Multi-runner plate layer for freeze dryer

Abstract

The utility model provides a multi-runner plate layer for a freeze dryer, which comprises a frame and panels respectively welded on two sides of the frame, a plurality of division bars used for forming runners and arranged in a staggered manner are arranged between the panels, N groups of inflow ports and outflow ports are symmetrically arranged on the side wall of the frame, and the inflow ports and the outflow ports are communicated with the inside of the frame; the interior of the frame is divided by a plurality of division bars to form a plurality of main flow channels, N-1 division bars are arranged in the frame, the division bars extend into each main flow channel and divide the main flow channel where the division bars are located into N sub-flow channels, the sub-flow channels are not communicated with one another, and N is larger than or equal to 2; according to the utility model, a single flow channel is changed into a plurality of flow channels, the flow inlet and the flow outlet are additionally arranged, the circulation area is increased, the flow channel resistance is reduced, and the structure enables the circulation flow and the flow velocity of silicone oil to be obviously increased under the same pump pressure, so that the bottleneck problems of the temperature change rate and the temperature uniformity of a plate layer under the conditions of large specification and large load are effectively solved.

Description

Technical Field

[0001] The utility model relates to the field of freeze dryer plates, in particular to a multi-channel plate for a freeze dryer. Background Art

[0002] The plate is one of the key components in a freeze dryer. Its main function is to place the materials to be freeze-dried, transfer heat, and ensure the smooth completion of the freeze-drying process of the materials. During the operation of the freeze dryer, the heat-carrying medium is introduced into the inner cavity of the plate to achieve the effect of refrigeration or heating. Usually, a partition is also arranged in its inner cavity to adjust the flow direction of the heat-carrying medium, so that the inside and outside of the plate are fully heat-exchanged. In addition, the partition is also the support structure of the plate, and a certain layout density needs to be ensured. To meet the consistency of the freeze-drying process, it is required that the plate maintain a certain temperature uniformity during the freeze-drying process;

[0003] Industrial pharmaceutical freeze dryers usually use silicone oil as the heat-carrying medium. The silicone oil flows in the channels inside the plates of the drying chamber and releases the carried cold or heat to the materials. To make the best use of space, strengthen the heat exchange between the upper and lower surfaces of the plate, and ensure the stability of the temperature field, the plate channels are generally of a single-channel flat shape, and the silicone oil flows in a serpentine shape;

[0004] The inventor combined relevant technologies and found in practical applications that when the plate size is large or the load is large, it is extremely difficult to control the temperature change rate and temperature uniformity of the plate, and the production process requirements cannot be met. Summary of the Utility Model

[0005] In order to solve the problem in the prior art that when the plate size is large or the load is large, it is difficult to effectively control the temperature change rate and temperature uniformity of the plate, resulting in the inability to meet the process requirements for production, the utility model provides a multi-channel plate for a freeze dryer;

[0006] The multi-channel plate for a freeze dryer provided by the utility model adopts the following technical solution:

[0007] A multi-channel plate for a freeze dryer includes a frame and panels welded to both sides of the frame respectively. A number of partition strips for forming channels and arranged in a staggered manner are provided between the panels. N groups of inlet ports and outlet ports are symmetrically arranged on the side walls of the frame, and both the inlet ports and the outlet ports are connected to the inside of the frame; the inside of the frame is divided into a number of main channels by a number of partition strips. N - 1 spacer strips are arranged inside the frame, and the spacer strips extend into each main channel and divide the main channel where they are located into N sub-channels. The sub-channels do not communicate with each other, where N≥2;

[0008] Furthermore, a group of inlet ports and outlet ports are independently arranged at both ends of each sub-channel;

[0009] Further, the extending directions of the multiple inflow ports and the multiple outflow ports are staggered with each other outside the frame;

[0010] Further, the head and tail of adjacent main channels are connected end to end;

[0011] Further, the widths of the shunt channels are all the same.

[0012] In summary, the beneficial effects of the present utility model are as follows:

[0013] By providing a plurality of spacer bars and multiple groups of inflow ports and outflow ports, the present utility model changes a single channel into multiple channels while reducing the number of turns and the flow path length of the channels, thereby effectively increasing the flow area and reducing the channel resistance. With such a structural arrangement, the silicone oil circulation flow rate and velocity are significantly increased under the same pump pressure, thus effectively solving the bottleneck problems of the plate layer temperature change rate and temperature uniformity under large specifications and large loads. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front view sectional schematic diagram of the specific structure of the first embodiment of the present utility model;

[0015] Figure 2 It is a sectional schematic diagram of the main channel after hiding the spacer bars in the first embodiment of the present utility model;

[0016] Figure 3 It is a front view sectional schematic diagram of the specific structure of the second embodiment of the present utility model;

[0017] Figure 4 It is a top view sectional schematic diagram of a part of the structure of the present utility model.

[0018] As shown in the figure: 1 - frame, 2 - partition bar, 3 - spacer bar, 4 - panel, 6 - inflow port, 7 - outflow port, 8 - main channel, 9 - shunt channel. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following further describes the present utility model in detail with reference to the attached Figure 1 - attached Figure 4 :

[0020] An embodiment of the present utility model discloses a multi-channel plate layer for a freeze dryer, as Figures 1-4As shown in the figure, a multi-channel plate layer for a freeze dryer of the present utility model includes a frame 1 and panel boards 4 welded to both sides of the frame 1 respectively. Between the panel boards 4, a number of partition bars 2 for forming channels and arranged in a staggered manner are provided. On the side walls of the frame 1, N groups of inflow ports 6 and outflow ports 7 are symmetrically arranged. Both the inflow ports 6 and the outflow ports 7 are connected to the inside of the frame 1; the inside of the frame 1 is divided by a number of partition bars 2 into a number of main channels 8. Inside the frame 1, N - 1 spacer bars 3 are provided. The spacer bars 3 extend into each main channel 8 and divide the main channel 8 where they are located into N sub-channels 9. The sub-channels 9 do not communicate with each other, where N≥2;

[0021] Figure 1 , Figure 2 This is the first embodiment of the present utility model. In this embodiment, there are two groups of inflow ports 6 and outflow ports 7. One end of each partition bar 2 is connected to the frame 1 to form the main channel 8. To facilitate seeing the distribution of the main channels 8, Figure 2 Figure 8 is a schematic diagram of the main channel 8 after hiding the spacer bar 3. The adjacent main channels 8 are connected end to end, and the silicone oil flows in a curved path in the main channel 8. The shape and installation position of the spacer bar 3 are as Figure 1 shown. In this embodiment, the number of spacer bars 3 is one, which is arranged along the main channel 8 from the inflow port 6 until the outflow port 7 and divides the main channel 8 into two non-communicating sub-channels 9. And at both ends of each sub-channel 9, a group of inflow ports 6 and outflow ports 7 are independently arranged.

[0022] Figure 3 This is the second embodiment of the present utility model. In the second embodiment, there are three groups of inflow ports 6 and outflow ports 7. Since the structural schematic diagram after hiding the spacer bar 3 in this embodiment only differs from Figure 2 in the number of inflow ports 6 and outflow ports 7, reference can be made to Figure 2 . The shape and installation position of the spacer bar 3 are as Figure 3 shown. In this embodiment, the number of spacer bars 3 is two, which are arranged side by side along the main channel 8 from the inflow port 6 until the outflow port 7 and divide the main channel 8 into three non-communicating sub-channels 9. And at both ends of each sub-channel 9, a group of inflow ports 6 and outflow ports 7 are independently arranged; through the second embodiment, the structural characteristics when the number of inflow ports 6 and outflow ports 7 continues to increase can be inferred, so the embodiments are not further expanded.

[0023] In the first embodiment and the second embodiment, by providing a plurality of spacer bars 3 and multiple groups of inflow ports 6 and outflow ports 7, while changing a single flow channel into a multi-flow channel, the number of flow channel reversals and the flow path length are reduced, thereby effectively increasing the flow area and reducing the flow channel resistance; the multi-flow channel structure completely separates the fluid between the shunt channels 9, and the fluids in the multiple flow channels are completely isolated and flow independently. Through such a structural arrangement, not only the silicone oil circulation flow rate and velocity are effectively increased under the same pump pressure, but also the heat exchange effect is enhanced, thereby effectively solving the bottleneck problems of the plate layer temperature change rate and temperature uniformity under large specifications and large load conditions; preferably, the multiple inflow ports 6 and the multiple outflow ports 7 are staggered with each other in the extending direction outside the frame 1; preferably, the widths of the shunt channels 9 are the same.

[0024] The implementation principle of the embodiment of the present utility model is as follows:

[0025] Silicone oil is simultaneously introduced into the multiple inflow ports 6, the silicone oil enters the main flow channel 8 and is separated by the spacer bars 3, and then enters different shunt channels 9. The silicone oil flows back and forth along its respective shunt channels 9 until it flows out from the corresponding outflow port 7.

[0026] The above shows and describes the basic principles, main features and advantages of the present utility model. Each component mentioned in the present utility model is a common technology in the existing field. Those skilled in the art of this industry should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-channel plate layer for a freeze dryer, comprising a frame (1) and panels (4) respectively welded to both sides of the frame (1), wherein a plurality of staggered spacers (2) for forming channels are arranged between the panels (4), characterized in that: The side wall of the frame (1) is symmetrically provided with N groups of inlets (6) and outlets (7), and the inlets (6) and outlets (7) are both connected to the interior of the frame (1); the interior of the frame (1) is divided by a plurality of spacers (2) to form a plurality of main channels (8), and the interior of the frame (1) is provided with N-1 spacers (3), and the spacers (3) extend into each main channel (8) and divide the main channel (8) where they are located into N branch channels (9), and the branch channels (9) are not connected to each other, wherein N≥2.

2. The multi-channel plate layer for a freeze dryer according to claim 1, characterized in that: Each of the branch channels (9) is independently provided with a group of inlet ports (6) and outlet ports (7) at both ends.

3. The multi-channel plate layer for a freeze dryer according to claim 2, characterized in that: The plurality of inlet ports (6) and the plurality of outlet ports (7) are staggered with respect to each other in the direction of extension of the outer side of the frame (1).

4. The multi-channel plate layer for a freeze dryer according to claim 1, characterized in that: Adjacent main channels (8) are connected end to end.

5. The multi-channel plate layer for a freeze dryer according to claim 1, characterized in that: The widths of the branch channels (9) are all the same.

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