PEO freeze dryer with vacuumizing structure

Abstract

The utility model relates to the technical field of processing equipment, in particular to a PEO freeze dryer with a vacuumizing structure, which comprises a freezer for freezing and drying PEO, and a vacuumizing box is mounted at the top of the freezer. According to the vacuum-pumping structure, the vacuum-pumping structure comprises the negative pressure vacuum pump arranged in the vacuum-pumping box and is communicated with the interior of the freezing cabinet through the vacuum-pumping pipe, so that the PEO freeze dryer can form a negative pressure environment in the freezing cabinet, and moisture in PEO materials is effectively promoted to quickly sublimate; a rubber magnetic ring in magnetic connection is utilized to ensure tight closing of the cabinet door, and air leakage in the vacuumizing process is prevented; the cabinet freezer adopts the design of an anti-collision outer shell and a heat preservation inner layer, so that the durability of equipment is enhanced, and the temperature stability in the freeze-drying process is also ensured; due to the arrangement of the multiple layers of shelves, the PEO materials can be reasonably placed according to the freeze drying requirements of different PEO materials, and the practicability and flexibility of the equipment are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to processing equipment technical field, concretely is PEO freeze dryer with vacuumizing structure. BACKGROUND

[0002] PEO (polyethylene oxide) freeze dryer is an advanced equipment, is specially used for removing the moisture in PEO and the like, and simultaneously keeping its original structure and activity. The equipment adopts freeze drying technology, through reducing the temperature of the substance to below the freezing point, makes its internal moisture change into ice crystal, then utilizes the sublimation principle of ice crystal under vacuum environment, directly converts solid ice into gaseous water vapor, thereby reaches the purpose of removing the moisture in material. This technology has been widely applied in multiple fields with its characteristics of being able to keep the original structure and active ingredients of the substance to the maximum extent. The existing PEO freeze dryer can lack efficient vacuumizing structure, since the freeze drying process involves multiple stages, including pre-freezing, sublimation and secondary drying, therefore the whole drying process time is relatively long, usually needs several hours or even longer time. SUMMARY

[0003] The utility model discloses a PEO freeze dryer with vacuumizing structure, to solve the problem of lacking vacuumizing and low processing efficiency of the existing PEO freeze dryer in the above background technology.

[0004] To achieve the above object, the utility model provides the following technical scheme:

[0005] PEO freeze dryer with vacuumizing structure, including the freeze cabinet for PEO freeze drying, the top of freeze cabinet is equipped with vacuumizing box, one side of freeze cabinet is open and the open side is connected with the sealing cabinet door through the hinge, install several layers of shelf in freeze cabinet,

[0006] The freeze cabinet includes an anti-collision outer shell and a thermal insulation inner layer.

[0007] The sealing cabinet door and the freeze cabinet both edges are provided with the rubber magnetic attraction ring of magnetic connection.

[0008] The vacuumizing box is built-in negative pressure vacuum pump, the gas suction end of negative pressure vacuum pump is connected with the inside of freeze cabinet through vacuumizing pipe, and the end of vacuumizing pipe is provided with the connecting flange for fixing on the outer wall of freeze cabinet.

[0009] As preferred, the outer wall of the freeze cabinet is embedded with a liquid crystal display screen for displaying internal temperature and air pressure data.

[0010] As preferred, the bottom of the freeze cabinet is provided with four moving wheels at the four corners.

[0011] As preferred, a transparent observation window is arranged at the center of the sealing cabinet door.

[0012] As preferred, the top surface and the bottom surface of each set of the shelves are embedded with electric heating sheets.

[0013] As preferred, a protective cover is arranged on the outer wall of the negative pressure vacuum pump.

[0014] As preferred, a control switch for controlling the start and stop of the negative pressure vacuum pump is installed on the outer wall of the protective cover.

[0015] Compared with the prior art, the present utility model has the beneficial effects that:

[0016] In the PEO freeze dryer with the vacuum extraction structure, the vacuum extraction structure is arranged, including the negative pressure vacuum pump arranged in the vacuum extraction box and the design of the vacuum extraction pipe connected with the inside of the freezing cabinet, so that the PEO freeze dryer can form a negative pressure environment in the freezing cabinet, effectively promoting the rapid sublimation of water in the PEO material; the rubber magnetic attraction ring connected magnetically ensures the close closing of the cabinet door to prevent air leakage during the vacuum extraction process; the anti-collision outer shell and the heat preservation inner layer design of the freezing cabinet not only enhance the durability of the equipment, but also ensure the temperature stability during the freeze drying process; and the arrangement of the multi-layer shelves facilitates reasonable placement according to the freeze drying requirements of different PEO materials, improving the practicality and flexibility of the equipment.

[0017] In the PEO freeze dryer with the vacuum extraction structure, the liquid crystal display screen for displaying the internal temperature and pressure data is embedded on the outer wall of the freezing cabinet, so that the user can intuitively view the temperature and pressure data in the freezing cabinet. This provides the basis for real-time monitoring and adjustment for the user, ensuring accurate control of the PEO freeze drying process.

[0018] In the PEO freeze dryer with the vacuum extraction structure, the mobile wheels are installed at the four top corners of the bottom of the freezing cabinet, so that the entire PEO freeze dryer can be easily moved and positioned. This not only improves the flexibility of the equipment, but also facilitates the use of the user in different working environments. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification, and are used to make a further detailed explanation together with the embodiments of the present utility model, but do not constitute a limitation on the present utility model.

[0020] Fig. 1 It is a structural schematic diagram of the present utility model;

[0021] Fig. 2 It is a sectional structure schematic diagram of the freezing cabinet of the present utility model;

[0022] Fig. 3The cross section structure schematic view of the shelf plate of the utility model;

[0023] 10, freezer; 11, LCD; 12, anti-collision outer shell; 13, heat preservation inner layer; 14, moving wheel;

[0024] 20, sealed cabinet door; 21, rubber magnetic ring; 22, transparent observation window;

[0025] 30, shelf plate; 31, electric heating sheet;

[0026] 40, vacuumizing box; 41, control switch; 42, vacuumizing pipe; 43, connecting flange; 44, negative pressure vacuum pump; 45, protective cover. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the embodiments of the utility model and the drawings in the specification. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0028] In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "center", "vertical", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like is the orientation or position relationship shown based on the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0029] PEO freeze dryer with vacuumizing structure, such as Figs. 1-3As shown, the PEO freeze-drying device includes a freezing cabinet 10, a vacuum box 40 mounted on the top of the freezing cabinet 10, a sealing cabinet door 20 hingedly connected to the open side of the freezing cabinet 10, and several layers of shelves 30 installed in the freezing cabinet 10. The freezing cabinet 10 comprises an anti-collision outer shell 12 and a heat-insulating inner layer 13. The edges of the sealing cabinet door 20 and the freezing cabinet 10 are both provided with magnetically connected rubber magnetic rings 21. The vacuum box 40 is internally provided with a negative pressure vacuum pump 44, and the gas suction end of the negative pressure vacuum pump 44 is connected in communication with the inside of the freezing cabinet 10 through a vacuum pipe 42. The end of the vacuum pipe 42 is provided with a connecting flange 43 for fixing to the outer wall of the freezing cabinet 10. Through the vacuum structure, including the negative pressure vacuum pump 44 internally provided in the vacuum box 40 and the design of the vacuum pipe 42 connected in communication with the inside of the freezing cabinet 10, the PEO freeze-drying device can form a negative pressure environment inside the freezing cabinet 10, effectively promoting the rapid sublimation of water in the PEO material. The magnetically connected rubber magnetic rings 21 ensure the tight closing of the cabinet door, preventing air leakage during the vacuum process. The anti-collision outer shell 12 and the heat-insulating inner layer 13 not only enhance the durability of the equipment, but also ensure the temperature stability during the freeze-drying process. The multi-layer shelves 30 are arranged to meet the freeze-drying requirements of different PEO materials, improving the practicality and flexibility of the equipment.

[0030] Further, a liquid crystal display screen 11 for displaying internal temperature and pressure data is embedded on the outer wall of the freezing cabinet 10, so that users can intuitively view the temperature and pressure data inside the freezing cabinet. This provides a basis for real-time monitoring and adjustment for users, ensuring accurate control of the PEO freeze-drying process.

[0031] Among them, the bottom four corners of the freezing cabinet 10 are each provided with a mobile wheel 14, so that the entire PEO freeze-drying device can be easily moved and positioned. This not only improves the flexibility of the equipment, but also facilitates the use of users in different working environments.

[0032] It is worth noting that the center of the sealing cabinet door 20 is provided with a transparent observation window 22, so that users can observe the material state inside the freezing cabinet without opening the cabinet door. This not only ensures the convenience of operation, but also avoids temperature fluctuations caused by frequent opening and closing of the cabinet door.

[0033] Specifically, the top surface and the bottom surface of each group of shelves 30 are embedded with electric heating sheets 31, so that the shelves can be uniformly heated to provide a stable heat source for the PEO material, which helps to speed up the drying process of the material and improve the drying efficiency and quality.

[0034] In addition, the outer wall of the negative pressure vacuum pump 44 is provided with a protective cover 45, and the outer wall of the protective cover 45 is provided with a control switch 41 for controlling the start and stop of the negative pressure vacuum pump 44, so that the negative pressure vacuum pump is effectively protected and conveniently controlled. The protective cover 45 can protect the pump body and prolong the service life of the pump; and the control switch 41 enables the user to start and stop the negative pressure vacuum pump at any time according to the needs, so as to realize flexible operation of the equipment.

[0035] The working principle of the PEO freeze dryer with the vacuum pumping structure is as follows:

[0036] Firstly, the freezing cabinet 10 is moved to a suitable position through the moving wheel 14; the sealing cabinet door 20 is opened, and the PEO to be freeze-dried is placed on the shelf 30, and the electric heating sheet 31 on the top surface and the bottom surface of the shelf 30 can assist the drying process; the sealing cabinet door 20 is closed, and the sealing property of the cabinet door is ensured through the rubber magnetic ring 21;

[0037] Then, the negative pressure vacuum pump 44 is started through the control switch 41, and the negative pressure vacuum pump 44 performs vacuum pumping operation on the inside of the freezing cabinet 10 through the vacuum pumping pipe 42 and the connecting flange 43; during the vacuum pumping process, the temperature and pressure data in the inside of the freezing cabinet 10 can be observed through the liquid crystal display screen 11;

[0038] During the freeze-drying process, the drying condition of the internal PEO can be observed through the transparent observation window 22 on the sealing cabinet door 20;

[0039] When the freeze-drying is completed, the negative pressure vacuum pump 44 is turned off through the control switch 41, the sealing cabinet door 20 is opened, and the PEO that has completed the freeze-drying is taken out; during the whole process, the protective cover 45 of the vacuum pumping box 40 can protect the negative pressure vacuum pump 44, and ensure the normal operation of the equipment.

[0040] The basic principle, main characteristics and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only preferred examples of the present application and do not limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. PEO freeze dryer with vacuum extraction, comprising a freeze cabinet (10) for PEO freeze drying, characterized in that: The top of the freezer cabinet (10) is provided with a vacuum box (40), one side of the freezer cabinet (10) is provided with an opening, and the opening side is provided with a sealing cabinet door (20) connected through a hinge, and a plurality of layers of shelves (30) are arranged in the freezer cabinet (10); The freezer cabinet (10) comprises an anti-collision outer shell (12) and a heat preservation inner layer (13); The sealing cabinet door (20) and the freezer cabinet (10) are both provided with a rubber magnetic ring (21) connected through magnetism at the edges thereof; The vacuum box (40) is provided with a negative pressure vacuum pump (44) arranged therein, the gas suction end of the negative pressure vacuum pump (44) is connected with the inside of the freezer cabinet (10) through a vacuum pipe (42), and the end of the vacuum pipe (42) is provided with a connecting flange (43) used for being fixed to the outer wall of the freezer cabinet (10).

2. The PEO freeze-dryer with vacuum-pumping structure according to claim 1, characterized in that: The outer wall of the freezer cabinet (10) is embedded with a liquid crystal display screen (11) used for displaying internal temperature and air pressure data.

3. The PEO freeze-dryer with vacuum-pumping structure according to claim 1, characterized in that: The bottom of the freezer cabinet (10) is provided with four movable wheels (14) arranged at the four top corners thereof.

4. The PEO freeze-dryer with vacuum-pumping structure according to claim 1, characterized in that: The center of the sealing cabinet door (20) is provided with a transparent observation window (22).

5. The PEO freeze-dryer with vacuum-pumping structure according to claim 1, characterized in that: The top surface and the bottom surface of each group of shelves (30) are embedded with electric heating sheets (31).

6. The PEO freeze-dryer with vacuum-pumping structure according to claim 1, characterized in that: The outer wall of the negative pressure vacuum pump (44) is provided with a protective cover (45).

7. The PEO freeze-dryer with vacuum extraction according to claim 6, characterized in that: The outer wall of the protective cover (45) is provided with a control switch (41) used for controlling the start and stop of the negative pressure vacuum pump (44).

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