Device for cooling frequency converter by utilizing medium of water pump

Abstract

The invention relates to the technical field of frequency converter cooling, and particularly discloses a device for cooling a frequency converter by using a medium of a water pump, which comprises a circulating pump frequency converter, an air-water cooling device and a seawater cooler, an air inlet pipe of the circulating pump frequency converter is connected with an air duct of the air-water cooling device, and an air outlet pipe is connected with the seawater cooler; a circulating water pump is mounted at one end of the seawater cooler; low-temperature water at an outlet of the circulating water pump is directly used as a cooling medium through the closed circulating water system, the energy consumption of the air cooling system is reduced, the temperature in the frequency converter cabinet is reduced through cooperative heat exchange of the air-water cooling device and the seawater cooler, component damage caused by local overheating is avoided, a natural air cooling mode can be rapidly switched to when the closed system breaks down, and the energy consumption is reduced. The design of the access hole supports the rapid maintenance of the seawater cooler, the linkage control of the booster fan and the circulating water pump realizes the dynamic adaptation of the cooling demand and the water flow, and the operation stability of the system is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of frequency converter cooling, in particular to a device for cooling a frequency converter by utilizing the medium of a water pump itself. Background Art

[0002] With the increasing use of high-power inverters in power plants, the safety issues they raise are becoming increasingly concerning. Due to their high heat generation, high-power pump and fan inverters require a separate cooling system, such as air conditioning, to operate properly. This large cooling capacity also requires a correspondingly large amount of power, which is clearly undesirable in today's increasingly energy-conscious world. Research has found that, under certain conditions, it is possible to integrate the cooling system with the pump and fan's own cooling medium to achieve energy-saving effects, thereby ensuring safe operation of the unit.

[0003] Indoor air conditioners typically use a bottom-in, top-out cooling system. Since VFDs also use a bottom-in, top-out cooling system, they can compete with the fans in circulating pump VFDs to a certain extent. Within this range, the air drawn into the circulating pump VFDs is not fully cooled, which reduces their cooling effectiveness and increases the air conditioner's energy consumption. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to solve the technical problems of high energy consumption, insufficient cooling efficiency and high maintenance cost existing in the traditional circulating water pump inverter cooling system.

[0005] The above technical problem is solved by the following technical solution: The present invention proposes a device for cooling a frequency converter using the medium of a water pump itself, which includes a circulating pump frequency converter, an air-water cooling device and a seawater cooler;

[0006] The air inlet pipe of the circulating pump frequency converter is connected to the air duct of the air-water cooling device, and the air outlet pipe thereof is connected to the seawater cooler;

[0007] A circulating water pump is installed at one end of the seawater cooler;

[0008] Water enters the seawater cooler from the circulating water pump, the seawater cooler cools the air-water cooling device, and the air-water cooling device delivers cold air to the circulating pump inverter.

[0009] In a preferred embodiment of the device for cooling the frequency converter using the water pump's own medium according to the present invention, the air-water cooling device includes:

[0010] Frequency conversion cabinet and voltage conversion cabinet;

[0011] A first rapid air duct is fixedly connected above the frequency conversion cabinet, a first axial flow fan is installed at one end of the first rapid air duct, and an air outlet of the first axial flow fan is fixedly connected to the inner wall of the air-water cooling device.

[0012] In a preferred embodiment of the device for cooling a frequency converter by using the medium of a water pump itself according to the present invention: a first connecting valve is installed on the first rapid air duct.

[0013] In a preferred embodiment of the device for cooling the inverter using the water pump's own medium as described in the present invention: a second rapid air duct is fixedly connected above the transformer cabinet, a second axial flow fan is installed at one end of the second rapid air duct, and the air outlet of the second axial flow fan is fixedly connected to the inner wall of the air-water cooling device.

[0014] In a preferred embodiment of the device for cooling a frequency converter by using the medium of a water pump itself according to the present invention: a second connecting valve is installed on the second rapid air duct.

[0015] In a preferred embodiment of the device for cooling a frequency converter using the medium of a water pump itself according to the present invention, the air-water cooling device further comprises an outdoor pipe, wherein an emergency switching baffle is installed in the outdoor pipe.

[0016] In a preferred embodiment of the device for cooling the frequency converter using the water pump's own medium of the present invention: the emergency switching baffle includes a baffle having the same size as the inner diameter of the outdoor pipe, and a handle installed at one end of the baffle.

[0017] In a preferred embodiment of the device for cooling a frequency converter using the water pump's own medium of the present invention: a booster fan is installed in the air duct connecting the air-water cooling device and the circulating pump frequency converter.

[0018] In a preferred embodiment of the device for cooling a frequency converter by utilizing the medium of a water pump itself according to the present invention: one end of the circulating water pump is fixedly connected to a condenser.

[0019] In a preferred embodiment of the device for cooling a frequency converter using the water pump's own medium of the present invention, a manhole is installed on the seawater cooler.

[0020] The beneficial effects of the present invention are as follows: the low-temperature water at the outlet of the circulating water pump is directly used as the cooling medium through the closed circulating water system, thereby reducing the energy consumption of the air-cooling system; the air-water cooling device and the seawater cooler cooperate in heat exchange to reduce the temperature inside the inverter cabinet, avoiding damage to components caused by local overheating; and the device can quickly switch to the natural air cooling mode when the closed system fails to ensure the continuous operation of the inverter. The inspection hole design supports the rapid maintenance of the seawater cooler, and the booster fan and the circulating water pump are linked to achieve dynamic adaptation of cooling demand and water flow, thereby improving the stability of system operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings of the embodiments of the present invention. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention. Among them:

[0022] Figure 1 A diagram showing an air-water cooling device that utilizes the water pump's own medium to cool the frequency converter;

[0023] Figure 2 Shows the overall system diagram of the device that uses the water pump's own medium to cool the inverter;

[0024] Figure 3 The baffle structure diagram of the device that uses the water pump's own medium to cool the inverter is shown.

[0025] In the picture:

[0026] 1. Circulating pump inverter; 2. Air-water cooling device; 3. Seawater cooler; 4. Circulating water pump; 21. Frequency converter cabinet; 22. First rapid air duct; 23. First axial flow fan; 24. First connecting valve; 25. Second rapid air duct; 26. Second axial flow fan; 27. Outdoor pipeline; 28. Emergency switch damper; 281. Baffle; 282. Handle; 29. ​​Transformer cabinet; 5. Condenser. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below with reference to specific embodiments and the accompanying drawings.

[0028] The terms used in the present invention are those commonly used in the art in view of the functions of the present invention, but these terms may vary according to the intentions of those skilled in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the present invention. Therefore, the terms used in the specification should not be understood as simple names, but rather as the meanings of the terms and the overall description of the present invention.

[0029] Reference Figure 1 and Figure 2 This embodiment provides a device for cooling an inverter using the water pump's own medium, including a circulating pump inverter 1, an air-water cooling device 2, and a seawater cooler 3; the air inlet pipe of the circulating pump inverter 1 is connected to the air duct of the air-water cooling device 2, and its air outlet pipe is connected to the seawater cooler 3; a circulating water pump 4 is installed at one end of the seawater cooler 3.

[0030] Water enters the seawater cooler 3 from the circulating water pump 4 , the seawater cooler 3 cools the air-water cooling device 2 , and the air-water cooling device 2 delivers cold air to the circulating pump inverter 1 .

[0031] The circulating water pump 4 pressurizes the cooling water from the system water tank or the external water source and sends it to the seawater cooler 3, where the cooling water is initially cooled by the seawater.

[0032] The cooled cooling water enters the air-water cooling device 2 and transfers heat to the internal cooling air through the heat exchanger, further reducing the water temperature, forming a "water-cooling-air-cooling" cascade cooling.

[0033] The cooling water returns to the seawater cooler 3 after heat exchange, completing the cycle.

[0034] The air-water cooling device 2 has a built-in fan, which uses the low temperature of the cooling water to cool the internal air through the heat exchanger to generate low-temperature airflow.

[0035] The cooled air is piped to the air inlet of the circulating pump inverter 1, where it absorbs the heat generated by the inverter's operation. It is then discharged into the heat dissipation area of ​​the seawater cooler 3, where it is ultimately released through natural convection or forced exhaust. Even when the ambient temperature rises or the efficiency of the seawater cooler 3 decreases, the air-water cooling unit 2 can independently maintain the inverter's low operating temperature, preventing overheating and shutdown.

[0036] The inverter can adjust the speed of the circulating water pump 4 through PID control according to its own temperature or load requirements, dynamically matching the cooling requirements to avoid overcooling or insufficient heat dissipation.

[0037] The seawater cooler 3 and the air-water cooling device 2 work together to form a "natural cooling + mechanical cooling" dual mode to adapt to different ambient temperatures and load scenarios.

[0038] The air-water cooling device 2 includes a frequency converter cabinet 21 and a voltage converter cabinet 29. A first rapid air duct 22 is fixedly connected above the frequency converter cabinet 21. A first axial flow fan 23 is installed at one end of the first rapid air duct 22. The air outlet of the first axial flow fan 23 is fixedly connected to the inner wall of the air-water cooling device 2. A first connecting valve 24 is installed on the first rapid air duct 22.

[0039] A second rapid air duct 25 is fixedly connected above the transformer cabinet 29 , a second axial flow fan 26 is installed at one end of the second rapid air duct 25 , and an air outlet of the second axial flow fan 26 is fixedly connected to the inner wall of the air-water cooling device 2 .

[0040] A second connecting valve is installed on the second rapid air duct 25 .

[0041] The air-water cooling device 2 further includes an outdoor pipe 27, in which an emergency switching baffle 28 is installed. A booster fan is installed in the air duct connecting the air-water cooling device 2 and the circulating pump inverter 1.

[0042] The multi-stage air duct design, axial fan linkage control, and emergency switching of outdoor ducts 27 achieve efficient heat dissipation and fault tolerance for the frequency converter cabinet 21 and transformer cabinet 29. A first rapid air duct 22 is installed above the frequency converter cabinet 21, with a first axial fan 23 at its end. The air outlet extends into the guide cavity on the inner wall of the air-water cooling unit 2.

[0043] The internal circulation of the air-water cooling system 2 involves hot air from the inverter passing through the first blast duct 22, then being cooled by the cooler. The first axial fan 23 then delivers the cooled air to the inverter environment. The heat dissipation paths of the transformer and inverter are identical, ensuring consistent thermal management.

[0044] There are two outdoor ducts 27, one for absorbing cold air from the outdoors and the other for discharging hot air from the indoors.

[0045] The booster fan has greater air volume and pressure than the fan on the top of the circulating pump inverter 1 cabinet. When the fan on the top of the circulating pump inverter 1 cabinet fails, it will not affect the cooling of the circulating pump inverter 1.

[0046] Outdoor cold air is introduced through the air inlet duct, and is discharged after heat exchange with the internal circulating hot air through the air-water cooling device 2.

[0047] Furthermore, the emergency switch baffle 28 includes a baffle 281 having the same size as the inner diameter of the outdoor pipe 27 , and a handle 282 installed at one end of the baffle 281 .

[0048] The emergency switch damper 28 on the outdoor pipeline 27 controls the opening and closing of the outdoor pipeline 27 .

[0049] The baffle 281 is manually switched to two modes by the handle 282: in normal mode, the baffle 281 is closed and the hot air is discharged through the seawater cooler 33; in emergency mode, the baffle 281 is opened and the hot air is directly discharged to the outdoors, while cold air is sucked in from the outdoor intake 20.

[0050] One end of the circulating water pump 4 is fixedly connected to a condenser 5 .

[0051] The condenser 5 delivers water to the circulating water pump 4 , so that the circulating water pump 4 pumps water more quickly, thereby increasing the water delivery efficiency of the circulating water pump 4 .

[0052] An inspection hole is installed on the seawater cooler 3 for cooling the seawater cooler 3 .

[0053] The circulating water pump 4 is started, and water flows into the seawater cooler 3 from the pump outlet pipe.

[0054] The booster fan in the air-water cooling device 2 is turned on, and its air volume is set to 120% of the rated value of the fan on the top of the frequency conversion cabinet 21.

[0055] The hot air generated by the inverter is drawn into the air-to-water cooling unit 2 by the cabinet-top fan, where it exchanges heat with the circulating water. The cooled air then passes through the axial flow fan and is returned to the inverter, forming a closed loop. The seawater cooler 3 transfers heat to the circulating water, which is then discharged into the forebay.

[0056] The operator opens the emergency switch damper 28 through the handle 282 and switches to the outdoor circulation mode: exhaust path: hot air is directly discharged to the external environment through the outdoor pipe 27; air intake path: cold air is inhaled through the outdoor suction port, bypassing the seawater cooler 3.

[0057] When overhauling seawater cooler 3, shut down the cooler and stop the circulating water supply. Keep the booster fan running to ensure stable wind pressure inside the circulating pump inverter 1. Use a high-pressure water gun to flush the titanium alloy tube bundle to remove marine organisms and debris.

[0058] Check the corrosion of the pipe wall. If the wall thickness is less than 2mm (original design 3mm), replace it partially.

[0059] Referring to 3, in some embodiments, the baffle 281 installed on the inner wall of the pipe will be blocked by the pipe in the opening and closing state, so the baffle 281 is designed as a three-section structure, and the three sections of the baffle 281 are connected by hinges. When the handle 282 opens the baffle 281, the three sections of the baffle 281 are bent to prevent the baffle 281 from being blocked by the inner wall of the pipe when opening and closing.

[0060] Finally, it should be pointed out that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways without departing from the scope of the present invention.

Claims

1. A device for cooling a frequency converter using a water pump's own medium, characterized by: include, The air inlet pipe of the circulating pump frequency converter (1) is connected to the air duct of the air-water cooling device (2), and the air outlet pipe thereof is connected to the seawater cooler (3); A circulating water pump (4) is installed at one end of the seawater cooler (3); Water enters the seawater cooler (3) from the circulating water pump (4), the seawater cooler (3) cools the air-water cooling device (2), and the air-water cooling device (2) delivers cold air to the circulating pump frequency converter (1).

2. The device for cooling a frequency converter using the water pump's own medium according to claim 1, characterized in that: The air-water cooling device (2) comprises: Frequency conversion cabinet (21) and voltage conversion cabinet (29); A first rapid air duct (22) is fixedly connected above the frequency conversion cabinet (21), a first axial flow fan (23) is installed at one end of the first rapid air duct (22), and an air outlet of the first axial flow fan (23) is fixedly connected to the inner wall of the air-water cooling device (2).

3. The device for cooling a frequency converter using the water pump's own medium according to claim 2, characterized in that: A first connecting valve (24) is installed on the first rapid air duct (22).

4. The device for cooling a frequency converter using the water pump's own medium according to claim 3, characterized in that: A second rapid air duct (25) is fixedly connected above the transformer cabinet (29), a second axial flow fan (26) is installed at one end of the second rapid air duct (25), and an air outlet of the second axial flow fan (26) is fixedly connected to the inner wall of the air-water cooling device (2).

5. The device for cooling a frequency converter using the water pump's own medium according to claim 4, characterized in that: A second connecting valve is installed on the second rapid air duct (25).

6. The device for cooling a frequency converter using the water pump's own medium according to claim 5, characterized in that: The air-water cooling device (2) further comprises an outdoor pipe (27), wherein an emergency switching baffle (28) is installed in the outdoor pipe (27).

7. The device for cooling a frequency converter using the water pump's own medium according to claim 6, characterized in that: The emergency switching baffle (28) comprises a baffle (281) having the same inner diameter as the outdoor pipe (27), and a handle (282) installed at one end of the baffle (281).

8. The device for cooling a frequency converter using the water pump's own medium according to claim 7, characterized in that: A booster fan is installed in the air duct connecting the air-water cooling device (2) and the circulating pump frequency converter (1).

9. The device for cooling a frequency converter using the water pump's own medium according to claim 8, characterized in that: One end of the circulating water pump (4) is fixedly connected to a condenser (5).

10. The device for cooling a frequency converter using the water pump's own medium according to claim 9, characterized in that: The seawater cooler (3) is provided with an inspection hole.

Images