Cooling circulation device of vacuum drying machine

Abstract

The utility model discloses a cooling circulation device of a vacuum drier, which comprises a heater (1) used for heating the vacuum drier, a first circulating water pump (2) is arranged in front of a water inlet of the heater (1), and the front end of the first circulating water pump (2) is connected with a water outlet of a three-way valve (3). Two water inlets at the front end of the three-way valve (3) are respectively connected with a hot water tank (4) and a cooling water tank (5) through a third branch pipe (10) and a fourth branch pipe (11), a water outlet main pipe (6) is arranged on the rear side of a water outlet of the heater (1), and a first branch pipe (7) connected with the hot water tank (4) and a second branch pipe (9) connected with the cooling water tank (5) are arranged on the water outlet main pipe (6); and a heat exchange mechanism for controlling the temperature of cooling water is arranged on one side of the cooling water tank (5). Materials can be rapidly cooled, and the possibility that the materials are polluted is reduced.

Description

Technical Field

[0001] The utility model relates to a cooling circulation device, in particular to a cooling circulation device of a vacuum dryer. Background Art

[0002] A vacuum dryer is mainly used to place an object or substance in a vacuum environment and remove moisture or other volatile substances therein by reducing pressure, so as to achieve the purpose of drying. The existing vacuum dryer mainly dries the materials in the cabin by flowing hot water on the inner wall of the dryer. However, in such a drying method, the temperature of the materials is relatively high after drying, and it usually takes several hours to cool completely. The materials not only occupy the dryer for a long time, but also there is a possibility of material contamination during this process. Content of the Utility Model

[0003] The purpose of the utility model is to provide a cooling circulation device of a vacuum dryer. It can quickly cool the materials and reduce the possibility of material contamination.

[0004] The technical solution of the utility model: A cooling circulation device of a vacuum dryer includes a heater for heating the vacuum dryer. A first circulation pump is provided in front of the water inlet of the heater. The front end of the first circulation pump is connected to the water outlet of a three-way valve. The two water inlets at the front end of the three-way valve are respectively connected to a hot water tank and a cooling water tank through a third branch pipe and a fourth branch pipe. A water outlet main pipe is provided behind the water outlet of the heater. The water outlet main pipe is provided with a first branch pipe connecting to the hot water tank and a second branch pipe connecting to the cooling water tank. A second temperature sensor for detecting the water outlet temperature of the heater is provided on the water outlet main pipe. A heat exchange mechanism for controlling the temperature of the cooling water is provided on one side of the cooling water tank.

[0005] In the foregoing cooling circulation device of a vacuum dryer, the heat exchange mechanism includes a heat exchanger. A fifth branch pipe connecting to the cooling water tank is provided at the cooling water outlet of the heat exchanger. A sixth branch pipe connecting to the cooling water tank is provided at the cooling water inlet of the heat exchanger. A fifth control valve is provided on the fifth branch pipe. A second circulation pump for driving the water in the cooling water tank to flow is provided on the sixth branch pipe. A first temperature sensor for detecting the temperature of the cooling water is provided in the heat exchanger. The hot water supply pipe and the hot water return pipe on the heat exchanger are connected to an external refrigeration unit.

[0006] In the foregoing cooling circulation device of a vacuum dryer, the heat exchanger includes a casing. A bent flow pipeline is provided in the casing. The two ends of the flow pipeline are respectively connected to the hot water supply pipe and the hot water return pipe. Multiple groups of partition plates for guiding the external liquid of the flow pipeline to flow are provided on the flow pipeline. Heat exchange fins are provided outside the flow pipeline and are arranged in a staggered manner and can make the liquid flow in a bent manner between the partition plates. The two ends of the external flow channel of the flow pipeline are respectively connected to the fifth branch pipe and the sixth branch pipe.

[0007] In the cooling circulation device of the aforementioned vacuum dryer, a first control valve is provided on the third branch pipe.

[0008] In the cooling circulation device of the aforementioned vacuum dryer, a third control valve is provided on the fourth branch pipe.

[0009] In the cooling circulation device of the aforementioned vacuum dryer, a second control valve is provided on the first branch pipe.

[0010] In the cooling circulation device of the aforementioned vacuum dryer, a fourth control valve is provided on the second branch pipe.

[0011] Compared with the prior art, the present utility model cools the heater by setting a cooling water tank, thereby realizing the cooling of the vacuum dryer. And in order to further improve the cooling effect, the present application sets a heat exchange mechanism to control the temperature of the water in the cooling water tank to prevent the water temperature in the cooling water tank from being too high and unable to achieve a good cooling effect. The heat exchange mechanism can exchange heat between the chilled water produced by the refrigeration unit and the cooling water in the cooling water tank through a heat exchanger, thereby reducing the temperature of the cooling water and achieving a better cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic structural diagram of the present utility model;

[0013] Figure 2 is a schematic structural diagram of the heat exchanger of the present utility model.

[0014] The reference signs in the drawings are: 1 - heater, 2 - first circulation water pump, 3 - three-way valve, 4 - hot water tank, 5 - cooling water tank, 6 - outlet main pipe, 7 - first branch pipe, 9 - second branch pipe, 10 - third branch pipe, 11 - fourth branch pipe, 12 - heat exchanger, 13 - fifth branch pipe, 14 - sixth branch pipe, 15 - second circulation water pump, 16 - first temperature sensor, 17 - hot water supply pipe, 18 - hot water return pipe, 20 - first control valve, 21 - third control valve, 22 - second control valve, 23 - fourth control valve, 24 - machine shell, 25 - flow pipeline, 26 - partition board, 27 - heat exchange fin, 28 - second temperature sensor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] The present utility model will be further described below with reference to the drawings and embodiments, but it shall not be used as a basis for limiting the present utility model.

[0016] Embodiment. A cooling circulation device of a vacuum dryer is configured as Figure 1-2As shown, it includes a heater 1 for heating a vacuum dryer. A first circulation water pump 2 is provided in front of the water inlet of the heater 1. The front end of the first circulation water pump 2 is connected to the water outlet of a three-way valve 3. The two water inlets at the front end of the three-way valve 3 are respectively connected to a hot water tank 4 and a cooling water tank 5 through a third branch pipe 10 and a fourth branch pipe 11. A water outlet main pipe 6 is provided behind the water outlet of the heater 1. A first branch pipe 7 connecting to the hot water tank 4 and a second branch pipe 9 connecting to the cooling water tank 5 are provided on the water outlet main pipe 6. A second temperature sensor 28 for detecting the water outlet temperature of the heater 1 is provided on the water outlet main pipe 6; a heat exchange mechanism for controlling the temperature of the cooling water is provided on one side of the cooling water tank 5.

[0017] The heat exchange mechanism includes a heat exchanger 12. A fifth branch pipe 13 connecting to the cooling water tank 5 is provided at the cooling water outlet of the heat exchanger 12. A sixth branch pipe 14 connecting to the cooling water tank 5 is provided at the cooling water inlet of the heat exchanger 12. A fifth control valve 19 is provided on the fifth branch pipe 13. A second circulation water pump 15 for driving the water in the cooling water tank to flow is provided on the sixth branch pipe 14. A first temperature sensor 16 for detecting the temperature of the cooling water is provided in the heat exchanger 12. The hot water supply pipe 17 and the hot water return pipe 18 on the heat exchanger 12 are connected to an external refrigeration unit.

[0018] The heat exchanger 12 includes a housing 24. A bent flow pipeline 25 is provided in the housing 24. The two ends of the flow pipeline 25 are respectively connected to the hot water supply pipe 17 and the hot water return pipe 18. Multiple groups of partitions 26 for guiding the external liquid of the flow pipeline 25 to flow are provided on the flow pipeline 25. Heat exchange fins 27 which are arranged in a staggered manner and can make the liquid flow in a bent manner between the partitions are provided outside the flow pipeline 25. The two ends of the external flow channel of the flow pipeline 25 are respectively connected to the fifth branch pipe 13 and the sixth branch pipe 14.

[0019] A first control valve 20 is provided on the third branch pipe 10.

[0020] A third control valve 21 is provided on the fourth branch pipe 11.

[0021] A second control valve 22 is provided on the first branch pipe 7.

[0022] A fourth control valve 23 is provided on the second branch pipe 9.

[0023] Principle of the present utility model: In this application, the vacuum dryer is heated by the heater 1, and the heat source of the heater 1 comes from the hot water tank 4. When heating the vacuum dryer, the third control valve 21 and the fourth control valve 24 are closed, and the hot water in the hot water tank 4 moves towards the heater 1 under the action of the circulation water pump to heat the vacuum dryer and achieve the drying of the material. After the drying is completed, the material will be at a relatively high temperature. Generally, the temperature of the medicinal material after drying is about 80 degrees Celsius. It usually takes more than 2 hours for the medicinal material to cool naturally. During this period, it will not only occupy the space of the vacuum dryer, but also there is a possibility that the material is polluted by the outside air. And during the vacuum drying process, the first temperature sensor 16 will detect the temperature of the cooling water. If the temperature of the cooling water is high, the fifth control valve 19 will be opened, and under the action of the second water pump 15, the cooling water will exchange heat in the heat exchanger 12. The hot water supply pipe 17 and the hot water return pipe 18 on the heat exchanger 12 are connected to an external refrigeration unit, and the chilled water produced by the refrigeration unit is used to cool the cooling water. The refrigeration unit uses an existing refrigeration unit, so it is not described in detail in the specification. Finally, the temperature of the cooling water is maintained at a lower temperature. In this application, the cooling water in the cooling water tank 5 flows through the heater 1 to reduce the temperature of the vacuum dryer and improve the cooling effect. When cooling, the first control valve 20 and the second control valve 22 are closed, and the third control valve 21 and the fourth control valve 23 are opened, so that the cooling water in the cooling water tank 5 flows towards the heater 1 under the action of the first circulation water pump 2. At this time, the flow of the cooling water will take away the heat in the vacuum dryer, so that the material in the vacuum dryer cools down quickly. The temperature of the cooling water will gradually increase during the cooling process. The second temperature sensor 28 can detect the temperature of the cooling water flowing out of the heater 1. When the detected temperature is high, specifically 28 degrees Celsius, the fifth control valve 19 is opened, so that the cooling water will exchange heat through the heat exchanger 12 to reduce the temperature of the cooling water. When exchanging heat, the chilled water produced by the refrigeration unit will enter from the hot water supply pipe 17 and bend and flow in the flow pipeline 25, so that the flow time is longer and the heat exchange effect is better. The partition plate 26 on the flow pipeline 25 can divide the space in the casing 24 into flow channels corresponding to the flow pipeline 25. Further, heat exchange fins 27 are also provided on the flow pipeline 25. The heat exchange fins 27 can improve the heat exchange effect, and the heat exchange fins 27 can be arranged in a staggered manner, so that the cooling water can also bend and flow between adjacent partition plates to further improve the heat exchange effect. When the first temperature sensor detects that the temperature of the cooling water is as low as 25 degrees Celsius, the second circulation water pump and the second control valve are closed.

Claims

1. A cooling cycle device for a vacuum dryer, characterized in that: It includes a heater (1) for heating a vacuum dryer. A first circulation water pump (2) is provided in front of the water inlet of the heater (1). The front end of the first circulation water pump (2) is connected to the water outlet of a three-way valve (3). The two water inlets at the front end of the three-way valve (3) are respectively connected to a hot water tank (4) and a cooling water tank (5) through a third branch pipe (10) and a fourth branch pipe (11). A water outlet main pipe (6) is provided behind the water outlet of the heater (1). A first branch pipe (7) connecting to the hot water tank (4) and a second branch pipe (9) connecting to the cooling water tank (5) are provided on the water outlet main pipe (6). A second temperature sensor (28) for detecting the water outlet temperature of the heater (1) is provided on the water outlet main pipe (6); a heat exchange mechanism for controlling the temperature of the cooling water is provided on one side of the cooling water tank (5).

2. The cooling cycle device of a vacuum dryer according to claim 1, characterized in that: The heat exchange mechanism includes a heat exchanger (12). A fifth branch pipe (13) connecting to the cooling water tank (5) is provided at the cooling water outlet of the heat exchanger (12). A sixth branch pipe (14) connecting to the cooling water tank (5) is provided at the cooling water inlet of the heat exchanger (12). A fifth control valve (19) is provided on the fifth branch pipe (13). A second circulation water pump (15) for driving the water in the cooling water tank to flow is provided on the sixth branch pipe (14). A first temperature sensor (16) for detecting the temperature of the cooling water is provided in the heat exchanger (12). The hot water supply pipe (17) and the hot water return pipe (18) on the heat exchanger (12) are connected to an external refrigeration unit.

3. The cooling cycle device of a vacuum dryer according to claim 2, characterized in that: The heat exchanger (12) includes a casing (24). A bent flow pipeline (25) is provided in the casing (24). The two ends of the flow pipeline (25) are respectively connected to the hot water supply pipe (17) and the hot water return pipe (18). A plurality of partition plates (26) for guiding the external liquid of the flow pipeline (25) to flow are provided on the flow pipeline (25). Heat exchange fins (27) which are arranged in a staggered manner and can make the liquid flow in a bent manner between the partition plates are provided outside the flow pipeline (25). The two ends of the external flow channel of the flow pipeline (25) are respectively connected to the fifth branch pipe (13) and the sixth branch pipe (14).

4. The cooling cycle device of a vacuum dryer according to claim 1, characterized in that: A first control valve (20) is provided on the third branch pipe (10).

5. The cooling cycle device of a vacuum dryer according to claim 1, characterized in that: A third control valve (21) is provided on the fourth branch pipe (11).

6. The cooling cycle device of a vacuum dryer according to claim 1, characterized in that: A second control valve (22) is provided on the first branch pipe (7).

7. The cooling cycle device of a vacuum dryer according to claim 1, characterized in that: A fourth control valve (23) is provided on the second branch pipe (9).

Images