Freeze dryer water catching system with shutter flow guide structure

Abstract

The utility model discloses a freeze dryer water catching system with a shutter flow guide structure, which belongs to the technical field of freeze dryers and comprises a drying bin, an inner cavity of the drying bin is divided into a drying chamber and a cold trap chamber by a partition plate, and the drying chamber and the cold trap chamber are communicated through an airflow channel positioned on the partition plate. A flow guide plate, a closing plate, a water catching area and an exhaust pipe are sequentially arranged in the cold trap chamber from the end close to the drying chamber to the end away from the drying chamber, the edges of the flow guide plate and the closing plate are both in sealed connection with the inner wall of the drying bin, a shutter is arranged in the middle of the flow guide plate, and a through hole is formed in the middle of the closing plate. The edge of the vertical projection from the water catching area to the sealing plate is overlapped with the edge of the through hole, a water catching coil pipe is laid in the water catching area, and the exhaust pipe penetrates out of the drying bin to be connected with a vacuum unit. According to the freeze dryer water catching system with the shutter flow guide structure, airflow is guided, the utilization rate of the water catching coil pipe is improved, and then the water catching efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of freeze dryer technology, and in particular relates to a freeze dryer water capture system with a louvered flow guiding structure. Background Technology

[0002] When the freeze dryer is working, the vacuum inside the drying chamber is maintained by both the vacuum unit and the cold trap chamber. The vacuum unit is only used to extract non-condensable gases. During the drying process, a large amount of water vapor is generated, which cannot be completely discharged from the chamber by the vacuum unit alone. The water trap coils in the cold trap chamber must be used to condense the water vapor into frost in order to maintain the corresponding vacuum level.

[0003] In the existing technology, because only a partition plate with an airflow channel at the top is set between the drying chamber and the cold trap chamber, the airflow is unevenly contacted with the water trap coil in the cold trap chamber when it passes through the water trap coil under the suction of the vacuum unit. In some cases, the water trap coil cannot even come into contact with the air drawn out from the drying chamber. As a result, the utilization rate of the water trap coil is not high, which leads to the problem of low water trapping efficiency.

[0004] To solve the above problems, a new type of freeze dryer water capture system is needed. Utility Model Content

[0005] The purpose of this invention is to provide a freeze dryer water-catching system with a louvered flow guiding structure, thereby improving the utilization rate of the water-catching coil and thus improving the water-catching efficiency.

[0006] To achieve the above objectives, this utility model provides a freeze dryer water trapping system with a louvered airflow guiding structure, including a drying chamber. The inner cavity of the drying chamber is divided into a drying room and a cold trap chamber by a partition plate. The drying room and the cold trap chamber are connected by an airflow channel located on the partition plate. In the cold trap chamber, a guide plate, a sealing plate, a water trapping area, and an exhaust pipe are sequentially arranged from one end near the drying room to the other end away from the drying room. The edges of the guide plate and the sealing plate are sealed to the inner wall of the drying chamber. A louver is provided in the middle of the guide plate, and a through hole is provided in the middle of the sealing plate. The edge of the vertical projection of the water trapping area onto the sealing plate overlaps with the edge of the through hole. The water trapping area is filled with water trapping coils, and the exhaust pipe extends out of the drying chamber and connects to a vacuum unit.

[0007] Preferably, the central axis of the through hole coincides with the central axis of the louver, the size of the through hole is larger than the size of the louver, and the louvers inside the louver are inclined downwards.

[0008] Preferably, the bottom opening of the air extraction pipe is located on the central axis of the water-catching coil.

[0009] Preferably, a plurality of material support plates are fixedly connected inside the drying chamber, and the drying chamber is provided with a sealing door corresponding to the drying chamber.

[0010] Preferably, the water-catching coil is filled with refrigerant, and one or more water-catching coils can be provided. Each water-catching coil has a refrigerant inlet and a refrigerant outlet at both ends.

[0011] Therefore, the freeze dryer water-catching system with a louvered airflow guiding structure of the present invention has the following beneficial effects: the louvers on the airflow guiding plate and the through holes on the sealing plate are used to guide and constrain the airflow, so that the airflow passes evenly through the water-catching coil, thereby increasing the contact area between the airflow and the water-catching coil and thus improving the water-catching efficiency.

[0012] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0013] Figure 1 This is a cross-sectional view of an embodiment of a freeze dryer water capture system with a louvered airflow guiding structure according to this utility model;

[0014] Figure 2 This is another cross-sectional view of an embodiment of a freeze dryer water capture system with a louvered airflow guiding structure according to this utility model;

[0015] Figure 3 This is a schematic diagram of the external structure of a freeze dryer water capture system with a louvered flow guiding structure according to this utility model.

[0016] In the diagram: 1. Drying chamber; 2. Partition plate; 3. Drying room; 4. Cold trap chamber; 5. Baffle plate; 6. Sealing plate; 7. Water trapping coil; 8. Exhaust pipe; 9. Louver; 10. Through hole; 11. Material support plate; 12. Sealing door. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] Example

[0020] Reference Figure 1-3 As shown, this embodiment provides a freeze dryer water-catching system with a louvered airflow guiding structure, including a drying chamber 1. The inner cavity of the drying chamber 1 is divided into a drying chamber 3 and a cold trap chamber 4 by a partition plate 2. The drying chamber 3 and the cold trap chamber 4 are connected by an airflow channel located on the partition plate 2. In this embodiment, the airflow channel is located at the top of the partition plate 2. Inside the cold trap chamber 4, from the end closest to the drying chamber 3 to the end furthest from the drying chamber 3, a guide plate 5, a sealing plate 6, a water-catching zone, and an exhaust pipe 8 are arranged sequentially. The edges of the guide plate 5 and the sealing plate 6 are sealed to the inner wall of the drying chamber 1. A louver 9 is provided in the middle of the guide plate 5, and a through hole 10 is provided in the middle of the sealing plate 6. The edge of the water-catching zone's vertical projection onto the sealing plate 6 overlaps with the edge of the through hole 10. The water-catching zone is filled with a water-catching coil 7, and the exhaust pipe 8 extends out of the drying chamber 1 and connects to a vacuum unit.

[0021] During operation, the vacuum unit provides suction power to the extraction pipe 8, causing the gas in the drying chamber 3 to flow sequentially through the airflow channel, louvers 9, and through-holes 10 to the water-catching coil 7. Part of the water vapor in the airflow pre-cools and sublimates into frost at the water-catching coil 7, while the remaining water vapor is discharged from the drying chamber 1 through the extraction pipe 8. During the gas flow, the louvers 9 and through-holes 10 guide and constrain the airflow; that is, the louvers 9 allow the gas to concentrate and move through the through-holes 10 to the water-catching coil 7, increasing the contact area between the airflow and the water-catching coil 7, thereby improving the water-catching efficiency.

[0022] In a further optimized design, the central axis of the through hole 10 coincides with the central axis of the louver 9, the size of the through hole 10 is larger than the size of the louver 9, and the louvers inside the louver 9 are set tilted downwards.

[0023] In use, the louvers inside the louver 9 are tilted downwards, which makes the airflow more concentrated when it flows between the guide plate 5 and the sealing plate 6, and prevents it from spreading out over a large area. Then, because the size of the through hole 10 is larger than the size of the louver 9, the airflow surface can be expanded to the size of the through hole 10 when it passes through the through hole 10, that is, directly facing the water-catching coil 7. This ensures that the contact between the water-catching coil 7 and the water flow is more uniform and comprehensive, thus improving the water-catching efficiency.

[0024] In a further optimized design, the bottom opening of the air extraction pipe 8 is located on the central axis of the water-catching coil 7. This avoids the bottom opening of the air extraction pipe 8 being too low, which would prevent the upper part of the water-catching coil 7 from contacting the airflow and thus failing to perform its water-catching function. At the same time, it avoids the bottom opening of the air extraction pipe 8 being too high, which would prevent the lower part of the water-catching coil 7 from contacting the airflow and thus failing to perform its water-catching function.

[0025] In a further optimized design, several material support plates 11 are fixedly connected inside the drying chamber 3, and a sealing door 12 corresponding to the drying chamber 3 is provided on the drying hopper 1. The material support plates 11 are used to place materials, and the sealing door 12 facilitates the placement of materials onto the material support plates 11.

[0026] In a further preferred embodiment, the water-catching coil 7 is filled with refrigerant. The refrigerant is used to generate a low temperature on the surface of the water-catching coil 7, thereby causing water vapor in the airflow to condense into frost on the surface of the water-catching coil 7. One or more water-catching coils 7 can be provided, each with a refrigerant inlet and a refrigerant outlet at both ends. The refrigerant inlet and outlet facilitate the replacement and refilling of the refrigerant.

[0027] Therefore, the freeze dryer water-catching system with a louvered flow guiding structure of the present invention improves the utilization rate of the water-catching coil 7 and thus improves the water-catching efficiency.

[0028] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A freeze-dryer water trap system having a louvered flow guide structure, characterized by: The equipment includes a drying chamber (1), the inner cavity of which is divided into a drying chamber (3) and a cold trap chamber (4) by a partition plate (2). The drying chamber (3) and the cold trap chamber (4) are connected by an airflow channel located on the partition plate (2). The cold trap chamber (4) is provided with a guide plate (5), a sealing plate (6), a water trapping area and an exhaust pipe (8) in sequence from the end near the drying chamber (3) to the end away from the drying chamber (3). The edges of the guide plate (5) and the sealing plate (6) are sealed to the inner wall of the drying chamber (1). The guide plate (5) is provided with a louver (9) in the middle. The sealing plate (6) is provided with a through hole (10) in the middle. The edge of the vertical projection of the water trapping area onto the sealing plate (6) overlaps with the edge of the through hole (10). The water trapping area is filled with a water trapping coil (7). The exhaust pipe (8) extends out of the drying chamber (1) and connects to the vacuum unit.

2. The freeze-dryer water trap system with louvered flow guide structure of claim 1, wherein: The central axis of the through hole (10) coincides with the central axis of the louver (9). The size of the through hole (10) is larger than the size of the louver (9). The louvers inside the louver (9) are set tilted downwards.

3. The louvered condensation management system of claim 1, wherein: The bottom opening of the air extraction pipe (8) is located on the central axis of the water trapping coil (7).

4. The louvered condensation management system of claim 1, wherein: The drying chamber (3) is fixedly connected with several material support plates (11), and the drying silo (1) is provided with a sealing door (12) corresponding to the drying chamber (3).

5. The louvered condensation guide system of claim 1, wherein: The water-catching coil (7) is filled with refrigerant. The number of water-catching coils (7) is set to one or more, and each water-catching coil (7) has a refrigerant inlet and a refrigerant outlet at both ends.

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