Novel freeze dryer

Abstract

The utility model discloses a novel freeze dryer which comprises a box body and a cold trap communicated with the box body, a vacuum jacket is arranged outside the box body, an exhaust port, an air inlet and a vacuumizing mechanism are arranged on the vacuum jacket, and the cold trap is communicated with the air inlet of the vacuum jacket through a pipeline and can be used for introducing low-temperature media into the vacuum jacket. According to the novel freeze dryer, through the arrangement of the vacuum jacket, the sterilized freeze dryer box body can be rapidly cooled through low-temperature gas produced by the cold trap, and the problems of shutdown and heat preservation failure caused by the fact that cooling water of a traditional freeze dryer box body is prone to leakage are solved. Moreover, the vacuumizing mechanism is arranged, so that a vacuum environment can be kept in the vacuum jacket, the cold loss of the freeze dryer box body is reduced, and a good heat preservation effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of box heat preservation, and more specifically, to a novel freeze dryer. Background Art

[0002] To meet the sterility requirements for pharmaceuticals, freeze dryers typically need to be cleaned and sterilized at high temperatures before operation. During this process, cooling water is generally used for cooling after sterilization. However, during manufacturing and equipment operation, poor weld quality often occurs, and repeated changes in high and low temperature internal stresses can cause weld cracking. Cooling water leaks through the cracks, leading to failure of the cabinet insulation. After the cabinet insulation, equipment maintenance is often very troublesome and difficult, often resulting in the freeze dryer not being able to operate normally. Furthermore, during the cooling process, some freeze dryers also have insufficient water in the cooling jacket, resulting in poor cooling effect after sterilization and long cooling times, which seriously affects the use and production efficiency of the freeze dryer.

[0003] Therefore, in view of the above problems, there is an urgent need for a freeze-drying machine cabinet cooling structure that can solve the shutdown problem and insulation failure problem caused by the easy leakage of cooling water in the existing freeze-drying machine cabinet. Utility Model Content

[0004] The present utility model aims to provide a novel freeze dryer. To achieve the above-mentioned object, the present utility model provides the following technical solution: a novel freeze dryer comprising a housing and a cold trap connected to the housing; a vacuum jacket is disposed outside the housing, the vacuum jacket being provided with an exhaust port, an air inlet, and a vacuum pumping mechanism; the cold trap is connected to the air inlet of the vacuum jacket via a pipeline, and can be used to introduce a low-temperature medium into the vacuum jacket.

[0005] Preferably, the cold trap comprises a freezing coil and a refrigeration assembly;

[0006] The cold trap is provided with an air inlet and an air outlet at opposite ends thereof for the entry and discharge of compressed air, respectively. The refrigeration coil is arranged in the cold trap and connected to the refrigeration component to cool the entering compressed air. The air inlet of the cold trap is provided with a cooling air inlet valve, and the air outlet of the cold trap is provided with a cooling air exhaust valve.

[0007] Preferably, the refrigeration component is arranged outside the cold trap and connected to the refrigeration coil in the cold trap.

[0008] Preferably, the vacuum mechanism includes a vacuum pump and a vacuum evacuation valve. The vacuum pump is connected to the vacuum jacket, and a vacuum evacuation valve is provided on the pipeline connecting the vacuum pump and the vacuum jacket.

[0009] Preferably, the vacuum jacket comprises a communication port for communicating the refrigeration mechanism and the vacuum mechanism, an exhaust port for discharging high-temperature gas, an outer cover plate for sealing, and a support connecting profile for connecting the inner wall of the box and the outer cover plate;

[0010] The outer cover plate is arranged on the inner wall of the box by the support connecting profile, a sealable vacuum interlayer is formed between the outer cover plate and the inner wall of the box, and the communication port and the exhaust port are both sealably arranged at the end of the vacuum interlayer.

[0011] Preferably, a high-temperature discharge valve is arranged at the exhaust port, a vacuum cutoff valve is arranged at the communication port, and the vacuum jacket controls the on-off of the vacuum interlayer, the vacuum mechanism and the refrigeration mechanism through the vacuum cutoff valve.

[0012] The novel freeze dryer has the advantages that: the low-temperature gas medium manufactured by the cold trap can be wrapped on the freeze dryer outside through the vacuum jacket, so that the freeze dryer box after sterilization can be rapidly cooled, and the problem of machine stoppage and heat preservation failure caused by the leakage of the cooling water of the traditional freeze dryer box is avoided.

[0013] In addition, the vacuumizing mechanism is arranged, so that the vacuum jacket can maintain a vacuum environment after cooling, thereby reducing the cold loss of the freeze dryer box, achieving good heat preservation effect, and enabling the freeze dryer box to be in a low-temperature state for a long time. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a schematic view of the overall structure of the novel freeze dryer.

[0015] BRIEF DESCRIPTION OF REFERENCE NUMERALS:

[0016] 1, vacuum jacket; 10, box; 11, exhaust port; 12, vacuum cutoff valve; 13, vacuumizing mechanism; 14, vacuum exhaust valve; 15, outer cover plate; 16, support connecting profile; 17, inner wall of the box;

[0017] 2, cold trap; 21, refrigeration assembly; 22, refrigeration coil; 23, cooling air inlet valve; 24, cooling air outlet valve. DETAILED DESCRIPTION

[0018] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a variety of ways beyond the specific embodiments described herein without departing from the scope of the present application. Accordingly, those of ordinary skill in the art will recognize that there are numerous variations and permutations of the present application and examples that can be derived from the description herein, and that the specific embodiments described are examples of the present application, and not limitations.

[0019] In the description of the utility model, it is necessary to explain that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second" and "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs. The terms used in the specification of the utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the utility model.

[0021] As Figure 1 shown, the utility model provides a novel freeze dryer, it includes box 10 and with the cold trap 2 of box 10 intercommunication, box 10 is equipped with vacuum jacket 1, vacuum jacket 1 is equipped with exhaust port 11, air inlet and vacuumizing mechanism 13, cold trap 2 is communicated with the air inlet of vacuum jacket 1 through pipeline, can be used to the low-temperature medium into vacuum jacket 1.

[0022] In this embodiment, the novel freeze dryer is provided with vacuum jacket 1, so that the low-temperature gas medium manufactured by the cold trap 2 can be wrapped around the freeze dryer outside the vacuum jacket 1, thereby realizing rapid cooling of the freeze dryer box after sterilization, and the low-temperature gas medium effectively avoids the shutdown problem and heat preservation failure problem caused by the easy leakage of the cooling water of the traditional freeze dryer box. Further, the vacuumizing mechanism 13 is provided, so that after the freeze dryer box is cooled by the low-temperature gas medium, the vacuumizing mechanism 13 is used to perform vacuumizing treatment on the vacuum jacket 1, so that the vacuum jacket 1 maintains a vacuum environment, thereby reducing the cold loss of the freeze dryer box and achieving good heat preservation effect, so that the freeze dryer box can be in a low-temperature state for a long time.

[0023] Referring to Figure 1 , the cold trap 2 includes a refrigeration coil 22 and a refrigeration assembly 21. The cold trap 2 is provided with an air inlet and an air outlet at opposite ends thereof for the compressed air to enter and discharge. The air outlet of the cold trap 2 is communicated with the air inlet of the vacuum jacket 1. The refrigeration coil 22 is arranged in the cold trap 2 and connected with the refrigeration assembly 21 to cool the entering compressed air. The air inlet of the cold trap 2 is provided with a cooling air inlet valve 23, and the air outlet of the cold trap 2 is provided with a cooling air outlet valve 24. The refrigeration assembly 21 is arranged outside the cold trap 2 and connected with the refrigeration coil 22 in the cold trap 2.

[0024] In the embodiment, the compressed air enters the cold trap 2 from the air inlet of the cold trap 2, is cooled and refrigerated by the refrigeration coil 22 to reduce the temperature of the compressed air, and then the air outlet of the cold trap 2 is opened to allow the cooled compressed air to enter the vacuum jacket 1 to cool and refrigerate the vacuum layer in the high-temperature state. The refrigeration coil 22 is cooled to -50 DEG C to -80 DEG C before the compressed air is introduced.

[0025] In an embodiment, the vacuum mechanism includes a vacuum pump and a vacuum evacuation valve 14, the vacuum pump is connected with the vacuum jacket 1, and the pipeline connected with the vacuum jacket 1 is provided with the vacuum evacuation valve 14.

[0026] In the embodiment, when the vacuum layer in the vacuum jacket 1 is cooled to a temperature lower than -55 DEG C by the low-temperature compressed air, the high-temperature exhaust valve, the cooling air exhaust valve 24 and the cooling air inlet valve 23 are closed, the vacuum isolation valve 12 and the vacuum evacuation valve 14 are opened, and the vacuum pump is started to evacuate the vacuum layer to a pressure in the range of 0-10 PA, so that the gas in the vacuum jacket 1 is not convection, the cold energy loss in the box 10 is reduced, and the heat preservation effect is achieved.

[0027] In a preferred embodiment, the cover plate 15 is wrapped on the inner wall 17 of the box through the support connecting profile 16, a sealable vacuum layer is formed between the cover plate 15 and the inner wall 17 of the box, the communication port and the exhaust port 11 are both sealably arranged at the end of the vacuum layer, the high-temperature exhaust valve is arranged at the exhaust port 11, the vacuum isolation valve 12 is arranged at the communication port, and the vacuum jacket 1 controls the on-off of the vacuum layer and the vacuum mechanism and the refrigeration mechanism through the vacuum isolation valve 12.

[0028] In an embodiment, the vacuum layer is composed of the layer space of the cover plate 15, the support connecting profile 16 and the inner wall 17 of the box 10 which are vacuum sealed, the support connecting profile 16 is first welded and connected with the inner wall 17 of the box, the cover plate 15 seals the box 10 as a whole after being integrally connected with the support connecting profile 16, the cover plate 15 of the box 10 is punched, the punching position is located in the middle of the support connecting profile 16 of the box 10, the hole is filled and welded, the welding strength of the cover plate 15 of the box 10 and the support connecting profile 16 is ensured, and the strength of the freeze-drying machine box 10 is effectively improved through the arrangement of the vacuum jacket 1.

[0029] The utility model also provides a kind of novel freeze-drying machine's use method, and use method is based on above-mentioned novel freeze-drying machine implementation, and the use method of cooling includes the following steps:

[0030] A, refrigeration: after the sterilization of the freeze dryer is completed, the refrigeration assembly 21 provides a refrigeration source for the refrigeration coil 22 in the cold trap 2, and the refrigeration coil 22 is cooled to -50 to -80 DEG C;

[0031] B, cooling medium: the cooling air inlet valve 23 is opened, the compressed air is introduced into the cold trap 2 through the cooling air inlet valve 23, and the heat exchange is performed through the refrigeration coil 22 after being cooled, and the cooling air outlet valve 24 is opened, and the compressed air after heat exchange is discharged through the cooling air outlet valve 24;

[0032] C, cooling: the vacuum partition valve 12 is opened, and the low-temperature compressed air discharged through the cooling air outlet valve 24 enters the vacuum interlayer through the communication port through the vacuum partition valve 12, and the heat exchange is performed on the high-temperature vacuum interlayer to cool the high-temperature vacuum interlayer;

[0033] D, exhaust: after the vacuum interlayer is cooled, the high-temperature exhaust valve at the exhaust port 11 is opened, and the compressed air after heat exchange is discharged through the exhaust port 11.

[0034] When the vacuum jacket 1 of the novel freeze dryer needs to be insulated, the use method of the insulation includes the following steps:

[0035] After the high-temperature exhaust valve, the cooling air outlet valve 24 and the cooling air inlet valve 23 are closed, the vacuum partition valve 12 and the vacuum exhaust valve 14 are opened, the vacuum pump is started, the vacuum pump is used to vacuumize the vacuum interlayer to 0-10 PA, and then the vacuum pump and the vacuum partition valve 12 are closed.

[0036] The technical features of the above embodiments can be combined arbitrarily, and in order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combination of the technical features does not exist contradictory, it should be considered that it is within the scope of the description.

[0037] The above embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the utility model patent. It should be pointed out that for ordinary skilled persons in the art, on the premise of not departing from the concept of the utility model, a number of modifications and improvements can be made, which belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A novel freeze dryer comprising a cabinet (10) and a cold trap (2) in communication with the cabinet (10), characterized in that: the cabinet (10) is externally provided with a vacuum jacket (1) and a vacuum pumping mechanism (13) in communication with the vacuum jacket (1), the vacuum jacket (1) is provided with an exhaust port (11), an air inlet port, the cold trap (2) is in communication with the air inlet port of the vacuum jacket (1) through a pipeline, and the pipeline can be used to introduce low-temperature medium into the vacuum jacket (1).

2. The new lyophilizer as claimed in claim 1, wherein, the cold trap (2) comprises a refrigeration coil (22) and a refrigeration assembly (21); the cold trap (2) is provided with an air inlet port and an air outlet port at opposite ends thereof for the entry and exit of compressed air, the air outlet port of the cold trap (2) is in communication with the air inlet port of the vacuum jacket (1), the refrigeration coil (22) is arranged in the cold trap (2) and connected with the refrigeration assembly (21) to cool the entering compressed air, the air inlet port of the cold trap (2) is provided with a cooling air inlet valve (23), and the air outlet port of the cold trap (2) is provided with a cooling air outlet valve (24).

3. The new lyophilizer according to claim 2, characterized in that, the refrigeration assembly (21) is arranged outside the cold trap (2) and connected with the refrigeration coil (22) in the cold trap (2).

4. The new lyophilizer as claimed in claim 1, wherein, the vacuum mechanism comprises a vacuum pump and a vacuum evacuation valve (14), the vacuum pump is in communication with the vacuum jacket (1), and the pipeline through which the vacuum pump is in communication with the vacuum jacket (1) is provided with the vacuum evacuation valve (14).

5. The new lyophilizer as claimed in claim 1, wherein, the vacuum jacket (1) comprises a communication port for communicating the cold trap (2) and the vacuum pumping mechanism (13), the exhaust port (11) for discharging high-temperature gas, a cover plate (15) for sealing, and a support connecting profile (16) for connecting the inner wall (17) of the cabinet and the cover plate (15); the cover plate (15) is wrapped on the inner wall (17) of the cabinet through the support connecting profile (16), a sealable vacuum interlayer is formed between the cover plate (15) and the inner wall (17) of the cabinet, and the communication port and the exhaust port (11) are sealably arranged at the end of the vacuum interlayer.

6. The new lyophilizer according to claim 5, characterized in that, a high-temperature discharge valve is arranged at the exhaust port (11), a vacuum cutoff valve (12) is arranged at the communication port, the vacuum jacket (1) controls the on-off of the vacuum interlayer, the vacuum pumping mechanism (13) and the cold trap (2) through the vacuum cutoff valve (12).

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