temperature detection element 220, and a control system. The flow channel 210 is located inside the heating furnace 100 and between the air outlet 130 and the air inlet 120 of the heating furnace 100. The heating element 250 is located inside the flow channel 210 and is used to heat the flow channel 210. The temperature detection element 220 is located inside the flow channel 210 and is used to detect the temperature inside the flow channel 210. The control system is electrically connected to the temperature detection element 220 and the heating element 250. Compared with the existing heating furnace 100, the technical solution of this utility model provides a microfluidic control device installed in the heating furnace 100. The flow channel 210 can guide the flow of air and avoid eddies. The flow channel 210 is equipped with a heating element 250 and a temperature detection element 220. The control system can control the heating element 250 according to the feedback of the temperature detection element 220 to achieve precise control of the airflow temperature, thereby improving the heating uniformity of the heating furnace 100.

[0039] Please see Figure 2 In one embodiment, multiple temperature sensing elements 220 are provided, and the temperature sensing elements 220 are evenly distributed in the flow channel 210.

[0040] In one embodiment, three temperature sensing elements 220 are provided, respectively located at the inlet, outlet, and middle position of the flow channel 210, to facilitate accurate detection of the temperature at different locations within the flow channel 210. In another embodiment, the temperature sensing elements 220 are also located on the inner wall of the housing 110 and opposite to the flow channel 210, so that the temperature sensing elements 220 are arranged around the flow channel 210. The specific location of the temperature sensing elements 220 is not limited here. Of course, in other embodiments, only one temperature sensing element 220 may be provided, with one temperature sensing device located in the middle position; or multiple temperature sensing elements 220 may be provided, with multiple temperature sensing elements 220 evenly distributed within the flow channel 210. No limitation is made here. The temperature sensing elements 220 may be configured as thermocouples, resistance temperature detectors (RTDs), or temperature sensors, etc., without limitation. Thus, by placing the temperature sensing element 220 at the inlet, outlet, and middle of the flow channel 210, comprehensive detection of the airflow temperature within the flow channel 210 can be achieved. This allows the control system to adjust the working state and heating power of the heating element 250 based on the real-time temperature at different locations within the flow channel 210, thereby improving the control accuracy of the microfluidic control device and ultimately enhancing the heating uniformity of the heating furnace 100.

[0041] Please see Figure 3 Furthermore, in one embodiment, multiple heating elements 250 are provided, and the multiple heating elements 250 are staggered and distributed within the flow channel 210.

[0042] In one embodiment, the control system can individually control each heating element 250. In another embodiment, at least two heating elements 250 are staggered within the flow channel 210, and these at least two heating elements 250 are staggered with the temperature sensing element 220. Specifically, in one embodiment, at least one heating element 250 is disposed between two adjacent temperature sensing elements 220. In another embodiment, at least one heating element 250 is also provided on the inner wall of the housing 110 opposite to the flow channel 210, so that all the heating elements 250 can surround the airflow within the flow channel 210 to fully heat the airflow. Of course, in other embodiments, only one heating element 250 may be provided, and the heating element 250 may be located only at one end or the middle of the flow channel 210 away from the air inlet 120. Here, the specific number of heating elements 250 is not limited.

[0043] The technical solution of this utility model embodiment, by setting multiple heating elements 250, can achieve heating at different positions within the flow channel 210, thereby avoiding uneven heating caused by local overheating. The heating elements 250 are positioned between adjacent temperature detection elements 220, facilitating the control system to adjust the operating status and heating power of nearby heating elements 250 according to the real-time temperature at different positions. This results in a more uniform airflow temperature within the flow channel 210, and the temperature detection elements 220 can determine whether the heating elements 250 are functioning properly, further improving the control accuracy and reliability of the microfluidic control device.

[0044] Please see Figure 2 and Figure 3 In one embodiment, the flow channel 210 is configured as a streamlined structure.

[0045] In one embodiment, the partition 140 has a streamlined cross-sectional shape, and two adjacent partitions 140 form a streamlined flow channel 210. Specifically, in one embodiment, the cross-sectional shape of the partition 140 is configured as a smooth curve. Of course, in other embodiments, the cross-sectional shape of the partition 140 can also be configured as a teardrop shape or a combination of arcs and semi-ellipses, etc., without specific limitations. In one embodiment, the surface of the partition 140 is smoothed to further reduce the friction coefficient of airflow. Thus, by setting the flow channel 210 as a streamlined structure, it can be ensured that the airflow can flow smoothly in the flow channel 210, reducing eddies and turbulence in the flow channel 210, thereby reducing the resistance to airflow, optimizing the airflow path, and improving the flow velocity and uniformity of the airflow in the flow channel 210.

[0046] Please see Figure 2 and Figure 3 In one embodiment, multiple flow channels 210 are provided, and the multiple flow channels 210 are arranged in parallel between the air outlet 130 and the air inlet 120 and are all connected to the air outlet 130 and the air inlet 120.

[0047] In one embodiment, multiple partitions 140 are spaced apart, and two adjacent partitions 140 form a flow channel 210. All flow channels 210 are configured with a streamlined structure, and each flow channel 210 is provided with multiple temperature sensing elements 220 and heating elements 250. The control system can individually control the heating elements 250 in each flow channel 210. In one embodiment, since the airflow rate of the flow channel 210 near the axis of the air inlet 120 is greater than that of the flow channel 210 away from the axis of the air inlet 120, the width of the flow channel 210 near the axis of the air inlet 120 is greater than that of the flow channel 210 away from the axis of the air inlet 120, the airflow rate is balanced. Specifically, in one embodiment, the spacing between adjacent partitions 140 corresponds to the width of one flow channel 210, and the spacing between adjacent partitions 140 gradually decreases in the direction away from the axis of the air inlet 120. Furthermore, in one embodiment, since the airflow velocity near the axis of the inlet 120 is greater than that far from the axis of the inlet 120, the airflow entering from the inlet 120 will more directly enter the flow channel 210 near the axis of the inlet 120. The length of the flow channel 210 near the axis of the inlet 120 is shorter than that far from the axis of the inlet 120, which can reduce the flow friction of the high-velocity airflow and guide the low-velocity airflow into the flow channel 210. In one embodiment, the two ends of the baffle 140 farthest from the axis of the inlet 120, i.e., the longest baffle 140, are connected to the inner wall of the heating furnace 100 shell 110 to avoid airflow accumulating at the corners of the shell 110, which would prevent effective heating. Of course, in other embodiments, baffles can also be directly provided at the corners of the shell 110; this is not a limitation.

[0048] The technical solution of this utility model embodiment optimizes the airflow path and distribution by setting multiple flow channels 210 and limiting the width and length of the flow channels 210 at different positions, enabling the microfluidic control device to adapt to different flow rates and volumes. The control system can individually control the heating element 250 in each flow channel 210, further improving the control accuracy of the microfluidic control device and thus improving heating uniformity.

[0049] Please see Figure 2 and Figure 3 In one embodiment, the microfluidic control device further includes a first guide plate 230 and a second guide plate 240. The first guide plate 230 is disposed between the flow channel 210 and the air inlet 120, and the second guide plate 240 is disposed between the flow channel 210 and the air outlet 130.

[0050] In one embodiment, two first guide vanes 230 and two second guide vanes 240 are provided. The two first guide vanes 230 are positioned opposite each other on the side of the air inlet 120 facing the flow channel 210, and the two second guide vanes 240 are positioned opposite each other on the side of the air outlet 130 facing the flow channel 210. In another embodiment, both the first guide vanes 230 and the second guide vanes 240 are arc-shaped. The two first guide vanes 230 are positioned on both sides of the air inlet 120 to form a trumpet shape, and the two second guide vanes 240 are positioned on both sides of the air outlet 130 to also form a trumpet shape, which can guide the airflow while reducing flow resistance. Of course, in other embodiments, one or more first guide vanes 230 and second guide vanes 240 may be provided. The first guide vanes 230 and the second guide vanes 240 may also be straight, triangular, or airfoil-shaped, etc. Here, the number and shape of the first guide vanes 230 and the second guide vanes 240 are not limited.

[0051] The technical solution of this utility model embodiment, by setting a first guide plate 230 and a second guide plate 240, guides the airflow into or out of the flow channel 210, avoids the airflow from accumulating at the air inlet 120 or the air outlet 130 and causing turbulence, and improves the reliability of the microfluidic control device.

[0052] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A microfluidic control device, disposed within a heating furnace, characterized in that, include: The flow channel is located inside the heating furnace and between the air outlet and the air inlet of the heating furnace; A heating element is disposed within the flow channel, and the heating element is used to heat the flow channel; A temperature sensing element is disposed within the flow channel, and the temperature sensing element is used to detect the temperature within the flow channel; as well as, The control system is electrically connected to the temperature sensing element and the heating element.

2. The microfluidic control device as described in claim 1, characterized in that, The temperature sensing element is provided in multiple forms and is evenly distributed within the flow channel.

3. The microfluidic control device as described in claim 1, characterized in that, The heating element is provided in multiple ways, and the multiple heating elements are staggered and distributed in the flow channel.

4. The microfluidic control device as described in claim 1, characterized in that, The heating element and the temperature sensing element are misaligned.

5. The microfluidic control device as described in claim 1, characterized in that, The heating element is configured as a heating plate.

6. The microfluidic control device as described in claim 1, characterized in that, The flow channel is configured with a streamlined structure.

7. The microfluidic control device as described in claim 1, characterized in that, The flow channel is provided in multiple ways, and the multiple flow channels are arranged in parallel between the air outlet and the air inlet and are all connected to the air outlet and the air inlet.

8. The microfluidic control device as described in claim 6, characterized in that, The width of the flow channel near the axis of the air inlet is greater than the width of the flow channel away from the axis of the air inlet.

9. The microfluidic control device as described in claim 6, characterized in that, The length of the flow channel near the axis of the air inlet is less than the length of the flow channel away from the axis of the air inlet.

10. The microfluidic control device as claimed in claim 1, characterized in that, The microfluidic control device further includes: A first guide vane is disposed between the flow channel and the air inlet; and, The second guide plate is disposed between the flow channel and the air outlet.

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