Dry ice driven circulating cooling system and individual cooling clothes

Abstract

The invention relates to a dry ice driven circulating cooling system and individual cooling clothes, comprising a heat exchange device provided with a storage cavity and a cooling cavity, the storage cavity and the cooling cavity being close to each other; the driving device comprises a driving device barrel, an extrusion piston, a sealing plug and an extrusion elastic piece, the extrusion piston is movably connected into the driving device barrel in a sealed mode and divides the driving device barrel into a driving cavity and an extrusion cavity, the driving cavity communicates with the storage cavity, the extrusion cavity communicates with the cooling cavity, and the driving cavity is provided with an exhaust port used for exhausting gas; the sealing plug is connected with the piston, and the extrusion elastic piece applies elastic force towards the side where the driving cavity is located to the extrusion piston and / or the sealing plug; the cooling pipe is communicated with the cooling cavity and the extrusion cavity; the dry ice is arranged in the storage cavity; and the cooling liquid circularly flows among the cooling cavity, the extrusion cavity and the cooling pipe. The dry ice is used as a cold source, frostbite caused by too tight contact between the dry ice and the human body is prevented, the use time is long, carrying is convenient, and no extra power device is needed.

Description

Technical Field

[0001] The present invention relates to the technical field of protective clothing, in particular to a dry ice driven circulating cooling system and personal protective clothing. Background Art

[0002] Existing protective clothing faces technical bottlenecks, making it difficult to balance protective performance with breathability, comfort, and ease of wear. Furthermore, it faces common issues such as insufficient material durability and poor environmental sustainability. These problems are particularly acute in high-temperature environments, not only weakening the actual effectiveness of protective equipment but also posing a serious threat to the physical and mental health of workers. Sustained high temperatures can lead to a decline in the wearer's physiological functions, resulting in a dual decrease in work enthusiasm and labor efficiency; hot and humid environments can easily cause skin damage and induce occupational diseases; and heat accumulation in confined spaces can cause acute health risks such as heat stroke and hypoxia, which can be life-threatening in severe cases.

[0003] To address this issue, cooling garments have emerged, using various mechanisms to lower body temperature. Common cooling methods include gas cooling, phase change material cooling, semiconductor cooling, and liquid cooling. Gas cooling is categorized into convection and evaporation. Convection uses a refrigeration unit to generate low-temperature gas (needed to be below skin temperature), which is piped into the garment and removed through air convection. However, this approach suffers from low cooling efficiency and complex systems. Evaporation utilizes a water vapor pressure gradient to promote the evaporation of sweat. While it doesn't require low-temperature gas, its effectiveness decreases significantly in high humidity environments, requiring frequent hydration and poor comfort. Phase change material cooling achieves cooling by absorbing latent heat during phase changes (such as solid-liquid conversion). However, due to the material's limited heat capacity, its cooling duration is short (typically 1-2 hours), and extensive use can result in bulky garments and insufficient temperature control capabilities. Semiconductor cooling, based on the Peltier effect, utilizes current to drive semiconductor temperature differences to generate refrigeration. However, its thermoelectric conversion efficiency is less than 20%, and it requires an external heat sink (such as a fan), resulting in increased size and significant noise. High energy consumption further limits its battery life. Liquid cooling is the mainstream solution, which uses cooling pipes to transport low-temperature media (such as water and phase-change emulsions) to remove body heat. However, there are high pipe maintenance costs, the risk of liquid leakage causing skin irritation or poisoning, and poor environmental adaptability - low temperatures can easily cause the coolant to freeze, and high-temperature environments may not provide sufficient cooling.

[0004] Overall, while existing cooling technologies each have their advantages, they all have significant shortcomings: gas cooling efficiency is constrained by the environment, phase change materials and semiconductor solutions are limited by endurance and energy consumption, respectively, and liquid cooling faces challenges in safety and adaptability. Therefore, there is an urgent need for cooling clothing that improves overall wear time, comfort, and ergonomics. Summary of the Invention

[0005] To this end, the present invention provides a dry ice driven circulating cooling system and individual cooling clothing, which improve the overall usage time, wearing comfort and ergonomics of use, and a foldable flapping wing mechanism that can be intelligently folded and unfolded.

[0006] To solve the above technical problems, the present invention provides a dry ice driven circulating cooling system, comprising: The heat exchange device is provided with a storage chamber and a cooling chamber, wherein the storage chamber and the cooling chamber are close to each other; A drive device, comprising a drive device cylinder, an extrusion piston, a sealing plug, and an extrusion elastic member, wherein the extrusion piston is movably and sealingly connected to the drive device cylinder and divides the drive device cylinder into a drive chamber and an extrusion chamber, wherein the drive chamber is in communication with the storage chamber, and the extrusion chamber is in communication with the cooling chamber, and the drive chamber is provided with an exhaust port for exhausting gas. The sealing plug is connected to the piston, and the extrusion elastic member applies an elastic force to the extrusion piston and / or the sealing plug toward the side of the drive chamber; A cooling pipe connecting the cooling chamber and the extrusion chamber; Dry ice, located in the storage chamber; Cooling liquid circulates between the cooling chamber, the extrusion chamber and the cooling pipe; In the first working state, the elastic force of the extrusion elastic member forces the extrusion piston to remain in the first position, and the sealing plug seals the exhaust port; In the second working state, the gas generated by the heat exchange and sublimation of the dry ice in the storage chamber and the coolant in the cooling chamber drives the extrusion piston to overcome the elastic force of the extrusion elastic member and move from the first position to the second position, and the sealing plug is separated from the exhaust port.

[0007] Furthermore, the extrusion elastic member is a compression spring, and the extrusion elastic member is installed in the extrusion cavity.

[0008] Furthermore, the sealing plug is connected to the extrusion piston via a delay elastic member.

[0009] Furthermore, the storage chamber is provided with a feeding port for adding dry ice.

[0010] Furthermore, it also includes a pressure stabilizing device, which includes a pressure stabilizing device cylinder, a buffer piston and a buffer elastic member. The buffer piston is movably sealed and connected to the pressure stabilizing device cylinder to form a buffer cavity. The cooling tube is connected to the extrusion cavity through the buffer cavity. The buffer elastic member applies an elastic force to the buffer piston toward the side where the buffer cavity is located.

[0011] Furthermore, a one-way valve is provided on the pipeline between the buffer chamber and the extrusion chamber.

[0012] Furthermore, the buffer elastic member is a compression spring, and the buffer elastic member is installed on a side of the buffer piston away from the buffer cavity.

[0013] Furthermore, the heat exchange device includes a first heat exchange device cylinder and a second heat exchange device cylinder arranged inside and outside, the inner cavity of the first heat exchange device cylinder is the storage cavity, and the annular cavity between the second heat exchange device cylinder and the first heat exchange device cylinder is the cooling cavity.

[0014] Furthermore, the cylinder of the second heat exchange device is a heat-insulating cylinder.

[0015] The present invention also provides an individual cooling suit, comprising a protective suit body and the dry ice driven circulating cooling system, wherein the cooling pipes are distributed in the protective suit body, and the coolant in the cooling pipes is used for heat exchange with the human body.

[0016] The present invention also provides an individual cooling suit, comprising a protective suit body and the dry ice driven circulating cooling system, wherein the cooling pipes are distributed in the protective suit body, and the coolant in the cooling pipes is used for heat exchange with the human body.

[0017] The above-mentioned technical solution of the present invention has the following advantages over the existing technology: The dry ice-driven circulating cooling system and individual cooling suit described in the present invention cool the human body by exchanging heat with the human body through the cooling tube. When the human body temperature rises, the coolant temperature in the cooling tube also rises, and the coolant exchanges heat with the dry ice. The dry ice sublimates, absorbing a large amount of heat and converting into a gaseous state, generating carbon dioxide, which cools the coolant inside the cooling tube while driving the coolant flow. The advantages are as follows: ① The dry ice does not come into contact with the human body through the cooling tube, preventing frostbite caused by close contact with the human body; ② The dry ice retains its heat for a long time, allowing for a longer use period; ③ The dry ice is lightweight and compact, and its weight gradually decreases over time, making it easy to carry; ④ The gas generated by the sublimation of the dry ice serves as the power to drive the circulation of the coolant, eliminating the need for an additional power device for the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0019] Figure 1 Schematic diagram of the dry ice driven circulating cooling system of the present invention.

[0020] Description of the accompanying drawings: 1. Heat exchange device; 11. Storage chamber; 12. Cooling chamber; 13. First heat exchange device cylinder; 14. Second heat exchange device cylinder; 2. Driving device; 21. Driving device cylinder; 22. Extrusion piston; 23. Sealing plug; 24. Extrusion elastic member; 25. Driving chamber; 26. Extrusion chamber; 27. Exhaust port; 28. Delay elastic member; 3. Cooling pipe; 31. One-way valve; 4. Dry ice; 5. Coolant; 6. Pressure stabilizing device; 61. Pressure stabilizing device cylinder; 62. Buffer piston; 63. Buffer elastic member; 64. Buffer chamber. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0022] See also Figure 1 As shown, an embodiment of the dry ice driven circulating cooling system provided by the present invention.

[0023] The dry ice driven circulating cooling system includes: The heat exchange device 1 is provided with a storage chamber 11 and a cooling chamber 12, wherein the cooling chamber 12 and the storage chamber 11 are close to each other; The drive device 2 includes a drive device cylinder 21, an extrusion piston 22, a sealing plug 23, and an extrusion elastic member 24. The extrusion piston 22 is movably and hermetically connected to the drive device cylinder 21 and divides the drive device cylinder 21 into a drive chamber 25 and an extrusion chamber 26. The drive chamber 25 is in communication with the storage chamber 11, and the extrusion chamber 26 is in communication with the cooling chamber 12. The drive chamber 25 is provided with an exhaust port 27 for exhausting gas. The sealing plug 23 is connected to the piston. The extrusion elastic member 24 applies an elastic force to the extrusion piston 22 and / or the sealing plug 23 toward the side of the drive chamber 25. The cooling pipe 3 is connected to the cooling chamber 12 and the extrusion chamber 26; Dry ice 4, stored in the storage chamber 11; The cooling liquid 5 circulates between the cooling chamber 12, the extrusion chamber 26 and the cooling pipe 3; In the first working state, the elastic force of the extrusion elastic member 24 forces the extrusion piston 22 to remain in the first position, and the sealing plug 23 seals the exhaust port 27; In the second working state, the dry ice in the storage chamber 11 and the coolant in the cooling chamber 12 undergo heat exchange and sublimation to generate gas that drives the extrusion piston 22 to overcome the elastic force of the extrusion elastic member 24 and move from the first position to the second position, and the sealing plug 23 disengages from the exhaust port 27.

[0024] In the above, the storage chamber 11 refers to a sealed container for storing solid carbon dioxide. Its adjacent layout to the cooling chamber 12 forms an efficient heat conduction channel between the two. The storage chamber 11 realizes heat exchange through the adjacent layout to the cooling chamber 12. The drive chamber 25 and the extrusion chamber 26 refer to the variable volume space separated by the extrusion piston 22. The exhaust port 27 of the drive chamber 25 opens to release gas when the pressure exceeds the limit, and the extrusion chamber 26 generates a hydraulic driving force through the volume change. The extrusion elastic member 24 refers to a mechanical element that provides a reset force, and its preload setting determines the system working pressure threshold. The sealing plug 23 refers to a dynamic sealing element, which realizes the opening and closing control of the exhaust port under the action of the elastic member. The cooling pipe 3 refers to a flexible heat-conducting pipeline, which realizes the circulation of coolant and heat transfer through the internal flow channel.

[0025] Specifically, when the coolant absorbs heat from the human body, its temperature rises, and when it flows through the cooling chamber 12, it exchanges heat with the dry ice in the storage chamber 11. After absorbing heat, the dry ice sublimates to produce carbon dioxide gas, and the gas pressure pushes the extrusion piston 22 to move toward the extrusion chamber 26. The extrusion elastic member 24 stores energy and at the same time drives the sealing plug 23 to disengage from the exhaust port 27, allowing the gas accumulated in the drive chamber 25 to be released. The elastic potential energy stored in the deformation process of the extrusion elastic member 24 pushes the extrusion piston 22 to reset after the gas pressure decreases, prompting the coolant to return from the extrusion chamber 26 to the cooling chamber 12, forming a circulating flow. This process achieves autonomous circulation of the coolant without the need for external power input through the dynamic balance between the gas pressure generated by the phase change of dry ice and the elastic reset force. The system automatically switches between the two working states, ensuring both heat exchange efficiency and avoiding the risk of pressure overload.

[0026] The above technical solution has the following advantages: ① Dry ice does not come into contact with the human body through the cooling tube to exchange heat with the human body, thus preventing frostbite caused by close contact between the dry ice and the human body; ② Dry ice can be kept for a long time and can be used for a long time; ③ Dry ice is light in weight and small in size, and its weight gradually decreases over time, making it easy to carry; ④ The gas generated when the dry ice sublimates can be used as power to drive the circulation of the coolant, and the entire system does not require an additional power device.

[0027] In this embodiment, the extrusion elastic member 24 is a compression spring, and the extrusion elastic member 24 is installed in the extrusion cavity 26 .

[0028] As described above, the compression spring refers to a helical elastic element used to generate a linear restoring force, its axis coaxially arranged with the motion trajectory of the extrusion piston 22. The extrusion chamber 26 refers to the space within the drive device 2 separated by the extrusion piston 22. Specifically, it is formed by the sliding seal between the drive device cylinder 21 and the extrusion piston 22. It is used to accommodate the compression spring and constrain its deformation direction.

[0029] Specifically, when the dry ice vaporizes in the cooling chamber 12 and generates pressure, the air pressure within the extrusion chamber 26 pushes the extrusion piston 22 toward the second position, overcoming the elastic force of the extrusion spring 24. The extrusion spring 24 uniformly deforms along the extrusion piston 22's motion path within the extrusion chamber 26. Its linear elastic properties ensure that the displacement of the extrusion piston 22 is directly proportional to the air pressure. During the reset phase of the extrusion piston 22, the extrusion spring 24 releases its stored elastic potential energy, driving the extrusion piston 22 back to its initial position.

[0030] Through the above technical solution, the present invention realizes the compact layout of the elastic reset mechanism inside the driving device 2, and the axial compression deformation mode of the extrusion elastic member 24 in the extrusion cavity 26, ensuring the precise control of the motion trajectory of the extrusion piston 22 during the gasification pressure drive and elastic reset process, thereby improving the reliability of the cooling system circulation action.

[0031] In this embodiment, the sealing plug 23 is connected to the extrusion piston 22 via a delay elastic member 28 .

[0032] As described above, the delay elastic member 28 applies an elastic force to the sealing plug 23 toward the exhaust port 27. This prevents the sealing plug 23 from immediately separating from the exhaust port 27 when the extrusion piston 22 begins to move. Instead, it delays separation from the exhaust port 27 for a period of time, allowing the extrusion piston 22 to push the coolant in the extrusion chamber 26. When the extrusion piston 22 returns to its original position, the sealing plug 23 seals the exhaust port 27, but the extrusion piston 22 can continue to move, thereby extending the time it takes to squeeze the coolant and ensuring proper circulation of the coolant.

[0033] Through the above technical solution, the present invention can extend the stroke of the extrusion piston and effectively drive the coolant to circulate between the cooling chamber 12, the extrusion chamber 26 and the above cooling pipe 3.

[0034] In this embodiment, the storage chamber 11 is provided with a feeding port (not shown in the figure) for adding dry ice.

[0035] The charging port, as used above, refers to an opening in the storage chamber 11 that provides a direct path for dry ice replenishment, avoiding system disassembly or downtime for maintenance. It also maintains the continuity of dry ice storage and replenishment.

[0036] Specifically, a charging port is integrated into the top or sidewall of storage chamber 11. During operation, dry ice in blocks or pellets can be directly added by opening the sealing cover. Once closed, the sealing cover maintains the airtightness of storage chamber 11, preventing the ingress of outside air and the premature sublimation of dry ice. This design allows for the replenishment of dry ice at any time during system operation, resolving the problem of traditional solutions requiring the cooling cycle to be interrupted for maintenance of storage chamber 11.

[0037] Through the above technical solution, the present invention achieves continuous replenishment of the dry ice-driven cooling system while it is in operation, reducing system downtime due to maintenance operations and improving the continuity and efficiency of the cooling cycle. Specifically, the operator can quickly replenish dry ice through the charging port without interrupting the heat exchange process of the cooling tube 3.

[0038] In this embodiment, a pressure stabilizing device 6 is also included. The pressure stabilizing device 6 includes a pressure stabilizing device cylinder 61, a buffer piston 62 and a buffer elastic member 63. The buffer piston 62 is movably sealed and connected to the pressure stabilizing device cylinder 61 to form a buffer cavity 64. The cooling tube 3 is connected to the extrusion cavity 26 through the buffer cavity 64. The buffer elastic member 63 applies an elastic force to the buffer piston 62 toward the side where the buffer cavity 64 is located.

[0039] In the above, the cylinder 61 of the pressure stabilizing device refers to a container for accommodating the buffer piston 62 and performing pressure regulation, and its inner wall forms a sealing structure with the buffer piston 62. The buffer piston 62 refers to a sealing component that can slide in the cylinder 61 of the pressure stabilizing device, and can be specifically implemented by a piston structure of a rubber sealing ring, and its movement direction is controlled by the pressure change and the elastic member. The buffer elastic member 63 refers to a device for applying an elastic force to the buffer piston 62, and the direction of its elastic force is always toward the buffer chamber 64 side to maintain the basic pressure of the system. The buffer chamber 64 refers to a variable volume space surrounded by the buffer piston 62 and the cylinder 61 of the pressure stabilizing device. Specifically, the size of the chamber can be changed by the displacement of the buffer piston 62 to absorb or release pressure fluctuations.

[0040] Specifically, when the dry ice vaporizes and causes the pressure in the extrusion chamber 26 to increase, the high-pressure gas enters the buffer chamber 64 through the cooling tube 3, pushing the buffer piston 62 to move away from the buffer chamber 64. At this time, the buffer elastic member 63 is deformed by the force, and the volume of the buffer chamber 64 increases to accommodate the excess gas. When the system pressure decreases, the buffer elastic member 63 releases the elastic force, pushing the buffer piston 62 to reset and reduce the volume of the buffer chamber 64, and the stored gas is pressed back into the cooling tube 3. Through the reciprocating motion of the buffer piston 62, the buffer chamber 64 achieves dynamic compensation for pressure fluctuations, so that the liquid flow rate in the cooling tube 3 remains relatively constant. During the sudden change of pressure, the elastic force continuously applied by the buffer elastic member 63 forms a reverse force, forming a dynamic balance with the vaporization pressure, thereby avoiding turbulence or interruption of the coolant due to sudden pressure changes. This process effectively eliminates the pressure oscillations caused by the reciprocating motion of the extrusion piston 22, avoids the circulation path disorder caused by fluid backflow, and reduces the energy loss caused by pressure fluctuations. When the flow rate of dry ice sublimation gas changes suddenly or the driving device squeezes the cooling tube quickly, the buffer piston 62 moves axially under the action of the buffer elastic member 63, dynamically adjusting the volume of the buffer chamber 64 to absorb instantaneous high pressure or supplement negative pressure.

[0041] Through the above-mentioned technical solution, the present invention effectively solves the problem of unstable coolant flow caused by pressure fluctuations during dry ice vaporization. The volume adjustment function of buffer chamber 64 can smooth out instantaneous pressure peaks, preventing pipeline leakage or blockage due to overpressure. The coordinated control of the elastic member and the piston ensures timely pressure compensation and reduces the fluctuation of the coolant flow rate. As a result, the system maintains stable circulation power during the continuous dry ice vaporization process, avoiding the decrease in heat exchange efficiency caused by pressure fluctuations, and significantly improving the reliability of the cooling system operation.

[0042] In this embodiment, a one-way valve 31 is provided on the pipeline between the buffer chamber 64 and the extrusion chamber 26 .

[0043] In the above, the one-way valve 31 refers to a valve device that only allows fluid to flow in one direction. This structure opens under positive fluid pressure and automatically closes under reverse pressure to block reverse flow.

[0044] Specifically, when the pressure in extrusion chamber 26 is higher than that in buffer chamber 64, the disc of check valve 31 is pushed open by the fluid pressure, allowing the coolant or gaseous working medium to flow from extrusion chamber 26 to buffer chamber 64. When the pressure in extrusion chamber 26 drops or the pressure in buffer chamber 64 rises, the return path of the fluid is blocked. Check valve 31 ensures unidirectional flow of coolant, maintaining circulation stability.

[0045] Through the above technical solution, the present invention can maintain the directionality of the working medium flow in the cooling pipe 3, prevent circulation interruption caused by pressure fluctuations, reduce energy loss and improve system operation stability, while avoiding sealing structure impact and potential leakage risks caused by backflow.

[0046] In this embodiment, the buffer elastic member 63 is a compression spring, and the buffer elastic member 63 is installed on a side of the buffer piston 62 away from the buffer cavity 64 .

[0047] In the above description, a compression spring refers to a mechanical element that provides elastic restoring force through linear deformation. Its stiffness coefficient can be designed to match the system pressure fluctuation range. The side of the buffer piston 62 facing away from the buffer chamber 64 refers to the end surface area of the buffer piston 62 that is away from the buffer chamber 64 when the buffer piston 62 moves within the pressure stabilization device cylinder 61.

[0048] Specifically, during the operation of the pressure stabilizing device 6, when the pressure in the cooling pipe 3 increases, causing the volume of the buffer chamber 64 to decrease, the buffer piston 62 is driven by the pressure to move away from the buffer chamber 64. At this time, the buffer elastic member 63 is compressed and generates a reverse elastic force. When the pressure in the cooling pipe 3 drops, the buffer elastic member 63 pushes the buffer piston 62 back to its original position through elastic recovery, thereby balancing the pressure fluctuations in the system. By precisely matching the stiffness coefficient of the buffer elastic member 63, the displacement of the buffer piston 62 can form a linear correspondence with the pressure change, ensuring the real-time and stability of the pressure regulation. Since the buffer elastic member 63 is installed on the outside of the buffer piston 62, direct contact with the coolant is avoided, preventing spring corrosion or elastic failure caused by liquid penetration.

[0049] Through the above technical solution, the present invention effectively solves the technical defects of the elastic element in the pressure stabilizing device 6 being susceptible to environmental corrosion and having a delayed pressure response, realizes the rapid absorption and precise compensation of pressure fluctuations in the cooling system, and significantly improves the stability of the coolant circulation.

[0050] In this embodiment, the above-mentioned heat exchange device 1 includes a first heat exchange device cylinder 13 and a second heat exchange device cylinder 14 arranged inside and outside. The inner cavity of the above-mentioned first heat exchange device cylinder 13 is the above-mentioned storage cavity 11, and the annular cavity between the above-mentioned second heat exchange device cylinder 14 and the above-mentioned first heat exchange device cylinder 13 is the above-mentioned cooling cavity 12.

[0051] In the above, the inner and outer first heat exchange device cylinder 13 and the second heat exchange device cylinder 14 refer to two cylinders of different diameters that are concentrically nested and assembled, with precise gap control achieved through machining to form an inner and outer double-layer structure to maximize the heat transfer surface. The annular cavity refers to the annular space enclosed by the inner wall of the second heat exchange device cylinder 14 and the outer wall of the first heat exchange device cylinder 13. This annular cavity serves as a flow path for the coolant, allowing the coolant to form an enclosed contact with the dry ice storage area within the annular area. The storage chamber 11 refers to the enclosed space inside the first heat exchange device cylinder 13, which is used to centrally store solid dry ice blocks to avoid local uneven vaporization caused by the dispersion of dry ice.

[0052] Specifically, the first heat exchanger cylinder 13 serves as the inner layer, directly housing the dry ice. The second heat exchanger cylinder 14, as the outer layer, encloses the first heat exchanger cylinder 13, forming an annular channel between the two for coolant circulation. During the heat exchange process, the metal wall of the first heat exchanger cylinder 13 acts as a heat transfer medium, transferring the low temperature of the dry ice through the cylinder to the coolant in the annular cavity. Because the annular cavity encloses the entire outer surface of the first heat exchanger cylinder 13, a 360-degree surround contact surface is formed between the coolant and the dry ice storage area, increasing the contact area by approximately 2-3 times compared to traditional layered stacking structures. Furthermore, the inner-outer cylindrical structure integrates two previously separate chambers into a single axial space, reducing the device volume by approximately 40%-50%. A mere 3-5 mm annular gap is required between the second heat exchanger cylinder 14 and the first heat exchanger cylinder 13 for coolant flow. This compact layout eliminates the ineffective spacing between chambers found in traditional solutions. It can prevent dry ice from coming into direct contact with the human body and causing frostbite, while ensuring that the heat absorbed by dry ice sublimation only acts on the circulating coolant.

[0053] Through the above technical solution, the present invention achieves efficient heat transfer between dry ice and coolant. The annular contact surface increases the amount of cooling transferred per unit time by approximately 65%, thereby accelerating the vaporization of dry ice and improving the system's driving force. The internal and external enclosure structure allows the device to accommodate both the dry ice storage area and the coolant circulation area within a limited space, improving space utilization by approximately 50% compared to traditional separate chambers. This solves the problem of balancing portability and cooling efficiency in high-temperature operating environments.

[0054] In this embodiment, the second heat exchange device cylinder 14 is a heat-insulating cylinder.

[0055] In the above, the heat-insulating cylinder refers to an annular structure made of a material with low thermal conductivity, and its function is to block the heat conduction path between the cooling chamber 12 and the external environment through the heat-insulating properties of the material itself.

[0056] Specifically, the second heat exchange device cylinder 14 is wrapped around the outside of the first heat exchange device cylinder 13 to form a cooling chamber 12 with an annular cavity structure. During the storage and circulation of the coolant, the heat-insulating cylinder prevents the coolant temperature from rising due to ambient temperature fluctuations by suppressing the transfer of external heat into the cooling chamber 12. For example, when the external ambient temperature is higher than the coolant temperature in the cooling chamber 12, the heat-insulating cylinder can block the intrusion of external heat; when the external temperature is lower than the coolant temperature, it prevents internal heat from dissipating outward. As a result, the coolant is always in a relatively constant low-temperature state during the storage stage, reducing energy loss before heat exchange.

[0057] Through the above technical solution, the present invention can control the temperature fluctuation amplitude of the coolant during the storage stage within a preset range, reduce the need for repeated cooling of the coolant due to environmental interference, thereby improving the energy utilization efficiency of dry ice vaporization drive and ensuring the operating stability of the cooling system in complex temperature environments.

[0058] The present invention also provides an individual cooling suit, comprising a protective suit body (not shown) and the above-mentioned dry ice driven circulating cooling system, wherein the above-mentioned cooling pipes 3 are distributed in the above-mentioned protective suit body, and the coolant in the above-mentioned cooling pipes 3 is used for heat exchange with the human body.

[0059] The present invention further proposes an individual cooling suit, including a protective suit body and a dry ice driven circulating cooling system, wherein the cooling pipes 3 are distributed in the protective suit body, and the coolant in the cooling pipes 3 is used to exchange heat with the human body; the dry ice driven circulating cooling system includes a heat exchange device 1, a drive device 2, and a cooling pipe 3, wherein the heat exchange device 1 is provided with a storage chamber 11 and a cooling chamber 12, wherein the storage chamber 11 is used to accommodate dry ice, and the cooling chamber 12 and the storage chamber 11 are close to each other; the drive device 2 includes a drive device cylinder 21, an extrusion piston 22, a sealing plug 23 and an extrusion elastic member 24, wherein the extrusion piston 22 is movably and sealedly connected to the drive device cylinder 21 and divides the drive device cylinder 21 into a drive chamber 25 and an extrusion piston 24. The pressure chamber 26 and the driving chamber 25 are provided with an exhaust port for discharging gas, the sealing plug 23 is connected to the piston, and the extrusion elastic member 24 applies an elastic force toward the side where the driving chamber 25 is located to the extrusion piston 22 or the sealing plug 23; one end of the cooling tube 3 is connected to the cooling chamber 12, and the other end is connected to the extrusion chamber 26; in the first working state, the elastic force of the extrusion elastic member 24 forces the piston to remain in the first position, and the sealing plug 23 seals the exhaust port; in the second working state, the dry ice in the storage chamber 11 exchanges heat with the coolant in the cooling chamber 12. After the dry ice in the cooling chamber 12 is vaporized, the extrusion piston 22 moves from the first position to the second position, the piston drives the extrusion elastic member 24 to deform, and the sealing plug 23 disengages from the exhaust port.

[0060] Among them, the heat exchange device 1 refers to a dual-chamber structure for accommodating dry ice and coolant, the storage chamber 11 is used for storing solid dry ice, and the cooling chamber 12 is used for storing liquid coolant, and the heat conduction path is shortened by setting adjacent cavities. The driving device 2 refers to a mechanism that converts the vaporization pressure of dry ice into mechanical motion, which pushes the piston displacement and compresses the elastic member to store energy through gas expansion. The sealing plug 23 refers to a component that controls the opening and closing of the exhaust port, and relies on the pre-tightening force of the elastic member to achieve sealing. When the vaporization pressure exceeds the threshold, it automatically detaches from the exhaust port. The cooling pipe 3 refers to a fluid circulation channel distributed in the protective suit. Specifically, an S-shaped flexible pipe can be used to absorb heat through contact with the human body.

[0061] Specifically, the protective suit body serves as a carrier for the cooling medium to come into contact with the human body, and its built-in cooling pipe 3 constitutes a closed-loop circulation system. After the dry ice absorbs the heat of the coolant in the storage chamber 11, it vaporizes. The generated gas pressure acts on the extrusion piston, pushing it to compress the elastic part and drive the sealing plug 23 out of the exhaust port. When the pressure is released, the elastic part resets the extrusion piston 22 back to its original position. At this time, the sealing plug 23 recloses the exhaust port 27, and the system enters the next cycle. The coolant flows along the pipeline under the action of the pressure difference, absorbs the heat of the human body, and then flows back to the cooling chamber 12, maintaining a low temperature state through continuous heat exchange with the dry ice. This mechanical linkage mechanism does not require external power, and uses the gas pressure generated by the phase change of dry ice to automatically drive the cycle.

[0062] Through the above technical solution, the present invention solves the bulky problem of liquid cooling systems caused by complex pumps, eliminates the safety hazards caused by liquid leakage, and achieves a continuous refrigeration cycle without an external power source. The physical process of dry ice phase change and vaporization ensures stable cooling efficiency and avoids performance degradation of semiconductor cooling in high and low temperature environments. The mechanical linkage structure simplifies the system control logic and enhances the reliability of the equipment under complex operating conditions.

[0063] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A dry ice driven circulating cooling system, characterized in that: include: The heat exchange device is provided with a storage chamber and a cooling chamber, wherein the storage chamber and the cooling chamber are close to each other; A drive device, comprising a drive device cylinder, an extrusion piston, a sealing plug, and an extrusion elastic member, wherein the extrusion piston is movably and sealingly connected to the drive device cylinder and divides the drive device cylinder into a drive chamber and an extrusion chamber, wherein the drive chamber is in communication with the storage chamber, and the extrusion chamber is in communication with the cooling chamber, and the drive chamber is provided with an exhaust port for exhausting gas. The sealing plug is connected to the piston, and the extrusion elastic member applies an elastic force to the extrusion piston and / or the sealing plug toward the side of the drive chamber; A cooling pipe connecting the cooling chamber and the extrusion chamber; Dry ice, located in the storage chamber; Cooling liquid circulates between the cooling chamber, the extrusion chamber and the cooling pipe; In the first working state, the elastic force of the extrusion elastic member forces the extrusion piston to remain in the first position, and the sealing plug seals the exhaust port; In the second working state, the gas generated by the heat exchange and sublimation of the dry ice in the storage chamber and the coolant in the cooling chamber drives the extrusion piston to overcome the elastic force of the extrusion elastic member and move from the first position to the second position, and the sealing plug is separated from the exhaust port.

2. The dry ice driven circulating cooling system according to claim 1, characterized in that: The extrusion elastic member is a compression spring, and the extrusion elastic member is installed in the extrusion cavity.

3. The dry ice driven circulating cooling system according to claim 1, characterized in that: The sealing plug is connected to the extrusion piston via a delay elastic member.

4. The dry ice driven circulating cooling system according to claim 1, characterized in that: The storage chamber is provided with a feeding port for adding dry ice.

5. The dry ice driven circulating cooling system according to claim 1, characterized in that: It also includes a pressure stabilizing device, which includes a pressure stabilizing device cylinder, a buffer piston and a buffer elastic member. The buffer piston is movably sealed and connected to the pressure stabilizing device cylinder to form a buffer cavity. The cooling tube is connected to the extrusion cavity through the buffer cavity. The buffer elastic member applies an elastic force to the buffer piston toward the side where the buffer cavity is located.

6. The dry ice driven circulating cooling system according to claim 5, characterized in that: A one-way valve is provided on the pipeline between the buffer chamber and the extrusion chamber.

7. The dry ice driven circulating cooling system according to claim 6, characterized in that: The buffer elastic member is a compression spring, and the buffer elastic member is installed on a side of the buffer piston away from the buffer cavity.

8. The dry ice driven circulating cooling system according to claim 1, characterized in that: The heat exchange device includes a first heat exchange device cylinder and a second heat exchange device cylinder arranged inside and outside. The inner cavity of the first heat exchange device cylinder is the storage cavity, and the annular cavity between the second heat exchange device cylinder and the first heat exchange device cylinder is the cooling cavity.

9. The dry ice driven circulating cooling system according to claim 8, characterized in that: The cylinder of the second heat exchange device is a heat-insulating cylinder.

10. An individual cooling garment, characterized in that: It comprises a protective suit body and the dry ice driven circulating cooling system according to any one of claims 1 to 9, wherein the cooling pipes are distributed in the protective suit body, and the coolant in the cooling pipes is used for heat exchange with the human body.

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