Vacuum air cooler

Abstract

The utility model relates to the technical field of air coolers, and discloses a vacuum air cooler which comprises an air cooler assembly composed of a fan and a heat exchanger, an air inlet of the heat exchanger is connected to an air inlet pipe, an air outlet of the heat exchanger is connected to an air inlet of the fan, an air outlet of the fan is connected to an air outlet pipe, and a cooling circulating water pipe is arranged in the heat exchanger. The cooling circulating water pipe is connected to a cold water source, the air inlet pipe and the air outlet pipe are connected to the cooling equipment space, the cooling equipment space, the air inlet pipe, the draught fan, the heat exchanger and the air outlet pipe form a closed space, the sealing performance of the closed space is that the vacuum pressure of the closed space is smaller than 50 pa, and the closed space is vacuumized and then filled with inert gas. According to the utility model, rapid cooling of high-temperature gas is realized, and a low-oxygen environment is kept when the lithium battery is cooled.

Description

Technical Field

[0001] The utility model relates to the technical field of air coolers, in particular to a vacuum air cooler. Background Art

[0002] An air cooler is a device used for rapid cooling in the lithium battery production process. During the lithium battery production process, the battery must be dried at high temperature, and then cooled quickly after drying.

[0003] Existing air coolers mostly use air circulation to cool the batteries. The principle is to use a circulating fan to generate forced circulating air through the ventilation duct, and set a condenser on the ventilation duct to cool the circulating air to produce lower temperature circulating air. This circulating air blows towards the high temperature lithium batteries, causing them to cool down quickly, thereby achieving the function of increasing production speed.

[0004] Since lithium battery pole coils require heat treatment processing in a low-oxygen environment, the circulating air of existing air coolers is air, which cannot meet the process requirements. Utility Model Content

[0005] The purpose of the utility model is to solve the above problems and provide a vacuum cooling fan to achieve rapid cooling of high-temperature gas and maintain a low-oxygen environment when the lithium battery is cooled.

[0006] The technical solution adopted by this utility model is:

[0007] A vacuum air cooler, characterized in that it includes an air cooler assembly consisting of a fan and a heat exchanger, the air inlet of the heat exchanger is connected to the air inlet pipe, the air outlet of the heat exchanger is connected to the air inlet of the fan, and the air outlet of the fan is connected to the air outlet pipe. A cooling circulating water pipe is arranged in the heat exchanger, the cooling circulating water pipe is connected to a cold water source, the air inlet pipe and the air outlet pipe are respectively connected to a cooling equipment space, the cooling equipment space, the air inlet pipe, the fan, the heat exchanger, and the air outlet pipe form a closed space, the sealing performance of the closed space is that its vacuum pressure is less than 50pa, and the closed space is filled with inert gas after being evacuated.

[0008] Furthermore, the connections between the fan, the heat exchanger and the air inlet pipe, the air outlet pipe, and the air inlet pipe and the air outlet pipe themselves are all vacuum flange connections.

[0009] Furthermore, the air inlet pipe, fan, heat exchanger, and air outlet pipe are all made of stainless steel, and the connections between them or between them are vacuum flange connections and magnetic fluid sealing connections.

[0010] Furthermore, the gas in the enclosed space can withstand high temperatures up to 200°C.

[0011] Furthermore, the fan is driven by a motor, and the motor is connected to the fan blade cavity in a magnetic fluid sealed connection. The magnetic fluid connector is provided with a cooling cavity, and the cooling cavity is connected to the cooling circulation water pipe through a water distribution pipe.

[0012] Furthermore, the air cooler assembly is installed in the shell, the inlet and outlet pipes of the cooling circulation water pipe are connected from the lower side of the shell, and the air inlet pipe and the air outlet pipe extend from the top of the shell.

[0013] Furthermore, there are multiple air cooler assemblies installed in the shell, each air cooler assembly has a pair of air inlet pipes and air outlet pipes extending above the shell, and multiple air cooler assemblies share a set of water inlet and outlet pipes.

[0014] Furthermore, the inert gas is nitrogen, and the cooling equipment space is a lithium battery drying equipment.

[0015] Furthermore, the cold water source is factory pipeline chilled water, or a refrigerant cold source.

[0016] Furthermore, a temperature sensor and a pressure sensor are provided in the enclosed space, and the control system of the vacuum cooling fan feeds back the information measured by the sensors.

[0017] The beneficial effects of the utility model are:

[0018] (1) The gas pipeline connected by the vacuum flange realizes vacuum pumping and adding high-pressure inert gas to ensure that the production process of lithium batteries is carried out in a low-oxygen environment;

[0019] (2) Magnetic fluid connection ensures the sealing performance of the fan;

[0020] (3) The fan's drive motor is not affected by high-temperature gas;

[0021] (4) It can be used in various production processes of materials that require a low oxygen environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Attachment Figure 1 This is a schematic diagram of the exterior structure of the utility model;

[0023] Attachment Figure 2 This is a schematic diagram of the internal structure without the front side panel;

[0024] Attachment Figure 3 This is a partial enlarged view of the location of the fan and heat exchanger;

[0025] Attachment Figure 4 It is a cross-sectional schematic diagram of the fan and heat exchanger.

[0026] The reference numerals in the accompanying drawings are:

[0027] 1. Shell; 2. Ventilation duct;

[0028] 3. Support frame; 4. Electric control box;

[0029] 5. Universal wheel; 6. Fan;

[0030] 7. Heat exchanger; 8. Motor;

[0031] 9. Air inlet pipe; 10. Air outlet pipe;

[0032] 11. Cooling circulating water pipe; 12. Water inlet pipe;

[0033] 13. Water outlet pipe; 14. Vacuum flange;

[0034] 15. Magnetic fluid connector; 16. Water distribution pipe. DETAILED DESCRIPTION

[0035] The specific implementation of the vacuum cooling fan of the present invention is described in detail below with reference to the accompanying drawings.

[0036] See attached Figure 1 The vacuum air cooler is installed in a shell 1. The shell 1 is in the shape of a rectangular parallelepiped, with ventilation channels 2 on the top and sides. A support frame 3 is set inside, and an electric control box 4 is set on the top for controlling the vacuum air cooler. A universal wheel 5 is set at the bottom of the shell 1 for moving the air cooler when it is working.

[0037] See attached Figure 2 、 4 A cooling fan assembly consisting of a fan 6 and a heat exchanger 7 is installed in the housing 1. The fan 6 is driven by a drive motor 8. The motor 8 and the fan 6 are fixed to the support frame 3.

[0038] The air inlet of heat exchanger 7 is connected to air inlet duct 9, while the air outlet of heat exchanger 7 is connected to the air inlet of fan 6. The air outlet of fan 6 is connected to air outlet duct 10. These two ducts, arranged along a curve, extend from the top of housing 1 to connect to the cooling equipment space. Both ducts, 9 and 10, are secured to support frame 3 within housing 1 via fasteners. In the lithium battery manufacturing industry, the cooling equipment space is used for drying lithium batteries.

[0039] A cooling circulating water pipe 11 is provided in the heat exchanger 7, and the cooling circulating water pipe 11 is connected to a cold water source. The air outlet of the heat exchanger 7 is connected to the air inlet of the fan 6. Gas enters from the air inlet of the heat exchanger 7 and exchanges heat with the cold water in the cooling circulating water pipe 11, thereby lowering the temperature of the gas. The cold water source uses the factory's pipeline chilled water. The water inlet pipe 12 and the water outlet pipe 13 are installed at the lower side of the shell 1 and fixed to the support frame 3 by fasteners. Flanges are installed at the ends of the inlet and outlet pipes 12 and 13 for connection to the pipeline chilled water. In places where pipeline chilled water is not available, the refrigerant in the existing technology can be used to produce cooling water, or normal temperature water can be used directly.

[0040] The air inlet pipe 9 and the air outlet pipe 10 are respectively connected to the cooling equipment space. The cooling equipment space, the air inlet pipe 9, the fan 6, the heat exchanger 7, and the air outlet pipe 10 form a closed space. The sealing performance of the closed space is that its vacuum pressure is less than 50pa. The closed space is evacuated and filled with inert gas.

[0041] To achieve vacuum performance throughout the sealed space and meet the 200°C high temperature requirement for the heat exchanged gas, the connections between the fan 6, heat exchanger 7, air inlet pipe 9, and air outlet pipe 10 are all connected using vacuum flanges 14 and magnetic fluid seals. The joints between the air inlet pipe 9 and the air outlet pipe 10 are also connected using vacuum flanges 14. The fan 6, heat exchanger 7, air inlet pipe 9, and air outlet pipe 10 are all made of stainless steel, and the components themselves are installed and connected using magnetic fluid connections. For example, the fan blade cavity of the fan 6 is also connected using magnetic fluid seals to ensure sealing performance under high temperature conditions.

[0042] See attached Figure 3 The motor shaft of motor 8 is connected to the rotating shaft of fan 6 via a flange. The outside of the motor shaft is sealed to the fan blade cavity of fan 6 via a magnetic sulfur connector 15. Due to the high temperature of fan 6, heat is transferred to motor 8 through the flange, causing motor 8 to heat up and affect its normal operation. A cooling chamber is provided outside magnetic sulfur connector 15 and is connected to the inlet and outlet water pipes 12 and 13 via a water distribution pipe 16.

[0043] See the attached Figure 1 Depending on the cooling requirements of lithium batteries, vacuum air coolers can be configured as multi-component structures. For example, the two sets of air cooler components shown in the figure are stacked one on top of the other, supported by a support frame 3 within the housing 1 to ensure vibration and weight support during operation. The air inlet duct 9 and air outlet duct 10 of both components are bent and deformed inside the housing 1 before extending from the top of the housing 1. These components can be connected to two sets of lithium battery drying equipment, or simultaneously to one set of lithium battery drying equipment, to increase air volume and speed up cooling. The two air cooler components can share a set of inlet and outlet water pipes 12 and 13, configured using tees and other fittings.

[0044] The control system of the electric control box 4 is responsible for the electrical control of the equipment. The drive motor 8 of the fan 6 adopts a variable frequency motor 8, and its normal operation is controlled by the control system. In addition, temperature sensors are installed in the air inlet duct 9 and the air outlet duct 10. The control system receives information from the temperature sensors and feeds it back to the user.

[0045] The vacuum air cooler of this patent rapidly cools lithium battery drying equipment. The specific operating process is as follows: Connect the air inlet pipe 9 and air outlet pipe 10 to the lithium battery drying equipment, and connect the water inlet and outlet pipes 12 and 13 to the factory's chilled water supply. Evacuate the sealed space formed by the lithium battery drying equipment, air inlet pipe 9, heat exchanger 7, fan 6, and air outlet pipe 10 to a vacuum pressure of less than 50 Pa, then fill it with nitrogen or another inert gas to a constant pressure. Start fan 6 and turn on the chilled water supply. Cool air from the air outlet pipe 10 is fed into the lithium battery drying equipment, exchanging heat with the material inside the equipment to form hot air. The hot air enters through the air inlet of heat exchanger 7, exchanges heat with the cooling circulating water pipe 11 within the heat exchanger 7, and forms cold air that is fed to the air inlet of fan 6. From the air outlet of fan 6, it is discharged to the air outlet pipe 10, and the cycle repeats. Because the sealed space in the air duct is resistant to high temperatures and high pressures, the material can be quickly cooled after drying. The control system provides feedback to the user based on the information from the temperature sensor and pressure sensor so that the user can take necessary measures to make the system run more stably.

[0046] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A vacuum cooling fan, characterized in that: The air cooler assembly includes a fan and a heat exchanger, the air inlet of the heat exchanger is connected to the air inlet pipe, the air outlet of the heat exchanger is connected to the air inlet of the fan, and the air outlet of the fan is connected to the air outlet pipe. A cooling circulation water pipe is arranged in the heat exchanger, and the cooling circulation water pipe is connected to a cold water source. The air inlet pipe and the air outlet pipe are respectively connected to the cooling equipment space. The cooling equipment space, the air inlet pipe, the fan, the heat exchanger, and the air outlet pipe form a closed space. The sealing performance of the closed space is that its vacuum pressure is less than 50pa, and the closed space is evacuated and filled with inert gas.

2. The vacuum cooling fan according to claim 1, characterized in that: The connections between the fan, the heat exchanger and the air inlet pipe, the air outlet pipe, and the air inlet pipe and the air outlet pipe themselves are all vacuum flange connections.

3. The vacuum cooling fan according to claim 2, characterized in that: The air inlet pipe, fan, heat exchanger and air outlet pipe are all made of stainless steel, and the connections between them or between them are vacuum flange connections and magnetic fluid sealing connections.

4. The vacuum cooling fan according to claim 2, characterized in that: The gas in the enclosed space can withstand high temperatures up to 200°C.

5. The vacuum cooling fan according to claim 1, characterized in that: The fan is driven by a motor, and the motor and the fan blade cavity are sealed by a magnetic fluid connector. A cooling cavity is set in the magnetic fluid connector, and the cooling cavity is connected to the cooling circulation water pipe through a water distribution pipe.

6. The vacuum cooling fan according to any one of claims 1 to 5, characterized in that: The air cooler assembly is installed in the shell, the inlet and outlet pipes of the cooling circulation water pipe are connected from the lower side of the shell, and the air inlet pipe and the air outlet pipe extend from the top of the shell.

7. The vacuum cooling fan according to claim 6, characterized in that: There are multiple air cooler assemblies installed in the shell, each of which has a pair of air inlet pipes and air outlet pipes extending above the shell, and multiple air cooler assemblies share a set of water inlet and outlet pipes.

8. The vacuum cooling fan according to any one of claims 1 to 5, characterized in that: The inert gas is nitrogen, and the cooling equipment space is a lithium battery drying equipment.

9. The vacuum cooling fan according to any one of claims 1 to 5, characterized in that: The cold water source is factory pipeline chilled water or a refrigerant cold source.

10. The vacuum cooling fan according to any one of claims 1 to 5, characterized in that: A temperature sensor and a pressure sensor are arranged in the enclosed space, and the control system of the vacuum cooling fan feeds back the information measured by the sensors.

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