Freeze-drying box

Abstract

The utility model discloses a freeze-drying box. The freeze-drying box comprises a cylinder body, a plate layer goods shelf, a refrigeration pipeline, a heating belt and a vacuum assembly, the plate layer goods shelf is arranged in the cylinder body; the refrigeration pipeline is wound on the outer wall of the cylinder, and a gap is formed between adjacent pipe sections; the heating belt is arranged in the gap; the vacuum assembly is arranged on the barrel and used for providing a vacuum environment for the interior of the barrel. The ice supplementing efficiency can be improved, and the defrosting speed can be increased.

Description

Technical Field

[0001] This utility model relates to the field of vacuum freeze-drying equipment, and in particular to a freeze-drying box. Background Technology

[0002] Currently, the basic mechanical components of a freeze dryer consist of a drying chamber and a cold trap. In large freeze dryers, the drying chamber and cold trap are usually connected by pipes. Moisture in the product is released under specific temperature and vacuum conditions and condenses on the cold trap pipes, thus achieving product drying.

[0003] Some existing freeze dryers integrate the drying chamber and cold trap, which simplifies the equipment structure, but this design presents several technical problems: First, because the cold trap piping is located inside the chamber, water molecules travel a longer distance, reducing ice replenishment efficiency; second, the traditional built-in cold trap design results in a larger equipment size, increasing the cooling capacity required; third, existing freeze dryers generally use internal plate heating for defrosting, which leads to slow ice melting and a lengthy defrosting process, affecting the equipment's operating efficiency. These technical problems are particularly prominent in applications with high efficiency requirements, such as experimental freeze dryers.

[0004] When water molecules precipitate from the product during freeze-drying, they need to be quickly captured on the condensation surface. In existing technologies, water molecules need to travel a considerable distance to reach the condensation surface, which not only reduces freeze-drying efficiency but also increases energy consumption. Furthermore, during defrosting, traditional internal heating methods struggle to achieve rapid ice removal, resulting in a lengthy defrosting process and reduced equipment utilization.

[0005] Therefore, there is an urgent need to develop a freeze-drying chamber to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a freeze-drying box that can improve ice replenishment efficiency and accelerate defrosting.

[0007] To solve the above-mentioned technical problems, this utility model provides a freeze-drying box, including a cylindrical body, a shelf, refrigeration pipes, a heating belt, and a vacuum assembly; the shelf is disposed inside the cylindrical body; the refrigeration pipes are wound around the outer wall of the cylindrical body, and gaps are formed between adjacent pipe sections; the heating belt is disposed within the gaps; the vacuum assembly is disposed on the cylindrical body to provide a vacuum environment inside the cylindrical body.

[0008] Furthermore, the refrigeration pipe is spirally wound around the outer wall of the cylinder.

[0009] Furthermore, the refrigeration pipe is provided with an inlet and an outlet at both ends, and the inlet and the outlet are located on the side of the cylinder.

[0010] Furthermore, the refrigeration pipe is tightly attached to the outer wall of the cylinder.

[0011] Furthermore, the heating belt is arranged along the winding direction of the refrigeration pipe.

[0012] Furthermore, it also includes a liquid collection pipe; the liquid collection pipe is connected to the pallet rack; the liquid collection pipe is filled with liquid for temperature control of the pallet rack.

[0013] Furthermore, it also includes a pallet; the pallet is detachably mounted on the shelf.

[0014] Furthermore, the vacuum assembly includes a vacuum port and a vacuum detection port; the vacuum port is used to connect to a vacuum pump; and the vacuum detection port is used to connect to a vacuum gauge tube.

[0015] Furthermore, it also includes an electrical port; the electrical port is disposed on the cylinder and is used to connect a sensor.

[0016] Furthermore, it also includes a drain outlet; the drain outlet is located at the bottom of the cylinder.

[0017] Through the above technical solution, this utility model has the following beneficial effects:

[0018] By placing the refrigeration pipes on the outer wall of the cylinder and installing heating bands in the gaps between adjacent pipe sections, water molecules can quickly reach the condensation surface, significantly shortening the movement distance of water molecules and improving the ice replenishment efficiency. At the same time, the external refrigeration pipe design reduces the size of the equipment and lowers the cooling capacity requirement.

[0019] In addition, by installing heating belts in the gaps of the refrigeration pipes and arranging them in a spiral winding manner, heat can be quickly transferred to the inner wall of the cylinder during defrosting, allowing the ice layer to separate quickly from the cylinder wall and significantly improving defrosting efficiency. Furthermore, by controlling the temperature of the shelf racks through the liquid collection pipe, the product temperature can be precisely adjusted, improving the controllability of the freeze-drying process. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the freeze-drying box in one embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the overall structure of the vacuum component in the freeze-drying chamber in one embodiment of the present invention.

[0022] In the diagram, 1 is the pallet rack; 2 is the pallet; 3 is the heating element; 4 is the refrigeration pipe; 5 is the cylinder; 6 is the liquid collection pipe; 7 is the vacuum detection port; 8 is the vacuum port; 9 is the inlet; 10 is the outlet; 11 is the electrical port; and 12 is the drain outlet. Detailed Implementation

[0023] The following is a more detailed description of a freeze-drying box according to the present invention, with reference to the accompanying drawings, which illustrate preferred embodiments of the present invention. It should be understood that those skilled in the art can modify the present invention described herein while still achieving its advantageous effects. Therefore, the following description should be understood as being of general knowledge to those skilled in the art and is not intended to limit the present invention.

[0024] The present invention will be described in more detail below by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0025] like Figures 1-2 As shown, this utility model embodiment proposes a simple and practical freeze-drying chamber, including a cylindrical body 5, a shelf 1, refrigeration pipes 4, a heating belt 3, and a vacuum assembly. Specifically, the shelf 1 is disposed inside the cylindrical body 5; the refrigeration pipes 4 are wound around the outer wall of the cylindrical body 5, with gaps formed between adjacent pipe sections; the heating belt 3 is disposed within the gaps; and the vacuum assembly is disposed on the cylindrical body 5 to provide a vacuum environment inside the cylindrical body 5. In this embodiment, the external design of the refrigeration pipes 4 reduces the distance water molecules travel, improving the ice replenishment efficiency. For example, it can shorten the original defrosting time by more than 60%, and the freeze-drying chamber is small in size, making it widely applicable to small experimental freeze dryers and cryogenic freeze dryers.

[0026] Preferably, the refrigeration pipe 4 is spirally wound around the outer wall of the cylinder 5. The spiral winding increases the contact area between the refrigeration pipe 4 and the cylinder 5, improving heat exchange efficiency. In a specific example, the refrigeration pipe 4 can be made of copper or stainless steel; the choice of material depends on the specific application environment and cost requirements.

[0027] In one embodiment, the refrigeration pipe 4 is provided with an inlet 9 and an outlet 10 at both ends, and the inlet 9 and the outlet 10 are located on the side of the cylinder 5. This arrangement facilitates the entry and exit of refrigerant and improves the stability of system operation.

[0028] Preferably, the refrigeration pipe 4 is tightly attached to the outer wall of the cylinder 5. In a specific example, the refrigeration pipe 4 may be made of aluminum and fixedly connected to the cylinder 5 by welding. This design increases heat transfer efficiency and improves the refrigeration effect.

[0029] Preferably, the refrigeration pipe 4 is a refrigeration evaporator pipe.

[0030] In this embodiment, the heating belt 3 is arranged along the winding direction of the refrigeration pipe 4. This arrangement ensures uniform heat distribution and improves defrosting efficiency. In a specific example, the heating belt 3 can be a silicone rubber heating belt 3 or a far-infrared heating belt 3; the choice of different types of heating belt 3 can be determined according to the actual application scenario. The heating belt 3 can be fixed by adhesive or by clips within the gap.

[0031] Preferably, this embodiment also includes a liquid collection pipe 6; the liquid collection pipe 6 is connected to the shelf 1; the liquid collection pipe 6 is filled with liquid for temperature control of the shelf 1. In a specific example, the liquid collection pipe 6 may be made of stainless steel and filled with silicone oil. The silicone oil flows inside the liquid collection pipe 6, and the temperature of the shelf 1 is controlled by the temperature rise and fall of the silicone oil, thereby controlling the product temperature inside the tray 2 for pre-freezing and sublimation.

[0032] In a specific example, the liquid collecting pipe 6 can be arranged in a serpentine pattern or in parallel straight pipes. The arrangement of the liquid collecting pipe 6 can be selected according to the actual heat load requirements. In addition to silicone oil, the liquid collecting pipe 6 can also be filled with other heat-conducting media such as heat-conducting oil.

[0033] In one embodiment, the embodiment further includes a tray 2; the tray 2 is detachably mounted on the shelving unit 1. In a specific example, the tray 2 may be made of aluminum alloy with a specially treated surface. The detachable design improves the ease of cleaning and maintenance of the equipment.

[0034] In one specific example, the tray 2 can be designed as a grid structure or a flat structure. Anti-slip protrusions can be provided on the edges of the tray 2 to facilitate placement and removal. The surface of the tray 2 can be anodized to improve durability.

[0035] In this embodiment, the vacuum assembly includes a vacuum port 8 and a vacuum detection port 7; the vacuum port 8 is used to connect to a vacuum pump; and the vacuum detection port 7 is used to connect to a vacuum gauge tube. This design enhances the control accuracy of the vacuum level.

[0036] In a specific example, the vacuum port 8 can be located at any suitable position on the cylinder 5, and can be flexibly arranged according to the actual installation space requirements. The vacuum detection port 7 can be connected by a flange or by a quick coupling.

[0037] Preferably, this embodiment also includes an electrical port 11; the electrical port 11 is disposed on the cylinder 5 and is used to connect sensors. In a specific example, the electrical port 11 can connect to various sensors such as temperature sensors and pressure sensors. This design can improve the monitoring accuracy of operating parameters.

[0038] In one specific example, the electrical port 11 may be equipped with a waterproof sealing ring to improve sealing performance. The electrical interface can adopt a standard interface, facilitating the quick replacement and maintenance of various sensors.

[0039] In one embodiment, the embodiment further includes a drain outlet 12; the drain outlet 12 is located at the bottom of the cylinder 5. This design improves the efficiency of defrosting water drainage.

[0040] In one specific example, the drain outlet 12 may be equipped with a filter screen to prevent impurities from clogging it. The drain outlet 12 may also be equipped with a ball valve or a shut-off valve to facilitate pipeline disconnection during maintenance.

[0041] In a specific example, the cylinder 5 can be made of stainless steel, and an insulation layer can be provided on the outer wall of the cylinder 5. The insulation layer can be made of polyurethane foam or a vacuum insulation layer. Different insulation methods can be selected according to actual needs.

[0042] Preferably, the cylindrical body 5 is a circular drying oven.

[0043] In one specific example, the shelving unit 1 can be designed with multiple layers, and the spacing between each layer is adjustable. The shelving unit 1 can be made of stainless steel or aluminum alloy. The surface of the shelving unit can be sandblasted to improve its corrosion resistance.

[0044] In this embodiment, when the equipment is running, the vacuum pump evacuates the inside of the cylinder 5 through the vacuum port 8, and the vacuum gauge monitors the vacuum level through the vacuum detection port 7. The refrigerant enters the refrigeration pipe 4 through the inlet 9, circulating and cooling within the pipe, creating a low-temperature zone on the outer wall of the cylinder 5. Water molecules precipitate from the product and quickly reach the inner wall of the cylinder 5, condensing into ice. During the sublimation stage of the freeze-drying process, the refrigerant evaporates and absorbs heat in the refrigeration pipe 4, thus removing heat from the cylinder 5. Under vacuum conditions, moisture in the product inside the tray 2 is trapped on the inner wall of the cylinder 5, forming an ice layer, thereby completing the dehydration process. In the de-icing stage after freeze-drying, the shelf 1 is controlled to reach a high temperature, and the electric heating belt 3 reaches above zero degrees Celsius. The ice layer slowly detaches from the inner wall of the cylinder 5, at which point the ice can be directly removed from the cylinder 5, achieving rapid de-icing. During defrosting, the heating belt 3 is activated, causing the ice layer to quickly detach from the inner wall of the cylinder 5, and defrosting water is discharged through the drain port 12. Throughout the process, the heat-conducting medium in the liquid collection pipe 6 controls the temperature of the shelf 1 to ensure that the product temperature meets the process requirements.

[0045] Furthermore, traditional de-icing methods typically involve heating the internal plates of the drying chamber, using thermal radiation for de-icing. In this embodiment, however, an electric heating belt 3 (i.e., heating belt 3) is filled into the gaps of the refrigeration pipes 4 on the outer wall of the drying chamber. When de-icing is needed, the electric heating is activated, and heat is transferred to the inner wall of the cylinder 5 to melt the ice. This method can shorten the original de-icing time by more than 60%.

[0046] In summary, the freeze-drying box proposed in this utility model has the following advantages:

[0047] By placing the refrigeration pipes on the outer wall of the cylinder and installing heating bands in the gaps between adjacent pipe sections, water molecules can quickly reach the condensation surface, significantly shortening the movement distance of water molecules and improving the ice replenishment efficiency. At the same time, the external refrigeration pipe design reduces the size of the equipment and lowers the cooling capacity requirement.

[0048] In addition, by installing heating belts in the gaps of the refrigeration pipes and arranging them in a spiral winding manner, heat can be quickly transferred to the inner wall of the cylinder during defrosting, allowing the ice layer to separate quickly from the cylinder wall and significantly improving defrosting efficiency. Furthermore, by controlling the temperature of the shelf racks through the liquid collection pipe, the product temperature can be precisely adjusted, improving the controllability of the freeze-drying process.

[0049] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A freeze-drying box, characterized in that, This includes the cylinder, pallet racks, refrigeration pipes, heating belts, and vacuum components; The shelving unit is located inside the cylinder; the refrigeration pipes are wound around the outer wall of the cylinder, with gaps formed between adjacent pipe sections; the heating belt is located within the gaps; and the vacuum assembly is located on the cylinder to provide a vacuum environment inside the cylinder.

2. The freeze-drying box as described in claim 1, characterized in that, The refrigeration pipe is spirally wound around the outer wall of the cylinder.

3. The freeze-drying box as described in claim 1, characterized in that, The refrigeration pipe has an inlet and an outlet at both ends, and the inlet and the outlet are located on the side of the cylinder.

4. The freeze-drying box as described in claim 1, characterized in that, The refrigeration pipe is attached tightly to the outer wall of the cylinder.

5. The freeze-drying box as described in claim 1, characterized in that, The heating band is arranged along the winding direction of the refrigeration pipe.

6. The freeze-drying box as described in claim 1, characterized in that, It also includes a liquid collection pipe; the liquid collection pipe is connected to the pallet rack; the liquid collection pipe is filled with liquid for temperature control of the pallet rack.

7. The freeze-drying box as described in claim 1, characterized in that, It also includes a pallet; the pallet is detachably mounted on the shelf.

8. The freeze-drying box as described in claim 1, characterized in that, The vacuum assembly includes a vacuum port and a vacuum detection port; the vacuum port is used to connect to a vacuum pump; the vacuum detection port is used to connect to a vacuum gauge tube.

9. The freeze-drying box as described in claim 1, characterized in that, It also includes an electrical port; the electrical port is located on the cylinder and is used to connect a sensor.

10. The freeze-drying box as described in claim 1, characterized in that, It also includes a drain outlet; the drain outlet is located at the bottom of the cylinder.

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