Low-temperature vacuum drying equipment
Low-temperature vacuum drying equipment solves the problems of long drying time and material damage by combining heating plates and vacuuming at low temperatures, achieving efficient and safe drying results and is suitable for a variety of materials.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGGUAN JIEXIN TESTER EQUIP CO LTD
- Filing Date
- 2025-04-28
- Publication Date
- 2026-05-22
AI Technical Summary
Existing drying equipment has an excessively long drying time, which cannot meet the drying requirements of materials with high drying conditions, especially under high temperature and high airflow conditions, which can easily change the internal composition and physical properties of the materials.
The equipment employs a low-temperature vacuum drying system, which combines heating with vacuuming in a low-temperature environment (below 40°C). It is equipped with components such as a dehumidifier, air filter, pressure relief solenoid valve, and vacuum quick valve to ensure the stability and accuracy of the drying process.
It significantly shortens drying time to about 2 hours, improves drying efficiency, expands the scope of application, ensures that material properties are not damaged, reduces production costs, and improves equipment stability and safety.
Smart Images
Figure CN224266650U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of drying equipment technology, and in particular to a low-temperature vacuum drying device. Background Technology
[0002] Drying technology is widely used in modern industrial production and scientific research, and the performance of drying equipment has a crucial impact on production efficiency and product quality. Currently, existing drying equipment generally uses circulating hot air to dry the object. This traditional drying method mainly utilizes the hot air flow to carry heat to the object being dried, causing the internal moisture of the object to evaporate, thereby achieving the purpose of drying.
[0003] However, this method of drying with hot air has many obvious drawbacks:
[0004] (1) Long drying time: Under normal circumstances, the drying time for workpieces using traditional hot air drying methods is often as long as 20 to 30 hours. In some industrial production scenarios with extremely high requirements for production efficiency, such a long drying time will greatly prolong the production cycle, increase production costs, and seriously restrict the improvement of production efficiency. For example, in the food processing industry, excessively long drying time will affect the production progress of food, resulting in products not being able to be supplied to the market in a timely manner, thereby affecting the economic benefits of enterprises.
[0005] (2) Limited Scope of Application: Some materials requiring drying have specific and stringent requirements for drying conditions. For example, soil and other materials used in laboratories may undergo changes in their internal composition, structure, and physical properties when dried under high temperature and high airflow conditions, thus affecting the accuracy of subsequent experimental results. Specifically, high temperature may decompose certain organic components in the soil, and high airflow may damage the structure of soil particles, causing the soil sample to lose its original characteristics. This means that traditional hot air drying methods cannot meet the drying needs of these materials with high requirements for drying conditions.
[0006] Given the aforementioned problems with existing drying technologies, an innovative drying technology solution is urgently needed to address these challenges. The low-temperature vacuum drying equipment proposed in this application innovatively combines vacuuming at a low temperature (e.g., below 40°C) with heating from a heating plate to heat the object. This technology not only significantly reduces drying time to approximately 2 hours, greatly improving drying efficiency, but also avoids generating strong airflow during the drying process, effectively preventing adverse effects on the object being dried. It can well meet the drying needs of materials with high requirements for drying conditions, bringing a new breakthrough and development direction to the field of drying technology. Utility Model Content
[0007] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a low-temperature vacuum drying device, which aims to solve the technical problems of excessive drying time and inability to meet the drying requirements of materials with high drying conditions (such as materials that cannot be dried in high temperature and high airflow environments).
[0008] To achieve the above objectives, the present invention adopts the following technical solution:
[0009] A low-temperature vacuum drying device includes a housing and a vacuum pump. The housing contains several drying units, each of which includes a shell and a door panel. Each shell contains several heating plates, each heating plate containing a heating element. Each shell contains a temperature sensor and a pressure sensor. Each shell is connected to a vacuum tube, and each vacuum tube is connected to the vacuum pump.
[0010] Furthermore, the low-temperature vacuum drying equipment also includes a dehumidification device; each vacuum tube is connected to the inlet end of the dehumidification device, and the inlet pipe of the vacuum pump is connected to the outlet end of the dehumidification device.
[0011] Furthermore, the low-temperature vacuum drying equipment is equipped with at least one manifold, each manifold is connected to multiple vacuum tubes, and each manifold is connected to the inlet end of the dehumidification device.
[0012] Furthermore, in the aforementioned low-temperature vacuum drying equipment, each manifold is equipped with an air filter.
[0013] Furthermore, in the aforementioned low-temperature vacuum drying equipment, each vacuum tube is equipped with a pressure relief solenoid valve and a vacuum quick-release valve.
[0014] Furthermore, in the aforementioned low-temperature vacuum drying equipment, each shell includes a top plate, a bottom plate, a back plate, and two side plates.
[0015] Furthermore, in the aforementioned low-temperature vacuum drying equipment, each heating element is a heating rod, and each heating rod passes through the corresponding back plate and is inserted into the corresponding heating plate.
[0016] Furthermore, in the aforementioned low-temperature vacuum drying equipment, each heating plate in each drying unit is respectively equipped with a temperature sensor, and the probe of each temperature sensor passes through the corresponding back plate and is inserted into the corresponding heating plate.
[0017] Furthermore, in the aforementioned low-temperature vacuum drying equipment, the chamber includes a first chamber and a second chamber, with each drying unit disposed in the first chamber and the vacuum pump disposed in the second chamber.
[0018] Beneficial effects: This utility model provides a low-temperature vacuum drying device, which has significant advantages over traditional drying equipment, greatly improving drying efficiency and quality, and expanding the application scope of drying technology. These advantages are mainly reflected in the following aspects:
[0019] (1) Significantly improved drying efficiency. Traditional hot air drying methods typically require 20-30 hours to dry workpieces, while this equipment, combining low-temperature (below 40℃) vacuuming and heating plate technology, can significantly shorten the drying time to about 2 hours. This greatly reduces the production cycle, and in industries with high production efficiency requirements such as food processing and electronics manufacturing, it can significantly reduce production costs, improve corporate economic benefits, and enhance market competitiveness.
[0020] (2) Wide range of applications. Some materials have stringent requirements for drying conditions, and traditional hot air drying methods can easily alter their internal composition, structure, and physical properties. This equipment dries materials in a low-temperature vacuum environment without strong airflow interference, which can well meet the drying needs of such materials, such as laboratory soil samples and heat-sensitive drugs, ensuring that the material properties are not damaged and providing strong support for scientific research experiments and the production of special products.
[0021] (3) Ensure stable operation and service life of the equipment. The dehumidification device equipped with the equipment can remove moisture from the gas in the vacuum tube, prevent moisture accumulation from affecting the pumping efficiency of the vacuum pump, and ensure stable operation of the vacuum pump; the air filter installed on the manifold can intercept dust and impurities, prevent them from entering the dehumidification device and vacuum pump, reduce equipment wear, extend the overall service life, and reduce equipment maintenance costs.
[0022] (4) Safe, convenient, and highly accurate operation. The pressure relief solenoid valve on the vacuum tube can automatically release pressure in case of abnormality, balance the pressure before opening the door to remove materials, and ensure the safety of equipment and personnel; the vacuum quick valve can quickly draw a vacuum when started, accurately adjust the vacuum level, adapt to different drying processes, and quickly cut off in case of emergency to prevent the accident from escalating. In addition, each heating plate is equipped with a temperature sensor, which can accurately measure the temperature in real time and independently control the heating rod to ensure that the heating plate temperature is suitable, improve the drying quality, and avoid the material from deteriorating or drying unevenly due to temperature problems. Attached Figure Description
[0023] Figure 1 Three-dimensional low-temperature vacuum drying equipment Figure 1 The perspective in the picture is from the front.
[0024] Figure 2 Three-dimensional low-temperature vacuum drying equipment Figure 2 The perspective in the picture is from the front.
[0025] Figure 3 Three-dimensional low-temperature vacuum drying equipment Figure 3The viewpoint in the picture is from the rear.
[0026] Figure 4 Three-dimensional drying unit Figure 1 The perspective in the picture is from the front.
[0027] Figure 5 Three-dimensional drying unit Figure 2 The viewpoint in the picture is from the rear.
[0028] Figure 6 Three-dimensional drying unit Figure 3 The viewpoint in the picture is from the rear.
[0029] Figure 7 This is a schematic diagram illustrating the working principle of a low-temperature vacuum drying device.
[0030] Figure label description
[0031] 1. Box; 11. First box; 12. Second box;
[0032] 2. Drying unit; 21. Housing; 211. Top plate of housing; 212. Bottom plate of housing; 213. Back plate of housing; 214. Side plate of housing; 22. Door plate of housing; 23. Heating plate; 24. Heating element (heating rod); 25. Temperature sensor; 26. Pressure sensor;
[0033] 41. Vacuum tube; 42. Manifold;
[0034] 51. Pressure relief solenoid valve; 52. Vacuum quick-release valve; 53. Air filter;
[0035] 7. Dehumidifier;
[0036] 8. Vacuum pump; 81. Vacuum pump inlet pipe. Detailed Implementation
[0037] To make the objectives, technical solutions, and effects of this utility model clearer and more explicit, the present utility model is further described in detail below. It should be understood that the specific embodiments described herein are merely for explaining this utility model and are not intended to limit this utility model.
[0038] Please see Figures 1 to 7 This utility model provides a low-temperature vacuum drying device. The accompanying drawings are for illustrative purposes only and are not proportional to actual products. The drawings only show structures relevant to the present utility model; some conventional structures are not specifically depicted.
[0039] To facilitate observation of the internal structure, Figure 2 The front panel of the second chamber and the doors of each drying unit are not shown in the drawing. Figure 3The back panels of the first and second boxes are not shown in the drawing. Figure 6 The backplate of the drying unit and the pressure sensor are not shown. Furthermore, Figure 7 Only one drying unit is shown schematically, along with two heating rods, a temperature sensor, and a pressure sensor. Figure 7 The middle arrow indicates the direction of airflow.
[0040] The terms "first," "second," etc., used herein are merely different names for similar structures for ease of explanation and are not intended to limit this application. "Several" in this document refers to a quantity of 1 or more, and "multiple" refers to a quantity of 2 or more. Since the quantity of the structures referred to is not a key point of the invention, no specific limitation is made.
[0041] The low-temperature vacuum drying equipment includes a housing 1 and a vacuum pump 8. The housing contains several drying units 2. Each drying unit includes a shell 21 and a door panel 22. Each shell contains several heating plates 23, and each heating plate contains a heating element 24. Each shell contains a temperature sensor 25 and a pressure sensor 26. Each shell is connected to a vacuum tube 41, and each vacuum tube is connected to the vacuum pump 8.
[0042] Each door panel is rotatably mounted on the chamber. After opening the door panel, the object to be dried can be placed on the heating plate of each drying unit, and then the door panels are closed. The heating rods are activated, causing the heating plates to heat up. At the same time, the vacuum pump runs, evacuating each drying unit. By combining heating with vacuuming, the object to be dried is rapidly dried in a low-temperature (e.g., below 40°C, but not limited to this) vacuum environment.
[0043] Furthermore, the low-temperature vacuum drying equipment also includes a dehumidification device 7 (such as...). Figure 3 (As shown in the diagram). Each vacuum tube is connected to the inlet of the dehumidification device, and the inlet pipe of the vacuum pump is connected to the outlet of the dehumidification device. During the vacuum drying process, the gas extracted from the drying unit contains moisture. If it directly enters the vacuum pump, it will accumulate inside the pump, affecting its pumping efficiency. However, by installing a dehumidification device, the moisture in the gas in the vacuum tubes can be removed beforehand, making the gas entering the vacuum pump drier. The vacuum pump can then maintain the vacuum environment within the drying unit more efficiently, thereby accelerating the evaporation rate of moisture in the processed object and significantly improving the overall drying efficiency.
[0044] Since this application does not aim to propose a new dehumidification device, the specific structure of the dehumidification device will not be described or limited herein.
[0045] Please see Figure 3The low-temperature vacuum drying equipment is equipped with at least one manifold 42 (two manifolds 42 are shown in the figure), and each manifold connects to multiple vacuum tubes (each manifold in the figure connects to three vacuum tubes, but this is not the case in actual applications). Each manifold is connected to the inlet of the dehumidification device. By setting up manifolds, not only can the internal vacuum pipeline layout of the equipment be made more compact and reasonable, but the manifolds also collect gas in a concentrated manner, making the gas flow into the dehumidification device stable and concentrated, giving full play to its performance and improving dehumidification efficiency.
[0046] Please continue reading. Figure 3 Furthermore, each manifold is equipped with an air filter 53. This design can intercept dust and impurities, preventing them from entering the dehumidification device and vacuum pump, thus preventing equipment wear and extending service life. In addition, it can also prevent impurities from clogging the dehumidification device, ensuring its efficient dehumidification, protecting the vacuum environment of the drying unit, and accelerating the drying speed.
[0047] Please see Figures 4 to 6 Furthermore, each vacuum tube is equipped with a pressure relief solenoid valve 51 and a vacuum quick-release valve 52. The pressure relief solenoid valve automatically releases pressure in case of abnormalities, ensuring equipment and personnel safety; it also balances pressure before opening the door to remove materials, facilitating operation. The vacuum quick-release valve allows for rapid vacuuming during startup, shortening the drying cycle; it also allows for precise vacuum adjustment to adapt to different processes; and it can quickly shut off in emergencies to prevent the accident from escalating.
[0048] Please continue reading. Figures 4 to 6 Furthermore, each housing 21 includes a top plate 211, a bottom plate 212, a back plate 213, and two side plates 214. The top plate, bottom plate, back plate, and side plates together form the frame structure of the housing, which, together with the door panel 22, can enclose a sealed space. This protects the drying process from external environmental factors (such as dust, moisture, external forces, etc.) and ensures that the drying process takes place in a relatively stable and clean environment.
[0049] Furthermore, each heating element 24 is a heating rod, and each heating rod passes through its corresponding back plate 213 and is inserted into its corresponding heating plate 23. Since the heating rods are directly inserted into the heating plate, heat transfer loss is minimal, and the heating plate can dissipate heat evenly, improving drying quality. The heat is concentrated on the heating plate, facilitating precise temperature control and adapting to different drying needs.
[0050] Furthermore, each heating plate in each drying unit is equipped with a corresponding temperature sensor 25, and the probe of each temperature sensor passes through the corresponding back plate and is inserted into the corresponding heating plate. The significance of this setting is: (1) The temperature sensor probe is directly inserted into the heating plate, which can measure the actual temperature of the heating plate in real time and accurately. This is because direct contact with the heating plate can minimize measurement errors and avoid interference from the external ambient temperature, thereby providing accurate temperature data for the control system and helping to achieve precise temperature control during the drying process. (2) By accurately monitoring the temperature of the heating plate, the start and stop of each heating rod can be controlled independently, thereby ensuring that the heating plate is kept within a suitable temperature range during the drying process. Different materials have strict requirements for drying temperature. Too high or too low a temperature will affect the drying quality, such as causing material deterioration or uneven drying.
[0051] Furthermore, the housing 1 includes a first housing 11 and a second housing 12, with each drying unit housed in the first housing and the vacuum pump housed in the second housing. This arrangement avoids mutual interference between the vacuum pump and the drying units. The drying units may generate heat and vibration during operation, while the vacuum pump generates noise and vibration. Separating them reduces mutual interference and ensures stable operation of each unit.
[0052] For ease of understanding, the working principle of the low-temperature vacuum drying equipment is briefly described below.
[0053] When the low-temperature vacuum drying equipment is in operation, first open the door of the drying unit, place the object to be dried on the heating plate, and then close the door. At this time, the heating element starts working, causing the heating plate to heat up. Simultaneously, the vacuum pump starts, and a vacuum operation is performed on the drying unit through the vacuum tube, creating a low-temperature (less than 40℃) vacuum drying environment to achieve rapid drying of the material.
[0054] During the drying process, the dehumidification device plays a crucial role. The gas containing moisture extracted from the drying unit first passes through the dehumidification device to remove the moisture before entering the vacuum pump. This prevents moisture from accumulating inside the vacuum pump, ensuring that the vacuum pump efficiently maintains the vacuum environment within the drying unit and accelerates the evaporation of moisture from the material.
[0055] Each drying unit's heating plate is equipped with a temperature sensor. The sensor's probe is inserted into the heating plate to accurately measure its temperature in real time, providing precise data to the control system for accurate temperature control. Simultaneously, the heating rods are independently controlled to start and stop based on the measured temperature, ensuring the heating plates operate within a suitable temperature range to meet the drying requirements of different materials.
[0056] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. It is understood that those skilled in the art can make equivalent substitutions or modifications based on the technical solution and inventive concept of the present utility model, and all such modifications or substitutions should fall within the protection scope of the present utility model.
Claims
1. A low-temperature vacuum drying device, comprising a chamber and a vacuum pump, characterized in that: The chamber contains several drying units, each including a shell and a door panel. Each shell contains several heating plates, each containing a heating element. Each shell also contains a temperature sensor and a pressure sensor. Each shell is connected to a vacuum tube, and each vacuum tube is connected to a vacuum pump. The low-temperature vacuum drying equipment also includes a dehumidification device. Each vacuum tube is connected to the inlet of the dehumidification device, and the inlet pipe of the vacuum pump is connected to the outlet of the dehumidification device.
2. The low-temperature vacuum drying equipment according to claim 1, characterized in that: The low-temperature vacuum drying equipment is equipped with at least one manifold, each manifold is connected to multiple vacuum tubes, and each manifold is connected to the inlet end of the dehumidification device.
3. The low-temperature vacuum drying equipment according to claim 2, characterized in that: Each manifold is equipped with an air filter.
4. The low-temperature vacuum drying equipment according to claim 1, characterized in that: Each vacuum tube is equipped with a pressure relief solenoid valve and a vacuum quick-release valve.
5. The low-temperature vacuum drying equipment according to claim 1, characterized in that: Each shell includes a top plate, a bottom plate, a back plate, and two side plates.
6. The low-temperature vacuum drying equipment according to claim 5, characterized in that: Each heating element is a heating rod, and each heating rod passes through the corresponding back plate and is inserted into the corresponding heating plate.
7. The low-temperature vacuum drying equipment according to claim 5, characterized in that: Each heating plate in each drying unit is equipped with a corresponding temperature sensor, and the probe of each temperature sensor passes through the corresponding back plate and is inserted into the corresponding heating plate.
8. The low-temperature vacuum drying equipment according to claim 1, characterized in that: The enclosure includes a first enclosure and a second enclosure, with each drying unit disposed in the first enclosure and the vacuum pump disposed in the second enclosure.