CN111288773A - Vacuum drying oven - Google Patents
Vacuum drying oven Download PDFInfo
- Publication number
- CN111288773A CN111288773A CN202010142247.2A CN202010142247A CN111288773A CN 111288773 A CN111288773 A CN 111288773A CN 202010142247 A CN202010142247 A CN 202010142247A CN 111288773 A CN111288773 A CN 111288773A
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- Prior art keywords
- locate
- pipeline
- way valve
- vacuum drying
- drying oven
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
- F26B11/18—Machines or apparatus for drying solid materials or objects with movement which is non-progressive on or in moving dishes, trays, pans, or other mainly-open receptacles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/08—Humidity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/06—Chambers, containers, or receptacles
- F26B25/14—Chambers, containers, receptacles of simple construction
- F26B25/18—Chambers, containers, receptacles of simple construction mainly open, e.g. dish, tray, pan, rack
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Molecular Biology (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a vacuum drying oven, which comprises a vacuum drying oven body, a vacuum drying oven door, an inner container, a vacuum drying oven, a drying rack, a heating pipe, a vacuum drying oven and an air exhaust pipeline, wherein the vacuum drying oven body is arranged in the vacuum drying oven body; the invention can ensure that the materials to be dried are uniformly heated in the drying box, thereby improving the drying efficiency.
Description
Technical Field
The invention relates to the technical field of drying ovens, in particular to a vacuum drying oven.
Background
The vacuum drying is heating drying of the material to be dried under vacuum condition, and is to utilize vacuum pump to exhaust air and dehumidify to form vacuum state in the working chamber, lower the boiling point of water, speed up drying, obtain high drying rate at lower temperature, utilize heat fully and have no impurity mixed in the drying process. The drying box is widely applied to low-temperature drying in the industries of medicine, food, light industry, chemical industry and the like, has the advantages of high speed of drying articles, small pollution and no damage to the inherent quality of the dried articles. The existing drying box has the defects of uneven local heating, poor drying effect and easy occurrence of the phenomenon that materials are scorched.
Disclosure of Invention
The invention provides a vacuum drying oven for overcoming the defects in the prior art, so that materials to be dried are uniformly heated in the drying oven, and the drying efficiency is improved.
In order to achieve the purpose, the invention adopts the following technical scheme: a vacuum drying oven comprises an oven body, an oven door, an inner container arranged in the oven body, a drying rack arranged on the inner container, heating pipes arranged on the inner wall of the inner container, and an air exhaust pipeline for air circulation in the oven body, wherein the drying rack comprises a rectangular slide rail, an inner tooth disc arranged on the outer side of the rectangular slide rail, a rotating shaft arranged at the center of the rectangular slide rail, a motor used for driving the rotating shaft to rotate, a plurality of gears movably arranged on the rectangular slide rail and meshed with the inner tooth disc, a plurality of telescopic rods with one ends sleeved on the gears and the other ends fixedly arranged on the rotating shaft, and a plurality of trays respectively fixedly arranged at the upper ends of the gears; the motor drives the main shaft to rotate, so that the telescopic rods are driven to rotate, one end of each telescopic rod is provided with a gear, the gear is driven to revolve, the gear is located on the rectangular slide rail, the gear moves along the rectangular slide rail, the telescopic rods can stretch out and draw back according to the change of the distance between the gear and the main shaft in the moving process of the gear along the rectangular slide rail, the tray is arranged on the gear, so that the tray is finally driven to revolve, the gear is meshed with the inner fluted disc, the gear revolves in the process of autobiography, namely, the tray revolves and simultaneously autobiography is carried out, materials on the iron tray can move while rotating when passing through the heating pipe, the air in the box body is circulated through the air exhaust pipeline, water vapor in the air exhaust pipeline is removed, and the air in. The invention drives the main shaft to rotate through the motor, thereby driving a plurality of telescopic rods to rotate, one end of each telescopic rod is provided with a gear, thereby enabling the gear to revolve, the gear is positioned on the rectangular slide rail, thereby the gear moves along the rectangular slide rail, the telescopic rods can extend and retract according to the change of the distance between the gear and the main shaft in the process of moving along the rectangular slide rail, thereby the gear can move along the rectangular slide rail, the gear is provided with a tray, thereby finally enabling the tray to revolve, the gear is meshed with the inner fluted disc, thereby the gear performs autobiography in the revolution process, namely the tray revolves and simultaneously performs autobiography, when passing through the heating pipe, the material positioned on the iron tray can move while rotating, so that the material can be dried in all directions, the local high temperature of the material is avoided, and the air in the box body is circulated through the air exhaust pipeline to, the drying of the air in the box body is guaranteed, and the drying efficiency is improved.
The drying rack also comprises a plurality of first rotating plates, a plurality of second rotating plates and a torsion spring, wherein one end of each first rotating plate is rotatably arranged on the plurality of gears, one end of each second rotating plate is rotatably arranged on the rotating shaft, one end of each torsion spring is fixedly arranged on the first rotating plate, the other end of each torsion spring is fixedly arranged on the second rotating plate, and the first rotating plates and the second rotating plates are rotatably arranged; the telescopic link is flexible in-process makes first commentaries on classics board and second change the board and then rotate, can play the additional action to the telescopic link, makes the telescopic link better stretch out and draw back along its flexible direction itself, avoids the telescopic link to drive gear revolve in-process telescopic link atress to cause the damage, and setting up of rethread torsional spring changes the board to first commentaries on classics board and second and resets, assists making its flexible that can be better promptly to the telescopic link.
The tray comprises a circular plate, a plurality of fixed blocks which are distributed on the circular plate in an equidistant annular mode, a moving rod which is movably arranged on the fixed blocks from the center of the circular plate to the outside, a spring, a ball, a plurality of arc-shaped through holes and a plurality of small balls, wherein one end of the spring is fixedly arranged at one end of the moving rod, the other end of the spring is fixedly arranged on the fixed block, the ball is rotatably arranged at the other end of the moving rod, the arc-shaped through holes are formed in the circular; the setting through carriage release lever and spring can be fixed the material, make the material be located the center part of plectane, the material is heated more evenly from passing the in-process, set up through the ball and make material and carriage release lever reduce wear, set up the rolling effect that improves between material and the plectane through a plurality of little balls on the plectane, make the thrust through the spring can make the material be located plectane center department promptly, make the material bottom can be heated through the arc through-hole on the plectane, the material drying effect has been improved once more, can avoid ponding on the plectane through little ball setting simultaneously, play the guide effect to the water on the plectane, even water can be quick through the arc through-hole.
The inner container comprises an upper conical plate, a lower conical plate, a plurality of first air holes formed in the upper conical plate, a plurality of conical convex blocks located on the outer wall of the upper conical plate and arranged at the air holes, and a plurality of second air holes formed in the upper conical plate; the upper conical plate is arranged to play a role in gathering vapor of vapor in the box body, most of the vapor enters through the upper port of the upper conical plate, and then a plurality of first air holes in the conical plate, a small part of the vapor enters the cavity of the upper conical plate through the first air holes, a certain suction force is provided for the inner wall of the upper conical plate to prevent the inner wall of the upper conical plate from being full of water drops, the suction force of the first air holes can be improved through the arrangement of the conical convex blocks, meanwhile, the water drops on the outer wall of the upper conical plate are prevented from reversely entering the first air holes, the vapor in the cavity above the upper conical plate enters the cavity below the lower conical plate through the air exhaust pipeline, then the vapor returns to the cavity between the upper conical plate and the lower conical plate through the second air holes in the upper conical plate, the vapor in the cavity between the upper conical plate and the lower conical plate is exhausted and diffused outwards through the second air holes in the upper conical plate, namely, the dry hot air in the upper conical plate and, the drying effect is improved again.
The air exhaust pipeline comprises a U-shaped pipeline and a straight pipeline, a first one-way valve fixedly arranged in the straight pipeline, a second one-way valve movably arranged in the straight pipeline below the first one-way valve, a third one-way valve fixedly arranged in the straight pipeline below the second one-way valve, a chute arranged on the inner wall of the straight pipeline, a sliding plate fixedly arranged on the second one-way valve along the chute in a moving way, an air cylinder used for driving the sliding plate to move up and down, an air-water filter screen arranged in the U-shaped pipeline, a liquid level measuring instrument arranged in the U-shaped pipeline, a drain pipe arranged at the bottom of the U-shaped pipeline and a control valve arranged on the drain pipe, wherein the liquid level measuring instrument is provided with a highest part and a lowest part, the control valve with the liquid level at the highest part is opened; the vapor above the upper conical plate firstly passes through the U-shaped pipeline, water drops can be accumulated at the bottom of the U-shaped pipeline through the design of the U-shaped pipeline, then the vapor is filtered through the vapor filter screen, dried hot gas enters the straight pipeline, the sliding plate is driven by the air cylinder to move up and down, the second one-way valve moves up and down, so that the hot gas in the straight pipeline sequentially passes through the first one-way valve, the second one-way valve and the third one-way valve and finally enters a cavity below the lower conical plate, the hot gas can only flow in one way through the arrangement of the first one-way valve, the second one-way valve and the third one-way valve, the control valve is opened when the liquid level of the water drops is at the highest position, the water in the U-shaped pipeline can be discharged, the control valve is closed when the liquid level of the water drops is at the lowest position, the discharge of the water in the U-shaped pipeline is stopped, the steam entering the U-shaped pipeline can be filtered by the water in the U-shaped pipeline, the water and the steam exchange heat, so that most of the steam can form water, the steam is pre-dried, the steam is filtered by the steam-water filter screen to form dried steam, and the highest position of the steam-water filter screen is arranged to prevent the water level from being positioned at the lower end of the steam-water filter screen to influence the filtering effect; the U-shaped pipeline and the straight pipeline are positioned between the upper conical plate and the lower conical plate, so that gas in the U-shaped pipeline and the straight pipeline can be preheated, and hot gas in the box body is more stable.
The invention has the following advantages: through the revolution of having realized the tray, gear and internal tooth dish meshing to make the gear revolution in-process carry out the biography of autobiography, the tray carries out the revolution simultaneously promptly and carries out the biography of autobiography, and the process that makes the material that is located on the iron pallet can be rotatory displacement when the heating pipe is passed through in this department simultaneously, makes the material can all-round drying, avoids the local high temperature of material, circulates through the air exhaust pipeline and gets rid of vapor wherein to the air in the box, guarantees the drying of air in the box, improves drying efficiency.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a side view of the present invention.
Fig. 3 is a structural sectional view taken along line a-a of fig. 2.
Fig. 4 is an enlarged view of a portion a in fig. 3.
Fig. 5 is a sectional view taken along line C-C of fig. 2.
Fig. 6 is a cross-sectional view taken along line D-D of fig. 5.
Fig. 7 is a sectional view taken along line E-E of fig. 5.
Fig. 8 is a schematic front view of the present invention.
Fig. 9 is a cross-sectional view of the mechanism taken along line B-B of fig. 8.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-9, a vacuum drying oven comprises an oven body 1 and an oven door 2, an inner container 3 disposed in the oven body, a drying rack 4 disposed on the inner container, a heating pipe 5 disposed on the inner wall of the inner container, and an air exhaust duct 6 for circulating air in the oven body, wherein the drying rack 4 comprises a rectangular slide rail 41, an inner toothed disc 42 disposed outside the rectangular slide rail, a rotating shaft 43 disposed at the center of the rectangular slide rail, a motor 44 for driving the rotating shaft to rotate, a plurality of gears 45 movably disposed on the rectangular slide rail and engaged with the inner toothed disc, a plurality of telescopic rods 46 with one end sleeved on the gears and the other end fixedly disposed on the rotating shaft, and a plurality of trays 47 respectively fixedly disposed at the upper ends of the plurality of gears; the drying rack 4 further comprises a plurality of first rotating plates 48, one ends of which are respectively rotatably arranged on the plurality of gears, a plurality of second rotating plates 49, one ends of which are rotatably arranged on the rotating shafts, and torsion springs 410, one ends of which are fixedly arranged on the first rotating plates and the other ends of which are fixedly arranged on the second rotating plates, wherein the first rotating plates and the second rotating plates are rotatably arranged; the tray 47 comprises a circular plate 471, a plurality of fixed blocks 472 which are distributed on the circular plate in an equidistant annular manner, a moving rod 473 which is movably arranged on the fixed blocks from the center of the circular plate to the outside, a spring 474 which is fixedly arranged at one end of the moving rod and is fixedly arranged on the fixed block at the other end, a ball 475 which is rotatably arranged at the other end of the moving rod, a plurality of arc-shaped through holes 476 arranged on the circular plate, and a plurality of small balls 477 which are arranged between two adjacent arc-shaped through holes and are arranged on the; the setting through carriage release lever and spring can be fixed the material, make the material be located the center part of plectane, the material is heated more evenly from passing the in-process, set up through the ball and make material and carriage release lever reduce wear, set up the rolling effect that improves between material and the plectane through a plurality of little balls on the plectane, make the thrust through the spring can make the material be located plectane center department promptly, make the material bottom can be heated through the arc through-hole on the plectane, the material drying effect has been improved once more, can avoid ponding on the plectane through little ball setting simultaneously, play the guide effect to the water on the plectane, even water can be quick through the arc through-hole. The telescopic link is flexible in-process makes first commentaries on classics board and second change the board and then rotate, can play the additional action to the telescopic link, makes the telescopic link better stretch out and draw back along its flexible direction itself, avoids the telescopic link to drive gear revolve in-process telescopic link atress to cause the damage, and setting up of rethread torsional spring changes the board to first commentaries on classics board and second and resets, assists making its flexible that can be better promptly to the telescopic link. The motor drives the main shaft to rotate, so that the telescopic rods are driven to rotate, one end of each telescopic rod is provided with a gear, the gear is driven to revolve, the gear is located on the rectangular slide rail, the gear moves along the rectangular slide rail, the telescopic rods can stretch out and draw back according to the change of the distance between the gear and the main shaft in the moving process of the gear along the rectangular slide rail, the tray is arranged on the gear, so that the tray is finally driven to revolve, the gear is meshed with the inner fluted disc, the gear revolves in the process of autobiography, namely, the tray revolves and simultaneously autobiography is carried out, materials on the iron tray can move while rotating when passing through the heating pipe, the air in the box body is circulated through the air exhaust pipeline, water vapor in the air exhaust pipeline is removed, and the air in. The invention drives the main shaft to rotate through the motor, thereby driving a plurality of telescopic rods to rotate, one end of each telescopic rod is provided with a gear, thereby enabling the gear to revolve, the gear is positioned on the rectangular slide rail, thereby the gear moves along the rectangular slide rail, the telescopic rods can extend and retract according to the change of the distance between the gear and the main shaft in the process of moving along the rectangular slide rail, thereby the gear can move along the rectangular slide rail, the gear is provided with a tray, thereby finally enabling the tray to revolve, the gear is meshed with the inner fluted disc, thereby the gear performs autobiography in the revolution process, namely the tray revolves and simultaneously performs autobiography, when passing through the heating pipe, the material positioned on the iron tray can move while rotating, so that the material can be dried in all directions, the local high temperature of the material is avoided, and the air in the box body is circulated through the air exhaust pipeline to, the drying of the air in the box body is guaranteed, and the drying efficiency is improved.
The inner container 3 comprises an upper conical plate 31, a lower conical plate 32, a plurality of first air holes 33 arranged on the upper conical plate, a plurality of conical lugs 34 positioned on the outer wall of the upper conical plate and arranged at the air holes, and a plurality of second air holes 35 arranged on the upper conical plate; the upper conical plate is arranged to play a role in gathering vapor of vapor in the box body, most of the vapor enters through the upper port of the upper conical plate, and then a plurality of first air holes in the conical plate, a small part of the vapor enters the cavity of the upper conical plate through the first air holes, a certain suction force is provided for the inner wall of the upper conical plate to prevent the inner wall of the upper conical plate from being full of water drops, the suction force of the first air holes can be improved through the arrangement of the conical convex blocks, meanwhile, the water drops on the outer wall of the upper conical plate are prevented from reversely entering the first air holes, the vapor in the cavity above the upper conical plate enters the cavity below the lower conical plate through the air exhaust pipeline, then the vapor returns to the cavity between the upper conical plate and the lower conical plate through the second air holes in the upper conical plate, the vapor in the cavity between the upper conical plate and the lower conical plate is exhausted and diffused outwards through the second air holes in the upper conical plate, namely, the dry hot air in the upper conical plate and, the drying effect is improved again.
The air extraction pipeline 6 comprises a U-shaped pipeline 61, a straight pipeline 62, a first one-way valve 63 fixedly arranged in the straight pipeline, a second one-way valve 64 positioned below the first one-way valve and movably arranged in the straight pipeline, a third one-way valve 65 positioned below the second one-way valve and fixedly arranged in the straight pipeline, a chute 66 arranged on the inner wall of the straight pipeline, a sliding plate 67 fixedly arranged on the second one-way valve along the chute in a moving way, an air cylinder 68 used for driving the sliding plate to move up and down, an air-water filter screen 69 arranged in the U-shaped pipeline, a liquid level measuring instrument 610 arranged in the U-shaped pipeline, a drain pipe 611 arranged at the bottom of the U-shaped pipeline and a control valve 612 arranged on the drain pipe, wherein the liquid level measuring instrument is provided with a highest part 613 and a lowest part 614, the control valve at the highest part is opened; the vapor above the upper conical plate firstly passes through the U-shaped pipeline, water drops can be accumulated at the bottom of the U-shaped pipeline through the design of the U-shaped pipeline, then the vapor is filtered through the vapor filter screen, dried hot gas enters the straight pipeline, the sliding plate is driven by the air cylinder to move up and down, the second one-way valve moves up and down, so that the hot gas in the straight pipeline sequentially passes through the first one-way valve, the second one-way valve and the third one-way valve and finally enters a cavity below the lower conical plate, the hot gas can only flow in one way through the arrangement of the first one-way valve, the second one-way valve and the third one-way valve, the control valve is opened when the liquid level of the water drops is at the highest position, the water in the U-shaped pipeline can be discharged, the control valve is closed when the liquid level of the water drops is at the lowest position, the discharge of the water in the U-shaped pipeline is stopped, the steam entering the U-shaped pipeline can be filtered by the water in the U-shaped pipeline, the water and the steam exchange heat, so that most of the steam can form water, the steam is pre-dried, the steam is filtered by the steam-water filter screen to form dried steam, and the highest position of the steam-water filter screen is arranged to prevent the water level from being positioned at the lower end of the steam-water filter screen to influence the filtering effect; the U-shaped pipeline and the straight pipeline are positioned between the upper conical plate and the lower conical plate, so that gas in the U-shaped pipeline and the straight pipeline can be preheated, and hot gas in the box body is more stable.
The motor is commercially available.
Claims (5)
1. The utility model provides a vacuum drying oven which characterized in that: including box (1) and chamber door (2), locate inner bag (3) in the box, locate stoving frame (4) on the inner bag, locate heating pipe (5) on the inner bag inner wall, be used for gas circulation's in the box exhaust duct (6), stoving frame (4) include rectangle slide rail (41), locate interior fluted disc (42) in the rectangle slide rail outside, locate pivot (43) of rectangle slide rail center department, be used for driving pivot pivoted motor (44), portable locate on the rectangle slide rail and with a plurality of gears (45) of interior fluted disc meshing, one end overlaps on the gear other end fixed locate a plurality of epaxial telescopic link (46), respectively fixed a plurality of trays (47) of locating a plurality of gears upper ends.
2. A vacuum drying oven according to claim 1, characterized in that: drying rack (4) still include that one end rotates respectively and locates a plurality of first commentaries on classics board (48) on a plurality of gears, one end rotate locate a plurality of second commentaries on classics board (49) of epaxial, one end is fixed locate first commentaries on classics board on the other end fixed locate torsional spring (410) on the second commentaries on classics board, first commentaries on classics board and second change and rotate the setting between the board.
3. A vacuum drying oven according to claim 1, characterized in that: the tray (47) comprises a circular plate (471), a plurality of fixing blocks (472) which are distributed on the circular plate in an equidistant annular mode, a moving rod (473) which is arranged on the fixing block in a movable mode from the center of the circular plate to the outside, a spring (474) with one end fixedly arranged at one end of the moving rod and the other end fixedly arranged on the fixing block, a ball (475) which is rotatably arranged at the other end of the moving rod, a plurality of arc-shaped through holes (476) arranged on the circular plate, and a plurality of small balls (477) which are located between every two adjacent arc-.
4. A vacuum drying oven according to claim 1, characterized in that: the inner container (3) comprises an upper conical plate (31), a lower conical plate (32), a plurality of first air holes (33) formed in the upper conical plate, a plurality of conical convex blocks (34) located on the outer wall of the upper conical plate and located at the air holes, and a plurality of second air holes (35) formed in the upper conical plate.
5. A vacuum drying oven according to claim 1, characterized in that: the air extraction pipeline (6) comprises a U-shaped pipeline (61), a straight pipeline (62), a first one-way valve (63) fixedly arranged in the straight pipeline, a second one-way valve (64) movably arranged in the straight pipeline below the first one-way valve, a third one-way valve (65) fixedly arranged in the straight pipeline below the second one-way valve, a chute (66) arranged on the inner wall of the straight pipeline, a sliding plate (67) fixedly arranged on the second one-way valve along the chute in a moving way, an air cylinder (68) used for driving the sliding plate to move up and down, an air water filter screen (69) arranged in the U-shaped pipeline, a liquid level measuring instrument (610) arranged in the U-shaped pipeline, a drain pipe (611) arranged at the bottom of the U-shaped pipeline and a control valve (612) arranged on, the liquid level measuring instrument is provided with a highest part (613) and a lowest part (614), the control valve of the liquid level at the highest part is opened, and the control valve of the liquid level at the lowest part is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010142247.2A CN111288773B (en) | 2020-03-04 | 2020-03-04 | Vacuum drying oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010142247.2A CN111288773B (en) | 2020-03-04 | 2020-03-04 | Vacuum drying oven |
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| Publication Number | Publication Date |
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| CN111288773A true CN111288773A (en) | 2020-06-16 |
| CN111288773B CN111288773B (en) | 2022-04-22 |
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Denomination of invention: A vacuum drying oven Effective date of registration: 20230818 Granted publication date: 20220422 Pledgee: Agricultural Bank of China Limited Shaoxing Shangyu sub branch Pledgor: Zhejiang Zhicheng Medical Equipment Co.,Ltd. Registration number: Y2023980052686 |
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