Intelligent layered on-site small vacuum embedded heating and evacuating device

Abstract

The utility model discloses a kind of embedded heating evacuation devices of intelligent layered field small vacuum, comprising: double-layer pipe, double-layer pipe includes inner tube and coaxial sleeve is set on the outer side of inner tube outer tube;At least two blocking plates, connect between inner tube and outer tube along radial direction, and the annular space between inner tube and outer tube is separated into heat insulation cavity and heating cavity;Heating system, including controller, multiple heating elements and temperature measuring element on the outer wall of inner tube arranged in heating cavity;Controller, heating element and temperature measuring element are electrically connected;Wherein, heating system is configured as: when the average temperature detected by temperature measuring element is higher than the first temperature threshold value of pre-setting, controller reduces the power of heating element;When the average temperature detected by temperature measuring element is lower than the second temperature threshold value of pre-setting, controller increases the power of heating element.The device can be in limited space, build an embedded heating evacuation system with efficient heat management, uniform temperature field and accurate control.

Description

Technical Field

[0001] This utility model relates to the field of vacuum acquisition technology, and in particular to an intelligent layered on-site small vacuum embedded heating evacuation device. Background Technology

[0002] In the field of vacuum acquisition technology, for small-scale vacuum applications requiring accompanying heating processes, such as material drying, component degassing, or fluid impregnation in on-site environments, corresponding vacuum pumping devices have become key equipment. These devices often need to simultaneously pump a vacuum and controllably heat the flowing medium or connected containers to improve process efficiency and effectiveness.

[0003] In existing technologies, vacuum pumping devices with heating functions typically integrate the heating unit with the vacuum flow channel. However, in practical applications, there is still room for improvement in terms of heat management and uniformity control. For example, during the vacuuming process, changes in medium flow rate and fluctuations in ambient temperature can cause dynamic changes in heat load. Simple control logic cannot achieve rapid and stable tracking and adjustment, thus affecting the stability of process parameters.

[0004] Therefore, how to construct an embedded heating and evacuation system with efficient thermal management, uniform temperature field, and precise control within a limited space is a practical problem faced in the development of related technologies. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, this utility model provides an intelligent layered embedded heating and evacuation device for small vacuum applications. This device can construct an embedded heating and evacuation system with efficient thermal management, uniform temperature field and precise control within a limited space.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This utility model provides an intelligent layered embedded heating evacuation device for on-site small vacuum, comprising:

[0008] A double-layer tube, comprising an inner tube and an outer tube coaxially sleeved on the outside of the inner tube, wherein the inner tube is used to form a vacuum flow channel;

[0009] At least two baffles are radially connected between the inner tube and the outer tube, and the annular space between the inner tube and the outer tube is divided into a heat insulation cavity and a heating cavity;

[0010] The heating system includes a controller, multiple heating elements arranged on the outer wall of an inner tube within the heating chamber, and a temperature measuring element; the controller, heating elements, and temperature measuring element are electrically connected.

[0011] The heating system is configured as follows:

[0012] When the average temperature detected by the temperature sensing element is higher than a preset first temperature threshold, the controller can reduce the power of the heating element;

[0013] When the average temperature detected by the temperature sensing element is lower than a preset second temperature threshold, the controller can increase the power of the heating element.

[0014] Furthermore, the heating elements are distributed circumferentially along the inner tube.

[0015] Furthermore, the number of heating elements is at least three.

[0016] Furthermore, the temperature sensing elements are distributed along the circumference of the inner tube, and the number is at least three.

[0017] Furthermore, the heating system further includes:

[0018] Multiple electric fans are mounted on a baffle plate inside the heating chamber and are electrically connected to the controller;

[0019] in,

[0020] When the variance of the temperature values ​​detected by the multiple temperature sensing elements is greater than a preset third threshold, the controller can start the electric fan to mix the gas in the heating chamber.

[0021] Furthermore, the electric fan is distributed circumferentially along the barrier plate.

[0022] Furthermore, the number of electric fans is at least two.

[0023] Furthermore, the heating system further includes:

[0024] Multiple guide plates are disposed on the inner wall of the outer tube within the heating chamber and extend in a spiral shape along the axial direction of the outer tube.

[0025] Furthermore, it also includes:

[0026] A reflective film is disposed on the inner wall of the outer tube within the heating chamber.

[0027] This utility model has at least the following advantages or beneficial effects:

[0028] This invention employs a barrier plate, which divides the annular space into a heat insulation chamber and a heating chamber; it also incorporates a heating system that automatically adjusts the power of the heating element based on the average temperature of the temperature sensing element. Overall, this invention improves thermal energy utilization efficiency and achieves stable temperature control.

[0029] This invention employs an electric fan structure, which mixes the gas within the heating chamber. It also utilizes a controller to activate the fan based on temperature variance, automatically promoting airflow circulation when temperature unevenness is detected. Overall, this invention effectively reduces temperature fluctuations and improves the uniformity of the temperature field.

[0030] This invention employs a reflective film structure, which can reflect thermal radiation. Overall, this invention can reduce heat loss and improve thermal energy utilization efficiency. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 A schematic diagram of the inner tube, outer tube, and barrier plate structure of an intelligent layered on-site small vacuum embedded heating evacuation device (excluding the heating system and reflective film).

[0033] Figure 2 This is a schematic diagram of the heating element, temperature sensing element, electric fan, inner tube, and outer tube (excluding the outer tube at the heating cavity).

[0034] Figure 3 A schematic diagram of the outer tube, guide plate, and reflective film structure;

[0035] Figure 4 This is a front view of the outer tube, guide plate, and reflective membrane structure.

[0036] Figure label:

[0037] 1-Double-layer tube; 11-Inner tube; 12-Outer tube; 13-Blocking plate; 14-Insulation cavity; 15-Heating cavity;

[0038] 2-Heating system; 21-Heating element; 22-Temperature sensing element; 23-Electric fan; 24-Baffle plate;

[0039] 3-Reflective film. Detailed Implementation

[0040] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0041] It should be noted that the following detailed descriptions are exemplary and intended to provide further illustration of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0042] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0043] In this utility model, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of the structural relationship between the various parts or elements of this utility model and do not specifically refer to any part or element in this utility model. They should not be construed as limitations on this utility model.

[0044] In this utility model, terms such as "fixed", "connected", and "linked" should be interpreted broadly, indicating that it can be a fixed connection, an integral connection, or a detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. For relevant scientific researchers or technicians in this field, the specific meaning of the above terms in this utility model can be determined according to the specific circumstances, and should not be construed as a limitation of this utility model.

[0045] The embodiments of this utility model will be described in detail below.

[0046] This utility model embodiment discloses an intelligent layered on-site small vacuum embedded heating evacuation device.

[0047] The overall solution of this embodiment aims to improve the performance of the embedded heating evacuation device in terms of thermal management, temperature uniformity and control accuracy through the organic combination of a series of structural designs and control strategies.

[0048] Specifically, a double-tube structure is adopted, in which the inner tube 11 forms a vacuum flow channel, and the outer tube 12 provides external protection. The annular space is divided into a heat insulation chamber 14 and a heating chamber 15 by a radially connected baffle plate 13. This layered design helps to reduce heat loss to the external environment, while concentrating the heating function around the inner tube 11, thereby improving the efficiency of heat utilization.

[0049] The heating system 2 integrates a controller (not shown), multiple heating elements 21, and a temperature sensing element 22. It is configured to dynamically adjust the power of the heating elements 21 based on a comparison between the average temperature detected by the temperature sensing element 22 and a preset threshold. This feedback control mechanism can respond to changes in heat load and maintain temperature stability. The heating system 2 also includes an electric fan 23, mounted on the baffle plate 13 and connected to the controller. When the temperature variance detected by the temperature sensing element 22 exceeds a preset threshold, the controller activates the electric fan 23 to mix the gas within the heating chamber. This design helps eliminate localized hot or cold spots and promotes a uniform temperature field. Furthermore, a baffle plate 24 is disposed on the inner wall of the outer tube 12 within the heating chamber 15 and extends spirally along the axial direction. This guides the airflow along a spiral path, extending the heat exchange time and enhancing heat transfer efficiency.

[0050] The reflective film 3 is attached to the inner wall of the outer tube 12 inside the heating cavity 15. It reduces heat loss by reflecting heat radiation and further improves the efficiency of heat utilization.

[0051] The details are as follows:

[0052] Figure 1 A schematic diagram of the inner tube, outer tube, and barrier plate structure of an intelligent layered on-site small vacuum embedded heating evacuation device (excluding the heating system and reflective film). Figure 2 This is a schematic diagram of the heating element, temperature sensing element, electric fan, inner tube, and outer tube (excluding the outer tube at the heating cavity). As can be seen from the diagram, the device includes core components such as double-layer tube 1, baffle plate 13, and heating system 2.

[0053] The double-walled tube 1 serves to provide a vacuum flow channel and achieve thermal management. It consists of an inner tube 11 and an outer tube 12. The inner tube 11 forms the vacuum flow channel and is responsible for conveying the medium being processed. Its material can be stainless steel, copper, or aluminum alloy to provide good thermal conductivity and corrosion resistance. The outer tube 12 is coaxially sleeved on the outside of the inner tube 11, providing structural support and external protection. Its material can be carbon steel, stainless steel, or insulating composite materials. The double-walled tube 1 can be manufactured using metal extrusion molding, spinning, or welding assembly to ensure its structural integrity and sealing performance. In this embodiment, the cross-sectional shape of the inner tube 11 and the outer tube 12 is circular; in other embodiments, the cross-sectional shape of the inner tube 11 and the outer tube 12 can also be elliptical or polygonal to adapt to different installation space requirements.

[0054] A baffle plate 13 is radially connected between the inner tube 11 and the outer tube 12, dividing the annular space between them into different functional cavities. The baffle plate 13 can be made of stainless steel, aluminum plate, or ceramic composite material, with a thickness ranging from 1mm to 5mm, preferably 2mm. It can be connected by welding, riveting, or bolting. In this embodiment, two baffle plates 13 are used; in other embodiments, three or four baffle plates 13 can be used to provide more cavity partitioning options. Through the partitioning by these baffle plates 13, the annular space between the inner tube 11 and the outer tube 12 is divided into an insulation cavity 14 and a heating cavity 15. The insulation cavity 14 reduces heat loss to the external environment and improves heat utilization efficiency; it can be filled with insulation materials such as ceramic fiber or an air layer. The heating cavity 15 houses the heating system 2 and concentrates heat to heat the inner tube 11. This layered design reduces radial heat conduction loss by isolating heat flow paths, thereby improving overall energy efficiency.

[0055] The heating system 2 includes a controller (not shown in the figure), eight heating elements 21 and eight temperature sensing elements 22, and its function is to realize intelligent heating and temperature control of the inner tube 11.

[0056] Heating elements 21 are arranged on the outer wall of the inner tube 11 within the heating chamber 15. Their function is to convert electrical energy into heat energy to heat the medium within the inner tube 11 and its flow channels. The heating elements 21 can be selected from resistance wire, thin-film heaters, or ceramic heaters; their installation can be achieved through clamp fixing, thermally conductive adhesive bonding, or mechanical pressing. In this embodiment, the heating elements 21 are uniformly distributed circumferentially along the inner tube 11; in other embodiments, the heating elements 21 can also be non-uniformly distributed axially along the inner tube 11 to adapt to specific heat load requirements. In other embodiments, the number of heating elements 21 can also be three or six to provide comprehensive heating coverage. This circumferential distribution design, through multi-point heat input, helps to reduce local temperature gradients and improve thermal field uniformity.

[0057] Temperature sensing elements 22 are arranged on the outer wall of the inner tube 11 within the heating chamber 15, and their function is to monitor the temperature distribution of the inner tube 11 in real time. The type of temperature sensing element 22 can be a thermocouple, a resistance temperature detector (RTD), or an infrared sensor; its installation can be achieved through threaded installation, adhesive bonding, or embedding into a slot. In this embodiment, eight temperature sensing elements 22 are evenly spaced along the circumference of the inner tube 11; in other embodiments, the number of temperature sensing elements 22 can also be three or five, thereby obtaining accurate temperature data.

[0058] Furthermore, the heating system 2 further includes a plurality of electric fans 23 mounted on a baffle plate 13 within the heating chamber 15. The function of the electric fans 23 is to mix the gas within the heating chamber 15, promote thermal convection, and reduce the temperature gradient. The type of electric fan 23 can be selected from axial fans or centrifugal fans. In this embodiment, the electric fans 23 are uniformly distributed circumferentially along the baffle plate 13; in other embodiments, the electric fans 23 may also be asymmetrically distributed radially along the baffle plate 13 to generate a specific airflow pattern. In this embodiment, the number of electric fans 23 is two; in other embodiments, the number of electric fans 23 may also be four or six to enhance the gas mixing capacity.

[0059] The controller is electrically connected to the heating element 21, the temperature measuring element 22, and the electric fan 23. Its function is to dynamically adjust the heating power and mix the gas in the heating chamber 15 based on the temperature measurement data. The controller can be implemented using a microprocessor, PLC module, or embedded system and is equipped with a PID control algorithm.

[0060] Heating system 2 is configured to execute specific control logic:

[0061] When the average temperature detected by the temperature sensing element 22 is higher than a preset first temperature threshold, the controller can reduce the power of the heating element 21 to prevent overheating. The preset first temperature threshold can be between 200°C and 250°C, preferably 225°C.

[0062] When the average temperature detected by the temperature sensing element 22 is lower than the preset second temperature threshold, the controller can increase the power of the heating element 21 to maintain the target temperature. The preset second temperature threshold can be from 100°C to 150°C, preferably 125°C.

[0063] This control mechanism, through feedback regulation, can respond to changes in heat load, such as fluctuations in medium flow rate or changes in ambient temperature, thereby maintaining temperature stability.

[0064] In addition, the controller is also configured as follows:

[0065] When the variance of the temperature values ​​detected by multiple temperature sensing elements 22 exceeds a preset third threshold, the electric fan 23 is activated to mix the gas in the heating chamber 15. The preset third threshold can be from 5°C² to 20°C², preferably 10°C².

[0066] This design helps eliminate localized hot or cold spots by automatically activating the fan when uneven temperature is detected, thereby improving the temperature field distribution.

[0067] Figure 3 A schematic diagram of the outer tube, guide plate, and reflective film structure; Figure 4This is a front view of the outer tube, guide plates, and reflective film structure. As can be seen from the figure, the heating system 2 further includes multiple guide plates 24, which are disposed on the inner wall of the outer tube 12 within the heating chamber 15 and extend spirally along the axial direction of the outer tube 12. The function of the guide plates 24 is to guide the airflow along the spiral path, prolonging the heat exchange time and enhancing the heat transfer efficiency. The material of the guide plates 24 can be selected from aluminum plate, stainless steel plate, or thermally conductive plastic, and the spiral angle can be from 23° to 80°, preferably 60°. In this embodiment, the spiral extension direction of the guide plates 24 is clockwise; in other embodiments, the spiral extension direction of the guide plates 24 can also be counterclockwise or alternating directions to optimize airflow disturbance. This spiral structure improves heat exchange efficiency by increasing the airflow path length and turbulence.

[0068] Furthermore, this embodiment includes a reflective film 3, which is disposed on the inner wall of the outer tube 12 within the heating cavity 15. The function of the reflective film 3 is to reflect thermal radiation and reduce heat loss through the outer tube 12. The material of the reflective film 3 can be selected from aluminum foil, silver coating, or ceramic reflective layer, and the thickness can be from 0.1 mm to 1 mm, preferably 0.5 mm. The reflective film 3 can be manufactured using sputtering, coating, or lamination processes. In this embodiment, the reflective film 3 covers the entire inner wall of the outer tube 12 within the heating cavity 15; in other embodiments, the reflective film 3 can also partially cover or adopt a patterned design to balance heat reflection and cost.

[0069] Overall, this invention combines a double-layer tube 1, a heating system 2, and a reflective film 3. Through its layered insulation and centralized heating structure, it effectively reduces heat loss and stabilizes temperature control. The circumferential distribution of multiple heating elements 21 and temperature sensing elements 22 improves heating uniformity. Feedback from the temperature sensing elements 22 and the controller allows for dynamic power adjustment and responsiveness to changes in heat load. The electric fan 23 and the baffle plate 24 promote airflow mixing and extend heat exchange time. The reflective film 3 reflects radiant heat and improves energy efficiency. This combination of features provides a more reliable and efficient thermal management solution for small vacuum applications, offering positive effects on improving process stability and energy efficiency.

[0070] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An intelligent layered on-site small vacuum embedded heating evacuation device, characterized in that, include: A double-layer tube (1) includes an inner tube (11) and an outer tube (12) coaxially sleeved on the outside of the inner tube (11). The inner tube (11) is used to form a vacuum flow channel. At least two baffles (13) are radially connected between the inner tube (11) and the outer tube (12), and divide the annular space between the inner tube (11) and the outer tube (12) into a heat insulation chamber (14) and a heating chamber (15). The heating system (2) includes a controller, a plurality of heating elements (21) arranged on the outer wall of the inner tube (11) inside the heating chamber (15), and a temperature measuring element (22); the controller, the heating elements (21) and the temperature measuring element (22) are electrically connected; The heating system (2) is configured as follows: When the average temperature detected by the temperature sensing element (22) is higher than the preset first temperature threshold, the controller can reduce the power of the heating element (21); When the average temperature detected by the temperature sensing element (22) is lower than the preset second temperature threshold, the controller can increase the power of the heating element (21).

2. The intelligent layered on-site small vacuum embedded heating evacuation device according to claim 1, characterized in that, The heating element (21) is distributed circumferentially along the inner tube (11).

3. The intelligent layered on-site small vacuum embedded heating evacuation device according to claim 2, characterized in that, The number of heating elements (21) is at least three.

4. The intelligent layered on-site small vacuum embedded heating and evacuation device according to claim 1, characterized in that, The temperature measuring elements (22) are distributed circumferentially along the inner tube (11), and the number is at least 3.

5. The intelligent layered on-site small vacuum embedded heating evacuation device according to claim 1, characterized in that, The heating system (2) further includes: Multiple electric fans (23) are mounted on a baffle plate (13) inside the heating chamber (15) and are electrically connected to the controller; in, When the variance of the temperature values ​​detected by the plurality of temperature measuring elements (22) is greater than a preset third threshold, the controller can start the electric fan (23) to mix the gas in the heating chamber (15).

6. The intelligent layered on-site small vacuum embedded heating evacuation device according to claim 5, characterized in that, The electric fan (23) is distributed circumferentially along the barrier plate (13).

7. The intelligent layered on-site small vacuum embedded heating and evacuation device according to claim 5, characterized in that, The number of electric fans (23) is at least 2.

8. The intelligent layered on-site small vacuum embedded heating evacuation device according to claim 5, characterized in that, The heating system (2) further includes: Multiple guide plates (24) are disposed on the inner wall of the outer tube (12) inside the heating chamber (15) and extend in a spiral shape along the axial direction of the outer tube (12).

9. The intelligent layered on-site small vacuum embedded heating evacuation device according to claim 1 or 5, characterized in that, Further includes: A reflective film (3) is disposed on the inner wall of the outer tube (12) inside the heating chamber (15).

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