Integrated whole machine internal circulation isolation cooling system

Abstract

The present invention discloses an integrated whole machine internal circulation isolation heat dissipation system, including: a heat dissipation box; an air circulation duct; a phase change material; a phase change material circulation duct; an exhaust fan; the heat dissipation box has a first connection part, a second connection part, a third connection part, and a fourth connection part; the first air inlet of the air circulation duct is connected to the first connection part, and the air circulation duct extends from the first connection part into the heat dissipation box, and the first air outlet is connected to the second connection part; the exhaust fan is located outside the heat dissipation box, and the air inlet end of the exhaust fan is connected to the first air outlet; the second air inlet of the phase change material circulation duct is connected to the third connection part, and the second air outlet is connected to the fourth connection part, and the phase change material circulation duct is arranged outside the heat dissipation box; the phase change material is arranged inside the heat dissipation box. The system can complete the air cooling and temperature reduction inside the charging pile without inhaling external air, thereby avoiding the situation where dust and corrosive substances in the external air enter the charging pile.

Description

Technical Field

[0001] The invention relates to the technical field of heat dissipation of electrical equipment, in particular to an integrated whole-machine internal circulation isolation heat dissipation system. Background Art

[0002] Compared with other electrical equipment, the system heat dissipation of charging piles is relatively large, and the system thermal design requirements are extremely strict. The current power range of DC fast charging piles is 30KW-60KW and 120KW, and the efficiency is generally around 95%, so 5% of it is converted into heat loss, and the heat loss will be 1.5KW, 3KW and 6KW. For outdoor equipment, this heat must be discharged outside the equipment, otherwise it will accelerate the aging of the equipment. At the same time, it is necessary to do a good job of waterproofing and dustproofing to prevent short circuits and signal disorders in electronic equipment. There are currently four commonly used cooling modes: natural cooling (mainly relying on heat sinks), forced air cooling, water cooling, and air conditioning cooling. Due to the influence of factors such as volume, cost, and reliability, most of the heat dissipation methods currently use forced air cooling for external treatment. However, this will cause dust, corrosive gases, and moisture to enter the charging pile, accelerate the aging of the equipment, and even cause corrosion to the equipment, creating safety hazards. Summary of the invention

[0003] In order to solve the above-mentioned prior art problems, the present invention provides an integrated whole machine internal circulation isolation heat dissipation system

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] The integrated whole machine internal circulation isolation heat dissipation system is characterized by comprising:

[0006] Radiator box;

[0007] Air circulation ducts;

[0008] Phase change materials;

[0009] Phase change material flow pipeline;

[0010] Exhaust fan;

[0011] The heat dissipation box has a first connection part, a second connection part, a third connection part, and a third connection part;

[0012] The air circulation duct has a first air inlet and a first air outlet;

[0013] The air inlet is connected to the first connection portion, and the air circulation duct extends from the first connection portion into the interior of the heat dissipation box, and the first air outlet is connected to the second connection portion;

[0014] The exhaust fan is located outside the heat dissipation box, and the air inlet end of the exhaust fan is connected to the first air outlet;

[0015] The phase change material flow channel has a second air inlet and a second air outlet;

[0016] The second air inlet is connected to the third connection portion, the second air outlet is connected to the fourth connection portion, and the phase change material flow pipe is arranged outside the heat dissipation box;

[0017] The phase change material is arranged inside the heat dissipation box.

[0018] Preferably, the integrated whole machine internal circulation isolation heat dissipation system is characterized by comprising:

[0019] Thermal conductive sheet;

[0020] Thermal conductive ring;

[0021] The phase change material flow conduit has a first bending section;

[0022] The first bending section is in a spiral shape and is arranged closely against the inner wall of the heat conducting ring;

[0023] The heat conducting sheet is connected to the outer wall of the heat conducting ring.

[0024] Preferably, the integrated whole machine internal circulation isolation heat dissipation system is characterized by comprising:

[0025] A cooling fan with an air outlet;

[0026] The air outlet of the heat dissipation fan is aligned with the heat conductive ring and the heat conductive sheet.

[0027] Preferably, the integrated whole machine internal circulation isolation heat dissipation system is characterized by:

[0028] The third connection portion is disposed above the heat dissipation box and is in the shape of a trumpet that is smaller at the top and larger at the bottom.

[0029] Preferably, the integrated whole machine internal circulation isolation heat dissipation system is characterized by:

[0030] The second air outlet extends from the fourth connecting portion into the phase change material.

[0031] Preferably, the integrated whole machine internal circulation isolation heat dissipation system is characterized by further comprising:

[0032] Water spraying device;

[0033] The water spray device is arranged in the heat dissipation box;

[0034] The water spray device can absorb the phase change material and atomize the phase change material and spray it into the air circulation duct;

[0035] The phase change material is in liquid state at room temperature.

[0036] Preferably, the water spray device is arranged below the air circulation duct.

[0037] Preferably, the air circulation duct has a second bending section;

[0038] The second bending section comprises:

[0039] Multiple straight pipe sections;

[0040] Multi-section elbows;

[0041] The multiple sections of straight pipes are arranged in parallel, the bent pipe is connected to two adjacent straight pipes, and the adjacent bent pipes are respectively located at opposite ends of the straight pipes.

[0042] Preferably, the integrated whole machine internal circulation isolation heat dissipation system is characterized by further comprising:

[0043] Heat transfer box;

[0044] The heat conduction box is arranged in the heat dissipation box;

[0045] The heat conduction box has an internal cavity, a first through hole, and a second through hole;

[0046] The air circulation duct passes through the first through hole into the internal cavity and passes through the second through hole;

[0047] The bent section of the air circulation duct is arranged in the inner cavity of the heat conduction box and is closely attached to the surface of the inner cavity.

[0048] Preferably, the bottom of the heat conduction box is a honeycomb structure.

[0049] The beneficial effects of the present invention are embodied in:

[0050] The integrated whole-machine internal circulation isolation heat dissipation system provided by the present invention has excellent heat dissipation effect and can solve the heat dissipation problem during the use of fast charging piles and super charging piles currently on the market. At the same time, it completes the cooling of the air inside the charging pile without inhaling external air, thus avoiding the situation in which dust and corrosive substances in the external air enter the interior of the charging pile in the traditional heat dissipation method. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 It is a three-dimensional schematic diagram of the integrated whole machine internal circulation isolation cooling system;

[0052] Figure 2 This is the front view of the integrated internal circulation isolation cooling system of the whole machine;

[0053] Figure 3It is a partial enlarged schematic diagram of the heat conduction ring of the integrated internal circulation isolation heat dissipation system of the whole machine;

[0054] Figure 4 This is a cross-sectional view of the integrated internal circulation isolation cooling system of the whole machine;

[0055] Figure 5 A top view of the second bending section of the air circulation duct; DETAILED DESCRIPTION

[0056] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0057] See also Figure 1-5 As shown, the specific embodiments provided by the present invention are as follows:

[0058] Example 1

[0059] The integrated whole machine internal circulation isolation heat dissipation system is characterized by comprising:

[0060] Heat sink (1);

[0061] Air circulation ducts (2);

[0062] Phase change materials (3);

[0063] Phase change material flow channel (4);

[0064] Exhaust fan (5);

[0065] The heat dissipation box (1) comprises a first connection portion (101), a second connection portion (102), a third connection portion (103), and a fourth connection portion (104);

[0066] The air circulation duct (2) has a first air inlet (201) and a first air outlet (202);

[0067] The first air inlet is connected to the first connection part (101), and the air circulation duct (2) extends from the first connection part (101) into the interior of the heat dissipation box (1), and the first air outlet is connected to the second connection part (102);

[0068] The exhaust fan (5) is located outside the heat dissipation box (1), and the air inlet end of the exhaust fan (5) is connected to the first air outlet;

[0069] The phase change material flow channel (4) has a second air inlet (401) and a second air outlet (402);

[0070] The second air inlet is connected to the third connection portion (103), the second air outlet is connected to the fourth connection portion (104), and the phase change material flow pipe (4) is arranged outside the heat dissipation box (1);

[0071] The phase change material is arranged inside the heat dissipation box (1).

[0072] At present, charging piles mainly include slow charging, small DC charging, fast charging and super charging. Among them, fast charging (60kw-150kw) and super charging (above 150kw) have too large power. Only 95% of the power of the charging pile can be effectively converted during operation, and the remaining 5% will be converted into heat energy. Therefore, this type of charging pile will generate a large amount of heat energy during use. If the generated heat energy cannot be transferred out of the charging pile in time, it is easy to damage the components of the charging pile, and even cause safety hazards such as spontaneous combustion, explosion, and leakage. At present, charging piles on the market generally rely on forced air cooling for heat dissipation. This heat dissipation method uses a fan to draw air outside the charging pile into the charging module with the highest heat generation in the charging pile, and transfers the heat inside the charging pile by thermal convection. This method has low heat dissipation efficiency. It is still a safety hazard when used for heat dissipation of fast charging piles and super charging piles. In addition, this heat dissipation method will allow external air to enter the charging pile. Dust and corrosive substances in the external air will also accelerate the aging of internal components of the charging pile.

[0073] The integrated whole-machine internal circulation isolation heat dissipation system provided in this embodiment is composed of a heat dissipation box (1), an air circulation duct (2), a phase change material, and a phase change material circulation duct (4). In actual use, the air inlet of the air circulation duct (2) and the exhaust fan (5) are connected to the interior of the charging pile. After the exhaust fan (5) is started, it absorbs the air in the air circulation duct (2) and sucks the air inside the charging pile into the air circulation duct (2), so that the air inside the charging pile flows into the air circulation duct (2), passes through the heat dissipation box (1), is absorbed by the phase change material to reduce the temperature, and then enters the interior of the charging pile; the phase change material in the heat dissipation box (1) absorbs heat and lowers the temperature. After absorbing heat, the material changes into gaseous state and rises to enter the phase change material circulation pipe (4). The outer wall of the phase change material circulation pipe (4) contacts the external air, which transfers the heat of the gaseous phase change material (3) to the external air, so that the gaseous phase change material (3) is liquefied and flows into the heat dissipation box (1) again through the fourth connection part (104), thereby completing the heat dissipation of the phase change material. Therefore, the integrated whole machine internal circulation isolation heat dissipation system provided in this embodiment completes the cooling of the air inside the charging pile without inhaling external air, thereby avoiding the situation in which dust and corrosive substances in the external air enter the interior of the charging pile in the traditional heat dissipation method.

[0074] Example 2

[0075] In this embodiment, as a further improvement of the technical solution of Embodiment 1, it is characterized by comprising:

[0076] Thermal conductive sheet (6);

[0077] Thermal conductive ring (7);

[0078] The phase change material circulation pipeline (4) has a first bending section (403);

[0079] The first bending section (403) is in a spiral shape and is arranged in close contact with the inner wall of the heat conducting ring (7);

[0080] The heat conducting sheet (6) is connected to the outer wall of the heat conducting ring (7).

[0081] Considering that too much heat is emitted during the use of fast charging and super charging piles, the phase change material may vaporize too quickly. The liquefaction efficiency of the vaporized phase change material in the phase change material circulation pipeline (4) cannot keep up with the vaporization speed, affecting the heat dissipation effect.

[0082] In this embodiment, the phase change material circulation pipeline (4) is provided with a first bending section (403) having a spiral shape, which increases the length of the phase change material circulation pipeline (4), so that the gaseous phase change material has a longer heat dissipation time in the phase change material circulation pipeline (4). At the same time, the first bending section (403) is arranged in close contact with the heat conductive ring (7), and a heat conductive sheet (6) is connected to the outer wall of the heat conductive ring (7), further increasing the contact area between the heat source and the air. The magnitude of the heat flow is proportional to the thermal conductivity, heat transfer area, and heat transfer time of the heat transfer material. Therefore, it can be seen that this embodiment effectively increases the heat transfer time of the gaseous phase change material, the contact area between the heat source and the air, and effectively increases the heat flowing from the gaseous phase change material into the external air, so that the liquefaction efficiency of the gaseous phase change material in the circulation pipeline is effectively improved.

[0083] Preferably, the integrated whole machine internal circulation isolation heat dissipation system is characterized by comprising:

[0084] A cooling fan (8) having an air outlet (801);

[0085] The air outlet of the heat dissipation fan faces the heat conductive ring (7) and the heat conductive sheet (6).

[0086] In this embodiment, a heat dissipation fan is provided on one side of the heat conductive ring (7) and the heat conductive sheet (6); the heat dissipation fan can be connected to the outer wall of the heat dissipation box (1) and to the heat conductive ring (7); the heat dissipation fan supplies air so that the hot air generated near the heat dissipation sheet and the supplied air can be quickly convected, thereby further increasing the heat dissipation efficiency of the heat conductive ring (7) and the heat conductive sheet (6).

[0087] Example 3

[0088] In this embodiment, as a further improvement of the technical solution of Embodiment 1, it is characterized in that the third connecting portion (103) is arranged above the heat dissipation box (1) and is in the shape of a trumpet that is small at the top and large at the bottom.

[0089] Considering that after the phase change material vaporizes and rises in the heat dissipation box (1), a portion of it will directly flow into the phase change material circulation pipe (4), while the other portion will contact the inner wall of the heat dissipation box (1) and needs to move horizontally to below the second air inlet of the phase change material circulation pipe (4) before continuing to rise. The speed of flowing into the phase change material circulation pipe (4) is relatively slow, which is not conducive to the heat transfer in the heat dissipation box (1).

[0090] Therefore, in this embodiment, the third connection portion (103) is arranged above the heat dissipation box (1) and is in the shape of a trumpet with a small top and a large bottom. When the phase change material vaporizes, it directly converges upward into the phase change material flow pipe (4), thereby quickly reducing the overall heat in the heat dissipation box (1).

[0091] Example 4

[0092] In this embodiment, as a further improvement of the technical solution of Embodiment 1, it is characterized in that the second air outlet extends from the fourth connecting portion (104) into the phase change material.

[0093] Considering that the second air outlet of the phase change material flow pipe (4) is connected to the heat dissipation box (1), the phase change material will enter the second air inlet and the second air outlet at the same time after being vaporized, and the vaporized phase change material will rise from the second air outlet and contact with the liquefied phase change material in the phase change material flow pipe and increase the temperature of the liquefied phase change material, which will also reduce the flow distance of the phase change material flow pipe (4), thereby reducing the heat dissipation effect.

[0094] Therefore, in this embodiment, a second air outlet is arranged to extend from the fourth connection portion (104) into the phase change material, so that the vaporized phase change material cannot enter from the second air outlet, thereby maximizing the flow distance of the vaporized phase change material in the phase change material circulation pipe (4), transferring as much heat of the vaporized phase change material as possible to the external air, thereby increasing the heat dissipation effect.

[0095] Example 5

[0096] In this embodiment, as a further improvement of the technical solution of Embodiment 1, it is characterized by further comprising:

[0097] Water spray device (9);

[0098] The water spray device (9) is arranged in the heat dissipation box (1);

[0099] The water spray device (9) can absorb the phase change material and atomize the phase change material and spray it into the air circulation duct (2);

[0100] The phase change material is in liquid state at room temperature.

[0101] In this embodiment, a water spray device (9) is provided. The liquid phase change material in the heat dissipation box (1) is absorbed by the water spray device (9), and the liquid phase change material is atomized and sprayed to the air circulation pipe (2). After the liquid is atomized, it will become fine particles with a diameter of only 1-5 microns. Because the single volume is small, it is easy to evaporate, and the heat taken away will also be accelerated. When the liquid evaporates, it will absorb the heat in the surrounding air and the air circulation pipe (2). The higher the temperature of the circulation pipe and the external air, the more obvious the effect. The atomized liquid evaporates and quickly absorbs the heat of the air circulation pipe (2), and the air circulation pipe (2) absorbs the heat of the air inside the pipe, thereby achieving rapid cooling of the air inside the charging pile that is sucked in.

[0102] Example 6

[0103] In this embodiment, as a further improvement of the technical solution of Embodiment 5, it is characterized in that the water spray device (9) is arranged below the air circulation duct (2).

[0104] Considering that the phase change material will gradually rise after evaporation, and the water spray device (9) is always in a state of atomizing and spraying the liquid phase change material, if the atomizing spray direction of the phase change material is different from the rising direction of the phase change material after evaporation, the atomized phase change material may mix with the evaporated phase change material and absorb the heat of the evaporated phase change material, so that the heat of part of the evaporated phase change material cannot be transferred out of the heat dissipation box (1), affecting the heat dissipation effect. Therefore, in this embodiment, the water spray device (9) is arranged below the air circulation duct (2), so that the atomized phase change material is sprayed from bottom to top to the air circulation duct (2), effectively avoiding the influence on the rise of the evaporated phase change material and leaving the heat dissipation box (1).

[0105] Example 7

[0106] In this embodiment, as a further improvement of the technical solution of Embodiment 6, it is characterized in that:

[0107] The air circulation duct (2) has a second bending section (203);

[0108] The second bending section (203) comprises:

[0109] Multi-section straight pipe (2031);

[0110] Multi-section elbow (2032);

[0111] The multiple sections of straight pipes (2031) are arranged in parallel, the curved pipe (2032) is connected to two adjacent straight pipes (2031), and the adjacent curved pipes (2032) are respectively located at opposite ends of the straight pipes (2031).

[0112] Considering that the amount of heat transfer is proportional to the contact area and transfer time of an object, in this embodiment, the air circulation duct (2) is provided with a second bending section (203), which is arranged to be bent in multiple sections, thereby increasing the length of the air circulation duct (2) in the heat dissipation box (1) within a limited space, thereby increasing the time for the air inside the charging pile to flow into the air circulation duct (2). At the same time, because the length of the air circulation duct (2) increases, the contact area between its surface and the air in the heat dissipation box (1) and the atomized phase change material will also increase accordingly, further increasing the heat dissipation effect of the system. In some embodiments, multiple groups of second bending sections (203) are provided, and the multiple groups of second bending sections (203) are placed horizontally and connected in the vertical direction through connecting pipes, thereby further increasing the length of the air circulation duct (2) and enhancing the heat dissipation effect.

[0113] Example 8

[0114] In this embodiment, as a further improvement of the technical solution of Embodiment 7, it is characterized by further comprising:

[0115] Heat conduction box (10);

[0116] The heat conduction box (10) is arranged in the heat dissipation box (1);

[0117] The heat conduction box (10) has an internal cavity (1001), a first through hole (1002), and a second through hole (1003);

[0118] The air circulation duct (2) passes through the first through hole (1002) into the internal cavity (1001), and passes through the second through hole (1003);

[0119] The bent section of the air circulation duct (2) is arranged in the internal cavity (1001) of the heat conduction box (10) and is in close contact with the surface of the internal cavity (1001).

[0120] Taking into account the existence of gaps between the multiple straight tubes (2031) of the second bending section (203) in Example 6, after the spraying device sprays the atomized phase change material into the air circulation duct (2), part of the atomized phase change material will pass through the gaps between the multiple straight tubes (2031) and will not be able to contact the air circulation duct (2) to absorb heat. Furthermore, after the atomized phase change material passes through the gaps, it will rise to a certain height and will drop due to its own gravity, contacting the rising phase change material vapor, affecting the phase change material vapor from being able to dissipate heat and reducing the heat dissipation effect.

[0121] Therefore, in this embodiment, a heat conducting box (10) is arranged in the heat dissipation box (1), and the bent section of the air circulation duct (2) is arranged in the internal cavity (1001) of the heat conducting box (10) and in close contact with the surface of the internal cavity (1001), so that the heat conducting box (10) absorbs the heat of the air circulation duct (2) and at the same time makes the atomized phase change material contact with the lower surface of the heat conducting box (10). Because the lower surface area of ​​the heat conducting box (10) is larger than the lower surface area of ​​the air circulation duct (2), at the same time, the provision of the heat conducting box (10) prevents the atomized phase change material from passing through the gaps between the multiple straight tubes (2031). After rising to a certain height, it will fall due to its own gravity and contact with the rising phase change material vapor, so that the heat dissipation effect is effectively improved.

[0122] In some embodiments, a material with high thermal conductivity is selected to make the heat transfer box, such as aluminum or copper, to further increase the heat transfer efficiency between the air circulation duct (2) and the heat transfer box, and between the phase change material and the heat transfer box, thereby accelerating the cooling speed of the air in the air circulation duct (2).

[0123] Preferably, thermally conductive silicone grease is provided between the surface of the internal cavity (1001) of the heat conduction box (10) and the second bent section of the air flow duct.

[0124] In this embodiment, a thermal conductive silicone grease is arranged in the internal cavity (1001) of the heat conducting box (10). The thermal conductive silicone grease can maintain a grease state for a long time at a temperature of -50°C to 230°C. The thermal conductive silicone grease has excellent thermal conductivity and is used to fill the gap between the surface of the internal cavity (1001) of the heat conducting box (10) and the bent section of the air circulation duct (2). The thermal conductive silicone grease is used as a medium to accelerate the heat transfer from the air circulation duct (2) to the heat conducting box (10).

[0125] Example 9

[0126] In this embodiment, as a further improvement of the technical solution of Embodiment 8, it is characterized in that the bottom of the heat conduction box (10) is a porous hole-like structure (1004).

[0127] In order to further increase the contact area between the atomized phase change material and the bottom of the thermal conductive box (10), thereby accelerating the heat transfer rate from the thermal conductive box (10) to the phase change material, the present embodiment arranges the bottom of the thermal conductive box (10) to be a porous hole structure (1004), such as a honeycomb structure or a grid structure. The phase change material is sprayed onto the structure and can contact the inner surface of the holes. The area of ​​the inner surfaces of the multiple holes is much larger than the area of ​​a bottom plane. This arrangement greatly increases the heat transfer rate between the atomized phase change material and the bottom of the thermal conductive box (10), thereby improving the heat dissipation efficiency.

[0128] In the description of the embodiments of the present invention, it needs to be understood that terms such as “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “center”, “top”, “bottom”, “top”, “bottom”, “inside”, “outside”, “inside”, and “outside” indicate orientation or positional relationships.

[0129] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", and "assemble" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0130] In the description of the embodiments of the present invention, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0131] In the description of the embodiments of the present invention, it should be understood that "-" and "~" represent the range between two values, and the range includes the endpoints. For example: "AB" represents a range greater than or equal to A and less than or equal to B. "A~B" represents a range greater than or equal to A and less than or equal to B.

[0132] In the description of the embodiments of the present invention, the term "and / or" herein is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " herein generally indicates that the associated objects before and after are in an "or" relationship.

[0133] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. The integrated whole machine internal circulation isolation cooling system is characterized by: include: Radiator box; Air circulation ducts; Phase change materials; Phase change material flow pipeline; Exhaust fan; The heat dissipation box has a first connection part, a second connection part, a third connection part, and a fourth connection part; The air circulation duct has a first air inlet and a first air outlet; The first air inlet is connected to the first connection portion, and the air circulation duct extends from the first connection portion into the interior of the heat dissipation box, and the first air outlet is connected to the second connection portion; The exhaust fan is located outside the heat dissipation box, and the air inlet end of the exhaust fan is connected to the first air outlet; The phase change material flow channel has a second air inlet and a second air outlet; The second air inlet is connected to the third connection portion, the second air outlet is connected to the fourth connection portion, and the phase change material flow pipe is arranged outside the heat dissipation box; The phase change material is arranged inside the heat dissipation box; The air circulation duct has a second bending section; The second bending section comprises: Multiple straight pipe sections; Multi-section pipe bending; The multiple straight pipes are arranged in parallel, the curved pipe is connected to two adjacent straight pipes, and the adjacent curved pipes are located at opposite ends of the straight pipes; Also includes: Heat transfer box; The heat conduction box is arranged in the heat dissipation box; The heat conduction box has an internal cavity, a first through hole, and a second through hole; The air circulation duct passes through the first through hole into the internal cavity and passes through the second through hole; The bent section of the air circulation duct is arranged in the inner cavity of the heat conduction box and is closely attached to the surface of the inner cavity; The third connection portion is disposed above the heat dissipation box and is in the shape of a trumpet with a small top and a large bottom; The second air outlet extends from the fourth connecting portion into the phase change material.

2. The integrated whole machine internal circulation isolation heat dissipation system according to claim 1 is characterized in that: include: Thermal conductive sheet; Thermal conductive ring; The phase change material flow channel is bent and closely attached to the inner wall of the heat conduction ring; The heat conducting sheet is connected to the outer wall of the heat conducting ring.

3. The integrated whole machine internal circulation isolation heat dissipation system according to claim 2 is characterized in that: include: A cooling fan with an air outlet; The air outlet of the heat dissipation fan faces the heat conductive ring and the heat conductive sheet.

4. The integrated whole machine internal circulation isolation heat dissipation system according to claim 1 is characterized in that: Also includes: Water spraying device; The water spray device is arranged in the heat dissipation box; The water spray device can absorb the phase change material and atomize the phase change material and spray it into the air circulation duct; The phase change material is in liquid state at room temperature.

5. The integrated whole machine internal circulation isolation heat dissipation system according to claim 4 is characterized in that: The water spray device is arranged below the air circulation duct.

6. The integrated whole machine internal circulation isolation heat dissipation system according to claim 1, characterized in that: The bottom of the heat conduction box is a honeycomb structure.

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