A device for preventing product moisture absorption in a freeze dryer

Abstract

This utility model relates to the field of freeze dryer technology, and discloses a device for preventing product moisture absorption in a freeze dryer. It includes a tank body with a compressed air inlet pipe. The tank body contains a sterilization and dehumidification filter, and a drying and sterile air inlet pipe. A pressure reducing valve is installed at the rear end of the compressed air inlet pipe, and a pressure gauge is located at the rear end of the valve. This utility model directly introduces drying and sterilizing air by opening and closing the valve. The pressure gauge provides a direct view of the pressure inside the chamber. After opening the chamber door, a certain pressure difference can be maintained inside the chamber by opening and closing the valve, keeping the chamber dry. This is more autonomous and controllable than existing air inlet devices. By using compressed drying and sterilizing air to block contact with the air inside the clean area, it reduces work steps, increases safety, reduces the possibility of moisture absorption and contamination of the dried product after leaving the chamber, ensures product quality, improves product qualification rate, and reduces costs.

Description

Technical Field

[0001] This utility model relates to the field of freeze dryer technology, and in particular to a device for preventing products from absorbing moisture in a freeze dryer. Background Technology

[0002] After the freeze-drying process, traditional methods often disrupt the vacuum environment of the freeze dryer's front chamber by introducing air (around 60% humidity) into the clean area. This causes the dried product to come into contact with high-humidity air during removal from the chamber and transfer, making it highly susceptible to moisture absorption, excessive moisture content, and even dissolution, severely impacting product quality and yield. Current technologies lack effective dry air protection mechanisms and cannot maintain positive pressure inside the chamber after opening, allowing external humid air to intrude, increasing the risk of contamination and operational complexity. Utility Model Content

[0003] To overcome the technical defects of the existing technology, this utility model provides a device for preventing products from absorbing moisture in a freeze dryer.

[0004] The technical solution adopted by this utility model is: a device for preventing product moisture absorption in a freeze dryer, including a tank body for containing dry and sterilized air; a compressed air inlet pipe for connecting to an external compressed air source; a sterilization and dehumidification filter inside the tank body for dehumidifying and sterilizing the incoming compressed air; a dry and sterile air inlet pipe for delivering the treated dry and sterile air to the front chamber of the freeze dryer; a pressure reducing valve installed at the rear end of the compressed air inlet pipe for regulating the air pressure entering the tank; a pressure gauge located at the rear end of the pressure reducing valve on the compressed air inlet pipe for monitoring the pressure inside the tank; and a switch valve at the front end of the dry and sterile air inlet pipe for controlling the flow of dry air.

[0005] Preferably, the tank body is made of 304 stainless steel.

[0006] Preferably, a control regulating valve is installed on the compressed air inlet pipe.

[0007] Preferably, the pressure reducing valve, pressure gauge, and control regulating valve are all connected to the compressed air inlet pipe via a first quick-connect clamp, and the switching valve is connected to the dry and sterile air inlet pipe via a second quick-connect clamp.

[0008] Preferably, both the compressed air inlet pipe and the sterile air inlet pipe are made of stainless steel.

[0009] Preferably, the compressed air inlet pipe is directly connected to the external compressed air storage tank via a PU compressed air pipe.

[0010] Preferably, the tank body includes a sterilization and dehumidification tank and a threaded cover that is threadedly connected to the sterilization and dehumidification tank.

[0011] Preferably, a sealing gasket is provided at the connection between the threaded cap and the sterilization and dehumidification tank.

[0012] The beneficial effects of this utility model are as follows: During the pressurization and air intake operation of the freeze-drying chamber, the air intake device directly introduces dry and sterilized air by opening and closing the valve. Moreover, the pressure inside the chamber can be intuitively understood through the pressure gauge. After opening the chamber door, the pressure inside the chamber can be maintained by opening and closing the valve to keep the chamber dry. This is more autonomous and controllable than existing air intake devices. By using compressed dry and sterilized air to block contact with the air inside the clean area, the number of working steps is reduced, safety is improved, and the situation of dried products absorbing moisture and becoming contaminated after leaving the chamber is reduced, thus ensuring product quality, improving the product qualification rate, and reducing costs. Attached Figure Description

[0013] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a partially enlarged cross-sectional view of the tank body of this utility model.

[0016] Explanation of reference numerals in the attached drawings: 1. Tank body; 101. Sterilization and dehumidification tank; 102. Threaded cap; 103. Sealing gasket; 2. Compressed air inlet pipe; 3. Sterilization and dehumidification filter; 4. Dry and sterile air inlet pipe; 5. Pressure reducing valve; 6. Pressure gauge; 7. Switch valve; 8. Control and regulating valve; 9. First quick-connect clamp; 10. Second quick-connect clamp. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the various embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this utility model to facilitate a better understanding of this application. However, the technical solutions claimed in the claims of this application can be implemented even without these technical details and with various variations and modifications based on the following embodiments.

[0018] like Figure 1 and Figure 2As shown, this embodiment provides a device for preventing product moisture absorption in a freeze dryer, including a tank 1 for containing dry and sterilized air. The tank 1 is equipped with a compressed air inlet pipe 2 for connecting to an external compressed air source. An anti-septic and dehumidifying filter 3 is installed inside the tank 1 to dehumidify and sterilize the incoming compressed air. The tank 1 is also equipped with a dry and sterile air inlet pipe 4 for delivering the treated dry and sterile air to the front chamber of the freeze dryer. A pressure reducing valve 5 is installed at the rear end of the compressed air inlet pipe 2 to regulate the air pressure entering the tank 1. A pressure gauge 6 is installed on pipe 2 at the rear end of pressure reducing valve 5. Pressure gauge 6 is used to monitor the pressure inside tank 1. A switch valve 7 is installed at the front end of the dry sterile air inlet pipe 4. The switch valve 7 is used to control the flow of dry air. External compressed air enters tank 1 through compressed air inlet pipe 2, and becomes dry sterile air after being treated by sterilization and dehumidification filter 3. It is then delivered to the front chamber of the freeze dryer through dry sterile air inlet pipe 4. Pressure reducing valve 5 adjusts the inlet pressure, pressure gauge 6 monitors the internal pressure of tank 1 in real time, and switch valve 7 controls the flow of air to ensure that the chamber maintains positive pressure when the chamber is opened, preventing outside air from entering, preventing freeze-dried products from absorbing moisture and becoming contaminated, improving product qualification rate, and reducing quality risks and production costs.

[0019] The tank 1 is made of 304 stainless steel, which has good mechanical strength and corrosion resistance, making it suitable for high-cleanliness environments. This prevents the inside of the tank 1 from rusting or contaminating the treated air, extends the service life of the equipment, and ensures the hygiene and safety of the air treatment process.

[0020] A control valve 8 is installed on the compressed air inlet pipe 2. By controlling the opening of the control valve 8, the amount of air entering the tank 1 is controlled, and the pressure is precisely regulated in conjunction with the pressure reducing valve 5.

[0021] The pressure reducing valve 5, pressure gauge 6, and control regulating valve 8 are all connected to the compressed air inlet pipe 2 via the first quick-connect clamp 9, and the switch valve 7 is connected to the dry and sterile air inlet pipe 4 via the second quick-connect clamp 10. The pipe connection method of the first quick-connect clamp 9 and the second quick-connect clamp 10 ensures the sealing of the connection of each component, prevents leakage, facilitates installation and disassembly, and makes it easy to maintain and replace components, thereby improving the maintainability and sealing performance of the equipment.

[0022] Both the compressed air inlet pipe 2 and the sterile air inlet pipe 4 are made of stainless steel. The inner wall of the stainless steel pipe is smooth and does not easily accumulate dust, making it easy to clean and sterilize, thus ensuring the cleanliness of the transported air.

[0023] The compressed air inlet pipe 2 is directly connected to the external air compressor room storage tank via a PU air compressor pipe (not shown in the figure). The PU air compressor pipe has good pressure resistance and flexibility, and is suitable for connecting air source equipment at long distances. The flexible connection facilitates layout and installation, adapts to on-site space constraints, and reduces installation difficulty.

[0024] The tank 1 includes a sterilization and dehumidification tank 101 and a threaded cover 102 that is threadedly connected to the sterilization and dehumidification tank 101. The threaded connection ensures the sealing of the tank 1 and facilitates disassembly for replacement or cleaning of the sterilization and dehumidification filter 3, thereby improving maintenance efficiency.

[0025] A sealing gasket 103 is provided at the connection between the threaded cap 102 and the sterilization and dehumidification tank 101, which further enhances the sealing performance, prevents air leakage, and maintains a positive pressure environment inside the tank 1.

[0026] During operation, external compressed air enters tank 1 through compressed air inlet pipe 2, and becomes dry and sterile air after being treated by sterilization and dehumidification filter 3. It is then delivered to the freeze dryer front chamber through dry and sterile air inlet pipe 4. Pressure reducing valve 5 regulates the inlet pressure, pressure gauge 6 monitors the internal pressure of tank 1 in real time, and switch valve 7 controls the airflow to ensure that the chamber maintains positive pressure when the chamber is opened, preventing outside air from entering, preventing freeze-dried products from absorbing moisture and becoming contaminated, improving product qualification rate, and reducing quality risks and production costs.

[0027] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0028] Those skilled in the art will understand that the above embodiments are specific examples of implementing the present invention, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A device for preventing product moisture absorption in a freeze dryer, characterized in that: The equipment includes a tank (1) for containing dry and sterilized air, a compressed air inlet pipe (2) for connecting to an external compressed air source, a sterilization and dehumidification filter (3) for dehumidifying and sterilizing the incoming compressed air, a dry and sterile air inlet pipe (4) for delivering the treated dry and sterile air to the front chamber of the freeze dryer, a pressure reducing valve (5) for adjusting the air pressure entering the tank (1), a pressure gauge (6) for monitoring the pressure inside the tank (1) and a switch valve (7) for controlling the flow of dry air.

2. The freeze dryer moisture-prevention device according to claim 1, characterized in that: The tank body (1) is made of 304 stainless steel.

3. The freeze dryer moisture-prevention device according to claim 1, characterized in that: A control regulating valve (8) is installed on the compressed air inlet pipe (2).

4. The freeze dryer moisture-prevention device according to claim 1, characterized in that: The pressure reducing valve (5), pressure gauge (6) and control regulating valve (8) are all connected to the compressed air inlet pipe (2) through the first quick-connect clamp (9), and the switch valve (7) is connected to the dry sterile air inlet pipe (4) through the second quick-connect clamp (10).

5. The freeze dryer moisture-prevention device according to claim 1, characterized in that: Both the compressed air inlet pipe (2) and the sterile air inlet pipe (4) are made of stainless steel.

6. The freeze dryer moisture-prevention device according to claim 1, characterized in that: The compressed air inlet pipe (2) is directly connected to the external air compressor room storage tank through the PU air compressor pipe.

7. The freeze dryer moisture-prevention device according to claim 1, characterized in that: The tank (1) includes a sterilization and dehumidification tank (101) and a threaded cover (102) that is threadedly connected to the sterilization and dehumidification tank (101).

8. A device for preventing product moisture absorption in a freeze dryer according to claim 7, characterized in that: A sealing gasket (103) is provided at the connection between the threaded cap (102) and the sterilization and dehumidification tank (101).

Images