Constant-temperature stabilizing system of vacuum drying oven

Abstract

The utility model discloses a constant-temperature stabilizing system of a vacuum drying oven, which comprises a vacuum protective cover, a rectangular vacuum space, and an external space isolated by a sealing door, the heat circulation and diffusion device is transversely arranged in the vacuum space in a penetrating manner; the plurality of vacuum pumps are mounted on the bottom plate of the vacuum shield, and the vacuum pumps are downwards communicated with the air guide channel; and the inert gas filling pipeline is transversely mounted at the upper part of the vacuum space in the vacuum shield, and a gas port of the inert gas filling pipeline is mounted on the side wall of the vacuum shield. According to the constant-temperature stabilizing system of the vacuum drying oven, through optimization design and control strategies, the temperature uniformity is improved, the vacuum environment is rapidly established, the control stability is improved, and the quality and efficiency of drying and constant-temperature stabilizing can be improved.

Description

Technical Field

[0001] The utility model relates to a constant temperature stabilization system, in particular to a constant temperature stabilization system of a vacuum drying box. Background Art

[0002] A vacuum drying oven is a device used to dry and heat treat objects in a low-temperature, low-pressure environment. Normally, the air inside the drying oven is extracted to form a vacuum environment, and then the required temperature conditions are provided by controlling the heating system to dry or heat treat the object.

[0003] In the system to achieve constant temperature stability, the selection of vacuum pumps and the control of vacuum degree during air extraction are important. Common vacuum pumps include rotary vane vacuum pumps, screw vacuum pumps, etc., which can effectively extract air to form the required vacuum environment. At the same time, the constant temperature stability system relies on precise temperature control. Common temperature control technologies include a combination of PID control, temperature sensors and heaters. PID control continuously measures the temperature and adjusts the output of the heater so that the system can stabilize within the preset temperature range. In addition, the constant temperature stability system requires a reliable control system to monitor parameters such as temperature and vacuum degree, and control them according to preset conditions. The control system is usually implemented using a microprocessor or PLC (programmable logic controller), and the corresponding software algorithm is used to achieve stable control of temperature and vacuum.

[0004] The temperature uniformity of the constant temperature stabilization system of the traditional vacuum drying oven is insufficient. Because the heating elements and objects are unevenly distributed inside the drying oven, some objects are overheated while other parts are underheated, affecting the quality and efficiency of drying or heat treatment. Avoiding moisture accumulation can achieve the discharge of gas inside the box, thereby avoiding moisture accumulation inside the box and ensuring the drying of materials in the freeze drying oven. In response to these problems, it is urgent to improve the performance of the constant temperature stabilization system of the vacuum drying oven by improving the design and control strategy. Utility Model Content

[0005] In order to solve the deficiencies existing in the above-mentioned technology, the utility model provides a constant temperature stabilization system of a vacuum drying box.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is a constant temperature stabilization system of a vacuum drying oven, comprising:

[0007] Vacuum hood, a rectangular vacuum space, isolated from the outside space by a sealed door;

[0008] The heat circulation and diffusion device is arranged transversely in the vacuum space;

[0009] A plurality of vacuum pumps are installed on the bottom plate of the vacuum shield, and the vacuum pumps are connected downwardly to the air guide channel;

[0010] The inert gas filling pipeline is installed in the upper part of the vacuum space in the vacuum shield in the transverse direction, and the gas port of the inert gas filling pipeline is installed on the side wall of the vacuum shield.

[0011] Furthermore, the heat circulation and diffusion device includes a horizontal plate, which is arranged horizontally along the rectangular vacuum space in the vacuum shield, and has a plurality of circulation and diffusion channels running through it, and a plurality of groups of perforated plates are arranged vertically in parallel in the circulation and diffusion channels.

[0012] Furthermore, a plurality of vacuum pumps are vertically embedded in the bottom plate of the vacuum shield in a rectangular array, and the air inlet of the vacuum pump is trumpet-shaped and extends into the vacuum space of the vacuum shield.

[0013] Furthermore, a radiation shielding shell is matched outside the vacuum shield.

[0014] Furthermore, the upper opening area of ​​the air guiding channel gradually decreases downward, and the air guiding channel is arranged vertically.

[0015] Furthermore, the inert gas filling pipeline includes a main pipe and a sub-pipe, the diameter of the main pipe is larger than that of the sub-pipe, the main pipe is arranged along the X-axis direction, the sub-pipe is connected to the main pipe along the Z-axis, and the end of the sub-pipe forms a gas outlet.

[0016] Furthermore, the upper end portion of the flow diffusion channel is higher than the upper end surface of the transverse plate.

[0017] The utility model discloses a constant temperature stabilization system for a vacuum drying oven, which has the following advantages in solving the problems existing in the prior art: the arrangement of the circulation channel and the perforated plate in the heat circulation diffusion device can effectively improve the uniform distribution of temperature in the entire vacuum shield. This helps to avoid uneven temperature distribution, ensure that the object is heated evenly during the drying and heat treatment process, and improve the quality and efficiency of the drying and heat treatment. Through the rectangular array configuration of a plurality of vacuum pumps, combined with the design of the air guide channel, a relatively fast air extraction process can be achieved, thereby quickly establishing a vacuum environment. This helps to shorten the drying and heat treatment time and improve work efficiency. The arrangement of the inert gas filling pipeline can accurately control the oxygen content during the drying and heat treatment process. This helps to prevent the occurrence of oxidation reactions and protect the quality and characteristics of the object. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0019] Figure 2 It is a schematic diagram of the structure of the heat flow diffusion device.

[0020] Figure 3Schematic diagram of the structure of the perforated plate.

[0021] In the figure: 100, vacuum shield; 101, bottom plate; 200, heat circulation and diffusion device; 201, horizontal plate; 202, circulation and diffusion channel; 203, perforated plate; 300, vacuum pump; 400, air guide channel; 500, inert gas filling pipeline; 501, main pipe; 502, auxiliary pipe. DETAILED DESCRIPTION

[0022] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0023] like Figure 1 The constant temperature stabilization system of the vacuum drying oven shown is a device for drying and maintaining a constant temperature of an object in a low pressure environment, and includes a vacuum shield 100, a heat flow diffusion device 200, a vacuum pump 300, an air guide channel 400, and an inert gas filling pipeline 500;

[0024] The vacuum hood 100 is a rectangular vacuum space, which is isolated from the external space by a sealed door; therefore, the vacuum hood is a rectangular container, which is isolated from the external space by a sealed door to ensure that the internal space is in a vacuum state after evacuation.

[0025] The heat dissipation device 200 is an important component of the vacuum drying box and is arranged transversely in the vacuum space. The heat dissipation device 200 includes a transverse plate 201, which is arranged transversely along the rectangular vacuum space in the vacuum shield 100. The four edges of the transverse plate 201 are connected to the inner wall of the vacuum shield 100. The transverse plate 201 is penetrated by a plurality of Figure 2 The circulation diffusion channel 202 shown in the figure has a plurality of groups of Figure 3 The perforated plate 203 shown in the figure achieves uniform circulation and diffusion of heat through the transverse plate 201 and the circulation diffusion channel 202, effectively dividing the closed vacuum space. The heat circulation diffusion device 200 achieves uniform transverse and longitudinal circulation and diffusion of heat through the structural design of the transverse plate 201, the circulation diffusion channel 202 and the perforated plate 203. Its function is to ensure the temperature balance in the vacuum drying box, avoid uneven temperature distribution, improve the drying effect, and enable objects to be dried quickly and evenly at a constant temperature. The upper end of the circulation diffusion channel 202 is higher than the upper end surface of the transverse plate 201, so that the objects placed above the transverse plate will not block the entrance part of the circulation diffusion channel. This ensures that heat can freely enter the circulation diffusion channel and circulate and diffuse evenly in the entire vacuum space, thereby improving the drying effect.

[0026] A plurality of vacuum pumps 300 are installed on the bottom plate 101 of the vacuum shield 100. The vacuum pumps 300 are connected to the air guide channel 400 downwards. The upper opening area of ​​the air guide channel 400 gradually decreases downwards, and the air guide channel 400 is arranged vertically. A plurality of vacuum pumps 300 are vertically embedded in the bottom plate 101 of the vacuum shield 100 in a rectangular array. The air suction port of the vacuum pump 300 is trumpet-shaped and extends into the vacuum space of the vacuum shield 100. The function of the vacuum pump is to extract the air inside the shield and create a vacuum environment. The main function of the vacuum pump is to create a vacuum environment by extracting the air inside the vacuum shield. Through the operation of the vacuum pump, most or all of the gas is extracted, so that the pressure inside the vacuum shield is kept at a low level, thereby creating suitable drying or storage conditions. Since the trumpet-shaped air suction port of the vacuum pump extends into the vacuum space of the vacuum shield, the gas can be extracted more efficiently. In this way, a vacuum environment with a lower pressure can be quickly established, shortening the time of the drying and constant temperature process. Embedding a number of vacuum pumps in a rectangular array vertically on the bottom plate of the vacuum hood can improve the extraction efficiency of the vacuum pumps. By increasing the number of vacuum pumps, air can be extracted more quickly, further speeding up the creation of a vacuum environment. The design of the air guide channel extending downward and gradually narrowing helps guide the gas to flow smoothly to the vacuum pump. Since the air guide channel is set vertically, it can ensure that the gas from the top to the bottom of the vacuum hood can flow smoothly to the vacuum pump. This design helps to improve the working efficiency and extraction capacity of the vacuum pump, allowing the gas to be quickly discharged from the vacuum hood.

[0027] The inert gas filling pipeline 500 is installed in the upper part of the vacuum space in the vacuum shield 100 in the transverse direction, and the gas port of the inert gas filling pipeline 500 is installed on the side wall of the vacuum shield 100. The pipeline is installed in the upper part of the interior of the vacuum shield in the transverse direction, and the inert gas is filled through the gas port on the side wall. The filling of inert gas can effectively control the oxygen content in the drying process and avoid the occurrence of oxidation reaction. The inert gas filling pipeline 500 includes a main pipe 501 and a sub-pipe 502. The diameter of the main pipe 501 is larger than the diameter of the sub-pipe 502. The main pipe 501 is arranged along the X-axis direction, and the sub-pipe 502 is connected to the main pipe 501 along the Z-axis, and the end of the sub-pipe 502 forms a gas outlet.

[0028] In order to improve the anti-interference performance, a radiation shielding shell is matched outside the vacuum shield 100. It should be noted that under the vacuum state, the outlets of each component must be sealed.

[0029] When the system is working, the gas in the vacuum hood is first extracted through the vacuum pump group. After extraction, the circulation channel in the heat circulation and diffusion device will transfer the heat to the entire vacuum hood to maintain a stable temperature. In addition, the filling of inert gas also helps to maintain a constant temperature and avoid temperature fluctuations. The working principle of the entire system is to achieve drying and constant temperature preservation of objects through the circulation and diffusion of heat in a low-pressure vacuum environment, combined with the filling of inert gas. Specifically, the circulation channel in the heat circulation and diffusion device makes the heat evenly distributed, while the filling of inert gas controls the oxygen content in the atmosphere to prevent the occurrence of oxidation reactions. In this way, the vacuum drying oven can effectively dry and preserve objects under constant low temperature and low pressure conditions.

[0030] The constant temperature system of the vacuum drying oven can continuously and evenly control the temperature through the vacuum pump group and the inert gas filling, so as to minimize the temperature fluctuations experienced by the object during the drying and preservation process, thereby protecting the quality and characteristics of the object. Secondly, by creating a vacuum state, the system can effectively prevent oxidation and contamination, and extend the life of the object. In addition, the heat flow and diffusion device in the system can ensure that the heat is evenly distributed and improve the drying effect. Finally, the configuration of the vacuum cover can also prevent the external environment from interfering with the object and ensure the stability of the drying and constant temperature process.

[0031] The above implementation modes are not limitations of the present invention, and the present invention is not limited to the above examples. Any changes, modifications, additions or substitutions made by technicians in this technical field within the technical solution of the present invention also belong to the protection scope of the present invention.

Claims

1. A constant temperature stabilization system for a vacuum drying oven, characterized in that: include: The vacuum shield (100) is a rectangular vacuum space, which is isolated from the external space by a sealed door; A heat circulation and diffusion device (200) is arranged transversely in the vacuum space; A plurality of vacuum pumps (300) are installed on the bottom plate (101) of the vacuum shield (100), and the vacuum pumps (300) are downwardly connected to the air guide channel (400); The inert gas filling pipeline (500) is installed in the upper part of the vacuum space in the vacuum shield (100) in the transverse direction, and the gas port of the inert gas filling pipeline (500) is installed on the side wall of the vacuum shield (100).

2. The constant temperature stabilization system of the vacuum drying oven according to claim 1, characterized in that: The heat circulation and diffusion device (200) comprises a horizontal plate (201), the horizontal plate (201) being arranged horizontally along the rectangular vacuum space in the vacuum shield (100), a plurality of circulation and diffusion channels (202) passing through the horizontal plate (201), and a plurality of groups of perforated plates (203) being arranged vertically in parallel in the circulation and diffusion channels (202).

3. The constant temperature stabilization system of the vacuum drying oven according to claim 2, characterized in that: The plurality of vacuum pumps (300) are vertically embedded in a rectangular array on the bottom plate (101) of the vacuum shield (100); the air inlet of the vacuum pump (300) is trumpet-shaped and extends into the vacuum space of the vacuum shield (100).

4. The constant temperature stabilization system of the vacuum drying oven according to claim 3, characterized in that: The vacuum shield (100) is matched with a radiation shielding shell outside.

5. The constant temperature stabilization system of the vacuum drying oven according to claim 4, characterized in that: The upper opening area of ​​the air guide channel (400) gradually decreases downwards, and the air guide channel (400) is arranged in the vertical direction.

6. The constant temperature stabilization system of the vacuum drying oven according to claim 4, characterized in that: The inert gas filling pipeline (500) comprises a main pipe (501) and a sub-pipe (502); the diameter of the main pipe (501) is larger than the diameter of the sub-pipe (502); the main pipe (501) is arranged along the X-axis direction; the sub-pipe (502) is connected to the main pipe (501) along the Z-axis; and a gas outlet is formed at the end of the sub-pipe (502).

7. The constant temperature stabilization system of the vacuum drying oven according to claim 4, characterized in that: The upper end portion of the flow diffusion channel (202) is higher than the upper end surface of the transverse plate (201).

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