A constant high temperature device and its air bath apparatus

Abstract

This invention discloses a constant-temperature equipment and its air bath device. The air bath device includes: a constant-temperature heating module for constant-temperature heating, comprising a protective cover, a nickel-chromium alloy heating wire, and an air duct. The protective cover has inner and outer layers and an insulation layer located between the inner and outer layers. The nickel-chromium alloy heating wire is constructed as a cylindrical spiral heating element disposed in the inner layer of the protective cover, and the inner cavity of the heating element serves as a heating chamber. The air duct is located in the inner layer of the protective cover. A lifting module is used to control the height of the constant-temperature heating module and adjust the position of the material in the heating chamber. An alarm module and a control module are also included. The constant-temperature equipment includes the air bath device. The air bath device can continuously provide a uniformly heated chamber at 500 degrees Celsius, solving the problems of uneven temperature distribution and low temperature control accuracy in existing air bath devices, and solving the problem that existing oil bath devices cannot reach a high temperature of 500 degrees Celsius, providing a good and stable constant-temperature environment for experiments and tests.

Description

Technical Field

[0001] This invention relates to the field of constant high temperature heating equipment technology, specifically to a constant high temperature equipment and its air bath device. Background Technology

[0002] Constant temperature heating devices are widely used in high-temperature testing, material heat resistance evaluation, and constant temperature heating. However, existing equipment has shortcomings:

[0003] 1. Traditional high-temperature heating devices that use resistance wires or heating wires to provide heat are difficult to ensure the uniformity of the internal temperature of the cavity in high-temperature environments. This can easily lead to problems such as large temperature fluctuations and local overheating, which in turn affect the accuracy and reliability of experimental data.

[0004] 2. Traditional oil-based heating media offers good uniformity, but can only reach a maximum temperature of around 200°C, failing to meet the 500°C temperature requirement.

[0005] Therefore, there is an urgent need to develop a high-precision air bath heating device capable of operating at 500℃. Summary of the Invention

[0006] The technical problem to be solved by the present invention is that the existing technology is difficult to meet the high-precision constant temperature heating at 500℃. The purpose is to provide a constant high temperature device and its air bath device to solve the above-mentioned problem.

[0007] This invention is achieved through the following technical solution:

[0008] In a first aspect, the present invention provides an air bath device, comprising:

[0009] The constant temperature heating module for constant temperature heating includes a protective cover, a nickel-chromium alloy heating wire and an air duct. The protective cover has inner and outer layers and an insulation layer between the inner and outer layers. The nickel-chromium alloy heating wire is constructed as a cylindrical spiral heating body set in the inner layer of the protective cover. The inner cavity of the heating body is used as a heating cavity. The air duct is located in the inner layer of the protective cover.

[0010] The lifting module, connected to the protective cover, is used to control the height of the constant temperature heating module and adjust the position of the material in the heating chamber;

[0011] An alarm module is used to monitor the temperature of the heating chamber in real time.

[0012] The control module is used to control the operation of the air bath device.

[0013] In one possible design, the nickel-chromium alloy heating wire is selected from nickel-chromium alloy wire with a diameter of not less than 1 mm and is bent and wound into a spiral heating body with a diameter of 8-12 mm. The spiral of the heating body increases in interval from bottom to top. Correspondingly, the inner layer of the protective cover is connected to the nickel-chromium alloy heating wire through a vacuum insulation component to form a vacuum insulation.

[0014] The air duct includes a spiral section located between adjacent nickel-chromium alloy heating wires and an air vent on the bottom surface of the protective cover. The spiral section is connected to and communicates with the air vent, and there are two air vents arranged opposite each other.

[0015] In one possible design, the protective cover includes an outer cover, an inner cover, and an insulation layer;

[0016] The outer cover is a cylindrical structure with an open top and a closed bottom. The outer bottom surface of the outer cover is connected to the lifting module through a middle plate. The outer cover is covered with a protective curtain made of flame-retardant cloth.

[0017] The inner cover is a hollow cylindrical structure with openings at both ends. The inner cover is inserted into the outer cover and connected to the bottom of the outer cover through several columns. Correspondingly, nickel-chromium alloy heating wires are set on the inner wall of the inner cover.

[0018] A gap is left between the outer cover and the inner cover, and the insulation layer uses a vacuum insulation structure and is embedded in the gap.

[0019] In one possible design, the constant temperature heating module includes a base frame and a top cover; a protective cover is disposed in the base frame; the top cover is disposed on the top surface of the protective cover and is used to seal the upper opening of the heating body, and the top cover is provided with a reserved opening for material to be placed into the heating chamber.

[0020] In one possible design, the top cover includes a cover plate, a handle, and an interface;

[0021] Two cover plates are provided and rotatably mounted on the base frame. The two cover plates are arranged opposite each other to form a split structure. A second inner groove is provided on the contact surface of the two cover plates. When the contact surfaces of the two cover plates abut, the second inner groove connects and forms the reserved opening. Correspondingly, a soft heat insulation layer is provided on the contact surface.

[0022] The handle is attached to the cover plate and is used to rotate the cover plate;

[0023] The interface is located on the cover plate and is used to connect monitoring equipment, and the interface is detachably equipped with a sealing component.

[0024] In one possible design, the lifting module includes a guide frame, an electric cylinder, and a guide bracket;

[0025] The guide frame is located below the constant temperature heating module, the electric cylinder is located inside the guide frame, and the push rod of the electric cylinder extends upward through the guide frame and connects to the guide bracket.

[0026] The guide bracket includes a housing and a guide rod. The lower end of the housing is open and connected to the push rod of the electric cylinder. The upper end of the housing abuts against the constant temperature heating module. The upper end of the guide rod is connected to the housing, and the lower end of the guide rod passes through the guide frame.

[0027] In one possible design, the control module includes a control box, a touch screen housed within the control box, and control buttons located on the outside of the touch screen.

[0028] In one possible design, the system also includes a frame, with the constant temperature heating module located at the top of the frame, the lifting module located inside the frame and below the constant temperature heating module, the alarm module located on the frame and connected to the constant temperature heating module, and the control module located on the side of the frame.

[0029] In one possible design, the frame has maintenance doors on its sides, at least one of which has a push handle, and the frame has casters on its bottom surface.

[0030] Secondly, the present invention provides a constant high temperature device, including the aforementioned air bath device.

[0031] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0032] 1. The air bath device can continuously provide a uniform 500-degree heating chamber, which solves the problems of uneven temperature distribution and low temperature control accuracy of air bath devices in the prior art, and solves the problem that oil bath devices in the prior art cannot reach a high temperature of 500 degrees, thus providing a good and stable constant high temperature environment for experiments and tests.

[0033] 2. The structure of the constant temperature heating module has been improved by combining insulation layer, point contact form, vacuum insulation and other elements into an overall heat insulation structure. This can reduce the heat loss of the heating element and reduce the outer surface temperature of the protective cover. This solves the problem of overheating of the outer surface after long-term high-temperature operation of conventional equipment, provides better safety and avoids the problem of personnel being burned.

[0034] 3. Utilizing an air bath provides a more reliable temperature environment and temperature data. The relevant data can be recorded and exported, providing basic parameters for experimental research and other fields, and assisting in improving process quality. Attached Figure Description

[0035] To more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort. In the drawings:

[0036] Figure 1 This is a schematic diagram of an air bath device.

[0037] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure.

[0038] Figure 3 for Figure 2 A schematic diagram of the isometric structure.

[0039] Figure 4 This is a schematic diagram of the inner cover.

[0040] Figure 5 This is a partial structural diagram of the constant temperature heating module.

[0041] Figure 6 This is a top view of the top cover structure.

[0042] Figure 7 This is a schematic diagram of the finite element analysis of the constant temperature heating module.

[0043] The attached diagram shows the markings and corresponding component names:

[0044] 100. Constant temperature heating module; 200. Lifting module; 300. Alarm module; 400. Control module; 500. Frame; 1. Protective cover; 101. Outer cover; 102. Inner cover; 103. Insulation layer; 104. Column; 2. Nickel-chromium alloy heating wire; 3. Air duct; 301. Spiral section; 302. Air outlet; 4. Base frame; 5. Top cover; 501. Cover plate; 502. Handle; 503. Interface; 504. Soft insulation layer; 6. Reserved opening; 7. Guide frame; 8. Electric cylinder; 9. Guide bracket; 901. Housing; 902. Guide rod; 10. Maintenance door; 11. Push handle; 12. Casters. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0046] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that these specific details are not necessary to practice the invention. In other embodiments, well-known structures, circuits, materials, or methods have not been specifically described in order to avoid obscuring the invention.

[0047] Example:

[0048] There are two main types of constant-temperature heating devices in existing technology. The first is the air bath heating device, which suffers from localized heat concentration, with high temperatures near the heating wire and relatively low temperatures further away, resulting in poor uniformity and inaccurate temperature control. Under conditions of 500°C and continuous operation for several days, the outer surface becomes extremely hot to the touch, indicating poor heat insulation. The second type is the oil bath heating device, which offers high temperature uniformity, but its maximum temperature can only reach around 200°C, failing to meet the highest temperature requirements and is prone to leaks and related hazards. It poses a high safety risk when testing certain hazardous materials for multiple consecutive days.

[0049] Based on this, the air bath device is used to solve the problems existing in the prior art, to meet usage requirements and make up for the shortcomings of existing products, specifically:

[0050] One key issue is the high temperature. Nickel-chromium alloy wire is selected as the heating wire (i.e., furnace wire). Nickel-chromium alloy wire possesses high resistivity, excellent high-temperature oxidation resistance, a stable temperature coefficient of resistance, and a high melting point, making it an ideal electrothermal material. Its operating temperature can reach up to 1200℃, and when heated in air, a dense Cr2O3 oxide film forms on its surface, effectively preventing further oxidation and extending its service life. Furthermore, the ductility of the nickel-chromium alloy wire is utilized to stretch and bend it, transforming it from a filament into a cylindrical helix, resulting in a heating element with a certain diameter and a tubular shape. The cavity temperature of this heating element can reach 500 degrees Celsius for extended periods.

[0051] Secondly, there's the issue of temperature uniformity. On one hand, the structure is improved by controlling the spacing (i.e., the wire density) of the cylindrical spiral wire wound with nickel-chromium alloy. A corresponding air duct 3 is designed to control the wire density and prevent localized overheating or underheating. The air duct 3 is used to blow air and promote hot air circulation within the heating element, forcing convection to accelerate heat transfer, eliminating localized temperature differences, and improving heating uniformity. Furthermore, since the heating element has an open design, care is taken to minimize airflow through the opening (the part connecting the heating element to the outside) to reduce heat loss. On the other hand, a control module 400 is designed. After the temperature stabilizes, low-power heating is required continuously. Heat loss varies at different set temperatures; the control module 400 allows for accurate regulation, effectively ensuring a temperature control accuracy of ±1°C for the air bath heating method.

[0052] Thirdly, there is the issue of safety and heat insulation. The heating body is equipped with a protective cover 1, which has a double-layer structure. The inner layer is connected to the heating body and forms a heating cavity. Heat insulation material is placed between the inner and outer layers. The outer layer is used to isolate the connection with the outside world. The outer layer is also equipped with a protective curtain to reduce heat radiation from the inside to the outside, effectively reducing temperature conduction, lowering surface temperature, flame retardancy, and dust prevention. The temperature of the outer surface is less than or equal to 50°C under long-term high-temperature operation, making it safer and more user-friendly for operation.

[0053] The structure of the air bath device will be further explained below, such as... Figures 1-7 As shown, in a first aspect, the present invention provides an air bath device, comprising:

[0054] The constant temperature heating module 100 for constant temperature heating includes a protective cover 1, a nickel-chromium alloy heating wire 2 and an air duct 3. The protective cover 1 has inner and outer layers and a heat insulation layer 103 located between the inner and outer layers. The nickel-chromium alloy heating wire 2 is constructed as a cylindrical spiral heating body set in the inner layer of the protective cover 1. The inner cavity of the heating body is used as a heating cavity. The air duct 3 is located in the inner layer of the protective cover 1.

[0055] The lifting module 200 is connected to the protective cover 1 and is used to control the height of the constant temperature heating module 100 and adjust the position of the material in the heating chamber.

[0056] Alarm module 300 is used to monitor the temperature of the heating chamber in real time;

[0057] The control module 400 is used to control the operation of the air bath device.

[0058] The constant temperature heating module 100 is energized to heat the nickel-chromium alloy heating wire 2, thereby heating the air inside the heating chamber (e.g., the maximum temperature of the heating chamber can be set to 550 degrees Celsius to meet the 500-degree high-temperature requirement of the test, or the maximum temperature can be appropriately increased or decreased according to actual needs), and can maintain this temperature for more than 72 hours, giving the constant temperature heating module 100 good heat preservation capabilities. The protective cover 1 prevents internal heat radiation to the outside, reducing heat loss and lowering the energy consumption of the constant temperature heating module 100, while also reducing the external surface temperature of the constant temperature heating module 100, making operation safer and more user-friendly.

[0059] As is easy to understand, in addition to meeting the high temperature requirements of the test, the heating element can also be adjusted to any desired temperature within the maximum temperature range, making it flexible and convenient to use.

[0060] The lifting module 200 is used to adjust the height of the constant temperature heating module 100, ensuring it is at an appropriate height for subsequent operations. It can also be used to place and remove the object being heated. Furthermore, care should be taken to maintain stability during the lifting process to avoid disrupting the temperature uniformity within the heating chamber.

[0061] The alarm module 300 is used to monitor the temperature of the heating chamber, thereby working with the control module 400 to achieve negative feedback control and precise temperature control. At the same time, in conjunction with the control module 400, the data recorded by the alarm module 300 can be exported, providing basic parameters for experimental research and other fields, and assisting in the improvement of process quality. In addition, the alarm module 300 can also provide warning signals to surrounding personnel so that staff can make timely adjustments or evacuations, ensuring the smooth progress and safety of the test.

[0062] Before testing, the control module 400 can set various parameters according to the test requirements (such as heating rate, heating time, holding time, heating steps, cooling, etc.). During the test, the control module 400 controls the air bath device to automatically complete the heating, holding, cooling, and stopping actions according to the set parameters (heating will automatically stop after the test is completed). The degree of automation and intelligence is higher, reducing the burden on the staff.

[0063] In one possible implementation, the nickel-chromium alloy heating wire 2 is a nickel-chromium alloy wire with a diameter of not less than 1 mm and is bent and wound into a spiral heating body with a diameter of 8-12 mm. The spiral of the heating body increases in interval from bottom to top. Correspondingly, the inner layer of the protective cover 1 is connected to the nickel-chromium alloy heating wire 2 through a vacuum insulation component to form a vacuum insulation.

[0064] The air duct 3 includes a spiral section 301 located between adjacent nickel-chromium alloy heating wires 2 and an air outlet 302 opened on the bottom surface of the protective cover 1. The spiral section 301 is connected and communicates with the air outlet 302. There are two air outlets 302 arranged opposite to each other.

[0065] Based on the above design scheme, the spiral of the heating element increases in interval from bottom to top, so the nickel-chromium alloy heating wire 2 has a denser structure at the bottom and a sparser structure at the top. The heat in the lower part of the heating element is higher than that in the upper part. That is, the air bath device is designed as an open structure in order to make the heated object usable. It connects to the outside through the opening at the top of the heating element. By reducing the density of the nickel-chromium alloy heating wire 2 in the upper part, the heat generation and heat loss in the upper part are reduced. The heat in the lower part of the heating element can be transferred to the upper part through the air duct 3. The air flow is controlled to make the opening at the top of the heating element as free of air as possible. This achieves uniform temperature of the entire heating element while further reducing the heat loss at the opening at the top of the heating element.

[0066] Accordingly, while ensuring a denser bottom and a sparser top, the actual density of the nickel-chromium alloy heating wire 2 (i.e., the wire density) can be adjusted according to the actual usage based on factors such as the shape of the heating cavity and heating requirements. A reasonable distribution of the wire density ensures the temperature uniformity of the heating cavity and a long service life.

[0067] It is worth noting that the inner layer of the protective cover 1 is connected to the nickel-chromium alloy heating wire 2 via a vacuum insulation component. That is, the connection between the protective cover 1 and the nickel-chromium alloy heating wire 2 utilizes a vacuum environment to eliminate air molecules and block heat conduction and convection, resulting in an extremely low heat transfer coefficient and achieving highly efficient heat preservation. Heat loss from the sides of the heating element is greatly reduced, also keeping the temperature of the outer layer of the protective cover 1 within a suitable range, providing a safe operating space for personnel. It is easy to understand that any suitable existing model of vacuum insulation component can be selected, offering a wide range of choices and good practicality.

[0068] For the air duct 3, its spiral section 301 is located inside the protective cover 1 to ensure uniform temperature of the heating element. Its air outlet 302 is located on the bottom surface of the protective cover 1, with one air outlet for inlet and one for outlet. An internal circulation is formed by the fan to allow the high-temperature gas to flow and ensure temperature uniformity. At the same time, the internal circulation prevents the loss of high-temperature gas and avoids the reduction in the accuracy of maintaining high temperature caused by heating new gas.

[0069] Correspondingly, the constant temperature heating module 100 is externally connected to a blower module, and the working end of the blower module is connected to the air duct 3 and blows air through the air duct 3. It is easy to understand that any suitable existing model of blower module can be selected, with a wide range of choices and good practicality.

[0070] In one possible implementation, the protective cover 1 includes an outer cover 101, an inner cover 102, and an insulation layer 103;

[0071] The outer cover 101 is a cylindrical structure with an open top and a closed bottom. The outer bottom surface of the outer cover 101 is connected to the lifting module 200 through the middle plate. The outer cover 101 is provided with a protective curtain made of flame-retardant cloth.

[0072] The inner cover 102 is constructed as a hollow cylindrical structure with openings at both ends. The inner cover 102 is inserted into the outer cover 101 and connected to the bottom surface of the outer cover 101 through several columns 104. Correspondingly, the nickel-chromium alloy heating wire 2 is disposed on the inner wall surface of the inner cover 102.

[0073] A gap is left between the outer cover 101 and the inner cover 102, and the insulation layer 103 adopts a vacuum insulation structure and is embedded in the gap.

[0074] Based on the above design, the inner cover 102 uses a hollow structure to facilitate the installation of vacuum insulation components to achieve vacuum insulation. However, even with vacuum insulation achieved through these components, some heat is still transferred to the inner cover 102 of the protective cover 1 via the heating element. The inner cover 102 is connected to the outer cover 101 via a column 104. The compact column 104 achieves point contact and reduces the connection area between the two, significantly reducing the efficiency of heat conduction and decreasing the heat received by the outer cover 101. Simultaneously, an insulation layer 103 is embedded between the inner cover 102 and the outer cover 101. The insulation layer 103 provides insulation and eliminates the gap between the outer cover 101 and the inner cover 102, while also blocking heat convection based on the gap. This significantly reduces the heat transfer coefficient, resulting in a lower surface temperature for the outer cover 101, which also helps to maintain the continuous heat of the heating element.

[0075] It is worth noting that the perforated structure of the inner cover 102 can also accommodate part of the insulation layer 103, thereby filling the gaps and improving the insulation effect. In addition, the inner cover 102 also serves to protect the heating element and prevent it from being damaged during the test.

[0076] The outer cover 101 can be constructed into any suitable shape. The outer cover 101 is equipped with a protective curtain. The protective curtain blocks heat radiation and reduces heat loss on the one hand, and has a flame-retardant effect on the other hand, thus improving safety.

[0077] Optionally, the insulation layer 103 includes thermal insulation material and connecting ribs. The thermal insulation material is located between the outer cover 101 and the inner cover 102. The interior of the thermal insulation material is evacuated and constructed as a vacuum insulation cavity. Several connecting ribs are provided and used for the outer cover 101, the inner cover 102 and the thermal insulation material.

[0078] Based on the above thermal insulation structure, a thermal analysis of the constant temperature heating module 100 was performed using finite element analysis software, such as... Figure 7 As shown, when the inner cover 102 is heated to 500 degrees, the outer surface temperature of the outer cover 101 is less than 45 degrees.

[0079] In one possible implementation, the constant temperature heating module 100 includes a base frame 4 and a top cover 5; a protective cover 1 is disposed in the base frame 4; the top cover 5 is disposed on the top surface of the protective cover 1 and is used to block the upper opening of the heating body, and the top cover 5 is provided with a reserved opening 6 for material to be placed into the heating chamber.

[0080] Based on the above design, the base frame 4 is used to connect the various components of the constant temperature heating module 100, so that they form an organic whole, and the base frame 4 can be constructed into any suitable shape. The top cover 5 is used to cover the opening at the top of the heating body to reduce heat loss and ensure that the heating body is kept warm. Correspondingly, in order to facilitate the heated body to enter the heating body and be heated, a reserved opening 6 is reserved on the top cover 5.

[0081] Optionally, such as Figure 6 As shown, the upper cover 5 includes a cover plate 501, a handle 502, and an interface 503;

[0082] Two cover plates 501 are provided and rotatably mounted on the base frame 4. The two cover plates 501 are arranged opposite each other and form a split structure. A second inner groove is provided on the contact surface of the two cover plates 501. When the contact surfaces of the two cover plates 501 abut, the second inner groove connects and forms the reserved opening 6. Correspondingly, a soft heat insulation layer 504 is provided on the contact surface.

[0083] A handle 502 is provided on the cover plate 501 and is used to rotate the cover plate 501;

[0084] Interface 503 is mounted on cover plate 501 and used to connect monitoring equipment, and a sealing component is detachably mounted on interface 503.

[0085] Based on the above design, the handle 502 is preferably installed via point contact to reduce the contact area between the handle 502 and the cover plate 501, thereby reducing heat conduction and lowering the surface temperature of the cover plate 501, and also helping to reduce heat loss. The interface 503 is used to install monitoring equipment to monitor the temperature of the heating chamber in real time. Accordingly, each cover plate 501 is provided with at least one interface 503. The monitoring equipment includes, but is not limited to, temperature sensors, temperature control sensors, calibration sensors, and thermometers.

[0086] A flexible insulation layer 504 is provided on the contact surface of the cover plate 501. The flexible insulation layer 504 reduces heat loss from the contact surface of the cover plate 501 by utilizing its insulation properties, and also achieves clamping by utilizing its deformable characteristics, thus eliminating gaps on the contact surface of the cover plate 501 and achieving insulation. It is easy to understand that the flexible insulation layer 504 can be made of any suitable existing material.

[0087] Additionally, when interface 503 is not in use, i.e., when no monitoring equipment is installed, a sealing component made of any suitable material such as insulation cotton can be used to seal interface 503 to reduce heat loss. Similarly, if reserved port 6 is also not in use, it can also be sealed using any suitable sealing component.

[0088] In one possible implementation, the lifting module 200 includes a guide frame 7, an electric cylinder 8, and a guide bracket 9;

[0089] The guide frame 7 is located below the constant temperature heating module 100, and the electric cylinder 8 is located inside the guide frame 7. The push rod of the electric cylinder 8 extends upward through the guide frame 7 and connects to the guide bracket 9.

[0090] The guide bracket 9 includes a housing 901 and a guide rod 902. The lower end of the housing 901 is open and connected to the push rod of the electric cylinder 8. The upper end of the housing 901 abuts against the constant temperature heating module 100. The upper end of the guide rod 902 is connected to the housing 901, and the lower end of the guide rod 902 passes through the guide frame 7.

[0091] Based on the above design, the lifting module 200 is used to achieve the overall lifting of the constant temperature heating module 100. The electric cylinder 8 helps to reduce noise during the lifting process and achieve precise control, making the lifting smoother. The housing 901 of the guide bracket 9 and the guide rod 902 work together to ensure a smooth and wobbly lifting process, reduce friction, and improve service life.

[0092] Preferably, such as Figure 2As shown, at least two guide rods 902 are preferably provided, and each guide rod 902 has two spaced-apart limiting ring platforms. Based on this, the smoothness of lifting is improved by the cooperation of multiple guide rods 902, and the lifting range is limited by the limiting ring platforms to ensure that the heated object, such as the glass test tube, is not damaged during the ascent. Furthermore, one of the guide rods 902 is connected to a guide chain, which further improves the smoothness of lifting.

[0093] The guide frame 7 can be made of any suitable material and has high strength to cooperate with the guide bracket 9 to complete the lifting. The electric cylinder 8 can be any suitable existing model, with a wide range of choices and good practicality.

[0094] In one possible implementation, the control module 400 includes a control box, a touch screen disposed in the control box, and control buttons disposed on the outside of the touch screen.

[0095] Based on the above design, the control box contains any suitable existing control terminal, on which any suitable existing control program is burned. Operators control the device via a touchscreen and control buttons. For example, before testing, relevant parameters are set via the touchscreen, allowing the air bath device to automatically begin testing. In addition, multiple control buttons are provided for functions such as power on, alarm, emergency stop, heating start, heating stop, raising, and lowering. The interaction between the touchscreen and control buttons facilitates operation by the staff.

[0096] Correspondingly, the constant temperature heating module 100 can be controlled to start and stop independently. In case of an emergency, heating needs to be started manually to ensure safety.

[0097] In one possible implementation, the air bath device further includes a frame 500, a constant temperature heating module 100 disposed on the top of the frame 500, a lifting module 200 disposed inside the frame 500 and located below the constant temperature heating module 100, an alarm module 300 disposed on the frame 500 and connected to the constant temperature heating module 100, and a control module 400 disposed on the side of the frame 500.

[0098] Based on the above design, the various functional modules of the air bath device are connected into an organic whole by the frame 500. The frame 500 is equipped with maintenance doors 10, specifically, maintenance doors 10 are located on the side of the frame 500 to facilitate subsequent maintenance. At least one maintenance door 10 is equipped with a push handle 11 for easy access by staff. The bottom surface of the frame 500 is equipped with casters 12 to facilitate moving the air bath device to a suitable position. It is worth noting that the maintenance doors 10 are preferably made of thin-plate spray-coated skin, which reduces the overall weight of the equipment and the intensity of handling while maintaining strength.

[0099] Secondly, the present invention provides a constant temperature device, including the aforementioned air bath device. Based on this, the constant temperature device can further include other suitable functional modules in addition to the air bath device, thus enriching its functionality to meet different working requirements and improving its practicality. Furthermore, it is readily understood that the functional modules can be any suitable existing equipment, offering a wide range of choices.

[0100] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An air bath device, characterized in that, include: The constant temperature heating module (100) for constant temperature heating includes a protective cover (1), a nickel-chromium alloy heating wire (2) and an air duct (3). The protective cover (1) has inner and outer layers and an insulation layer (103) located between the inner and outer layers. The nickel-chromium alloy heating wire (2) is constructed as a cylindrical spiral heating body set in the inner layer of the protective cover (1). The inner cavity of the heating body is used as a heating cavity. The air duct (3) is located in the inner layer of the protective cover (1). The lifting module (200) is connected to the protective cover (1) and is used to control the height of the constant temperature heating module (100) and adjust the position of the material in the heating chamber; An alarm module (300) is used to monitor the temperature of the heating chamber in real time; The control module (400) is used to control the operation of the air bath device.

2. The air bath device according to claim 1, characterized in that, The nickel-chromium alloy heating wire (2) is selected from nickel-chromium alloy wire with a diameter of not less than 1 mm and bent and wound into a spiral heating body with a diameter of 8-12 mm. The spiral of the heating body increases in interval from bottom to top. Correspondingly, the inner layer of the protective cover (1) is connected to the nickel-chromium alloy heating wire (2) through a vacuum insulation component to form a vacuum insulation. The air duct (3) includes a spiral section (301) located between adjacent nickel-chromium alloy heating wires (2) and an air outlet (302) opened on the bottom surface of the protective cover (1). The spiral section (301) is connected and communicates with the air outlet (302). There are two air outlets (302) arranged opposite to each other.

3. The air bath device according to claim 1, characterized in that, The protective cover (1) includes an outer cover (101), an inner cover (102), and an insulation layer (103). The outer cover (101) is a cylindrical structure with an open top and a closed bottom. The outer bottom surface of the outer cover (101) is connected to the lifting module (200) through the middle plate. The outer cover (101) is provided with a protective curtain made of flame-retardant cloth. The inner cover (102) is a hollow cylindrical structure with openings at both ends. The inner cover (102) is inserted into the outer cover (101) and connected to the bottom surface of the outer cover (101) through several columns (104). Correspondingly, the nickel-chromium alloy heating wire (2) is set on the inner wall surface of the inner cover (102). A gap is left between the outer cover (101) and the inner cover (102), and the insulation layer (103) adopts a vacuum insulation structure and is embedded in the gap.

4. The air bath device according to claim 1, characterized in that, The constant temperature heating module (100) includes a base frame (4) and a top cover (5); a protective cover (1) is set in the base frame (4); the top cover (5) is set on the top surface of the protective cover (1) and is used to block the upper opening of the heating body, and the top cover (5) is provided with a reserved opening (6) for materials to be put into the heating chamber.

5. The air bath device according to claim 4, characterized in that, The top cover (5) includes a cover plate (501), a handle (502), and an interface (503); Two cover plates (501) are provided and rotatably mounted on the base frame (4). The two cover plates (501) are arranged opposite each other and form a split structure. A second inner groove is provided on the contact surface of the two cover plates (501). When the contact surfaces of the two cover plates (501) abut, the second inner groove connects and forms the reserved opening (6). Correspondingly, a soft heat insulation layer (504) is provided on the contact surface. A handle (502) is provided on the cover plate (501) and is used to rotate the cover plate (501). The interface (503) is provided on the cover plate (501) and is used to connect the monitoring equipment, and the interface (503) is detachably provided with a sealing component.

6. The air bath device according to any one of claims 1-5, characterized in that, The lifting module (200) includes a guide frame (7), an electric cylinder (8), and a guide bracket (9); The guide frame (7) is located below the constant temperature heating module (100), and the electric cylinder (8) is located inside the guide frame (7). The push rod of the electric cylinder (8) extends upward through the guide frame (7) and connects to the guide bracket (9). The guide bracket (9) includes a housing (901) and a guide rod (902). The lower end of the housing (901) is open and connected to the push rod of the electric cylinder (8). The upper end of the housing (901) abuts against the constant temperature heating module (100). The upper end of the guide rod (902) is connected to the housing (901), and the lower end of the guide rod (902) passes through the guide frame (7).

7. The air bath device according to any one of claims 1-5, characterized in that, The control module (400) includes a control box, a touch screen located in the control box, and control buttons located on the outside of the touch screen.

8. The air bath device according to any one of claims 1-5, characterized in that, It also includes a frame (500), a constant temperature heating module (100) set on the top of the frame (500), a lifting module (200) set inside the frame (500) and located below the constant temperature heating module (100), an alarm module (300) set on the frame (500) and connected to the constant temperature heating module (100), and a control module (400) set on the side of the frame (500).

9. The air bath device according to claim 8, characterized in that, The side of the frame (500) is provided with a maintenance door (10), at least one of which is provided with a push handle (11), and the bottom of the frame (500) is provided with casters (12).

10. A constant temperature equipment, characterized in that, The air bath device includes any one of claims 1-9.

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