Method for setting operating parameters of immersion phase change machine

Abstract

The present invention provides an operating parameter setting method for an immersion phase change machine. First, a heating module is set in a closed space of an immersion phase change machine; then, the heating module is controlled to operate at a preset power; then, a working fluid is injected into the closed space at an initial filling rate, and a first initial steady-state equilibrium temperature is detected and recorded; then, the initial filling rate is successively added with a variable filling rate to define a plurality of different experimental filling rates, and the working fluid is injected into the closed space at an increasing experimental filling rate, and a plurality of first experimental steady-state equilibrium temperatures are detected and recorded; finally, a first minimum steady-state equilibrium temperature is selected from the first initial steady-state equilibrium temperature and the first experimental steady-state equilibrium temperature, and the corresponding one of the initial filling rate and the experimental filling rate is defined as an optimal filling rate.

Description

Technical Field

[0001] The present invention relates to an operation parameter setting method, and in particular to an operation parameter setting method for an immersion phase change machine. Background Art

[0002] With the continuous development of electronic technology, CPU integration, miniaturization and performance improvement, power consumption has increased dramatically. Heat dissipation has become one of the main factors restricting the development of computers. Therefore, how to efficiently dissipate CPU heat has become an urgent problem to be solved.

[0003] Currently, the more mature heat dissipation methods for electronic components include air cooling, liquid cooling or heat pipe cooling technology. However, traditional heat dissipation methods have certain problems in solving the high-power applications of CPUs by today's users. Limited by the material properties and heat dissipation specific surface area of ​​the radiator itself, when the CPU power increases, the heat flux density is very high, causing the CPU to be unable to be reduced to the required temperature. Excessive temperature will reduce the operating speed of the CPU, and it is even easy to burn out at high temperatures, greatly affecting the user experience.

[0004] As mentioned above, cooling methods such as natural convection and forced convection that use air for heat dissipation are far from meeting the heat dissipation requirements of existing high-power CPUs. Although liquid cooling and heat pipe cooling technologies have good temperature uniformity, when the heat dissipation is large, the cooling liquid and air cannot take away the heat in time, causing the heat to continue to accumulate in the radiator.

[0005] In order to achieve an ideal heat dissipation effect, a method with better heat dissipation effect is needed to solve the heat dissipation problem of the CPU. In particular, as the size of the CPU is getting smaller and smaller, the contact area of ​​the CPU is extremely limited. Whether it is air cooling, liquid cooling or heat pipe cooling, it is impossible to effectively remove the heat of the CPU. Therefore, the prior art has developed an immersion cooling technology, which mainly immerses the CPU in cooling liquid to remove the heat through direct contact. However, since immersing the CPU in cooling liquid can have a significant effect, general users have little research on the parameter setting of the immersion cooling technology, resulting in the inability to effectively and fully utilize the immersion cooling technology. Summary of the invention

[0006] In view of the fact that in the prior art, general users have little knowledge of the parameter setting of the immersion cooling technology and simply immerse the CPU in the cooling liquid for cooling, which is unable to effectively exert the effect of the immersion cooling technology; therefore, the main purpose of the present invention is to provide an operating parameter setting method for an immersion phase change machine, which can effectively find the operating parameter setting of the immersion phase change machine, thereby improving the cooling effect.

[0007] The present invention solves the problems of the prior art and adopts a necessary technical means to provide an operating parameter setting method for an immersion phase change machine, comprising the following steps (A) to (M).

[0008] First, step (A) is to place a heating module for simulating the heating of a working element in a closed space of an immersion phase change machine, and the working element generates operating heat energy when operating.

[0009] Step (B) is to control the heating module to operate at a preset power so that the heating module emits simulated heat energy that simulates operating heat energy.

[0010] Step (C) is to inject a working fluid into the enclosed space at an initial filling rate, and detect and record a first initial steady-state equilibrium temperature of the heating module.

[0011] Step (D) is to add a variable filling rate to the initial filling rate in succession to define a plurality of different experimental filling rates, and inject the working fluid into the enclosed space with increasing experimental filling rates to correspondingly perform multiple detections and record a plurality of first experimental steady-state equilibrium temperatures of the heating module.

[0012] Step (E) is to select a first minimum steady-state equilibrium temperature from the first initial steady-state equilibrium temperature and the first experimental steady-state equilibrium temperature, and define the one of the initial filling rate and the experimental filling rate corresponding to the first minimum steady-state equilibrium temperature as an optimal filling rate.

[0013] In an auxiliary technical means derived from the above necessary technical means, the following steps (F) to (I) are also included after step (E). Step (F) is to inject the working fluid into the enclosed space at an optimal filling rate. Step (G) is to start an air-cooled heat dissipation module that is thermally connected to the enclosed space at a first initial speed, and detect and record a second initial steady-state equilibrium temperature of the working element. Step (H) is to add a first variable speed to the first initial speed in sequence to define a plurality of different first experimental speeds, and to dissipate the enclosed space with the air-cooled heat dissipation module at a gradually changing first experimental speed, so as to correspondingly perform multiple detections and records of multiple second experimental steady-state equilibrium temperatures of the working element. Step (I) is to select a second lowest steady-state equilibrium temperature from the second initial steady-state equilibrium temperature and the second experimental steady-state equilibrium temperature, and define the one of the first initial speed and the first experimental speed that corresponds to the second lowest steady-state equilibrium temperature as a first optimal speed.

[0014] Preferably, when the working fluid is injected into the enclosed space and reaches an initial filling rate, the heating module is immersed in the working fluid; and the first initial rotation speed is 0 rpm.

[0015] In an auxiliary technical means derived from the above necessary technical means, the following steps (J) to (M) are also included after step (I). Step (J) is to evacuate the enclosed space to a preset pressure. Step (K) is to start the air-cooling heat dissipation module at a second initial rotation speed to detect and record a third initial steady-state equilibrium temperature of the working element. Step (L) is to add a second variable rotation speed to the second initial rotation speed in sequence to define a plurality of different second experimental rotation speeds, and to dissipate heat from the enclosed space with the air-cooling heat dissipation module at a gradually varying second experimental rotation speed, so as to correspondingly perform multiple detections and records of a plurality of third experimental steady-state equilibrium temperatures of the working element. Step (M) is to select a third lowest steady-state equilibrium temperature from the third initial steady-state equilibrium temperature and the third experimental steady-state equilibrium temperature, and define the one of the second initial rotation speed and the second experimental rotation speed corresponding to the third lowest steady-state equilibrium temperature as a second optimal rotation speed.

[0016] Preferably, the preset pressure is 0.055 MPa; and the second initial rotation speed is 0 rpm.

[0017] The operating parameter setting method of the immersion phase change machine of the present invention mainly utilizes the heating module to simulate the heat energy generated when the working element is in operation, and then injects the working fluid into the enclosed space at the initial filling rate, and injects the working fluid into the enclosed space at the increasing experimental filling rate, and then obtains the best filling rate from the lowest temperature detected, so as to effectively allow the user to obtain the filling rate that is most suitable for the working fluid. Compared with the prior art method of only immersing the working element in the working fluid, the present invention can indeed more effectively exert the cooling effect of the immersion cooling technology.

[0018] The specific embodiments of the present invention will be further described by the following embodiments and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a three-dimensional schematic diagram showing an immersion phase change machine to which the method for setting operating parameters of the immersion phase change machine provided by a preferred embodiment of the present invention is applied;

[0020] Figure 2 is a three-dimensional exploded schematic diagram showing an immersion phase change machine;

[0021] Figure 3 is a three-dimensional exploded schematic diagram showing another perspective of the immersion phase change machine;

[0022] Figure 4 Is for Figure 1 AA cross-sectional diagram of ;

[0023] Figure 5A and Figure 5B A flowchart of the steps of the method for setting the operating parameters of the immersion phase change machine provided in the preferred embodiment of the present invention;

[0024] Figure 6 is a schematic diagram showing the cyclic evaporation and condensation of the working fluid in the immersion phase change machine;

[0025] Figure 7 It shows the liquid level height corresponding to different filling rates of the working fluid in the immersion phase change machine; and

[0026] Figure 8 It is a graph showing the changes in temperature and air pressure at different fan speeds.

[0027] 100: immersion phase change machine;

[0028] 1: Chassis body;

[0029] 11: bottom plate;

[0030] 12: first side panel;

[0031] 121: Pipeline connection assembly;

[0032] 1211: liquid delivery pipe;

[0033] 13: second side panel;

[0034] 14: front frame plate;

[0035] 141: front opening;

[0036] 15: back panel;

[0037] 2: Heating module;

[0038] 21: heating sheet;

[0039] 3: Perspective window;

[0040] 4: Heat dissipation components;

[0041] 41: cover plate body;

[0042] 42: medial fin;

[0043] 43: Outer fin;

[0044] 5: Air cooling module;

[0045] h1: initial height;

[0046] h2-h5: experimental height;

[0047] OP: upper opening;

[0048] CS: confined space;

[0049] WF: working fluid;

[0050] T1, T2, T3, T4: curve;

[0051] S101-S107: steps. DETAILED DESCRIPTION

[0052] See also Figures 1 to 4 , Figure 1 is a three-dimensional schematic diagram showing an immersion phase change machine to which the method for setting operating parameters of the immersion phase change machine provided by a preferred embodiment of the present invention is applied; Figure 2 is a three-dimensional exploded schematic diagram showing an immersion phase change machine; Figure 3 is a three-dimensional exploded schematic diagram showing another perspective of the immersion phase change machine; Figure 4 Is for Figure 1 AA cross-section diagram of .

[0053] As shown in Figure 1 Figure 4 As shown, an immersion phase change machine 100 includes a chassis body 1 , a heat generating module 2 , a perspective window 3 , a heat dissipation element 4 and an air-cooling heat dissipation module 5 .

[0054] The chassis body 1 has a bottom plate 11, a first side plate 12, a second side plate 13, a front frame plate 14 and a back plate 15. The first side plate 12, the second side plate 13, the front frame plate 14 and the back plate 15 are respectively connected to the bottom plate 11 in an integral manner, and the two sides of the first side plate 12 and the second side plate 13 are respectively connected to the two sides of the front frame plate 14 and the back plate 15 in an integral manner; wherein the front frame plate 14 has a front opening 141, and the first side plate 12, the second side plate 13, the front frame plate 14 and the back plate 15 also surround an upper opening OP.

[0055] As mentioned above, the first side plate 12 has a pipe connection assembly 121 , and the pipe connection assembly 121 is used to connect a liquid extraction pump (not shown) and a vacuum pump (not shown).

[0056] The heating module 2 is disposed on the bottom plate 11 to generate heat energy. In this embodiment, the heating module 2 includes a plurality of heating sheets 21 (only one is shown in the figure), and each heating sheet 21 is further provided with a temperature sensor (not shown) to measure the temperature of each heating sheet 21. In addition, in practice, the temperature sensor can be fixed to the surface of the heating sheet 21 by gluing, or fixed to the surface of the heating sheet 21 by magnet adsorption.

[0057] The perspective window 3 is sealed and fixed to the front opening 141 of the front frame plate 14. The heat dissipation assembly 4 is sealed and fixed to the upper opening OP, so that the bottom plate 11, the first side plate 12, the second side plate 13, the front frame plate 14, the back plate 15, the perspective window 3 and the heat dissipation assembly 4 form a closed space CS. The user can see the situation in the closed space CS through the front opening 141.

[0058] In addition, the heat dissipation assembly 4 further includes a cover body 41, a plurality of inner fins 42 (only one is marked in the figure) and a plurality of outer fins 43 (only one is marked in the figure), wherein the inner fins 42 are disposed on the inner side of the cover body 41 and extend into the enclosed space CS when the cover body 41 is sealed and fixed to the upper opening OP. The outer fins 43 are disposed on the outer side of the cover body 41 opposite to the inner fins 42 and are thermally connected to the inner fins 42 through the cover body 41.

[0059] The above-mentioned pipeline connection assembly 121 is further provided with a liquid delivery pipe 1211 extending to the bottom plate 11 in the closed space CS.

[0060] The air-cooling heat dissipation module 5 is disposed on the outer fins 43 to provide heat dissipation airflow toward the outer fins 43 to accelerate heat dissipation.

[0061] Please continue reading FIG. 5A to FIG. 7 , Figure 5A and Figure 5B A flowchart of the steps of the method for setting the operating parameters of the immersion phase change machine provided in the preferred embodiment of the present invention; Figure 6 is a schematic diagram showing the cyclic evaporation and condensation of the working fluid in the immersion phase change machine; Figure 7 It shows the liquid level height corresponding to different filling rates of the working fluid in the immersion phase change machine.

[0062] like Figures 1 to 7 As shown, a method for setting operating parameters of an immersion phase change machine includes the following steps S101 to S113.

[0063] Step S101 is to place a heating module 2 for simulating the heating of a working element in a closed space CS of an immersion phase change machine 100, and the working element generates operating heat when operating. The working element is, for example, a central processing unit (CPU) or a motherboard with a central processing unit. In this embodiment, the heating module 2 is provided with a plurality of heating sheets 21 to simulate a plurality of processors installed in a server.

[0064] Step S102 is to control the heating module 2 to operate at a preset power, so that the heating module 2 emits simulated heat energy that simulates the operating heat energy. The purpose of the heating module 2 operating at the preset power is to simulate the operating heat energy generated when the working element operates, and the heating plate 21 of this embodiment is a ceramic heating plate, so the preset power and the operating power of the working element may not be the same, but the simulated heat energy generated by the heating module 2 will be close to the operating heat energy generated when the working element operates.

[0065] Step S103 is to inject a working fluid WF into the closed space CS at an initial filling rate, and detect and record a first initial steady-state equilibrium temperature of the heating module 2. The calculation of the filling rate is based on the closed space CS. When the working fluid WF is not injected into the closed space CS, the filling rate is 0%. When the working fluid WF fills the entire closed space CS, the filling rate reaches 100%, and the initial filling rate of this embodiment is 20%. It should be noted that the working fluid WF of this embodiment is a fluorinated liquid, such as 3M's product FC-72, which is a colorless, transparent, perfluorinated liquid with a boiling point of 56°C.

[0066] In addition, after the heating module 2 generates simulated thermal energy, the working fluid WF will absorb heat and boil when the temperature reaches 56°C. At this time, the working fluid WF will absorb a large amount of heat and change from liquid to gas. When the gaseous working fluid WF rises and exchanges heat with the inner fins 42, it will gradually cool and re-condense into liquid working fluid WF, and flow back to the working fluid WF at the bottom of the closed space CS. In this way, the working fluid WF can continuously circulate between the liquid and gas states, and can effectively take away the simulated thermal energy generated by the heating module 2.

[0067] The heat energy absorbed by the inner fins 42 during the heat exchange with the gaseous working fluid WF is transferred to the outer fins 43 through the cover body 41 for heat dissipation. Therefore, when the air-cooling heat dissipation module 5 is in operation, the cooling rate of the gaseous working fluid WF can be accelerated.

[0068] Step S104 is to add a variable filling rate to the initial filling rate to define a plurality of different experimental filling rates, and inject the working fluid into the closed space with the increasing experimental filling rate to detect and record the first experimental steady-state equilibrium temperatures of the heating module. In this embodiment, since the initial filling rate is 20% and the variable filling rate is 2%, the experimental filling rate is 22%, 24%, 26%... and keeps increasing. In this embodiment, the increment is only preset to 60%, and the first experimental steady-state equilibrium temperatures correspond to each experimental filling rate.

[0069] As mentioned above, when the working fluid WF is injected into the confined space CS and reaches the initial filling rate, the height of the working fluid WF in the confined space CS will reach an initial height h1 that is higher than the height of the heating module 2 in the confined space CS, so that the entire heating module 2 is immersed in the working fluid WF, and when the working fluid WF is injected into the confined space CS and reaches multiple experimental filling rates, it will gradually reach multiple experimental heights h2 to h5 (only four are shown as an example in the figure, and in fact, one experimental height will be generated for every 2% variation in filling rate).

[0070] Step S105 is to select a first minimum steady-state equilibrium temperature from the first initial steady-state equilibrium temperature and the first experimental steady-state equilibrium temperature, and define the one of the initial filling rate and the experimental filling rate corresponding to the first minimum steady-state equilibrium temperature as an optimal filling rate. In addition, although in step S104, the experimental filling rate is preset to increase to 60%, since step S105 selects the first minimum steady-state equilibrium temperature from the first initial steady-state equilibrium temperature corresponding to the initial filling rate and the experimental filling rate and the first experimental steady-state equilibrium temperature, once the first minimum steady-state equilibrium temperature appears, the process can be stopped even if the experimental filling rate does not reach the preset 60%.

[0071] Step S106 is to inject the working fluid WF into the closed space at an optimal filling rate. In this embodiment, the optimal filling rate is, for example, 20% of the initial filling rate.

[0072] Step S107 starts an air-cooling heat dissipation module thermally connected to the enclosed space at a first initial rotation speed, and detects and records a second initial steady-state equilibrium temperature of the heat generation module 2 .

[0073] In step S108, the first initial rotation speed is successively added with a first variable rotation speed to define a plurality of different first experimental rotation speeds, and the air-cooled heat dissipation module dissipates heat in the enclosed space at the gradually varying first experimental rotation speed, so as to correspondingly perform a plurality of detections and records of a plurality of second experimental steady-state equilibrium temperatures of the heating module 2.

[0074] Step S109 selects a second lowest steady-state equilibrium temperature from the second initial steady-state equilibrium temperature and the second experimental steady-state equilibrium temperature, and defines one of the first initial rotational speed and the first experimental rotational speed corresponding to the second lowest steady-state equilibrium temperature as a first optimal rotational speed.

[0075] In step S110 , the enclosed space is evacuated to a preset pressure.

[0076] Step S111 starts the air-cooling heat dissipation module at a second initial rotation speed, and detects and records a third initial steady-state equilibrium temperature of the heating module 2 .

[0077] In step S112, the second initial rotation speed is successively added with a second variable rotation speed to define a plurality of different second experimental rotation speeds, and the air-cooled heat dissipation module dissipates heat in the enclosed space at the gradually changing second experimental rotation speed, so as to correspondingly perform a plurality of detections and records of a plurality of third experimental steady-state equilibrium temperatures of the heating module 2.

[0078] Step S113 selects a third lowest steady-state equilibrium temperature from the third initial steady-state equilibrium temperature and the third experimental steady-state equilibrium temperature, and defines one of the second initial rotational speed and the second experimental rotational speed corresponding to the third lowest steady-state equilibrium temperature as a second optimal rotational speed.

[0079] Please continue reading Figure 8 , Figure 8 It is a curve diagram showing the change of temperature and air pressure at different fan speeds. As shown in the first to eighth figures, curve T1 shows the temperature change of the air-cooling heat dissipation module 5 from 0rpm to 6000rpm, and the average temperature measured by the multiple heating plates 21 of the heating module 2; curve T2 shows the temperature change of the air-cooling heat dissipation module 5 from 0rpm to 6000rpm after the closed space CS is evacuated; curve T3 shows the pressure change of the air-cooling heat dissipation module 5 from 0rpm to 6000rpm; curve T4 shows the pressure change of the air-cooling heat dissipation module 5 from 0rpm to 6000rpm after the closed space CS is evacuated.

[0080] It can be seen from the above curves T1 and T3 that when the air-cooling heat dissipation module 5 is not running, the temperature measured in the heating module 2 is about 66°C, and the pressure in the closed space CS is about 0.135MPa (compared to 0.055MPa in the initial vacuum environment, it means that the heating module 2 will provide a vapor pressure of about 0.08MPa after the working fluid WF is heated and boiled). When the speed of the air-cooling heat dissipation module 5 reaches 1000rpm, it will drop by about 2°C, and the pressure in the closed space CS will also drop to about 0.114MPa. On the right, the temperature drops to about 58°C after the speed reaches 4000rpm, and finally drops to about 56°C after the speed reaches 6000rpm; in comparison, it can be seen from the above curves T2 and T4 that when the closed space CS is in a vacuum state, the air-cooled heat dissipation module 5 can run at 1000rpm to significantly reduce the temperature of the heating module 2 to about 60°C, and the pressure in the closed space CS also drops to about 0.110MPa, indicating that the initial vacuum environment (0.055MPa) can accelerate the boiling of the working fluid WF.

[0081] As described above, in this embodiment, the optimal filling rate of the working fluid WF obtained by the operating parameter setting method of the immersion phase change machine of the present invention is 20%, the first optimal rotational speed when not vacuumed is 4000 rpm (the cooling effect slows down after exceeding 4000 rpm), and the second optimal rotational speed when vacuumed is 3000 rpm (the cooling effect slows down after exceeding 3000 rpm).

[0082] It should be particularly noted that, when the air-cooled heat dissipation module 5 rotates at a speed of more than 5000 rpm, regardless of whether the enclosed space CS is evacuated first, the temperature of the heating module 2 can generally be cooled to about 57°C, mainly because the boiling point of the working fluid WF is 56°C. Therefore, in other embodiments, the user can select the working fluid WF with the required boiling point according to the needs, and then obtain the optimal filling rate of the working fluid WF, the first optimal rotation speed when not evacuated, and the second optimal rotation speed when evacuated through the operating parameter setting method of the immersion phase change machine of the present invention. In summary, the operating parameter setting method of the immersion phase change machine of the present invention mainly utilizes the heat module to simulate the heat energy generated when the working element is in operation, and then injects the working fluid into the enclosed space at the initial filling rate, and injects the working fluid into the enclosed space at an increasing experimental filling rate, and then obtains the best filling rate from the detected lowest temperature, so as to effectively allow the user to obtain the filling rate that is most suitable for the working fluid; in addition, the present invention also gradually increases the speed of the air-cooled heat dissipation module, and obtains the best speed by detecting the temperature, and even obtains the best speed of the air-cooled heat dissipation module in a vacuum state. Compared with the previous technology of only immersing the working element in the working fluid, the present invention can indeed more effectively exert the cooling effect of the immersion cooling technology.

[0083] The above detailed description of the preferred embodiments is intended to more clearly describe the features and spirit of the present invention, rather than to limit the scope of the present invention by the preferred embodiments disclosed above. On the contrary, the purpose is to cover various changes and arrangements with equivalents within the scope of the patent scope to be applied for by the present invention.

Claims

1. A method for setting operating parameters of an immersion phase change machine, characterized in that: The following steps are involved: (A) a heating module for simulating the heating of a working element is arranged in a closed space of an immersion phase change machine, and the working element generates operating heat energy when operating; (B) controlling the heating module to operate at a preset power so that the heating module emits simulated heat energy that simulates the operating heat energy; (C) injecting a working fluid into the enclosed space at an initial filling rate, and detecting and recording a first initial steady-state equilibrium temperature of the heating module; (D) adding a variable filling rate to the initial filling rate to define a plurality of different experimental filling rates, injecting the working fluid into the enclosed space at the increasing plurality of experimental filling rates, and correspondingly performing a plurality of detections and recording a plurality of first experimental steady-state equilibrium temperatures of the heating module; as well as (E) selecting a first lowest steady-state equilibrium temperature from among the first initial steady-state equilibrium temperature and the plurality of first experimental steady-state equilibrium temperatures, and defining the initial filling rate and one of the plurality of experimental filling rates corresponding to the first lowest steady-state equilibrium temperature as an optimal filling rate.

2. The method for setting operating parameters of an immersion phase change machine according to claim 1, wherein: in, When the working fluid is injected into the enclosed space and reaches the initial filling rate, the heating module is immersed in the working fluid.

3. The method for setting operating parameters of an immersion phase change machine according to claim 1, wherein: After step (E), the method further comprises the following steps: (F) injecting the working fluid into the confined space at the optimal filling rate; (G) starting an air-cooling heat dissipation module thermally connected to the enclosed space at a first initial rotation speed to detect and record a second initial steady-state equilibrium temperature of the working element; (H) successively adding a first variable speed to the first initial speed to define a plurality of different first experimental speeds, and causing the air-cooling heat dissipation module to dissipate heat from the enclosed space at the plurality of gradually varying first experimental speeds, so as to correspondingly perform a plurality of detections and records of a plurality of second experimental steady-state equilibrium temperatures of the working element; as well as (I) selecting a second lowest steady-state equilibrium temperature from the second initial steady-state equilibrium temperature and the plurality of second experimental steady-state equilibrium temperatures, and defining the first initial rotational speed and one of the plurality of first experimental rotational speeds corresponding to the second lowest steady-state equilibrium temperature as a first optimal rotational speed.

4. The method for setting operating parameters of an immersion phase change machine as claimed in claim 3, wherein: in, The first initial rotation speed is 0 rpm.

5. The method for setting operating parameters of an immersion phase change machine as claimed in claim 3, wherein: After step (I), the method further comprises the following steps: (J) evacuating the enclosed space to a preset pressure; (K) starting the air-cooling heat dissipation module at a second initial rotation speed, detecting and recording a third initial steady-state equilibrium temperature of the working element; (L) adding a second variable speed to the second initial speed in sequence to define a plurality of different second experimental speeds, and causing the air-cooling heat dissipation module to dissipate heat from the enclosed space at the plurality of gradually varying second experimental speeds, so as to correspondingly perform a plurality of detections and records of a plurality of third experimental steady-state equilibrium temperatures of the working element; as well as (M) selecting a third lowest steady-state equilibrium temperature from the third initial steady-state equilibrium temperature and the plurality of third experimental steady-state equilibrium temperatures, and defining the second initial rotational speed and one of the plurality of second experimental rotational speeds corresponding to the third lowest steady-state equilibrium temperature as a second optimal rotational speed.

6. The method for setting operating parameters of an immersion phase change machine as claimed in claim 5, wherein: in, The preset pressure is 0.055 MPa.

7. The method for setting operating parameters of an immersion phase change machine as claimed in claim 5, wherein: in, The second initial rotation speed is 0 rpm.

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