Cooling water system for vacuum microwave drying equipment

Abstract

The utility model relates to the technical field of pharmaceutical equipment, in particular to a cooling water system for vacuum microwave drying equipment. Comprising a cooling tower, a third water tank, an air-cooled heat pump assembly, an anti-freezing assembly and a second circulating pump, the cooling tower is provided with a second water outlet pipe and a second water inlet pipe, the third water tank is provided with a sixth water outlet pipe, the first water outlet pipe communicates with the second water inlet pipe, the second water outlet pipe communicates with the interior of the third water tank, and the sixth water outlet pipe communicates with the first water inlet pipe; the sixth water outlet pipe is connected in series with a second circulating pump; the third water tank communicates with the air-cooled heat pump assembly, and an anti-freezing assembly communicates between the second water inlet pipe and the second water outlet pipe. The cooling tower is arranged to cool water flowing out of the vacuum microwave drying equipment, meanwhile, the anti-freezing assembly is arranged, it can be ensured that a cooling water system of the vacuum microwave drying equipment is in a working state all the time, the cooling tower is heated at low temperature in winter, water in the cooling tower is prevented from being frozen to cause frost crack of a water pipe, and the maintenance cost is reduced; and the normal operation of the cooling water system is also ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of pharmaceutical equipment, in particular to a cooling water system for vacuum microwave drying equipment. Background Art

[0002] Vacuum microwave drying equipment is a new type of drying equipment that integrates microwave heating technology and vacuum drying technology. It uses the characteristics of microwaves to heat and dry materials in a vacuum. It has the characteristics of strong microwave penetration, fast drying speed, and high thermal efficiency. It can dry materials at a lower temperature and better maintain the chemical composition of materials. However, magnetrons play a core role in the microwave drying process. They generate microwaves through energy exchange. This process is accompanied by the acceleration and impact of electrons. These electrons lose energy during movement and convert it into heat energy. The anode temperature of the magnetron will rise, especially under high-power working conditions. The increase in anode temperature is more significant. If this heat is not dissipated in time, it will cause the magnetron to overheat and fail to work properly. In severe cases, it may even burn the tube. Therefore, in order to ensure the stable operation of the magnetron and extend its service life, effective cooling measures must be taken to ensure the normal operation and drying effect of the equipment. The cooling medium includes water, oil, composite medium, etc. Due to the particularity of the pharmaceutical industry, the medium in the cooling system can only be purified water. When the machine is shut down in winter, even if the water in the pipeline is released, there will often be low places that cannot be emptied, which will freeze the pipeline and cause high maintenance costs.

[0003] The cooling system mainly includes air-cooled heat pump units, cooling towers, etc. If only air-cooled heat pump units are used for cooling, the power consumption is large and the operating cost is high; and because the equipment is installed outdoors, the low temperature alarm of the equipment will not work normally due to the low temperature outdoors in winter, and the water pipes will freeze and crack when it is shut down in winter. If only cooling towers are used for cooling, the temperature required for the normal operation of the cooling water system of the vacuum microwave drying equipment cannot be guaranteed due to the high outdoor temperature in summer; the water pipes will also freeze and crack when it is shut down in winter, and the maintenance cost is high.

[0004] The existing cooling system for vacuum microwave drying equipment cannot ensure that the cooling water system of the vacuum microwave drying equipment is always in normal working condition, and it needs to be shut down for maintenance frequently, which affects the production efficiency of medicines and increases costs.

[0005] Therefore, there is an urgent need to provide a cooling water system for vacuum microwave drying equipment, which can ensure the normal operation of the cooling water system and reduce the operating cost compared with the existing technology. Utility Model Content

[0006] The utility model solves the technical problems existing in the prior art and provides a cooling water system for vacuum microwave drying equipment.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0008] A cooling water system for vacuum microwave drying equipment comprises a cooling tower, a third water tank, an air-cooled heat pump assembly, an antifreeze assembly and a second circulating pump, wherein the cooling tower is provided with a second water outlet pipe and a second water inlet pipe, the third water tank is provided with a sixth water outlet pipe, the first water outlet pipe is communicated with the second water inlet pipe, the second water outlet pipe is communicated with the inside of the third water tank, the sixth water outlet pipe is communicated with the first water inlet pipe, and the second circulating pump is connected in series to the sixth water outlet pipe; the third water tank is communicated with the air-cooled heat pump assembly, and the antifreeze assembly is connected between the second water inlet pipe and the second water outlet pipe.

[0009] Furthermore, the antifreeze assembly includes a first antifreeze pipe, a second antifreeze pipe, a second water tank, a heater and a first circulating pump. The first antifreeze pipe is connected to the second water inlet pipe, the second antifreeze pipe is connected to the second water outlet pipe, the first antifreeze pipe and the second antifreeze pipe are connected by a connecting pipe, the first circulating pump and the second water tank are connected in series in sequence along the water flow direction on the connecting pipe, and the heater is arranged inside the second water tank.

[0010] Furthermore, the connecting pipe is also connected to a water replenishment assembly, which is connected to one end of the connecting pipe close to the second antifreeze pipe. The water replenishment assembly includes a control valve assembly, a water replenishment pipe and a constant pressure tank. The water replenishment pipe is connected to the connecting pipe, and the constant pressure tank and the control valve assembly are connected in series on the water replenishment pipe in sequence from one end close to the connecting pipe to one end far from the connecting pipe.

[0011] Furthermore, the second water inlet pipe and the second water outlet pipe are both connected in series with a control valve assembly, and the control valve assembly is used to control the opening and closing of the antifreeze assembly.

[0012] Furthermore, a heat exchanger is connected between the cooling tower and the third water tank, and the heat exchanger is provided with a third water inlet pipe, a third water outlet pipe, a cold water inlet pipe and a cold water outlet pipe. The third water inlet pipe is connected to the first water tank at one end away from the heat exchanger, and a pipeline pump is connected in series to the third water inlet pipe. The third water outlet pipe is connected to a vacuum pump at one end away from the heat exchanger, and the vacuum pump is connected to the first water tank at one end away from the third water outlet pipe; a third submersible pump is provided inside the third water tank, and the cold water inlet pipe extends into the third water tank at one end away from the heat exchanger, the cold water inlet pipe is connected to the third submersible pump, and the cold water outlet pipe is connected to the second water inlet pipe at one end away from the heat exchanger.

[0013] Furthermore, the vacuum pumps are provided in plurality and are arranged in parallel; the pipeline pumps are also provided in plurality and are arranged in parallel.

[0014] Furthermore, the second circulating pumps are provided in plurality, and the plurality of second circulating pumps are arranged in parallel.

[0015] Furthermore, the air-cooled heat pump assembly includes a first air-cooled heat pump unit and a second air-cooled heat pump unit, the first air-cooled heat pump unit and the second air-cooled heat pump unit are arranged in parallel, and the first air-cooled heat pump unit and the second air-cooled heat pump unit are both connected to the interior of the third water tank.

[0016] Furthermore, the first air-cooled heat pump unit is provided with a fourth water outlet pipe and a fourth water inlet pipe, both of which extend into the third water tank, a first submersible pump is provided inside the third water tank, and the fourth water inlet pipe is connected to the first submersible pump.

[0017] Furthermore, the second air-cooled heat pump unit is provided with a fifth water outlet pipe and a fifth water inlet pipe, both of which extend into the interior of the third water tank, a second submersible pump is provided inside the third water tank, and the fifth water inlet pipe is connected to the second submersible pump.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] (1) The utility model sets a cooling tower to cool the water flowing out of the vacuum microwave drying equipment, and sets an antifreeze component at the same time, which can ensure that the cooling water system of the vacuum microwave drying equipment is always in working condition, and heat the cooling tower at a low temperature in winter to prevent the water in the cooling tower from freezing and causing the water pipes to freeze and crack, thereby reducing maintenance costs and ensuring the normal operation of the cooling water system.

[0020] (2) In the hot summer, the utility model uses an air-cooled heat pump assembly to cool the cooling water, thereby reducing the use cost and improving the efficiency of the vacuum microwave drying equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0022] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0023] Figure 3 yes Figure 1 Enlarged view of point B in the middle.

[0024] Figure 4 yes Figure 1 Enlarged view of point C in the middle.

[0025] Figure 5 yes Figure 1 Enlarged view of point D in the middle.

[0026] Description of reference numerals:

[0027] 1. Vacuum microwave drying equipment; 101. First water outlet pipe; 102. First water inlet pipe; 2. Cooling tower; 201. Second water outlet pipe; 202. Second water inlet pipe; 3. Heat exchanger; 31. Third water outlet pipe; 32. Third water inlet pipe; 33. Cold water inlet pipe; 34. Cold water outlet pipe; 4. Pipeline pump; 5. Flexible connector; 6. Pressure gauge; 7. Thermometer; 8. Manual valve; 9. Check valve; 10. First water tank; 11. Vacuum pump; 12. First circulation pump; 13. First air-cooled heat pump unit; 131. Fourth water outlet pipe; 132. Fourth water inlet pipe; 14. Second air-cooled heat pump unit; 141. Fifth water outlet pipe; 142. Fifth water inlet pipe; 15. Pressure regulating valve; 16. First submersible pump; 17. Second submersible pump; 18. First antifreeze pipe; 19. Second antifreeze pipe; 20. Second water tank; 21. Heater; 22. Second circulation pump; 23. Water supply pipe; 24. Constant pressure tank; 25. Third water tank; 251. Sixth water outlet pipe; 26. Control valve assembly; 27. Third submersible pump. DETAILED DESCRIPTION

[0028] The technical solution of the utility model will be clearly described below in conjunction with the accompanying drawings. Obviously, the described embodiments are not all embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the utility model. It should be noted that the orientation or position relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", etc. is based on the orientation or position relationship shown in the accompanying drawings. It is only for the convenience of describing the utility model and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0029] like Figure 1 As shown, the utility model provides a cooling water system for a vacuum microwave drying equipment, including a cooling tower 2, a third water tank 25 and an air-cooled heat pump assembly, the vacuum microwave drying equipment 1 is provided with a first water inlet pipe 102 and a first water outlet pipe 101, the first water inlet pipe 102 and the first water outlet pipe 101 are respectively arranged at two ends of the vacuum microwave drying equipment 1, the cooling tower 2 includes a second water inlet pipe 202 and a second water outlet pipe 201, the third water tank 25 is provided with a sixth water outlet pipe 251, the end of the first water outlet pipe 101 away from the vacuum microwave drying equipment 1 is connected to the second water inlet pipe 202, the end of the second water outlet pipe 201 away from the cooling tower 2 extends into the interior of the third water tank 25, and the end of the sixth water outlet pipe 251 away from the third water tank 25 is connected to the first water inlet pipe 102; the air-cooled heat pump assembly is connected to the third water tank 25, and the air-cooled heat pump assembly is used to cool the water in the third water tank 25.

[0030] like Figure 1 , Figure 2 As shown, a pressure gauge 6 and a one-way valve 9 are connected in series to one end of the second water inlet pipe 202 close to the cooling tower 2, and the pressure gauge 6 connected in series on the second water inlet pipe 202 is close to the cooling tower 2 relative to the one-way valve 9. A pressure gauge 6 and a one-way valve 9 are also connected in series to one end of the second water outlet pipe 201 close to the cooling tower 2, and the pressure gauge 6 connected in series on the second water outlet pipe 201 is close to the cooling tower 2 relative to the one-way valve 9. A control valve assembly 26 is connected in series to the second water inlet pipe 202, and the control valve assembly 26 is away from the cooling tower 2 relative to the one-way valve 9 connected in series on the second water inlet pipe 202. A control valve assembly 26 is also connected in series to the second water outlet pipe 201, and the control valve assembly 26 is away from the cooling tower 2 relative to the one-way valve 9 connected in series on the second water outlet pipe 201.

[0031] An antifreeze assembly is connected between the second water inlet pipe 202 and the second water outlet pipe 201, and the antifreeze assembly includes a first antifreeze pipe 18, a second antifreeze pipe 19, a second water tank 20, a heater 21, a first circulation pump 12 and a water replenishment assembly. The first antifreeze pipe 18 is connected to the second water inlet pipe 202, and the connection between the first antifreeze pipe 18 and the second water inlet pipe 202 is located between the one-way valve 9 and the control valve assembly 26 connected in series on the second water inlet pipe 202. The second antifreeze pipe 19 is connected to the second water outlet pipe 201, and the connection between the second antifreeze pipe 19 and the second water outlet pipe 201 is located between the one-way valve 9 and the control valve assembly 26 connected in series on the second water outlet pipe 201. The first antifreeze pipe 18 and the second antifreeze pipe 19 are connected by a connecting pipe, and the pressure regulating valve 15, the water replenishing component, the first circulating pump 12, the second water tank 20 and the pressure regulating valve 15 are connected in series in sequence along the water flow direction on the connecting pipe; the heater 21 is arranged inside the second water tank 20, and the heater 21 is used to heat the water in the second water tank 20; there are two first circulating pumps 12, and the two first circulating pumps 12 are arranged in parallel; on the branch road of each parallel connection of the first circulating pump 12, a one-way valve 9, a pressure gauge 6, and a flexible connector 5 are connected in series in sequence on one side of the first circulating pump 12 along the water flow direction, and a flexible connector 5, a pressure gauge 6, a manual valve 8 and a one-way valve 9 are connected in series in sequence on the other side of the first circulating pump 12 along the water flow direction; the second water tank 20 is provided with a water inlet end and a water outlet end, and the water inlet end and the water outlet end of the second water tank 20 are both provided with a thermometer 7 and a one-way valve 9. The water supply assembly includes a control valve assembly 26, a water supply pipe 23 and a constant pressure tank 24. The water supply pipe 23 is connected to the connecting pipe. The control valve assembly 26 and the constant pressure tank 24 are connected in series in sequence from the end away from the connecting pipe to the end close to the connecting pipe. A one-way valve 9 is provided at the output end of the constant pressure tank 24. The water supply assembly is used to supply water to the second water tank 20. The constant pressure tank 24 is used to ensure that the water passing through the water supply pipe 23 is at a set pressure value. The control valve assembly 26 is connected in series to the first antifreeze pipe 18. The control valve assembly 26 connected in series to the first antifreeze pipe 18 is located at the end of the connecting pipe and the first antifreeze pipe 18 that is away from the cooling tower 2; the control valve assembly 26 is also connected in series to the second antifreeze pipe 19. The control valve assembly 26 connected in series to the second antifreeze pipe 19 is located at the end of the connecting pipe and the second antifreeze pipe 19 that is away from the cooling tower 2.

[0032] The control valve assembly 26 includes a one-way valve 9 and a pressure regulating valve 15 connected in series.

[0033] like Figure 1 , Figure 3As shown, a heat exchanger 3 is also connected between the cooling tower 2 and the third water tank 25. The heat exchanger 3 is provided with a third water inlet pipe 32, a third water outlet pipe 31, a cold water inlet pipe 33 and a cold water outlet pipe 34; the cold water inlet pipe 33 extends into the third water tank at one end away from the heat exchanger 3, a third submersible pump 27 is provided in the third water tank 25, and the cold water outlet pipe 34 is connected to the second water inlet pipe 202 of the cooling tower 2 at one end away from the heat exchanger 3. The end of the third water inlet pipe 32 away from the heat exchanger 3 is connected to the first water tank 10, and the end of the third water outlet pipe 31 away from the heat exchanger 3 is connected to multiple vacuum pumps 11, which are arranged in parallel, and each vacuum pump 11 is connected to the first water tank 10 at one end away from the third water outlet pipe 31; the third water inlet pipe 32 is connected in series with the pipeline pump 4, the one-way valve 9, the pressure gauge 6, and the thermometer 7 in sequence along the water flow direction, and there are two pipeline pumps 4, which are arranged in parallel; on the branch of each pipeline pump 4, the soft connector 5, the pressure gauge 6, the manual valve 8, and the one-way valve 9 are connected in series on one side of the pipeline pump 4 along the cold water flow direction, and the one-way valve 9, the pressure gauge 6, and the soft connector 5 are connected in series on the other side of the pipeline pump 4 along the cold water flow direction. The pressure gauge 6, the thermometer 7, and the one-way valve 9 are connected in series on the third water outlet pipe 31 in sequence along the cold water flow direction. The cold water in the third water tank 25 is pumped into the heat exchanger 3 by the third submersible pump 27 to cool the water in the first water tank 10 , thereby cooling the vacuum pump 11 .

[0034] like Figure 1 , Figure 4 , Figure 5 As shown, the air-cooled heat pump assembly includes a first air-cooled heat pump unit 13 and a second air-cooled heat pump unit 14. The first air-cooled heat pump unit 13 is connected to a fourth water outlet pipe 131 and a fourth water inlet pipe 132, and the second air-cooled heat pump unit 14 is connected to a fifth water outlet pipe 141 and a fifth water inlet pipe 142; the fourth water outlet pipe 131 and the fourth water inlet pipe 132 extend into the third water tank 25 at one end away from the first air-cooled heat pump unit 13, and the fifth water outlet pipe 141 and the fifth water inlet pipe 142 extend into the third water tank 25 at one end away from the second air-cooled heat pump unit 14; a first submersible pump 16 and a second submersible pump 17 are arranged inside the third water tank 25, the end of the fourth water inlet pipe 132 extending into the third water tank 25 is connected to the first submersible pump 16, and the end of the fifth water inlet pipe 142 extending into the third water tank 25 is connected to the second submersible pump 17. The third water tank 25 is connected to two sixth water outlet pipes 251, which are connected to the first water inlet pipe 102 after merging at the ends away from the third water tank 25, and each sixth water outlet pipe 251 is connected in series with a one-way valve 9, a second circulation pump 22 and a one-way valve 9 in sequence along the water flow direction.

[0035] The fourth water inlet pipe 132 is connected in series with a one-way valve 9, a pressure gauge 6, a thermometer 7 and a flexible connector 5 in sequence along the water flow direction, and the fourth water outlet pipe 131 is connected in series with a flexible connector 5, a pressure gauge 6, a thermometer 7 and a one-way valve 9 in sequence along the water flow direction; the fifth water inlet pipe 142 is connected in series with a one-way valve 9, a pressure gauge 6, a thermometer 7 and a flexible connector 5 in sequence along the water flow direction, and the fifth water outlet pipe 141 is connected in series with a flexible connector 5, a pressure gauge 6, a thermometer 7 and a one-way valve 9 in sequence along the water flow direction.

[0036] The first air-cooled heat pump unit 13 and the second air-cooled heat pump unit 14 are existing air-cooled heat pump units, and their structures are not repeated here. The first air-cooled heat pump unit 13 is a 197kw air-cooled heat pump unit, and the second air-cooled heat pump unit 14 is a 70kw air-cooled heat pump unit; the power of the first submersible pump 16 is 197kw, and the power of the second submersible pump 17 is 70kw.

[0037] The utility model provides a working principle of a cooling water system for a vacuum microwave drying equipment 1: start the cooling tower 2 to circulate cooling water for the vacuum microwave drying equipment 1, the water to be cooled in the vacuum microwave drying equipment 1 flows into the second water inlet pipe 202 through the first water outlet pipe 101, flows into the second water inlet pipe 202, and then flows into the cooling tower 2 for cooling, the water cooled by the cooling tower 2 flows into the third water tank 25 through the second water outlet pipe 201, the third water tank 25 stores the cooled water, the water in the third water tank 25 flows into the interior of the vacuum microwave drying equipment 1 through the first water inlet pipe 102 through the second circulation pump 22, and forms a cooling water circulation for the vacuum microwave drying equipment 1.

[0038] When the temperature is high in summer, the first air-cooled heat pump unit 13 and the second air-cooled heat pump unit 14 are activated to cool the water in the third water tank 25; the water in the third water tank 25 is pumped into the first air-cooled heat pump unit 13 for cooling by the first submersible pump 16, and the cooled water flows into the third water tank 25; the water in the third water tank 25 is pumped into the second air-cooled heat pump unit 14 for cooling by the second submersible pump 17, and the cooled water flows into the third water tank 25.

[0039] In winter, in order to prevent the water in the cooling tower 2 from freezing, the antifreeze component is started to heat the water inside the cooling tower 2 at a low temperature; the control valve components 26 connected in series on the second water inlet pipe 202, the second water outlet pipe 201, the first antifreeze pipe 18, and the second antifreeze pipe 19 are all closed, and the heater 21 heats the water in the second water tank 20. The water in the second water tank 20 flows into the cooling tower 2 through the second water inlet pipe 202, and the water in the cooling tower 2 flows into the second antifreeze pipe 19 and the connecting pipe in turn through the second water outlet pipe 201, and the first circulation pump 12 pumps the water into the second water tank 20, forming a water circulation between the antifreeze component and the cooling tower 2.

[0040] The cold water in the third water tank 25 can also enter the heat exchanger 3 through the third submersible pump 27 to cool the water in the first water tank 10 , thereby cooling the vacuum pump 11 .

[0041] The utility model is provided with a cooling tower 2, which can ensure that the cooling water system of the vacuum microwave drying equipment 1 is always in working condition. In the summer when the temperature is high, the cooling water is cooled by an air-cooled heat pump component, which reduces the use cost and improves the efficiency of the vacuum microwave drying equipment 1. At the same time, in winter, an antifreeze component is provided to heat the cooling tower 2 at a low temperature to prevent the water in the cooling tower 2 from freezing and causing the water pipes to freeze and crack, thereby reducing the maintenance cost and ensuring the normal operation of the cooling water system.

[0042] Finally, it should be noted that the above content is only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Simple modifications or equivalent substitutions of the technical solution of the utility model by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the utility model.

Claims

1. A cooling water system for a vacuum microwave drying device, wherein the vacuum microwave drying device is provided with a first water outlet pipe and a first water inlet pipe, characterized in that: It includes a cooling tower, a third water tank, an air-cooled heat pump component, an antifreeze component and a second circulating pump. The cooling tower is provided with a second water outlet pipe and a second water inlet pipe. The third water tank is provided with a sixth water outlet pipe. The first water outlet pipe is connected to the second water inlet pipe, the second water outlet pipe is connected to the inside of the third water tank, the sixth water outlet pipe is connected to the first water inlet pipe, and the second circulating pump is connected in series to the sixth water outlet pipe; the third water tank is connected to the air-cooled heat pump component, and the antifreeze component is connected between the second water inlet pipe and the second water outlet pipe.

2. A cooling water system for vacuum microwave drying equipment according to claim 1, characterized in that: The antifreeze assembly includes a first antifreeze pipe, a second antifreeze pipe, a second water tank, a heater and a first circulation pump. The first antifreeze pipe is connected to the second water inlet pipe, the second antifreeze pipe is connected to the second water outlet pipe, the first antifreeze pipe and the second antifreeze pipe are connected to a connecting pipe, the first circulation pump and the second water tank are connected in series in sequence along the water flow direction on the connecting pipe, and the heater is arranged inside the second water tank.

3. A cooling water system for vacuum microwave drying equipment according to claim 2, characterized in that: The connecting pipe is also connected to a water replenishment assembly, which is connected to one end of the connecting pipe close to the second antifreeze pipe. The water replenishment assembly includes a control valve assembly, a water replenishment pipe and a constant pressure tank. The water replenishment pipe is connected to the connecting pipe, and the constant pressure tank and the control valve assembly are connected in series in sequence on the water replenishment pipe from one end close to the connecting pipe to one end far from the connecting pipe.

4. A cooling water system for vacuum microwave drying equipment according to claim 2, characterized in that: The second water inlet pipe and the second water outlet pipe are both connected in series with a control valve assembly, and the control valve assembly is used to control the opening and closing of the antifreeze assembly.

5. A cooling water system for vacuum microwave drying equipment according to claim 1, characterized in that: A heat exchanger is connected between the cooling tower and the third water tank. The heat exchanger is provided with a third water inlet pipe, a third water outlet pipe, a cold water inlet pipe and a cold water outlet pipe. The third water inlet pipe is connected to the first water tank at one end away from the heat exchanger. A pipeline pump is connected in series to the third water inlet pipe. The third water outlet pipe is connected to a vacuum pump at one end away from the heat exchanger. The vacuum pump is connected to the first water tank at one end away from the third water outlet pipe. A third submersible pump is provided inside the third water tank. The cold water inlet pipe extends into the third water tank at one end away from the heat exchanger. The cold water inlet pipe is connected to the third submersible pump. The cold water outlet pipe is connected to the second water inlet pipe at one end away from the heat exchanger.

6. A cooling water system for vacuum microwave drying equipment according to claim 5, characterized in that: There are multiple vacuum pumps, which are arranged in parallel; there are also multiple pipeline pumps, which are arranged in parallel.

7. A cooling water system for vacuum microwave drying equipment according to claim 1, characterized in that: There are multiple second circulating pumps, and the multiple second circulating pumps are arranged in parallel.

8. A cooling water system for vacuum microwave drying equipment according to claim 1, characterized in that: The air-cooled heat pump assembly includes a first air-cooled heat pump unit and a second air-cooled heat pump unit, the first air-cooled heat pump unit and the second air-cooled heat pump unit are arranged in parallel, and the first air-cooled heat pump unit and the second air-cooled heat pump unit are both connected to the inside of the third water tank.

9. A cooling water system for vacuum microwave drying equipment according to claim 8, characterized in that: The first air-cooled heat pump unit is provided with a fourth water outlet pipe and a fourth water inlet pipe, both of which extend into the third water tank, a first submersible pump is provided inside the third water tank, and the fourth water inlet pipe is connected to the first submersible pump.

10. A cooling water system for vacuum microwave drying equipment according to claim 8, characterized in that: The second air-cooled heat pump unit is provided with a fifth water outlet pipe and a fifth water inlet pipe, both of which extend into the third water tank, a second submersible pump is provided inside the third water tank, and the fifth water inlet pipe is connected to the second submersible pump.

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