Freeze-dryer cold trap flow guide anti-blocking structure

Abstract

The utility model discloses a freeze drier cold trap flow guide anti -blocking structure, include: the cold trap and freeze -drying cavity, the one end of cold trap is open end, and the other end of cold trap is sealed end, the sealed end is provided with the air inlet pipe, and one end of air inlet pipe extends to the cold trap, and the other end of air inlet pipe is connected with freeze -drying cavity, be provided with the coil pipe in the cold trap, and the coil pipe is connected with refrigerating apparatus, and the one side of coil pipe near sealed end is provided with the baffle, the sealed end still is provided with the air -exhaust pipe of communication with vacuum pump, and air -exhaust pipe is worn in baffle and extends to the other side of coil pipe. This structure prevents the blockage of air inlet pipe by frost on the coil pipe effectively, avoids the water vapor input during sublimation from entering the cold trap and causing the sample to be destroyed, ensures the continuous and stable flow of gas in the air inlet pipe and the air exhaust pipe, thereby ensuring the stability and reliability of the entire freeze drying process, improving the processing efficiency and quality of the sample.

Description

Technical Field

[0001] This utility model belongs to the field of freeze dryer technology, specifically a cold trap flow guiding and anti-clogging structure for a freeze dryer. Background Technology

[0002] A freeze dryer is a commonly used device that provides a low-temperature and vacuum environment for specific sublimation processes. It is generally divided into ordinary freeze dryers and in-situ freeze dryers. In an in-situ freeze dryer, the freeze-drying chamber and cold trap are separate, connected by pipes, with valves controlling the flow between them. When the frozen sample enters the drying chamber, the sublimated water vapor enters the cold trap and is captured by the coils inside, forming frost. To prevent the inlet and outlet from being blocked by frost, the frost needs to be removed to ensure the freeze-drying effect and avoid affecting the sample quality.

[0003] Chinese patent CN215270417U discloses a cold trap de-icing device. It introduces or cuts off hot water or steam supplied via a first external thread vacuum connector 15. A water / air inlet welding assembly 16 is installed to divert the hot water or steam into the spray pipe assembly, making de-icing more uniform and improving the de-icing effect. However, as drying progresses, the frost on the coils thickens, still making it impossible to ensure the unobstructed flow of the air inlet and outlet. The air inlet is connected to the freeze-drying chamber; if blocked, the sublimated water vapor cannot enter the cold trap and will be captured by the sample again, causing sample damage. Similarly, the outlet is connected to the vacuum pump; if blocked, the vacuum level in the freeze-drying chamber and cold trap gradually increases, preventing sublimation and causing the ice in the sample to liquefy directly, also leading to sample damage.

[0004] Therefore, there is an urgent need for a cold trap flow guiding and anti-clogging structure for freeze dryers, which isolates one end of the air inlet pipe from the coil area, effectively preventing the coil from frosting and clogging the air inlet pipe. By extending one end of the exhaust pipe to the other side of the coil, beyond the coil area, it effectively prevents the coil from frosting and clogging the exhaust pipe, thus ensuring the stability and reliability of the entire freeze-drying process. Utility Model Content

[0005] The purpose of this invention is to provide a cold trap flow guiding and anti-clogging structure for a freeze dryer, so as to solve at least one aspect of the problems and defects mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A cold trap flow guiding and anti-clogging structure for a freeze dryer includes: Cold trap and freeze-drying chamber; One end of the cold trap is an open end, and the other end of the cold trap is a sealed end; The sealed end is provided with an air inlet pipe, one end of which extends into the cold trap, and the other end of which is connected to the freeze-drying chamber. The cold trap is equipped with a coil, which is connected to the cooler, and a baffle is provided on the side of the coil near the sealed end. The sealing end is also provided with an air extraction pipe that is connected to the vacuum pump. The air extraction pipe passes through the baffle and extends to the other side of the coil.

[0007] The freeze dryer cold trap anti-clogging structure according to this utility model has at least the following technical effects: This freeze dryer's cold trap flow-guiding and anti-clogging structure isolates one end of the inlet pipe from the coil area by installing a baffle on one side of the coil. This effectively prevents frost buildup on the coil from clogging the inlet pipe, thus preventing water vapor from entering the cold trap during sublimation and damaging the sample. Furthermore, extending one end of the extraction pipe to the other side of the coil, beyond the coil area, effectively prevents frost buildup on the coil from clogging the extraction pipe. This avoids the vacuum level in the freeze-drying chamber and cold trap from slowly rising, preventing the conditions for sublimation from being met, and causing the ice in the sample to liquefy directly, thus damaging the sample. Simultaneously, it ensures that vapor can pass through the coil area more effectively, allowing the coil to capture vapor more uniformly. This structure guarantees a continuous and stable flow of gas in the inlet and extraction pipes, thereby ensuring the stability and reliability of the entire freeze-drying process and improving sample processing efficiency and quality.

[0008] As a further embodiment of this utility model: the coil has a sealed end and is provided with a refrigerant input end and a refrigerant output end on both sides of the air inlet pipe.

[0009] Because the coil has a sealed end and refrigerant input and output ends on both sides of the inlet pipe, the coil is connected to the refrigerator through the refrigerant input and output ends, allowing the refrigerant output from the refrigerator to circulate within the coil. This ensures that the water vapor drawn in through the extraction pipe can be quickly captured by the coil, achieving heat exchange. This rapid water vapor condensation process greatly shortens the freeze-drying time and improves the efficiency of the entire freeze-drying process.

[0010] As a further improvement of this utility model, the diameter of the baffle is adapted to the diameter of the coil.

[0011] Because the diameter of the baffle is matched with the diameter of the coil, the baffle can fully isolate the side of the coil near the sealing end, keeping one end of the air inlet pipe isolated from the coil. This prevents frost from forming on that side of the coil and blocking the air inlet pipe, ensuring that the air inlet pipe remains unobstructed. This also prevents water vapor drawn in during sublimation from failing to enter the cold trap and causing sample damage, thereby improving the stability and reliability of the entire freeze-drying process.

[0012] As a further improvement of this utility model, a drain outlet is provided at the bottom of the cold trap near the sealed end.

[0013] Because the cold trap has a drain outlet at the bottom near the sealed end, the drain outlet can drain the water accumulated in the cold trap in time, prevent the water from refreezing during the freezing process, help keep the inside of the cold trap dry, avoid excessive frost in the cold trap which may block the air vent, and ensure the normal operation of the freeze dryer and the quality of the freeze-dried sample.

[0014] As a further improvement of this utility model, a drain pipe is provided at the bottom of the drain outlet.

[0015] By installing a drain pipe at the bottom of the drain outlet, the discharged water can be guided to a designated location through the drain pipe, preventing the discharged water from flowing randomly, preventing water from splashing onto other parts of the equipment, avoiding damage to parts due to water corrosion, and ensuring the performance and lifespan of the freeze dryer.

[0016] As a further improvement of this utility model, connecting plates are respectively provided on both sides of the bottom of the cold trap.

[0017] By installing connecting plates on both sides of the bottom of the cold trap, the cold trap can be better fixed on the freeze dryer, preventing shaking or vibration during operation and maintaining the stability of the cold trap during the freeze drying process. It also makes it easier to remove the cold trap for individual maintenance or replacement.

[0018] As a further improvement of this invention, the outer surface of the coil is coated with a hydrophobic coating.

[0019] As a further improvement of this utility model, the hydrophobic coating is selected as a polytetrafluoroethylene coating.

[0020] During the operation of the cold trap, frost will continuously condense on the surface of the coil. However, because the outer surface of the coil is coated with a hydrophobic coating, which is made of polytetrafluoroethylene, the adhesion of the frost to the surface of the coil is greatly reduced, making it easier for the frost to fall off on its own or under slight external force. This avoids excessive accumulation of frost on the surface of the coil, ensures good heat exchange performance of the coil, thereby improving refrigeration efficiency, accelerating the condensation rate of water vapor during the freeze-drying process, and shortening the freeze-drying time.

[0021] As a further improvement of this utility model, an elastic buffer layer is provided on the side of the baffle near the coil.

[0022] As a further improvement of this utility model, the elastic buffer layer is made of rubber or sponge.

[0023] By setting an elastic buffer layer on the side of the baffle near the coil, the elastic buffer layer is made of rubber or sponge. The elastic buffer layer of rubber or sponge has good elasticity and flexibility, which can play a buffering role when the baffle comes into contact with the coil, disperse the impact force generated by the collision, effectively avoid damage to the coil, extend the service life of the coil, and thus ensure the performance and life of the entire freeze dryer. Attached Figure Description

[0024] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0025] Figure 1 A schematic diagram of the assembly of a cold trap anti-clogging structure for a freeze dryer; Figure 2 A three-dimensional schematic diagram of a cold trap anti-clogging structure for a freeze dryer; Figure 3 A second three-dimensional schematic diagram of a cold trap anti-clogging structure for a freeze dryer; Figure 4 for Figure 3 A cross-sectional structural diagram.

[0026] Figure label: 1. Cold trap; 101. Open end; 102. Sealed end; 103. Inlet pipe; 104. Coil; 105. Baffle; 106. Extraction pipe; 107. Refrigerant input end; 108. Refrigerant output end; 109. Drain outlet; 110. Drain pipe; 111. Connecting plate; 2. Freeze-drying chamber. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0028] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0030] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0033] like Figure 1-4 The present invention, as shown in this embodiment, provides a cold trap flow guiding and anti-clogging structure for a freeze dryer, comprising: a cold trap 1 and a freeze-drying chamber 2; one end of the cold trap 1 is an open end 101, and the other end of the cold trap 1 is a sealed end 102; the sealed end 102 is provided with an air inlet pipe 103, one end of which extends into the cold trap 1, and the other end of which communicates with the freeze-drying chamber 2; a coil 104 is provided inside the cold trap 1, which communicates with a cooler, and a baffle 105 is provided on the side of the coil 104 near the sealed end 102; the sealed end 102 is also provided with an exhaust pipe 106 communicating with a vacuum pump, which passes through the baffle 105 and extends to the other side of the coil 104.

[0034] Specifically, the cold trap flow-guiding and anti-clogging structure of this freeze dryer isolates one end of the inlet pipe 103 from the area of ​​the coil 104 by setting a baffle 105 on one side of the coil 104. This effectively prevents frost buildup on the coil 104 from clogging the inlet pipe 103, thus preventing water vapor from entering the cold trap 1 during sublimation and causing sample damage. Furthermore, by extending one end of the extraction pipe 106 to the other side of the coil 104, beyond the area of ​​the coil 104, it effectively prevents frost buildup on the coil 104 from clogging the extraction pipe 106. This prevents the vacuum level in the freeze-drying chamber 2 and the cold trap 1 from slowly increasing, which could prevent sublimation conditions from being met, causing the ice in the sample to liquefy directly and damage the sample. Simultaneously, it ensures that vapor can pass through the area of ​​the coil 104 more effectively, allowing the coil 104 to capture vapor more uniformly. This structure ensures a continuous and stable flow of gas within the inlet pipe 103 and the extraction pipe 106, thereby guaranteeing the stability and reliability of the entire freeze-drying process and improving sample processing efficiency and quality.

[0035] like Figure 2 As shown, the coil 104 has a sealing end 102 and is located on both sides of the inlet pipe 103, with a refrigerant input end 107 and a refrigerant output end 108 respectively.

[0036] Specifically, since the coil 104 has a sealed end and is provided with a refrigerant input end 107 and a refrigerant output end 108 on both sides of the inlet pipe 103, the coil 104 is connected to the refrigerator through the refrigerant input end 107 and the refrigerant output end 108, so that the refrigerant output by the refrigerator can form a circulation in the coil 104, ensuring that the water vapor drawn in through the suction pipe 106 can be quickly captured by the coil 104 to achieve heat exchange; this rapid water vapor condensation process greatly shortens the time required for freeze drying and improves the efficiency of the entire freeze drying process.

[0037] Furthermore, the diameter of the baffle 105 is adapted to the diameter of the coil 104.

[0038] Specifically, since the diameter of the baffle 105 is matched with the diameter of the coil 104, the baffle can fully isolate the side of the coil 104 near the sealing end 102, so that one end of the air inlet pipe 103 is isolated from the coil 104, preventing frost on that side of the coil 104 from blocking the air inlet pipe 103, ensuring that the air inlet pipe 103 is always unobstructed, and preventing the water vapor drawn in during sublimation from failing to enter the cold trap 1 and causing the sample to be damaged, thereby improving the stability and reliability of the entire freeze-drying process.

[0039] like Figure 2 and Figure 4 As shown, a drain outlet 109 is provided at the bottom of the cold trap 1 near the sealing end 102.

[0040] Specifically, since the bottom of the cold trap 1 near the sealing end 102 is provided with a drain outlet 109, the drain outlet 109 can drain the water accumulated in the cold trap 1 in time, prevent the water from refreezing during the freezing process, help keep the inside of the cold trap 1 dry, avoid excessive frost in the cold trap 1 which may block the air vent, and ensure the normal operation of the freeze dryer and the quality of the freeze-dried sample.

[0041] Furthermore, a drain pipe 110 is provided at the bottom of the drain outlet 109.

[0042] Specifically, by installing a drain pipe 110 at the bottom of the drain outlet 109, the drain outlet 109 can guide the discharged water to a designated location through the drain pipe 110, preventing the discharged water from flowing randomly, preventing water from splashing onto other parts of the equipment, avoiding damage to parts due to water corrosion, and ensuring the performance and lifespan of the freeze dryer.

[0043] like Figure 2 and Figure 3 As shown, connecting plates 111 are respectively provided on both sides of the bottom of the cold trap 1.

[0044] Specifically, by setting connecting plates 111 on both sides of the bottom of the cold trap 1, the cold trap 1 can be better fixed on the freeze dryer, preventing shaking or vibration during operation, maintaining the stability of the cold trap 1 during the freeze drying process, and also facilitating the removal of the cold trap 1 for individual maintenance or replacement.

[0045] According to an embodiment of the present invention, the outer surface of the coil 104 is coated with a hydrophobic coating, which is selected as a polytetrafluoroethylene coating.

[0046] Specifically, during the operation of the cold trap 1, frost will continuously condense on the surface of the coil 104. However, since the outer surface of the coil 104 is coated with a hydrophobic coating, which is made of polytetrafluoroethylene, the adhesion of the frost to the surface of the coil 104 is greatly reduced, making it easier for the frost to fall off on its own or fall off under slight external force. This avoids excessive accumulation of frost on the surface of the coil 104, ensures good heat exchange performance of the coil 104, thereby improving refrigeration efficiency, accelerating the condensation rate of water vapor during the freeze-drying process, and shortening the freeze-drying time.

[0047] It should also be noted that an elastic buffer layer is provided on the side of the baffle 105 near the coil 104. The elastic buffer layer is made of rubber or sponge.

[0048] Specifically, an elastic buffer layer is provided on the side of the baffle 105 near the coil 104. The elastic buffer layer is made of rubber or sponge. The elastic buffer layer of rubber or sponge has good elasticity and flexibility, which can play a buffering role when the baffle 105 comes into contact with the coil 104, disperse the impact force generated by the collision, effectively prevent the coil 104 from being damaged, extend the service life of the coil 104, and thus ensure the performance and life of the entire freeze dryer.

[0049] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. A cold trap flow guiding and anti-clogging structure for a freeze dryer, characterized in that, include: Cold trap and freeze-drying chamber; One end of the cold trap is an open end, and the other end of the cold trap is a sealed end; The sealed end is provided with an air inlet pipe, one end of which extends into the cold trap, and the other end of which is connected to the freeze-drying chamber. The cold trap is equipped with a coil, which is connected to the cooler, and a baffle is provided on the side of the coil near the sealed end. The sealing end is also provided with an air extraction pipe that is connected to the vacuum pump. The air extraction pipe passes through the baffle and extends to the other side of the coil.

2. The freeze dryer cold trap flow guiding and anti-clogging structure according to claim 1, characterized in that, The coil has a sealed end and is located on both sides of the inlet pipe, with a refrigerant input end and a refrigerant output end respectively.

3. The freeze dryer cold trap flow guiding and anti-clogging structure according to claim 1, characterized in that, The diameter of the baffle is adapted to the diameter of the coil.

4. The freeze dryer cold trap flow guiding and anti-clogging structure according to claim 1, characterized in that, A drain outlet is provided at the bottom of the cold trap near the sealed end.

5. The freeze dryer cold trap flow guiding and anti-clogging structure according to claim 4, characterized in that, A drain pipe is installed at the bottom of the drain outlet.

6. The freeze dryer cold trap flow guiding and anti-clogging structure according to claim 1, characterized in that, Connecting plates are provided on both sides of the bottom of the cold trap.

7. The freeze dryer cold trap flow guiding and anti-clogging structure according to claim 1, characterized in that, The outer surface of the coil is coated with a hydrophobic coating.

8. The freeze dryer cold trap flow guiding and anti-clogging structure according to claim 7, characterized in that, The hydrophobic coating is selected as a polytetrafluoroethylene coating.

9. The freeze dryer cold trap flow guiding and anti-clogging structure according to any one of claims 1 to 8, characterized in that, An elastic buffer layer is provided on the side of the baffle closest to the coil.

10. The freeze dryer cold trap flow guiding and anti-clogging structure according to claim 9, characterized in that, The elastic buffer layer is made of rubber or sponge.

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