A cooling water supply system for high-power power electronic equipment

Abstract

The present invention discloses a cooling water supply system for high-power power electronic equipment, comprising a water supply device body and an external heat exchanger, the water supply device body comprising a main circulation loop and a deionization branch, the main circulation loop comprising a water pump, a first pipe section connecting the liquid outlet of the cooling water supply system on the heating element side and the liquid inlet of the water pump, a second pipe section connecting the liquid outlet of the water pump and the liquid inlet of the external heat exchanger, and a third pipe section connecting the liquid outlet of the external heat exchanger and the liquid inlet of the cooling water supply system on the heating element side; the cooling water supply device of the cooling water supply system for high-power power electronic equipment has a compact structure, is convenient for integrating the cooling device and the converter, and is uniformly configured, which is convenient for debugging and maintenance; the system integrates exhaust, voltage stabilization, and online liquid replenishment functions, has a compact structure, and requires a small installation space; has higher reliability, and is conducive to maintenance.

Description

Technical Field

[0001] The present invention relates to the technical field of heat dissipation of power electronic equipment, and in particular to a cooling water supply system for high-power power electronic equipment. Background Art

[0002] High-power converters, SVGs, and converters generate significant losses during operation, dissipated as heat. As device losses increase and overall size decreases, power density increases significantly. Power devices typically utilize air or water cooling. Traditional air cooling no longer meets the demands of high-power devices. Currently, water cooling has become the preferred cooling solution for high-power electronic devices such as MW-class converters, frequency converters, and SVGs. Cooled water is driven through a water supply device into the heating element. After absorbing heat, the cooling water enters an external heat exchanger, exchanges heat with the air, and then returns to the heating element as a low-temperature coolant, cooling and exchanging heat in a repetitive cycle.

[0003] Existing cooling systems typically consist of a main circulation loop and a deionization branch. The main circulation loop is equipped with key components such as a water pump, filter, external heat exchanger, and sensors. The deionization branch is equipped with a liquid filling tank and deionization tank. A bladder-type buffer tank is connected to the main circulation water pump's water inlet or outlet via a pipe. In actual use, existing cooling water supply systems have been found to have the following drawbacks: the system is complex, costly, and requires extensive commissioning and maintenance. The use of bladder-type expansion tanks for voltage stabilization often leads to damage and failure, impacting the operation of the entire system. The closed cooling system has difficulty venting, and the presence of gas makes the water cooling system unstable. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to propose a cooling water supply system for high-power power electronic equipment. The cooling water supply device of the cooling water supply system for high-power power electronic equipment has a compact structure, which facilitates the integration of the cooling device and the converter for unified configuration, and facilitates debugging and maintenance. The system integrates exhaust, voltage stabilization, and online fluid replenishment functions, has a compact structure, and requires a small installation space. It has higher reliability and is conducive to maintenance.

[0005] To solve the above technical problems, the present invention provides a cooling water supply system for high-power power electronic equipment, comprising a water supply device body and an external heat exchanger, wherein the water supply device body is connected to the external heat exchanger via a connection port, and the water supply device body is connected to the heating element of the high-power power electronic equipment, the water supply device body comprising a main circulation loop and a deionization branch, the main circulation loop comprising a water pump, a first pipe section connecting the liquid outlet of the cooling water supply system on the heating element side with the liquid inlet of the water pump, a second pipe section connecting the liquid outlet of the water pump with the liquid inlet of the external heat exchanger, and a third pipe section connecting the liquid outlet of the external heat exchanger with the liquid inlet of the cooling water supply system on the heating element side;

[0006] A deionization branch is provided between the third pipe section and the first pipe section, and the water supply device body is provided with a liquid filling port for adding coolant. The deionization branch includes a deionization branch body, a buffer tank assembly provided on the deionization branch body and used for system exhaust and pressure stabilization, and a deionization tank used to adsorb ions in the coolant and ensure that the coolant maintains low conductivity.

[0007] Preferably, the buffer tank assembly includes a buffer tank, a first buffer tank branch and a second buffer tank branch, the first buffer tank branch is provided with a first control valve, the second buffer tank branch is provided with a second control valve, and the buffer tank is connected to the deionization branch body through the first buffer tank branch and the second buffer tank branch.

[0008] Preferably, the buffer tank assembly further comprises an air supply pump, a safety valve, and a manual exhaust valve which are arranged on the buffer tank, and the safety valve and the manual exhaust valve are connected in parallel on the same pipeline.

[0009] Preferably, the buffer tank assembly also includes a third buffer tank branch for adding liquid to the main circulation loop and preventing the coolant from flowing back. One end of the third buffer tank branch is connected to the buffer tank, and the other end of the third buffer tank branch is connected to the deionization branch body. The third buffer tank branch includes a fourth control valve, a one-way valve, and a water supply pump. The one-way valve and the water supply pump are connected in series on the same pipeline.

[0010] Preferably, the positions of the first buffer tank branch and the second buffer tank branch are higher than that of the third buffer tank branch.

[0011] Preferably, the cooling water supply system for high-power power electronic equipment also includes a flow limiting structure for controlling the flow of coolant in the main circulation loop, and the flow limiting structure includes a third control valve arranged at the connection position between the first buffer tank branch and the second buffer tank branch and the deionization branch body.

[0012] Preferably, a flow meter and a precision filter are also provided on the deionization branch.

[0013] Preferably, the main circulation loop also includes a three-way valve and a fourth pipe section, the first end of the three-way valve is connected to the water pump outlet, the second end of the three-way valve is connected to the liquid inlet of the external heat exchanger, the third end of the three-way valve is connected to the third pipe section through the fourth pipe section, and the connection point between the third end of the three-way valve and the third pipe section is close to the liquid outlet of the external heat exchanger.

[0014] Preferably, the main circulation loop further includes a check valve, and the check valve is arranged on the liquid outlet side or the liquid inlet side of the water pump.

[0015] Preferably, the main circulation loop also includes a heater, a first pressure sensor, a second pressure sensor, a temperature sensor and a conductivity sensor. The first pressure sensor, temperature sensor and conductivity sensor are arranged on the side of the third pipe section close to the heating element, the second pressure sensor is arranged on the side of the first pipe section close to the heating element, and the heater is arranged on the first pipe section and located between the second pressure sensor and the water pump.

[0016] After adopting the above system, the cooling water supply system for high-power power electronic equipment includes a water supply device body and an external heat exchanger, the water supply device body is connected to the external heat exchanger through a connection port, the water supply device body is connected to the heating element of the high-power power electronic equipment, the water supply device body includes a main circulation loop and a deionization branch, the main circulation loop includes a water pump, a first pipe section connecting the liquid outlet of the cooling water supply system on the heating element side and the liquid inlet of the water pump, a second pipe section connecting the liquid outlet of the water pump and the liquid inlet of the external heat exchanger, a third pipe section connecting the liquid outlet of the external heat exchanger and the liquid inlet of the cooling water supply system on the heating element side segment; a deionization branch is provided between the third pipe segment and the first pipe segment, and a liquid filling port for adding coolant is provided on the first pipe segment or the deionization branch, and the deionization branch includes a deionization branch body, a buffer tank assembly provided on the ion branch body and used for system exhaust and pressure stabilization, and a deionization tank for adsorbing ions in the coolant and ensuring that the coolant maintains low conductivity; the cooling water supply device of the cooling water supply system for high-power power electronic equipment has a compact structure, which is convenient for integrating the cooling device and the converter for unified configuration, and convenient debugging and maintenance; the system integrates exhaust, pressure stabilization, and online liquid replenishment functions, has a compact structure, and a small installation space; it has higher reliability and is conducive to maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is an overall structural diagram of a cooling water supply system for high-power power electronic equipment according to a first embodiment of the present invention;

[0018] Figure 2 This is an overall structural diagram of a cooling water supply system for high-power power electronic equipment according to a third embodiment of the present invention;

[0019] Figure 3 This is an overall structural diagram of a cooling water supply system for high-power power electronic equipment according to the fifth embodiment of the present invention. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Example 1

[0021] See also Figure 1 , Figure 1 This is an overall structural diagram of a cooling water supply system for high-power power electronic equipment according to a first embodiment of the present invention;

[0022] This embodiment discloses a cooling water supply system for high-power power electronic equipment, including a water supply device body 100 and an external heat exchanger 300. The water supply device body 100 is connected to the external heat exchanger 300, and the water supply device body 100 is connected to the heating element 200 of the high-power power electronic equipment. The water supply device body 100 includes a main circulation loop 400 and a deionization branch 500. The main circulation loop 400 includes a water pump 01, a first pipe section 401 connecting the liquid outlet of the cooling water supply system on the heating element 200 side and the liquid inlet of the water pump 01, a second pipe section 402 connecting the liquid outlet of the water pump 01 and the liquid inlet of the external heat exchanger 300, and a third pipe section 403 connecting the liquid outlet of the external heat exchanger 300 and the liquid inlet of the cooling water supply system on the heating element side.

[0023] A deionization branch 500 is arranged between the third pipe section 403 and the first pipe section 401. The water supply device body 100 is provided with a liquid filling port for adding coolant. The deionization branch 500 includes a deionization branch body, a buffer tank assembly arranged on the ion branch body and used for system exhaust and pressure stabilization, and a deionization tank 07 for adsorbing ions in the coolant and ensuring that the coolant maintains low conductivity. Example 2

[0024] This embodiment is based on the first embodiment. In this embodiment, the buffer tank assembly includes a buffer tank 13, a first buffer tank branch 501 and a second buffer tank branch 502. The first buffer tank branch 501 is provided with a first control valve 10, and the second buffer tank branch is provided with a second control valve 11. The buffer tank 13 is connected to the deionization branch body through the first buffer tank branch 501 and the second buffer tank branch 502.

[0025] In this embodiment, the buffer tank assembly further includes an air supply pump 14 , a safety valve 16 , and a manual exhaust valve 15 , which are arranged on the buffer tank 13 . The safety valve 16 and the manual exhaust valve 15 are connected in parallel on the same pipeline.

[0026] The air supply pump 14 is used to pump air into the buffer tank 13 and increase the static pressure of the cooling water supply system.

[0027] The manual exhaust valve on the buffer tank 13 is used to quickly discharge the gas in the tank. The buffer tank is provided with one or more liquid level switches, which can automatically detect the liquid level height in the buffer tank 13 and remind maintenance personnel to add liquid when the liquid level is lower than the threshold value; the buffer tank 13 is provided with a liquid filling port, and liquid can be added through the liquid filling port when the system is added for the first time or when the liquid level is low.

[0028] In this embodiment, the cooling water supply system preferably used for high-power power electronic equipment also includes a flow limiting structure for controlling the flow of coolant in the main circulation loop 400, and the flow limiting structure includes a third control valve 09 arranged at the connection position between the first buffer tank branch 501 and the second buffer tank branch 502 and the deionization branch body.

[0029] When the system operates normally, the first control valve 10 and the second control valve 11 are opened, and the third control valve 09 and the fourth control valve 19 are closed, and the buffer tank plays a buffering and degassing role. Example 3

[0030] See also Figure 2 , Figure 2 This is an overall structural diagram of a cooling water supply system for high-power power electronic equipment according to a third embodiment of the present invention;

[0031] This embodiment is based on the second embodiment. In this embodiment, the buffer tank assembly also includes a third buffer tank branch 503 for adding liquid to the main circulation loop 400 and preventing the coolant from flowing back. One end of the third buffer tank branch 503 is connected to the buffer tank 13, and the other end of the third buffer tank branch 503 is connected to the deionization branch body. The third buffer tank branch 503 includes a fourth control valve 19, a one-way valve 17, and a water supply pump 18. The one-way valve 17 and the water supply pump 18 are connected in series on the same pipeline.

[0032] The first buffer tank branch 501 and the second buffer tank branch 502 are located higher than the third buffer tank branch 503 .

[0033] In this embodiment, a flow meter 46 and a precision filter 08 are further provided on the deionization branch.

[0034] When the system operates normally, the first control valve 10 and the second control valve 11 are opened, and the third control valve 09 is closed, and the buffer tank plays a buffering and degassing role.

[0035] When the liquid level in the buffer tank 13 is low, close the first control valve 10, the second control valve 11 and the third control valve 09, open the fourth control valve 19, open the manual exhaust valve 15 on the buffer tank 13 to exhaust, add liquid from the liquid filling port of the buffer tank 13, and then increase the pressure in the buffer tank 13 through the air supply pump 14, restore the status of the first control valve 10 and the second control valve 11, and complete the online liquid addition. Example 4

[0036] This embodiment is based on the first embodiment. In this embodiment, the main circulation loop also includes a three-way valve 05 and a fourth pipe section 407. The first end of the three-way valve 05 is connected to the liquid outlet of the water pump 01, the second end of the three-way valve 05 is connected to the liquid inlet of the external heat exchanger 300, and the third end of the three-way valve 05 is connected to the third pipe section 403 through the fourth pipe section 407. The connection point between the third end of the three-way valve and the third pipe section 403 is close to the liquid outlet of the external heat exchanger 300.

[0037] In this embodiment, the main circulation loop further includes a check valve 03 , which is arranged on the liquid outlet side or the liquid inlet side of the water pump 01 .

[0038] The main circulation loop 400 also includes a heater 06, a first pressure sensor 41, a second pressure sensor 44, a temperature sensor 42 and a conductivity sensor 43. The first pressure sensor 41, the temperature sensor 42 and the conductivity sensor 43 are arranged on the side of the third pipe section 403 close to the heating element 200, the second pressure sensor 44 is arranged on the side of the first pipe section 401 close to the heating element 200, and the heater 06 is arranged on the first pipe section and is located between the second pressure sensor 44 and the water pump 01. Example 5

[0039] See also Figure 3 , Figure 3 This is an overall structural diagram of a cooling water supply system for high-power power electronic equipment according to the fifth embodiment of the present invention.

[0040] This embodiment is based on embodiment one. In this embodiment, the positions of the buffer tank assembly and the deionization tank 07 of the deionization branch 500 are as follows: the deionization tank 07 is arranged on the deionization branch body near the third pipe section 403, and the buffer tank assembly is arranged on the deionization branch body near the first pipe section 401.

[0041] The cooling water supply device of the cooling water supply system for high-power power electronic equipment has a compact structure, which makes it easy to integrate the cooling device and the converter for unified configuration, facilitating commissioning and maintenance. The system integrates exhaust, voltage stabilization, and online fluid replenishment functions in a compact structure and requires little installation space. It also offers higher reliability and facilitates maintenance.

[0042] It should be understood that the above are only preferred embodiments of the present invention and cannot limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A cooling water supply system for high-power electronic equipment, characterized in that: The water supply device comprises a water supply device body and an external heat exchanger, wherein the water supply device body is connected to the external heat exchanger, and the water supply device body is connected to the heating element of the high-power power electronic device. The water supply device body comprises a main circulation loop and a deionization branch. The main circulation loop comprises a water pump, a first pipe section connecting the liquid outlet of the cooling water supply system on the heating element side with the liquid inlet of the water pump, a second pipe section connecting the liquid outlet of the water pump with the liquid inlet of the external heat exchanger, and a third pipe section connecting the liquid outlet of the external heat exchanger with the liquid inlet of the cooling water supply system on the heating element side. The deionization branch is provided between the third pipe section and the first pipe section, the water supply device body is provided with a liquid filling port for adding coolant, the deionization branch includes a deionization branch body, a buffer tank assembly provided on the deionization branch body and used for system exhaust and pressure stabilization, and a deionization tank for adsorbing ions in the coolant and ensuring that the coolant maintains low conductivity; The buffer tank assembly includes a buffer tank, a first buffer tank branch and a second buffer tank branch, the first buffer tank branch is provided with a first control valve, the second buffer tank branch is provided with a second control valve, and the buffer tank is connected to the deionization branch body through the first buffer tank branch and the second buffer tank branch; The buffer tank assembly also includes a third buffer tank branch for adding liquid to the main circulation loop and preventing coolant backflow. One end of the third buffer tank branch is connected to the buffer tank, and the other end of the third buffer tank branch is connected to the deionization branch body. The third buffer tank branch includes a fourth control valve, a one-way valve, and a water supply pump. The one-way valve and the water supply pump are connected in series on the same pipeline.

2. The cooling water supply system for high-power electronic equipment according to claim 1, characterized in that: The buffer tank assembly further includes an air supply pump, a safety valve, and a manual exhaust valve which are arranged on the buffer tank. The safety valve and the manual exhaust valve are connected in parallel on the same pipeline.

3. The cooling water supply system for high-power electronic equipment according to claim 1, characterized in that: Positions of the first buffer tank branch and the second buffer tank branch are higher than a position of the third buffer tank branch.

4. The cooling water supply system for high-power electronic equipment according to claim 1, characterized in that: The cooling water supply system for high-power power electronic equipment also includes a flow limiting structure for controlling the flow of coolant in the main circulation loop. The flow limiting structure includes a third control valve arranged at the connection position between the first buffer tank branch and the second buffer tank branch and the deionization branch body.

5. The cooling water supply system for high-power electronic equipment according to claim 1, characterized in that: The deionization branch is also provided with a flow meter and a precision filter.

6. The cooling water supply system for high-power electronic equipment according to claim 1, characterized in that: The main circulation loop also includes a three-way valve and a fourth pipe section, the first end of the three-way valve is connected to the water outlet of the water pump, the second end of the three-way valve is connected to the liquid inlet of the external heat exchanger, and the third end of the three-way valve is connected to the third pipe section through the fourth pipe section. The connection point between the third end of the three-way valve and the third pipe section is close to the liquid outlet of the external heat exchanger.

7. The cooling water supply system for high-power electronic equipment according to claim 1, characterized in that: The main circulation loop further includes a check valve, which is arranged on the liquid outlet side or the liquid inlet side of the water pump.

8. The cooling water supply system for high-power electronic equipment according to claim 1, characterized in that: The main circulation loop also includes a heater, a first pressure sensor, a second pressure sensor, a temperature sensor and a conductivity sensor. The first pressure sensor, temperature sensor and conductivity sensor are arranged on the side of the third pipe section close to the heating element, the second pressure sensor is arranged on the side of the first pipe section close to the heating element, and the heater is arranged on the first pipe section and located between the second pressure sensor and the water pump.

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