A circulating cooling system for nanocrystalline alloy casting

Abstract

The application relates to a circulating cooling system for nano-crystal alloy casting applied to the field of metal pouring and cooling. Through the arrangement of an extended channel plate, the transverse span of the cooling channel can be adaptively adjusted according to the actual cooling condition in the cooling process of the cooling liquid to the nano-crystal alloy casting. Compared with the fixed circulating channel in the prior art, the cooling effect can be greatly improved under the condition of effectively ensuring the utilization rate of the cooling liquid. In addition, the arrangement of the internal temperature monitoring assembly can be matched with the sampling and temperature detection of the cooling liquid in the circulating channel, the heat distribution in the circulating channel can be understood in time, the staff can take corresponding measures according to the heat distribution characteristics, the temperature compensation is conducted on the circulating channel, the temperature difference of the cooling liquid at different positions in the circulating channel is within a certain range, the cooling effect is effectively ensured, and the influence of the too large temperature difference on the nano-crystal alloy finished product is reduced.

Description

Technical Field

[0001] The present invention relates to a circulating cooling system, and more particularly to a circulating cooling system for casting nanocrystalline alloys applied in the field of metal casting cooling. Background Technology

[0002] Nanocrystalline alloys are soft magnetic alloys with nanocrystalline structures obtained through heat treatment of amorphous alloys, exhibiting superior soft magnetic properties. Therefore, the manufacturing and use of amorphous alloy materials will be energy-efficient, making them a key green and energy-saving product for development in the new century.

[0003] Nanocrystalline alloys typically use casting molds with built-in circulating water cooling systems. These systems usually consist of fixed water pipes that circulate water to remove heat from the mold during casting. However, in existing technologies, with fixed water pipes and a fixed flow rate, the contact area between the coolant and the mold is limited. Therefore, the cooling effect can generally only be controlled by adjusting the circulation speed and the initial temperature of the coolant. However, adjusting the speed can lead to either low coolant utilization or excessively low temperatures at the inlet and outlet, resulting in uneven heat distribution and affecting the quality of the finished alloy product. Lowering the initial temperature requires significant investment in a cooling source, and the same speed-related problems persist in practice. Summary of the Invention

[0004] The technical problem that this invention aims to solve in view of the above-mentioned prior art is that the cooling channels of existing circulating cooling systems are fixed, resulting in poor controllability of the cooling effect.

[0005] To address the aforementioned problems, this invention provides a circulating cooling system for casting nanocrystalline alloys, comprising two pairs of circulating channels respectively disposed within a casting punch and a casting die. Each casting punch and casting die has two symmetrical cooling chambers (I), each corresponding to one of the circulating channels. Each circulating channel includes two expansion channel plates, a cooling chamber (II) formed by the two expansion channel plates, and two water pipes respectively fixedly connected to the casting punch or casting die. Temperature sensors are installed at the outer ends of the water pipes, and the ends of both water pipes extend into the cooling chamber (II). Two bidirectional expansion slots symmetrical about the cooling chamber (II) are carved within the expansion channel plates. A limit seal is fixedly connected to the opening of one of the bidirectional expansion slots near the cooling chamber (II). Two electromagnetic plates are installed on the left and right inner walls of each cooling chamber (I), each corresponding to one of the expansion channel plates.

[0006] In the aforementioned circulating cooling system for casting nanocrystalline alloys, by setting up an extended channel plate, the lateral span of the cooling channel can be adaptively adjusted according to the actual cooling situation during the cooling process of the nanocrystalline alloy casting by the coolant. Compared with the fixed circulating channel in the prior art, the cooling effect can be greatly improved while effectively ensuring the utilization rate of the coolant.

[0007] As a further improvement of this application, the height of the first cooling chamber is consistent with the total thickness of the two expansion channel plates, the lateral width of the first cooling chamber is greater than the lateral width of the expansion channel plates, the height of the limiting seal is twice the depth of the bidirectional expansion groove, and the two limiting seals on the two expansion channel plates are symmetrically distributed.

[0008] As a further improvement of this application, the water inlet directions of two horizontally adjacent circulation channels and two vertically adjacent circulation channels are opposite.

[0009] As a further improvement of this application, both electromagnetic plates corresponding to the same expansion channel plate generate magnetic attraction to the expansion channel plate when energized, and the two electromagnetic plates corresponding to the same expansion channel plate are not energized at the same time.

[0010] As another improvement of this application, an internal temperature monitoring component is provided on the limiting seal, and a temperature compensation unit is provided in the expansion channel plate. The temperature compensation unit includes multiple cooling plates distributed along the cooling cavity. The internal temperature monitoring component includes multiple sampling slots that are chiseled in the upper end of the limiting seal and distributed in a linear array. Through the separation of the multiple sampling slots, multiple temperature-sensing teeth are formed on the limiting seal. A temperature-sensing diaphragm is fixedly embedded in the middle of the temperature-sensing teeth. A laser emitter and a laser receiver are respectively installed on the inner walls of the two sampling slots near the two ends of the limiting seal, and the two are respectively installed on the inner walls of the two sampling slots that are far apart from each other.

[0011] As a further improvement to this application, the laser emitter is located near the drain side of the circulation channel, the laser receiver is located near the inlet side of the circulation channel, and the limiting seal is made of transparent material.

[0012] As a further improvement to this application, a fluorescent strip is fixedly embedded inside the upper end of the limiting seal, and the fluorescent strip corresponds to multiple temperature-sensing teeth.

[0013] As a further improvement to this application, the temperature-sensitive septum is prepared by mixing a rigid transparent material and a thermochromic material in a volume ratio of (2-5):1, and the thermochromic critical temperature and the color of the thermochromic material of the multiple temperature-sensitive septums are consistent.

[0014] A circulating cooling system for casting nanocrystalline alloys, the cooling method comprising the following steps: S1. When the nanocrystalline alloy liquid is poured into the mold cavity formed by the casting punch and the casting die, multiple circulation channels are controlled to start circulating the coolant in and out. S2. By comparing the temperature difference between the inlet and outlet sides of the water using two temperature sensors on the same circulation channel, a threshold range is pre-set for the temperature difference between the two temperature sensors. When the temperature difference is greater than the threshold range, the circulation speed of the coolant is increased; when the temperature difference is less than the threshold range, the circulation speed of the coolant is decreased. At the same time, the two expansion channel plates are controlled to be staggered and separated from each other to expand the lateral distribution span of the coolant on the expansion channel plates, accelerate heat absorption, and improve the utilization rate of the coolant. S3. When the temperature difference between the two temperature sensors is still less than the threshold range, first control the two expansion channel plates to be staggered and separated, so that cooling chamber two is connected to cooling chamber one, further expanding the lateral distribution span of the coolant in the expansion channel plates and accelerating heat absorption. In summary, by setting the expansion channel plates, during the cooling process of the coolant casting nanocrystalline alloy, the lateral span of the cooling channel can be adaptively adjusted according to the actual cooling situation. Compared with the fixed circulation channel in the prior art, the cooling effect can be greatly improved while effectively ensuring the utilization rate of the coolant. In addition, with the setting of the internal temperature monitoring component, the coolant in the circulation channel can be sampled and the temperature can be detected. The heat distribution in the circulation channel can be understood in a timely manner, and the staff can take corresponding measures according to its heat distribution characteristics to compensate for the temperature in the circulation channel, so that the temperature difference of the coolant at different positions in the circulation channel is within a certain range, thereby effectively ensuring the cooling effect and reducing the impact of excessive temperature difference on the finished nanocrystalline alloy. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of a casting mold with a circulation channel according to the first embodiment of this application; Figure 2 This is a cross-sectional schematic diagram of a casting mold with a circulation channel according to the first embodiment of this application; Figure 3 This is a schematic diagram illustrating the circulating cooling of the casting mold by the coolant in the circulating channel in the first embodiment of this application; Figure 4 This is an exploded perspective view of the circulation channel according to the first embodiment of this application; Figure 5 This is a perspective view of the extended channel plate according to the first embodiment of this application; Figure 6 This is a schematic diagram of a cross-section of the circulation channel portion according to the first embodiment of this application; Figure 7 This is a schematic diagram of the two expansion channel plates after they have been moved back-to-back in the first embodiment of this application; Figure 8 This is a schematic diagram of the two extended channel plates after they have been moved and misaligned towards each other according to the first embodiment of this application. Figure 9 This is a perspective view of the extended channel plate according to the second embodiment of this application; Figure 10 This is a perspective view of the limiting seal according to the second embodiment of this application.

[0016] The following are the labels in the diagram: 1 Water pipe, 2 Expansion channel plate, 201 Cooling chamber two, 3 Cooling chamber one, 4 Limiting seal, 401 Bidirectional expansion slot, 5 Electromagnetic plate, 41 Sampling slot, 42 Temperature sensing diaphragm, 43 Laser emitter, 44 Laser receiver, 6 Temperature sensor. Detailed Implementation

[0017] The three embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0018] First implementation method: Figure 1-2 As shown in the figure, a represents a casting punch and b represents a casting die. A circulating cooling system for casting nanocrystalline alloys includes two pairs of circulating channels respectively disposed in the casting punch and the casting die. Two mutually symmetrical cooling chambers 3 are carved in both the casting punch and the casting die. The two cooling chambers 3 correspond to the two circulating channels respectively. The circulating channels include two expansion channel plates 2, a cooling chamber 201 surrounded by the two expansion channel plates 2, and two water pipes 1 respectively fixedly connected to the casting punch or the casting die.

[0019] like Figure 3 Temperature sensors 6 are installed at the outer ends of water pipe 1, such as Figure 4-5 The ends of both water pipes 1 extend into the second cooling chamber 201. Two bidirectional expansion slots 401, symmetrical about the second cooling chamber 201, are carved in the expansion channel plate 2. One of the bidirectional expansion slots 401 is fixedly connected to a limit seal 4 near the opening of the second cooling chamber 201. Two electromagnetic plates 5 are installed on the left and right inner walls of the first cooling chamber 3. The two electromagnetic plates 5 correspond to the two expansion channel plates 2 respectively. The height of the first cooling chamber 3 is consistent with the total thickness of the two expansion channel plates 2. The lateral width of the first cooling chamber 3 is greater than the lateral width of the expansion channel plate 2, so that the position of the expansion channel plate 2 in the first cooling chamber 3 is not fixed and can move left and right. This increases the lateral cross-sectional span for effective cooling, which facilitates faster cooling, improves the utilization rate of coolant, and enhances the cooling effect.

[0020] It is worth noting that the part of the water pipe 1 that is fixed to the casting punch or casting die is made of rigid material, while the part that extends into the cooling chamber 201 is elastic. Furthermore, the elastic part of the water pipe 1 is fixed to the inner wall of the cooling chamber 201, which effectively ensures that the end of the water pipe 1 can undergo adaptive deformation when the two expansion channel plates 2 move.

[0021] The height of the limiting seal 4 is twice the depth of the bidirectional expansion slot 401, and the two limiting seals 4 on the two expansion channel plates 2 are symmetrically distributed, such as... Figure 6 When the cooling chambers 201 on the two expansion channel plates 2 correspond to each other, the limiting seal 4 can block the openings of the two opposing bidirectional expansion slots 401, so that during the circulating cooling process, the coolant can only pass through the cooling chambers 201 with a circular cross-section.

[0022] The water inlet directions of two horizontally adjacent circulation channels and two vertically adjacent circulation channels are opposite. By using opposite water inlet and drainage directions, the temperature difference between the water inlet and drainage ends can be alleviated to a certain extent, making it less likely for the heat distribution on the casting mold to have a large temperature difference.

[0023] When the two electromagnetic plates 5 corresponding to the same expansion channel plate 2 are energized, they both generate a magnetic attraction force on the expansion channel plate 2. The two electromagnetic plates 5 corresponding to the same expansion channel plate 2 are not energized at the same time, so that when the electromagnetic plates 5 on both sides are energized separately, they can control the expansion channel plate 2 to move under the action of magnetic attraction force, and at the same time control the expansion channel plate 2 to move in different directions. After each cooling operation is completed, the two electromagnetic plates 5 in the vertical direction can be controlled to be energized synchronously, so that the two expansion channel plates 2 move towards the same side and come into contact with the inner wall of the cooling chamber 3, so that the ends of the two expansion channel plates 2 are aligned. Then the power is turned off. At this time, under the action of the elastic part of the water pipe 1 to recover its deformation, it can move towards the middle to correct its position, so that when each cooling starts, the two expansion channel plates 2 are opposite each other and as close to the middle as possible.

[0024] A circulating cooling system for casting nanocrystalline alloys, the cooling method comprising the following steps: S1. When the nanocrystalline alloy liquid is poured into the mold cavity formed by the casting punch and the casting die, multiple circulation channels are controlled to start circulating the coolant in and out. S2. By comparing the temperature difference between the inlet and outlet sides using two temperature sensors 6 on the same circulation channel, a threshold range is pre-set for the temperature difference between the two temperature sensors 6. When the temperature difference exceeds the threshold range, it indicates that the coolant has absorbed too much heat. The circulation speed of the coolant can be increased to reduce the temperature difference. Figure 7When the temperature difference is less than the threshold range, it means that the coolant absorbs less heat and is discharged, resulting in low utilization. At this time, the circulation speed of the coolant can be slowed down, and the two expansion channel plates 2 can be controlled to be staggered and separated from each other to expand the lateral distribution span of the coolant in the expansion channel plates 2, accelerate heat absorption, and improve the utilization rate of the coolant. S3, such as Figure 8 When the temperature difference between the two temperature sensors 6 is still less than the threshold range, the two expansion channel plates 2 are first controlled to be staggered and separated from each other, so that the second cooling chamber 201 is connected to the first cooling chamber 3, further expanding the lateral distribution span of the coolant in the expansion channel plate 2, accelerating heat absorption, increasing the heat absorption area of ​​the coolant, and thus improving the cooling efficiency.

[0025] It is worth noting that the aforementioned "reverse misalignment separation" and "opposite misalignment separation" are based on the movement of the two limiting seals 4.

[0026] In the above-mentioned circulating cooling system for casting nanocrystalline alloys, by setting the extended channel plate 2, the lateral span of the cooling channel can be adaptively adjusted according to the actual cooling situation during the cooling process of the coolant casting nanocrystalline alloys. Compared with the fixed circulating channel in the prior art, the cooling effect can be greatly improved, and the cooling efficiency of the coolant can be effectively improved.

[0027] Second implementation method: This embodiment adds an internal temperature monitoring component to the first embodiment, while the rest remains the same as the first embodiment.

[0028] Figure 9-10 As shown, an internal temperature monitoring component is provided on the limiting seal 4, and a temperature compensation unit is provided in the expansion channel plate 2. The temperature compensation unit includes multiple cooling plates distributed along the cooling cavity 201. The internal temperature monitoring component includes multiple sampling slots 41 drilled into the upper end of the limiting seal 4 and arranged in a linear array. Through the separation of the multiple sampling slots 41, multiple temperature-sensing teeth are formed on the limiting seal 4. A temperature-sensing septum 42 is fixedly embedded in the middle of the temperature-sensing teeth. A laser emitter 43 and a laser receiver 44 are respectively installed on the inner walls of the two sampling slots 41 near the two ends of the limiting seal 4. Installed on the inner walls of the two sampling tanks 41 that are far apart from each other, in this embodiment, when the two temperature sensors 6 detect that the temperature difference between the inlet and outlet water is too large, on the one hand, the flow rate of the coolant in the circulation channel can be accelerated, thereby reducing the temperature difference between the inlet and outlet water sides of the circulation channel. At the same time, a temperature compensation unit can be used to perform low temperature compensation on the outlet side, further reducing the temperature difference, effectively ensuring that the temperature difference on both sides of the circulation channel is small and within the threshold range, so that the cooling effect of the nanocrystalline alloy casting is more uniform and better, and it is less likely to affect the quality of the finished product due to the cooling temperature difference.

[0029] It is worth noting that, among the two expansion channel plates 2 in the same cooling chamber 3, only the expansion channel plate 2 on the side away from the mold cavity is equipped with a temperature compensation unit, and the cooling end of the cooling chip in the temperature compensation unit faces the mold cavity side.

[0030] The laser emitter 43 is located near the drainage side of the circulation channel, the laser receiver 44 is located near the water inlet side of the circulation channel, the limiting seal 4 is made of transparent material, and the temperature-sensitive septum 42 is prepared by mixing hard transparent material and thermochromic material in a volume ratio of (2-5):1. The thermochromic critical temperature and the color of the thermochromic material of the multiple temperature-sensitive septums 42 are consistent.

[0031] Thermochromic materials are generally colorless above the critical temperature, and their color becomes lighter and lighter as they approach the critical temperature below it. Under this property, when the initial casting mold is not used, the multiple temperature-sensitive diaphragms 42 are in the darkest color state, and their light transmittance is the worst. This results in the laser signal data received by the laser receiver 44 being the smallest. At this time, the temperature in the circulation channel tends to be consistent, and the data on the laser receiver 44 can be used as a reference.

[0032] The higher the temperature, the greater the laser signal data on the laser receiver 44. This indicates that the temperature of the casting mold is relatively high when producing nanocrystalline alloys. Under the cooling effect of the circulation channel, the temperature of the casting mold is reduced. When the temperature difference between its two ends is greater, the color of the temperature-sensing septum 42 at the high temperature is lighter, and the light transmittance is stronger, making the light signal that the laser receiver 44 can receive stronger. Therefore, the greater the temperature difference between the two ends of the circulation channel, the greater the signal data acquired by the laser receiver 44, and the greater the difference between it and the reference data. Based on the changes in the data, the heat distribution in the circulation channel can be effectively judged, which facilitates low-temperature compensation on the drainage side according to the temperature compensation unit, making the heat distribution in the circulation channel more uniform and the cooling effect better.

[0033] By extending the channel plate 2, the lateral span of the cooling channel can be adaptively adjusted according to the actual cooling situation during the cooling process of the nanocrystalline alloy casting. Compared with the fixed circulation channel in the prior art, the cooling effect can be greatly improved, and the cooling efficiency of the coolant can be effectively improved. In addition, with the setting of the internal temperature monitoring component, the coolant in the circulation channel can be sampled and the temperature can be detected. The heat distribution in the circulation channel can be understood in a timely manner, and the staff can take corresponding measures according to the heat distribution characteristics to compensate for the temperature in the circulation channel, so that the temperature difference of the coolant at different positions in the circulation channel is within a certain range, thereby effectively ensuring the cooling effect and reducing the impact of excessive temperature difference on the finished nanocrystalline alloy.

[0034] The third implementation method: This embodiment differs from the first embodiment in that it changes the way the internal temperature monitoring component is set, while the rest remains the same as the first embodiment.

[0035] In this embodiment, instead of a laser emitter 43 and a laser receiver 44, temperature sensors or color sensors can be installed in multiple sampling slots 41 to monitor the temperature at multiple sampling slots 41. The temperature data from multiple points can form the heat distribution within the circulation channel. Compared to the second embodiment, this method provides more accurate and clear monitoring of local temperature data and changes, allowing staff to perform low-temperature compensation on the side near the outlet of the circulation channel based on the heat distribution. The specific low-temperature compensation can be achieved through a cooling element or other methods. Low-temperature compensation can maintain the temperature difference between the two sides of the circulation channel within a certain range, preventing excessive temperature differences and effectively ensuring relatively uniform cooling of the nanocrystalline alloy casting mold, thus minimizing the impact on the finished nanocrystalline alloy product inside.

[0036] When a temperature sensor is directly selected, the limiting seal 4 can directly detect the temperature at each sampling slot 41. In this case, there is no need to set up a temperature sensing diaphragm 42. This method is cheaper, but has poor compatibility with the first implementation method.

[0037] When a color sensor is selected, a fluorescent strip is fixedly embedded inside the upper end of the limiting seal 4. The fluorescent strip corresponds to multiple temperature-sensing teeth. The fluorescent strip mainly serves as a light source, enabling the color sensor to capture the color change of the temperature-sensing partition 42 in the circulation channel due to temperature. This effectively ensures more accurate acquisition of local temperature data in the circulation channel. This implementation method is highly compatible with the first implementation method. It only requires removing the laser emitter 43 and laser receiver 44 and then adding a color sensor. The temperature-sensing partition 42 can also be utilized. Considering current practical needs, the above-mentioned implementation method adopted in this application is not limited to this. Various changes made within the scope of knowledge possessed by those skilled in the art without departing from the concept of this application still fall within the protection scope of this invention.

Claims

1. A circulating cooling system for casting nanocrystalline alloys, characterized in that: It includes two pairs of circulation channels respectively set in the casting punch and casting die. Each casting punch and casting die has two mutually symmetrical cooling chambers (3). The two cooling chambers (3) correspond to the two circulation channels respectively. The circulation channels include two expansion channel plates (2), a cooling chamber (201) formed by the two expansion channel plates (2), and two water pipes (1) respectively fixedly connected to the casting punch or casting die. Temperature sensors (6) are installed at the outer ends of the water pipes (1). The ends of the two water pipes (1) extend into the cooling chamber (201). Two bidirectional expansion slots (401) symmetrical about the cooling chamber (201) are carved in the expansion channel plate (2). One of the bidirectional expansion slots (401) is fixedly connected to the opening of the cooling chamber (201) near the opening of the cooling chamber (201). Two electromagnetic plates (5) are installed on the left and right inner walls of the cooling chamber (3). The two electromagnetic plates (5) correspond to the two expansion channel plates (2) respectively.

2. The circulating cooling system for casting nanocrystalline alloys according to claim 1, characterized in that: The height of the first cooling chamber (3) is consistent with the total thickness of the two expansion channel plates (2). The lateral width of the first cooling chamber (3) is greater than the lateral width of the expansion channel plate (2). The height of the limiting seal (4) is twice the depth of the bidirectional expansion groove (401), and the two limiting seals (4) on the two expansion channel plates (2) are symmetrically distributed.

3. The circulating cooling system for casting nanocrystalline alloys according to claim 1, characterized in that: The water inflow directions of two horizontally adjacent circulation channels and two vertically adjacent circulation channels are opposite.

4. The circulating cooling system for casting nanocrystalline alloys according to claim 1, characterized in that: When the two electromagnetic plates (5) corresponding to the same expansion channel plate (2) are energized, they both generate magnetic attraction force on the expansion channel plate (2), and the two electromagnetic plates (5) corresponding to the same expansion channel plate (2) are not energized at the same time.

5. The circulating cooling system for casting nanocrystalline alloys according to claim 1, characterized in that: An internal temperature monitoring component is provided on the limiting seal (4), and a temperature compensation unit is provided in the expansion channel plate (2). The temperature compensation unit includes multiple cooling plates distributed along the second cooling cavity (201). The internal temperature monitoring component includes multiple sampling slots (41) that are chiseled at the upper end of the limiting seal (4) and distributed in a linear array. Through the separation of the multiple sampling slots (41), multiple temperature-sensing teeth are formed on the limiting seal (4). A temperature-sensing diaphragm (42) is fixedly embedded in the middle of the temperature-sensing teeth. A laser emitter (43) and a laser receiver (44) are respectively installed on the inner walls of the two sampling slots (41) near the two ends of the limiting seal (4), and the two are respectively installed on the inner walls of the two sampling slots (41) that are far apart from each other.

6. The circulating cooling system for casting nanocrystalline alloys according to claim 5, characterized in that: The laser emitter (43) is located near the drain side of the circulation channel, the laser receiver (44) is located near the inlet side of the circulation channel, and the limiting seal (4) is made of transparent material.

7. The circulating cooling system for casting nanocrystalline alloys according to claim 6, characterized in that: A fluorescent strip is fixedly embedded inside the upper end of the limiting seal (4), and the fluorescent strip corresponds to multiple temperature-sensing teeth.

8. A circulating cooling system for casting nanocrystalline alloys according to claim 7, characterized in that: The temperature-sensitive septum (42) is prepared by mixing a rigid transparent material and a thermochromic material in a volume ratio of (2-5):1, and the thermochromic critical temperature and the color of the thermochromic material of the multiple temperature-sensitive septums (42) are consistent.

9. A circulating cooling system for casting nanocrystalline alloys according to claim 8, characterized in that: Its cooling method includes the following steps: S1. When the nanocrystalline alloy liquid is poured into the mold cavity formed by the casting punch and the casting die, multiple circulation channels are controlled to start circulating the coolant in and out. S2. By comparing the temperature difference between the inlet and outlet sides of the water by two temperature sensors (6) on the same circulation channel, a threshold range is set in advance for the temperature difference between the two temperature sensors (6). When the temperature difference is greater than the threshold range, the circulation speed of the coolant is accelerated. When the temperature difference is less than the threshold range, the circulation speed of the coolant is slowed down. At the same time, the two expansion channel plates (2) are controlled to be staggered and separated from each other to expand the lateral distribution span of the coolant in the expansion channel plate (2), accelerate heat absorption and improve the utilization rate of the coolant. S3. When the temperature difference between the two temperature sensors (6) is still less than the threshold range, first control the two expansion channel plates (2) to be staggered and separated from each other, so that the second cooling chamber (201) is connected to the first cooling chamber (3), further expanding the lateral distribution span of the coolant in the expansion channel plate (2) and accelerating heat absorption.

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