Freeze-drying machine for preparing chemical reagents

Abstract

The utility model discloses a freeze dryer for preparing chemical reagent relates to chemical reagent preparation technical field, aims at solving the problem of inconvenient reagent filling of existing freeze dryer, poor mobility, gravity imbalance, loud noise and inaccurate vacuum degree control. The freeze dryer includes the organism, vacuum device, refrigeration plant and control device, the organism bottom is equipped with the universal wheel with the brake function, and the freeze drying chamber is set up in the upper portion in the organism, and the freeze drying chamber is detachably provided with the freezing frame with the layered bearing disc, and the bearing disc is slidably connected through the linear slide rail pair and is provided with reagent bottle placing groove, and the independent cooling chamber and equipment room are set up in the lower portion of the organism in parallel, and the refrigeration plant is arranged in the cooling chamber, and the vacuum device's exhaust fan is arranged in the equipment room, and the stable structure of gravity is formed. The utility model improves reagent filling convenience and equipment moving stability, reduces the operation noise, can accurately control freeze drying chamber vacuum degree, guarantees chemical reagent freeze drying efficiency and quality.

Description

Technical Field

[0001] This application relates to the field of chemical reagent preparation technology, and in particular to a freeze dryer for preparing chemical reagents. Background Technology

[0002] The vacuum level control device of a freeze dryer is a key piece of equipment used to precisely control and adjust the internal vacuum level of the freeze dryer. By precisely controlling the vacuum level, the sublimation rate can be optimized, drying efficiency can be improved, and the structure and activity of the product can be protected. Because freeze drying technology can remove moisture from substances at low temperatures while maintaining their original structure and biological activity, it is widely used in pharmaceuticals, biological products, food and other fields. It mainly consists of a freeze drying chamber, a vacuum system, a refrigeration system and a control system.

[0003] In practical use, existing freeze dryers often have a large number of reagent bottles inside the freezer, containing reagents to be freeze-dried. However, filling the bottles is inconvenient, and the freeze dryer is difficult to move during use, often requiring manual removal and transport. While solutions with casters at the bottom have emerged, the unreasonable layout of each system, such as the compressor and vacuum pump, leads to an unbalanced center of gravity and makes movement difficult. Utility Model Content

[0004] To overcome the above-mentioned technical problems, this application provides a freeze dryer for preparing chemical reagents.

[0005] This application provides a freeze dryer for preparing chemical reagents, which adopts the following technical solution: A freeze dryer for preparing chemical reagents includes a body, a vacuum device, a refrigeration device, and a control device. The bottom of the body is fixedly equipped with casters with braking function. A freeze-drying chamber is formed within the body, and a detachable freezing rack for layering reagent bottles is installed within the freeze-drying chamber. The body also includes a separate cooling chamber and an equipment chamber. The refrigeration device is located in the cooling chamber, and the vacuum device includes an exhaust fan, which is fixedly installed in the equipment chamber. The cooling chamber and the equipment chamber are located side-by-side at the lower part of the body, with their bottoms at the same height. The freeze-drying chamber is located at the upper part of the body. The overall design of the body is a layered structure with a lower center of gravity.

[0006] By adopting the above technical solutions, on the one hand, the casters at the bottom of the machine body enable flexible movement of the equipment, and the braking function ensures stable fixation during use, solving the problem of poor mobility of existing freeze dryers; on the other hand, the layered structure design with a lower center of gravity, with the heavy-duty refrigeration unit and exhaust fan located at the bottom and the lightweight freeze-drying chamber located at the top, effectively avoids the problem of equipment center of gravity imbalance caused by unreasonable system layout, improves the overall stability of the equipment, and reduces vibration transmission during operation.

[0007] Furthermore, the machine body is provided with doors for sealing the cooling chamber, equipment chamber and freeze-drying chamber, and forms a first door, a second door and a third door.

[0008] By adopting the above technical solution, the special door can achieve independent sealing of each chamber, avoiding mutual interference of airflow and temperature between the cooling chamber, equipment chamber and freeze-drying chamber. At the same time, it facilitates maintenance operations on a single chamber, such as repairing the refrigeration unit and cleaning the freeze-drying chamber, thus improving the convenience of equipment maintenance.

[0009] Furthermore, the freezer rack is provided with several support trays spaced vertically inside, and the support trays are slidably connected to the freezer rack via linear slide rail pairs. The support trays are provided with multiple placement slots for positioning and installing reagent bottles.

[0010] By adopting the above technical solution, the design of the linear slide rail pair allows the carrier tray to be smoothly pushed and pulled, and the filling and removal of reagent bottles can be completed without removing the entire freezing rack, which greatly improves the convenience of reagent filling; the placement slot on the carrier tray can accurately position the reagent bottles, preventing the reagent bottles from tipping over due to vibration during the freeze-drying process and ensuring the stability of the reagent freeze-drying process.

[0011] Furthermore, the vacuum device also includes a housing, which is fixedly installed on the top of the machine body. A vacuum chamber is sealed inside the housing, and the vacuum chamber is connected to the suction end of the exhaust fan through a sealed pipe.

[0012] By adopting the above technical solutions, the outer shell can provide physical protection for the internal vacuum chamber, preventing external dust and collisions from damaging the vacuum components; the cooperation between the sealed pipe and the vacuum chamber can ensure the sealing of the air extraction process of the fan, reduce vacuum leakage, and provide a guarantee for the freeze-drying chamber to maintain a stable high vacuum environment.

[0013] Furthermore, the vacuum device also includes a three-way solenoid valve, which has three ports: a first port, a second port, and a third port. The first port is connected to the vacuum chamber via a dual-branch manifold, which consists of two branch pipes and a main pipe. One end of each branch pipe is connected to the vacuum chamber, and the other end of each branch pipe is connected to the main pipe. The vacuum device also includes a silencer box and a filter box. The silencer box is connected to the second port via a pipe, and the filter box is connected to the third port via a pipe.

[0014] By adopting the above technical solutions, the three-way solenoid valve can flexibly switch the airflow direction, providing pathway support for different working conditions such as vacuum pumping and vacuum degree adjustment; the dual-branch design of the dual-branch manifold can increase the connection area with the vacuum pumping box and improve the pumping efficiency; the setting of the silencer box and the filter box provides a structural basis for subsequent noise reduction and airflow filtration functions, respectively, and optimizes the overall performance of the vacuum system.

[0015] Furthermore, the silencer box is equipped with a silencer structure, and the silencer box is also connected to a silencer exhaust pipe. One end of the silencer exhaust pipe extends to the outside of the outer shell, and a first on / off solenoid valve is provided on the silencer exhaust pipe.

[0016] By adopting the above technical solutions, the silencing structure inside the silencing box can absorb the airflow noise during the operation of the vacuum system. The silencing exhaust pipe further guides the noise outward to reduce noise. The first opening and closing solenoid valve can accurately control the opening and closing of the exhaust pipe to avoid airflow leakage under unnecessary operating conditions, thus ensuring the sealing of the vacuum system while achieving noise reduction.

[0017] Furthermore, several layers of filter plates are arranged sequentially along the airflow direction inside the filter box, a second on / off solenoid valve is installed on the pipe between the filter box and the three-way solenoid valve, the filter box is sealed and connected to the freeze-drying chamber through a vacuum connection pipe, and a vacuum degree detection sensor is installed on the vacuum connection pipe.

[0018] By adopting the above technical solution, the multi-layer filter plate can filter the airflow entering the vacuum system step by step, removing impurities generated by reagent volatilization or tiny particles in the freeze-drying chamber, and preventing impurities from damaging the exhaust fan or clogging the pipes; the second opening and closing solenoid valve can control the opening and closing of the filter passage, and work with the vacuum degree detection sensor to monitor the vacuum degree of the freeze-drying chamber in real time, providing data support and passage control basis for subsequent precise adjustment of the vacuum degree of the freeze-drying chamber.

[0019] Furthermore, the control device includes an integrated controller, a touch screen, and an instrument panel, wherein the integrated controller is electrically connected to the touch screen, the instrument panel, the vacuum device, and the refrigeration device, respectively.

[0020] By adopting the above technical solutions, the integrated controller enables centralized control of the vacuum device and the refrigeration device. The touch screen facilitates parameter input by the operator, and the instrument panel can intuitively display the equipment's operating status, thereby improving the convenience and intelligence of equipment operation and reducing human error.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. The omnidirectional wheels with braking function solve the problem of inconvenient movement, the layered structure with the center of gravity shifted downward avoids imbalance, and the independent cabinet door ensures the sealing of each chamber and the convenience of maintenance, thus improving the overall experience of using and maintaining the equipment. 2. The sliding connection of the carrier tray simplifies the reagent filling process, the positioning slot prevents reagent bottles from tipping over, and the detachable freezing rack greatly reduces the operational difficulty in the reagent processing process, ensuring the safety and stability of chemical reagents during the freeze-drying process; 3. The combination of a three-way solenoid valve, filter box, and vacuum sensor allows for precise adjustment of the vacuum level in the freeze-drying chamber, ensuring the efficiency and quality of reagent freeze-drying. The design of the silencer box and silencer exhaust pipe effectively reduces equipment operating noise and improves the operating environment. At the same time, the filter box protects the vacuum system components and extends the service life of the equipment. Attached Figure Description

[0022] Figure 1 This is a perspective view of this embodiment, mainly showing its overall structure; Figure 2 This is a schematic diagram after the cabinet door has been removed, mainly showing the equipment room, cooling room, and freeze-drying room; Figure 3 This is a three-dimensional view of the freezer rack, mainly showing its specific structure; Figure 4 This is a view of the refrigeration unit with its outer casing hidden, mainly showing the silencer box, vacuum chamber, and filter box; Figure 5 This is a cross-sectional view of the silencer enclosure, mainly showing the silencer structure; Figure 6 This is a cross-sectional view of the filter box, mainly showing the filter plates.

[0023] Explanation of reference numerals in the attached drawings: 1. Body; 110. Cooling chamber; 11. Refrigeration unit; 12. First door; 120. Equipment room; 13. Exhaust fan; 14. Second door; 130. Freeze-drying chamber; 15. Freezing rack; 151. Support tray; 152. Placement slot; 153. Linear slide rail pair; 16. Third door; 100. Casters; 140. Outer shell; 21. Vacuum extraction chamber; 211. Dual-branch manifold; 212. Support Pipe; 213, Main pipe; 22, Three-way solenoid valve; 221, First interface; 222, Second interface; 223, Third interface; 23, Silencer box; 231, Silencer structure; 232, First on / off solenoid valve; 233, Silencer exhaust pipe; 24, Second on / off solenoid valve; 25, Filter box; 251, Filter plate; 26, Vacuum connection pipe; 261, Vacuum degree detection sensor; 31, Controller screen; 32, Instrument panel. Detailed Implementation

[0024] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this application, and not all embodiments. The components of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0025] Reference Figure 1 and Figure 2 A freeze dryer for preparing chemical reagents includes a main body 1, a vacuum device, a refrigeration device 11, and a control device. The bottom of the main body 1 is fixedly equipped with casters 100 with braking function, facilitating the movement and securing of the equipment and solving the problem of poor mobility in existing freeze dryers. A freeze-drying chamber 130 is provided inside the main body 1, and a detachable freezing rack 15 for layering reagent bottles is installed inside the freeze-drying chamber 130, improving the convenience of reagent loading through the layered design.

[0026] Reference Figure 1 and Figure 2The machine body 1 also includes independent cooling chambers 110 and equipment chambers 120. A refrigeration unit 11 is located within the cooling chamber 110, and a vacuum unit, including an exhaust fan 13, is fixedly installed within the equipment chamber 120. The cooling chamber 110 and equipment chamber 120 are located side-by-side at the lower part of the machine body 1, with their bottoms at the same height. A freeze-drying chamber 130 is located at the upper part of the machine body 1. The machine body 1 has an overall layered structure with a lower center of gravity. This layout effectively solves the problem of imbalance caused by unreasonable system layout in existing equipment, improves equipment stability, and reduces vibration transmission and noise during operation.

[0027] Reference Figure 1 and Figure 2 The machine body 1 is provided with doors for sealing the cooling chamber 110, the equipment chamber 120 and the freeze-drying chamber 130, and forms a first door 12, a second door 14 and a third door 16. Each door is provided with a sealing ring between itself and the machine body 1 to ensure the airtightness of each chamber.

[0028] Reference Figure 3 The freezer rack 15 has several vertically spaced support trays 151. The support trays 151 are slidably connected to the freezer rack 15 via linear slide rails 153, facilitating the removal and insertion of the support trays 151 and improving the convenience of reagent filling and removal. The support trays 151 have multiple placement slots 152 for positioning and mounting reagent bottles, ensuring the stability of the reagent bottles during the freeze-drying process.

[0029] Reference Figure 1 and Figure 4 The vacuum device also includes a housing 140, which is fixedly installed on the top of the body 1. A vacuum chamber 21 is sealed inside the housing 140 and connected to the suction end of the exhaust fan 13 via a sealed pipe. The vacuum device also includes a three-way solenoid valve 22, which has three ports: a first port 221, a second port 222, and a third port 223. The first port 221 is connected to the vacuum chamber 21 via a dual-branch manifold 211, which consists of two branch pipes 212 and a main pipe 213. One end of each branch pipe 212 is connected to the vacuum chamber 21, and the other end is connected to the main pipe 213. The vacuum device also includes a silencer box 23 and a filter box 25. The silencer box 23 is connected to the second port 222 via a pipe; the filter box 25 is connected to the third port 223 via a pipe.

[0030] Reference Figure 4 and Figure 5The muffler box 23 is equipped with a muffler structure 231, which is made of sponge and has a corrugated cross-section. The muffler box 23 is also connected to a muffler exhaust pipe 233, one end of which extends to the outside of the outer casing 140. A first solenoid valve 232 is installed on the muffler exhaust pipe 233.

[0031] Reference Figure 4 and Figure 6 The filter box 25 has several layers of filter plates 251 arranged sequentially along the airflow direction. A second solenoid valve 24 is installed on the pipe between the filter box 25 and the three-way solenoid valve 22. The filter box 25 is sealed and connected to the freeze-drying chamber 130 through a vacuum connecting pipe 26. A vacuum degree detection sensor 261 is installed on the vacuum connecting pipe 26.

[0032] The control device includes an integrated controller, a controller screen 31, and an instrument panel 32. The integrated controller is electrically connected to the controller screen 31, the instrument panel 32, the vacuum device, and the refrigeration device 11, respectively, to achieve centralized control and monitoring of the various systems of the equipment. The control method of the control device is conventional and will not be described further.

[0033] The implementation principle of this embodiment is as follows: When it is necessary to evacuate the freeze-drying chamber 130, the exhaust fan 13 is started, the three-way solenoid valve 22 adjusts the connection between the first port 221 and the third port 223, and the second port 222 is closed. At the same time, the second opening and closing solenoid valve 24 is opened, and the first opening and closing solenoid valve 232 is closed. At this time, the airflow path during vacuuming is as follows: exhaust fan 13, vacuum chamber 21, dual-branch manifold 211, three-way solenoid valve 22, filter box 25, freeze-drying chamber 130. The airflow is filtered by the filter plate 251 in the filter box 25 to ensure that the gas entering the vacuum system is clean and to protect the components of the vacuum system.

[0034] When it is necessary to lower the vacuum level in the freeze-drying chamber 130, the three-way solenoid valve 22 connects the second port 222 and the third port 223, while the first port 221 closes. Simultaneously, the second on / off solenoid valve 24 opens, and the first on / off solenoid valve 232 closes. At this time, air from the silencer box 23 flows into the freeze-drying chamber 130 through the filter box 25, causing the air pressure in the freeze-drying chamber 130 to rise and the air pressure in the silencer box 23 to fall. Since the air pressure in the silencer box 23 is constant, the closer the air pressure in the silencer box 23 is to the air pressure in the freeze-drying chamber 130, the slower the air flows from the silencer box 23 into the freeze-drying chamber 130. This allows the vacuum level sensor 261 to detect the vacuum level data and then control the three-way solenoid valve 22 to adjust its opening and closing, allowing more time for sensor feedback and adjustment.

[0035] After the vacuum reduction process is completed, the three-way solenoid valve 22 is adjusted to close the second port 222 and the third port 223, and at the same time the first opening and closing solenoid valve 232 is opened. Since the silencer box 23 is under negative pressure at this time, a large amount of air will quickly enter the silencer box 23, and the silencer structure 231 will play a role in silencing and reducing noise.

[0036] This invention, through a rational structural layout design, effectively solves the problems of inconvenient reagent loading, poor mobility, unbalanced center of gravity, and high noise in existing freeze dryers, thus improving the ease of use, stability, and reliability of the equipment. Simultaneously, through the optimized design of the vacuum device, precise control of the vacuum level within the freeze-drying chamber 130°C is achieved, improving the efficiency and quality of freeze-drying.

[0037] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A freeze dryer for preparing chemical reagents, characterized in that, The device includes a body (1), a vacuum device, a refrigeration device (11), and a control device. The bottom of the body (1) is fixedly equipped with casters (100) with braking function. The body (1) has a freeze-drying chamber (130) and a freezer rack (15) for layering reagent bottles. The body (1) also has an independent cooling chamber (110) and an equipment chamber (120). The refrigeration device (11) is located in the cooling chamber (110). The vacuum device includes a blower (13) and the blower (13) is fixedly located in the equipment chamber (120). The cooling chamber (110) and the equipment chamber (120) are located side by side at the lower part of the body (1) and their bottoms are at the same height. The freeze-drying chamber (130) is located at the upper part of the body (1). The body (1) has a layered structure design with the center of gravity shifted downward.

2. The freeze dryer for preparing chemical reagents according to claim 1, characterized in that, The body (1) is provided with a door for sealing the cooling chamber (110), equipment chamber (120) and freeze-drying chamber (130), and has a first door (12), a second door (14) and a third door (16).

3. The freeze dryer for preparing chemical reagents according to claim 1, characterized in that, The freezer rack (15) has several support trays (151) spaced vertically inside. The support trays (151) are slidably connected to the freezer rack (15) via linear slide rail pairs (153). The support trays (151) have multiple placement slots (152) for positioning and installing reagent bottles.

4. The freeze dryer for preparing chemical reagents according to claim 1, characterized in that, The vacuum device also includes a housing (140), which is fixedly installed on the top of the body (1). A vacuum chamber (21) is sealed inside the housing (140), and the vacuum chamber (21) is connected to the suction end of the blower (13) through a sealed pipe.

5. The freeze dryer for preparing chemical reagents according to claim 4, characterized in that, The vacuum device also includes a three-way solenoid valve (22), which has three ports: a first port (221), a second port (222), and a third port (223). The first port (221) is connected to the vacuum chamber (21) via a dual-branch manifold (211), which consists of two branch pipes (212) and a main pipe (213). One end of each branch pipe (212) is connected to the vacuum chamber (21), and the other end of each branch pipe (212) is connected to the main pipe (213). The vacuum device also includes a silencer box (23) and a filter box (25). The silencer box (23) is connected to the second port (222) via a pipe, and the filter box (25) is connected to the third port (223) via a pipe.

6. The freeze dryer for preparing chemical reagents according to claim 5, characterized in that, The silencer box (23) is provided with a silencer structure (231), and the silencer box (23) is also connected to a silencer exhaust pipe (233). One end of the silencer exhaust pipe (233) extends to the outside of the outer shell (140), and a first opening and closing solenoid valve (232) is provided on the silencer exhaust pipe (233).

7. The freeze dryer for preparing chemical reagents according to claim 5, characterized in that, The filter box (25) has several layers of filter plates (251) arranged sequentially along the airflow direction. A second solenoid valve (24) is installed on the pipe between the filter box (25) and the three-way solenoid valve (22). The filter box (25) is sealed and connected to the freeze-drying chamber (130) through a vacuum connecting pipe (26). A vacuum degree detection sensor (261) is installed on the vacuum connecting pipe (26).

8. The freeze dryer for preparing chemical reagents according to claim 1, characterized in that, The control device includes an integrated controller, a controller screen (31) and an instrument panel (32), and the integrated controller is electrically connected to the controller screen (31), the instrument panel (32), the vacuum device and the refrigeration device (11) respectively.

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