Freeze dryer plate layer structure with weighing function

Abstract

The utility model discloses a freeze dryer plate layer structure with a weighing function, which belongs to the technical field of freeze dryers and comprises a fixing frame and a weighing frame, the fixing frame is uniformly and fixedly connected with a plurality of horizontally arranged heating plates along the height direction of the fixing frame, heating channels are arranged in the heating plates, two ends of each heating channel are respectively connected with a liquid inlet pipe and a liquid outlet pipe, and the weighing frame is fixedly connected with the fixing frame. A tension and compression sensor is arranged between the weighing frame and the fixing frame, the bottom of the weighing frame is arranged in a suspended mode, a plurality of horizontally-arranged layer plates are evenly and fixedly connected to the weighing frame in the height direction of the weighing frame, a heat transfer through hole is formed in the middle of each layer plate, one layer plate is arranged between every two adjacent heating plates, and the layer plates and the heating plates do not make contact with each other. According to the freeze dryer plate layer structure with the weighing function, the situation that a product is not completely dried and the operation of equipment is finished can be prevented, the freeze-drying effect is good, and the consistency of the product quality can be ensured.

Description

Technical Field

[0001] This utility model belongs to the field of freeze dryer technology, and in particular relates to a freeze dryer plate structure with weighing function. Background Technology

[0002] Freeze dryers are suitable for drying high-grade raw materials, traditional Chinese medicine slices, biological materials, wild vegetables, dehydrated vegetables, food, fruits, chemicals, pharmaceutical intermediates, and other materials. The dried materials have a longer shelf life and are easier to transport. However, existing freeze dryers have the following problems: 1. They can only perform ordinary freezing and drying on the materials inside, requiring weighing before and after freezing to obtain complete freezing data. This process can easily lead to situations where the product is not fully dried, but the freeze dryer mistakenly considers it qualified and ends the operation prematurely, resulting in cumbersome operation and low efficiency. 2. Uneven drying of raw materials on the material trays inside the drying chamber leads to inconsistent product quality.

[0003] To solve the above problems, a new type of freeze dryer plate structure is needed. Utility Model Content

[0004] The purpose of this invention is to provide a freeze dryer plate structure with a weighing function, which can prevent the freeze dryer from mistakenly believing that the product is qualified and ending the operation before the product is completely dried. This simplifies the operation of the freeze dryer, improves work efficiency, provides good freeze-drying effect, and ensures the consistency of product quality.

[0005] To achieve the above objectives, this utility model provides a freeze dryer plate structure with weighing function, including a fixed frame and a weighing frame. The fixed frame has several horizontally arranged heating plates uniformly fixedly connected along its height direction. Each heating plate has a heating channel, and both ends of the heating channel are connected to an inlet pipe and an outlet pipe fixed on the heating plate, respectively. A tension / compression sensor is provided between the weighing frame and the fixed frame. The bottom end of the tension / compression sensor is fixedly connected to the top plate of the fixed frame, and the top end of the tension / compression sensor is fixedly connected to the top plate of the weighing frame. The bottom of the weighing frame is suspended. Several horizontally arranged shelves are uniformly fixedly connected along its height direction on the weighing frame. Each shelf has a heat transfer hole in its middle. One shelf is provided between two adjacent heating plates, and the shelf and the heating plate do not contact each other.

[0006] Preferably, the inlet pipe and the outlet pipe are symmetrically arranged at one end of the heating plate. An isolation plate is provided within the heating channel, extending along the length of the heating plate. One side of the isolation plate has a heating chamber connected to the inlet pipe, and the other side has a reflux chamber connected to the outlet pipe. A connecting hole is provided at the end of the isolation plate away from the inlet and outlet pipes. The heating chamber contains flow dividers and guide plates evenly distributed along the length of the isolation plate, alternating between the flow dividers and guide plates. The top and bottom surfaces of the flow dividers are respectively... The top and bottom surfaces of the heating chamber are sealed together. Gaps are left between the two ends of the diverter plate and the two side walls of the heating chamber, respectively. The top and bottom surfaces of the guide plate are sealed together with the top and bottom surfaces of the heating chamber, respectively. One end of the guide plate is sealed together with the side wall of the heating chamber, and a gap is left between the other end of the guide plate and the side wall of the heating chamber. An even number of guide plates and the isolation plate are sealed together starting from the end where the liquid inlet pipe is located, and a gap is left between an odd number of guide plates and the isolation plate starting from the end where the liquid inlet pipe is located.

[0007] Preferably, the top surface of the shelf is provided with guide flanges on both sides.

[0008] Preferably, a handle is fixedly connected to the top of the mounting bracket.

[0009] Preferably, the tension / compression sensor is connected to the PLC.

[0010] Therefore, the freeze dryer plate structure with weighing function adopted by this utility model has the following beneficial effects:

[0011] 1. By using tension and compression sensors to transmit material weight signals before and after freeze-drying to the PLC, the PLC can determine whether the freeze-drying endpoint has been reached based on the calculated material weight reduction ratio. This prevents the freeze dryer from mistakenly deeming the product qualified and ending the operation before it is fully dried, thereby simplifying the operation of the freeze dryer and improving work efficiency.

[0012] 2. By utilizing the alternating arrangement of heating plates and shelves, uniformity during drying is ensured, thereby improving the freeze-drying effect and guaranteeing consistent product quality.

[0013] 3. Utilize isolation plates, flow dividers, and guide plates to increase the heat transfer efficiency and amount between the heating plate and the high-temperature liquid, while also improving the temperature uniformity on the heating plate and thus enhancing the uniformity of drying.

[0014] 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

[0015] Figure 1 This is a schematic diagram of an embodiment of a freeze dryer plate structure with weighing function according to the present invention;

[0016] Figure 2 This is a schematic diagram of the heating channel inside the heating plate in an embodiment of a freeze dryer with weighing function according to the present invention.

[0017] Figure 3 This is a schematic diagram of the structure of the middle layer of a freeze dryer with weighing function according to an embodiment of the present invention.

[0018] In the diagram: 1. Fixing frame; 2. Weighing frame; 3. Heating plate; 4. Inlet pipe; 5. Outlet pipe; 6. Tension / compression sensor; 7. Shelf; 8. Heat transfer through hole; 9. Isolation plate; 10. Heating chamber; 11. Return chamber; 12. Connecting hole; 13. Diverter plate; 14. Guide plate; 15. Guide flange; 16. Handle. Detailed Implementation

[0019] 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.

[0020] 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.

[0021] Example

[0022] Reference Figure 1-3 As shown, this embodiment provides a freeze dryer shelf structure with weighing function, including a fixed frame 1 and a weighing frame 2. Several horizontally arranged heating plates 3 are uniformly fixedly connected to the fixed frame 1 along its height direction. Each heating plate 3 has a heating channel, with both ends connected to an inlet pipe 4 and an outlet pipe 5 fixed to the heating plate 3, respectively. A tension / compression sensor 6 is provided between the weighing frame 2 and the fixed frame 1. The bottom end of the tension / compression sensor 6 is fixedly connected to the top plate of the fixed frame 1, and the top end of the tension / compression sensor 6 is fixedly connected to the top plate of the weighing frame 2. The bottom of the weighing frame 2 is suspended. Several horizontally arranged shelves 7 are uniformly fixedly connected to the weighing frame 2 along its height direction. Each shelf 7 has a heat transfer hole 8 in its center. A shelf 7 is provided between two adjacent heating plates 3, and the shelf 7 and the heating plate 3 do not contact each other.

[0023] In use, the fixing frame 1 is fixed inside the drying chamber of the freeze dryer to support the weighing frame 2. The material tray containing the material is placed on the shelf 7 to fix the material tray. Then, the drying chamber of the freeze dryer is closed and the freeze dryer is started. After the freeze dryer starts, high-temperature liquid, such as silicone oil, is continuously introduced into the heating plate 3 through the liquid inlet pipe 4 and the liquid outlet pipe 5 to heat the heating plate 3. After the heating plate 3 heats up, it heats and dries the material in the material tray. Since there is a shelf 7 between two adjacent heating plates 3, the material on each material tray is heated evenly, thus ensuring uniformity during drying, improving the freeze-drying effect, and ensuring the consistency of product quality. During the drying process, the tension and pressure sensor 6 detects the overall weight of the weighing frame 2 in real time. The weight difference and the initial weight can be used to calculate the weight reduction ratio of the material. The weight reduction ratio is used to determine whether the freeze-drying endpoint has been reached. This can prevent the freeze dryer from mistakenly thinking that the product is qualified and ending the operation before the product is completely dried, thus simplifying the operation of the freeze dryer and improving work efficiency.

[0024] In a further optimized design, the inlet pipe 4 and outlet pipe 5 are symmetrically arranged at one end of the heating plate 3, and an isolation plate 9 is provided in the heating channel along the length of the heating plate 3. A heating chamber 10 connected to the inlet pipe 4 is provided on one side of the isolation plate 9, and a return chamber 11 connected to the outlet pipe 5 is provided on the other side of the isolation plate 9. A connecting hole 12 is provided at the end of the isolation plate 9 away from the inlet pipe 4 and outlet pipe 5, allowing the liquids in the heating chamber 10 and the return chamber 11 to connect. A flow divider plate 13 and a flow guide plate 14 are evenly distributed along the length of the isolation plate 9 within the heating chamber 10, and are arranged alternately. The top and bottom surfaces of the flow divider plate 13 are sealed to the top and bottom surfaces of the heating chamber 10, respectively. Gaps are left between the two ends of the flow divider plate 13 and the two side walls of the heating chamber 10, respectively. The flow divider plate 13 is used to increase the contact area between the high-temperature liquid and the heating plate 3, thereby increasing the heat conduction efficiency. The top and bottom surfaces of the guide plate 14 are sealed to the top and bottom surfaces of the heating chamber 10, respectively. One end of the guide plate 14 is sealed to the side wall of the heating chamber 10, and a gap is left between the other end of the guide plate 14 and the side wall of the heating chamber 10. The guide plate 14 is used to guide the high-temperature liquid, allowing the high-temperature liquid to move along multiple connected S-shaped trajectories, increasing the contact time between the high-temperature liquid and the heating plate 3, thereby achieving sufficient heat transfer. Even-numbered guide plates 14 are sealed to the isolation plate 9 starting from the end where the liquid inlet pipe 4 is located, while odd-numbered guide plates 14 are left with gaps between them.

[0025] In use, the arrangement of the flow divider 13 and the guide plate 14 in the heating chamber 10 enables the high-temperature liquid to flow in an S-shaped meandering manner within the heating plate 3, thereby achieving uniform heating of the heating plate 3 by the high-temperature liquid. The return chamber 11 is used on the one hand to reverse the flow of the high-temperature liquid, so that the inlet pipe 4 and the outlet pipe 5 can be set at the same end of the heating plate 3, thus facilitating the connection and fixation of the inlet pipe 4 and the outlet pipe 5 on the freeze dryer. On the other hand, it is used to balance the temperature difference between the two ends of the heating plate 3, further ensuring the uniformity of heating of the heating plate 3.

[0026] In a further optimized design, guide flanges 15 are provided on both sides of the top surface of the shelf 7. The guide flanges 15 can guide the material pallet, thereby facilitating the placement of the material pallet on the shelf 7 or the removal of the material pallet from the shelf 7.

[0027] In a further optimized design, a handle 16 is fixedly connected to the top of the mounting bracket 1. The handle 16 facilitates the assembly and disassembly of the entire freeze dryer's panel structure.

[0028] A further optimized solution involves connecting the tension / compression sensor 6 to the PLC. The PLC can receive the overall weight signal of the weighing frame 2 detected by the tension / compression sensor 6 in real time, and use this signal and the initial weight signal to calculate the material weight reduction ratio, eliminating the need for manual calculation. In operation, the PLC can also be connected to an alarm. When the PLC determines that the freeze-drying endpoint has been reached based on the weight reduction ratio, it controls the alarm to issue an alarm signal. This prevents the freeze dryer from mistakenly deeming the product qualified and ending the operation before it is fully dried, thus simplifying the operation of the freeze dryer and improving work efficiency.

[0029] Therefore, the freeze dryer plate structure with weighing function of the present invention can prevent the freeze dryer from mistakenly believing that the product is qualified and ending the operation before the product is completely dried. The freeze drying effect is good and the consistency of product quality can be guaranteed.

[0030] 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.

[0031] 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 plate structure with weighing function, characterized in that: The weighing rack includes a fixed frame (1) and a weighing rack (2). The fixed frame (1) is uniformly fixedly connected with several horizontally arranged heating plates (3) along its height direction. The heating plates (3) are provided with heating channels. The two ends of the heating channels are respectively connected to the inlet pipe (4) and the outlet pipe (5) fixed on the heating plates (3). A tension and compression sensor (6) is provided between the weighing rack (2) and the fixed frame (1). The bottom end of the tension and compression sensor (6) is fixedly connected to the top plate of the fixed frame (1), and the top end of the tension and compression sensor (6) is fixedly connected to the top plate of the weighing rack (2). The bottom of the weighing rack (2) is suspended. Several horizontally arranged shelves (7) are uniformly fixedly connected to the weighing rack (2) along its height direction. The middle part of the shelf (7) is provided with a heat transfer hole (8). A shelf (7) is provided between two adjacent heating plates (3). The shelf (7) and the heating plate (3) do not contact each other.

2. The freeze dryer plate structure with weighing function according to claim 1, characterized in that: The inlet pipe (4) and the outlet pipe (5) are symmetrically arranged at one end of the heating plate (3). An isolation plate (9) is provided in the heating channel along the length of the heating plate (3). A heating chamber (10) communicating with the inlet pipe (4) is provided on one side of the isolation plate (9), and a return chamber (11) communicating with the outlet pipe (5) is provided on the other side of the isolation plate (9). A connecting hole (12) is provided at the end of the isolation plate (9) away from the inlet pipe (4) and the outlet pipe (5). A flow divider plate (13) and a guide plate (14) evenly distributed along the length of the isolation plate (9) are provided in the heating chamber (10). The flow divider plate (13) and the guide plate (14) are arranged alternately. The flow divider plate (13) has... The top and bottom surfaces are sealed to the top and bottom surfaces of the heating chamber (10), respectively. The two ends of the diverter plate (13) are respectively left with gaps between the two side walls of the heating chamber (10). The top and bottom surfaces of the guide plate (14) are respectively sealed to the top and bottom surfaces of the heating chamber (10). One end of the guide plate (14) is sealed to the side wall of the heating chamber (10). The other end of the guide plate (14) is left with gaps between the side wall of the heating chamber (10). Starting from the end where the liquid inlet pipe (4) is located, an even number of guide plates (14) are sealed to the isolation plate (9). Starting from the end where the liquid inlet pipe (4) is located, an odd number of guide plates (14) are left with gaps between the isolation plate (9).

3. The freeze dryer plate structure with weighing function according to claim 1, characterized in that: The top surface of the shelf (7) is provided with guide flanges (15) on both sides.

4. The freeze dryer plate structure with weighing function according to claim 1, characterized in that: The top of the mounting bracket (1) is fixedly connected to a handle (16).

5. The freeze dryer plate structure with weighing function according to claim 1, characterized in that: The tension / compression sensor (6) is connected to the PLC.

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