Sight glass air knife demisting device for pulsating vacuum drier
By installing a scraper and air knife defogging assembly on the observation window of the pulsed vacuum dryer, the problem of fog obstructing the view of the observation window is solved by scraping and blowing away the fog, thus enabling clear observation of the internal equipment of the dryer.
Patent Information
- Application Number
- CN202422810243.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-18
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-11-18
AI Technical Summary
Existing pulsed vacuum dryers often experience fogging inside the observation window, obstructing the view during operation.
It employs a defogging assembly, including a scraper, drive unit, air knife, air inlet pipe, control valve, and pressurization unit, to achieve clear visibility by scraping and blowing away fog.
It effectively removes fog from the observation window, ensuring that users can clearly observe the operation of the internal equipment of the dryer and avoid obstruction of vision.
Smart Images
Figure CN223550764U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of drying equipment technology, and in particular to a sight glass air knife demisting device for a pulsed vacuum dryer. Background Technology
[0002] The pulsed vacuum dryer is a drying equipment widely used in pharmaceutical, chemical and other fields.
[0003] Existing pulsed vacuum dryers generally include a pulsed air intake device, a vacuum pump, a drying chamber, and a control system. Materials are placed in the drying chamber on drying trays. The pulsed vacuum dryer uses the vacuum pump to extract air and moisture while simultaneously heating the materials, creating a vacuum within the drying chamber. This lowers the boiling point of water and accelerates the drying process. When the vacuum level inside the drying chamber reaches the saturation pressure for moisture and the materials have absorbed heat to achieve efficient foaming, dry compressed gas is intermittently introduced into the drying chamber through the pulsed air intake device. This gas carries the water vapor from the drying chamber and is quickly expelled from the vacuum pump's exhaust port, achieving rapid drying. An observation window is also provided on the drying chamber to facilitate user monitoring of the internal equipment's operation.
[0004] However, because a large amount of high-temperature water vapor exists inside the pulsed vacuum dryer when it is working, this water vapor will condense into fog on the inside of the observation window and obstruct the view.
[0005] Therefore, there is a need to provide a sight glass air knife demisting device for a pulsed vacuum dryer. Utility Model Content
[0006] To address the problem of fog obstructing the view inside the observation window of existing pulsed vacuum dryers, this application provides a sight glass air knife defogging device for pulsed vacuum dryers.
[0007] This application provides a sight glass air knife defogging device for a pulsed vacuum dryer, which adopts the following technical solution: it includes a defogging component, which can remove fog from the side window facing the inside of the drying chamber on the observation window.
[0008] By adopting the above technical solution, the defogging component can remove the fog on the side of the observation window facing the inside of the drying chamber, so that users can easily observe the operation of the equipment inside the pulsed vacuum dryer through the observation window, and there will be no obstruction of vision caused by fogging of the window located inside the drying chamber.
[0009] Specifically, the defogging assembly includes a scraper and a driving device. One end of the scraper is hinged to the middle of the observation window, and the blade of the scraper can abut against the side of the observation window facing the inside of the drying chamber.
[0010] The drive device is connected to the scraper and can drive the scraper to rotate around its own axis.
[0011] By adopting the above technical solution, the driving device can drive the scraper to rotate around its own axis, so as to scrape off the fog on the window of the observation window located inside the drying chamber.
[0012] Furthermore, the driving device is a handle, and a connecting hole is provided in the middle of the observation window. The hinge shaft of the scraper passes through the connecting hole and is connected to the handle.
[0013] By adopting the above technical solution, users can drive the scraper to rotate by holding and selecting the handle.
[0014] Specifically, the demisting assembly includes a demisting element, an air inlet pipe, and a control valve. The demisting element is located inside the drying chamber and has an air inlet and an air outlet. The air outlet faces the side of the observation window that is closer to the inside of the drying chamber.
[0015] One end of the air inlet pipe is connected to the air inlet, and the other end of the air inlet pipe extends out of the drying box through a through hole.
[0016] The control valve is located on the air inlet pipe and can control the opening and closing of the air inlet pipe.
[0017] By adopting the above technical solution, when the control valve is opened, the outside gas will be affected by the negative pressure inside the drying chamber and enter the air inlet pipe. It will then pass through the air inlet pipe and be blown from the air outlet of the demisting component to the side window of the observation window near the inside of the drying chamber. This allows the outside cold air to blow away the fog on the observation window, thus achieving cold air demisting.
[0018] Furthermore, the demisting component is an air knife.
[0019] By adopting the above technical solution, the cold air from the outside will be compressed into a sheet-like high-speed airflow when passing through the air knife, which can enhance the defogging effect of the defogging component.
[0020] Furthermore, the demisting assembly also includes a pressurization unit, which is connected to one end of the air inlet pipe that extends to the outside of the drying chamber and is capable of inputting gas into the air inlet pipe.
[0021] By adopting the above technical solution, the pressurization unit can input gas into the air inlet pipe, so that the defogging component can blow a strong airflow onto the side of the observation window near the inside of the drying chamber, thereby shortening the time required for the fog on the observation window to dissipate, thus ensuring a good cold air defogging effect.
[0022] Furthermore, the pressurization unit includes an airbag, a base, a first one-way valve, and a second one-way valve. The airbag is disposed on the base and forms an air storage chamber between the two. The air storage chamber has an air inlet and an air outlet opening on its wall to the outside.
[0023] The first one-way valve is located inside the air inlet and can restrict the gas in the gas storage chamber from flowing through the air inlet to the outside.
[0024] The air outlet is connected to one end of the air inlet pipe that extends to the outside of the drying chamber. The second one-way valve is located in the air outlet and can restrict the gas in the air inlet pipe from passing through the air outlet into the gas storage chamber.
[0025] By adopting the above technical solution, after the control valve is opened, the user can compress the airbag to reduce the volume of the air storage chamber, so that the gas in the air storage chamber can pass through the air outlet and the second one-way valve into the air inlet pipe and finally blow the fog from the demister onto the observation window; after the user releases the airbag, the outside gas will pass through the air inlet and the first one-way valve into the air inlet pipe, so that the air storage chamber can return to its original volume before being compressed.
[0026] Furthermore, the pressurization unit also includes a limiting post and an elastic element. A limiting hole is formed on the base. One end of the limiting post is connected to the side of the airbag away from the base, and the other end of the limiting post is inserted into the limiting hole and can slide along the inner wall of the limiting hole.
[0027] The elastic element is disposed between the inner wall of the limiting post and the limiting hole and is capable of applying a force away from the base to the limiting post.
[0028] By adopting the above technical solution, the elastic element can apply a force away from the base to the limiting post, so that the gas storage cavity can recover to its original volume more quickly.
[0029] In summary, this application includes the following beneficial technical effects:
[0030] It includes a defogging component, which can remove fog from the side of the observation window facing the inside of the drying chamber, so that users can clearly observe the operation of the equipment inside the pulsed vacuum dryer through the observation window without obstructing the view due to fogging of the window located inside the drying chamber. Attached Figure Description
[0031] Figure 1 This is a perspective view of the first embodiment of this application;
[0032] Figure 2 It is along Figure 1A schematic cross-sectional view of the central axis of the demisting unit, showing only part of the enclosure door;
[0033] Figure 3 This is a perspective view of the second embodiment of this application;
[0034] Figure 4 It is along Figure 3 A schematic cross-sectional view taken along the central axis of the central air inlet duct, where the equipment inside the drying chamber is not shown;
[0035] Figure 5 yes Figure 4 A schematic enlarged view of area A in the middle, showing the demister;
[0036] Figure 6 This is a perspective view of the third embodiment of this application;
[0037] Figure 7 It is along Figure 6 A schematic cross-sectional view taken along the central axis of the airbag, showing only part of the door.
[0038] Reference numerals: 1. Drying oven; 11. Door; 2. Observation window; 3. Demisting assembly; 31. Scraper; 32. Drive unit; 33. Demisting component; 34. Air inlet pipe; 35. Control valve; 36. Pressurization unit; 361. Airbag; 362. Base; 3621. Air inlet; 3622. Air outlet; 363. First one-way valve; 364. Second one-way valve; 365. Limiting post; 366. Elastic component. Detailed Implementation
[0039] Figure 1 This is a perspective view of the first embodiment of this application. Figure 2 It is along Figure 1 A schematic cross-sectional view taken along the central axis of the demisting unit, showing only a portion of the enclosure door. See also... Figure 1 and Figure 2The drying chamber 1 of the pulsed vacuum dryer has a circular observation window 2 on its door 11. In the first embodiment, the demister for the pulsed vacuum dryer provided in this application includes a demister assembly 3 installed on the observation window 2. The demister assembly 3 includes a scraper 31 and a drive device 32. One end of the scraper 31 is hinged to the center of the circular observation window 2. The blade of the scraper 31 can abut against the side of the observation window 2 facing the inside of the drying chamber 1. The drive device 32 is a handle. A connection hole is provided in the middle of the observation window 2. The hinge shaft of the scraper 31 passes through the connection hole and is connected to the handle, so that the user can drive the scraper 31 to rotate by holding and selecting the handle, and then scrape off the fog on the window of the observation window 2 located inside the drying chamber 1 by the scraper 31. This allows the user to easily observe the operation of the equipment inside the pulsed vacuum dryer through the observation window 2, and there will be no obstruction of vision caused by fogging of the window of the observation window 2 located inside the drying chamber 1.
[0040] Specifically, the scraper 31 can be a silicone scraper 31 that is not easy to damage the surface of the observation window 2.
[0041] Figure 3 This is a perspective view of the second embodiment of this application. Figure 4 It is along Figure 3 A schematic cross-sectional view taken along the central axis of the central air inlet duct, where the equipment inside the drying chamber is not shown. Figure 5 yes Figure 4 A schematic enlarged view of area A in the middle, showing the demister. See also... Figure 3 , Figure 4 and Figure 5 In the second embodiment, the defogging assembly 3 includes a defogging element 33, an air inlet pipe 34, and a control valve 35. The defogging element 33 is an air knife, the air outlet of which faces the side window of the observation window 2 near the inside of the drying chamber 1. The air inlet of the air knife is connected to one end of the air inlet pipe 34, and the other end of the air inlet pipe 34 extends out of the drying chamber 1 through a through hole. The control valve 35 can be a mechanical pipe valve, which can control the flow of air in the air inlet pipe 34. Since the drying chamber 1 of the pulsed vacuum dryer is under negative pressure during operation, when the control valve 35 is opened, the outside air will be affected by the negative pressure inside the drying chamber 1 and enter the air inlet pipe 34. It will then pass through the air inlet pipe 34 and be blown from the air outlet of the defogging element 33 towards the side window of the observation window 2 near the inside of the drying chamber 1, so that the fog on the observation window 2 can be blown away by the outside cold air, thus achieving cold air defogging.
[0042] Figure 6 This is a perspective view of the third embodiment of this application. Figure 7 It is along Figure 6 A schematic cross-sectional view taken along the central axis of the airbag, showing only a portion of the door. See also Figure 6 and Figure 7 In the third embodiment, compared to the second embodiment, the demisting assembly 3 further includes a pressurization unit 36. The pressurization unit 36 includes a base 362, an airbag 361, a first one-way valve 363, a second one-way valve 364, a limiting post 365, and an elastic element 366. The base 362 is mounted on the door 11 of the drying chamber 1. The airbag 361 covers the top of the base 362 and forms an air storage chamber between the airbag 361 and the base 362. The airbag 361 can be made of a material such as rubber that can undergo elastic deformation. An air inlet 3621 and an air outlet 3622 are provided on the base 362. Both the air inlet 3621 and the air outlet 3622 are connected to the inside of the air storage chamber and the outside. The first one-way valve 363 is located at the air inlet 3621. The system can restrict the flow of gas in the storage chamber through the air inlet 3621 to the outside; the air outlet 3622 is connected to one end of the air inlet pipe 34 that extends to the outside of the drying chamber 1; the second one-way valve 364 is located in the air outlet 3622 and can restrict the gas in the air inlet pipe 34 from entering the storage chamber through the air outlet 3622; a limiting hole is also opened vertically on the top of the base 362; the top end of the limiting post 365 is connected to the side of the airbag 361 away from the base 362; the bottom end of the limiting post 365 is inserted into the limiting hole and can slide along the inner wall of the limiting hole; the elastic element 366 can be a compression spring, which is located between the limiting post 365 and the inner wall of the limiting hole and can apply a force away from the base 362 to the limiting post 365.
[0043] It should be noted that in the second embodiment of this application, because the pulsed air intake device of the pulsed vacuum dryer intermittently introduces dry compressed gas into the drying chamber 1 during drying, the pressure difference between the inside of the drying chamber 1 and the outside will constantly change. When the user opens the control valve 35 when the pressure difference is small, the air blown from the air knife to the observation window 2 will be relatively weak, and thus cannot remove the fog on the observation window 2 in a short time. In the third embodiment of this application, the user can reduce the volume of the air storage chamber by pressing down the air bag 361, so that the gas in the air storage chamber can quickly pass through the air outlet 3622 and the second one-way valve 36. 4. The mist enters the air inlet pipe 34 and is eventually blown at high speed from the air knife onto the observation window 2. After the user releases the air bag 361, the elastic element 366 can apply a force away from the base 362 to the limiting post 365, so that the outside gas will pass through the air inlet 3621 and the first one-way valve 363 into the air inlet pipe 34, thereby allowing the air storage chamber to return to its volume before compression. Then, the user can generate a high-speed cold airflow that blows towards the observation window 2 by repeatedly pressing the air bag 361, ensuring that the diaphragm air knife demisting device for the pulsed vacuum dryer can have a good demisting effect even when the pressure difference between the inside of the drying chamber 1 and the outside is small.
[0044] The working principle of the sight glass air knife demisting device for the pulsed vacuum dryer in this application is as follows:
[0045] Users can use the defogging components 3 such as scraper 31, air knife and airbag 361 to remove the fog on the side of the window facing the inside of the drying chamber 1 on the observation window 2, so that users can easily observe the operation of the equipment inside the pulse vacuum dryer through the observation window 2, and there will be no obstruction of vision caused by fogging of the window 2 located inside the drying chamber 1.
[0046] It should be noted that the above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A sight glass air knife demisting device for a pulsed vacuum dryer, installed on the observation window (2) of the drying chamber (1) of the pulsed vacuum dryer, characterized in that: Includes a defogging assembly (3), which is capable of removing fog from the side of the observation window (2) facing the inside of the drying chamber (1); The defogging assembly (3) includes a scraper (31) and a drive device (32). One end of the scraper (31) is hinged to the middle of the observation window (2). The blade of the scraper (31) can abut against the side of the observation window (2) facing the inside of the drying chamber (1). The drive device (32) is connected to the scraper (31) and can drive the scraper (31) to rotate around its own axis.
2. The sight glass air knife demisting device for a pulsed vacuum dryer according to claim 1, characterized in that: The drive device (32) is a handle, and a connection hole is provided in the middle of the observation window (2). The hinge of the scraper (31) passes through the connection hole and is connected to the handle.
3. The sight glass air knife demisting device for a pulsed vacuum dryer according to claim 1, characterized in that: The demisting assembly (3) includes a demisting element (33), an air inlet pipe (34), and a control valve (35). The demisting element (33) is located inside the drying chamber (1) and has an air inlet and an air outlet. The air outlet faces the side of the observation window (2) near the inside of the drying chamber (1). One end of the air inlet pipe (34) is connected to the air inlet, and the other end of the air inlet pipe (34) extends out of the drying box (1) through the through hole opened on the drying box (1); The control valve (35) is located on the air inlet pipe (34) and can control the opening and closing of the air inlet pipe (34).
4. The sight glass air knife demisting device for a pulsed vacuum dryer according to claim 3, characterized in that: The demisting component (33) is an air knife.
5. The sight glass air knife demisting device for a pulsed vacuum dryer according to claim 3, characterized in that: The demisting assembly (3) also includes a pressurizing unit (36), which is connected to one end of the air inlet pipe (34) that extends to the outside of the drying chamber (1) and is able to input gas into the air inlet pipe (34).
6. The sight glass air knife demisting device for a pulsed vacuum dryer according to claim 5, characterized in that: The pressurization unit (36) includes an airbag (361), a base (362), a first one-way valve (363), and a second one-way valve (364). The airbag (361) is disposed on the base (362) and forms an air storage chamber between the two. An air inlet (3621) and an air outlet (3622) are provided on the wall of the air storage chamber to the outside. The first one-way valve (363) is located in the air inlet (3621) and can restrict the gas in the gas storage chamber from flowing to the outside through the air inlet (3621); The air outlet (3622) is connected to one end of the air inlet pipe (34) that extends to the outside of the drying chamber (1). The second one-way valve (364) is located in the air outlet (3622) and can restrict the gas in the air inlet pipe (34) from passing through the air outlet (3622) into the gas storage chamber.
7. The sight glass air knife demisting device for a pulsed vacuum dryer according to claim 6, characterized in that: The pressurization unit (36) further includes a limiting post (365) and an elastic element (366). A limiting hole is provided on the base (362). One end of the limiting post (365) is connected to the side of the airbag (361) away from the base (362). The other end of the limiting post (365) is inserted into the limiting hole and can slide along the inner wall of the limiting hole. The elastic element (366) is disposed between the limiting post (365) and the inner wall of the limiting hole and is capable of applying a force away from the base (362) to the limiting post (365).