CN115163471A - Cooling system of water-feeding pump frequency converter and water-feeding pump frequency converter - Google Patents
Cooling system of water-feeding pump frequency converter and water-feeding pump frequency converter Download PDFInfo
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- CN115163471A CN115163471A CN202210788021.9A CN202210788021A CN115163471A CN 115163471 A CN115163471 A CN 115163471A CN 202210788021 A CN202210788021 A CN 202210788021A CN 115163471 A CN115163471 A CN 115163471A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B23/00—Pumping installations or systems
- F04B23/04—Combinations of two or more pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
- H05K7/20272—Accessories for moving fluid, for expanding fluid, for connecting fluid conduits, for distributing fluid, for removing gas or for preventing leakage, e.g. pumps, tanks or manifolds
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
- H05K7/20281—Thermal management, e.g. liquid flow control
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- Microelectronics & Electronic Packaging (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The invention discloses a cooling system of a water-feeding pump frequency converter and the water-feeding pump frequency converter, wherein the cooling system of the water-feeding pump frequency converter comprises a pure water cooling subsystem, an air-water cooling subsystem and a closed cooling water supply subsystem, wherein the pure water cooling subsystem is used for cooling a power unit of the frequency converter, the air-water cooling subsystem is used for cooling a transformer of the frequency converter, and the closed cooling water supply subsystem is used for cooling water in the pure water cooling subsystem and cooling air in the air-water cooling subsystem, so that the pure water cooling subsystem and the air-water cooling subsystem can continuously cool the frequency converter. Therefore, the cooling system provided by the embodiment of the invention can carry out more targeted cooling on the frequency converter so as to improve the cooling effect of the frequency converter, thereby prolonging the service life of the frequency converter and simultaneously reducing the operation cost and the occupied volume of the cooling system.
Description
Technical Field
The invention relates to the technical field of cooling systems, in particular to a cooling system of a water feeding pump frequency converter and the water feeding pump frequency converter.
Background
With the increase of the utilization rate of the medium-high voltage frequency converter, how to stably operate the frequency converter for a long time also becomes a problem which is very important for users, and the heat dissipation problem of the frequency converter plays a very critical role in the long-term stable operation of the whole frequency converter system. Although the high-voltage frequency converter speed regulating system is a very efficient speed regulating device, the high-voltage frequency converter speed regulating system still has about 2% -4% of loss in operation, and the loss is converted into heat and finally dissipated in the atmosphere. This heat must be removed from the system to ensure that the temperature rise is not too high to affect normal operation. Therefore, the ventilation system of the medium-high voltage frequency converter needs to be designed for different field application environments. How to smoothly carry out the heat from the frequency converter is a very important problem in the design of the frequency converter.
In the related art, the frequency converter is generally cooled by means of air duct circulation heat dissipation, air exhaust fan heat dissipation, air-conditioning closed cooling and the like, but the methods have the defects of limited use environment, overlarge air conditioner, overhigh cost and the like.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, a first object of the present invention is to provide a cooling system for a water-feeding pump frequency converter, which can perform more targeted cooling on the frequency converter to improve the cooling effect of the frequency converter, thereby improving the service life of the frequency converter, and simultaneously reducing the operation cost and the occupied volume of the cooling system.
The second purpose of the invention is to provide a frequency converter of the water feeding pump.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides a cooling system for a frequency converter of a feed water pump, where the cooling system includes a pure water cooling subsystem, an air water cooling subsystem, and a closed cooling water supply subsystem; the pure water cooling subsystem comprises a water cooling cabinet, an inner cooling water outlet and an inner cooling water inlet of the water cooling cabinet are respectively connected with a power unit water cooling plate of the frequency converter so as to cool the power unit through inner cooling water, and an outer cooling water outlet and an outer cooling water inlet of the water cooling cabinet are respectively connected with the closed cooling water supply subsystem so as to cool the inner cooling water through the closed cooling water supply subsystem; the air-water cooling subsystem comprises an air-water cooling air cabinet and a cooling air channel, a fan is arranged in the cooling air channel, the fan blows air cooled by the air-water cooling air cabinet to the cooling air channel to be right, a transformer in the frequency converter is cooled, an external cooling water outlet and an external cooling water inlet of the air-water cooling air cabinet are respectively connected with the closed cooling water supply subsystem to be passed through the closed cooling water supply subsystem is right air in the cooling air channel is cooled.
The cooling system of the water-feeding pump frequency converter comprises a pure water cooling subsystem, an air-water cooling subsystem and a closed cooling water supply subsystem, wherein the pure water cooling subsystem is used for cooling a power unit of the frequency converter, the air-water cooling subsystem is used for cooling a transformer of the frequency converter, and the closed cooling water supply subsystem is used for cooling water in the pure water cooling subsystem and air in the air-water cooling subsystem, so that the pure water cooling subsystem and the air-water cooling subsystem can continuously cool the frequency converter. Therefore, the cooling system provided by the embodiment of the invention can carry out more targeted cooling on the frequency converter so as to improve the cooling effect of the frequency converter, thereby prolonging the service life of the frequency converter and simultaneously reducing the operation cost and the occupied volume of the cooling system.
In some embodiments of the present invention, the closed cooling water supply subsystem includes a closed water tank, at least one closed water plate heat exchanger, and at least one closed circulation cooling water pump, the closed circulation cooling water pump is connected to the closed water tank and the closed water plate heat exchanger, respectively, and is configured to pump closed water in the closed water tank to a closed water inlet of the closed water plate heat exchanger, the closed water plate heat exchanger cools the closed water and conveys the cooled closed water to the water cooling cabinet and the air-water cooling air cabinet through a closed water outlet, an open water inlet of the closed water plate heat exchanger is connected to an external open water supply main pipe, and an open water outlet of the closed water plate heat exchanger is connected to an open water return main pipe, so as to cool the closed water passing through the closed water plate heat exchanger through the external open water.
In some embodiments of the present invention, the closed cooling water supply subsystem includes a plurality of closed circulation cooling water pumps and a plurality of closed water plate heat exchangers, the plurality of closed circulation cooling water pumps are connected in parallel, the number of the closed water plate heat exchangers is the same as that of the closed water circulation cooling water pumps, closed water inlets of the plurality of closed water plate heat exchangers are connected with water outlets of the plurality of closed circulation cooling water pumps in a one-to-one correspondence manner, and closed water outlets of the plurality of closed water plate heat exchangers are connected and then connected with the water cooling cabinet and the air-water cooling air cabinet.
In some embodiments of the present invention, the closed water inlet, the closed water outlet, the open water inlet and the open water outlet of the closed water plate heat exchanger are all provided with valves.
In some embodiments of the invention, the water outlet of the closed circulation cooling water pump is provided with a check valve, and the water inlet of the closed circulation cooling water pump is provided with an inlet filter screen.
In some embodiments of the invention, a drain valve is arranged in a connecting pipeline between the open water inlet of the closed water plate heat exchanger and the external open water supply main pipe, and/or a drain valve is arranged in a connecting pipeline between the open water outlet of the closed water plate heat exchanger and the external open water return main pipe, and the drain valve is used for discharging sewage in the connecting pipeline.
In some embodiments of the invention, the water cooling cabinet comprises a water cooling cabinet plate heat exchanger and at least one water cooling cabinet circulating water pump, the water cooling cabinet circulating water pump is used for controlling the circulation of the internal cooling water between the water cooling cabinet and the water cooling plates of the power unit, and the water cooling cabinet plate heat exchanger is used for completing heat exchange with the closed cooling water supply subsystem.
In some embodiments of the invention, the water cooling cabinet comprises a plurality of water cooling cabinet circulating water pumps, the plurality of water cooling cabinet circulating water pumps are connected in parallel, and at least one water cooling cabinet circulating water pump is in an operating state when the cooling system is in operation.
In some embodiments of the invention, a check valve is arranged at a water outlet of the water cooling cabinet circulating water pump, and an inlet filter screen is arranged at a water inlet of the water cooling cabinet circulating water pump.
In order to achieve the above object, a second aspect of the present invention provides a feed-water pump frequency converter, which includes the cooling system according to the above embodiment.
According to the water-feeding pump frequency converter, the cooling system in the embodiment enables the frequency converter to carry out more targeted cooling so as to improve the cooling effect of the frequency converter, prolong the service life of the frequency converter and reduce the operation cost and the occupied volume of the cooling system.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a schematic diagram of a cooling system for a feed pump inverter according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a cooling system for a feed pump inverter according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an air-water cooling subsystem according to an embodiment of the invention;
FIG. 4 is a block diagram of a feed pump inverter according to an embodiment of the invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The cooling system of a feed pump inverter and the feed pump inverter according to the embodiment of the invention are described below with reference to the drawings.
Firstly, it should be noted that when the frequency converter exceeds 6000KW, a common cooling method cannot meet the heat dissipation requirement of the equipment, and it is described by taking the rated loss of the frequency converter as 4% of the rated power as an example, the specific loss distribution of the frequency converter generally has four parts, that is, the loss of a power unit such as an IGBT (Insulated Gate Bipolar Transistor) and a rectifier bridge part can account for about 45% of the loss of the frequency converter system, the loss of a transformer can account for about 45% of the loss of the frequency converter system, and the loss of other stray heat, for example, the loss of a cable, a copper bar, a capacitor and other devices, also approximately accounts for 10% of the loss of the frequency converter system.
The analysis shows that the main loss of the frequency converter is caused by the loss of the transformer and the power unit, and occupies about 90 percent, and if the model selection power of the frequency converter in the Jingong power plant is taken as an example, the rated power of the frequency converter is determined to be 11000KW, the rated loss of the transformer and the power unit is close to 400KW. The research shows that the main contradiction of the operation state of the domestic frequency converter is concentrated on the heat dissipation of the power unit, and because the devices in the power unit are arranged compactly, a large number of precise power devices and circuit boards are arranged, and the heat dissipation mode directly influences the normal work and the service life of the power unit, the cooling system of the embodiment cools the power unit in a pure cold water cooling mode so that the power unit can dissipate heat quickly. And then adopt the air-water cooling mode to cool off to the transformer, because if the transformer adopts direct water-cooled mode, its winding needs to adopt the through-flow refrigerated mode of air traffic control, middle through-flow liquid can multiple choice, deionized water is the most economic selection, but even adopt the mode of deionized water, the preparation technology to the air traffic control of winding requires very strictly, manufacturing cost still remains high, so the cooling system of this embodiment adopts the air-water cooling mode to cool off the transformer, when greatly reduced cooling cost, can also guarantee the cooling effect of transformer.
The cooling system of the present embodiment is described in detail below, and fig. 1 is a schematic structural diagram of a cooling system of a feed-water pump inverter according to an embodiment of the present invention.
As shown in fig. 1, the present invention provides a cooling system 1 for a water-feeding pump frequency converter, a solid line shown in the figure represents cooling water before heat exchange, and a dotted line represents cooling water after heat exchange, and the cooling system 1 in this embodiment includes a pure water cooling subsystem 10, an air-water cooling subsystem 20, and a closed cooling water supply subsystem 30.
The pure water cooling subsystem 10 comprises a water cooling cabinet 11, an internal cooling water outlet 114 and an internal cooling water inlet 113 of the water cooling cabinet 11 are respectively connected with the power unit water cooling plate 2 of the frequency converter so as to cool the power unit through internal cooling water, and an external cooling water outlet 115 and an external cooling water inlet 116 of the water cooling cabinet 11 are respectively connected with the closed cooling water supply subsystem 30 so as to cool the internal cooling water through the closed cooling water supply subsystem 30; the air-water cooling subsystem 20 comprises an air-water cooling air cabinet 21 and a cooling air duct 22, a fan 23 is arranged in the cooling air duct 22, the fan 23 blows air cooled by the air-water cooling air cabinet 21 to the cooling air duct 22 to cool a transformer in the frequency converter, and an external cooling water outlet 212 and an external cooling water inlet 211 of the air-water cooling air cabinet 21 are respectively connected with the closed cooling water supply subsystem 30 to cool the air in the cooling air duct 22 through the closed cooling water supply subsystem 30.
Specifically, it should be noted that, firstly, the cooling system 1 shown in fig. 1 includes two pure water cooling subsystems 10, four air-water cooling subsystems 20, and a redundantly designed closed cooling water supply subsystem 30, in this embodiment, only one of the subsystems is described, and other identical subsystems may refer to such subsystems, which is not described again, and it can be understood that the number of the designed subsystems in this embodiment is specifically determined according to the needs of the actual application scenario, and the number of the designed subsystems is not specifically limited in this application.
As shown in fig. 1, the pure water cooling subsystem 10 includes a water cooling cabinet 11, the water cooling cabinet 11 is connected with a power unit water cooling plate 2 and a closed cooling water supply subsystem 30 respectively, wherein, the closed cooling water supply subsystem 30 can cool water in the water cooling cabinet 11, then the water cooling cabinet 11 supplies the water cooled by the closed cooling water supply subsystem 30 to the power unit water cooling plate 2, so as to cool the power unit water cooling plate 2, and then the power unit water cooling plate 2 can cool the power unit, so as to achieve the purpose of cooling the power unit of the frequency converter. Moreover, it can be understood that the power unit water-cooling plate 2 is directly cooled by pure water, and the temperature of the power unit water-cooling plate 2 can be rapidly reduced to take away heat generated by the power unit in the working process.
The air-water cooling subsystem 20 includes an air-water cooling air cabinet 21 and a cooling air duct 22 connected to each other, and the cooling air duct 22 is connected to a transformer (not shown in the figure) in the frequency converter, and the air-water cooling air cabinet 21 can cool air in the cooling air duct 22 and cool the transformer by the cooled air so as to take away heat generated by the transformer in the working process. A fan 23 is further disposed in the cooling air duct 22, and the fan 23 can blow air cooled by the air-water cooling air cabinet 21 in the cooling air duct 22 to the cooling air duct 22, so as to cool the transformer through the cooling air duct 22.
More specifically, as shown in fig. 2, fig. 2 is a top view of a frequency converter room according to an embodiment of the present invention, wherein cooling water of the closed cooling water supply subsystem 30 (not shown in fig. 2) in fig. 1 can flow into the air-water cooling air cabinet 21 through a pipeline, air in the cooling air duct 22 is cooled by the air-water cooling air cabinet 21, and the cooled air is blown to the other end of the cooling air duct 22 by the fan 23. It should be noted that the other end of the cooling air duct 22 is connected to the transformer, so that the air blown out from the fan 23 can cool the transformer and take away heat generated by the transformer in the working process. Further, it should be noted that fig. 2 shows that a plurality of top-cabinet fans 41 are further disposed on the frequency converter, wherein corresponding top-cabinet fans 41 are disposed on both the top of the cabinet chamber where the transformer is located and the top of the cabinet chamber where the power unit is located, and wherein the top-cabinet fans 41 are used for discharging other stray heat in the frequency converter to the inside of the frequency converter.
As shown in fig. 3, the frequency converter is placed in the frequency converter room, the fan 23 blows the air in the cooling air duct 22 cooled by the air-water cooling air cabinet 21 to the air outlet of the cooling air duct 22, so as to cool the transformer in the frequency converter, and the cabinet top fan 41 arranged at the top end of the frequency converter cabinet can dissipate the stray heat generated by the frequency converter in the working process into the frequency converter room.
In some embodiments of the present invention, as shown in fig. 1, the closed cooling water supply subsystem 30 includes a closed water tank 31, at least one closed water plate heat exchanger 32, and at least one closed circulation cooling water pump 33, where the closed circulation cooling water pump 33 is respectively connected to the closed water tank 31 and the closed water plate heat exchanger 32, and is configured to pump closed water in the closed water tank 31 to a closed water inlet 321 of the closed water plate heat exchanger 32, the closed water plate heat exchanger 32 cools the closed water and conveys the cooled closed water to the water cooling cabinet 11 and the air-water cooling air cabinet 21 through a closed water outlet 322, an open water inlet 324 of the closed water plate heat exchanger 32 is connected to an external open water supply main a, and an open water outlet 323 of the closed water plate heat exchanger 32 is connected to an external open water return main B, so as to cool the closed water passing through the closed water plate heat exchanger 32 with the external open water.
Specifically, as shown in fig. 1, in the specific embodiment shown in fig. 1, the closed cooling water supply subsystem 30 includes the closed water tank 31, two closed water plate heat exchangers 32 and two closed circulation cooling water pumps 33, it can be understood that the closed water plate heat exchangers 32 and the closed circulation cooling water pumps 33 in this specific embodiment are designed redundantly, that is, design through adopting a mode of one-for-one standby, when one of the closed water plate heat exchangers 32 or one closed circulation cooling water pump 33 breaks down, another closed water plate heat exchanger 32 and the closed circulation cooling water pump 33 can be used to participate in the work, so as to ensure that the frequency converter can be timely cooled down, ensure that the frequency converter can normally work, and prolong the service life of the frequency converter.
More specifically, closed water tank 31 is under closed circulative cooling water pump 33's drive, can be with storing the closed water pump who is in closed water tank 31 to closed water plate heat exchanger 32's closed water inlet 321 department, thereby closed water gets into and passes through after closed water plate heat exchanger 32 from closed water inlet 321, can be cooled by outside open water, thereby again will export to water-cooling cabinet 11 and air-water cooling wind cabinet 21 from closed water outlet 322 of closed water plate heat exchanger 32 through refrigerated closed water, then cool off power unit water-cooling board 2 to the converter through water-cooling cabinet 11, and cool off the transformer of converter through air-water cooling wind cabinet 21.
The closed water plate type heat exchanger 32 further comprises an open water outlet 323 and an open water inlet 324, and is connected with an external open jellyfish pipe to cool the closed water through the external open water, specifically, the open water outlet 323 of the closed water plate type heat exchanger 32 is connected with an external open water return water main pipe B, and the open water inlet 324 of the closed water plate type heat exchanger 32 is connected with the external open water supply water main pipe A. It should be noted that the closed water in this embodiment is the external cooling water in the above embodiment.
In some embodiments of the present invention, as shown in fig. 1, the closed cooling water supply subsystem 30 includes a plurality of closed circulation cooling water pumps 33 and a plurality of closed water plate heat exchangers 32, the plurality of closed circulation cooling water pumps 33 are connected in parallel, the number of the closed water plate heat exchangers 32 is the same as that of the closed water circulation cooling water pumps 33, closed water inlets 321 of the plurality of closed water plate heat exchangers 32 are connected with water outlets of the plurality of closed circulation cooling water pumps 33 in a one-to-one correspondence manner, and closed water outlets 322 of the plurality of closed water plate heat exchangers 32 are connected together and connected with the water cooling cabinet 11 and the air-water cooling air cabinet 21 after confluence.
Specifically, as shown in fig. 1, the closed cooling water supply subsystem 30 includes two closed circulation cooling water pumps 33, of course, fig. 1 is described as only one specific embodiment, and in some embodiments, three closed circulation cooling water pumps, four closed circulation cooling water pumps, and the like may also be included, and in the drawing, the two closed circulation cooling water pumps 33 are connected in parallel, and are used for one purpose, so as to improve the fault tolerance of the closed cooling water supply subsystem 30. The closed type cooling water supply subsystem 30 further comprises closed type water plate type heat exchangers 32 the number of which is the same as that of the closed type water circulation cooling water pumps 33, the closed type water plate type heat exchangers 32 are connected with the closed type water circulation cooling water pumps 33 in a one-to-one correspondence mode, it can be understood that one closed type water plate type heat exchanger 32 and one closed type water circulation cooling water pump 33 can cool closed type water, the closed type cooling water pumps 33 and the closed type water plate type heat exchangers 32 are arranged to provide the fault tolerance of the closed type cooling water supply subsystem 30, and when one of the closed type cooling water pumps 33 or the closed type water plate type heat exchangers 32 breaks down, other closed type cooling water pumps 33 or the closed type water plate type heat exchangers 32 can replace the broken-down equipment to complete cooling of the frequency converter. Of course, a plurality of closed circulation cooling water pumps 33 or a plurality of closed water plate heat exchangers 32 may also be simultaneously activated to increase the water flow speed in the pipeline of the cooling system 1, so as to improve the cooling efficiency of the frequency converter.
In some embodiments of the present invention, as shown in fig. 1, valves 34 are disposed near the closed water inlet 321, the closed water outlet 322, the open water inlet 324, and the open water outlet 323 of the closed water plate heat exchanger 32, so that the closed water plate heat exchanger 32 which does not need to participate in the work can be separated from the cooling system 1 by controlling the valves 34, and the closed water plate heat exchanger 32 can be cleaned on line without affecting the normal use of the cooling system 1. More specifically, the valve 34 in the present embodiment may be a manual valve.
In some embodiments of the present invention, as shown in fig. 1, the water outlet of the closed circulation cooling water pump 33 is provided with a check valve 35, and the water inlet of the closed circulation cooling water pump 33 is provided with an inlet screen 36.
Specifically, as shown in fig. 1, the water inlet of the closed circulation cooling water pump 33 is connected with the closed water tank 31, and the water outlet is connected with the closed water inlet 321 of the closed water plate heat exchanger 32, and the check valve 35 is arranged at the water outlet of the closed circulation cooling water pump 33 in the embodiment, so that the backflow phenomenon of the closed water is prevented. And set up entry filter screen 36 at closed recirculating cooling water pump 33's water inlet, then can filter the closed water that gets into closed recirculating cooling water pump 33, reduce the later maintenance volume, improve the cooling effect.
In some embodiments of the present invention, as shown in fig. 1, a blowoff valve 51 is disposed in a connection pipeline between the open water inlet 324 of the closed water plate heat exchanger 32 and the external open water supply main pipe a, and/or a blowoff valve 51 is disposed in a connection pipeline between the open water outlet 323 of the closed water plate heat exchanger 32 and the external open water return main pipe B, and the blowoff valve 51 is used for discharging sewage in the connection pipeline.
In particular, in this embodiment, since the open water is exposed to the indoor environment, it may be affected by dust, corrosive gas, etc., resulting in unclean open water, and if the contaminated open water is used all the time, it may damage the closed water plate heat exchanger 32, thereby reducing the service life of the closed water plate heat exchanger 32. So this embodiment has still set up blowoff valve 51, and this blowoff valve 51 can set up on the female pipe A of outside open water supply, also can set up on the female pipe B of outside open water return to will discharge through the open water that pollutes, with the purity of guaranteeing open water, avoid causing pollution or injury to closed water plate heat exchanger 32.
In some embodiments of the present invention, as shown in fig. 1, the water cooling cabinet 11 includes a water cooling cabinet plate heat exchanger 111 and at least one water cooling cabinet circulating water pump 112, the water cooling cabinet circulating water pump 112 is used for controlling the circulation of the internal cooling water between the water cooling cabinet 11 and the power unit water cooling plates 2, and the water cooling cabinet plate heat exchanger 111 is used for performing heat exchange with the closed cooling water supply subsystem 30.
Specifically, as shown in fig. 1, the water cooling cabinet 11 in the pure water cooling subsystem 10 includes a water cooling cabinet plate heat exchanger 111 and two water cooling cabinet circulating water pumps 112, wherein the water cooling cabinet plate heat exchanger 111 is connected with the closed cooling water supply subsystem 30, the closed cooling water supply subsystem 30 passes through the water cooling cabinet plate heat exchanger 111 with closed cooling water to accomplish cooling the internal cooling water, and then the water cooling cabinet circulating water pumps 112 can drive the cooled internal cooling water to flow, so that the pure water cooling subsystem 10 can cool the power unit water cooling plate 2. The water cooling cabinet circulating water pumps 112 in this embodiment may include a plurality of water cooling cabinet circulating water pumps 112 to improve the fault tolerance of the pure water cooling subsystem 10, and further improve the service life of the cooling system, and of course, a plurality of water cooling cabinet circulating water pumps 112 may also work simultaneously to improve the cooling efficiency.
In this embodiment, the water cooling cabinet 11 includes a plurality of water cooling cabinet circulating water pumps 112, the plurality of water cooling cabinet circulating water pumps 112 are connected in parallel, and at least one water cooling cabinet circulating water pump 112 is in an operating state when the cooling system 1 is in operation.
Specifically, as shown in fig. 1, the water cooling cabinet 11 of the embodiment of the present invention includes two water cooling cabinet circulating water pumps 112, and a plurality of water cooling cabinet circulating water pumps 112 are connected in parallel, wherein a water inlet of the water cooling cabinet circulating water pump 112 may be connected to a water outlet of the power unit water cooling plate 2, and a water outlet of the water cooling cabinet circulating water pump 112 may be connected to an internal cooling water inlet 1112 of the water cooling cabinet plate heat exchanger 111. More specifically, the water cooling cabinet circulating water pump 112 pumps the internal cooling water to the internal cooling water inlet 1112 of the water cooling cabinet plate heat exchanger 111, the external cooling water can cool the internal cooling water when the internal cooling water passes through the water cooling cabinet plate heat exchanger 111, and then the internal cooling water after cooling flows out from the internal cooling water outlet 1111 of the water cooling cabinet plate heat exchanger 111 and flows to the power unit water cooling plate 2 to cool the power unit water cooling plate 2, and then the internal cooling water returns to the water inlet of the water cooling cabinet circulating water pump 112.
In this embodiment, a check valve 35 is disposed at the water outlet of the water cooling cabinet circulating water pump 112, and an inlet filter screen 36 is disposed at the water inlet of the water cooling cabinet circulating water pump 112.
Specifically, as shown in fig. 1, a water inlet of the water cooling cabinet circulating water pump 112 is connected to a water outlet of the power unit water cooling plate 2, a water outlet of the water cooling cabinet circulating water pump 112 is connected to an internal cooling water inlet 1112 of the water cooling cabinet plate heat exchanger 111, and in this embodiment, a check valve 35 is disposed at the water outlet of the water cooling cabinet circulating water pump 112 to prevent the backflow of the closed water. And the water inlet of the water cooling cabinet circulating water pump 112 is provided with the inlet filter screen 36, and the inlet filter screen 36 can filter the internal cooling water entering the water cooling cabinet circulating water pump 112, so that the purity of the internal cooling water is improved, the later maintenance amount is reduced, and the cooling effect is improved.
It should be noted that, in the embodiment of the present invention, the two ends of the water cooling cabinet circulating water pump and the closed circulating cooling water pump may be further provided with a large and small opening, a coupler, a pair of wheels, and the like, so that the water cooling cabinet circulating water pump and the closed circulating cooling water pump can be used for maintaining the operation of the water pump, and are convenient for the post-maintenance operations such as cleaning and disassembling of the water pump.
To summarize, the cooling system of the feed pump converter of this embodiment includes the pure water cooling subsystem, air cooling subsystem and closed cooling water supply subsystem, wherein, closed water cooling supply subsystem utilizes outside open water to cool off its closed water in the system, will cool off the water in the pure water cooling subsystem through refrigerated closed water again, and cool off to the air in the air cooling subsystem, make the pure water cooling system can cool off the power unit in the converter, and the air cooling subsystem then can cool off the transformer in the converter. From this, the cooling system of feed pump converter in this embodiment can carry out more pertinent cooling to the converter to improve the cooling effect of converter, thereby improve the life of converter, reduce cooling system's running cost and occupation volume simultaneously.
FIG. 4 is a block diagram of a feed pump inverter according to an embodiment of the invention.
Further, as shown in fig. 4, the present invention proposes a feed-water pump frequency converter 100, and the feed-water pump frequency converter 100 includes the cooling system 1 of the above-mentioned embodiment.
According to the water-feeding pump frequency converter, the cooling system in the embodiment can be used for more pertinently cooling the frequency converter so as to improve the cooling effect of the frequency converter, so that the service life of the frequency converter is prolonged, and the operation cost and the occupied volume of the cooling system are reduced.
In addition, other structures and functions of the water-feeding pump frequency converter of the embodiment of the invention are known to those skilled in the art, and are not described herein for reducing redundancy.
In the description of the specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A cooling system of a feed pump frequency converter is characterized by comprising a pure water cooling subsystem, an air-water cooling subsystem and a closed cooling water supply subsystem;
the pure water cooling subsystem comprises a water cooling cabinet, an inner cooling water outlet and an inner cooling water inlet of the water cooling cabinet are respectively connected with a power unit water cooling plate of the frequency converter so as to cool the power unit through inner cooling water, and an outer cooling water outlet and an outer cooling water inlet of the water cooling cabinet are respectively connected with the closed cooling water supply subsystem so as to cool the inner cooling water through the closed cooling water supply subsystem;
the air-water cooling subsystem comprises an air-water cooling air cabinet and a cooling air channel, a fan is arranged in the cooling air channel, the fan blows air cooled by the air-water cooling air cabinet to the cooling air channel to be right, a transformer in the frequency converter is cooled, an external cooling water outlet and an external cooling water inlet of the air-water cooling air cabinet are respectively connected with the closed cooling water supply subsystem to be passed through the closed cooling water supply subsystem is right air in the cooling air channel is cooled.
2. The cooling system according to claim 1, wherein the closed cooling water supply subsystem comprises a closed water tank, at least one closed water plate heat exchanger and at least one closed circulation cooling water pump, the closed circulation cooling water pump is respectively connected with the closed water tank and the closed water plate heat exchanger and is used for pumping closed water in the closed water tank to a closed water inlet of the closed water plate heat exchanger, the closed water plate heat exchanger cools the closed water and conveys the cooled closed water to the water cooling cabinet and the air-water cooling air cabinet through a closed water outlet, an open water inlet of the closed water plate heat exchanger is connected with an external open water supply main pipe, and an open water outlet of the closed water plate heat exchanger is connected with an external open water return main pipe so as to cool the closed water passing through the closed water plate heat exchanger through the external open water.
3. The cooling system according to claim 2, wherein the closed cooling water supply subsystem comprises a plurality of closed circulation cooling water pumps and a plurality of closed water plate heat exchangers, the plurality of closed circulation cooling water pumps are connected in parallel, the number of the closed water plate heat exchangers is the same as that of the closed water circulation cooling water pumps, closed water inlets of the plurality of closed water plate heat exchangers are connected with water outlets of the plurality of closed circulation cooling water pumps in a one-to-one correspondence manner, and closed water outlets of the plurality of closed water plate heat exchangers are connected with the water cooling cabinet and the air-water cooling air cabinet.
4. The cooling system according to claim 3, wherein the closed water inlet, the closed water outlet, the open water inlet and the open water outlet of the closed water plate heat exchanger are provided with valves.
5. The cooling system as claimed in claim 3, wherein the water outlet of the closed circulation cooling water pump is provided with a check valve and the water inlet of the closed circulation cooling water pump is provided with an inlet strainer.
6. The cooling system according to any one of claims 2 to 5, wherein a blowoff valve is arranged in a connecting pipeline between the open water inlet of the closed water plate heat exchanger and the external open water supply main pipe, and/or a blowoff valve is arranged in a connecting pipeline between the open water outlet of the closed water plate heat exchanger and the external open water return main pipe, and the blowoff valve is used for discharging sewage in the connecting pipeline.
7. The cooling system of claim 1, wherein the water cooled cabinet includes a water cooled cabinet plate heat exchanger and at least one water cooled cabinet circulating water pump for controlling circulation of the internal cooling water between the water cooled cabinet and the power unit water cooled panels, the water cooled cabinet plate heat exchanger for exchanging heat with the closed cooling water supply subsystem.
8. The cooling system according to claim 7, wherein the water cooling cabinet comprises a plurality of water cooling cabinet circulating water pumps, the plurality of water cooling cabinet circulating water pumps are connected in parallel, and at least one of the water cooling cabinet circulating water pumps is in an operating state when the cooling system is in operation.
9. The cooling system according to claim 8, wherein a water outlet of the water cooling cabinet circulating water pump is provided with a check valve, and a water inlet of the water cooling cabinet circulating water pump is provided with an inlet filter screen.
10. A feed pump frequency converter, characterized in that it comprises a cooling system according to any of the preceding claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210788021.9A CN115163471A (en) | 2022-07-04 | 2022-07-04 | Cooling system of water-feeding pump frequency converter and water-feeding pump frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210788021.9A CN115163471A (en) | 2022-07-04 | 2022-07-04 | Cooling system of water-feeding pump frequency converter and water-feeding pump frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115163471A true CN115163471A (en) | 2022-10-11 |
Family
ID=83490793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210788021.9A Pending CN115163471A (en) | 2022-07-04 | 2022-07-04 | Cooling system of water-feeding pump frequency converter and water-feeding pump frequency converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115163471A (en) |
-
2022
- 2022-07-04 CN CN202210788021.9A patent/CN115163471A/en active Pending
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