Marine Stirling ultralow-temperature primary energy-saving refrigerating system

Abstract

The invention discloses a marine Stirling ultralow-temperature first-stage energy-saving refrigerating system, and relates to the technical field of energy-saving heat exchange equipment.The upper portion of a base is provided with a refrigerating machine body, a heat dissipation device, a control system cabinet, a plate heat exchanger and a gas-liquid separator, and ship waste heat serves as a heat driving source; a crankshaft rotates, rotation motion is converted into reciprocating linear motion of a piston assembly, a gear and the crankshaft are in linkage to coordinate multi-piston motion, a compression cavity and an expansion cavity are separated through a supporting partition plate, and heat regeneration circulation is completed with helium and the like as working media, and the piston assembly reciprocates in a piston motion cavity. A working medium in the compression cavity is compressed, enters the regenerator installation cavity through the working medium pipeline and the heat exchange cavity, exchanges heat with the regenerator core body for cooling, then enters the expansion cavity to expand to do work for refrigeration (absorb heat of a low-temperature cabin of the ship), and the working medium after expansion flows through the regenerator to absorb heat for heating and returns to the compression cavity to complete circulation.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of energy-saving heat exchange equipment, in particular to a marine Stirling ultra-low-temperature primary energy-saving refrigeration system. BACKGROUND

[0002] The Stirling refrigeration system is a mechanical refrigeration device based on the Stirling cycle principle, which realizes refrigeration effect by periodically compressing and expanding working medium (usually inert gases such as helium and hydrogen) and exchanging heat with the outside, and has the characteristics of compact structure, high refrigeration efficiency, wide working temperature range (up to ultra-low temperature), and important applications in the fields of aerospace, low-temperature physics, medical treatment, ships and the like.

[0003] Although the existing technology can utilize various waste heat sources for energy recovery, some refrigerators cannot make full use of the waste heat at the hot end, energy cascade utilization is not realized, refrigeration comprehensive energy efficiency needs to be improved, the mechanical energy-electric energy-mechanical energy conversion process exists in the motor-driven Stirling refrigerator, and energy dissipation loss exists in the electric energy transmission process, which reduces the energy utilization efficiency, in the heat-driven Stirling refrigerator, the resonator displacement is sensitive to the heating temperature, the refrigeration temperature and the pressure, and a slight change in the parameters will cause a large change in the resonator displacement, resulting in unstable operation of the refrigerator, and the refrigerator may not work or the amplitude may be far beyond the design value, although the Stirling refrigerator has improved efficiency compared with the cascade refrigeration, the overall efficiency is still low, and as the temperature decreases, the refrigeration efficiency will decrease sharply. At the same time, the starting time from the normal temperature state to the low temperature state is long, and the temperature recovery time after opening the door is also long, so it is difficult to quickly meet the refrigeration demand.

[0004] Therefore, the marine Stirling ultra-low-temperature primary energy-saving refrigeration system is proposed to solve the problems in the above. SUMMARY

[0005] The application aims to provide a marine Stirling ultra-low-temperature primary energy-saving refrigeration system, which uses ship waste heat as a heat driving source, enters the inside of a first shell through a second cooler and a second heat exchange cavity, rotates a crankshaft to convert rotary motion into reciprocating linear motion of a piston assembly, coordinates the motion of multiple pistons through gear linkage with the crankshaft, stably fixes a refrigerator main body on a base through a base support, wraps internal components with a second shell, separates a compression cavity and an expansion cavity through a support partition, completes a regenerative cycle with helium as working medium, reciprocally moves the piston assembly in a piston motion cavity, compresses working medium in the compression cavity, enters a regenerator installation cavity through a working medium pipeline and a heat exchange cavity, exchanges heat with a regenerator core to reduce temperature, then enters the expansion cavity to expand and work to refrigerate (absorb heat of a ship low-temperature cabin), and after expansion, the working medium flows through the regenerator to absorb heat and increase temperature, returns to the compression cavity to complete the cycle, thereby solving the problems of insufficient waste heat utilization of the Stirling refrigerator and energy efficiency improvement.

[0006] To achieve the above object, the present application provides the following technical solutions: a marine Stirling ultra-low temperature primary energy-saving refrigeration system, comprising a base, wherein an upper portion of the base is respectively provided with a refrigeration machine main body, a heat dissipation device, a control system cabinet, a plate heat exchanger and a gas-liquid separator; The refrigeration machine main body comprises a first cooler and a second cooler, outer walls of the first cooler and the second cooler are respectively communicated with a group of first heat exchange cavities and second heat exchange cavities, one side of an outer wall of the group of first heat exchange cavities and second heat exchange cavities is communicated with a first shell, and internal components of the first shell are acted on.

[0007] Preferably, the outer wall of the first shell is connected with an end cap on both sides, the outer wall of the end cap is installed with a piston assembly on one side, the outer wall of the first shell is connected with a working medium pipeline, and the working medium pipeline acts on the internal components of the first shell.

[0008] Preferably, the first shell is internally provided with a regenerator mounting cavity, the regenerator mounting cavity is internally provided with a piston movement cavity, sleeve sleeves are mounted on both sides of the inner wall of the regenerator mounting cavity, and a regenerator core body is mounted on one side of the outer wall of the group of sleeve sleeves.

[0009] Preferably, the inner wall of the piston movement cavity is separated by a support partition plate, a sealing assembly is mounted on both sides of the inner wall of the first shell, and a group of guide blocks are mounted on both sides of the outer wall of the first shell.

[0010] Preferably, a group of the guide blocks are rotationally connected with a group of crankshafts, a group of the crankshafts are rotationally connected with bearings, and the inner wall of a group of the bearings is rotationally connected with a gear wheel, so as to realize circulation and energy conversion of refrigeration working medium.

[0011] Preferably, the heat dissipation device comprises a pipeline connecting part and a refrigeration machine connecting part, and the heat dissipation device is connected with the refrigeration machine main body through the pipeline connecting part and the refrigeration machine connecting part.

[0012] Preferably, the outer wall of the pipeline connecting part and the refrigeration machine connecting part is communicated with a first support structure on one side, a group of fins are mounted on the inner wall of a group of the first support structures, a mounting seat is connected with the outer wall of the first support structure on one side, a motor is mounted on the outer wall of the mounting seat on one side, and a base support is mounted at the bottom of the first support structure. The heat dissipation device is used for dissipating heat generated during equipment operation, so as to ensure normal working temperature of the equipment.

[0013] Preferably, the control system cabinet is mounted on the base, and the control system cabinet is used for mounting various electrical elements and control systems for controlling equipment operation, so as to realize operation parameter control and state monitoring of the refrigeration machine main body, the heat dissipation device and other components.

[0014] Preferably, the plate heat exchanger comprises fixed plates, a set of connecting rods are connected between the fixed plates, a set of working medium passage interfaces are arranged on the outer walls of the fixed plates, and the plate heat exchanger is assembled by metal sheets through fastening components, so that heat exchange between different working media is realized.

[0015] Preferably, the gas-liquid separator comprises two working medium transmission pipelines, which are used to build a closed passage to connect the refrigerating machine body, the plate heat exchanger and the gas-liquid separator in series, an interface is communicated with one side of the outer wall of the working medium transmission pipeline, a main body tank cavity is installed on one side of the outer wall of the interface, a second supporting structure is installed outside the main body tank cavity, and the gas-liquid separator is used to separate gas and liquid in the working medium and ensure efficient refrigeration cycle.

[0016] Compared with the prior art, the plate heat exchanger has the following beneficial effects: 1、The present application realizes refrigeration through Stirling cycle, effectively solves the problems of insufficient utilization of heat waste at the hot end of the existing Stirling refrigerating machine, non-implementation of energy cascade utilization and low comprehensive energy efficiency of refrigeration, and the operation process is as follows: after the control system cabinet sends a start instruction, the ship waste heat serving as a heat driving source enters the first shell through the second cooler and the second heat exchange cavity, so as to drive the rotation of the crankshaft. The crankshaft is installed in the sleeve of the refrigerating machine body through bearings, can convert the rotary motion into reciprocating linear motion of the piston assembly, the gear is connected with the crankshaft, and the motion of the multiple pistons is coordinated to ensure the synchronization of the cycle. The refrigerating machine body is stably arranged on the base through the base support, the second shell wraps and protects the internal components, the supporting partition plate separates the compression cavity and the expansion cavity, and provides physical space for the cycle. The cycle takes helium as the working medium, and the piston assembly reciprocates in the piston motion cavity: when the piston moves to one end of the cylinder, the working medium in the compression cavity (formed by the supporting partition plate, the end cover and the piston assembly) is compressed, the sealing assembly ensures the airtightness to prevent leakage of the working medium, the high-temperature and high-pressure working medium after compression enters the first heat exchange cavity through the working medium pipeline, and then flows into the regenerator main body in the regenerator installation cavity through the working medium flow guide channel; the regenerator core is filled with high-specific-heat and high-thermal-conductivity materials such as foamed metal, stores the cold energy of the last cycle, releases heat after heat exchange with the working medium, and reduces the temperature to prepare for subsequent expansion refrigeration, and then the working medium after temperature reduction enters the expansion cavity opposite to the compression cavity, the piston moves in the opposite direction, the working medium expands in the expansion cavity, the temperature and pressure sharply decrease, and the refrigeration effect is realized, and the heat of the ship low-temperature cabin is absorbed in the process. The low-temperature working medium after expansion flows through the regenerator main body again, absorbs the stored heat, and then returns to the compression cavity through the working medium pipeline, so that one Stirling cycle is completed, and the waste heat utilization efficiency and the comprehensive energy efficiency of refrigeration are improved.

[0017] 2, The refrigeration equipment provided by the application is installed based on the base, and the super-low temperature refrigeration task is completed by cooperation of various components, which is suitable for the demand of ship environment, and effectively solves the problem of unstable work caused by the sensitivity of the displacement of the resonator in the heat-driven Stirling refrigerator to the heating temperature, the refrigeration temperature, the pressure and other parameters (for example, a small change in parameters causes a large change in displacement, which may cause the equipment to be unable to work or the amplitude to exceed the design value), when the equipment is running, the main body of the refrigerator completes the compression, heat recovery and expansion process of the working medium through the Stirling cycle, so as to realize the conversion between internal energy and mechanical energy. The heat generated in the compression process and the heat release stage of the heat exchanger is transmitted to the heat dissipation device by the working medium, the heat dissipation device is connected to the hot end of the main body of the refrigerator through the refrigerator connecting component and the pipeline connecting component, the fins increase the heat dissipation area, if it is a wind-cooled type, the motor drives the heat dissipation fan through the mounting seat to accelerate the heat dissipation to the outside, the support structure cooperates with the base to stabilize the heat dissipation device, the low-temperature working medium after expansion refrigeration enters the plate heat exchanger through the transmission pipeline, the working medium passage interface guides the working medium to flow between the metal sheets, the metal sheets as the core heat exchange components transfer the cold energy to the fluid on the load side, and the fastening component fixes the metal sheets to ensure the heat exchange efficiency and the sealing property, the gas-liquid separation device solves the problem of gas-liquid mixing that may occur in the working medium circulation: the gas-liquid separation device is connected to the main body of the refrigerator through the transmission pipeline, after the working medium enters the main body tank cavity, the gas-liquid separation is realized by using the gravity and the flow rate change, the gaseous working medium continues to circulate, and the liquid working medium is temporarily stored in the tank, so that the purity of the working medium is ensured, the control system cabinet is arranged on the base, various components are connected through pipelines and cables, integrated sensors are used to monitor the parameters such as the working medium temperature, the pressure, the flow, the motor speed and the equipment vibration in real time, intelligent control is realized, and the collaborative operation of each link is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a front view of the main structure of the Stirling super-low temperature primary energy-saving refrigeration system for ships in the application; Figure 2 It is a cross-sectional view of the main body of the refrigerator in the Stirling super-low temperature primary energy-saving refrigeration system for ships in the application; Figure 3 It is a cross-sectional view of the main body of the refrigerator in the Stirling super-low temperature primary energy-saving refrigeration system for ships in the application; Figure 4 It is a pipeline connection diagram in the Stirling super-low temperature primary energy-saving refrigeration system for ships in the application; Figure 5 It is a split stereogram of the heat dissipation device in the Stirling super-low temperature primary energy-saving refrigeration system for ships in the application; Figure 6 It is a pipeline connection diagram in the Stirling super-low temperature primary energy-saving refrigeration system for ships in the application; Figure 7 It is a split stereogram of the gas-liquid separator in the Stirling super-low temperature primary energy-saving refrigeration system for ships in the application; Figure 8It is a split perspective view of the plate heat exchanger in the marine Stirling ultra-low temperature primary energy-saving refrigeration system.

[0019] In the figure: 1, base; 200, refrigerator main body; 201, working medium pipeline; 202, first shell; 203, end cover; 204, piston assembly; 205, first heat exchange cavity; 206, first cooler; 207, regenerator main body; 208, second cooler; 209, second heat exchange cavity; 210, base support; 211, second shell; 212, regenerator installation cavity; 213, piston movement cavity; 214, sleeve; 215, regenerator core; 216, working medium flow guide channel; 217, support partition; 218, sealing assembly; 219, guide block; 220, crankshaft; 221, bearing; 222, gear; 300, heat dissipation device; 301, pipeline connecting part; 302, refrigerator connecting part; 303, first support structure; 304, fin; 305, motor; 306, mounting seat; 307, base support; 4, control system cabinet; 500, plate heat exchanger; 501, fixed plate; 502, connecting rod; 503, working medium channel interface; 504, fastening part; 505, metal sheet; 600, gas-liquid separator; 601, working medium transmission pipeline; 602, interface; 603, main body tank cavity; 604, second support structure. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0021] Embodiment 1, according to Figures 1-4 As shown in the figure, it includes a base 1, and the upper part of the base 1 is respectively provided with a refrigerator main body 200, a heat dissipation device 300, a control system cabinet 4, a plate heat exchanger 500 and a gas-liquid separator 600. The refrigerator main body 200 includes a first cooler 206 and a second cooler 208, and the outer walls of the first cooler 206 and the second cooler 208 are respectively communicated with a group of first heat exchange cavities 205 and a group of second heat exchange cavities 209, and the outer walls of the group of first heat exchange cavities 205 and the group of second heat exchange cavities 209 are respectively communicated with a first shell 202, and the first shell 202 is used for the internal components. The outer wall of the first shell 202 is connected with end covers 203, the outer wall of the end cover 203 is connected with a piston assembly 204, the outer wall of the first shell 202 is connected with a working medium pipeline 201, the working medium pipeline 201 acts on the internal components of the first shell 202, and the outer wall of the first shell 202 is connected with a regenerator main body 207; The internal wall of the first shell 202 is provided with a regenerator mounting cavity 212, the internal wall of the regenerator mounting cavity 212 is provided with a piston movement cavity 213, the internal wall of the regenerator mounting cavity 212 is connected with sleeves 214, and the outer wall of a group of sleeves 214 is connected with a regenerator core 215. The internal wall of the piston movement cavity 213 is separated by a support partition plate 217, the internal wall of the first shell 202 is connected with a sealing assembly 218, and the outer wall of the first shell 202 is connected with a group of guide blocks 219. A group of guide blocks 219 are rotatably connected with a group of crankshafts 220, a group of bearings 221 are rotatably connected between the crankshafts 220, the inner wall of a group of bearings 221 is rotatably connected with a gear 222, so as to realize the circulation and energy conversion of the refrigeration working medium.

[0022] The effect of the whole embodiment 1 is that the control system cabinet 4 sends a starting instruction, a heat driving source, i.e. ship waste heat, enters the inside of the first shell 202 through the second cooler 208 and the second heat exchange cavity 209, then the crankshafts 220 rotate, the crankshafts 220 are installed in the sleeves 214 of the refrigerator main body 200 through the bearings 221, the rotary motion is converted into reciprocating linear motion of the piston assembly 204, the gear 222 is linked with the crankshafts 220, the coordinated multi-piston motion ensures the circulation synchronization, the refrigerator main body 200 is stably installed on the base 1 through the base support 210, the second shell 211 wraps and protects the internal components, the support partition plate 217 separates the compression cavity and the expansion cavity, and provides a physical space basis for the circulation. The circulation is a regenerative cycle of compression to regeneration to expansion in the refrigerator main body 200 with helium as the working medium. Then the piston assembly 204 reciprocates in the piston movement cavity 213. When the piston moves to one end of the cylinder, the working medium in the space surrounded by the support partition plate 217, the end cover 203 and the piston assembly 204 is compressed. The sealing assembly 218 ensures the air tightness between the piston assembly 204 and the cylinder, so as to prevent the working medium from leaking. The compressed working medium with high temperature and high pressure enters the first heat exchange cavity 205 through the working medium pipeline 201, and then flows into the regenerator main body 207 in the regenerator mounting cavity 212 through the working medium flow guide channel 216. The regenerator core 215 is filled with high specific heat and high thermal conductivity materials such as foamed metal, and stores the cold energy of the previous cycle. The working medium exchanges heat with the regenerator core 215, releases heat, and reduces the temperature, so as to prepare for the subsequent expansion refrigeration. The working medium after cooling enters the expansion chamber surrounded by the support partition plate 217, the other end cover 203 and the piston assembly 204, opposite to the compression chamber, and the piston moves in the opposite direction, the working medium expands in the expansion chamber to do work, the temperature and pressure drop sharply, and the refrigeration effect is realized, and the heat absorbed in the process comes from the low-temperature cabin of the ship; The expanded low-temperature working medium flows through the regenerator main body 207 again, absorbs the heat stored in the regenerator core 215, and the temperature rises after the heat absorption, and then returns to the compression chamber through the working medium pipeline 201, completes a Stirling cycle, effectively solves the problem that the existing Stirling refrigerator can utilize a variety of waste heat sources for energy recovery, but still has a part of the refrigerator that cannot make good use of the waste heat at the hot end, and does not realize the step-by-step utilization of energy, and the comprehensive energy efficiency of refrigeration needs to be improved.

[0023] Embodiment 2, according to Figure 1 and Figures 5-8 As shown in the figure, the heat dissipation device 300 includes a pipeline connecting part 301 and a refrigerator connecting part 302, and the heat dissipation device 300 is connected with the refrigerator main body 200 through the pipeline connecting part 301 and the refrigerator connecting part 302; The outer wall of the pipeline connecting part 301 and the refrigerator connecting part 302 is communicated with a first support structure 303, the inner wall of a group of first support structures 303 is installed with a group of fins 304, the outer wall of the first support structure 303 is connected with a mounting seat 306, the outer wall of the mounting seat 306 is installed with a motor 305, and the bottom of the first support structure 303 is installed with a base support 307. The heat dissipation device 300 is used to dissipate the heat generated by the equipment operation, so as to ensure the normal working temperature of the equipment; The control system cabinet 4 is installed on the base 1, and the control system cabinet 4 is used to install various electrical elements and control systems for controlling the operation of the equipment, so as to realize the operation parameter control and state monitoring of the refrigerator main body 200, the heat dissipation device 300 and other components; The plate heat exchanger 500 includes a fixed plate 501, a group of connecting rods 502 connected between a group of fixed plates 501, and a group of working medium passage interfaces 503 opened on both sides of the outer wall of a group of fixed plates 501, which are assembled by metal sheets 505 through fastening parts 504, and are used to realize the heat exchange between different working media; The gas-liquid separator 600 includes two working medium transmission pipelines 601 for building a closed passage to connect the refrigerator main body 200, the plate heat exchanger 500 and the gas-liquid separator 600 in series, and the outer wall of the working medium transmission pipeline 601 is connected with an interface 602, the outer wall of the interface 602 is installed with a main body tank cavity 603, and the outside of the main body tank cavity 603 is installed with a second support structure 604. The gas-liquid separator 600 is used for separating gas and liquid in the working medium, and ensuring efficient refrigeration cycle.

[0024] The effect of the whole embodiment 2 is that: in the refrigeration cycle, the heat generated by the compression process and the regenerator heat release stage is transmitted to the heat dissipation device 300 through the working medium, and the heat dissipation device 300 is in communication with the hot end of the refrigerator main body 200 through the refrigerator connecting part 302 and the pipeline connecting part 301; the fins 304 increase the heat dissipation area, the motor 305 drives the heat dissipation fan through the mounting seat 306 to accelerate the heat dissipation to the outside, the first support structure 303 cooperates with the base support 307 to stabilize the heat dissipation device 300 on the base 1, the low-temperature working medium after expansion refrigeration enters the plate heat exchanger 500 through the working medium transmission pipeline 601, and the working medium passage interface 503 guides the working medium to flow between the metal sheet 505; the metal sheet 505 as the core heat exchange part transmits the cold energy to the load side fluid to achieve the refrigeration target; the fastening part 504 fixes the metal sheet 505 to ensure the heat exchange efficiency and sealing performance; The working medium may be mixed with gas and liquid in the cycle, the gas-liquid separator 600 is connected to the working medium circulation pipeline of the refrigerator main body 200 through the working medium transmission pipeline 601, the working medium enters the main body tank cavity 603, and the gas-liquid separation is realized by using the gravity and flow rate change, the gaseous working medium after separation continues to participate in the cycle, and the liquid working medium is temporarily stored in the tank to ensure the purity of the working medium. The control system cabinet 4 is arranged on the base 1 and connected with the refrigerator main body 200, the heat dissipation device 300, the plate heat exchanger 500 and the like through pipelines and cables. The integrated sensor monitors the working medium temperature, pressure, flow, motor 305 speed, equipment vibration and other parameters in real time. The system takes the base 1 as the installation basis, the refrigerator main body 200 completes the heat recovery process of the working medium compression to heat recovery to expansion through the Stirling cycle to realize the conversion of internal energy and mechanical energy; the heat dissipation device 300 discharges the heat end heat, the plate heat exchanger 500 outputs the cold energy to the load, the gas-liquid separator 600 guarantees the purity of the working medium, the control system cabinet 4 intelligently controls, and each part cooperates to complete the ultra-low temperature refrigeration task, adapts to the ship environment demand, and effectively solves the problem that in the heat-driven Stirling refrigerator, the resonator displacement is sensitive to the heating temperature, the refrigeration temperature, the pressure and the like, and a slight change in the parameters will cause the resonator displacement to change greatly, resulting in unstable operation of the refrigerator, and the refrigerator may not work or the amplitude may be far beyond the design value.

[0025] The working principle of the whole device is as follows: the control system cabinet 4 sends a start command, the heat driving source, i.e. the waste heat of the ship, enters the inside of the first shell 202 through the second cooler 208 and the second heat exchange cavity 209, then the crankshaft 220 rotates, the crankshaft 220 is installed in the sleeve 214 of the refrigerator main body 200 through the bearing 221, and converts the rotary motion into the reciprocating linear motion of the piston assembly 204, the gear 222 is linked with the crankshaft 220, coordinates the multi-piston motion, ensures the cycle synchronization, the refrigerator main body 200 is stably installed on the base 1 through the base support 210, the second shell 211 wraps and protects the internal assembly, the supporting partition plate 217 separates the compression cavity and the expansion cavity, and provides a physical space basis for the cycle, which is a heat regenerative cycle of compression to heat regeneration to expansion in the refrigerator main body 200 with helium as the working medium, then the piston assembly 204 reciprocates in the piston motion cavity 213, when the piston moves to one end of the cylinder, the working medium in the space surrounded by the supporting partition plate 217, the end cover 203 and the piston assembly 204 is compressed, the sealing assembly 218 ensures the airtightness between the piston assembly 204 and the cylinder, prevents the working medium from leaking, the compressed working medium is high in temperature and pressure, enters the first heat exchange cavity 205 through the working medium pipeline 201, and then flows into the heat regenerator main body 207 in the heat regenerator installation cavity 212 through the working medium flow guide channel 216, the heat regenerator core 215 is filled with high-heat and high-thermal-conductivity materials such as foamed metal, stores the cold energy of the last cycle, the working medium exchanges heat with the heat regenerator core 215, releases heat, and reduces the temperature, and prepares for subsequent expansion refrigeration; The cooled working medium enters the expansion cavity surrounded by the supporting partition plate 217, the other end cover 203 and the piston assembly 204, and is opposite to the compression cavity, the piston moves in the opposite direction, the working medium expands and does work in the expansion cavity, the temperature and pressure drop sharply, and the refrigeration effect is realized, and the heat absorbed in this process comes from the ship low-temperature cabin; The expanded low-temperature working medium flows through the heat regenerator main body 207 again, absorbs the heat stored in the heat regenerator core 215, the temperature rises again, and returns to the compression cavity through the working medium pipeline 201, and completes a Stirling cycle; In the refrigeration cycle, the heat generated by the compression process and the regenerator heat release stage is transmitted to the heat dissipation device 300 by the working medium, and the heat dissipation device 300 is in communication with the hot end of the refrigerator main body 200 through the refrigerator connecting part 302 and the pipe connecting part 301; the fins 304 increase the heat dissipation area, and the motor 305 drives the heat dissipation fan (air-cooled heat dissipation) through the mounting seat 306 to accelerate the dissipation of heat to the outside, and the first support structure 303 cooperates with the base support 307 to stabilize the heat dissipation device 300 on the base 1. The low-temperature working medium after expansion and refrigeration enters the plate heat exchanger 500 through one of the working medium transmission pipes 601. It should be noted that after being compressed, the working medium will undergo a small amount of liquefaction, and the gas-liquid working medium is guided to flow between the metal sheets 505 by the working medium channel interface 503. The metal sheets 505 serve as the core heat exchange components, and by absorbing heat, most of the liquid helium gas is converted into helium gas again, and the helium gas carrying a small amount of liquid is injected into the gas-liquid separator 600 through another working medium transmission pipe 601, completing gas-liquid separation, and the fastening part 504 fixes the metal sheets 505 to ensure heat exchange efficiency and sealing performance. The separation process of the gas-liquid separator 600 mainly includes the following steps: the working medium enters the main body tank cavity 603, and the gas-liquid separation is realized by using gravity and flow rate change. The gaseous working medium after separation continues to participate in the cycle, and the liquid working medium is temporarily stored in the tank to ensure the purity of the working medium. The treated helium gas is returned to the refrigerator main body 200 again through the working medium transmission pipe 601. The control system cabinet 4 is arranged on the base 1 and connected with the refrigerator main body 200, the heat dissipation device 300, the plate heat exchanger 500, etc. through pipes and cables. The integrated sensor monitors the working medium temperature, pressure, flow rate, motor 305 speed, equipment vibration and other parameters in real time. The system takes the base 1 as the installation basis, the refrigerator main body 200 completes the compression of the working medium to the regenerative expansion through the Stirling cycle, realizes the conversion of internal energy and mechanical energy, the heat dissipation device 300 discharges the heat end heat, the plate heat exchanger 500 outputs cold energy to the load, the gas-liquid separator 600 guarantees the purity of the working medium, and the control system cabinet 4 intelligently controls. Each component cooperates to complete the ultra-low temperature refrigeration task and adapts to the requirements of the ship environment.

[0026] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features, as long as the modifications, equivalent replacements, improvements, etc. are within the spirit and principles of the present application.

Claims

1. A marine Stirling ultra-low temperature first-stage energy-saving refrigeration system, comprising a base (1), characterized in that: The upper portion of the base (1) is provided with a refrigerator body (200), a heat dissipation device (300), a control system cabinet (4), a plate heat exchanger (500), and a gas-liquid separator (600); A refrigerator body (200), the refrigerator body (200) comprising a first cooler (206) and a second cooler (208), the outer walls of the first cooler (206) and the second cooler (208) being connected to a group of first heat exchange chambers (205) and second heat exchange chambers (209) on both sides, and the outer walls of the group of first heat exchange chambers (205) and second heat exchange chambers (209) being connected to a first shell (202) on one side, and acting on the internal components of the first shell (202).

2. The marine Stirling ultra-low temperature primary energy-saving refrigeration system according to claim 1, characterized in that: End covers (203) are connected to both sides of the outer wall of the first shell (202), a piston assembly (204) is installed on one side of the outer wall of the end cover (203), a working fluid pipeline (201) is connected to the outer wall of the first shell (202), and the working fluid pipeline (201) acts on the internal components of the first shell (202), and a regenerator body (207) is installed on the outer wall of the first shell (202).

3. The marine Stirling ultra-low temperature primary energy-saving refrigeration system according to claim 1, characterized in that: A regenerator installation cavity (212) is provided inside the first shell (202), a piston movement cavity (213) is provided inside the regenerator installation cavity (212), sleeves (214) are installed on both sides of the inner surface wall of the regenerator installation cavity (212), a regenerator core (215) is installed on one side of the outer surface wall of a group of sleeves (214), and a second shell (211) is installed on one side of the outer surface wall of the first shell (202).

4. The marine Stirling ultra-low temperature primary energy-saving refrigeration system according to claim 3, characterized in that: The inner surface wall of the piston movement chamber (213) is separated by a supporting partition (217), sealing components (218) are installed on both sides of the inner surface wall of the first shell (202), and a group of guide blocks (219) are installed on both sides of the outer surface wall of the first shell (202).

5. The marine Stirling ultra-low temperature primary energy-saving refrigeration system according to claim 4, characterized in that: A group of crankshafts (220) are rotatably connected between the guide blocks (219), a group of bearings (221) are rotatably connected between the crankshafts (220), and a group of gears (222) are rotatably connected to one side of the inner surface wall of the bearings (221), so as to realize the circulation of the refrigerant and energy conversion.

6. The marine Stirling ultra-low temperature primary energy-saving refrigeration system according to claim 1, characterized in that: A heat dissipation device (300) comprises a pipe connection component (301) and a refrigerator connection component (302); the heat dissipation device (300) is connected to a refrigerator body (200) via the pipe connection component (301) and the refrigerator connection component (302).

7. The marine Stirling ultra-low temperature primary energy-saving refrigeration system according to claim 6, characterized in that: The outer wall of the pipe connecting component (301) and the refrigerator connecting component (302) is connected to a first supporting structure (303), the inner wall of a group of the first supporting structures (303) is installed with a group of fins (304), the outer wall of the first supporting structure (303) is connected to a mounting seat (306), the outer wall of the mounting seat (306) is installed with a motor (305), the bottom of the first supporting structure (303) is installed with a base support (307), and the heat dissipation device (300) is used to dissipate heat generated by the operation of the equipment to ensure the normal operating temperature of the equipment.

8. The marine Stirling ultra-low temperature primary energy-saving refrigeration system according to claim 1, characterized in that: A control system cabinet (4) is installed on the base (1), and the control system cabinet (4) is used to install various electrical components and control systems for controlling the operation of the equipment, thereby realizing operation parameter regulation and status monitoring of components such as the refrigerator body (200) and the heat dissipation device (300).

9. The marine Stirling ultra-low temperature primary energy-saving refrigeration system according to claim 1, characterized in that: A plate heat exchanger (500) includes fixed plates (501), a group of the fixed plates (501) are connected by a group of connecting rods (502), and a group of working medium channel interfaces (503) are provided on both sides of the outer wall of the group of fixed plates (501), which are assembled from metal plates (505) through fastening components (504) and are used to achieve heat exchange between different working media.

10. The marine Stirling ultra-low temperature primary energy-saving refrigeration system according to claim 1, characterized in that: A gas-liquid separator (600) includes two working medium transmission pipelines (601) for constructing a closed passage so that the refrigerator body (200), the plate heat exchanger (500) and the gas-liquid separator (600) are connected in series. An interface (602) is connected to one side of the outer wall of the working medium transmission pipeline (601), a main tank cavity (603) is installed on one side of the outer wall of the interface (602), and a second supporting structure (604) is installed outside the main tank cavity (603). The gas-liquid separator (600) is used to separate gas and liquid in the working medium to ensure the efficient operation of the refrigeration cycle.

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