Heat recovery energy-saving pump-driven two-phase flow system

Abstract

The invention belongs to the technical field of pump-driven two-phase flow, and particularly relates to a heat-recovery energy-saving pump-driven two-phase flow system which comprises an evaporation cold plate, a heat exchanger, a heat exchanger and a heat exchanger. The two ends of the heat regeneration assembly are connected with an evaporation cold plate and a condenser correspondingly, and a loop is formed among the evaporation cold plate, the heat regeneration assembly and the condenser; the heat regeneration assembly comprises a low-temperature guide pipe and a rope paying device, a spiral guide pipe is arranged on the outer side of the low-temperature guide pipe, and the two ends of the spiral guide pipe communicate with the evaporation cold plate and the condenser correspondingly. The rope paying device is used for shrinking the spiral guide pipe so that the spiral guide pipe can abut against the low-temperature guide pipe. The heat recovery energy-saving pump-driven two-phase flow system has the advantages that recovered heat can be recycled, continuous heat supply to the system is not needed, and the resource cost and the energy consumption are reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of pump-driven two-phase flow heat dissipation, and in particular relates to a heat recovery and energy-saving pump-driven two-phase flow system. Background Art

[0002] As semiconductor manufacturing processes enter the nanoscale, the thermal design power consumption of high-performance computing chips has exceeded 500W, and the heat flux density of local hot spots has reached as high as 1000W / cm 2 As mentioned above, while new electronic devices such as artificial intelligence accelerators and 5G communication modules are pursuing increased computing power, their instantaneous thermal load fluctuations can reach 400% of the nominal value, which poses unprecedented challenges to the heat dissipation capacity and dynamic response characteristics of the thermal management system.

[0003] The existing pump-driven two-phase flow system can meet the heat dissipation needs of high-performance computing chips. Its principle is to preheat the working fluid that exchanges heat with the chip to the two-phase critical point. After the working fluid enters the heat exchanger, it boils and exchanges heat, greatly improving the heat exchange performance of the system.

[0004] However, existing pump-driven two-phase systems generally use a continuously operating preheater to preheat the working fluid, which has the following problems: (1) Excessive energy consumption: the preheater needs to continuously consume energy to maintain the working fluid temperature; (2) Thermal efficiency loss: heat loss during the preheating process leads to a decrease in overall energy efficiency. Summary of the Invention

[0005] The purpose of the present invention is to provide a heat recovery and energy-saving pump-driven two-phase flow system to solve the technical problems of high cost and large heat loss caused by continuous use of preheaters for heat dissipation of high-power electronic equipment in traditional pump-driven two-phase flow systems, so as to achieve the purpose of recycling heat and eliminating the need to use preheaters all the time, thereby reducing costs and saving energy.

[0006] In order to solve the above technical problems, the present invention provides a heat recovery and energy-saving pump-driven two-phase flow system, comprising:

[0007] an evaporative cooling plate, wherein a high-temperature working medium flows in the evaporative cooling plate;

[0008] A heat recovery component, wherein both ends of the heat recovery component are connected to the evaporative cold plate and the condenser, respectively, and a loop is formed between the evaporative cold plate, the heat recovery component and the condenser;

[0009] The heat recovery assembly includes: a low-temperature tube and a rope drawer, a spiral tube is provided on the outside of the low-temperature tube, and two ends of the spiral tube are respectively connected to the evaporative cold plate and the condenser;

[0010] The rope-retracting device is used to retract the spiral catheter so that the spiral catheter abuts against the low-temperature catheter.

[0011] Furthermore, the heat recovery assembly further comprises a heat preservation sleeve sleeved on the outside of the cryogenic tube, the spiral tube is embedded in the inner wall of the heat preservation sleeve, and a channel is defined between the spiral tube and the cryogenic tube;

[0012] The outer wall of the thermal insulation sleeve is rotatably connected to the rope-retracting device, and the rope-retracting device is used to shrink the thermal insulation sleeve and compress the spiral catheter so that the outer wall of the spiral catheter abuts against the outer wall of the cryogenic catheter;

[0013] The length of the thermal insulation sleeve is greater than the length of the spiral conduit.

[0014] Furthermore, a retractable rope is wound on the rope-clip device, one end of the retractable rope is connected to the rope-clip device, and the other end of the retractable rope is wound around the outer wall of the thermal insulation sleeve and then connected to the outer wall of the low-temperature catheter.

[0015] Furthermore, the heat recovery component is further connected to a liquid storage tank, the input end of the heat recovery component is connected to the output end of the evaporative cold plate, the output end of the heat recovery component is connected to the condenser and the liquid storage tank in sequence, and the output end of the condenser is connected to the input end of the liquid storage tank;

[0016] The evaporative cold plate, the heat recovery component, the condenser and the liquid storage tank are all connected through pipelines.

[0017] Furthermore, the input end of the spiral conduit is connected to the output end of the evaporative cold plate, and the output end of the spiral conduit is connected to the input end of the condenser;

[0018] The output end of the liquid storage tank is communicated with the output end of the low-temperature conduit, and the input end of the low-temperature conduit is communicated with the output end of the evaporative cold plate.

[0019] Furthermore, the rope-retracting device is connected to an electric control component, and the electric control component includes: a motor and an electromagnetic brake respectively arranged on both sides of the rope-retracting device;

[0020] The motor is used to drive the rope-retracting device to rotate and tighten the retraction rope. After the retraction rope compresses the thermal insulation sleeve and contracts, the spiral catheter abuts against the low-temperature catheter.

[0021] The electromagnetic brake is used to decelerate the rope collector from a rotating state to a stopped state.

[0022] Furthermore, the electronic control assembly further comprises: a preheater connected to the evaporative cooling plate, and temperature sensors respectively connected to the preheater, the motor, and the electromagnetic brake; the preheater is used to supply heat to the evaporative cooling plate;

[0023] The temperature sensor is connected to the preheater, the motor and the electromagnetic brake respectively through feedback signal output, and the temperature sensor is used to transmit signals to drive the preheater, the motor and the electromagnetic brake to open or close.

[0024] Furthermore, a circulation component is provided between the liquid storage tank and the heat recovery component, and the circulation component includes: a throttle valve and a pump which are sequentially arranged along the flow direction of the high-temperature working medium.

[0025] The beneficial effects of the present invention are:

[0026] 1. The present invention sets a heat recovery component and an electronic control component to cooperate with each other. The high-temperature working medium takes away the heat of the product and enters the spiral conduit. The spiral conduit exchanges heat with the low-temperature conduit. The temperature of the spiral conduit decreases and the temperature of the low-temperature conduit increases. The high-temperature working medium enters the condenser to cool down and then enters the liquid storage tank; the low-temperature working medium in the liquid storage tank enters the low-temperature conduit for heat exchange. The temperature of the low-temperature conduit decreases and the temperature of the low-temperature working medium increases. The low-temperature working medium enters the evaporative cold plate. The heat of the product processes the working medium and continues to circulate. This realizes a heat recovery cycle, reduces the resource consumption of the preheater, reduces costs, and improves resource utilization.

[0027] 2. The present invention cooperates with an electric control component by arranging a heat recovery component. When the temperature sensor detects that the working fluid is overheated, the temperature sensor drives the motor to rotate and drive the rope-drawing drum to release the contraction rope, so that the insulation sleeve is relaxed, and the contact area between the high-temperature elastic spiral conduit and the low-temperature conduit is reduced to reduce heat conduction; when the working fluid temperature needs to be increased, the temperature sensor drives the motor to rotate in the opposite direction and drive the rope-drawing drum to tighten the contraction rope, thereby tightening the insulation material and increasing the contact area between the two conduits to enhance heat conduction; by adjusting the contraction and relaxation of the rope in real time according to the working fluid temperature feedback from the temperature sensor, dynamic control of the system working fluid temperature is achieved.

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 It is a structural schematic diagram of the heat recovery and energy-saving pump-driven two-phase flow system of the present invention;

[0031] Figure 22. It is a schematic structural diagram of the heat recovery component of the heat recovery and energy-saving pump-driven two-phase flow system of the present invention;

[0032] Figure 3 This is a diagram showing the internal structure of the thermal insulation sleeve of the heat recovery and energy-saving pump-driven two-phase flow system of the present invention.

[0033] In the picture:

[0034] 1. Evaporative cooling plate; 2. Heat recovery assembly; 21. Cryogenic conduit; 22. Insulation sleeve; 23. Spiral conduit; 24. Rope retractor; 25. Retraction rope; 3. Condenser; 4. Liquid storage tank; 5. Electronic control assembly; 51. Temperature sensor; 52. Preheater; 53. Motor; 54. Electromagnetic brake; 55. Feedback signal output; 6. Circulation assembly; 61. Throttle valve; 62. Pump. DETAILED DESCRIPTION

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0036] Example 1:

[0037] like Figures 1 to 3 As shown, a heat recovery and energy-saving pump-driven two-phase flow system includes: an evaporative cooling plate 1, a heat recovery component 2, a condenser 3 and a liquid storage tank 4. A loop is formed among the evaporative cooling plate 1, the heat recovery component 2, the condenser 3 and the liquid storage tank 4. A high-temperature working medium flows in the evaporative cooling plate 1, passes through the evaporative cooling plate 1, enters the heat recovery component 2, the condenser 3 and the liquid storage tank 4 in sequence, and then flows from the liquid storage tank 4 into the heat recovery component 2 and then into the evaporative cooling plate 1 to complete the cycle.

[0038] Among them, the input end of the heat recovery component 2 is connected with the output end of the evaporative cold plate 1, the output end of the heat recovery component 2 is connected with the condenser 3 and the liquid storage tank 4 in sequence, the output end of the condenser 3 is connected with the input end of the liquid storage tank 4, and the output end of the liquid storage tank 4 is connected with the output end of the heat recovery component 2; the evaporative cold plate 1, the heat recovery component 2, the condenser 3 and the liquid storage tank 4 are all connected through pipelines; the high-temperature working fluid of the evaporative cold plate 1 enters the heat recovery component 2 for heat exchange, enters the condenser 3 for condensation and cooling, and then enters the liquid storage tank 4 for storage, and the low-temperature working fluid in the liquid storage tank 4 enters the evaporative cold plate 1 for circulation after heat exchange through the heat recovery component 2, which reduces costs, realizes heat recovery and improves resource utilization.

[0039] like Figure 2As shown, the heat recovery component 2 includes: a low-temperature tube 21 and a rope drawer 24. A spiral tube 23 is provided on the outside of the low-temperature tube 21. The spiral tube 23 is elastic. When the spiral tube 23 is compressed, the cross-sectional area of ​​the elastic deformation becomes larger, that is, it becomes flat and the length becomes longer. When the compressive force is released, the elastic deformation rebounds to its original shape; the two ends of the spiral tube 23 are connected to the evaporative cold plate 1 and the condenser 3 through pipes respectively, the input end of the spiral tube 23 is connected to the output end of the evaporative cold plate 1, and the output end of the spiral tube 23 is connected to the input end of the condenser 3. The high-temperature working fluid in the evaporative cold plate 1 absorbs the heat of the product and enters the spiral tube 23. The spiral tube 23 can contact with the low-temperature tube 21 to exchange heat, and then the temperature of the high-temperature working fluid is reduced, and the temperature of the low-temperature tube 21 is increased to achieve a heat dissipation effect.

[0040] In this embodiment, the heat recovery component 2 also includes an insulation sleeve 22 that is sleeved on the outside of the low-temperature tube 21, and the spiral tube 23 is embedded in the inner wall of the insulation sleeve 22. The insulation sleeve 22 is made of insulation material and has a good insulation effect to provide insulation for the spiral tube 23; and the insulation sleeve 22 is also elastic. After being elastically deformed by pressure, the flattened cross-sectional area becomes larger and the length becomes larger. After the force is unloaded, the elastic deformation rebounds to its original shape; there is a channel between the spiral tube 23 and the low-temperature tube 21. When the spiral tube 23 and the insulation sleeve 22 are in the original state, that is, in the initial state, there is no contact between the spiral tube 23 and the low-temperature tube 21.

[0041] It should be noted that the rope-drawing device 24 is used to retract the spiral catheter 23 so that the spiral catheter 23 abuts against the low-temperature catheter 21. A retraction rope 25 is wound on the rope-drawing device 24. One end of the retraction rope 25 is connected to the rope-drawing device 24, and the other end of the retraction rope 25 is wound around the outer wall of the thermal insulation sleeve 22 and then connected to the outer wall of the low-temperature catheter 21; the outer wall of the thermal insulation sleeve 22 is rotatably connected to the rope-drawing device 24, and the rope-drawing device 24 is used to retract the thermal insulation sleeve 22 and compress the spiral catheter 23 so that the outer wall of the spiral catheter 23 abuts against the outer wall of the low-temperature catheter 21.

[0042] It should be noted that the two ends of the retraction rope 25 are respectively wrapped around the rope catcher 24 and the insulation sleeve 22. The rope catcher 24 rotates clockwise or counterclockwise to tighten or loosen the retraction rope 25. When the rope catcher 24 tightens the retraction rope 25, the retraction rope 25 compresses the insulation sleeve 22 so that both it and the spiral catheter 23 are elastically deformed, contracted and flattened, thereby making the spiral catheter 23 close to the low-temperature catheter 21. By controlling the tightness of the insulation sleeve 22 to achieve an adjustable contact area between the spiral catheter 23 and the low-temperature catheter 21, dynamic regulation of the heat transfer is achieved; the length of the insulation sleeve 22 is greater than the length of the spiral catheter 23, and the lengths of both ends of the insulation sleeve 22 are greater than the spiral catheter 23, that is, when the insulation sleeve 22 and the spiral catheter 23 are elastically deformed, the insulation sleeve 22 covers the outside of the spiral catheter 23 throughout, ensuring that the spiral catheter 23 is still in the insulation sleeve 22 after shrinkage, thereby achieving a good insulation effect.

[0043] In this embodiment, the input end of the spiral conduit 23 is connected to the output end of the evaporative cold plate 1, and the output end of the spiral conduit 23 is connected to the input end of the condenser 3; the output end of the liquid storage tank 4 is connected to the output end of the low-temperature conduit 21, and the input end of the low-temperature conduit 21 is connected to the output end of the evaporative cold plate 1; after the high-temperature working medium enters the spiral conduit 23, it exchanges heat with the low-temperature conduit 21 and is then cooled to a low-temperature working medium through the condenser 3 and the liquid storage tank 4 in sequence. The low-temperature working medium enters the evaporative cold plate 1 through the low-temperature conduit 21, absorbs the heat of the product, and is heated to a high-temperature working medium, and continues to circulate. Heat is recovered while dissipating heat. There is no need to heat the high-temperature working medium to keep it at the two-phase critical point, thereby reducing energy costs.

[0044] Example 2:

[0045] On the basis of the first embodiment, the rope catcher 24 is connected to the electronic control component 5, which includes: a motor 53 and an electromagnetic brake 54 respectively arranged on both sides of the rope catcher 24; the motor 53 is used to drive the rope catcher 24 to rotate and tighten the retraction rope 25, and the retraction rope 25 compresses the thermal insulation sleeve 22 to shrink, and then the spiral catheter 23 abuts against the low-temperature catheter 21; the electromagnetic brake 54 is used to decelerate the rope catcher 24 from a rotating state to a stopped state.

[0046] The electronic control component 5 also includes: a preheater 52 connected to the evaporative cold plate 1, and a temperature sensor 51 connected to the preheater 52, the motor 53 and the electromagnetic brake 54 respectively; the temperature sensor 51 is connected to the preheater 52, the motor 53 and the electromagnetic brake 54 respectively through a feedback signal output 55, and the temperature sensor 51 is used to transmit a signal to drive the preheater 52, the motor 53 and the electromagnetic brake 54 to open or close.

[0047] It should be noted that the preheater 52 is used to supply heat to the evaporative cold plate 1. The interior of the preheater 52 is an electromagnetic coil structure. By energizing the preheater 52, the evaporative cold plate 1 is heated. After the preheater 52 heats the working medium, the high-temperature working medium flows out of the evaporative cold plate 1 and enters the spiral conduit 23 of the heat recovery device 2. The spiral conduit 23 exchanges heat with the low-temperature conduit 21 and preheats the low-temperature conduit 21. At the same time, it cools down itself and enters the condenser 3. The condensed working medium enters the liquid storage tank 4 and then enters the heat recovery component 2 and the evaporative cold plate 1 in sequence to continue circulating.

[0048] At the same time, after the low-temperature working medium enters the evaporative cold plate 1, the preheater 52 continues to heat the working medium to the two-phase critical point. The product is placed on the evaporative cold plate 1. The working medium in the evaporative cold plate 1 absorbs the heat of the product and changes into a two-phase flow state with a higher temperature. The high-temperature working medium in the two-phase flow state further enters the spiral conduit 23; the working medium is heated to the two-phase critical point before entering the heat recovery component 2, and the latent heat of phase change is high, so the heat exchange capacity is large. At the same time, the working medium is in the boiling heat exchange performance with the best heat exchange performance, which converts the heat exchange mode from passive heat exchange to active heat exchange, and the heat exchange efficiency is much greater than that of the single-phase liquid cooling system.

[0049] According to the principles of heat transfer, during the circulation process, the high-temperature working fluid entering the spiral conduit 23 can meet the heating requirements of the low-temperature working fluid entering the low-temperature conduit 21, heating it to the two-phase critical point. There is no need to subsequently start the preheater 52, which allows the high-temperature working fluid to achieve optimal heat exchange performance while saving energy and reducing costs.

[0050] It should be noted that in order to enable the high-temperature working fluid in the spiral conduit 23 to heat the low-temperature working fluid in the cryogenic conduit 21 to the two-phase critical point, the temperature sensor 51 monitors the temperature of the cryogenic conduit 21. When the temperature sensor 51 detects that the working fluid temperature is not up to standard, there is no direct contact between the spiral conduit 23 and the cryogenic conduit 21, and there is a certain distance between them. At this time, the heat transfer mode is radiation heat exchange, and the heat exchange efficiency is low; the temperature sensor 51 feeds back the signal to the motor 53 through the feedback signal output 55 to drive the rope retractor 24 to retract the retraction rope 25 to tighten the insulation sleeve 22, so that the spiral conduit 23 wrapped in the insulation sleeve 22 produces elastic deformation under pressure and gradually contacts the cryogenic conduit 21. The temperature sensor 51 feeds back the signal to the electromagnetic brake 54 through the feedback signal output 55 to brake the rope retractor 24, so that the retraction rope 25 is fixed, maintaining the contact area between the spiral conduit 23 and the cryogenic conduit 21, and the heat transfer mode gradually changes from radiation heat transfer to conduction heat transfer, and the proportion of conduction heat transfer increases, significantly improving the heat exchange capacity.

[0051] It should be noted that when the temperature sensor 51 detects that the working medium temperature exceeds the requirement, the motor 53 drives the rope retractor 24 to release the retraction rope 25, so that the spiral conduit 23 wrapped in the insulation sleeve 22 loses the rope constraint and gradually restores its initial shape based on its elastic properties, reducing the effective contact area with the low-temperature conduit 21, and the proportion of heat conduction heat transfer mode decreases, thereby reducing the heat transfer amount and lowering the temperature. The temperature sensor 51 outputs the feedback signal 55 to the electromagnetic brake 54 to brake the rope retractor 24, so that the retraction rope 25 is fixed and the contact area between the spiral conduit 23 and the low-temperature conduit 21 is maintained, so that the working medium is always in the two-phase critical state and the optimal heat exchange state to enter the evaporative cold plate 1 to exchange heat with the product; and the temperature sensor 51 is set close to the heat recovery component 2, and the feedback time error is small.

[0052] Example 3:

[0053] On the basis of the second embodiment, a circulation component 6 is provided between the liquid storage tank 4 and the heat recovery component 2. The circulation component 6 includes: a throttle valve 61 and a pump 62 arranged in sequence along the flow direction of the high-temperature working medium. The flow direction of the high-temperature working medium is from the input end to the output end. The low-temperature working medium condensed by the condenser 3 and entering the liquid storage tank 4 is transported to the heat recovery component 2 for heat exchange by opening the throttle valve 61 and the pump 62, and then enters the evaporative cold plate 1 to exchange heat with the product, thereby realizing the circulation of the entire system.

[0054] In summary, the preheater 52 is started to heat the working medium and enter the spiral conduit 23 of the heat recovery component 2 to preheat the low-temperature conduit 21, and then enters the condenser 3 and the liquid storage tank 4 in sequence to obtain low-temperature working medium. The temperature sensor 51 monitors the temperature of the low-temperature conduit 21, and the control motor 53 adjusts the rope retractor 24 to adjust the distance between the spiral conduit 23 and the low-temperature conduit 21 to prevent the low-temperature conduit 21 from overheating; the low-temperature working medium enters the low-temperature conduit 21 through the throttle valve 61 and the pump 62, and the temperature sensor 51 again adjusts the rope retractor 24 to tighten or loosen the retractor 25 to adjust the contact area and heat exchange efficiency between the spiral conduit 23 and the low-temperature conduit 21, so that the low-temperature working medium in the low-temperature conduit 21 is heated to a two-phase critical state by the high-temperature working medium in the spiral conduit 23 and enters the evaporative cold plate 1 to exchange heat with and dissipate heat from the product. The high-temperature working medium absorbs the heat of the product and enters the heat recovery component 2 to realize circulation.

[0055] The various devices selected in this application are all universal standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0056] In the description of the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0057] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0058] With the above-described preferred embodiments of the present invention as a guide, and with reference to the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical scope of this invention. The technical scope of this invention is not limited to the contents of the specification and must be determined according to the scope of the claims.

Claims

1. A heat recovery and energy-saving pump-driven two-phase flow system, characterized in that: include: An evaporative cooling plate (1), wherein a high-temperature working medium flows in the evaporative cooling plate (1); A heat recovery component (2), wherein both ends of the heat recovery component (2) are respectively connected to the evaporative cold plate (1) and the condenser (3), and a loop is formed between the evaporative cold plate (1), the heat recovery component (2) and the condenser (3); The heat recovery assembly (2) comprises: a low-temperature conduit (21) and a rope retractor (24); a spiral conduit (23) is provided on the outside of the low-temperature conduit (21); and two ends of the spiral conduit (23) are respectively connected to the evaporative cold plate (1) and the condenser (3); The rope retractor (24) is used to retract the spiral catheter (23) so that the spiral catheter (23) abuts against the low-temperature catheter (21).

2. A heat recovery and energy-saving pump-driven two-phase flow system according to claim 1, characterized in that: The heat recovery assembly (2) further comprises a heat preservation sleeve (22) sleeved on the outside of the low-temperature conduit (21); the spiral conduit (23) is embedded in the inner wall of the heat preservation sleeve (22); and a channel is provided between the spiral conduit (23) and the low-temperature conduit (21); The outer wall of the thermal insulation sleeve (22) is rotatably connected to the rope-drawing device (24), and the rope-drawing device (24) is used to shrink the thermal insulation sleeve (22) and compress the spiral catheter (23) so that the outer wall of the spiral catheter (23) abuts against the outer wall of the low-temperature catheter (21); The length of the thermal insulation sleeve (22) is greater than the length of the spiral conduit (23).

3. A heat recovery and energy-saving pump-driven two-phase flow system according to claim 2, characterized in that: A retractable rope (25) is wound around the rope-clip device (24), one end of the retractable rope (25) is connected to the rope-clip device (24), and the other end of the retractable rope (25) is wound around the outer wall of the thermal insulation sleeve (22) and then connected to the outer wall of the low-temperature catheter (21).

4. The heat recovery and energy-saving pump-driven two-phase flow system according to claim 1, characterized in that: The heat recovery component (2) is also connected to a liquid storage tank (4); the input end of the heat recovery component (2) is connected to the output end of the evaporative cold plate (1); the output end of the heat recovery component (2) is connected to the condenser (3) and the liquid storage tank (4) in sequence; and the output end of the condenser (3) is connected to the input end of the liquid storage tank (4); The evaporative cold plate (1), the heat recovery component (2), the condenser (3) and the liquid storage tank (4) are all connected via pipelines.

5. The heat recovery and energy-saving pump-driven two-phase flow system according to claim 4, characterized in that: The input end of the spiral conduit (23) is in communication with the output end of the evaporative cold plate (1), and the output end of the spiral conduit (23) is in communication with the input end of the condenser (3); The output end of the liquid storage tank (4) is in communication with the output end of the low-temperature conduit (21), and the input end of the low-temperature conduit (21) is in communication with the output end of the evaporative cold plate (1).

6. The heat recovery and energy-saving pump-driven two-phase flow system according to claim 3, characterized in that: The rope-retracting device (24) is connected to an electric control component (5), and the electric control component (5) comprises: a motor (53) and an electromagnetic brake (54) respectively arranged on both sides of the rope-retracting device (24); The motor (53) is used to drive the rope-retracting device (24) to rotate and tighten the retraction rope (25), and the retraction rope (25) compresses the thermal insulation sleeve (22) to shrink, so that the spiral catheter (23) abuts against the low-temperature catheter (21); The electromagnetic brake (54) is used to decelerate the rope-receiving device (24) from a rotating state to a stopped state.

7. A heat recovery and energy-saving pump-driven two-phase flow system according to claim 6, characterized in that: The electric control assembly (5) further includes: a preheater (52) connected to the evaporative cold plate (1), and a temperature sensor (51) respectively connected to the preheater (52), the motor (53), and the electromagnetic brake (54); the preheater (52) is used to supply heat to the evaporative cold plate (1); The temperature sensor (51) is connected to the preheater (52), the motor (53) and the electromagnetic brake (54) respectively through a feedback signal output (55), and the temperature sensor (51) is used to transmit a signal to drive the preheater (52), the motor (53) and the electromagnetic brake (54) to open or close.

8. The heat recovery and energy-saving pump-driven two-phase flow system according to claim 4, characterized in that: A circulation component (6) is provided between the liquid storage tank (4) and the heat recovery component (2), and the circulation component (6) comprises a throttle valve (61) and a pump (62) which are sequentially arranged along the flow direction of the high-temperature working medium.

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