Stable-operation vacuum freeze dryer

Abstract

The utility model discloses a vacuum freeze dryer capable of operating stably, which relates to the technical field of vacuum freeze dryers, and aims to solve the problems that the existing vacuum freeze dryer is insufficient in quick and stable freezing and heating, and the overall working stability and the working efficiency need to be improved. An inner containing frame is installed in the cabinet body, a flowing cavity is formed in the inner containing frame, a refrigerant liquid storage box is fixedly installed on the back of the cabinet body, a refrigerant liquid inlet pipe is fixedly connected to the lower surface of the refrigerant liquid storage box, and the other end of the refrigerant liquid inlet pipe is fixedly connected to the lower surface of the inner containing frame. A refrigerant liquid return pipe is fixedly connected to the upper surface of the inner containing frame, and the other end of the refrigerant liquid return pipe is fixedly connected to the upper surface of the refrigerant liquid storage box. And the effects of quick and stable freezing or heating operation, high working stability and high working efficiency are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum freeze dryers, and particularly relates to a vacuum freeze dryer with stable operation. Background Art

[0002] Vacuum freeze dryers are applicable to the drying of high-grade raw materials for medicines, traditional Chinese medicine pieces, biological products, wild vegetables, dehydrated vegetables, foods, fruits, chemicals, pharmaceutical intermediates and other materials. The vacuum freeze dryer first freezes and evacuates the items to be processed, converts the water in the objects into ice, and then heats the items, so that the ice in the items is converted into a gaseous state, realizing the sublimation operation, removing the water in the items while avoiding the destruction of the molecular cells in the items.

[0003] Existing vacuum freeze dryers have deficiencies in rapid and stable freezing and heating, and the overall working stability and working efficiency need to be improved. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a vacuum freeze dryer with stable operation, which can perform rapid and stable freezing or heating operations, has high working stability and high working efficiency.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A vacuum freeze dryer with stable operation includes a cabinet body. An inner placement rack is installed inside the cabinet body. A flow cavity is arranged inside the inner placement rack. A refrigerant liquid storage tank is fixedly installed on the back of the cabinet body. A refrigerant inlet pipe is fixedly connected to the lower surface of the refrigerant liquid storage tank. The other end of the refrigerant inlet pipe is fixedly connected to the lower surface of the inner placement rack. A refrigerant return pipe is fixedly connected to the upper surface of the inner placement rack. The other end of the refrigerant return pipe is fixedly connected to the upper surface of the refrigerant liquid storage tank. Solenoid valves are arranged at the liquid inlet port of the refrigerant return pipe and the liquid outlet port of the refrigerant inlet pipe. A heat transfer oil liquid storage tank is fixedly installed on the side surface of the cabinet body. A heat medium inlet pipe is fixedly connected to the lower surface of the heat transfer oil liquid storage tank. The other end of the heat medium inlet pipe is fixedly connected to the lower surface of the inner placement rack. A heat medium return pipe is fixedly connected to the upper surface of the inner placement rack. The other end of the heat medium return pipe is fixedly connected to the upper surface of the heat transfer oil liquid storage tank. Solenoid valves are arranged at the liquid inlet end of the heat medium return pipe and the liquid outlet end of the heat medium inlet pipe. First delivery pumps are installed in the pipelines of the heat medium inlet pipe and the refrigerant inlet pipe.

[0007] By adopting the above technical solution, when refrigerating the material to be processed, the refrigerant can be passed through the internal cavity of the inner placement rack, and when heating the material to be processed, the heat-conducting oil can be passed through the internal cavity of the inner placement rack, enabling rapid and stable freezing or heating operations.

[0008] Further, an air extraction pipe is fixedly connected to the back of the cabinet body, and a vacuum pump is fixedly installed in the pipeline of the air extraction pipe.

[0009] By adopting the above technical solution, the inside of the cabinet body can be evacuated by using the vacuum pump and the air extraction pipe.

[0010] Further, a refrigeration mechanism is provided on the back of the cabinet body, and the radiator of the refrigeration mechanism is placed inside the refrigerant liquid storage tank.

[0011] By adopting the above technical solution, the refrigerant inside the refrigerant liquid storage tank can be continuously refrigerated by using the refrigeration mechanism.

[0012] Further, a resistance heating pipe is fixedly installed on the inner wall of the heat-conducting oil liquid storage tank.

[0013] By adopting the above technical solution, the heat-conducting oil in the heat-conducting oil liquid storage tank can be heated by using the resistance heating pipe.

[0014] Further, a main drain pipe is fixedly connected to the lower surface of the inner placement rack. The liquid outlet ends of the main drain pipe are respectively communicated with a first drain branch pipe and a second drain branch pipe. A second transfer pump is fixedly installed in the pipeline of the main drain pipe. Solenoid valves are provided at the liquid inlet port of the main drain pipe, on the pipeline of the first drain branch pipe, and on the pipeline of the second drain branch pipe.

[0015] By adopting the above technical solution, the residual refrigerant or heat-conducting oil in the internal cavity of the inner placement rack can be pumped out by using the second transfer pump and the main drain pipe, ensuring that the refrigerant and the heat-conducting oil do not mix.

[0016] Further, the liquid outlet end of the first drain branch pipe is fixedly connected to the lower surface of the heat-conducting oil liquid storage tank, and the liquid outlet end of the second drain branch pipe is fixedly connected to the lower surface of the refrigerant liquid storage tank.

[0017] By adopting the above technical solution, the discharged refrigerant and heat-conducting oil can be effectively placed in the corresponding liquid storage tanks.

[0018] In summary, the beneficial technical effects of the present utility model are as follows:

[0019] When the present utility model cools the interior of the cabinet body, the solenoid valves on the heat medium inlet pipe and the heat medium return pipe can be closed, and then the first transfer pump on the refrigerant inlet pipe is started. At this time, the first transfer pump can introduce the refrigerant inside the refrigerant storage tank along the refrigerant inlet pipe into the internal flow cavity of the inner placement rack. As the refrigerant continuously flows into the inner placement rack, it finally flows back into the refrigerant storage tank through the refrigerant return pipe. At this time, the refrigerant can effectively cool the inner placement rack. Since the items to be processed are placed in the inner placement cavity of the inner placement rack, this can perform fast and stable freezing operations. When it is necessary to heat the items to be processed, the refrigerant in the internal cavity of the inner placement rack is emptied, and then the solenoid valves on the refrigerant inlet pipe and the refrigerant return pipe are closed. Then, the first transfer pump on the heat medium inlet pipe is used to transport the high-temperature heat-conducting oil in the heat-conducting oil storage tank to the internal cavity of the inner placement rack. As the heat-conducting oil continues to be input, finally the heat-conducting oil flows back into the heat-conducting oil storage tank through the heat medium return pipe. At this time, the high-temperature flowing heat-conducting oil can effectively increase the temperature of the inner placement rack, and then can perform sublimation operations on the ice on the surface of the material to be processed in the inner placement cavity of the inner placement rack. The dryer can achieve fast and stable heating operations, the working stability of the entire dryer is effectively improved, and the working rate of the dryer is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the first perspective view of the three-dimensional structure of the present utility model;

[0021] Figure 2 is the second perspective view of the three-dimensional structure of the present utility model;

[0022] Figure 3 is the third perspective view of the three-dimensional structure of the present utility model;

[0023] Figure 4 is the internal structure diagram of the present utility model.

[0024] In the figure: 1, cabinet body; 2, inner placement rack; 3, refrigerant storage tank; 4, heat medium inlet pipe; 5, heat medium return pipe; 6, refrigerant return pipe; 7, refrigerant inlet pipe; 8, drain main pipe; 9, first drain branch pipe; 10, second drain branch pipe; 11, refrigeration mechanism; 12, heat-conducting oil storage tank; 13, resistance heating tube; 14, first transfer pump; 15, air extraction pipe; 16, vacuum pump; 17, second transfer pump. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The following further details the method of the present utility model with reference to the accompanying drawings.

[0026] Refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4, A vacuum freeze dryer with stable operation, including a cabinet body 1. An inner placement rack 2 is installed inside the cabinet body 1. A flow cavity is arranged inside the inner placement rack 2. A refrigerant liquid storage tank 3 is fixedly installed on the back of the cabinet body 1. A refrigerant inlet pipe 7 is fixedly connected to the lower surface of the refrigerant liquid storage tank 3. The other end of the refrigerant inlet pipe 7 is fixedly connected to the lower surface of the inner placement rack 2. A refrigerant return pipe 6 is fixedly connected to the upper surface of the inner placement rack 2. The other end of the refrigerant return pipe 6 is fixedly connected to the upper surface of the refrigerant liquid storage tank 3. Solenoid valves are arranged at the liquid inlet port of the refrigerant return pipe 6 and the liquid outlet port of the refrigerant inlet pipe 7. A heat transfer oil liquid storage tank 12 is fixedly installed on the side surface of the cabinet body 1. A heat medium inlet pipe 4 is fixedly connected to the lower surface of the heat transfer oil liquid storage tank 12. The other end of the heat medium inlet pipe 4 is fixedly connected to the lower surface of the inner placement rack 2. A heat medium return pipe 5 is fixedly connected to the upper surface of the inner placement rack 2. The other end of the heat medium return pipe 5 is fixedly connected to the upper surface of the heat transfer oil liquid storage tank 12. Solenoid valves are arranged at the liquid inlet end of the heat medium return pipe 5 and the liquid outlet end of the heat medium inlet pipe 4. First transfer pumps 14 are installed in the pipelines of the heat medium inlet pipe 4 and the refrigerant inlet pipe 7. A refrigeration mechanism 11 is arranged on the back of the cabinet body 1. The radiator of the refrigeration mechanism 11 is placed inside the refrigerant liquid storage tank 3. A resistance heating pipe 13 is fixedly installed on the inner wall of the heat transfer oil liquid storage tank 12. When cooling the inside of the cabinet body 1, the solenoid valves on the heat medium inlet pipe 4 and the heat medium return pipe 5 can be closed, and then the first transfer pump 14 on the refrigerant inlet pipe 7 is started. At this time, the first transfer pump 14 can introduce the refrigerant inside the refrigerant liquid storage tank 3 into the internal flow cavity of the inner placement rack 2 along the refrigerant inlet pipe 7. As the refrigerant continuously flows into the inner placement rack 2, it finally flows back into the refrigerant liquid storage tank 3 from the refrigerant return pipe 6. At this time, the refrigerant can effectively cool the inner placement rack 2. Since the item to be processed is placed in the internal placement cavity of the inner placement rack 2, this can perform rapid and stable freezing operations. When it is necessary to heat the item to be processed, the refrigerant in the internal cavity of the inner placement rack 2 is emptied. Then, the solenoid valves on the refrigerant inlet pipe 7 and the refrigerant return pipe 6 are closed, and then the first transfer pump 14 on the heat medium inlet pipe 4 is used to transport the high-temperature heat transfer oil in the heat transfer oil liquid storage tank 12 to the internal cavity of the inner placement rack 2. As the heat transfer oil continues to be input, finally the heat transfer oil flows back into the heat transfer oil liquid storage tank 12 from the heat medium return pipe 5. At this time, the high-temperature flowing heat transfer oil can effectively increase the temperature of the inner placement rack 2, and then can perform sublimation operations on the ice on the surface of the material to be processed in the internal placement cavity of the inner placement rack 2. The dryer can achieve rapid and stable heating operations, effectively improving the working stability of the entire dryer and effectively improving the working rate of the dryer. During the operation of the dryer, the refrigeration mechanism 11 is used to refrigerate the refrigerant inside the refrigerant liquid storage tank 3, and the resistance heating pipe 13 is used to heat the heat transfer oil inside the heat transfer oil liquid storage tank 12.

[0027] Refer to Figure 2 , a suction pipe 15 is fixedly connected to the back of the cabinet body 1, and a vacuum pump 16 is fixedly installed in the pipeline of the suction pipe 15. The air inside the cabinet body 1 can be extracted by using the vacuum pump 16 and the suction pipe 15 to perform a vacuum pumping operation on the inside of the cabinet body 1.

[0028] Refer to Figure 2 , Figure 3 , a liquid discharge main pipe 8 is fixedly connected to the lower surface of the inner placement rack 2. The liquid discharge ends of the liquid discharge main pipe 8 are respectively communicated with a first liquid discharge branch pipe 9 and a second liquid discharge branch pipe 10. A second transfer pump 17 is fixedly installed in the pipeline of the liquid discharge main pipe 8. Solenoid valves are provided at the liquid inlet port of the liquid discharge main pipe 8, on the pipeline of the first liquid discharge branch pipe 9, and on the pipeline of the second liquid discharge branch pipe 10. The liquid discharge end of the first liquid discharge branch pipe 9 is fixedly connected to the lower surface of the heat transfer oil storage tank 12, and the liquid discharge end of the second liquid discharge branch pipe 10 is fixedly connected to the lower surface of the refrigerant storage tank 3. After refrigeration is completed, the solenoid valves on the liquid discharge main pipe 8 and the second liquid discharge branch pipe 10 can be opened, and then the second transfer pump 17 is started. At this time, the second transfer pump 17 can transport the refrigerant in the inner cavity of the inner placement rack 2 to the inside of the refrigerant storage tank 3. After the refrigerant in the inner cavity of the inner placement rack 2 is emptied, the solenoid valves on the liquid discharge main pipe 8 and the second liquid discharge branch pipe 10 are closed. Similarly, after heating is completed, the solenoid valve on the first liquid discharge branch pipe 9 is opened so that the heat transfer oil can flow into the inside of the heat transfer oil storage tank 12. This structure can effectively prevent the heat transfer oil from mixing with the refrigerant.

[0029] Working principle: When in use, first install the dryer at the designated position, then place the tray containing the items to be processed in the placement cavity of the inner placement rack 2, then close the cabinet door, and then start the vacuum pump 16. Use the vacuum pump 16 and the suction pipe 15 to extract the air inside the cabinet body 1, and perform a vacuum operation on the inside of the cabinet body 1. At the same time, start the refrigeration mechanism 11, and use the refrigeration mechanism 11 to refrigerate the refrigerant inside the refrigerant liquid storage tank 3. Then close the solenoid valves on the heat medium inlet pipe 4 and the heat medium return pipe 5, and then start the first delivery pump 14 on the refrigerant inlet pipe 7. At this time, the first delivery pump 14 can introduce the refrigerant inside the refrigerant liquid storage tank 3 along the refrigerant inlet pipe 7 into the internal flow cavity of the inner placement rack 2. As the refrigerant continuously flows into the inner placement rack 2, it finally flows back into the refrigerant liquid storage tank 3 from the refrigerant return pipe 6. At this time, the refrigerant can effectively refrigerate the inner placement rack 2. Since the items to be processed are placed in the placement cavity inside the inner placement rack 2, this can perform a fast and stable freezing operation. After freezing, open the solenoid valves on the drain main pipe 8 and the second drain branch pipe 10, and then start the second delivery pump 17. At this time, the second delivery pump 17 can transport the refrigerant in the internal cavity of the inner placement rack 2 to the inside of the refrigerant liquid storage tank 3. After the refrigerant in the internal cavity of the inner placement rack 2 is emptied, close the solenoid valves on the drain main pipe 8 and the second drain branch pipe 10. When it is necessary to heat the items to be processed, the resistance heating tube 13 is used to heat the heat-conducting oil inside the heat-conducting oil liquid storage tank 12. Then close the solenoid valves on the refrigerant inlet pipe 7 and the refrigerant return pipe 6, and then use the first delivery pump 14 on the heat medium inlet pipe 4 to transport the high-temperature heat-conducting oil in the heat-conducting oil liquid storage tank 12 to the internal cavity of the inner placement rack 2. As the heat-conducting oil continues to be input, finally the heat-conducting oil flows back into the heat-conducting oil liquid storage tank 12 from the heat medium return pipe 5. At this time, the high-temperature flowing heat-conducting oil can effectively increase the temperature of the inner placement rack 2, and then can perform a sublimation operation on the ice on the surface of the items to be processed in the placement cavity inside the inner placement rack 2. At this time, the items can be dried. After the processing is completed, open the cabinet door and remove the items.

[0030] The embodiments of this specific implementation manner are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A vacuum freeze dryer with stable operation, comprising a cabinet body (1), characterized in that: An inner placement rack (2) is installed inside the cabinet body (1). A flow cavity is arranged inside the inner placement rack (2). A refrigerant liquid storage tank (3) is fixedly installed on the back of the cabinet body (1). A refrigerant inlet pipe (7) is fixedly connected to the lower surface of the refrigerant liquid storage tank (3). The other end of the refrigerant inlet pipe (7) is fixedly connected to the lower surface of the inner placement rack (2). A refrigerant return pipe (6) is fixedly connected to the upper surface of the inner placement rack (2). The other end of the refrigerant return pipe (6) is fixedly connected to the upper surface of the refrigerant liquid storage tank (3). Solenoid valves are arranged at the liquid inlet port of the refrigerant return pipe (6) and the liquid outlet port of the refrigerant inlet pipe (7). A heat transfer oil liquid storage tank (12) is fixedly installed on the side surface of the cabinet body (1). A heat medium inlet pipe (4) is fixedly connected to the lower surface of the heat transfer oil liquid storage tank (12). The other end of the heat medium inlet pipe (4) is fixedly connected to the lower surface of the inner placement rack (2). A heat medium return pipe (5) is fixedly connected to the upper surface of the inner placement rack (2). The other end of the heat medium return pipe (5) is fixedly connected to the upper surface of the heat transfer oil liquid storage tank (12). Solenoid valves are arranged at the liquid inlet end of the heat medium return pipe (5) and the liquid outlet end of the heat medium inlet pipe (4). A first transfer pump (14) is installed in the pipelines of the heat medium inlet pipe (4) and the refrigerant inlet pipe (7).

2. A vacuum freeze dryer with stable operation according to claim 1, characterized in that: An air extraction pipe (15) is fixedly connected to the back of the cabinet body (1). A vacuum pump (16) is fixedly installed in the pipeline of the air extraction pipe (15).

3. A vacuum freeze dryer with stable operation according to claim 1, characterized in that: A refrigeration mechanism (11) is arranged on the back of the cabinet body (1). The radiator of the refrigeration mechanism (11) is placed inside the refrigerant liquid storage tank (3).

4. A vacuum freeze dryer with stable operation according to claim 1, characterized in that: A resistance heating pipe (13) is fixedly installed on the inner wall of the heat transfer oil liquid storage tank (12).

5. A vacuum freeze dryer with stable operation according to claim 1, characterized in that: A liquid discharge main pipe (8) is fixedly connected to the lower surface of the inner placement rack (2). The liquid outlet end of the liquid discharge main pipe (8) is respectively communicated with a first liquid discharge branch pipe (9) and a second liquid discharge branch pipe (10). A second transfer pump (17) is fixedly installed in the pipeline of the liquid discharge main pipe (8). Solenoid valves are arranged at the liquid inlet port of the liquid discharge main pipe (8), on the pipeline of the first liquid discharge branch pipe (9), and on the pipeline of the second liquid discharge branch pipe (10).

6. The vacuum freeze dryer with stable operation according to claim 5, wherein: The liquid outlet end of the first liquid discharge branch pipe (9) is fixedly connected to the lower surface of the heat transfer oil liquid storage tank (12). The liquid outlet end of the second liquid discharge branch pipe (10) is fixedly connected to the lower surface of the refrigerant liquid storage tank (3).

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