A vacuum dryer

Abstract

The utility model relates to the technical field of vacuum drying, and disclose a vacuum drying machine, including the organism, the bottom end of organism is inlaid open, the inboard fixed coupling of organism has the baffle, the top fixed coupling of baffle has the outer tube, the inboard rotationally connected of outer tube has the inner tube, and the inner tube is opened and has a plurality of water leakage holes, the bottom of outer tube is linked with the water outlet pipe, the bottom of baffle is linked with the water storage mechanism, and the water storage mechanism is linked with the water outlet pipe, and the top of outer tube is provided with the drive mechanism for driving the rotation of inner tube, and the front end of organism is hinged with the door leaf, and the front end fixed coupling of door leaf has the handle, and the lock mechanism is arranged between the organism and door leaf, and the inboard of organism is provided with the vacuumizing mechanism for the inboard vacuumizing of organism, and the vacuumizing mechanism passes through the door leaf and is linked with the inboard of organism, the utility model discloses through setting up the water storage mechanism, and the water vapor that evaporates is condensed into liquid water and collects in the water storage mechanism, avoids the machine body in the residual water scale or impurity breed bacteria.

Description

Technical Field

[0001] This utility model relates to the field of vacuum drying technology, specifically a vacuum dryer. Background Technology

[0002] Drying is a crucial and common process in many industrial production and scientific research fields. For example, in the food processing industry, fresh ingredients need to be dried to extend their shelf life and facilitate storage and transportation; in the pharmaceutical industry, drying of drug raw materials and preparations is essential to ensuring drug quality and stability; and in chemical production, many chemical substances need to be dried after synthesis to meet usage standards or undergo further processing.

[0003] Traditional drying equipment, such as hot air circulating ovens, while meeting basic drying needs to a certain extent, has several significant shortcomings. Firstly, these devices typically use hot air to heat and dry materials. During this process, the moisture in the material is released into the surrounding environment as water vapor. However, for materials that are sensitive to drying conditions, easily oxidized, or heat-sensitive, hot air drying can easily lead to a decline in material quality, affecting their performance and usability. Secondly, when drying materials containing large amounts of moisture, traditional equipment struggles to remove the moisture quickly and effectively, resulting in low drying efficiency, prolonged production cycles, and increased production costs.

[0004] Furthermore, in certain special drying scenarios, such as for materials with complex shapes or porous structures, traditional drying equipment struggles to evenly remove moisture from the material, easily leading to uneven drying and affecting the overall quality of the material. Moreover, traditional drying equipment often consumes a lot of energy during operation, which is inconsistent with the current development trend of energy conservation, emission reduction, and green production.

[0005] To overcome the aforementioned shortcomings of traditional drying equipment, people began to explore new drying technologies. Vacuum drying technology emerged as a result. Its basic principle is to reduce the ambient pressure in a sealed container below atmospheric pressure, allowing the moisture in the material to rapidly vaporize and be extracted at a lower temperature, thereby achieving rapid and efficient drying. At the same time, it can effectively avoid problems such as oxidation and deterioration of materials at high temperatures, and is particularly suitable for drying heat-sensitive, easily oxidized, and high-moisture materials.

[0006] However, existing vacuum drying equipment still has some areas in its structural design that need improvement. For example, some vacuum drying equipment has an inadequate drainage design, and the moisture generated during the drying process cannot be discharged and collected in a timely and effective manner, which can easily lead to water accumulation inside the equipment, affecting its normal operation and drying effect.

[0007] Against this backdrop, developing a vacuum dryer with a reasonable structure, high drying efficiency, good drainage effect, stable operation, and flexible use is of great practical significance. Utility Model Content

[0008] (a) Technical problems to be solved The purpose of this invention is to solve the problem that some vacuum drying equipment has an unreasonable drainage design, and the water generated during the drying process cannot be discharged and collected in a timely and effective manner, which easily leads to water accumulation inside the equipment, affecting the normal operation of the equipment and the drying effect. Therefore, a vacuum dryer is proposed.

[0009] (II) Technical Solution The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A vacuum dryer includes a body with a hollowed-out bottom. A partition is fixedly connected to the inner side of the body, and an outer cylinder is fixedly connected to the top of the partition. An inner cylinder is rotatably connected to the inner side of the outer cylinder, and the inner cylinder has several drainage holes. A water outlet pipe is connected to the bottom of the outer cylinder, and a water storage mechanism is connected to the bottom of the partition. The water storage mechanism is connected to the water outlet pipe. A drive mechanism for rotating the inner cylinder is provided at the top of the outer cylinder. A door panel is hinged to the front of the body, and a handle is fixedly connected to the front of the door panel. A locking mechanism is provided between the body and the door panel. A vacuuming mechanism for drawing a vacuum inside the body is provided on the inner side of the body. The vacuuming mechanism passes through the door panel and is connected to the inner side of the body. A return pipe is provided at the front of the door panel, and a return valve is provided on the outer side of the return pipe. Four casters with limit mechanisms are provided at the bottom of the body.

[0010] Based on the above technical solution, the present invention can be further improved as follows.

[0011] Preferably, the water storage mechanism includes a water storage hopper, the bottom end of the partition is connected to the water storage hopper, the bottom end of the water storage hopper is connected to a drain pipe, and a drain valve is provided on the outside of the drain pipe.

[0012] Preferably, the driving mechanism includes a motor, the top end of the outer cylinder is fixedly connected to the motor, the rear end of the inner cylinder is fixedly connected to a rotating shaft, the rotating shaft is rotatably connected to the inner side of the outer cylinder, and the rotating shaft is connected to the output end of the motor through a transmission mechanism.

[0013] Preferably, the locking mechanism includes a first locking base, the front end of the door panel is fixedly connected to the first locking base, the front end of the first locking base is rotatably connected to a locking handle, the locking handle is provided with a plug-in part, the front end of the body is fixedly connected to a second locking base, the front end of the second locking base is fixedly connected to a latch, and the plug-in part is inserted into the inner side of the latch.

[0014] Preferably, the vacuuming mechanism includes a hose, the inner side of the door panel is fixedly connected to the hose, the other end of the hose passes through and extends to the inner side of the machine body, and an air pump is fixedly connected to the inner side of the machine body.

[0015] (III) Beneficial Effects Compared with the prior art, the technical solution of this application has the following beneficial technical effects: This invention incorporates a water storage mechanism, which condenses the evaporated water vapor into liquid water and collects it in the mechanism, thus preventing the growth of bacteria from residual scale or impurities in the machine. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram showing the relative positional relationship between the inner cylinder and the drainage hole of this utility model. Figure 3 This is a schematic diagram showing the relative positional relationship between the outer cylinder and the water outlet pipe of this utility model. Figure 4 This is a schematic diagram of the water storage mechanism of this utility model; Figure 5 This is a schematic diagram of the drive mechanism structure of this utility model; Figure 6 This is a schematic diagram of the locking mechanism of this utility model; Figure 7 This is a schematic diagram of the vacuum mechanism of this utility model.

[0017] In the diagram: 1. Body; 2. Partition; 3. Outer cylinder; 4. Inner cylinder; 5. Drain hole; 6. Water outlet pipe; 7. Water storage mechanism; 71. Water storage hopper; 72. Drain pipe; 73. Drain valve; 8. Drive mechanism; 81. Motor; 82. Rotating shaft; 83. Transmission mechanism; 9. Door panel; 10. Locking mechanism; 101. First locking base; 102. Locking handle; 103. Insertion part; 104. Second locking base; 105. Lock; 11. Vacuuming mechanism; 111. Hose; 112. Air pump; 12. Return pipe; 13. Return valve; 14. Casters; 15. Handle. Detailed Implementation

[0018] 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.

[0019] In the embodiments, by Figure 1-7Provided is a vacuum dryer, comprising a body 1, the bottom of which is hollowed out. A partition 2 is fixedly connected to the inner side of the body 1, and an outer cylinder 3 is fixedly connected to the top of the partition 2. An inner cylinder 4 is rotatably connected to the inner side of the outer cylinder 3. The inner cylinder 4 has several drainage holes 5. A water outlet pipe 6 is connected to the bottom of the outer cylinder 3. A water storage mechanism 7 is connected to the bottom of the partition 2 and is connected to the water outlet pipe 6. A drive mechanism 8 for driving the inner cylinder 4 to rotate is provided at the top of the outer cylinder 3. The front end of the body 1 is hinged to a door panel 9, and a handle 15 is fixedly connected to the front end of the door panel 9. A locking mechanism 10 is provided between the body 1 and the door panel 9. A vacuuming mechanism 11 for vacuuming the inside of the body 1 is provided on the inside of the body 1. The vacuuming mechanism 11 passes through the door panel 9 and is connected to the inside of the body 1. A return pipe 12 is provided at the front end of the door panel 9, and a return valve 13 is provided on the outside of the return pipe 12. Four casters 14 with limit mechanisms are provided at the bottom end of the body 1.

[0020] With the above setup, open door panel 9 and load the wet material into inner cylinder 4. Close door panel 9 and ensure a tight seal between machine body 1 and door panel 9 using locking mechanism 10, forming a closed drying chamber. Activate vacuum mechanism 11 to extract air from machine body 1, inner cylinder 4, and outer cylinder 3, creating a negative pressure (vacuum) state within the drying chamber. As the pressure decreases, the boiling point of water drops significantly. (A heating device is installed inside machine body 1, not shown in the diagram.) Heat is conducted to the material inside through the wall of outer cylinder 3. In a vacuum environment, the moisture in the material evaporates rapidly at low temperature. Simultaneously, drive mechanism 8 is activated, causing inner cylinder 4 to rotate slowly. Drainage holes 5 on the wall of inner cylinder 4 ensure that steam can escape freely while preventing material from falling. The rotation of inner cylinder 4 causes the material to be continuously lifted, tumbled, and dropped, achieving dynamic drying. This ensures uniform heating of the material, eliminating dead zones and preventing localized overheating or clumping. The water vapor generated by evaporation, under the action of vacuum pressure difference, enters the interlayer between the outer cylinder 3 and the inner cylinder 4 through the water leakage hole 5 of the inner cylinder 4. When the water vapor encounters the cooler wall of the outer cylinder 3, it condenses into liquid water. The condensate flows down the inclined surface of the outer cylinder 3 and flows into the water storage mechanism 7 through the water outlet pipe 6 for collection, facilitating subsequent centralized processing. After the preset drying time or humidity index is reached, the heating device and drive mechanism 8 are turned off first. The return valve 13 is slowly opened, allowing outside air to slowly enter the machine body 1 through the return pipe 12, breaking the vacuum state and balancing the internal and external pressures. This prevents material splashing or equipment damage due to sudden pressure relief. After pressure balance, the locking mechanism 10 and door panel 9 are opened to remove the dried material. The dryer can be easily moved to the required position using the four casters 14 at the bottom of the machine body 1. The limiting mechanism (usually a foot brake device) on the casters 14 can lock the casters to prevent accidental movement of the equipment during operation, ensuring safety and stability. The rotating design of the inner cylinder 4 keeps the material in a dynamic tumbling state, avoiding phenomena such as crusting, burnt exterior and raw interior, and uneven drying that are prone to occur in static drying. It can effectively remove bound water from the material, ensuring thorough drying and reducing the moisture content to an extremely low level, facilitating long-term storage. The evaporated water vapor is condensed into liquid water and collected in the water storage mechanism 7, preventing residual scale or impurities in the machine body 1 from breeding bacteria.

[0021] Reference Figure 1-7 The water storage mechanism 7 includes a water storage hopper 71, the bottom end of the partition 2 is connected to the water storage hopper 71, the bottom end of the water storage hopper 71 is connected to the drain pipe 72, and a drain valve 73 is provided on the outside of the drain pipe 72. The above structural setup ensures that the dryer has completed drying, and the vacuum mechanism 11 and heating system have completely stopped working. The most crucial step is to slowly introduce air into the machine body 1 through the reflux valve 13, allowing the internal pressure of the machine body 1 to completely balance with the external atmospheric pressure. It is strictly forbidden to open the drain valve 73 while the equipment is still under vacuum; otherwise, the external atmospheric pressure will violently impact the drain valve 73, potentially damaging the equipment or injuring personnel. Since the drain pipe 72 is usually located at the bottom of the equipment, a water tray or bucket should be prepared in advance and placed below the drain pipe 72 to collect the condensate that will be discharged. The operator manually opens the drain valve 73. Under gravity, all the condensate stored in the water tank 71 will immediately flow smoothly through the drain pipe 72 into the prepared collection container. The drainage process is quick and direct, usually completed within a few seconds. After the water in the water tank 71 is completely drained and the water flow stops, manually close the drain valve 73, ensuring it is tightly sealed, to prepare for the next drying operation. Remove and dispose of the collected condensate. If the equipment requires maintenance or is to be idle for an extended period, the water tank 71 can be cleaned to prevent residual scale or impurities from breeding bacteria.

[0022] Reference Figure 1-7 The drive mechanism 8 includes a motor 81. The top end of the outer cylinder 3 is fixedly connected to the motor 81, and the rear end of the inner cylinder 4 is fixedly connected to the rotating shaft 82. The rotating shaft 82 is rotatably connected to the inner side of the outer cylinder 3, and the rotating shaft 82 is connected to the output end of the motor 81 through a transmission mechanism 83. With the above structural setup, the operator starts the drying program via the equipment control panel. After confirming that the door panel 9 is tightly closed and the locking mechanism 10 is locked, the control system sends a start signal to the motor 81. The motor 81 is powered on and starts, its output shaft begins to rotate, generating initial power. The output shaft of the motor 81 is connected to the rotating shaft 82 of the inner cylinder 4 via the transmission mechanism 83. The transmission mechanism 83 is a key power conversion component, and it can typically employ one or more of the following methods: Gear drive: The output shaft of the motor 81 is connected to a driving gear, which meshes with a driven gear mounted on the rotating shaft 82 to transmit power. Belt drive: Pulleys are mounted on the output shaft of the motor 81 and the rotating shaft 82, respectively, and connected by a synchronous belt or V-belt. This method is simple in structure and can buffer and absorb vibration. Chain drive: The motor 81 and the sprockets on the rotating shaft 82 are connected by a chain. Reducer: The most common configuration is that the motor 81 is connected to a reducer, which then directly drives the rotating shaft 82. This is essential for the dryer because the inner cylinder 4 requires low speed and high torque, while the motor 81 typically outputs high speed and low torque. The reducer can perfectly handle this conversion. Power is ultimately transmitted through the transmission mechanism 83 to the rotating shaft 82, which is fixedly connected to the inner cylinder 4. The rotating shaft 82 rotates smoothly under the support of bearings inside the outer cylinder 3. Since the rotating shaft 82 is fixedly connected to the inner cylinder 4, the inner cylinder 4 rotates along with it. As the inner cylinder 4 rotates, the drainage holes 5 on its cylinder wall ensure steam flow, and after the material reaches a certain height, it falls under the influence of gravity. This process repeats continuously, achieving all-round, no-dead-angle tumbling of the material. The motor 81 is usually controlled by a frequency converter, which can achieve stepless speed regulation. The operator can set the most suitable rotation speed according to the characteristics of the material.

[0023] Reference Figure 1-7 The locking mechanism 10 includes a first locking base 101, the front end of the door panel 9 is fixedly connected to the first locking base 101, the front end of the first locking base 101 is rotatably connected to the locking handle 102, the locking handle 102 is provided with a plug-in part 103, the front end of the body 1 is fixedly connected to the second locking base 104, the front end of the second locking base 104 is fixedly connected to the latch 105, and the plug-in part 103 is plugged into the inner side of the latch 105. With the above structural setup, the operator holds handle 15 and pushes door panel 9 towards body 1, ensuring a tight fit between door panel 9 and door frame of body 1. The operator then holds locking handle 102. At this point, the first locking base 101 fixed to door panel 9 and the second locking base 104 fixed to body 1 should be substantially aligned. The insertion part 103 on locking handle 102 is inserted into or snapped into the inside of the latch 105 on the second locking base 104. The locking handle 102 is then rotated downwards or pressed inwards. This rotation is typically achieved using an eccentric cam or lever principle. As locking handle 102 rotates, insertion part 103 exerts a strong inward pulling force on latch 105, thus pulling door panel 9 tightly towards body 1 and fully compressing the sealing ring on door panel 9 (located inside door panel 9, not shown in the figure). When locking handle 102 can no longer rotate and is in a horizontal or locked position, the locking is complete. At this point, an airtight seal has been formed between the door panel 9 and the machine body 1, creating conditions for subsequent vacuuming. After drying, the return valve 13 must be slowly opened to allow air to enter the machine body 1 through the return pipe 12 until the pressure gauge shows complete balance between internal and external pressures. It is strictly forbidden to forcibly unlock the door under internal vacuum conditions; otherwise, the enormous atmospheric pressure will press down on the door panel 9, preventing it from opening and potentially damaging the locking mechanism 10 or causing a safety accident. Hold the locking handle 102. Rotate the locking handle 102 upwards from the locked position to the released position. This reverse rotation releases the pulling force of the insertion part 103 on the latch 105, and the locking force disappears. Completely disengage or release the insertion part 103 from the inside of the latch 105. At this point, the door panel 9 is unlocked. Hold the handle 15 to pull open the door panel 9 and remove the dried material.

[0024] Reference Figure 1-7 The vacuum mechanism 11 includes a hose 111. The hose 111 is fixedly connected to the inside of the door panel 9. The other end of the hose 111 passes through and extends to the inside of the body 1. An air pump 112 is fixedly connected to the inside of the body 1. With the above structural setup, before activating the vacuum mechanism 11, it must be ensured that the door panel 9 is tightly closed and locked by the locking mechanism 10, forming a closed, airtight drying chamber for the entire machine body 1. This is a crucial prerequisite for successful vacuuming. The operator starts the air pump 112 via the control panel. The air pump 112 begins high-speed operation, and its internal rotor, blades, and other structures generate a suction effect, forcibly expelling gas from its inlet. The suction effect of the air pump 112 first generates negative pressure (vacuum) in the pipeline directly connected to it. This negative pressure is transmitted to the entire drying chamber of the machine body 1 through the hose 111. The specific path is: air in the chamber of machine body 1 → the port of hose 111 inside machine body 1 → the inside of hose 111 → the inlet of air pump 112 → expelled by air pump 112 to the outside atmosphere (the bottom of machine body 1 is hollow, so it can be connected to the outside atmosphere). As the air pump 112 continues to operate, the air inside the machine body 1 is continuously extracted, the air pressure gradually decreases, and the vacuum level gradually increases. The equipment is typically equipped with a vacuum gauge (mounted on the door panel 9 or control panel, not shown in the figure) to display the real-time vacuum level (usually expressed in Pa or MPa). The operator can set a target vacuum level. When the vacuum gauge shows that the preset value has been reached, the control system may automatically adjust the power of the air pump 112 to maintain the required vacuum environment for drying. Throughout the drying process, the air pump 112 may operate intermittently to remove water vapor continuously evaporating from the material, compensating for minor leaks, thereby maintaining the set vacuum level. After the drying process is completed, the operator first stops the air pump 112, and then breaks the vacuum through the return valve 13 to restore the pressure to normal. It should be noted that the control logic required by the control system can be implemented using existing technology, and therefore will not be elaborated further.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vacuum dryer, characterized in that, The machine includes a body (1), the bottom of which is hollow. A partition (2) is fixedly connected to the inner side of the body (1), and an outer cylinder (3) is fixedly connected to the top of the partition (2). An inner cylinder (4) is rotatably connected to the inner side of the outer cylinder (3). Several water leakage holes (5) are provided on the inner cylinder (4). A water outlet pipe (6) is connected to the bottom of the outer cylinder (3). A water storage mechanism (7) is connected to the bottom of the partition (2). The water storage mechanism (7) is connected to the water outlet pipe (6). A drive mechanism (8) for driving the inner cylinder (4) to rotate is provided at the top of the outer cylinder (3). (1) has a door panel (9) hinged to the front end, and a handle (15) is fixedly connected to the front end of the door panel (9). A locking mechanism (10) is provided between the body (1) and the door panel (9). A vacuuming mechanism (11) for vacuuming the inside of the body (1) is provided on the inner side of the body (1). The vacuuming mechanism (11) passes through the door panel (9) and is connected to the inside of the body (1). A return pipe (12) is provided at the front end of the door panel (9). A return valve (13) is provided on the outer side of the return pipe (12). Four universal wheels (14) with limit mechanisms are provided at the bottom end of the body (1).

2. The vacuum dryer according to claim 1, characterized in that: The water storage mechanism (7) includes a water storage hopper (71), the bottom end of the partition (2) is connected to the water storage hopper (71), the bottom end of the water storage hopper (71) is connected to a drain pipe (72), and a drain valve (73) is provided on the outside of the drain pipe (72).

3. A vacuum dryer according to claim 1, characterized in that: The drive mechanism (8) includes a motor (81). The top end of the outer cylinder (3) is fixedly connected to the motor (81), and the rear end of the inner cylinder (4) is fixedly connected to a rotating shaft (82). The rotating shaft (82) is rotatably connected to the inner side of the outer cylinder (3). The rotating shaft (82) and the output end of the motor (81) are connected through a transmission mechanism (83).

4. A vacuum dryer according to claim 1, characterized in that: The locking mechanism (10) includes a first locking base (101), the front end of the door panel (9) is fixedly connected to the first locking base (101), the front end of the first locking base (101) is rotatably connected to the locking handle (102), the locking handle (102) is provided with a plug-in part (103), the front end of the body (1) is fixedly connected to a second locking base (104), the front end of the second locking base (104) is fixedly connected to a latch (105), and the plug-in part (103) is inserted into the inside of the latch (105).

5. A vacuum dryer according to claim 1, characterized in that: The vacuuming mechanism (11) includes a hose (111), the inner side of the door panel (9) is fixedly connected to the hose (111), the other end of the hose (111) passes through and extends to the inner side of the body (1), and the inner side of the body (1) is fixedly connected to an air pump (112).

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