Self-control water-air circulation heat exchange device for frequency converter

Abstract

This invention relates to the field of inverter cooling technology, and more particularly to a self-controlled water-air circulation heat exchange device for inverters, comprising a water tank, a water pump for conveying water, and a heat exchanger assembly, and further comprising: a water outlet, and a return water outlet is provided next to the water outlet; this invention utilizes the collaborative action of an electromagnetic starter, an automatic control system, and a sensing unit composed of a liquid level sensor, a pressure sensor, a temperature sensor, and a flow sensor in an intelligent control mechanism. The temperature sensor monitors the return water temperature change in real time. When the heat source power consumption is low, the automatic control system precisely reduces the speed of the water pump and the main motor, so that the heat dissipation capacity and heat generation are dynamically matched, avoiding ineffective energy consumption. When the heat source power consumption increases, the speed is automatically increased to enhance heat dissipation, ensuring that the temperature rise is always controllable. Compared with traditional constant speed systems, this significantly reduces operating energy consumption, while greatly improving the equipment's adaptability to different operating conditions and operational safety.

Description

Technical Field

[0001] This invention relates to the field of inverter cooling technology, specifically to a self-controlled water-air circulation heat exchange device for inverters. Background Technology

[0002] In recent years, due to increased power, frequency converters and their driven motors have widely adopted water cooling to replace traditional air-cooled radiators in order to reduce equipment temperature and improve reliability. However, conventional water cooling systems suffer from increasingly serious problems such as outdated technology, uncontrollable operation, and unreliable quality, and can no longer meet user needs.

[0003] Water cooling, with its significantly higher heat exchange efficiency than air cooling, has become the mainstream solution for ensuring stable equipment operation. However, the currently widely used conventional water cooling systems are revealing many shortcomings. Their technical architecture is relatively outdated, often employing fixed-speed pumps and valves with simple start-stop controls, which cannot dynamically adjust according to the real-time heat load of the equipment, resulting in both wasted power consumption and insufficient heat dissipation. Summary of the Invention

[0004] The purpose of this invention is to provide a self-controlled water-air circulation heat exchange device for frequency converters, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a self-controlled water-air circulation heat exchange device for a frequency converter, comprising a water tank, a water pump for conveying water, and a heat exchanger assembly, and further comprising: The water outlet is provided with a return water outlet on one side. The water outlet and the return water outlet are respectively used to connect to the inlet and outlet of the frequency converter or the variable frequency motor. The filter is connected to the return water inlet and to the heat exchanger assembly via a pipeline. The heat exchanger assembly is connected to the water tank via a pipeline, and the water tank is connected to the water pump via a pipeline. The intelligent control mechanism consists of an electromagnetic starter, an automatic control system, and a sensing unit. A casing is connected to the back of the heat exchanger assembly, and a fan blade and a main shaft are provided inside the casing, with the fan blade and the main shaft fixed to each other. The main motor, whose output shaft is fixed to the fan blades, is used to drive the fan blades and the main shaft to rotate. A wind-powered self-cleaning component is connected to the housing and uses fan blades for exhaust.

[0006] Preferably, the sensing unit consists of a liquid level sensor, a pressure sensor, a temperature sensor, and a flow sensor.

[0007] Preferably, the liquid level sensor is installed on the pipeline between the water pump and the outlet, the temperature sensor is installed on the pipeline between the return outlet and the filter, the liquid level sensor is installed on the top of the water tank with its probe end located inside the water tank, and the flow sensor is installed on the pipeline between the filter and the heat exchanger assembly.

[0008] Preferably, the heat exchanger assembly is a manifold heat exchanger with multiple sets of copper tubes connected in parallel or series and externally expanded aluminum fins.

[0009] Preferably, the wind-powered self-cleaning component includes: The wind power unit uses the exhaust air from the fan blades as its power source; The capture element is installed at the air outlet of the wind turbine unit; The tapping assembly is used to tap the back of the heat exchanger assembly.

[0010] Preferably, the wind turbine unit includes: A connecting cylinder with a threaded inner wall at its outlet end for use with a capturing element; there are two sets of the connecting cylinders, which are interconnected with the cover. The fixed blade is fixed inside the connecting cylinder, and the fixed blade is designed to be inclined. The drive shaft is rotatably connected to the connecting cylinder; The moving blade is fixed to the surface of the drive shaft, and the moving blade is designed to be inclined. The connecting rod is welded to the drive shaft near its end. The scraper is bolted to the connecting rod and contacts the inner wall of the capture element.

[0011] Preferably, the capturing element is a metal mesh cylinder with external threads.

[0012] Preferably, the tilt direction of the moving blade surface is opposite to the tilt direction of the fixed blade surface.

[0013] Preferably, the striking assembly includes a connecting cover and a crankshaft. The connecting cover penetrates the housing, and the crankshaft is rotatably connected to the inner wall of the connecting cover. The end of the drive shaft away from the connecting rod is connected to the crankshaft via gear transmission. A sleeve is provided through the side of the connecting cover near the heat exchanger assembly. A movable rod is slidably connected to the inner wall of the sleeve. A push-pull rod is hinged to one end of the movable rod, and the other end of the push-pull rod is rotatably connected to the crankshaft. An impact plate is bolted to the other end of the movable rod.

[0014] Preferably, a rubber pad is adhered to the surface of the impact plate.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention utilizes the electromagnetic starter, automatic control system, and sensing unit composed of liquid level sensor, pressure sensor, temperature sensor, and flow sensor in an intelligent control mechanism to work together. The temperature sensor monitors the return water temperature change in real time. When the heat source power consumption is low, the automatic control system precisely reduces the speed of the water pump and main motor, so that the heat dissipation capacity and heat generation are dynamically matched, avoiding ineffective energy consumption. When the heat source power consumption increases, the speed is automatically increased to enhance heat dissipation, ensuring that the temperature rise is always controllable. Compared with the traditional constant speed system, it significantly reduces the operating energy consumption, while greatly improving the equipment's adaptability to different working conditions and operational safety.

[0016] 2. This invention utilizes the exhaust air from the fan blades as power to create a wind-powered self-cleaning component. The fixed and moving blades in the wind unit, with their opposite tilt directions, efficiently convert wind energy into mechanical energy, driving the crankshaft and push-pull rod in the impact assembly to reciprocate. This causes the impact plate to continuously and gently strike the back of the heat exchanger assembly through the rubber pad. The resulting vibration causes fine dust particles on the fin surface to detach and be carried by the airflow through the cover and connecting cylinder into the collection component for centralized collection, thus avoiding the decrease in heat exchange performance caused by dust accumulation.

[0017] 3. This invention uses a scraper that rotates synchronously with the drive shaft to continuously clean the mesh on the inner wall of the capture component, ensuring smooth ventilation. Simultaneously, the exhaust direction is altered by the connecting cylinder, eliminating direct hot air impact on the main motor and effectively reducing the operating temperature of the main motor. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure in this invention; Figure 2 This is a schematic diagram of the structure of the casing and its surface in this invention; Figure 3 This is a structural schematic diagram from the other side of the casing in this invention; Figure 4 This is a schematic cross-sectional view of the casing and connecting cylinder in this invention; Figure 5 This is a schematic diagram of the striking component in this invention; Figure 6 This is a schematic cross-sectional view of the connecting cylinder in this invention; Figure 7 This is a schematic diagram of the structure of the movable rod and the impact plate in this invention: Figure 8 This is a schematic diagram of the structure of the capturing element in this invention.

[0019] In the diagram: 1. Water tank; 2. Water pump; 3. Outlet; 4. Return outlet; 5. Filter; 6. Heat exchanger assembly; 7. Liquid level sensor; 8. Pressure sensor; 9. Temperature sensor; 10. Flow sensor; 11. Automatic control system; 12. Electromagnetic starter; 13. Cover; 14. Main motor; 15. Wind-powered self-cleaning component; 151. Wind unit; 1511. Connecting cylinder; 1512. Moving blade; 1513. Fixed blade; 1514. Drive shaft; 1515. Connecting rod; 1516. Scraper; 152. Capturing component; 153. Impact assembly; 1531. Connecting cover; 1532. Crankshaft; 1533. Push-pull rod; 1534. Sleeve; 1535. Movable rod; 1536. Impact plate; 1537. Rubber pad; 16. Main shaft; 17. Fan blade. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figures 1-8 A self-controlled water-air circulation heat exchange device for a frequency converter includes a water tank 1, a water pump 2 for conveying water, and a heat exchanger assembly 6. The device also includes a water outlet 3, a filter 5, an intelligent control mechanism, a housing 13, a main motor 14, and a wind-driven self-cleaning component 15. A return water outlet 4 is provided next to the water outlet 3. The water outlet 3 and the return water outlet 4 are respectively used to connect to the inlet and outlet of the frequency converter or the frequency converter motor. The filter 5 is interconnected with the return water outlet 4 and interconnected with the heat exchanger assembly 6 through a pipeline. The heat exchanger assembly 6 is interconnected with the water tank 1 through a pipeline. The water tank 1 is connected to the water pump 2 through a pipeline. The pipelines are interconnected. The intelligent control mechanism consists of an electromagnetic starter 12, an automatic control system 11, and a sensing unit. The cover 13 is connected to the back of the heat exchanger assembly 6, and the inside of the cover 13 is equipped with a fan blade 17 and a main shaft. The fan blade 17 and the main shaft 16 are fixed to each other. The output shaft of the main motor 14 is fixed to the fan blade 17 and is used to drive the fan blade 17 and the main shaft 16 to rotate. The wind-driven self-cleaning component 15 is connected to the cover 13 and uses the exhaust air of the fan blade 17 as power. The heat exchanger assembly 6 adopts a manifold heat exchanger with multiple sets of copper tubes connected in parallel and series and externally expanded aluminum fin groups.

[0022] Specifically, the sensing unit consists of a level sensor 7, a pressure sensor 8, a temperature sensor 9, and a flow sensor 10. The level sensor 7 is installed on the pipeline between the water pump 2 and the outlet 3. The temperature sensor 9 is installed on the pipeline between the return outlet 4 and the filter 5. The level sensor 7 is installed on the top of the water tank 1, and its probe end is located inside the water tank 1. The flow sensor 10 is installed on the pipeline between the filter 5 and the heat exchanger assembly 6.

[0023] The outlet 3 and return 4 of this device are connected to a heat source, typically the inlet and outlet of a frequency converter or variable frequency motor, respectively, to inject coolant into the water tank 1. During normal operation, the coolant, pressurized by the water pump 2, flows through the heat source for heat exchange, increasing its temperature. It then passes through the return 4, and after passing through the filter 5 to remove impurities, it enters the heat exchanger assembly 6. The main motor 14 is turned on, driving the fan blades 17 to rotate. Air is drawn in through the front of the heat exchanger assembly 6 (the front of the heat exchanger assembly 6 has a filter with large mesh openings to trap large dust particles), where it contacts the internal fins for heat exchange, lowering the coolant temperature before returning to the water tank 1, completing the circulation. A level sensor 7 is installed in the water tank 1, a pressure sensor 8 is installed in the outlet pipe, a temperature sensor 9 is installed in the return pipe, and a flow sensor 10 is installed. These sensors are connected to the automatic control system 11, which monitors the coolant in real time. The automatic control system 11 collects signals and, after optimization, issues commands to control the speed of the water pump 2 and the heat exchange fan. When the heat source power consumption is low, the temperature of the coolant flowing out of the heat source is low, and the data from the temperature sensor 9 is relatively low. At this time, the automatic control system 11 executes an internal optimization program to reduce the speed of the water pump 2 and the main motor 14 (i.e., the fan blades 17) to automatically match the current heat generation and reduce the system's operating energy consumption. When the heat source power consumption is high, the temperature of the coolant flowing out of the heat source is high, and the data from the temperature sensor 9 will approach or even exceed the set value for a short period of time. At this time, the automatic control system 11 will increase the speed of the water pump 2 and the fan to adapt to the current heat generation. If the temperature exceeds the set temperature for 5 seconds (which can be set), an over-temperature alarm will be triggered, and the over-temperature signal will be transmitted to the heat source equipment. The heat source equipment can appropriately reduce its output power according to the signal strength to reach a new balance point and ensure the safe operation of the equipment.

[0024] Due to prolonged use, the heat exchanger assembly 6 will accumulate fine dust that cannot be blocked by the dust filter, affecting the heat exchange effect. In addition, the exhaust air from the fan blade 17 is directly directed at the subsequent main motor 14, which can easily cause the temperature of the main motor 14 to rise. Therefore, a wind-powered self-cleaning component 15 is provided. The wind-powered self-cleaning component 15 includes a wind unit 151, a capture component 152, and a tapping component 153. The wind unit 151 uses the exhaust air from the fan blade 17 as its power source. The capture component 152 is located at the air outlet of the wind unit 151. The tapping component 153 is used to tap the back of the heat exchanger assembly 6.

[0025] Specifically, the wind turbine unit 151 includes a connecting cylinder 1511, a fixed blade 1513, a drive shaft 1514, a moving blade 1512, a connecting rod 1515, and a scraper 1516. The outlet end of the connecting cylinder 1511 has a threaded inner wall that mates with the capture element 152. There are two sets of connecting cylinders 1511, which are interconnected with the housing 13. The fixed blade 1513 is fixed inside the connecting cylinder 1511 and is designed to be inclined. The drive shaft 1514 is rotatably connected to the connecting cylinder 1511, and the moving blade 1516... 512 is fixed to the surface of the drive shaft 1514, and the moving blade 1512 is designed with an inclination. The connecting rod 1515 is welded to the drive shaft 1514 near the end. The scraper 1516 is bolted to the connecting rod 1515 and contacts the inner wall of the capture element 152. The capture element 152 is a metal mesh cylinder with external threads. The inclination direction of the surface of the moving blade 1512 is opposite to the inclination direction of the surface of the fixed blade 1513. The moving blade 1512 and the fixed blade 1513 with opposite inclination angles can improve the wind power utilization rate.

[0026] The striking assembly 153 includes a connecting cover 1531 and a crankshaft 1532. The connecting cover 1531 penetrates the housing 13. The crankshaft 1532 is rotatably connected to the inner wall of the connecting cover 1531. The end of the drive shaft 1514 away from the connecting rod 1515 is connected to the crankshaft 1532 via gear transmission. A sleeve 1534 is provided through the connecting cover 1531 on the side near the heat exchanger assembly 6. A movable rod 1535 is slidably connected to the inner wall of the sleeve 1534. A push-pull rod 1533 is hinged to one end of the movable rod 1535. The other end of the push-pull rod 1533 is rotatably connected to the crankshaft 1532. An impact plate 1536 is bolted to the other end of the movable rod 1535. A rubber pad 1537 is adhered to the surface of the impact plate 1536.

[0027] During the operation of the heat exchanger assembly 6, the rotation of the fan blades 17 causes air to enter from the front of the heat exchanger assembly 6 (the side away from the casing 13). The air is discharged through the fan blades 17 and enters the interior of the connecting cylinder 1511, driving the moving blades 1512 to rotate, thereby generating power. The moving blades 1512 drive the drive shaft 1514 to rotate, which, under the action of the bevel gear, drives the crankshaft 1532 to rotate. The crankshaft 1532 drives one end of the push-pull rod 1533 to perform a circular motion, and pushes the movable rod 1535 to move repeatedly along the inner wall of the sleeve 1534, thereby driving the impact plate 1536 to move repeatedly. The back of the heat exchanger assembly 6 is repeatedly tapped with rubber pad 1537 to generate vibrations that are transmitted to the interior of the heat exchanger assembly 6. The flowing air causes fine dust on the surface of the internal fins to fall off and follow the airflow through the cover 13 and connecting cylinder 1511 into the interior of the capture element 152. The fine dust is captured, and the exhaust air is discharged from the connecting cylinder 1511, changing direction so that it does not blow directly onto the main motor 14. The drive shaft 1514 drives the scraper 1516 to make a circular motion through the connecting rod 1515 to prevent fine dust from continuously covering the mesh of the inner wall of the capture element 152 and affecting the exhaust.

[0028] The dust accumulated inside the capture element 152 can be drained during maintenance by rotating the lower capture element 152 (which is connected to the connecting cylinder 1511 by threads).

[0029] 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.

[0030] 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 self-controlled water-air circulation heat exchange device for a frequency converter, comprising a water tank (1), a water pump (2) for conveying water, and a heat exchanger assembly (6), characterized in that, Also includes: The outlet (3) is provided with a return water port (4) on one side of the outlet (3). The outlet (3) and the return water port (4) are respectively used to connect to the inlet and outlet of the frequency converter or the variable frequency motor. The filter (5) is connected to the return water port (4) and to the heat exchanger assembly (6) through a pipeline. The heat exchanger assembly (6) is connected to the water tank (1) through a pipeline. The water tank (1) is connected to the water pump (2) through a pipeline. The intelligent control mechanism consists of an electromagnetic starter (12), an automatic control system (11), and a sensing unit; A cover (13) is connected to the back of the heat exchanger assembly (6), and a fan blade (17) and a main shaft are provided inside the cover (13), and the fan blade (17) and the main shaft (16) are fixed to each other. The main motor (14) has its output shaft fixed to the fan blade (17) and is used to drive the fan blade (17) and the main shaft (16) to rotate. The wind-powered self-cleaning component (15) is connected to the housing (13) and uses the fan blades (17) for exhaust.

2. The self-controlled water-air circulation heat exchanger for a frequency converter according to claim 1, characterized in that: The sensing unit consists of a level sensor (7), a pressure sensor (8), a temperature sensor (9), and a flow sensor (10).

3. The self-controlled water-air circulation heat exchanger for a frequency converter according to claim 2, characterized in that: The liquid level sensor (7) is installed on the pipeline between the water pump (2) and the outlet (3), the temperature sensor (9) is installed on the pipeline between the return outlet (4) and the filter (5), the liquid level sensor (7) is installed on the top of the water tank (1) and the probe end is located inside the water tank (1), and the flow sensor (10) is installed on the pipeline between the filter (5) and the heat exchanger assembly (6).

4. The self-controlled water-air circulation heat exchanger for a frequency converter according to claim 1, characterized in that: The heat exchanger assembly (6) is a manifold heat exchanger with multiple sets of copper tubes connected in parallel and in series and externally expanded aluminum fins.

5. The self-controlled water-air circulation heat exchanger for a frequency converter according to claim 1, characterized in that, The wind-powered self-cleaning component (15) includes: The wind power unit (151) uses the exhaust air from the fan blades (17) as its power source; The capture element (152) is installed at the air outlet of the wind unit (151); A tapping assembly (153) is used to tap the back of the heat exchanger assembly (6).

6. A self-controlled water-air circulation heat exchanger for a frequency converter according to claim 5, characterized in that, The wind turbine unit (151) includes: The connecting cylinder (1511) has a threaded inner wall at its outlet end for use with the capture element (152). There are two sets of the connecting cylinder (1511) and they are interconnected with the cover (13). The fixed blade (1513) is fixed inside the connecting cylinder (1511), and the fixed blade (1513) is designed to be inclined. The drive shaft (1514) is rotatably connected to the connecting cylinder (1511); The moving blade (1512) is fixed to the surface of the drive shaft (1514), and the moving blade (1512) is designed to be inclined. The connecting rod (1515) is welded to the drive shaft (1514) near the end; The scraper (1516) is bolted to the connecting rod (1515) and contacts the inner wall of the catcher (152).

7. A self-controlled water-air circulation heat exchanger for a frequency converter according to claim 5, characterized in that: The catcher (152) is a metal mesh tube with external threads.

8. A self-controlled water-air circulation heat exchanger for a frequency converter according to claim 6, characterized in that: The tilt direction of the surface of the moving blade (1512) is opposite to the tilt direction of the surface of the fixed blade (1513).

9. A self-controlled water-air circulation heat exchanger for a frequency converter according to claim 6, characterized in that: The striking assembly (153) includes a connecting cover (1531) and a crankshaft (1532). The connecting cover (1531) penetrates the housing (13). The crankshaft (1532) is rotatably connected to the inner wall of the connecting cover (1531). The end of the transmission shaft (1514) away from the connecting rod (1515) is connected to the crankshaft (1532) via gear transmission. A sleeve (1534) is provided through the side of the connecting cover (1531) near the heat exchanger assembly (6). A movable rod (1535) is slidably connected to the inner wall of the sleeve (1534). A push-pull rod (1533) is hinged to one end of the movable rod (1535). The other end of the push-pull rod (1533) is rotatably connected to the crankshaft (1532). An impact plate (1536) is bolted to the other end of the movable rod (1535).

10. A self-controlled water-air circulation heat exchanger for a frequency converter according to claim 9, characterized in that: A rubber pad (1537) is bonded to the surface of the impact plate (1536).

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