Dehumidification device for low-temperature vacuum drying equipment
By designing a highly adaptable dehumidification device, the problem of difficulty in connecting dehumidification devices in series in low-temperature vacuum drying equipment was solved, achieving low pressure loss and efficient dehumidification, protecting the vacuum pump, and ensuring stable equipment operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGGUAN JIEXIN TESTER EQUIP CO LTD
- Filing Date
- 2025-06-16
- Publication Date
- 2026-05-12
AI Technical Summary
Existing dehumidification devices are difficult to connect directly in series in the pipeline of low-temperature vacuum drying equipment, resulting in large pressure loss and affecting the stable operation of the equipment.
A dehumidification device was designed, comprising a housing, a compressor, a condenser, and a shell-and-tube heat exchanger. Two identical shell-and-tube heat exchangers are arranged at an angle, equipped with solenoid valves to control exhaust and drainage. The condensate pipe is located at the lower end. The condenser is a plate heat exchanger, the fan is an axial flow fan, and the compressor is located between the condenser fan and the air outlet.
It achieves strong adaptability, low pressure loss, high dehumidification efficiency, protects the vacuum pump, extends equipment life, and ensures a stable and reliable drying process.
Smart Images
Figure CN224230499U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of drying technology, and in particular to a dehumidification device for low-temperature vacuum drying equipment. Background Technology
[0002] Some materials requiring drying have specific and stringent requirements for drying conditions. For example, materials like soil used in laboratories cannot be dried under high temperature and high airflow conditions. Instead, they are dried using low-temperature vacuum drying equipment under low temperature (e.g., below 40°C) and vacuum conditions. However, when a vacuum pump is used, the airflow contains moisture, which must be dehumidified to prevent moisture from entering and damaging the vacuum pump. Existing industrial dehumidifiers are typically placed directly in the workshop for dehumidification and are not designed for connection in series in a pipeline, making direct connection to the aforementioned low-temperature vacuum drying equipment difficult. In view of the aforementioned technical problems, this invention proposes a dehumidifier specifically designed for low-temperature vacuum drying equipment. This device can be connected in series in the pipeline of the low-temperature vacuum drying equipment and generates minimal pressure loss. Utility Model Content
[0003] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a dehumidification device for low-temperature vacuum drying equipment, which aims to solve the technical problem that the dehumidification device is difficult to be directly connected in series in the pipeline of the low-temperature vacuum drying equipment.
[0004] To achieve the above objectives, the present invention adopts the following technical solution:
[0005] A dehumidification device for a low-temperature vacuum drying equipment includes a housing, which houses a compressor, a condenser, and at least one evaporator. The condenser is equipped with a condenser fan. Each evaporator is a shell-and-tube heat exchanger, with an inlet pipe and an outlet pipe on the shell side of each heat exchanger. A condensate pipe is connected to the shell side of each heat exchanger, and each condensate pipe is connected to a condensate cup. Each condensate cup has an exhaust pipe and a drain pipe.
[0006] Furthermore, the dehumidification device for the low-temperature vacuum drying equipment is equipped with two shell-and-tube heat exchangers, and the two shell-and-tube heat exchangers are of the same specifications.
[0007] Furthermore, in the dehumidification device for the low-temperature vacuum drying equipment, each shell-and-tube heat exchanger is inclined, with the outlet end of the shell side lower than the inlet end of the shell side; the condensate pipe is located at the lower end of the shell-and-tube heat exchanger.
[0008] Furthermore, in the dehumidification device for the low-temperature vacuum drying equipment, each exhaust pipe is equipped with a first solenoid valve, and each drain pipe is equipped with a second solenoid valve.
[0009] Furthermore, in the dehumidification device for the low-temperature vacuum drying equipment, an air inlet is provided on the housing corresponding to the condenser, and an air outlet is provided on the housing opposite to the air inlet.
[0010] Furthermore, in the dehumidification device for the low-temperature vacuum drying equipment, the condenser is a plate heat exchanger and the condenser fan is an axial flow fan.
[0011] Furthermore, in the dehumidification device for the low-temperature vacuum drying equipment, the compressor is located between the condenser fan and the air outlet.
[0012] Beneficial effects: This utility model provides a dehumidification device for low-temperature vacuum drying equipment, which has at least the following advantages compared with the prior art:
[0013] (1) Strong adaptability and low pressure loss: The dehumidification device has a unique structural design and can be easily connected in series in the pipeline of the low temperature vacuum drying equipment. The pressure loss is very small, which ensures the stable and efficient operation of the vacuum drying equipment, avoids pressure changes from interfering with the drying process, and ensures the drying quality of the material to be dried.
[0014] (2) High-efficiency dehumidification protection equipment: By further setting two identical shell-and-tube heat exchangers, the contact and heat exchange area with humid gas is greatly increased, allowing more water vapor to liquefy rapidly and significantly improving dehumidification efficiency. This effectively prevents moisture from entering the vacuum pump, avoids damage to the vacuum pump due to water ingress, extends its service life, reduces equipment maintenance costs, and ensures the continuous and stable operation of the vacuum drying equipment.
[0015] (3) Optimized drainage ensures stability: The shell-and-tube heat exchanger is set at an angle, with the condensate pipe located at the lower end, and the condensate is automatically discharged by gravity. This avoids water hammer damage to the equipment caused by water accumulation, reduces the contact between condensate and metal, reduces the risk of corrosion, and extends the service life of the equipment; at the same time, it prevents water accumulation from being carried away by the airflow, maintains the vacuum performance of the system, and ensures that the drying process is stable and reliable.
[0016] (4) Precise control improves reliability: Solenoid valves are installed on the exhaust pipe and drain pipe respectively to precisely regulate the discharge of gas and water. Non-condensable gases and condensate are discharged in time to maintain good heat exchange and dehumidification efficiency, and can also prevent the backflow of outside air and moisture, ensuring stable system operation and reducing the probability of failure. Attached Figure Description
[0017] Figure 1 This is a schematic diagram illustrating the working principle of a dehumidification device used in low-temperature vacuum drying equipment.
[0018] Figure 2 Three-dimensional dehumidification device for low-temperature vacuum drying equipment Figure 1 .
[0019] Figure 3 Three-dimensional dehumidification device for low-temperature vacuum drying equipment Figure 2 .
[0020] Figure 4 This is a schematic diagram illustrating the application of a dehumidification device in a low-temperature vacuum drying equipment.
[0021] Explanation of reference numerals in the attached figures:
[0022] 1. Compressor;
[0023] 2. Condenser; 21. Condenser fan;
[0024] 3. Evaporator (coaxial heat exchanger); 31. Shell-side inlet pipe; 32. Shell-side outlet pipe; 33. Condensate pipe;
[0025] 4. Condensate cup; 41. Exhaust pipe; 42. Drain pipe;
[0026] 51. First solenoid valve; 52. Second solenoid valve;
[0027] 8. Housing; 801. Air inlet; 802. Air outlet;
[0028] 9. Low-temperature vacuum drying equipment; 91. Vacuum pump for low-temperature vacuum drying equipment; 92. Drying unit for low-temperature vacuum drying equipment;
[0029] Figure 4 A in the text refers to a dehumidification device used in low-temperature vacuum drying equipment. Detailed Implementation
[0030] 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.
[0031] Please see Figures 1 to 4 This utility model provides a dehumidification device for a low-temperature vacuum drying equipment. The accompanying drawings are for illustrative purposes only and are not proportional to actual products. The drawings only depict structures relevant to the present utility model; some conventional structures are not specifically shown. 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.
[0032] To facilitate observation of the internal structure, Figure 2 The front panel of the box is not shown. Figure 3The front panel, top panel, and two end panels of the box are not shown.
[0033] Figure 1 Solid arrows indicate the direction of air flow; dashed arrows indicate the direction of refrigerant flow.
[0034] The dehumidification device for the low-temperature vacuum drying equipment includes a housing 8, which houses a compressor 1, a condenser 2, and at least one evaporator 3. The condenser is equipped with a condenser fan 21. Each evaporator is a shell-and-tube heat exchanger. Each shell-and-tube heat exchanger 3 has an inlet pipe 31 and an outlet pipe 32 on its shell side. Each shell-and-tube heat exchanger is connected to a condensate pipe 33 on its shell side. Each condensate pipe is connected to a condensate cup 4. Each condensate cup has an exhaust pipe 41 and a drain pipe 42.
[0035] In practical applications, a throttling element (e.g., an expansion valve) is usually installed upstream of the evaporator. Since the compressor, condenser, throttling element, and evaporator are connected in a closed loop in sequence, which is a standard configuration for refrigeration systems, this application will not elaborate on their connection relationship.
[0036] Furthermore, the dehumidification device for the low-temperature vacuum drying equipment is equipped with two shell-and-tube heat exchangers of the same specifications. That is, two shell-and-tube heat exchangers are connected in parallel downstream of the condenser. The significance of this arrangement includes: (1) improving dehumidification performance: the two heat exchangers increase the contact and heat exchange area with the humid gas, allowing more water vapor to liquefy, improving dehumidification efficiency, and better protecting the vacuum pump. (2) ensuring stable operation: when one heat exchanger fails, the other can still maintain some functions, avoiding device failure, and the same specifications ensure stable dehumidification process without fluctuations in effect.
[0037] Furthermore, each shell-and-tube heat exchanger is inclined. Figure 1 (View from left to right, with the outlet end of the shell side lower than the inlet end of the shell side. Each condensate pipe is located below the corresponding outlet pipe. As can be seen from the attached diagram, due to the inclined setting of the tube-and-shell heat exchanger, the condensate pipe and the outlet pipe are located at the lower end of the tube-and-shell heat exchanger. The main significance of this setting is to optimize the condensate discharge efficiency and ensure the stable operation of the system: (1) Facilitates drainage: Gravity allows the condensate to flow automatically to the outlet, avoiding water accumulation, and also thinning the liquid film on the heat exchange surface, enhancing the dehumidification effect. (2) Protects equipment: Prevents water hammer damage to the equipment caused by water accumulation, reduces the contact between condensate and metal, reduces the risk of corrosion, and extends the service life of the equipment. (3) Stabilizes vacuum: Prevents water accumulation from being carried away by the airflow and maintains the vacuum performance of the system.
[0038] Furthermore, each exhaust pipe 41 is equipped with a first solenoid valve 51, and each drain pipe 42 is equipped with a second solenoid valve 52. The significance of this arrangement is: (1) It can precisely control the discharge of gas and water. The first solenoid valve controls the exhaust of the exhaust pipe, which can discharge non-condensable gas and maintain good heat exchange and dehumidification efficiency of the system; the second solenoid valve controls the drainage, which can discharge condensate in time and prevent water accumulation from affecting the operation of the device. (2) It has an anti-backflow function. The first solenoid valve prevents the backflow of outside air and maintains the vacuum of the system; the second solenoid valve prevents water from flowing back and ensures that water is discharged smoothly.
[0039] Furthermore, an air inlet 801 is provided on the casing corresponding to the condenser, and an air outlet 802 is provided on the casing opposite to the air inlet. This arrangement can enhance heat exchange, allow the gas to fully contact the evaporator, and improve heat exchange efficiency.
[0040] Preferably, the condenser is a plate heat exchanger, and the condenser fan is an axial flow fan. Plate heat exchangers have a large heat exchange area, enabling efficient heat exchange, rapid liquefaction of water vapor to improve dehumidification efficiency, and a compact structure that saves equipment space and facilitates internal layout. Axial flow fans can generate a large axial flow rate, allowing humid gas to pass quickly and evenly through the condenser, enhancing heat exchange, and achieving high-flow ventilation with low energy consumption, thus reducing operating costs.
[0041] Furthermore, the compressor 1 is located between the condenser fan 21 and the air outlet 802. This layout optimizes the airflow path, allowing the airflow blown out by the condenser fan to subsequently cool the compressor, providing forced heat dissipation to the compressor, maintaining its appropriate operating temperature, reducing malfunctions, and ensuring stable equipment operation.
[0042] To facilitate understanding, the working principle is further briefly described below.
[0043] In practical applications, the dehumidification device described above for low-temperature vacuum drying equipment can be conveniently connected in series in the pipeline of the dehumidification device 9 of the vacuum drying equipment. When the vacuum pump 91 of the dehumidification device of the vacuum drying equipment is running, it can evacuate the drying unit 92, and the air drawn out from the drying unit is humid air. The humid air is cooled when it passes through the shell side of the shell-and-tube heat exchanger, and the moisture in the air is condensed, thus achieving dehumidification. The air discharged from the shell-and-tube heat exchanger becomes dry air, and the dry air will not damage the vacuum pump after reaching the vacuum pump. At the same time, when the condenser fan is running, it can draw in indoor air from the air inlet on the casing and pass through the condenser, thereby cooling the condenser. The air drawn in from the air inlet will further pass through the compressor to cool the compressor, and then be discharged from the air outlet.
[0044] It should be noted that, in practical applications, the dehumidification device of the low-temperature vacuum drying equipment can be connected in series in the pipeline of the dehumidification device 9 of the vacuum drying equipment, but the dehumidification device 9 of the vacuum drying equipment itself is not within the scope of protection of this application.
[0045] 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 dehumidification device for a low-temperature vacuum drying equipment, comprising a housing, wherein a compressor, a condenser, and at least one evaporator are disposed within the housing; the condenser is correspondingly provided with a condenser fan, characterized in that: Each evaporator is a shell-and-tube heat exchanger, and each shell-and-tube heat exchanger is equipped with an inlet pipe and an outlet pipe on the shell side; each shell-and-tube heat exchanger is connected to a condensate pipe, each condensate pipe is connected to a condensate cup, and each condensate cup is equipped with an exhaust pipe and a drain pipe.
2. The dehumidification device for a low-temperature vacuum drying equipment according to claim 1, characterized in that: There are two shell-and-tube heat exchangers, and the two shell-and-tube heat exchangers are of the same specifications.
3. The dehumidification device for a low-temperature vacuum drying equipment according to claim 1 or 2, characterized in that: Each shell-and-tube heat exchanger is installed at an angle, with the outlet end of the shell side lower than the inlet end of the shell side; the condensate tubes are located at the lower end of the shell-and-tube heat exchanger.
4. The dehumidification device for a low-temperature vacuum drying equipment according to claim 1 or 2, characterized in that: Each exhaust pipe is equipped with a first solenoid valve, and each drain pipe is equipped with a second solenoid valve.
5. The dehumidification device for a low-temperature vacuum drying equipment according to claim 1 or 2, characterized in that: An air inlet is provided on the casing corresponding to the condenser, and an air outlet is provided on the casing opposite to the air inlet.
6. The dehumidification device for a low-temperature vacuum drying equipment according to claim 5, characterized in that: The condenser is a plate heat exchanger, and the condenser fan is an axial flow fan.
7. The dehumidification device for a low-temperature vacuum drying equipment according to claim 5, characterized in that: The compressor is located between the condenser fan and the air outlet.