A compressor hot gas bypass heat preservation device

Abstract

This invention discloses a compressor hot gas bypass insulation device, belonging to the field of refrigeration system insulation technology. The device includes a hot gas bypass pipeline fixedly installed inside the compressor housing. An insulation frame and several insulation components are fixedly mounted on the surface of the hot gas bypass pipeline. The insulation frame contains a phase change heat storage chamber filled with phase change material. The insulation components include an insulation mounting frame and an evaporator tube disposed below it, a heat exchange frame disposed above it, and a condenser frame. The top of the condenser frame extends into the phase change heat storage chamber. A heat-conducting frame, driven up and down by a servo electric cylinder, is movably installed between the evaporator tube and the heat exchange frame to connect or disconnect the heat conduction path between the evaporator tube and the heat exchange frame. This invention actively controls the on / off state of the heat conduction path by driving the heat-conducting frame with a servo electric cylinder, realizing the on-demand collection, storage, and release of hot gas bypass heat, improving heat utilization efficiency, and is suitable for various refrigeration systems requiring hot gas bypass insulation.

Description

Technical Field

[0001] This invention relates to the field of refrigeration system insulation technology, specifically to a compressor hot gas bypass insulation device. Background Technology

[0002] Hot gas bypass technology is an important means of achieving energy regulation and temperature control in refrigeration and heat pump systems. Its basic principle is to bypass a portion of the high-temperature, high-pressure refrigerant vapor discharged from the compressor to the low-pressure side of the system, thereby maintaining stable system operation and achieving heating or insulation functions under low-load conditions. In applications such as transportation insulation, temperature control of environmental testing equipment, and heat pump defrosting, hot gas bypass technology is widely used due to its simple structure and effective regulation. However, existing hot gas bypass insulation devices still have many shortcomings in practical applications. First, during the transportation of high-temperature refrigerant vapor, heat is significantly lost along the pipeline, with a large amount of heat energy being lost to the surrounding environment before reaching the insulation or heating target, resulting in low heat utilization efficiency.

[0003] Chinese patent CN206755674U discloses a defrosting structure combining waste heat storage and hot gas bypass in a refrigeration compressor casing. This structure installs a phase change heat storage bag, a hot gas bypass pipe, and a refrigerant superheat bypass pipe in a compression refrigeration system, utilizing waste heat from the compressor casing for heat storage and defrosting. This solution installs fins on the refrigerant superheat bypass pipe to enhance heat exchange and, to some extent, solves the problem of unsatisfactory thermal conductivity of the phase change heat storage material. However, the heat storage and release process of the phase change heat storage bag relies on continuous thermal contact between the refrigerant superheat bypass pipe and the heat storage material. It cannot cut off or connect the heat conduction path as needed, leading to an uncontrollable heat storage process. Even after heat storage saturation, excess heat continues to be input, resulting in waste. Furthermore, this solution lacks real-time monitoring and feedback adjustment methods for the heat storage state, and cannot dynamically adjust the heat storage or release behavior according to the actual saturation level of the heat storage material, resulting in relatively crude energy management. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a compressor hot gas bypass insulation device.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a compressor hot gas bypass insulation device, comprising a fixed mounting bracket fixedly disposed inside the compressor housing, a hot gas bypass pipeline disposed inside the fixed mounting bracket; an insulation frame fixedly disposed on the surface of the hot gas bypass pipeline, the insulation frame having a phase change heat storage chamber filled with phase change material inside; and an insulation component disposed on the surface of the hot gas bypass pipeline; the insulation component includes an insulation mounting bracket fixedly disposed on the outer periphery of the hot gas bypass pipeline, an evaporator tube disposed below the interior of the insulation mounting bracket, a heat exchange frame disposed above the interior of the insulation mounting bracket, and a condenser frame connected to the heat exchange frame and extending into the phase change heat storage chamber; the insulation component further includes: A heat-conducting frame is movable between the evaporator tube and the heat exchanger frame. The heat-conducting frame is movably installed inside the insulation mounting frame to establish or disconnect the heat conduction path between the evaporator tube and the heat exchanger frame. A servo electric cylinder is fixedly installed on the insulation mounting frame. The drive end of the servo electric cylinder is connected to the heat-conducting frame to drive the heat-conducting frame to move up and down, thereby controlling the opening and closing of the heat conduction path.

[0006] Furthermore, the bottom of the evaporator tube is in contact with the outer circumference of the hot gas bypass pipe through a heat-conducting plate, and the evaporator tube is provided with a heat exchange channel for the flow of the heat-conducting working fluid.

[0007] Furthermore, the top of the heat-conducting plate is fixedly provided with a plurality of first fins, the tops of which extend into the interior of the heat exchange channel.

[0008] Furthermore, the top of the heat-conducting frame is fixedly provided with several second fins, the tops of which extend into the interior of the heat exchange frame, and the several second fins are slidably arranged up and down with the interior of the heat exchange frame.

[0009] Furthermore, the top of the heat-conducting frame is fixedly provided with several second fins, the tops of which extend into the interior of the heat exchange frame, and the several second fins are slidably arranged up and down with the interior of the heat exchange frame.

[0010] Furthermore, one end of the evaporator tube is fixedly provided with a flow guide joint, and the other end is fixedly provided with a flow guide interface that cooperates with the flow guide joint. The two ends of the heat exchange channel are respectively connected to the flow guide joint and the flow guide interface. Two adjacent heat-insulating mounting brackets are connected in series through the flow guide joint and the flow guide interface.

[0011] Furthermore, the upper and lower sides of the fixed mounting frame are both fixedly provided with fixed support frames for supporting the hot gas bypass pipeline; both sides of the fixed mounting frame are fixedly provided with medium conveying frames, and one side of each medium conveying frame is fixedly provided with a medium conveying pipe. Both medium conveying frames on both sides are connected to the interior of the insulation components located on both sides through several guide pipes.

[0012] Furthermore, the insulation frame comprises, from the inside out, an insulation layer, a moisture-proof layer, and a protective layer, with the phase change heat storage cavity disposed inside the insulation layer.

[0013] Furthermore, a temperature sensor is also embedded inside the phase change heat storage cavity. The temperature sensor is electrically connected to the controller, and the controller controls the action of the servo electric cylinder based on the phase change material temperature signal fed back by the temperature sensor.

[0014] Furthermore, an electric heating cable or a steam heating pipeline is also integrated within the insulation layer. The electric heating cable or steam heating pipeline is arranged along the axial direction of the hot gas bypass pipeline and is located between the insulation layer and the hot gas bypass pipeline.

[0015] The beneficial effects achieved by the present invention using the above structure are as follows: 1. By arranging the insulation rack and insulation components on the outer circumference of the hot gas bypass pipeline, and using heat-conducting fins and the first fin to efficiently conduct the heat from the pipeline wall to the heat pipe working fluid in the evaporator tube, the waste heat that would otherwise dissipate outward along the pipeline is actively collected and guided into the heat storage path. This avoids the problem of heat being directly lost into the internal space of the compressor housing in traditional structures, thereby significantly improving the utilization efficiency of the hot gas bypass heat. At the same time, a phase change heat storage cavity filled with phase change material is set inside the insulation layer. Utilizing the physical property of phase change material to absorb or release a large amount of latent heat during the solid-liquid phase change process, the collected excess heat is stored in the phase change heat storage cavity as latent heat. When the pipeline temperature drops, the stored heat is released back to the pipeline through the reverse heat transfer path, realizing the spatial and temporal transfer and on-demand allocation of heat. This effectively solves the problem of traditional passive insulation structures having no heat available when needed and wasting heat when not needed.

[0016] 2. By installing a heat-conducting frame that can be moved up and down by a servo-driven electric cylinder between the evaporator tube and the heat exchange frame, the heat collected by the evaporator tube must be transferred to the heat exchange frame and condenser frame through physical contact with the heat-conducting frame before entering the phase change heat storage chamber. This makes the connection and disconnection of the heat conduction path actively controllable. When the temperature sensor detects that the phase change material has reached the heat storage saturation state, the controller instructs the servo-driven electric cylinder to drive the heat-conducting frame to move upward to disconnect the heat path, preventing excess heat from continuing to be input, which would cause the heat storage material to overheat and waste energy. When the phase change material's heat storage is exhausted and needs to be replenished, the controller instructs the servo-driven electric cylinder to drive the heat-conducting frame to move downward to reconnect the heat path, restoring the transfer of heat to the phase change heat storage chamber. This transforms the heat storage process from uncontrollable natural heat conduction to precisely controllable on-demand heat storage, improving the service life of the phase change heat storage material.

[0017] 3. By installing second and third fins on the heat-conducting frame and condenser frame respectively, the second fin moves up and down with the heat-conducting frame and always maintains sliding contact with the heat exchange frame. When the heat-conducting frame is connected to the heat path, the effective area for heat transfer from the heat-conducting frame to the heat exchange frame is significantly increased. The third fin, in conjunction with the baffle plate, changes the flow path around the phase change material in the phase change heat storage chamber and increases the disturbance. The two measures work together to significantly reduce the thermal resistance of the entire heat transfer chain from the evaporator to the phase change material and significantly accelerate the heat storage speed. At the same time, electric heating tape or steam heating pipeline is integrated into the insulation layer. In extreme low temperature environments, it can actively supplement heat to the pipeline and prevent the medium in the pipeline from freezing or waxing and clogging. This allows the device to maintain normal operation capability under severe cold conditions. The three-layer composite structure of the insulation frame's protective layer, moisture-proof layer and insulation layer continuously reduces heat loss to the external environment throughout the entire operation cycle of the device. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of a compressor hot gas bypass insulation device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of the mounting bracket according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the insulation rack structure according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the thermal insulation component structure according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the internal structure of the insulation rack according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the thermal insulation mounting frame structure according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the internal structure of the thermal insulation mounting bracket according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of the evaporator tube, heat exchange rack, and condenser rack according to an embodiment of the present invention; Figure 9 This is a top view of the internal structure of the evaporator tube in an embodiment of the present invention.

[0019] In the diagram, 1. Fixed mounting bracket; 2. Hot gas bypass pipeline; 3. Fixed support bracket; 4. Medium conveying bracket; 5. Medium conveying pipe; 6. Insulation bracket; 7. Protective layer; 8. Moisture-proof layer; 9. Insulation layer; 10. Insulation component; 11. Flow guide joint; 12. Flow guide interface; 13. Phase change heat storage chamber; 14. Insulation mounting bracket; 15. Heat-conducting fin; 16. Evaporator tube; 17. Heat exchange bracket; 18. Heat-conducting bracket; 19. Servo electric cylinder; 20. Condensation bracket; 21. First fin; 22. Second fin; 23. Third fin; 24. Heat exchange flow channel. Detailed Implementation

[0020] This invention relates to a compressor hot gas bypass insulation device, which is particularly suitable for the insulation and heat recovery of hot gas bypass pipelines in refrigeration systems. It achieves efficient collection, transmission and storage of heat in bypass pipelines through a three-in-one composite structure of fins, heat pipes and phase change heat storage, ensuring effective management and on-demand release of hot gas bypass heat during compressor operation.

[0021] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that these embodiments are intended to fully disclose the content of the present invention, but should not be construed as limiting the scope of protection. Those skilled in the art can make modifications or adjustments within the spirit of the present invention.

[0022] As described in the background section, there are shortcomings in the existing technology. In order to solve the above-mentioned technical problems, this application proposes a compressor hot gas bypass insulation device.

[0023] Example 1:

[0024] like Figures 1 to 9 As shown, a compressor hot gas bypass insulation device includes a fixed mounting bracket 1 located inside the compressor housing. The fixed mounting bracket 1 consists of upper and lower parts, and fixed support brackets 3 are fixedly installed on both the upper and lower sides inside the fixed mounting bracket 1. A hot gas bypass pipe 2 is also fixedly installed inside the fixed mounting bracket 1, and the surface of the hot gas bypass pipe 2 is in contact with the inside of the fixed support bracket 3. The fixed support bracket 3 is used to fix the position of the hot gas bypass pipe 2 inside the fixed mounting bracket 1.

[0025] It also includes an insulation frame 6 fixedly installed on the surface of the hot gas bypass pipe 2, and several insulation components 10 fixedly installed on the surface of the hot gas bypass pipe 2. Through the combined action of the insulation frame 6 and the insulation components 10, heat inside the hot gas bypass pipe 2 is absorbed, and when needed, the absorbed heat is released back to the hot gas bypass pipe 2.

[0026] Medium conveying frames 4 are fixedly installed on both sides inside the fixed mounting bracket 1, and medium conveying pipes 5 are fixedly installed on one side of each medium conveying frame 4. The medium conveying frames 4 on both sides are connected to the interior of the insulation components 10 on both sides through several guide pipes. The heat pipe working fluid is transported into the interior of the medium conveying frame 4 through the medium conveying pipes 5, and the heat pipe working fluid is sent into the interior of several insulation components 10 through the medium conveying frame 4. The heat pipe working fluid absorbs and stores the heat inside the hot gas bypass pipe 2.

[0027] Specifically, the insulation frame 6 consists of a protective layer 7, a moisture-proof layer 8, and an insulation layer 9. The insulation layer 9 is fixedly installed on the outside of the hot gas bypass pipe 2, the moisture-proof layer 8 is fixedly installed on the outside of the insulation layer 9, and the protective layer 7 is fixedly installed on the outside of the moisture-proof layer 8. The insulation layer 9 also has several phase change heat storage chambers 13 inside, and the phase change heat storage chambers 13 are filled with phase change material.

[0028] Furthermore, the insulation component 10 includes an insulation mounting bracket 14 fixedly disposed on the surface of the hot gas bypass pipe 2, an evaporator 16 fixedly disposed inside the lower part of the insulation mounting bracket 14, a flow guide connector 11 fixedly disposed on the left side of the evaporator 16, and a flow guide interface 12 that mates with the flow guide connector 11 on the right side of the evaporator 16. A heat-conducting plate 15 is fixedly disposed at the bottom of the insulation mounting bracket 14, the top of the heat-conducting plate 15 is in contact with the bottom of the evaporator 16, and the bottom surface of the heat-conducting plate 15 is in close contact with the outer peripheral surface of the hot gas bypass pipe 2. A heat exchange channel 24 is provided inside the evaporator tube 16. The two ends of the heat exchange channel 24 are connected to the flow guide joint 11 and the flow guide interface 12, respectively. Two adjacent heat-insulating mounting brackets 14 are connected through the flow guide joint 11 and the flow guide interface 12, so that several heat-insulating mounting brackets 14 cover the surface of the hot gas bypass pipe 2. With the connection between the flow guide joint 11 and the flow guide interface 12, the heat pipe working fluid flows in the heat exchange channel 24 inside the several evaporator tubes 16, and the heat-conducting plate 15 automatically absorbs the heat inside the hot gas bypass pipe 2.

[0029] Furthermore, two heat exchange racks 17 are fixedly installed above the interior of the heat exchange rack 14, and a condenser rack 20 is fixedly installed on top of the heat exchange racks 17. The top of the condenser rack 20 extends into the interior of the phase change heat storage chamber 13, and the interior of the condenser rack 20 is filled with an evaporating working fluid.

[0030] Furthermore, a heat-conducting frame 18 is movably installed inside the insulation mounting bracket 14. A servo electric cylinder 19 is fixedly installed above the insulation mounting bracket 14 to drive the heat-conducting frame 18 to move up and down. The top of the heat-conducting frame 18 slides in contact with the surfaces of the two heat exchange brackets 17. The heat-conducting frame 18 is moved downward by the drive end of the servo electric cylinder 19 until the bottom of the heat-conducting frame 18 contacts the top surface of the evaporation tube 16. The heat-conducting frame 18 transfers the heat generated inside the evaporation tube 16 to the inside of the heat exchange bracket 17, thereby causing the evaporating working fluid inside the condenser bracket 20 to evaporate. After evaporation, the working fluid condenses inside the condenser bracket 20, and the phase change material inside the phase change heat storage chamber 13 absorbs and stores the heat generated after condensation. The heat-conducting frame 18 is controlled by the drive end of the servo electric cylinder 19 to switch the heat conduction between the evaporation tube 16 and the heat exchange bracket 17.

[0031] To further improve the heat absorption and processing effect inside the hot gas bypass pipe 2, several first fins 21 can be fixedly provided on the top of the heat-conducting plate 15, with the tips of the first fins 21 extending into the interior of the heat exchange channel 24. The heat absorbed by the heat-conducting plate 15 is transferred to the interior of the heat exchange channel 24 through the several first fins 21, and the heat pipe working fluid flowing inside the heat exchange channel 24 rapidly absorbs the heat inside the hot gas bypass pipe 2.

[0032] Several second fins 22 can also be fixedly installed on the top of the heat conduction frame 18. The tops of the second fins 22 all extend into the interior of the heat exchange frame 17, and the several second fins 22 are slidably arranged up and down with the interior of the heat exchange frame 17. By setting several second fins 22 on the top of the heat conduction frame 18, the heat conduction frame 18 can conduct heat between the evaporator tube 16 and the heat exchange frame 17, and the combination of several second fins 22 can further improve the heat conduction efficiency.

[0033] A third fin 23 can also be fixedly provided on the surface of the condenser rack 20, and the third fin 23 is also provided with a baffle inside the phase change heat storage cavity 13, which can change the fluid path and increase turbulence, thereby enhancing heat transfer.

[0034] To further improve the heat utilization efficiency of the hot gas bypass pipe 2, several heat exchange fins can be installed inside the insulation layer 9 and close to the outer wall of the hot gas bypass pipe 2. These heat exchange fins extend along the axial direction of the hot gas bypass pipe 2 and are distributed circumferentially to increase the heat exchange area between the outer wall of the pipe and the air inside the insulation layer 9, thereby accelerating the transfer of heat to the phase change heat storage chamber 13.

[0035] Furthermore, a phase change heat storage material can be embedded within the insulation layer 9. This phase change heat storage material fills the phase change heat storage cavity 13, and its phase change temperature is selected according to the operating temperature range of the hot gas bypass pipe 2. When the temperature of the hot gas bypass pipe 2 is higher than the phase change temperature, the phase change material absorbs heat and melts, storing latent heat; when the temperature of the hot gas bypass pipe 2 is lower than the phase change temperature, the phase change material releases heat and solidifies, releasing the stored heat back to the hot gas bypass pipe 2, thereby achieving peak shaving and valley filling of heat and on-demand supply.

[0036] Furthermore, for extreme low-temperature environments, an electric heating cable or a steam heating pipeline can be integrated into the insulation layer 9. This electric heating cable or steam heating pipeline is arranged axially along the hot gas bypass pipeline 2 and is located between the insulation layer 9 and the hot gas bypass pipeline 2. It is used to actively replenish heat under extreme low-temperature conditions, prevent the medium in the pipeline from freezing or becoming blocked by wax, and ensure the reliability of the hot gas bypass function in harsh environments.

[0037] Furthermore, the two ends of the hot gas bypass pipe 2 are connected to the high-pressure side and the low-pressure side of the refrigeration system, respectively. Specifically, one end of the hot gas bypass pipe 2 is connected to the pipe between the compressor discharge port and the condenser inlet, and the other end is connected to the pipe between the expansion valve and the evaporator inlet, or directly connected to the compressor suction pipe. When the compressor suction pressure is lower than the preset value, the hot gas bypass valve opens, and high-temperature, high-pressure refrigerant vapor bypasses to the low-pressure side through the hot gas bypass pipe 2, realizing the system's energy regulation and heat preservation functions.

[0038] Furthermore, to achieve real-time monitoring of the heat storage state of the phase change thermal storage material, several temperature sensors can be embedded inside the phase change thermal storage chamber 13. These temperature sensors are electrically connected to the controller, which determines the heat storage saturation of the phase change thermal storage material based on the temperature signal of the phase change material fed back by the temperature sensors. When the phase change material is detected to be nearly completely melted, the controller automatically controls the servo cylinder 19 to drive the heat conduction frame 18 upwards, disconnecting the heat conduction path between the evaporation tube 16 and the heat exchange frame 17; when the phase change material is detected to be completely solidified, the controller automatically controls the servo cylinder 19 to drive the heat conduction frame 18 downwards, reconnecting the heat conduction path, thus achieving automatic control of heat storage and release.

[0039] Furthermore, the fixed mounting bracket 1, fixed support bracket 3, insulation mounting bracket 14, heat-conducting fin 15, evaporator tube 16, heat exchange bracket 17, heat-conducting bracket 18, condenser bracket 20, first fin 21, second fin 22, and third fin 23 can all be made of high thermal conductivity metal materials, preferably copper or aluminum alloy, to reduce thermal resistance and improve heat transfer efficiency. The insulation layer 9 can be made of low thermal conductivity materials such as polyurethane foam, aerogel, or glass wool to reduce heat loss to the external environment. The protective layer 7 can be made of stainless steel or galvanized steel sheet to protect the internal structure from mechanical damage.

[0040] During assembly, the hot gas bypass pipe 2 is first fixedly installed inside the fixed mounting frame 1 using the fixed support frame 3. Then, the protective layer 7, moisture-proof layer 8, and insulation layer 9 of the insulation frame 6 are sequentially wrapped around the outer surface of the hot gas bypass pipe 2. Before wrapping the insulation layer 9, several insulation components 10 are arranged sequentially along the axial direction of the hot gas bypass pipe 2, ensuring the bottom surface of the heat-conducting plate 15 is in contact with the outer circumferential surface of the hot gas bypass pipe 2. The evaporator tubes 16 inside adjacent insulation mounting frames 14 are then connected in series via the flow guide joints 11 and flow guide interfaces 12. The flow guide joints 11 and flow guide interfaces 12 at both ends of the series-connected evaporator tubes 16 are then connected to the medium transport frames 4 on both sides via flow guide pipes. The medium transport pipe 5 is then connected to the external heat pipe working fluid supply system, completing the construction of the heat pipe working fluid circulation loop. The servo electric cylinder 19 is fixedly installed above the interior of the heat-insulating mounting bracket 14, and the heat-conducting bracket 18 is installed on the drive end of the servo electric cylinder 19, so that the top of the heat-conducting bracket 18 slides in contact with the surface of the heat exchange bracket 17, and the bottom can selectively contact the top surface of the evaporation tube 16. Finally, the top of the condenser bracket 20 is extended into the interior of the phase change heat storage chamber 13, and the interior of the condenser bracket 20 is filled with evaporating working fluid, completing the assembly of the entire device.

[0041] The working principle of the compressor hot gas bypass insulation device is as follows: Step 1: After the compressor starts running, high-temperature and high-pressure refrigerant vapor is discharged from the compressor exhaust port and enters the hot gas bypass pipe 2 through the pipe between the compressor exhaust port and the condenser inlet. The high-temperature refrigerant vapor inside the hot gas bypass pipe 2 transfers the heat it carries to the outside through the pipe wall, causing the temperature of the outer circumference of the hot gas bypass pipe 2 to rise.

[0042] Step 2: The bottom surface of the heat-conducting plate 15 is in contact with the outer peripheral surface of the hot gas bypass pipe 2. The heat from the pipe wall of the hot gas bypass pipe 2 is first transferred to the heat-conducting plate 15 through heat conduction. The heat-conducting plate 15 transfers the heat to several first fins 21 fixedly set on its top. The tops of the several first fins 21 extend into the heat exchange channel 24 inside the evaporator tube 16. The heat is quickly transferred to the heat pipe working fluid flowing in the heat exchange channel 24 through the several first fins 21, realizing the efficient collection of heat from the hot gas bypass pipe 2.

[0043] Step 3: The servo cylinder 19 located inside the upper part of the heat-insulating mounting bracket 14 extends downward according to the controller command, pushing the heat-conducting bracket 18 downward along the inside of the heat-insulating mounting bracket 14 until the bottom of the heat-conducting bracket 18 is in close contact with the top surface of the evaporating tube 16. At this time, the heat conduction path between the evaporating tube 16 and the heat exchange bracket 17 is connected. The heat carried by the heat pipe working fluid heated in the heat exchange channel 24 of the evaporating tube 16 is transferred through the heat-conducting bracket 18 to several second fins 22 located at the top of the heat-conducting bracket 18. The tops of several second fins 22 all extend into the inside of the heat exchange bracket 17, and the heat is further transferred to the heat exchange bracket 17 through several second fins 22.

[0044] Step 4: After the heat exchange rack 17 obtains heat, it transfers it to the condenser rack 20 fixedly installed on the top of the heat exchange rack 17. The top of the condenser rack 20 extends into the interior of the phase change heat storage chamber 13, and the interior of the condenser rack 20 is filled with an evaporating working fluid. After the condenser rack 20 obtains heat, the evaporating working fluid inside it is heated and evaporated. The evaporated working fluid vapor rises to the part of the condenser rack 20 located inside the phase change heat storage chamber 13. In the relatively low temperature environment of the phase change heat storage chamber 13, the evaporating working fluid vapor condenses and releases heat on the surface of the condenser rack 20, releasing the heat to the phase change material inside the phase change heat storage chamber 13.

[0045] Step 5: After the phase change material inside the phase change heat storage chamber 13 absorbs the heat released by the condenser rack 20, when the temperature of the phase change material reaches its phase change temperature, the phase change material gradually melts from a solid state to a liquid state, storing the heat inside the phase change material in the form of latent heat. During this process, the third fin 23 fixedly set on the surface of the condenser rack 20 and the baffle plate set on the third fin 23 enhance the heat exchange efficiency between the condenser rack 20 and the phase change material by changing the fluid path around the phase change material and increasing the disturbance, thereby accelerating the heat storage process.

[0046] Step Six: The temperature sensor embedded inside the phase change heat storage chamber 13 monitors the temperature of the phase change material in real time and feeds back the temperature signal to the controller electrically connected to the temperature sensor. The controller determines the heat storage saturation of the phase change material based on the received temperature signal. When the controller detects that the phase change material has reached the heat storage saturation state, the controller issues a control command to retract the drive end of the servo cylinder 19 upward, pulling the heat conduction frame 18 upward along the inside of the insulation mounting frame 14, so that the bottom of the heat conduction frame 18 is no longer in contact with the top surface of the evaporation tube 16. At this time, the heat conduction path between the evaporation tube 16 and the heat exchange frame 17 is disconnected, and the heat from the hot gas bypass pipe 2 no longer continues to be transferred to the phase change heat storage chamber 13, avoiding overheating of the phase change material and heat waste.

[0047] Step 7: When the compressor stops or the temperature of the hot gas bypass pipe 2 is lower than the temperature of the phase change material, the controller determines that the phase change material has entered a heat-releasing state based on the signal feedback from the temperature sensor. The controller issues a control command to make the drive end of the servo cylinder 19 extend downward again, pushing the heat conduction frame 18 downward to contact the top surface of the evaporator tube 16, reconnecting the heat conduction path between the evaporator tube 16 and the heat exchange frame 17. The heat stored in the phase change material in the phase change heat storage chamber 13 is sequentially transferred to the evaporator tube 16 through the condenser frame 20, the heat exchange frame 17, the second fin 22, and the heat conduction frame 18, and then transferred back to the hot gas bypass pipe 2 through the heat conduction plate 15 and the first fin 21, thereby replenishing the heat insulation of the hot gas bypass pipe 2.

[0048] Step 8: In extreme low temperature environments, when the heat of the hot gas bypass pipe 2 itself and the heat released by the phase change material in the phase change heat storage chamber 13 are insufficient to maintain the temperature of the hot gas bypass pipe 2, the electric heating tape or steam heating pipeline integrated between the insulation layer 9 and the hot gas bypass pipe 2 is activated to actively supplement heat along the axial direction of the hot gas bypass pipe 2, preventing the medium inside the hot gas bypass pipe 2 from freezing or becoming blocked by wax due to excessively low temperature, and ensuring the smooth flow of the hot gas bypass pipe 2 in harsh environments.

[0049] Step Nine: Throughout the entire operation of the device, the insulation layer 9 of the insulation rack 6 provides thermal insulation for the hot gas bypass pipe 2 and the phase change heat storage chamber 13, reducing heat loss to the internal space of the compressor housing; the moisture-proof layer 8 prevents external moisture from seeping into the insulation layer 9, which would reduce the insulation performance; the protective layer 7 protects the internal structure of the insulation rack 6 to avoid mechanical damage; the medium conveying pipe 5 and the medium conveying rack 4 are connected to the heat exchange channels 24 of each insulation component 10 through the guide pipe, continuously replenishing the heat pipe working fluid into the evaporation pipe 16, maintaining the circulation of the heat pipe working fluid in the heat exchange channel 24, and ensuring the device's continuous collection and on-demand release of heat from the hot gas bypass pipe 2.

[0050] The ingenuity of this invention lies in integrating multiple functions, including direct contact heat absorption between the heat-conducting plate 15 and the first fin 21, flow heat exchange of the heat pipe working fluid within the evaporator tube 16, controllable on / off switching of the servo electric cylinder 19 of the heat-conducting frame 18, evaporation and condensation heat exchange between the heat exchange frame 17 and the condenser frame 20, latent heat storage and release in the phase change heat storage chamber 13, and heat insulation of the insulation layer 9. Through structural optimization, it achieves efficient collection, on-demand transmission, and intelligent control of heat from the hot gas bypass pipe 2. The first fin 21 improves the heat transfer efficiency of the heat-conducting plate 15 to the heat pipe working fluid in the heat exchange channel 24; the second fin 22 improves the heat transfer efficiency of the heat-conducting frame 18 to the heat exchange frame 17; and the third fin 23 and the baffle plate improve the heat release efficiency of the phase change material in the phase change heat storage chamber 13 from the condenser frame 20. The servo electric cylinder 19 controls the up-and-down movement of the heat transfer frame 18, enabling intelligent switching of heat transfer between the evaporator tube 16 and the heat exchange frame 17, thus preventing reverse heat loss from the phase change material when not needed. The phase change heat storage material achieves peak shaving and valley filling of heat and on-demand supply. Electric heating tape or steam heating pipelines ensure system reliability in extreme low-temperature environments. All components operate inside the compressor housing, resulting in a compact structure and high reliability, making it particularly suitable for refrigeration systems with strict space and safety requirements.

[0051] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A compressor hot gas bypass insulation device, comprising a fixed mounting bracket (1) fixedly disposed inside the compressor housing, a hot gas bypass pipeline (2) disposed inside the fixed mounting bracket (1); an insulation frame (6) fixedly disposed on the surface of the hot gas bypass pipeline (2), the insulation frame (6) having a phase change heat storage chamber (13) filled with phase change material inside; and an insulation component (10) disposed on the surface of the hot gas bypass pipeline (2); the insulation component (10) comprising an insulation mounting bracket (14) fixedly disposed on the outer periphery of the hot gas bypass pipeline (2), an evaporator (16) disposed below the interior of the insulation mounting bracket (14), a heat exchange frame (17) disposed above the interior of the insulation mounting bracket (14), and a condenser frame (20) connected to the heat exchange frame (17) and extending into the interior of the phase change heat storage chamber (13); characterized in that, The insulation component (10) also includes: A heat-conducting frame (18) is movable between the evaporator tube (16) and the heat exchange rack (17). The heat-conducting frame (18) is movable inside the heat-insulating mounting rack (14) and is used to establish or disconnect the heat conduction path between the evaporator tube (16) and the heat exchange rack (17). A servo electric cylinder (19) is fixedly installed on the heat-insulating mounting rack (14). The drive end of the servo electric cylinder (19) is connected to the heat-conducting frame (18) and is used to drive the heat-conducting frame (18) to move up and down to control the opening and closing of the heat conduction path.

2. The compressor hot gas bypass insulation device according to claim 1, characterized in that, The bottom of the evaporator tube (16) is in contact with the outer circumference of the hot gas bypass pipe (2) through the heat-conducting plate (15), and the evaporator tube (16) is provided with a heat exchange channel (24) for the flow of heat-conducting working fluid.

3. The compressor hot gas bypass insulation device according to claim 2, characterized in that, The top of the heat-conducting plate (15) is fixedly provided with a number of first fins (21), and the top of the number of first fins (21) extends into the interior of the heat exchange channel (24).

4. The compressor hot gas bypass insulation device according to claim 1, characterized in that, The top of the heat-conducting frame (18) is fixedly provided with several second fins (22), the tops of the several second fins (22) extend into the interior of the heat exchange frame (17), and the several second fins (22) slide up and down with the interior of the heat exchange frame (17).

5. The compressor hot gas bypass insulation device according to claim 1, characterized in that, The surface of the condenser (20) is fixedly provided with a third fin (23), which is located inside the phase change heat storage cavity (13), and a baffle is also provided on the third fin (23).

6. The compressor hot gas bypass insulation device according to claim 1, characterized in that, One end of the evaporator tube (16) is fixedly provided with a flow guide joint (11), and the other end is fixedly provided with a flow guide interface (12) that cooperates with the flow guide joint (11). The two ends of the heat exchange channel (24) are respectively connected to the flow guide joint (11) and the flow guide interface (12). Two adjacent heat insulation mounting brackets (14) are connected in series through the flow guide joint (11) and the flow guide interface (12).

7. The compressor hot gas bypass insulation device according to claim 1, characterized in that, The fixed mounting bracket (1) is fixedly provided with fixed support brackets (3) for supporting hot gas bypass pipe (2) on both the upper and lower sides inside; the fixed mounting bracket (1) is fixedly provided with medium conveying brackets (4) on both sides inside; the two medium conveying brackets (4) are fixedly provided with medium conveying pipes (5) on one side; the medium conveying brackets (4) on both sides are connected to the interior of the heat insulation components (10) located on both sides through several guide pipes.

8. The compressor hot gas bypass insulation device according to claim 1, characterized in that, The heat preservation frame (6) includes, from the inside out, a heat preservation layer (9), a moisture-proof layer (8) and a protective layer (7), and the phase change heat storage cavity (13) is located inside the heat preservation layer (9).

9. The compressor hot gas bypass insulation device according to claim 1, characterized in that, A temperature sensor is also embedded inside the phase change heat storage chamber (13). The temperature sensor is electrically connected to the controller. The controller controls the servo electric cylinder (19) to operate based on the phase change material temperature signal fed back by the temperature sensor.

10. The compressor hot gas bypass insulation device according to claim 8, characterized in that, The insulation layer (9) is also integrated with an electric heating cable or a steam heating pipeline. The electric heating cable or steam heating pipeline is arranged along the axial direction of the hot gas bypass pipeline (2) and is located between the insulation layer (9) and the hot gas bypass pipeline (2).

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