A liquid-cooled unit with an integrated module of electronic expansion valve and plate heat exchanger

Abstract

This utility model relates to the field of liquid cooling unit technology and discloses a liquid cooling unit with an integrated module of electronic expansion valve and plate heat exchanger. It includes a compressor, the output end of which is connected to one end of the electronic expansion valve via a pipe through a condenser. The other end of the electronic expansion valve is connected to a plate heat exchanger, and the outlet end of the plate heat exchanger is connected to the outlet side of the unit via a pipe. The plate heat exchanger consists of multiple heat exchange plates, with a driving component fixedly connected to each plate. A scraper is positioned between adjacent heat exchange plates. The driving component drives the scraper to reciprocate within the plate heat exchanger, thus disrupting the water flow through the plate heat exchanger and simultaneously driving the water flow towards the heat exchange plates at the rear of the plate heat exchanger. This solves the problems of uneven water distribution, lack of impact protection, and insufficient functional coordination.

Description

Technical Field

[0001] This utility model relates to the field of liquid cooling unit technology, specifically a liquid cooling unit containing an integrated module of electronic expansion valve and plate heat exchanger. Background Technology

[0002] Liquid chillers with integrated modules of electronic expansion valves and plate heat exchangers are key temperature control devices in data centers, industrial refrigeration, precision machining, and other fields. Their core working principle involves a compressor driving refrigerant circulation. After the refrigerant flow is precisely regulated by the electronic expansion valve, it exchanges heat efficiently with cooling water in the plate heat exchanger, achieving temperature control of the target object. The plate heat exchanger, with its large heat exchange area, small size, and high heat exchange efficiency, becomes the core heat exchange component of the integrated module. The uniformity, cleanliness, and driving stability of the cooling water flow between the heat exchange plates directly determine the heat exchange efficiency of the plate heat exchanger, thus affecting the temperature control accuracy and operating energy consumption of the entire liquid chiller.

[0003] While existing liquid-cooled units with integrated modules containing electronic expansion valves and plate heat exchangers can achieve basic heat exchange functions, they have significant defects in water flow distribution, power drive, decontamination effect, and impact protection. This results in rapid decline in heat exchange efficiency, short equipment life, and difficulty in meeting the requirements for long-term and efficient operation. Firstly, the water flow distribution is uneven and prone to clogging. The cooling water flow of traditional plate heat exchangers mostly relies on the inlet water pressure to flow naturally through the gaps between the heat exchange plates. There is a lack of active directional flow guidance and transportation structure. The water flow tends to accumulate between the front heat exchange plates, while the rear heat exchange plates suffer from uneven heat exchange due to insufficient water volume.

[0004] Secondly, there is a lack of protection against shocks during startup and operation. The water flow at the moment of unit startup will generate a strong instantaneous impact on the internal drive components. The existing equipment does not have an effective buffer mechanism. Drive components (such as impellers and connecting rods) are prone to failures such as blade deformation and connecting rod breakage due to sudden changes in force, which significantly shortens the service life of the equipment. At the same time, when the water flow pressure fluctuates during operation, there is a lack of adaptive adjustment mechanism, and the water flow channel cannot be optimized through component displacement, resulting in unstable water flow efficiency and further affecting the stability of heat exchange performance.

[0005] Third, the coordination between cleaning and water flow disturbance is insufficient. Existing technologies do not organically combine cleaning action with water flow disturbance. The scraping process can only achieve a single cleaning function and cannot enhance the water flow turbulence effect through the movement of driving components. Furthermore, the simple water flow disturbance structure lacks linkage design with the cleaning components, which makes it easy for dirt to remain on the surface of the heat exchange plate. It cannot give full play to the role of turbulence in improving heat exchange uniformity, resulting in a functional separation between "cleaning and heat exchange".

[0006] To address the core pain points of the existing technologies, such as uneven water flow distribution, lack of impact protection, and insufficient functional coordination, there is an urgent need for a liquid-cooled unit structure that integrates active flow guidance and buffer protection functions. By optimizing the transmission coordination design of the drive components, it is possible to achieve integrated operation of directional water delivery, turbulence enhancement, and online decontamination. Combined with a buffer mechanism, it can improve the equipment's impact resistance, ensure long-term and efficient heat exchange of the plate heat exchanger, and meet the high reliability and low energy consumption requirements of liquid-cooled units. Utility Model Content

[0007] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a liquid-cooled unit with an integrated module of electronic expansion valve and plate heat exchanger, which has the advantages of integrated operation of directional water delivery, turbulence enhancement and online decontamination, and solves the problems of uneven water distribution, lack of impact protection and insufficient functional coordination.

[0008] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: A liquid-cooled unit with an integrated module of electronic expansion valve and plate heat exchanger includes a compressor. The output end of the compressor is connected to one end of the electronic expansion valve through a pipe and a condenser. The other end of the electronic expansion valve is connected to a plate heat exchanger. The outlet end of the plate heat exchanger is connected to the outlet side of the unit through a pipe. The plate heat exchanger consists of multiple heat exchange plates. A driving component is fixedly connected to each heat exchange plate, and a scraper is provided between two adjacent heat exchange plates. The driving component is used to drive the scraper to reciprocate inside the plate heat exchanger. The driving component is used to disturb the water flow through the plate heat exchanger and drive the water flow to move between the heat exchange plates at the rear of the plate heat exchanger.

[0009] Ideally, the drive component includes an impeller, a turbine, and a helical gear. The rear part of the impeller is fixedly connected to the helical gear via a connecting rod, and the rear part of the helical gear is fixedly connected to the turbine. The impeller generates driving force when water flows, and the turbine gathers water around the connecting rod and transports it backward.

[0010] Optimally, the drive unit further includes a reciprocating screw, which is installed between two adjacent heat exchange plates and is meshed with a helical gear.

[0011] Ideally, the scraping component includes a scraper and a lifting ring, the lifting ring being fixed inside the scraper and meshing with a helical gear.

[0012] Ideally, a fixed seat is fixedly connected inside the heat exchange plate, the connecting rod passes through the fixed seat, and a buffer is sleeved on the outside of the connecting rod. The buffer is located between the fixed seat and the helical gear, and the buffer plays a buffering role for the impeller when the water flow is large.

[0013] Ideally, the buffer consists of a buffer sleeve, a spring, and a buffer block, with the buffer block fitted inside the buffer sleeve and the spring disposed between the buffer block and the buffer sleeve.

[0014] Ideally, the scraper has a storage compartment inside for storing stains. The storage compartment has inclined plates at both ends for guiding the scraped stains into the storage compartment and preventing the stains from falling out of the storage compartment. The temporary storage chamber is fixedly connected to a connecting plate, and both the connecting plate and the inclined plate are provided with filter holes, which are only for water to flow through.

[0015] Ideally, the scraper is made of polytetrafluoroethylene.

[0016] (III) Beneficial Effects Compared with the prior art, this utility model provides a liquid-cooled unit with an integrated module of electronic expansion valve and plate heat exchanger, which has the following advantages: 1. This liquid-cooled unit, which includes an integrated module of electronic expansion valve and plate heat exchanger, uses a drive mechanism to rotate the impeller during operation. The impeller drives the helical gear and turbine to rotate synchronously via a connecting rod. When the turbine rotates, it generates axial suction, which gathers the water flow around the connecting rod and directs it to the rear heat exchange plate. This prevents the water flow from accumulating and clogging between the front heat exchange plates, thus affecting the heat exchange efficiency. At the same time, the water flow forms turbulence under the action of the impeller and turbine, improving the uniformity of heat exchange.

[0017] 2. This liquid-cooled unit, which includes an integrated module of electronic expansion valve and plate heat exchanger, absorbs the instantaneous impact force of water flow on the impeller when the unit starts up through the setting of buffer components. This prevents the impeller from deforming the blades or breaking the connecting rods due to sudden changes in force, thus extending the service life of the drive components. At the same time, after the impeller is impacted by the water flow, it moves backward, increasing the gap of water flow through the inlet and improving the efficiency of water flow through the inlet. This further enhances the adaptive adjustment capability of the water flow and ensures the operational stability of the transmission system. Attached Figure Description

[0018] Figure 1 This is a partial structural schematic diagram of the present invention.

[0019] Figure 2 This is a schematic diagram of the plate heat exchanger structure of this utility model.

[0020] Figure 3This is a schematic diagram of the heat exchange plate structure of this utility model.

[0021] Figure 4 This is another structural schematic diagram of the heat exchange plate of this utility model.

[0022] Figure 5 This is a schematic diagram of the drive component structure of this utility model.

[0023] Figure 6 This is a cross-sectional view of the heat exchange plate of this utility model.

[0024] Figure 7 This is a cross-sectional structural diagram of the scraper of this utility model.

[0025] Figure 8 This is a schematic diagram of the buffer structure of this utility model.

[0026] Figure 9 This is a cross-sectional structural diagram of the buffer component of this utility model.

[0027] In the diagram: 11. Compressor; 12. Electronic expansion valve; 13. Plate heat exchanger; 14. Heat exchange plate; 15. Drive component; 16. Scraper; 17. Impeller; 18. Turbine; 19. Helical gear; 20. Reciprocating screw; 21. Scraper; 22. Lifting ring; 23. Buffer component; 24. Buffer sleeve; 25. Spring; 26. Buffer block; 27. Temporary storage bin; 28. Inclined plate; 29. ​​Connecting plate. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] In addition, a fixed connection refers to a connection in which parts or components are fixed and there is no relative movement; a transmission connection refers to a connection in which mechanical motion or torque is transmitted to other working parts through a transmission component; a sliding connection refers to a connection in which two objects are in contact but not fixed and can slide relative to each other; and a rotational connection refers to a connection in which two objects are in contact but not fixed and can rotate relative to each other.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0032] Example 1: This embodiment provides a liquid-cooled unit with an integrated module of electronic expansion valve and plate heat exchanger, which has the following technical features.

[0033] Please see Figure 1-9 A liquid-cooled unit with an integrated module of electronic expansion valve and plate heat exchanger includes a compressor 11. The output end of the compressor 11 is connected to one end of the electronic expansion valve 12 through a pipe via a condenser. The other end of the electronic expansion valve 12 is connected to a plate heat exchanger 13. The outlet end of the plate heat exchanger 13 is connected to the outlet side of the unit through a pipe. The plate heat exchanger 13 is composed of multiple heat exchange plates 14. The spacing between two adjacent sets of plate heat exchangers 13 is 18mm. A driving component 15 is fixedly connected to the heat exchange plate 14. A scraper 16 is provided between two adjacent heat exchange plates 14. The driving component 15 is used to drive the scraper 16 to reciprocate inside the plate heat exchanger 13. The driving component 15 is used to disturb the water flow through the plate heat exchanger 13 and drive the water flow to move between the heat exchange plates 14 at the rear of the plate heat exchanger 13.

[0034] It should be noted that the plate heat exchanger 13, as the core heat exchange unit of the liquid-cooled unit, directly affects the heat exchange efficiency due to the cleanliness of the surface of its heat exchange plates 14. During long-term operation, impurities and scale in the water flow easily adhere to the surface of the heat exchange plates 14, forming a fouling layer that increases thermal resistance and hinders water flow. The drive component 15 has both power output and water flow disturbance functions. On the one hand, it provides the driving force for the reciprocating motion of the scraper 16 to achieve real-time fouling removal; on the other hand, it breaks the laminar flow state by disturbing the water flow, improving the heat exchange uniformity between the water flow and the heat exchange plates 14, while simultaneously pushing the water flow towards the rear heat exchange area to ensure that multiple sets of heat exchange plates 14 fully participate in heat exchange and guarantee the overall stable cooling performance of the unit.

[0035] In an optional embodiment, the drive unit 15 includes an impeller 17, a turbine 18, and a helical gear 19. The rear part of the impeller 17 is fixedly connected to the helical gear 19 via a connecting rod, and the rear part of the helical gear 19 is fixedly connected to the turbine 18. The impeller 17 is used to generate driving force when water flows and impacts, and the turbine 18 is used to gather water around the connecting rod and transport it backward.

[0036] It should be noted that the impeller 17 adopts a centrifugal blade structure with an arc-shaped blade design. When cooling water flows in from the inlet of the plate heat exchanger 13, the water flow impacts the blades, generating a rotational torque. This allows for self-sufficiency in power without an additional power source, resulting in energy conservation and environmental protection. The helical gear 19 is made of high-strength alloy steel, and its tooth surface has undergone hardening treatment, ensuring high meshing precision and minimal wear with subsequent transmission components. The helical blades of the turbine 18 are arranged coaxially with the connecting rod. During rotation, they generate axial suction, concentrating the water flow around the connecting rod to form a stable water jet. This avoids water flow impact and corrosion on the transmission components and also directionally propels the water flow towards the rear heat exchange plate 14, optimizing water flow distribution efficiency.

[0037] In an optional embodiment, the drive unit 15 further includes a reciprocating screw 20, which is mounted between two adjacent heat exchange plates 14 and is meshed with a helical gear 19.

[0038] It should be noted that the reciprocating screw 20 adopts a double-line symmetrical helical groove structure with a helix angle of 18°-22° and a groove depth to groove width ratio of 1:1.2. This structure can achieve the reciprocating linear motion of the lifting ring 22 through rotation in one direction, eliminating the need for an additional reversing mechanism and simplifying the complexity of the transmission system. The meshing transmission ratio between the helical gear 19 and the reciprocating screw 20 is set to 1:5, which can convert the high-speed rotation of the impeller 17 into the smooth rotation of the reciprocating screw 20, thereby enabling the lifting ring 22 to obtain a uniform reciprocating motion speed (3-5mm / s). This ensures that the scraper 16 thoroughly cleans the surface of the heat exchange plate 14 while avoiding impact wear caused by excessively fast movement. In addition, the surface of the reciprocating screw 20 is coated with a polytetrafluoroethylene wear-resistant coating with a thickness of 0.05-0.1mm, which can reduce the coefficient of friction with the lifting ring 22 and extend the service life of the reciprocating screw.

[0039] In an optional embodiment, the scraping member 16 includes a scraper 21 and a lifting ring 22, the lifting ring 22 being fixed inside the scraper 21 and meshing with a helical gear 19.

[0040] It should be noted that the inner ring of the lifting ring 23 is machined with an internal thread that matches the reciprocating screw 20. The thread engagement enables the transmission connection with the reciprocating screw 20. When the reciprocating screw 20 rotates, the lifting ring 22 performs a linear reciprocating motion along the axial direction of the reciprocating screw 20, thereby driving the scraper 21 to move synchronously. This coordinated design achieves a precise conversion from rotary motion to linear motion, ensuring that the scraper 21 can fully cover the surface of the heat exchange plate 14, improving the scraping coverage and cleaning effect.

[0041] In an optional embodiment, a fixed seat is fixedly connected inside the heat exchange plate 14, a connecting rod passes through the fixed seat, and a buffer 23 is sleeved on the outside of the connecting rod. The buffer 23 is located between the fixed seat and the helical gear 19, and the buffer 23 plays a buffering role on the impeller 17 when the water flow is large.

[0042] It should be noted that the mounting base is made of cast aluminum and is fixed to the heat exchange plate 14 with bolts. Its center hole is clearance-fitted with the connecting rod, ensuring the flexible rotation of the connecting rod. The buffer component 23 serves as a protective structure for the impeller 17. When the unit starts up, stops, or experiences sudden fluctuations in water flow, it can absorb the instantaneous impact force of the water flow on the impeller 17, preventing blade deformation or connecting rod breakage due to sudden force changes, thus extending the service life of the drive component 15. At the same time, after the water flow impacts the impeller 17, it causes the impeller 17 to move backward, increasing the gap at the water inlet and improving the water flow's adaptive adjustment capability, while also ensuring the operational stability of the transmission system.

[0043] In an optional embodiment, the buffer 23 consists of a buffer sleeve 24, a spring 25, and a buffer block 26, with the buffer block 26 fitted inside the buffer sleeve 24 and the spring 25 disposed between the buffer block 26 and the buffer sleeve 24.

[0044] It should be noted that the buffer sleeve 24 is made of wear-resistant rubber with a smooth inner wall, and slides in conjunction with the buffer block 26 to reduce relative friction loss. The spring 25 is a stainless steel compression spring with good fatigue resistance and reset capability. When the instantaneous impact force of the water flow is large, when the impact force acts on the impeller 17, the impeller 17 pushes the buffer block 26 to compress the spring 25 through the connecting rod, and the elastic deformation of the spring 25 absorbs the impact energy; when the impact force weakens, the spring 25 resets and pushes the buffer block 26 and the impeller 17 back to their initial positions, realizing dynamic buffer adjustment and effectively meeting the impact protection needs under different water flow conditions.

[0045] In an optional embodiment, a temporary storage chamber 27 is provided inside the scraper 21 for storing stains. The temporary storage chamber 27 is provided at both ends of the temporary storage chamber 27. The inclined plates 28 are provided at both ends of the temporary storage chamber 27 for guiding the scraped stains into the temporary storage chamber 27 and preventing the stains from falling out of the interior of the temporary storage chamber 27. The temporary storage chamber 27 is internally fixedly connected to a connecting plate 29. Both the connecting plate 29 and the inclined plate 28 are provided with filter holes, which are only for water to pass through.

[0046] It should be noted that the inclined plate 28 and the scraper 21 are inclined at an angle of 30°-45°. When scraping, the dirt slides into the temporary storage chamber 27 under the thrust of the water flow and the guidance of the inclined plate 28. When moving in the opposite direction, the inclined plate 28 forms a blocking surface to prevent the dirt from flowing back. The filter holes have a diameter of 0.2-0.5mm and are evenly distributed, which can ensure the smooth passage of cooling water and effectively trap dirt particles, preventing the dirt from re-adhering to the surface of the heat exchange plate 14 with the water flow.

[0047] In an optional embodiment, the scraper 21 is made of polytetrafluoroethylene.

[0048] It should be noted that polytetrafluoroethylene (PTFE) material possesses excellent corrosion resistance, wear resistance, and a low coefficient of friction, ranging from only 0.04 to 0.1. This results in minimal friction when in contact with the heat exchange plate 14, reducing movement resistance and component wear. Furthermore, this material has a wide high-temperature resistance range (-200℃ to 260℃), enabling it to adapt to water temperature changes during liquid cooling unit operation. It also does not chemically react with cooling water or refrigerant, exhibiting strong chemical stability. In addition, the smooth surface of PTFE material does not easily attract stains, reducing stain residue on the scraper 21 and ensuring long-term stable scraping performance.

[0049] Working principle: When the liquid-cooled unit is running, the compressor 11 delivers high-temperature and high-pressure refrigerant to the electronic expansion valve 12. After the refrigerant is throttled and depressurized, it enters the plate heat exchanger 13 and exchanges heat with the cooling water flowing through the heat exchange plates 14. The cooled refrigerant flows back to the compressor 11 to complete the cycle and realize the cooling function.

[0050] When cooling water flows into the plate heat exchanger 13, it impacts the impeller 17, causing it to rotate. The impeller 17 drives the helical gear 19 and the turbine 18 to rotate synchronously via the connecting rod. The rotation of the turbine 18 generates axial suction, which gathers the water flow around the connecting rod and directs it to the rear heat exchange plate 14. At the same time, the water flow forms turbulence under the action of the drive component 15, improving the heat exchange uniformity. The helical gear 19 meshes with the reciprocating screw 20, driving the lifting ring 22 to reciprocate along the axial direction of the reciprocating screw 20, which in turn drives the scraper 21 to slide back and forth on the surface of the heat exchange plate 14, scraping away the attached dirt.

[0051] The scraped dirt enters the temporary storage chamber 27 under the guidance of the inclined plate 28. The filter holes allow cooling water to pass through while trapping dirt, preventing backflow. When the water flow fluctuates significantly, the buffer 23 absorbs the impact energy through the elastic deformation of the spring 25, protecting the impeller 17 and connecting rod from damage. Simultaneously, the impeller 17 moves backward after being impacted by the water flow, increasing the water flow at the inlet. The ability to adaptively adjust the water flow is achieved through the adjustment of the solenoid valve. The scraper 21 is made of polytetrafluoroethylene (PTFE), ensuring effective scraping while minimizing wear on the heat exchange plate 14, achieving coordinated operation of efficient heat exchange and automatic dirt removal, and extending the maintenance cycle and service life of the plate heat exchanger 13.

[0052] In summary, this liquid-cooled unit with an integrated module of electronic expansion valve and plate heat exchanger, through the setting of the drive component 15, impacts the impeller 17 to make it rotate during use. The impeller 17 drives the helical gear 19 and the turbine 18 to rotate synchronously through the connecting rod. When the turbine 18 rotates, it generates axial suction, which gathers the water flow around the connecting rod and directs it to the rear heat exchange plate 14. This avoids the water flow from accumulating and clogging between the front heat exchange plates 14, thus affecting the heat exchange efficiency. At the same time, the water flow forms turbulence under the action of the impeller 17 and the turbine 18, which improves the heat exchange uniformity.

[0053] This liquid-cooled unit, which includes an integrated module of electronic expansion valve and plate heat exchanger, can absorb the instantaneous impact force of water flow on impeller 17 when the unit starts up through the setting of buffer 23. This prevents impeller 17 from deforming blades or breaking connecting rods due to sudden force changes, thus extending the service life of drive component 15. At the same time, after being impacted by water flow, impeller 17 moves backward, increasing the gap of water flow through the inlet and improving the efficiency of water flow through the inlet. This further enhances the adaptive adjustment capability of water flow and ensures the operational stability of the transmission system.

[0054] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0055] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A liquid-cooled unit with an integrated module of electronic expansion valve and plate heat exchanger, comprising a compressor (11), wherein the output end of the compressor (11) is connected to one end of an electronic expansion valve (12) via a pipe through a condenser, and the other end of the electronic expansion valve (12) is connected to a plate heat exchanger (13), wherein the outlet end of the plate heat exchanger (13) is connected to the outlet side of the unit via a pipe, characterized in that: The plate heat exchanger (13) is composed of multiple heat exchange plates (14). A drive member (15) is fixedly connected to the heat exchange plate (14). A scraper (16) is provided between two adjacent heat exchange plates (14). The drive member (15) is used to drive the scraper (16) to reciprocate inside the plate heat exchanger (13). The drive member (15) is used to disturb the water flow through the plate heat exchanger (13) and drive the water flow to move between the heat exchange plates (14) at the rear of the plate heat exchanger (13).

2. The liquid-cooled unit with an integrated module of electronic expansion valve and plate heat exchanger according to claim 1, characterized in that, The drive unit (15) includes an impeller (17), a turbine (18) and a helical gear (19). The rear part of the impeller (17) is fixedly connected to the helical gear (19) via a connecting rod. The rear part of the helical gear (19) is fixedly connected to the turbine (18). The impeller (17) is used to generate driving force when water flows. The turbine (18) is used to gather water around the connecting rod and transport it backward.

3. A liquid-cooled unit with an integrated module of electronic expansion valve and plate heat exchanger according to claim 2, characterized in that, The drive unit (15) also includes a reciprocating screw (20), which is installed between two adjacent heat exchange plates (14) and is meshed with a helical gear (19).

4. A liquid-cooled unit with an integrated module of electronic expansion valve and plate heat exchanger according to claim 1, characterized in that, The scraping component (16) includes a scraper (21) and a lifting ring (22), the lifting ring (22) being fixed inside the scraper (21), and the lifting ring (22) meshing with a helical gear (19).

5. A liquid-cooled unit with an integrated module of electronic expansion valve and plate heat exchanger according to claim 2, characterized in that, The heat exchange plate (14) is internally fixedly connected to a fixed seat. The connecting rod passes through the fixed seat and a buffer (23) is sleeved on the outside of the connecting rod. The buffer (23) is located between the fixed seat and the helical gear (19). The buffer (23) plays a buffering role on the impeller (17) when the water flow is large.

6. A liquid-cooled unit with an integrated module of electronic expansion valve and plate heat exchanger according to claim 5, characterized in that, The buffer (23) consists of a buffer sleeve (24), a spring (25) and a buffer block (26). The buffer block (26) is fitted inside the buffer sleeve (24), and the spring (25) is disposed between the buffer block (26) and the buffer sleeve (24).

7. A liquid-cooled unit with an integrated module of electronic expansion valve and plate heat exchanger according to claim 4, characterized in that, The scraper (21) has a storage compartment (27) inside, which is used to store stains. The two ends of the storage compartment (27) are provided with inclined plates (28), which are used to guide the scraped stains into the storage compartment (27) and prevent the stains from falling out of the storage compartment (27). The temporary storage chamber (27) is fixedly connected to a connecting plate (29). Both the connecting plate (29) and the inclined plate (28) are provided with filter holes, which are only for water to flow through.

8. A liquid-cooled unit with an integrated module of electronic expansion valve and plate heat exchanger according to claim 4, characterized in that, The scraper (21) is made of polytetrafluoroethylene.

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