Phase change reinforced cold conduction device

Abstract

The utility model provides a phase change reinforced cold conduction device which comprises a rod body and a phase change cold storage device, a first cavity is formed in the rod body, and the first cavity is of a hollow sealing structure with a smooth middle core and two closed ends; the rod body is divided into a first section body, a second section body, a third section body and a fourth section body from bottom to top; a refrigerant is placed at the bottom in the first body cavity; and the outer wall of the second section body is coated with a heat insulation material. The phase change cold storage device is arranged on the outer wall of the third section in a sleeving mode, a second cavity is formed in the phase change cold storage device, and a phase change cold storage material is placed in the second cavity. The cold conduction device improves the cold conduction efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of frozen soil engineering, and particularly to a phase change enhanced heat conduction device. Background Art

[0002] At present, heat pipes have been widely used in frozen soil engineering. As a new and efficient heat transfer element, the working medium of the existing heat pipe is stored at the bottom of the heat pipe. The evaporation section is in the lower half of the heat pipe, the condensation section is in the upper half of the heat pipe, and the adiabatic section is in the middle. In the evaporation section, the refrigerant absorbs the heat supplied by the heat source and evaporates. The steam flows upward. After passing through the adiabatic section, the vaporization latent heat is released in the condensation section and condenses into a liquid. Due to the action of gravity, it flows back to the lower half evaporation section to complete a working cycle.

[0003] However, the heat conduction effect of the existing heat pipe structure depends on the temperature level change between the evaporation section and the condensation section, resulting in the phenomenon that it cannot work effectively in the warm season with serious frozen soil degradation. Summary of the Invention

[0004] Therefore, the present invention proposes a phase change enhanced heat conduction device, which utilizes the low-temperature phase change energy storage of the phase change energy storage device and the dual regulation of the condensation section and the enhanced condensation section, improving the regulation efficiency of the device for heat conduction.

[0005] To achieve the above object, on the one hand, the present invention proposes a phase change enhanced heat conduction device, comprising:

[0006] A rod body, with a first cavity formed inside, and the first cavity is a hollow sealed structure with a smooth core and closed ends at both ends;

[0007] The rod body is divided into a first section, a second section, a third section, and a fourth section from bottom to top;

[0008] Refrigerant is placed at the bottom of the first section cavity;

[0009] The outer wall of the second section is coated with heat insulation material;

[0010] A phase change energy storage device, sleeved on the outer wall of the third section, with a second cavity formed inside the phase change energy storage device, and phase change energy storage material is placed in the second cavity.

[0011] In one embodiment, heat dissipation fins are installed between the outer wall of the third section and the phase change energy storage device.

[0012] In one embodiment, heat dissipation fins are installed on the outer wall of the fourth section.

[0013] In one embodiment, the heat conduction device further comprises:

[0014] A heat insulation device, located outside the phase change energy storage device.

[0015] In one embodiment, the outer wall of the heat preservation device is coated with a heat insulation and refrigeration coating.

[0016] In one embodiment, the heat preservation device uses vacuum or heat preservation materials for heat insulation.

[0017] In one embodiment, the second section and the third section are integrally connected or bendably connected.

[0018] In one embodiment, the heat conduction device further includes a control device, which includes a controller and a first valve;

[0019] The first valve is arranged between the phase change cold storage device and the heat insulation and refrigeration coating, and is connected to the controller;

[0020] When the controller controls the first valve to open, the phase change cold storage device is in a phase change cold storage state;

[0021] When the controller controls the first valve to close, the temperature of the phase change cold storage device is lower than the surface temperature of the third section.

[0022] In one embodiment, the phase change cold storage device and / or the heat preservation device is a sealed structure composed of stainless steel or corrosion-resistant carbon steel.

[0023] In one embodiment, the rod body is made of carbon steel and its surface is coated with an anti-corrosion coating.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The phase change enhanced heat conduction device proposed in the new embodiment adds a phase change cold storage device on the basis of the existing heat rod to form a split heat conduction device. Using the phase change cold storage material of the phase change cold storage device, cold is stored by phase change at low temperature to provide low temperature conditions for continuous heat conduction, so as to improve the heat conduction efficiency.

[0026] In order to have a better understanding of the above and other aspects of the new type, the following specific embodiments are given and described in detail in conjunction with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 FIG. shows a schematic structural diagram of a phase change enhanced heat conduction device provided in Embodiment 1 of the present application;

[0028] Figure 2 FIG. shows a top view structural diagram of a phase change enhanced heat conduction device provided in Embodiment 1 of the present application;

[0029] Figure 3 FIG. shows a schematic structural diagram of a phase change enhanced heat conduction device provided in Embodiment 2 of the present application;

[0030] Figure 4 Shows a top view structural schematic diagram of the phase change energy storage device in the phase change enhanced heat conduction device provided according to Embodiment 3 of the present application when it is turned on;

[0031] Figure 5 Shows a schematic flow chart of the regulation method of the phase change enhanced heat conduction device provided according to an embodiment of the present application;

[0032] Among them, reference numerals:

[0033] 1: Rod body

[0034] 1a: First cavity

[0035] 10: Anti-corrosion coating

[0036] 11: First section body

[0037] 11a: Refrigerant

[0038] 12: Second section body

[0039] 12a: Thermal insulation material

[0040] 13: Third section body

[0041] 14: Fourth section body

[0042] 2: Phase change energy storage device

[0043] 21: Second cavity

[0044] 21a: Phase change energy storage material

[0045] 31, 32: Heat sinks

[0046] 4: Heat insulation and refrigeration coating

[0047] 5: Heat preservation device

[0048] 6: Control device

[0049] A: Evaporation section

[0050] B: Adiabatic section

[0051] C: Enhanced condensation section

[0052] D: Condensation section

[0053] S11 - S15: Steps. Detailed implementation manners

[0054] To make the objectives, solutions, and advantages of this application clearer, the present application will be further described in detail in conjunction with the accompanying drawings and specific embodiments. However, this should not be construed as limiting the scope of the above-mentioned subject matter of this application to the following embodiments only. Any technology implemented based on the content of this application falls within the scope of this application.

[0055] In this application, terms such as "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to this application.

[0056] Please refer to Figures 1 to 4 , Figure 1 FIG. 1 shows a schematic structural diagram of a phase change enhanced heat conduction device provided in Embodiment 1 of the present application; Figure 2 FIG. 2 shows a top view structural diagram of the phase change enhanced heat conduction device provided in Embodiment 1 of the present application; Figure 3 FIG. 3 shows a schematic structural diagram of a phase change enhanced heat conduction device provided in Embodiment 2 of the present application; Figure 4 FIG. 4 shows a top view structural diagram of the phase change energy storage device in the phase change enhanced heat conduction device provided in Embodiment 3 of the present application when it is opened.

[0057] Embodiment 1

[0058] As Figure 1 , Figure 2 shown in FIGS. 1 and 2, in this embodiment, the phase change enhanced heat conduction device at least includes a rod body 1 and a phase change energy storage device 2. Among them, a first cavity 1a is formed inside the rod body 1. The first cavity is a hollow sealed structure with a clear core in the middle and both ends closed. In addition, in this embodiment, the rod body 1 is divided into four parts from bottom to top: a first section 11, a second section 12, a third section 13, and a fourth section 14. Among them, a refrigerant 11a is placed at the bottom of the cavity of the first section 11 (i.e., the bottom of the first cavity). The hollow sealed structure is used to store the refrigerant and provide a convective heat transfer channel for the liquid-vapor phase conversion of the refrigerant. The outer wall of the second section 12 is coated with a heat insulating material 12a. The phase change energy storage device 2 is sleeved on the outer wall of the third section 13. The phase change energy storage device is a sealed structure composed of stainless steel or rust-proof carbon steel. A second cavity 21 is formed inside the phase change energy storage device 2. A phase change energy storage material 21a is placed in the second cavity 21. The phase change energy storage material stores cold energy and cools down during low-temperature phase change.

[0059] In this embodiment, on the basis of the existing heat rod, a phase change cold storage device is added. The heat conduction device uses the phase change cold storage material of the phase change cold storage device to store cold in a low-temperature phase change and provide low-temperature conditions for continuous heat conduction to improve the heat conduction efficiency. At the same time, the phase change cold storage device is detachably connected to the rod body to form a split heat conduction device, which has a simple structure and is convenient to disassemble.

[0060] In addition, in some embodiments, a refrigerant 11a can be placed at the bottom of the first-stage body 11 cavity (i.e., the bottom of the first cavity). Liquid ammonia can be used, but the present application is not limited thereto.

[0061] In some embodiments, the thermal insulation material of the thermal insulation material 12a includes aerogel, aluminum silicate fiber, polyurethane, etc., but the present application is not limited thereto.

[0062] In some embodiments, the phase change cold storage material 21a is composed of a single phase change material or multiple phase change materials with solid-liquid phase change. The phase change cold storage material stores cold and cools down during low-temperature phase change.

[0063] In addition, with further reference Figure 1 as shown in, in one embodiment, a heat sink 31 is further installed between the outer wall of the third-stage body 13 and the phase change cold storage device 2. The heat sink helps to dissipate heat.

[0064] In addition, with further reference Figure 1 as shown in, in one embodiment, a heat sink 32 is installed on the outer wall of the fourth-stage body 14.

[0065] In addition, with further reference Figure 1 as shown in, in one embodiment, the outer wall of the heat preservation device 5 is coated with a heat insulation and refrigeration coating 4. The heat insulation and refrigeration coating not only prevents the thermal disturbance of sunlight to the phase change cold storage material, but also plays a role in radiative cooling. In some embodiments, the heat insulation and refrigeration coating is a composite coating composed of a sunlight reflection material and a radiative cooling material. Among them: the sunlight reflection material includes TiO2, HfO2, Al, Ag, Cu, etc., and reduces the surface temperature of the heat rod by reflecting sunlight; the radiative cooling material includes SiO2, SiC, aluminum phosphate, phosphite, and metal oxides containing C element materials and Al2O3, etc., and performs radiative cooling through the atmospheric window region with a wavelength range of 8-13 μm. In addition, it should be noted that the present application is not limited to the materials of the heat insulation and refrigeration coating.

[0066] In addition, with further reference Figure 1As shown, in one embodiment, the heat insulation device 5 is specifically arranged between the heat insulation and refrigeration coating 4 and the outer wall of the phase change cold storage device 2, and the heat insulation device 5 uses vacuum or heat insulation materials for heat insulation. In this embodiment, the enhanced condensation section from inside to outside in the transverse heat transfer sequence is the third section body, the heat sink, the phase change cold storage device, the heat insulation device, and the heat insulation and refrigeration coating. The heat insulation device 5 can effectively control the heat interference of the daytime heat on the cold storage device, but also prevents the entry of the nighttime cold into the phase change cold storage device.

[0067] Among them, in this embodiment, a part of the first section body 11 constitutes the evaporation section A; a part of the second section body 12 constitutes the adiabatic section B; the corresponding parts of the third section body 13, the phase change cold storage device 2, the heat sink 31, the heat insulation device 5, and the heat insulation and refrigeration coating 4 constitute the enhanced condensation section C; the fourth section body 14 and the heat sink 32 constitute the condensation section D.

[0068] In practical applications, the permafrost is divided into the perennially frozen layer and the active layer from the bottom layer to the upper layer, and the active layer is covered with a fill layer. When the phase change enhanced heat conduction device is used in frozen soil engineering, the heat release and evaporation section A will be buried in the part of the perennially frozen layer of the permafrost to a height of 0.5 m below the active layer. The adiabatic section B is located at a height of more than 0.5 m in the active layer of the permafrost to the fill layer, and no heat exchange occurs in the adiabatic section. Both the enhanced condensation section C and the condensation section D are located in the atmospheric environment. The enhanced condensation section C uses the phase change cold storage material 21a placed in the second cavity 21 to perform phase change cold storage and cooling after the phase change temperature is lower than the permafrost temperature, providing low-temperature conditions for continuous heat conduction.

[0069] In addition, in this embodiment, heat sinks 31 are installed between the outer wall of the third section body 13 and the phase change cold storage device 2, and heat sinks 32 are installed on the outer wall of the fourth section body 14. The heat sinks help to dissipate heat. Specifically, when used in frozen soil engineering, the heat sinks can dissipate the heat from the permafrost area.

[0070] In addition, the outer wall of the heat insulation device 5 is coated with the heat insulation and refrigeration coating 4. The heat insulation and refrigeration coating uses the principles of heat reflection cooling and radiative cooling to not only prevent the thermal disturbance of sunlight on the phase change cold storage material but also play a role in radiative cooling.

[0071] First, in this embodiment, the enhanced condensation section does not rely on active drive refrigeration, but adopts a passive refrigeration control method. The phase change energy storage material, heat sink, heat preservation device, and heat insulation and refrigeration coating in the enhanced condensation section are used as passive methods to improve actual refrigeration. Phase change energy storage occurs horizontally in it, heat transfer occurs between phase change units, heat dissipation occurs through the heat sink, heat insulation is provided by the heat preservation device, and heat insulation and refrigeration are achieved by the heat insulation and refrigeration coating. The low-temperature cold energy is conducted through the heat insulation and refrigeration coating to the phase change energy storage material in the phase change energy storage cavity, promoting the phase change energy storage of the phase change energy storage material. Moreover, while introducing external low-temperature cold energy, the "cold energy" storage process of the phase change device is adjusted, that is, the effect of enhanced cold conduction is achieved, so as to solve the problem of engineering diseases caused by uneven spatial and temporal distribution and discontinuous temporal distribution of cold conduction to a certain extent. Specifically:

[0072] At night, when the atmospheric temperature drops to the phase change temperature of the phase change energy storage material, the phase change energy storage material undergoes phase change energy storage, and at the same time, the radiative cooling material radiates heat to the surroundings for cooling. Finally, the temperature of the outer wall of the enhanced condensation section drops until it is lower than the phase change temperature of the phase change energy storage material. At this time, the largest temperature difference is formed between the temperature of the enhanced condensation section and the evaporation section, improving the actual cold conduction power of the device.

[0073] During the day, on the one hand, the heat insulation and refrigeration coating cools the surface through the high reflectivity of the heat-reflecting material to sunlight, and on the other hand, uses the radiative cooling material to perform radiative cooling during the atmospheric window period in a certain wavelength band; at the same time, the heat preservation device further prevents heat from interfering with the phase change energy storage device, making the temperature of the outer wall of the enhanced condensation section remain almost unchanged. At the same time, the temperature difference formed between the outer wall temperature of the enhanced condensation section and the outer wall temperature of the evaporation section is greater than the working temperature difference for the device to start. The heat of the evaporation section is transferred to the phase change energy storage material in the phase change energy storage cavity, promoting the phase change endotherm of the phase change energy storage material. When the atmospheric temperature drops, the phase change energy storage material releases heat for energy storage, and the released heat is dissipated through heat conduction between storage units, heat sinks, heat preservation devices, and heat radiation of the radiative cooling material.

[0074] In the cold season, due to the influence of factors such as atmospheric temperature, the condensation section cannot reach the working temperature difference for the device to start, and the working time is discontinuous. The actual working time is about 2 / 3 of the working cycle; in addition, in the early and late cold seasons, the device will be at the starting working temperature difference for a short time or cannot reach the working temperature difference for the device to start, resulting in low efficiency of utilization or non-working. In response, the enhanced condensation section in this embodiment stores sufficient cold energy at low temperature phase change, which can not only solve the limitations of discontinuous working time and low actual efficiency of the device in the cold season, but also provide the time for the starting working temperature difference for the device to work in the early and late cold seasons, improving the actual cold conduction efficiency and working duration. In the warm season, the enhanced condensation section utilizes the large temperature difference between day and night on the plateau. When the night temperature drops to the phase change temperature, the phase change energy storage material undergoes phase change energy storage, realizing the reverse transfer of the internal heat of the permafrost back to the atmospheric environment and controlling the temperature rise of the permafrost in real time.

[0075] Therefore, by using the enhanced condensation section in this embodiment to store sufficient cold energy through low-temperature phase change, it can not only solve the limitations of the discontinuous working time and low actual efficiency of the heat rod in the cold season, but also provide the working temperature difference time for the device to work in the early and late cold seasons, improving the actual heat conduction efficiency and working duration. In the warm season, the enhanced condensation section utilizes the large temperature difference between day and night on the plateau. When the night temperature drops to the phase change temperature, the phase change cold storage material undergoes phase change cold storage, realizing the reverse transfer of the internal heat of the permafrost back to the atmospheric environment and controlling the increase of the permafrost temperature in real time.

[0076] Second, in this embodiment, through the dual temperature difference effect of the evaporation section, the enhanced condensation section, and the condensation section, the heat of the frozen soil layer is transmitted to the atmospheric environment in the vertical direction, further improving the heat regulation efficiency of the device. Specifically, when the temperature difference between the outer wall temperature of the evaporation section and the outer wall temperature of the enhanced condensation section (i.e., the first temperature difference) meets the working temperature difference for the device to start, or when the temperature difference between the outer wall temperature of the evaporation section and the outer wall temperature of the condensation section (i.e., the second temperature difference) meets the working temperature difference for the device to start, the refrigerant in the evaporation section absorbs the heat from the permafrost layer and evaporates to form steam, which rises towards the enhanced condensation section or the condensation section. The steam is liquefied and cooled to dissipate heat in the enhanced condensation section or the condensation section, and the formed liquid flows back to the evaporation section under the action of its own weight. In addition, the evaporation section regulates the temporal and spatial distribution of heat through low-temperature phase change.

[0077] In this embodiment, when the outer wall temperature of the condensation section is lower than the outer wall temperature of the enhanced condensation section, the heat of the evaporation section is first dissipated by consuming the cold storage capacity of the enhanced condensation section; when the outer wall temperature of the condensation section is lower than the outer wall temperature of the enhanced condensation section, the heat of the evaporation section is first dissipated through the condensation section.

[0078] In addition, in some embodiments, the material of the rod body 1 is carbon steel, and the surface is coated with an anti-corrosion coating 10, which prevents the corrosion of the carbon steel by moisture and ions.

[0079] Embodiment 2

[0080] As Figure 3As shown in the figure, in this embodiment, the phase change enhanced heat conduction device at least includes a rod body 1 and a phase change heat storage device 2. Among them, a first cavity 1a is formed inside the rod body 1, and the first cavity is a hollow sealed structure with a clear core and closed ends. In addition, in this embodiment, the rod body 1 is divided into four parts from bottom to top: a first section 11, a second section 12, a third section 13, and a fourth section 14. Among them, a refrigerant 11a is placed at the bottom of the cavity of the first section 11 (i.e., the bottom of the first cavity), and the hollow sealed structure is used to store the refrigerant and provide a convective heat transfer channel for the liquid-gas phase conversion of the refrigerant. The outer wall of the second section 12 is coated with a heat insulating material layer 12a. The phase change heat storage device 2 is sleeved on the outer wall of the third section 13. A second cavity 21 is formed inside the phase change heat storage device 2, and a phase change heat storage material 21a is placed in the second cavity 21. The phase change heat storage material stores cold and cools down during low-temperature phase change.

[0081] In one embodiment, a heat sink 31 is also installed between the outer wall of the third section 13 and the phase change heat storage device 2, and the heat sink helps to dissipate heat. In one embodiment, heat sinks 32 are installed on the outer wall of the fourth section 14.

[0082] In addition, further referring to Figure 3 As shown in the figure, in one embodiment, an insulating and refrigerating coating 4 is coated on the outer wall of the heat preservation device 5.

[0083] In addition, further referring to Figure 3 As shown in the figure, in one embodiment, the heat preservation device 5 is located between the insulating and refrigerating coating 4 and the outer wall of the phase change heat storage device 2. The heat preservation device 5 uses vacuum or heat insulating materials for heat insulation. The heat preservation device 5 can effectively prevent the heat interference of the heat storage device during the day, but also prevent the entry of cold at night into the phase change heat storage device.

[0084] The difference from the above-mentioned first embodiment is that in this embodiment, the second section 12 and the third section 13 are integrally connected or bendably connected. Figure 3 The figure shows the case of the bendable connection between the second section 12 and the third section 13. Thus, when the heat slow-release heat conduction device is used in frozen soil engineering, it is convenient for the phase change enhanced heat conduction device to be flexibly installed and applied in frozen soil.

[0085] In addition, in this embodiment, the working principle of the phase change enhanced heat conduction device is the same as that of the first embodiment, and this embodiment will not be elaborated here.

[0086] Embodiment Three

[0087] Referring to Figure 1 And Figure 4 As shown in the figure, and Figure 1The structure of the phase change enhanced heat conduction device provided in the first embodiment is similar. In this embodiment, the phase change enhanced heat conduction device also includes at least a rod body 1 and a phase change energy storage device 2. Among them, a first cavity 1a is formed inside the rod body 1, and the first cavity is a hollow sealed structure with a clear core in the middle and closed at both ends. In addition, in this embodiment, the rod body 1 is divided into four parts from bottom to top: the first section 11, the second section 12, the third section 13, and the fourth section 14. Among them, a coolant 11a is placed at the bottom of the cavity of the first section 11 (i.e., the bottom of the first cavity), and the hollow sealed structure is used to store the refrigerant and provide a convective heat transfer channel for the liquid-vapor phase conversion of the refrigerant. The outer wall of the second section 12 is coated with a heat insulation material 12a. The phase change energy storage device 2 is sleeved on the outer wall of the third section 13. A second cavity 21 is formed inside the phase change energy storage device 2, and a phase change energy storage material 21a is placed in the second cavity 21. The phase change energy storage material stores cold energy and cools down during low-temperature phase change.

[0088] In one embodiment, a heat sink 31 is also installed between the outer wall of the third section 13 and the phase change energy storage device 2. The heat sink helps to dissipate heat. In one embodiment, heat sinks 32 are installed on the outer wall of the fourth section 14.

[0089] In addition, in one embodiment, the outer wall of the heat preservation device 5 is coated with a heat insulation and refrigeration coating 4.

[0090] In addition, in one embodiment, the heat preservation device 5 is located between the heat insulation and refrigeration coating 4 and the outer wall of the phase change energy storage device 2. The heat preservation device 5 uses vacuum or heat insulation materials for heat insulation. The heat preservation device 5 can effectively control the heat interference of the daytime heat on the energy storage device, but also prevents the cold energy at night from entering the phase change energy storage device.

[0091] In addition, refer to Figure 4 as shown in Figure 4The sectional top view structural schematic diagram of the phase change enhanced heat conduction cooling device with timed activation is shown. Different from the above-mentioned Embodiment 1 and Embodiment 2, in this embodiment, the phase change enhanced heat conduction cooling device further includes a control device 6, and the control device includes a controller and a first valve. The first valve is arranged between the phase change cold storage device and the heat insulation and refrigeration coating and is connected to the controller. When the controller controls the first valve to open, the phase change cold storage device is in the phase change cold storage state. When the controller controls the first valve to close, the temperature of the phase change cold storage device is lower than the surface temperature of the first section (i.e., the evaporation section). In specific practical applications, in this embodiment, the controller can be provided with a timer, with a 12-hour cycle control period. During the 12 hours of the day, the first valve is closed, and the phase change cold storage device is in a state where its temperature is lower than the temperature of the evaporation section of the heat pipe. The heat insulation and refrigeration coating 4 and the heat preservation device 5 perform heat insulation. During the 12 hours of the night, the first valve is opened, and the phase change cold storage device starts to enter the phase change cold storage state to provide a cold quantity channel. Compared with Embodiment 1 and Embodiment 2, this embodiment uses the timed opening and closing of the phase change cold storage device to provide a channel for the entry of night cold quantity into the phase change cold storage device.

[0092] In addition, in some embodiments, temperature sensors can also be provided on the evaporation section, adiabatic section, enhanced condensation section, condensation section, etc. of the device to monitor the outer wall temperature of each section in real time.

[0093] In addition, referring to Figure 5 as shown in, on the other hand, the present application also provides a regulation method for a phase change enhanced heat conduction cooling device, where Figure 5 the flow schematic diagram of the regulation method of an embodiment is shown. The regulation method at least includes:

[0094] S11. Determine the first temperature difference based on the difference between the outer wall temperature of the evaporation section and the outer wall temperature of the enhanced condensation section collected;

[0095] S12. Determine the second temperature difference based on the difference between the outer wall temperature of the evaporation section and the outer wall temperature of the condensation section collected;

[0096] S13. Determine the total sum of the first heat transfer resistances based on the sum of the heat conduction resistance from the outer wall to the inner wall of the evaporation section, the evaporation heat transfer resistance on the inner surface of the evaporation section, the heat conduction resistance from the inner wall to the outer wall of the enhanced condensation section, the condensation heat transfer resistance on the inner surface of the enhanced condensation section, and the heat transfer resistance between the outer wall of the enhanced condensation section and the air;

[0097] S14. Determine the total sum of the second heat transfer resistances based on the sum of the heat conduction resistance from the outer wall to the inner wall of the evaporation section, the evaporation heat transfer resistance on the inner surface of the evaporation section, the heat conduction resistance from the inner wall to the outer wall of the condensation section, the condensation heat transfer resistance on the inner surface of the condensation section, and the heat transfer resistance between the outer wall of the condensation section and the air;

[0098] S15. Determine the heat transfer of the device based on the first temperature difference, the second temperature difference, the total first heat transfer resistance, and the total second heat transfer resistance. Among them:

[0099] If both the first temperature difference and the second temperature difference are greater than or equal to the working temperature difference, the heat transfer of the device is the sum of the ratio of the first temperature difference to the total first heat transfer resistance and the ratio of the second temperature difference to the total second heat transfer resistance. If the first temperature difference is greater than or equal to the working temperature difference and the second temperature difference is less than the working temperature difference, the heat transfer of the device is the ratio of the first temperature difference to the total first heat transfer resistance. If the second temperature difference is greater than or equal to the working temperature difference and the first temperature difference is less than the working temperature difference, the heat transfer of the device is the ratio of the second temperature difference to the total second heat transfer resistance. If both the first temperature difference and the second temperature difference are less than the working temperature difference, the heat transfer of the device is zero. That is:

[0100]

[0101] Among them, the total first heat transfer resistance ∑R i ' = R1 + R2 + R3' + R'4 + R5', and the total second heat transfer resistance ∑R i = R1 + R2 + R3 + R4 + R5; the conduction heat transfer resistance from the outer wall to the inner wall of the evaporation section is R1, the evaporation heat transfer resistance on the inner surface of the evaporation section is R2, the conduction heat transfer resistance from the inner wall to the outer wall of the condensation section is R3, the condensation heat transfer resistance on the inner surface of the condensation section is R4, the heat transfer resistance between the outer wall of the condensation section and the air is R5, the conduction heat transfer resistance from the inner wall to the outer wall of the enhanced condensation section is R3', the condensation heat transfer resistance on the inner surface of the enhanced condensation section is R'4, and the heat transfer resistance between the outer wall of the enhanced condensation section and the air is R5'; the outer wall temperature of the enhanced condensation section is T2, the outer wall temperature of the evaporation section is T3, the outer wall temperature of the condensation section is T1, the first temperature difference is T3 - T2, the second temperature difference is T3 - T1, and the working temperature difference ΔT for device startup. At this time, the annual cooling capacity of the phase change enhanced heat conduction cooling device is The t1 section is the starting time of the heat conduction cooling device for refrigeration, and the t1 section is the ending time of the heat conduction cooling device for refrigeration.

[0102] In addition, in the regulation methods of the above two embodiments, it further includes: determining the phase change energy storage material parameters of the enhanced condensation section based on the first temperature difference and the total first heat transfer resistance.

[0103] Among them, the phase change energy storage material parameters include the doping amount and phase change latent heat of the phase change energy storage material, the phase change temperature and supercooling temperature of the phase change energy storage material, etc. Specifically, the doping amount of the phase change energy storage material in the enhanced condensation section is expressed as:

[0104]

[0105] Among them, H is the phase change latent heat of the phase change energy storage material, and m is the doping amount of the phase change energy storage material.

[0106] In some embodiments, the phase change temperature of the phase change cold storage material is less than -1.5 °C, and the supercooling temperature is less than 2 °C, but the present application is not limited thereto.

[0107] In summary, the phase change cold storage and heat conduction device provided by the present application utilizes the principles of low-temperature phase change energy storage, heat reflection cooling, and radiative cooling to regulate the temperature by strengthening the heat changes in the condensation section, the condensation section and the evaporation section. The phase change cold storage material in the phase change cold storage device stores cold energy through low-temperature phase change, providing low-temperature conditions for continuous heat conduction; an insulating and refrigerating coating is provided on the outer layer of the heat preservation device, which not only prevents the thermal disturbance of sunlight to the phase change cold storage material, but also plays a role in radiative cooling. The device improves the regulation efficiency of the device for heat conduction. In addition, the evaporation section and the strengthened condensation section of the present application do not rely on resources such as solar energy and wind energy, which not only have the advantages of energy conservation, low carbon, and environmental protection, but also provide new ideas for frozen soil engineering in seasons or regions where resources such as solar energy and wind energy are scarce.

[0108] In conclusion, although the present application has been disclosed above in embodiments, it is not intended to limit the present application. Those of ordinary skill in the technical field to which the present application pertains can make various changes and modifications without departing from the spirit and scope of the present application. Therefore, the protection scope of the present application is defined by the scope of the patent application.

Claims

1. A phase change enhanced cooling device, characterized in that: Include: A rod body, a first cavity is formed inside, and the first cavity is a hollow sealed structure with a smooth center and closed at both ends; The rod body is divided into a first section body, a second section body, a third section body and a fourth section body from bottom to top; A refrigerant is placed at the bottom of the first body cavity; The outer wall of the second section is coated with a heat insulating material; A phase-change cold storage device is sleeved on the outer wall of the third section body, a second cavity is formed inside the phase-change cold storage device, and a phase-change cold storage material is placed in the second cavity.

2. The phase change enhanced cooling device according to claim 1, characterized in that: A heat sink is installed between the outer wall of the third section and the phase-change cold storage device.

3. The phase change enhanced cooling device according to claim 1, characterized in that: The outer wall of the fourth section body is provided with a heat sink.

4. The phase change enhanced cooling device according to claim 1, characterized in that: Also includes: A heat preservation device is located outside the phase change cold storage device.

5. The phase change enhanced cooling device according to claim 4, characterized in that: The outer wall of the heat preservation device is coated with a heat insulation and refrigeration coating.

6. The phase change enhanced cooling device according to claim 4, characterized in that: The heat-insulating device is heat-insulated by vacuum or heat-insulating materials.

7. The phase change enhanced cooling device according to claim 1, characterized in that: The second section body and the third section body are connected in an integral manner or in a bendable manner.

8. The phase change enhanced cooling device according to claim 5, characterized in that: Also includes a control device, the control device includes a controller and a first valve; The first valve is disposed between the phase change cold storage device and the heat insulation refrigeration coating, and is connected to the controller; When the controller controls the first valve to open, the phase-change cold storage device is in a phase-change cold storage state; When the controller controls the first valve to be closed, the temperature of the phase-change cold storage device is lower than the surface temperature of the third segment.

9. The phase change enhanced cooling device according to claim 4, characterized in that: The phase-change cold storage device and / or the heat preservation device are sealed structures made of stainless steel or anti-corrosion carbon steel.

10. The phase change enhanced cooling device according to claim 1, characterized in that: The rod body is made of carbon steel, and the surface is coated with an anti-corrosion coating.

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