Phase change material injection system into a closed cooling plate and injection method

Abstract

The present invention discloses a system for injecting a phase change material into a closed cooling plate and a method for such injection. The present invention is configured to increase the filling amount of the phase change material while continuously maintaining the phase change material in a liquid state through melting to prevent solidification after a preliminary process of removing impurities and air when injecting the phase change material into the closed cooling plate, thereby solving the problem of air capture caused by the high viscosity and surface tension of the phase change material. Accordingly, a new process for injecting the phase change material into the closed cooling plate is established to improve the efficiency of injecting the phase change material into the cooling plate.

Description

Technology Field

[0001] The present invention relates to a technology for injecting a phase change material (PCM) into a closed cooling plate for cooling and heat storage of electronic equipment, and more specifically, to a system and method for injecting a phase change material into a closed cooling plate that can improve the efficiency of the injection process by continuously maintaining the phase change material injected into the closed cooling plate in a liquid state through temperature and pressure control. Background Technology

[0003] Generally, a cooling plate injected with a phase change material (PCM) that changes from a liquid to a solid state and stores cold energy is used in a manner that stores cold energy and releases it when needed, and the thermal performance of the cooling plate injected with the phase change material is significantly affected by the amount of the phase change material filled.

[0004] At this time, when injecting the phase change material into the cooling plate, it is common practice to melt the solid phase change material using separate equipment and then inject it using a hose and syringe.

[0005] However, since the injection method described above involves melting the phase change material and injecting it into the cooling plate, if the heating control of the phase change material is insufficient during the injection process, the melted phase change material inside the hose and syringe solidifies again through heat exchange with the surroundings. At this time, the solidified phase change material blocks the interior, causing a problem in that the injection process cannot be performed smoothly.

[0006] In addition, conventionally, even if the molten phase change material is smoothly injected into the cooling plate inlet through a hose and syringe, it solidifies through heat exchange with the cooling plate, causing significant difficulty in achieving the intended position and volume.

[0007] In addition, conventionally, during the phase change material injection process, internal air must move over the cooling plate due to buoyancy; however, there was a problem in that the air could not easily escape and remained inside due to the high viscosity and surface tension of the liquid phase change material.

[0008] Furthermore, although the required temperature ranges of various electronic equipment and the phase change temperature ranges of phase change materials vary, phase change materials have not conventionally been systematically injected to ensure the thermal performance of cooling plates. Prior art literature

[0010] Registered Patent Publication No. 10-1586794 (Published Jan. 19, 2016) Registered Patent Publication No. 10-2069881 (Published Jan. 23, 2020) Registered Patent Publication No. 10-2089546 (Published Mar. 16, 2020) Published Patent Publication No. 10-2022-0033440 (Published Mar. 16, 2022) Registered Patent Publication No. 10-2598889 (Published Nov. 06, 2023) Registered Patent Publication No. 10-2610064 (Published Dec. 05, 2023) The problem to be solved

[0011] Accordingly, the present invention aims to solve the aforementioned problems. The objective of the present invention is to provide a system and method for injecting a phase change material into a closed cooling plate, which can improve the efficiency of injecting the phase change material into the cooling plate by establishing a new process for injecting the phase change material into the closed cooling plate. This is achieved by maintaining the phase change material in a liquid state through melting to prevent solidification after a preliminary process of removing impurities and air when injecting the phase change material into the closed cooling plate, while maintaining the temperature and pressure at a constant level, and by solving the problem of air capture caused by the high viscosity and surface tension of the phase change material and increasing the filling amount of the phase change material. means of solving the problem

[0013] A phase change material injection system into a sealed cooling plate according to the first aspect of the present invention for achieving the above-mentioned purpose is an injection system that injects a phase change material stored in a PCM tank, controlled by a PID controller, into a cooling plate having a sealed structure through an injection line opened and closed by a first valve, wherein first and second control lines, opened and closed by second to fourth valves, are connected to the injection line and the cooling plate, respectively, and a pressure regulating unit is formed in the first and second control lines to regulate the internal pressure to below a preset atmospheric pressure while draining the fluid inside the cooling plate to the outside, and a heating unit is formed in the PCM tank, the injection line, and the cooling plate, respectively, to melt the phase change material so as to inject it in a liquid state and maintain it continuously, and a vibrator is formed in the cooling plate to vibrate the cooling plate to separate the fluid contained in the phase change material melted in a liquid state, and a cooler is formed to solidify the phase change material in a liquid state from which the fluid has been separated by the vibrator, and the PCM tank and the cooling plate Each temperature sensor is formed, and the PID controller is configured to selectively control the opening and closing of the pressure regulating unit, the heating unit, the vibrator, the cooler, and the first to fourth valves according to a set control schedule so that the phase change material in a liquid state injected into the cooling plate solidifies based on the detected temperature of the temperature sensor.

[0014] In addition, a drain line that is opened and closed by a fifth valve is branched from the second control line, and a drain tank that stores fluid drained from the cooling plate is connected to the drain line.

[0015] In addition, the water level change in the PCM tank and the mass of the phase change material solidifying in the cooling plate are monitored using a scale, and the monitoring information is configured to be provided to the PID controller.

[0016] In addition, the above PCM tank is formed of a transparent material to monitor water level measurement.

[0017] In addition, the above scale is mounted on the PCM tank and the cooling plate, respectively.

[0018] In addition, the pressure regulating unit includes an air compressor connected to the first control line branched from the injection line; and a vacuum pump connected to the second control line; and a pressure gauge is formed in the second control line.

[0019] In addition, when the air compressor is operated according to the control schedule of the PID controller to drain the fluid in the cooling plate into the drain tank, the second valve and the fifth valve are controlled to be open, and the first valve and the third and fourth valves are controlled to be closed.

[0020] In addition, when the vacuum pump is operated according to the control schedule of the PID controller to drain the fluid in the cooling plate into the drain tank, the third and fourth valves are controlled to be open and the first and second valves are controlled to be closed, and the fifth valve is configured to be controlled to be open with a time delay when the internal pressure of the cooling plate drops below a preset atmospheric pressure after the third and fourth valves are controlled to be open.

[0021] In addition, the heating unit includes a first heater attached to the PCM tank, a second heater attached to the injection line, and a third heater attached to the cooling plate.

[0022] In addition, the first to third heaters are one of a cartridge heater, a film heater, a line heater, a plate heater, and a hot plate.

[0023] In addition, the third heater and the cooler are formed in a structure that is attached to or detached from the cooling plate.

[0024] In addition, the third heater and the cooler are configured to form a single plate heat exchanger and to exchange heat with the chiller.

[0025] In addition, according to the control schedule of the PID controller, the first heater and the second heater are operated to melt the phase change material in the PCM tank and inject it into the cooling plate in a liquid state using the internal pressure difference, and the first valve is controlled to be open, and the second to fifth valves are controlled to be closed.

[0026] In addition, the above vibrator is configured to be stacked together with the third heater on the bottom surface of the cooling plate.

[0027] In addition, when the vibrator is operated according to the control schedule of the PID controller to separate fluid from the phase change material injected into the cooling plate in a liquid state, the first to fourth valves are controlled to be closed, and the fifth valve is controlled to be open so that the internal pressure of the cooling plate is reduced and the phase change material is continuously injected into the cooling plate in a liquid state.

[0028] In addition, the cooler is formed on the upper surface of the cooling plate.

[0029] In addition, the cooler is operated according to the control schedule of the PID controller, and when the phase change material in a liquid state solidifies, the first to fifth valves are configured to be closed, and the fifth valve is configured to be opened with a time delay after the phase change material has solidified so that the fluid that rises due to buoyancy during the solidification process is drained into the drain tank.

[0030] In addition, the first to fifth valves are electronic valves that are opened and closed by the PID controller.

[0031] In addition, the first to fifth valves mentioned above are manual valves that are opened and closed according to the operation of a worker.

[0032] In addition, the injection line, the drain line, and the first and second control lines are piping structures made of metal or rubber depending on the usage pressure and phase change temperature of the phase change material.

[0033] In addition, the PCM tank is configured to store a refrigerant in place of the phase change material, and the cooling plate is configured to inject the refrigerant.

[0035] Meanwhile, a method for injecting a phase change material into a closed cooling plate according to another aspect of the present invention, implemented by a system for injecting a phase change material into a closed cooling plate, is controlled by a PID controller and comprises: a first process of first draining moisture and impurities, which are fluids remaining inside a cooling plate forming a closed structure, into a drain tank through an air compressor while controlling the first valve and the third and fourth valves to be closed and controlling the second valve and the fifth valve to be open; and a second process of lowering the internal pressure of the cooling plate to below a preset atmospheric pressure through a vacuum pump while secondarily draining moisture and impurities, which are fluids remaining inside the cooling plate, into the drain tank after the first process while controlling the first and second valves to be closed and controlling the third to fifth valves to be open. A third process in which, when the internal pressure of the cooling plate is lowered below a preset atmospheric pressure from the second process, the first to fifth valves are closed and the phase change material stored in the PCM tank is melted into a liquid state through the first heater based on the temperature detected by the temperature sensor; a fourth process in which, when the phase change material is melted into a liquid state from the third process, the cooling plate is heated to a predetermined temperature through the third heater based on the temperature detected by the temperature sensor; a fifth process in which, when the cooling plate is heated from the fourth process, the second to fifth valves are closed and the first valve is opened and the phase change material is injected into the cooling plate in a liquid state using the internal pressure difference between the PCM tank and the cooling plate, while heating through the second heater to maintain the phase change material in a liquid state; and a sixth process in which, when the phase change material is injected into the cooling plate in a liquid state from the fifth process, the cooling plate is vibrated through a vibrator and air is separated as a fluid from the phase change material in a liquid state.A seventh process of draining air separated from the phase change material into the drain tank by controlling the fifth valve to open so that the liquid injection of the phase change material continues while reducing the internal pressure rising as the phase change material is injected into the cooling plate in a liquid state from the sixth process; an eighth process of solidifying the phase change material injected into the interior of the cooling plate in a liquid state through a cooler as the internal pressure decreases from the seventh process, and draining air into the drain tank as a fluid rising due to buoyancy during the solidification process; and a ninth process of determining whether to continue or stop the liquid injection of the phase change material into the cooling plate while monitoring the internal water level of the PCM tank and the mass of the phase change material injected into the cooling plate in a liquid state through a scale. Effects of the invention

[0037] According to the present invention, when injecting a phase change material into a closed cooling plate, the phase change material is continuously maintained in a liquid state through melting to prevent solidification after a preliminary process of removing impurities and air, while maintaining constant temperature and pressure, and is configured to increase the filling amount of the phase change material while solving the problem of air capture caused by the high viscosity and surface tension of the phase change material. Through this, a new process for injecting a phase change material into a closed cooling plate is established, thereby expecting the effect of improving the efficiency of injecting the phase change material into the cooling plate.

[0038] The effects of the present invention are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art from the description in the claims. Brief explanation of the drawing

[0040] The drawings attached below are intended to aid in understanding the embodiments thereof and provide embodiments together with a detailed description. However, the technical features of the embodiments thereof are not limited to specific drawings, and the features disclosed in each drawing may be combined with one another to form new embodiments. FIG. 1 is a schematic block diagram of a phase change material injection system into a closed cooling plate as an embodiment of the present invention. Specific details for implementing the invention

[0041] The detailed description of the invention refers to the accompanying drawings, which illustrate specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that various embodiments of the invention are different but need not be mutually exclusive. For example, specific shapes, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in relation to one embodiment. It should also be understood that the location or arrangement of individual components within each disclosed embodiment may be changed without departing from the spirit and scope of the invention. Accordingly, the following detailed description is not intended to be limiting, and the scope of the invention is limited only by the appended claims, including all equivalents to those claimed therein, provided appropriately described. Similar reference numerals in the drawings refer to the same or similar functions across various aspects.

[0042] Hereinafter, embodiments of the present invention will be described with reference to the attached drawings.

[0043] Figure 1 shows a schematic block diagram of a phase change material injection system into a closed cooling plate as an embodiment of the present invention.

[0044] Referring to the attached FIG. 1, a phase change material injection system into a sealed cooling plate according to an embodiment of the present invention is controlled by a PID controller (Proportional Integral Derivative controller) (10) to melt a phase change material stored in a PCM tank (1) into a liquid state and then inject it into a cooling plate (2) having a sealed structure through an injection line (L1), which is a pipe structure made of metal or rubber and opened and closed by a first valve (V1) made of a manual valve or an electronic valve. This is configured by connecting first and second control lines (L11, L12), which are pipe structures made of metal or rubber and opened and closed by second to fourth valves (V2, V3, V4) made of a manual valve or an electronic valve, respectively, to the injection line (L1) and the cooling plate (2), and thereby including a pressure regulating unit (20), a heating unit (30), a vibrator (40), A cooler (50) and a drain tank (60) are connected to the cooling plate (2) through a drain line (L2), which is a pipe structure made of metal or rubber that is opened and closed by a fifth valve (V5) consisting of a manual valve or an electronic valve.

[0045] The pressure control unit (20) is formed in the first and second control lines (L11, L12), respectively, and controls the internal pressure of the cooling plate (2) to below a preset atmospheric pressure while draining the fluid (e.g., moisture, impurities, air) inside the cooling plate (2) into the drain tank (60), and includes an air compressor (21), a vacuum pump (22), and a pressure gauge (23).

[0046] The air compressor (21) is connected to the first control line (L11) branched from the injection line (L1) and is operated under the control of the PID controller (10) to drain fluid (e.g., moisture, impurities) in the cooling plate (2) into the drain tank (60). This is operated when the second valve (V2) and the fifth valve (V5) are controlled to be open and the first valve (V1) and the third and fourth valves (V3, V4) are controlled to be closed according to the control schedule of the PID controller (10).

[0047] The vacuum pump (22) is connected to the second control line (L12) and is operated under the control of the PID controller (10) to drain fluid (e.g., moisture, air) inside the cooling plate (2) into the drain tank (60). This is configured such that the third and fourth valves (V3, V4) are controlled to be open and the first and second valves (V1, V2) are controlled to be closed according to the control schedule of the PID controller (10), and the fifth valve (V5) is operated when it is controlled to be opened after a time delay when the internal pressure of the cooling plate (2) drops below a preset atmospheric pressure after the opening control of the third and fourth valves (V3, V4).

[0048] The heating unit (30) melts the phase change material in a liquid state and continuously maintains it in the PCM tank (1), the injection line (L1), and the cooling plate (2), respectively, and includes a first heater (31) attached to the PCM tank (1), a second heater (32) attached to the injection line (L1), and a third heater (33) attached to the cooling plate (2).

[0049] That is, when the first valve (V1) is controlled to open and the second to fifth valves (V2, V3, V4, V5) are controlled to close according to the control schedule of the PID controller (10), the first heater (31) and / or the second heater (32) and the third heater (33) are operated to melt the phase change material in the PCM tank (1) and inject it into the cooling plate (2) in a liquid state using the internal pressure difference.

[0050] Here, the internal pressure difference is a difference between the first pressure in the injection line (L1) according to the heating temperature of the phase change material in a liquid state heated by the first and second heaters (31, 32) and the second pressure according to the temperature in the cooling plate (2) heated by the third heater (33), and when the first pressure is higher than the second pressure, the injection of the phase change material in a liquid state into the cooling plate (2) is made smooth through the pressure difference. In addition, the PCM tank (1) and the cooling plate (2) may be configured to have the same height or different heights so that the phase change material is injected through the injection line (L1) by a vacuum pump not shown, or so that the injection of the phase change material is made using a height difference.

[0051] Here, the phase change material can be injected through the injection line (L1) by an unillustrated vacuum pump at the same height or different heights of the PCM tank (1) and the cooling plate (2), or the phase change material can be injected using a height difference.

[0052] Here, the first to third heaters (31, 32, 33) may be any one of a cartridge heater, a film heater, a line heater, a plate heater, or a hot plate, and the third heater (33) and the cooler (50) may be formed in a structure that is attached to or detached from the cooling plate (2), while the third heater (33) and the cooler (50) may be configured to form a single plate-type heat exchanger and to exchange heat with a chiller (not shown).

[0053] The above vibrator (40) is configured to be stacked with the third heater (33) on the bottom surface of the cooling plate (2) and vibrates the cooling plate (2) to separate the fluid (e.g., air) from the phase change material injected into the cooling plate (2) in a liquid state.

[0054] That is, according to the control schedule of the PID controller (10), the first to fourth valves (V1, V2, V3, V4) are controlled to be closed, and the fifth valve (V5) is controlled to be open so that the internal pressure of the cooling plate (2) is reduced and the phase change material is continuously injected into the cooling plate (2) in a liquid state, and the vibrator (40) is operated to separate the fluid from the phase change material injected into the cooling plate (2) in a liquid state.

[0055] The cooler (50) is formed on the upper surface of the cooling plate (2) and is configured to solidify the phase change material in a liquid state, from which the fluid has been separated by the vibrator (40).

[0056] That is, the first to fifth valves (V1, V2, V3, V4, V5) are configured to be closed according to the control schedule of the PID controller (10), and the fifth valve (V5) is operated to solidify the phase change material in a liquid state when it is opened at a time interval to drain the fluid (e.g., air) that rises due to buoyancy during the solidification process into the drain tank (60) after the phase change material has solidified.

[0057] The above PID controller (10) is configured to selectively control the opening and closing of the pressure control unit (20), the heating unit (30), the vibrator (40), the cooler (50), and the first to fourth valves (V1, V2, V3, V4) according to the set control schedule, based on the detected temperature of the temperature sensors (TS1, TS2) formed on the PCM tank (1) and the cooling plate (2), respectively, so that the phase change material in a liquid state injected into the cooling plate (2) solidifies.

[0058] Here, the change in water level within the PCM tank (1) and the mass of the phase change material solidifying within the cooling plate (2) are monitored using a scale (not shown), and the monitoring information is provided to the PID controller (10), so that the PID controller (10) can determine whether to continue injecting the phase change material in a liquid state.

[0059] That is, the water level measurement in the PCM tank (1) is manually input into the PID controller (10) after monitoring is performed by an operator while the PCM tank (1) is formed of a transparent material, and the mass monitoring of the phase change material is input into the PID controller (10) after being performed by a scale, and the scale can be mounted on the PCM tank (1) and the cooling plate (2), respectively.

[0060] The drain tank (60) is connected to a branched drain line (L4) that is opened and closed by a fifth valve (V5) in the second control line (L12), and is configured to store fluid (e.g., moisture, impurities, air) drained from the cooling plate (2).

[0061] Meanwhile, although the embodiment of the present invention describes storing a phase change material in the PCM tank (1) and then injecting it into the cooling plate (2), a refrigerant may be stored in the PCM tank (1) instead of the phase change material and then injected into the cooling plate (2), and since the injection method is the same, the redundant description thereof will be omitted below.

[0062] That is, the method of injecting a phase change material into a cooling plate according to an embodiment of the present invention is controlled by a PID controller (10), as shown in the attached FIG. 1, first, as a first process, the first valve (V1) and the third and fourth valves (V3, V4) are controlled to be closed and the second valve (V2) and the fifth valve (V5) are controlled to be open, and the air compressor (21) is operated to first drain moisture and impurities as fluid remaining inside the cooling plate (2) which has a sealed structure into a drain tank (60).

[0063] As the next second process, the first and second valves (V1, V2) are closed and the third to fifth valves (V3, V4, V5) are opened, and the vacuum pump (22) is operated to lower the internal pressure of the cooling plate (2) to below a preset atmospheric pressure while draining the fluid remaining inside the cooling plate (2), which is moisture and impurities, into the drain tank (60).

[0064] As the third process, when the internal pressure of the cooling plate (2) is lowered to a preset atmospheric pressure or lower, the first to fifth valves (V1, V2, V3, V4, V5) are closed, and the phase change material stored in the PCM tank (1) is melted into a liquid state through the first heater (31) based on the detected temperature of the temperature sensor (TS1).

[0065] As the following fourth process, when the phase change material melts into a liquid state, the cooling plate (2) is heated to a predetermined temperature through the third heater (33) based on the detected temperature of the temperature sensor (TS2).

[0066] As the following fifth process, when the cooling plate (2) is heated, the second to fifth valves (V2, V3, V4, V5) are controlled to be closed and the first valve (V1) is controlled to be open, and a phase change material is injected in a liquid state into the cooling plate (2) through the injection line (L1) using the internal pressure difference between the PCM tank (1) and the cooling plate (2), while heating the phase change material flowing in the injection line (L1) through the second heater (32) so that the phase change material maintains a liquid state.

[0067] As the sixth step, when the phase change material is injected into the cooling plate (2) in a liquid state, the vibrator (40) is operated to vibrate the cooling plate (2) and separate air as a fluid from the phase change material in a liquid state.

[0068] As the next seventh process, the fifth valve (V5) is controlled to open so that the liquid injection of the phase change material continues while reducing the internal pressure rising as the phase change material is injected into the cooling plate (2), thereby draining the air separated from the phase change material into the drain tank (60).

[0069] As the next eighth process, the phase change material injected into the cooling plate (2) in a liquid state due to the reduction of internal pressure within the cooling plate (2) is solidified by operating the cooler (50), and air is drained into the drain tank (60) as a fluid that rises due to buoyancy during the solidification process.

[0070] As the ninth process, the internal water level of the PCM tank (1) and the mass of the phase change material injected in a liquid state into the cooling plate (2) are monitored through a scale, and a decision is made as to whether to continue or stop the injection of the phase change material in a liquid state into the cooling plate (2).

[0071] That is, if the change in the water level in the PCM tank (1) or the mass of the phase change material solidified on the cooling plate (2) through the scale does not satisfy the set standard, the first to seventh processes are repeated, and if the set standard is satisfied, the injection of the phase change material is stopped.

[0072] Thus, the embodiment of the present invention solves the problem of air capture due to high viscosity and surface tension by first removing moisture, impurities and / or air from the cooling plate (2) before injecting the phase change material, and then melting the phase change material stored in the PCM tank (1) into a liquid state and continuously injecting it into the cooling plate (2), thereby increasing the efficiency of injecting the phase change material into the cooling plate (2) and increasing the amount of filling.

[0073] Although the technical concept of the phase change material injection system and injection method into a closed cooling plate according to the present invention has been described above together with the attached drawings, this is merely an illustrative description of the best embodiment of the present invention and is not intended to limit the present invention.

[0074] Accordingly, the present invention is not limited to the specific preferred embodiments described above, and anyone with ordinary knowledge in the art to which the invention pertains can make various modifications without departing from the essence of the invention as claimed in the claims, and such modifications will be within the scope of the claims. Explanation of the symbols

[0075] 1; PCM tank 2; Cooling plate 10; PID controller 20; pressure regulating unit 21; Air compressor 22; vacuum pump 23; pressure gauge 30; heating part 31; 1st heater 32; 2nd heater 33; 3rd heater 40; vibrator 50; Cooler 60; Drain tank L1; Injection line L2; Drainline L11; 1st control line L12; 2nd control line V1, V2, V3, V4, V5; valve TS1, TS2; Temperature sensor

Claims

Claim 1 In an injection system controlled by a PID controller for injecting a phase change material stored in a PCM tank into a cooling plate having a sealed structure through an injection line opened and closed by a first valve, the injection line and the cooling plate are each connected to first and second control lines opened and closed by second to fourth valves, wherein the first and second control lines are formed with a pressure regulating unit that regulates the internal pressure to below a preset atmospheric pressure while draining the fluid inside the cooling plate to the outside, wherein the PCM tank, the injection line, and the cooling plate are each formed with a heating unit that melts the phase change material to inject it in a liquid state and maintain it continuously, wherein the cooling plate is formed with a vibrator that vibrates the cooling plate to separate the fluid contained in the phase change material melted in a liquid state, and a cooler that solidifies the phase change material in a liquid state from which the fluid has been separated by the vibrator, wherein a temperature sensor is formed in the PCM tank and the cooling plate, respectively, and the PID controller [injects] the cooling plate based on the detected temperature of the temperature sensor A phase change material injection system into a sealed cooling plate, characterized by being configured to selectively control the opening and closing of the pressure regulating unit, the heating unit, the vibrator, the cooler, and the first to fourth valves according to a set control schedule so that the phase change material in a liquid state injected solidifies. Claim 2 A phase change material injection system into a closed cooling plate according to claim 1, characterized in that a drain line, which is opened and closed by a fifth valve, is branched from the second control line, and a drain tank for storing fluid drained from the cooling plate is connected to the drain line. Claim 3 A phase change material injection system into a closed cooling plate according to claim 1, characterized in that the water level change in the PCM tank and the mass of the phase change material solidifying in the cooling plate are monitored through a scale, and the monitoring information is provided to the PID controller. Claim 4 A phase change material injection system into a closed cooling plate, characterized in that, in claim 3, the PCM tank is formed of a transparent material to monitor water level measurement. Claim 5 A phase change material injection system into a closed cooling plate according to claim 3, characterized in that the scale is mounted on the PCM tank and the cooling plate, respectively. Claim 6 A system for injecting a phase change material into a sealed cooling plate according to claim 2, wherein the pressure regulating unit comprises: an air compressor connected to the first control line branched from the injection line; and a vacuum pump connected to the second control line; and wherein a pressure gauge is formed in the second control line. Claim 7 A phase change material injection system into a closed cooling plate according to claim 6, characterized in that when the air compressor is operated according to the control schedule of the PID controller to drain the fluid in the cooling plate into the drain tank, the second valve and the fifth valve are controlled to be open, and the first valve and the third and fourth valves are controlled to be closed. Claim 8 A phase change material injection system into a closed cooling plate according to claim 6, wherein when the vacuum pump is operated according to the control schedule of the PID controller to drain the fluid in the cooling plate into the drain tank, the third and fourth valves are controlled to be open and the first and second valves are controlled to be closed, and the fifth valve is configured to be controlled to be open with a time delay after the third and fourth valves are controlled to be open and when the internal pressure of the cooling plate drops to below a preset atmospheric pressure. Claim 9 A phase change material injection system into a closed cooling plate according to claim 2, wherein the heating unit comprises a first heater attached to the PCM tank, a second heater attached to the injection line, and a third heater attached to the cooling plate. Claim 10 A phase change material injection system into a sealed cooling plate according to claim 9, characterized in that the first to third heaters are one of a cartridge heater, a film heater, a line heater, a plate heater, and a hot plate. Claim 11 A phase change material injection system into a sealed cooling plate according to claim 9, characterized in that the third heater and the cooler are formed in a structure attached to or detached from the cooling plate. Claim 12 A phase change material injection system into a closed cooling plate according to claim 9, characterized in that the third heater and the cooler are configured to form a single plate heat exchanger and perform heat exchange with the chiller. Claim 13 A system for injecting a phase change material into a closed cooling plate according to claim 9, wherein, when the first heater and the second heater are operated according to the control schedule of the PID controller to melt the phase change material in the PCM tank and inject it into the cooling plate in a liquid state using an internal pressure difference, the first valve is controlled to be open and the second to fifth valves are controlled to be closed. Claim 14 A phase change material injection system into a sealed cooling plate according to claim 9, characterized in that the vibrator is laminated together with the third heater on the bottom surface of the cooling plate. Claim 15 A system for injecting a phase change material into a closed cooling plate according to claim 2, characterized in that when the vibrator is operated according to the control schedule of the PID controller to separate fluid from the phase change material injected into the cooling plate in a liquid state, the first to fourth valves are controlled to be closed, and the fifth valve is controlled to be open so that the internal pressure of the cooling plate is reduced and the phase change material is continuously injected into the cooling plate in a liquid state. Claim 16 A phase change material injection system into a sealed cooling plate according to claim 2, characterized in that the cooler is formed on the upper surface of the cooling plate. Claim 17 A system for injecting a phase change material into a closed cooling plate according to claim 2, wherein, when the phase change material in a liquid state is solidified by operating the cooler according to the control schedule of the PID controller, the first to fifth valves are configured to be controlled to be closed, and the fifth valve is configured to be controlled to be opened with a time delay after the phase change material has solidified so as to drain the fluid that rises due to buoyancy during the solidification process into the drain tank. Claim 18 A phase change material injection system into a closed cooling plate according to claim 2, characterized in that the first to fifth valves are electronic valves that are opened and closed by the PID controller. Claim 19 A system for injecting a phase change material into a closed cooling plate, characterized in that, in claim 2, the first to fifth valves are manual valves that are not controlled by the PID controller and are opened or closed according to the operation of an operator. Claim 20 A phase change material injection system into a closed cooling plate according to claim 2, wherein the injection line, the drain line, and the first and second control lines are piping structures made of metal or rubber depending on the usage pressure and phase change temperature of the phase change material. Claim 21 A system for injecting a phase change material into a closed cooling plate, characterized in that, in claim 1, a refrigerant is stored in the PCM tank in place of the phase change material, and the refrigerant is injected into the cooling plate. Claim 22 A method for injecting a phase change material into a closed cooling plate, comprising: a first process of first draining moisture and impurities, which are fluids remaining inside a cooling plate forming a closed structure, into a drain tank through an air compressor while controlling the first valve and the third and fourth valves to be closed and controlling the second valve and the fifth valve to be open; a second process of lowering the internal pressure of the cooling plate to below a preset atmospheric pressure through a vacuum pump while secondarily draining moisture and impurities, which are fluids remaining inside the cooling plate, into the drain tank after the first process by controlling the first and second valves to be closed and controlling the third to fifth valves to be open; and a third process of melting the phase change material stored in a PCM tank into a liquid state through a first heater based on the temperature detected by a temperature sensor when the internal pressure of the cooling plate is lowered below the preset atmospheric pressure from the second process. A fourth process of heating a cooling plate to a predetermined temperature through a third heater based on the temperature detected by a temperature sensor when the phase change material melts into a liquid state from the process; a fifth process of heating the cooling plate through a second heater while controlling the second to fifth valves to close and the first valve to open when the cooling plate is heated from the fourth process, using the internal pressure difference between the PCM tank and the cooling plate to inject the phase change material in a liquid state into the cooling plate, while maintaining the phase change material in a liquid state; a sixth process of separating air as a fluid from the phase change material in a liquid state by vibrating the cooling plate through a vibrator when the phase change material is injected into the cooling plate from the fifth process; and a seventh process of draining the air separated from the phase change material into the drain tank by controlling the fifth valve to open so that the injection of the phase change material in a liquid state continues while reducing the internal pressure rising as the phase change material is injected into the cooling plate from the sixth process.A method for injecting a phase change material into a closed cooling plate, characterized by comprising: an 8th process of solidifying the phase change material injected into the interior of the cooling plate in a liquid state through a cooler as the internal pressure decreases from the 7th process, and draining air into the drain tank as a fluid that rises due to buoyancy during the solidification process; and a 9th process of determining whether to continue or stop the injection of the phase change material in a liquid state into the cooling plate while monitoring the internal water level of the PCM tank and the mass of the phase change material injected into the cooling plate in a liquid state through a scale.

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