CN116056415A - Water-cooled frequency converter cabinet and control method thereof - Google Patents
Water-cooled frequency converter cabinet and control method thereof Download PDFInfo
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- CN116056415A CN116056415A CN202211669163.XA CN202211669163A CN116056415A CN 116056415 A CN116056415 A CN 116056415A CN 202211669163 A CN202211669163 A CN 202211669163A CN 116056415 A CN116056415 A CN 116056415A
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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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
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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
- H05K7/20254—Cold plates transferring heat from heat source to coolant
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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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- Power Engineering (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The invention provides a water-cooling frequency converter cabinet and a control method thereof, wherein the water-cooling frequency converter cabinet comprises a cabinet body and a water-cooling system, a device to be cooled is arranged in the cabinet body, the device to be cooled comprises a module to be cooled and a cold plate, and the module to be cooled is arranged on the cold plate; the water cooling system comprises a shell, the shell is arranged in the cabinet body or outside the cabinet body, a heat exchanger is arranged in the shell, the first heat exchange side of the heat exchanger is communicated with external circulating water, and the second heat exchange side of the heat exchanger is communicated with a cold plate. The water cooling system adopts a frame structure, has high integration level, is convenient to install and form a cabinet, can be arranged in the frequency converter cabinet and can be arranged outside the frequency converter cabinet, and has good universality; the water cooling system can realize physical isolation with other devices in the frequency converter cabinet, so that 'water-electricity separation' is realized, and the safety is high; the water-cooled frequency converter cabinet can be suitable for high-power sections, and expansion of multiple power sections can be realized.
Description
Technical Field
The embodiment of the invention relates to the technical field of frequency converters, in particular to a water-cooling frequency converter cabinet and a control method thereof.
Background
Variable frequency speed regulation has been recognized as one of the most desirable and promising ways of speed regulation. The frequency converter is adopted to form a frequency conversion speed regulation transmission system, so that the labor productivity is improved, the product quality is improved, the equipment automation degree is improved, and the like; secondly, in order to save energy and reduce production cost.
With the rapid development of various industries, frequency converters are becoming more and more widely used. And the application requirements of high-power frequency converters are also becoming vigorous, and the application requirements of frequency converters of hundreds of KW and even MW level are also increasing. The heat generated by the high-power frequency converter is not small, and the application scene often has higher requirements on space and noise. Therefore, the conventional air-cooled heat dissipation has hardly satisfied the use requirements, and a water-cooled frequency converter has been developed. However, the water-cooled frequency converter needs to be provided with a water cooling system, which often accompanies the problems of excessively complex water cooling system, high cost, scattered devices distributed in the frequency converter cabinet, low integration level, complex cabinet formation, or 'water and electricity not separated', potential safety hazard, condensation risk and the like.
Disclosure of Invention
The embodiment of the invention aims to provide a water-cooled frequency converter cabinet and a control method thereof, which aim to solve the problems of a water cooling system used by the existing water-cooled frequency converter.
In order to solve the above technical problems, an embodiment of the present invention provides a water-cooled inverter cabinet, including:
the cabinet body is internally provided with a device to be cooled by water, the device to be cooled by water comprises a module to be cooled by water and a cold plate, and the module to be cooled by water is arranged on the cold plate; the method comprises the steps of,
the water cooling system comprises a shell, wherein the shell is arranged in the cabinet body or outside the cabinet body, a heat exchanger is arranged in the shell, the first heat exchange side of the heat exchanger is communicated with external circulating water, and the second heat exchange side of the heat exchanger is communicated with the cold plate.
The water cooling system adopts a frame structure, has high integration level, is convenient to install and form a cabinet, can be arranged in the frequency converter cabinet and can be arranged outside the frequency converter cabinet, and has good universality; the water cooling system can realize physical isolation with other devices in the frequency converter cabinet, so that 'water-electricity separation' is realized, and the safety is high; the water-cooled frequency converter cabinet can be suitable for high-power sections, and expansion of multiple power sections can be realized.
Preferably, in the water-cooled inverter cabinet, the cabinet body comprises a side door plate, the shell is arranged in the cabinet body, the shell is provided with an opening towards the side door plate, the side door plate is covered by the opening of the shell, the first heat exchange side of the heat exchanger is provided with an outer circulating water outlet and an outer circulating water inlet, and the outer circulating water outlet and the outer circulating water inlet penetrate through the side door plate from the opening of the shell and extend out of the cabinet body.
Preferably, in the water-cooled inverter cabinet, the external circulating water outlet and the external circulating water inlet are arranged at an upper-lower interval, one of the external circulating water outlet and the external circulating water inlet positioned above is arranged upwards, and the other of the external circulating water outlet and the external circulating water inlet is arranged downwards.
Preferably, in the water-cooled inverter cabinet, the external circulating water outlet, the external circulating water inlet and the heat exchanger are all wrapped with heat insulation cotton.
Preferably, in the water-cooled inverter cabinet, the water-cooled system is provided with a liquid filling port, and the liquid filling port penetrates through the side door plate from the opening of the shell to extend out of the cabinet body.
Preferably, in the water-cooled inverter cabinet, a liquid level display facing the opening of the shell is arranged in the shell, and a liquid viewing window is arranged on the side door plate corresponding to the liquid level display.
Preferably, in the water-cooled frequency converter cabinet, a bottom bracket is arranged at the bottom of the shell, and a waist round hole is arranged on the bottom bracket.
Preferably, in the water-cooled inverter cabinet, a threading hole is formed in the bottom of the shell.
Preferably, in the water-cooled inverter cabinet, a water accumulation drain outlet is formed in the bottom of the shell.
Preferably, in the water-cooled inverter cabinet, a fixing hanger is arranged at the top of the shell.
Preferably, in the water-cooled inverter cabinet, a temperature detection sensor is provided on the cold plate.
Preferably, in the water-cooled inverter cabinet, the temperature detection sensors are arranged at the cooling working medium inlet of the cold plate, the cooling working medium outlet of the cold plate and the middle part of the cold plate.
Preferably, in the water-cooled frequency converter cabinet, the device to be cooled by water comprises a rectifying assembly and an inversion assembly, wherein the rectifying assembly comprises a rectifying power module and a rectifying cold plate, and the inversion assembly comprises an inversion power module and an inversion cold plate.
Preferably, in the water-cooled inverter cabinet, the housing is disposed in the cabinet body, and the rectifying cold plate is connected in series with the inversion cold plate.
Preferably, in the water-cooled inverter cabinet, the rectifying component and the inverting component are located on the same side of the shell, the inverting component is located below the rectifying component, the shell comprises a front plate facing the rectifying component, the rectifying cold plate is communicated with the second heat exchange side of the heat exchanger through a rectifying component connecting pipe penetrating through the top of the front plate, and the inverting cold plate is communicated with the second heat exchange side of the heat exchanger through an inverting component connecting pipe penetrating through the bottom of the front plate.
Preferably, in the water-cooled inverter cabinet, the second heat exchange side of the heat exchanger is provided with a control pipeline, the control pipeline comprises a three-way valve, a water pump, a water tank and an evacuation valve, the first end and the second end of the three-way valve are respectively communicated with the first interface of the second heat exchange side of the heat exchanger and the first end of the water pump, the third end of the three-way valve is communicated with the second interface of the second heat exchange side of the heat exchanger and the first end of the evacuation valve, the second end of the evacuation valve is communicated with the inversion cold plate, and the first end and the second end of the water tank are respectively communicated with the second end of the water pump and the rectification cold plate.
Preferably, in the water-cooled frequency converter cabinet, the cabinet body comprises a cabinet door, an air inlet is formed in the bottom of the cabinet door, an air outlet is formed in the top of the cabinet body, a cabinet top fan is arranged at the air outlet, and an air-cooling heat dissipation device facing the air outlet is arranged in the cabinet body.
Preferably, in the water-cooled frequency converter cabinet, the heat dissipation device to be air-cooled comprises a capacitor assembly and a reactor.
Preferably, in the water-cooled frequency converter cabinet, a filtering ventilator is arranged at the air inlet.
Preferably, in the water-cooled inverter cabinet, a filtering ventilator is arranged at the air outlet.
In order to achieve the above object, the present invention further provides a control method of the water-cooled inverter cabinet, including:
after the water cooling system runs for a first preset time, controlling the starting of the device to be cooled;
and after the device to be cooled is stopped for a second preset time, controlling the water cooling system to stop running.
Drawings
One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated.
Fig. 1 is a schematic structural diagram of a water-cooled inverter cabinet according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the water-cooled inverter cabinet of FIG. 1 at another view angle;
FIG. 3 is a schematic diagram of the internal structure of the water-cooled inverter cabinet of FIG. 1;
FIG. 4 is a schematic diagram of the water cooling system of FIG. 3;
FIG. 5 is a schematic diagram of the water cooling system of FIG. 4 in another view;
FIG. 6 is a schematic diagram of the rectifying assembly of FIG. 3;
FIG. 7 is a schematic diagram of the inverter assembly of FIG. 3;
FIG. 8 is a schematic flow chart of the water cooling system in FIG. 3.
The invention is described by reference numerals:
| reference numerals | Name of the name | Reference numerals | Name of the |
| 1 | |
712 | |
| 2 | Cabinet |
713 | |
| 3 | |
714 | Fixed |
| 4 | |
715 | Three- |
| 5 | |
716 | |
| 6 | |
717 | |
| 7 | |
718 | |
| 701 | |
8 | Rectifying |
| 702 | |
801 | Rectifying |
| 703 | |
802 | Rectifying |
| 704 | External |
803 | |
| 705 | |
804 | |
| 706 | External |
9 | |
| 707 | Water accumulation and |
901 | |
| 708 | Rectifying |
902 | Inversion |
| 709 | Inverter |
10 | |
| 710 | |
11 | Reactor with a |
| 711 | Side plate |
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
Because the heat productivity of the high-power frequency converter, rectifying and inverting power modules is great, the air cooling heat dissipation is difficult to meet the requirements, and the water cooling frequency converter is applied. In the conventional design, there are many: 1) The water cooling system is distributed in the frequency converter cabinet in the form of scattered parts, so that the integration level is low and the cabinet is complex; 2) The water cooling system does not perform 'water-electricity separation' in the frequency converter cabinet, and if the water cooling system leaks, potential safety hazards exist; 3) The water-cooled frequency converter is easy to generate condensation, and in the prior art, a mode of configuring a heater in a frequency converter cabinet is mostly adopted, so that the problems of high cost, complex control and the like exist.
In view of the foregoing, the present invention provides a water-cooled inverter cabinet, and fig. 1 to 8 illustrate a preferred embodiment of the water-cooled inverter cabinet provided by the present invention. Referring to fig. 1 to 3, in the present embodiment, the water-cooled inverter cabinet includes a cabinet body and a water cooling system 7.
Referring to fig. 3, 6 and 7, a device to be cooled is disposed in the cabinet body, and the device to be cooled includes a module to be cooled and a cold plate, and the module to be cooled is disposed on the cold plate.
Specifically, the main heating devices in the frequency conversion cabinet are as follows: rectifying power module 801, capacitor assembly 10, inverter power module 901, reactor 11, circuit breaker, copper bar, etc. The heat generation of the rectifying power module 801 and the inverting power module 901 can generally reach several kilowatts to several tens of kilowatts, and the heat generation of the capacitor assembly 10, the reactor 11, and the like can generally reach several hundred to up to kilowatts.
Because the heat generated by the rectifying power module 801 and the inverting power module 901 is very large, the ordinary air cooling heat dissipation is difficult to meet the requirements, so the heat dissipation is performed by adopting a water cooling heat dissipation mode. Alternatively, referring to fig. 3, 6 and 7, in the present embodiment, the device to be water cooled includes a rectifying assembly 8 and an inverter assembly 9, the rectifying assembly 8 includes a rectifying power module 801 and a rectifying cold plate 802, and the inverter assembly 9 includes an inverter power module 901 and an inverter cold plate 902. The following description will take an example in which the device to be water-cooled includes the rectifying component 8 and the inverting component 9.
The heat productivity of the devices such as the capacitor assembly 10 and the reactor 11 is relatively small, and the air cooling heat dissipation can meet the requirements, so that the heat dissipation of the devices adopts an air cooling mode, and the realization is convenient and the cost is low. Optionally, referring to fig. 1 to 3, in this embodiment, the cabinet body includes a cabinet door, an air inlet 1 is provided at the bottom of the cabinet door, an air outlet 3 is provided at the top of the cabinet body, a top fan 2 is provided at the air outlet 3, and a heat dissipation device to be cooled facing the air outlet 3 is provided in the cabinet body.
Specifically, wait forced air cooling heat abstractor includes capacitor assembly 10, reactor 11, and the internal good wind channel that forms of cabinet, air intake 1 are located the cabinet door, and cabinet top fan 2 is the exchange centrifugal fan generally, has characteristics such as get electric convenience, amount of wind pressure are big.
Referring to fig. 1 to 3, the cabinet body generally includes two opposite cabinet doors, two side door boards 4 and a back board 6, the cabinet doors are opposite to the back board 6 at intervals, the two side door boards 4 are opposite to each other at intervals, each cabinet door is connected to the back board 6 through one side door board 4, the spacing direction between the cabinet door and the back board 6 is defined as front and rear directions below, the cabinet door is located in front of the back board 6, and the spacing direction between the two side door boards 4 is left and right directions. Two cabinet doors can be left and right side by side, and the bottom of every cabinet door all is provided with air intake 1, and air intake 1 on the left side cabinet door aligns with electric reactor 11 front and back, and air intake 1 on the right side cabinet door is located capacitor assembly 10's below, and cabinet top fan 2 is located the cabinet top, realizes airing exhaust. The air duct has the advantages that: 1) The air inlet 1 is aligned with a device with large heat productivity, so that the heat dissipation effect is good; 2) The air channel formed by the air inlet 1 and the air outlet 3 penetrates through the whole cabinet body, and devices in the cabinet can be radiated.
Optionally, in this embodiment, a filter ventilator is provided at the air intake 1.
Optionally, in the present embodiment, a filtering ventilator is provided at the air outlet 3
Specifically, the air inlet 1 and the air outlet 3 adopt filter ventilators, and different protection grade requirements of the cabinet body, such as IP 20-IP 55, can be met by adopting filter ventilators with different structures.
Referring to fig. 3, 4 and 8, the water cooling system 7 includes a housing, the housing is disposed in the cabinet or outside the cabinet, a heat exchanger 718 is disposed in the housing, a first heat exchange side of the heat exchanger 718 is connected to the external circulating water, and a second heat exchange side of the heat exchanger 718 is connected to the cold plate.
Specifically, the water cooling system 7 adopts a frame structure, has high integration level, can be arranged in the frequency converter cabinet and can be arranged outside the frequency converter cabinet, the universality is good, and the water cooling system 7 is arranged in the frequency converter cabinet for example, namely, the shell of the water cooling system 7 is arranged in the cabinet.
The second heat exchange side of the heat exchanger 718 is communicated with the cold plate, and the rectification cold plate 802 in the rectification component 8 and the inversion cold plate 902 in the inversion component 9 can be connected in parallel and then communicated with the second heat exchange side of the heat exchanger 718; the rectifying cold plates 802 in the rectifying assembly 8 and the inverting cold plates 902 in the inverting assembly 9 may be connected in series before being connected to the second heat exchanging side of the heat exchanger 718. The rectification cold plate 802 and the inversion cold plate 902 are connected in series for example.
Referring to fig. 8, cooling working mediums in a pipeline sequentially flow through an inversion cold plate 902 and a rectification cold plate 802 to take away heat productivity of the inversion power module 901 and the rectification power module 801, the warmed cooling working mediums continue to flow through a heat exchanger 718, heat is transferred to external circulating water through the heat exchanger 718 and then cooled, and then the cooling working mediums circularly flow through the inversion power module 901 and the rectification power module 801, so that the cycle is repeated.
Optionally, referring to fig. 4 and 5, in this embodiment, a bottom bracket 710 is disposed at the bottom of the housing, a waist hole is disposed on the bottom bracket 710, two bottom brackets 710 extending in the front-rear direction are disposed at left-right intervals at the bottom of the housing, the design of the bottom bracket 710 is convenient for fork lift truck to fork, and the bottom bracket 710 is provided with the waist hole for convenient transportation and fixing.
Optionally, referring to fig. 4 and 5, in this embodiment, a fixing hanger 714 is provided on the top of the housing, and the fixing hanger 714 is provided to facilitate fixing the water cooling system 7.
Optionally, referring to fig. 3 to 5, in the present embodiment, the cabinet body includes a side door plate 4, a housing is disposed in the cabinet body, the housing is provided with an opening facing the side door plate 4, the side door plate 4 covers the opening of the housing, the first heat exchange side of the heat exchanger 718 is provided with an external circulating water outlet 704 and an external circulating water inlet 706, and the external circulating water outlet 704 and the external circulating water inlet 706 both extend out of the cabinet body from the opening of the housing through the side door plate 4.
Specifically, the orientation of the opening of casing is right, and the casing still includes curb plate 711 and front board 712 towards the side door board 4 of right side, and curb plate 711 is left and right opposite with the opening of casing, and front board 712 is forward, and rectifying component 8 and contravariant subassembly 9 all are located the front of front board 712, have so realized that water cooling system 7 and other devices's in the converter cabinet physical isolation, have realized "water and electricity separation", and the security is high.
Alternatively, referring to fig. 1, 2 and 4, in the present embodiment, the water cooling system 7 is provided with a filling port 701, and the filling port 701 extends out of the cabinet body from the opening of the housing through the side door panel 4. The liquid adding port 701, the external circulating water outlet 704 and the external circulating water inlet 706 of the water cooling system 7 are all exposed to the right side of the frequency converter cabinet, so that liquid and pipeline connection can be realized without disassembling the side door plate 4 of the frequency converter cabinet or opening a door, and the operation is convenient.
Alternatively, referring to fig. 1, 2 and 4, in the present embodiment, the outer circulating water outlet 704 and the outer circulating water inlet 706 are disposed at an upper and a lower interval, and one of the outer circulating water outlet 704 and the outer circulating water inlet 706 is disposed upward and one of the outer circulating water outlet and the outer circulating water inlet 706 is disposed downward.
Specifically, the outer circulation water outlet 704 may be located above and disposed upward, and the outer circulation water inlet 706 may be located below and disposed downward; alternatively, the outer circulation water outlet 704 may be located downward and the outer circulation water inlet 706 may be located upward and downward.
For example, referring to fig. 1, 2 and 4, in the present embodiment, the outer circulation water outlet 704 is located directly above the outer circulation water inlet 706, the outer circulation water outlet 704 is disposed upward, and the outer circulation water inlet 706 is disposed downward. The pipelines of the external circulating water outlet 704 and the external circulating water inlet 706 are respectively upward and downward, so that on-site pipeline connection is facilitated, space is saved, and cabinet combining requirements of the frequency converter cabinet are facilitated.
Optionally, in this embodiment, the outer circulating water outlet 704, the outer circulating water inlet 706 and the heat exchanger 718 are all wrapped with insulation cotton, so that the risk of condensation can be reduced.
Optionally, referring to fig. 1, 2 and 4, in the present embodiment, a liquid level display 702 facing the opening of the casing is disposed in the casing, and a liquid viewing window 5 is disposed on the side door panel 4 corresponding to the liquid level display 702. The liquid level display 702 can display the liquid level in the water tank of the water cooling system 7, and the side door plate 4 of the frequency converter cabinet is provided with the liquid viewing window 5, and the liquid viewing window 5 can be a transparent organic glass panel or the like, so that the liquid level can be intuitively and conveniently observed.
Optionally, referring to fig. 4, in this embodiment, a water accumulation drain outlet 707 is provided at the bottom of the housing, where the water accumulation drain outlet 707 may be in a form of a quick connector and a hose, and the hose is led out of the frequency converter cabinet, so that water can be quickly and conveniently drained, and no water accumulation is generated in the frequency converter cabinet, which is safe and reliable.
Alternatively, referring to fig. 5, in the present embodiment, a threading hole 713 is provided at the bottom of the housing. The arrangement of the threading holes 713 facilitates the connection of the wiring in the water cooling system 7 with the related devices in the inverter cabinet. The threading hole 713 is arranged at the bottom of the side plate 711, a frequency converter control box is usually arranged in the frequency converter cabinet, the frequency converter control box can control the operation of the frequency converter cabinet, and the wiring in the water cooling system 7 and the frequency converter control box can control the operation of the water cooling system 7.
Alternatively, referring to fig. 4, 6 and 7, in the present embodiment, the rectifying component 8 and the inverting component 9 are located on the same side of the housing, the inverting component 9 is located below the rectifying component 8, the housing includes a front plate 712 facing the rectifying component 8, the rectifying cold plate 802 communicates with the second heat exchanging side of the heat exchanger 718 through a rectifying component connecting pipe 708 passing through the top of the front plate 712, and the inverting cold plate 902 communicates with the second heat exchanging side of the heat exchanger 718 through an inverting component connecting pipe 709 passing through the bottom of the front plate 712.
Specifically, the rectifying module 8 and the inverter module 9 are located on the front side of the housing, the rectifying power module 801 is disposed on the front plate surface of the rectifying cold plate 802, the inverter power module 901 is disposed on the front plate surface of the inverter cold plate 902, and the rear plate surfaces of the rectifying cold plate 802 and the inverter cold plate 902 face the front plate 712 of the water cooling system 7.
The converter cabinets with different powers can be expanded through the increase and decrease of the power modules such as the rectifying power module 801, the inverting power module 901 and the like and the selection of different current specifications, for example, the requirements of the 400-630 KW converter cabinet can be met.
The cooling medium inlets and outlets of the rectification cold plate 802 and the inversion cold plate 902 are respectively provided with a cold plate connector 803, and the cold plate connectors 803 can be locked on the cold plates by welding or thread sealing. The cold plate connector 803 is connected with the rectifying component connecting pipe 708 or the inverting component connecting pipe 709, so that the operation is simple, the tightness is good, and the circulating flow of the water cooling system 7 is realized.
Alternatively, referring to fig. 6 and 7, in the present embodiment, a temperature detection sensor 804 is provided on the cold plate. The temperature of the rectifying assembly 8 and the inverting assembly 9 can be detected in real time by the temperature detection sensor 804.
Further, referring to fig. 6 and 7, in the present embodiment, temperature detecting sensors 804 are disposed at the cooling medium inlet of the cold plate, the cooling medium outlet of the cold plate, and the middle of the cold plate.
Specifically, it is generally recommended that 3 temperature detection sensors 804 be disposed on each of the rectifying cold plates 802 and the inverter cold plates 902. The arrangement positions are recommended to be the cooling medium inlet, the cooling medium outlet and the position close to the middle module, so that the lowest temperature and the highest temperature on the cold plate can be measured.
The water cooling system 7 adopts a frame structure, has high integration level, is convenient to install and form a cabinet, can be arranged in the frequency converter cabinet and can be arranged outside the frequency converter cabinet, and has good universality; the water cooling system 7 can realize physical isolation with other devices in the frequency converter cabinet, so that 'water-electricity separation' is realized, and the safety is high; the water-cooled frequency converter cabinet can be suitable for high-power sections, and expansion of multiple power sections can be realized.
Optionally, referring to fig. 8, in the present embodiment, the second heat exchange side of the heat exchanger 718 is provided with a control pipeline, the control pipeline includes a three-way valve 715, a water pump 716, a water tank (a liquid level switch 703 is usually disposed on the water tank) and an exhaust valve 717, the first end and the second end of the three-way valve 715 are respectively connected to a first interface of the second heat exchange side of the heat exchanger 718 and a first end of the water pump 716, the third end of the three-way valve 715 is respectively connected to a second interface of the second heat exchange side of the heat exchanger 718 and a first end of the exhaust valve 717, the second end of the exhaust valve 717 is respectively connected to the inverter cold plate 902, and the first end and the second end of the water tank are respectively connected to a second end of the water pump 716 and the rectifier cold plate 802.
Specifically, temperatures on the rectifying cold plate 802 and the inverting cold plate 902 are collected in real time by the temperature detection sensor 804, and the highest temperature Tmax and the lowest temperature Tmin of the cold plates are judged and output by the inverter control box. Recommendation: when Tmin is less than or equal to 40 ℃, the flow direction of the three-way valve 715 in the water cooling system 7 is controlled to be: the water-cooled working medium does not flow through the heat exchanger 718 to exchange heat and cool, and flows in the water tank, the pipeline and the cold plate, so that the process is repeated. When Tmin is more than or equal to 50 ℃, the flow direction of the three-way valve 715 in the water cooling system is controlled to be: the water-cooled working medium flows in the water tank, the pipeline, the heat exchanger 718 and the cold plate through heat exchange and cooling of the heat exchanger 718, and the process is repeated. And when the Tmax is controlled to be more than or equal to 65 ℃, the frequency converter cabinet reports an over-temperature fault and stops running.
Further, the drain valve 717 is provided to facilitate the drain in the case of water cooling system maintenance or the like.
Optionally, referring to fig. 4, in this embodiment, the water cooling system 7 is provided with a flow switch 705, detection signals of the liquid level switch 703 and the flow switch 705 are transmitted to a control box of the frequency converter, and when the liquid level is abnormal or the flow is abnormal, the frequency converter cabinet reports that the liquid level is low or the flow is low, and stops running.
The invention also provides a control method of the water-cooled frequency converter cabinet, and in the embodiment, the control method of the water-cooled frequency converter cabinet comprises the following steps:
step S110: and after the water cooling system 7 operates for a first preset time period, controlling the starting of the device to be cooled.
Specifically, when the water cooling system 7 is used for the first time or used again after being emptied, the cooling medium is filled up to the whole pipeline and the cold plate, and a certain time is required. In order to avoid insufficient heat dissipation of the power module due to underfill of the cooling medium, the control logic is defined as: after power-up, the water pump 716 in the water cooling system 7 preferably operates for a first preset time period (for example, the first preset time period is 60 s), and after the cooling working medium is full, the rectifying power module 801 and the inverting power module 901 load current to full load.
Step S120: and after the water cooling device stops running for a second preset time, controlling the water cooling system 7 to stop running.
Specifically, to avoid excessive temperatures of the rectifying power module 801 and the inverting power module 901 due to premature shut down of the water pump 716, the control logic is defined as: after the rectifying power module 801 and the inverting power module 901 stop working for a second preset time period (for example, the second preset time period is 60 s), the water pump 716 is stopped.
Condensation may occur when the temperatures of the pipeline, the rectifying cold plate 802, and the inverter cold plate 902 are lower than the dew point temperature, and in order to control the condensation, optionally, in this embodiment, the control method of the water-cooled inverter cabinet further includes: obtaining the highest temperature Tmax and the lowest temperature Tmin of the cold plate; if the lowest temperature Tmin is not higher than the first temperature threshold A, controlling the water cooling system 7 to operate in a first working mode; if the lowest temperature Tmin is not lower than the second temperature threshold B, controlling the water cooling system 7 to operate in a second working mode; and if the highest temperature Tmax is not lower than the third temperature threshold C, controlling the shutdown alarm of the water-cooled frequency converter cabinet.
Specifically, temperatures on the rectifying cold plate 802 and the inverting cold plate 902 are collected in real time by the temperature detection sensor 804, and the highest temperature Tmax and the lowest temperature Tmin are judged and output by the inverter control box. When Tmin is less than or equal to A, controlling the water cooling system 7 to operate in a first working mode, and controlling the circulation direction of the three-way valve 715 in the water cooling system 7 to be as follows: the water-cooled working medium does not flow through the heat exchanger 718 to exchange heat and cool, and flows in the water tank, the pipeline and the cold plate, so that the process is repeated. When Tmin is more than or equal to B, controlling the water cooling system 7 to operate in a second working mode, and controlling the circulation direction of the three-way valve 715 in the water cooling system to be as follows under the condition that the water cooling system 7 is in the second working mode: the water-cooled working medium flows in the water tank, the pipeline, the heat exchanger 718 and the cold plate through heat exchange and cooling of the heat exchanger 718, and the process is repeated. And when Tmax is more than or equal to C, the frequency converter cabinet reports an over-temperature fault and stops running. Wherein the first temperature threshold a may be 40 ℃, the second temperature threshold B may be 50 ℃, and the third temperature threshold C may be 65 ℃.
Optionally, in this embodiment, the control method of the water-cooled inverter cabinet further includes: if the liquid level of the water cooling system 7 is abnormal or the flow is abnormal, controlling the water cooling frequency converter cabinet to stop and alarm.
Specifically, the detection signals of the liquid level switch 703 and the flow switch 705 in the water cooling system 7 are transmitted to the control box of the frequency converter, and when the liquid level is abnormal or the flow is abnormal, the frequency converter cabinet reports that the liquid level is low or the flow is low, and the operation is stopped.
The beneficial effects of the invention are as follows: the water-cooling frequency converter cabinet is suitable for high-power sections, and can realize expansion of multiple power sections; the water cooling system is of an integrated frame type, has high integration level and is convenient to install and form a cabinet; a good air channel is formed in the water-cooled frequency converter cabinet, and heat dissipation of devices such as a capacitor and a reactor can be well solved; and a control method of the water-cooling frequency conversion cabinet is established, so that the temperature of the rectifying and inverting power module can be effectively controlled to be proper, and the condensation risk can be effectively reduced.
The foregoing description of the preferred embodiments of the present invention should not be construed as limiting the scope of the invention, but rather should be understood to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the following description and drawings or any application directly or indirectly to other relevant art(s).
Claims (10)
1. A water-cooled inverter cabinet, comprising:
the cabinet body is internally provided with a device to be cooled by water, the device to be cooled by water comprises a module to be cooled by water and a cold plate, and the module to be cooled by water is arranged on the cold plate; the method comprises the steps of,
the water cooling system comprises a shell, wherein the shell is arranged in the cabinet body or outside the cabinet body, a heat exchanger is arranged in the shell, the first heat exchange side of the heat exchanger is communicated with external circulating water, and the second heat exchange side of the heat exchanger is communicated with the cold plate.
2. The water-cooled inverter cabinet of claim 1, wherein the cabinet body comprises a side door panel, the housing is disposed in the cabinet body, the housing is provided with an opening facing the side door panel, the side door panel covers the opening of the housing, the first heat exchange side of the heat exchanger is provided with an outer circulating water outlet and an outer circulating water inlet, and the outer circulating water outlet and the outer circulating water inlet both extend out of the cabinet body from the opening of the housing through the side door panel.
3. The water-cooled inverter cabinet of claim 2, wherein the outer circulating water outlet and the outer circulating water inlet are arranged at an upper-lower interval, and the outer circulating water outlet and one of the outer circulating water inlets which is positioned above are arranged upwards and the other of the outer circulating water outlets which is positioned below is arranged downwards; and/or the number of the groups of groups,
the external circulating water outlet, the external circulating water inlet and the heat exchanger are all wrapped with heat preservation cotton; and/or the number of the groups of groups,
the water cooling system is provided with a liquid adding port, and the liquid adding port penetrates through the side door plate from the opening of the shell and extends out of the cabinet body; and/or the number of the groups of groups,
the liquid level display device is characterized in that a liquid level display facing the opening of the shell is arranged in the shell, and a liquid viewing window is arranged on the side door plate corresponding to the liquid level display device.
4. The water-cooled inverter cabinet of any of claims 1-3, wherein a bottom bracket is provided at a bottom of the housing, and a waist hole is provided on the bottom bracket; and/or the number of the groups of groups,
the bottom of the shell is provided with a threading hole; and/or the number of the groups of groups,
the bottom of the shell is provided with a water accumulation and drainage outlet; and/or the number of the groups of groups,
the top of the shell is provided with a fixed hanging lug; and/or the number of the groups of groups,
and a temperature detection sensor is arranged on the cold plate.
5. The water-cooled inverter cabinet of claim 4, wherein the temperature detection sensors are disposed at a cooling medium inlet of the cold plate, a cooling medium outlet of the cold plate, and a middle portion of the cold plate.
6. The water-cooled inverter cabinet of any of claims 1-3, wherein the device to be water-cooled comprises a rectifying assembly and an inverter assembly, the rectifying assembly comprising a rectifying power module and a rectifying cold plate, the inverter assembly comprising an inverter power module and an inverter cold plate.
7. The water-cooled inverter cabinet of claim 6, wherein the housing is disposed within the cabinet, the rectifying cold plate being in series with the inverter cold plate, wherein:
the rectifying assembly and the inversion assembly are positioned on the same side of the shell, the inversion assembly is positioned below the rectifying assembly, the shell comprises a front plate facing the rectifying assembly, the rectifying cold plate is communicated with the second heat exchange side of the heat exchanger through a rectifying assembly connecting pipe penetrating through the top of the front plate, and the inversion cold plate is communicated with the second heat exchange side of the heat exchanger through an inversion assembly connecting pipe penetrating through the bottom of the front plate; and/or the number of the groups of groups,
the second heat exchange side of heat exchanger is provided with control pipeline, control pipeline includes three-way valve, water pump, water tank and exhaust valve, three-way valve's first end, second end communicate respectively the first interface of the second heat exchange side of heat exchanger the first end of water pump, three-way valve's third end intercommunication the second interface of the second heat exchange side of heat exchanger the first end of exhaust valve, the second end intercommunication of exhaust valve the contravariant cold plate, water tank's first end, second end communicate respectively the second end of water pump the rectification cold plate.
8. A water cooled inverter cabinet as claimed in any one of claims 1 to 3 wherein the cabinet comprises a cabinet door, an air inlet is provided at the bottom of the cabinet door, an air outlet is provided at the top of the cabinet, a cabinet top fan is provided at the air outlet, and a heat sink to be cooled is provided in the cabinet towards the air outlet.
9. The water-cooled inverter cabinet of claim 8, wherein the heat sink to be air-cooled comprises a capacitor assembly, a reactor; and/or the number of the groups of groups,
a filtering ventilator is arranged at the air inlet; and/or the number of the groups of groups,
and a filtering ventilator is arranged at the air outlet.
10. A control method of a water-cooled inverter cabinet according to any one of claims 1 to 9, comprising:
after the water cooling system runs for a first preset time, controlling the starting of the device to be cooled;
and after the device to be cooled is stopped for a second preset time, controlling the water cooling system to stop running.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211669163.XA CN116056415A (en) | 2022-12-23 | 2022-12-23 | Water-cooled frequency converter cabinet and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211669163.XA CN116056415A (en) | 2022-12-23 | 2022-12-23 | Water-cooled frequency converter cabinet and control method thereof |
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| CN116056415A true CN116056415A (en) | 2023-05-02 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118298700A (en) * | 2024-05-13 | 2024-07-05 | 中国科学院空间应用工程与技术中心 | Become gravity science experiment cabinet |
| CN118434109A (en) * | 2024-07-05 | 2024-08-02 | 中船赛思亿(无锡)电气科技有限公司 | Frequency converter cooling system for ship shaft belt power generation |
-
2022
- 2022-12-23 CN CN202211669163.XA patent/CN116056415A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118298700A (en) * | 2024-05-13 | 2024-07-05 | 中国科学院空间应用工程与技术中心 | Become gravity science experiment cabinet |
| CN118434109A (en) * | 2024-07-05 | 2024-08-02 | 中船赛思亿(无锡)电气科技有限公司 | Frequency converter cooling system for ship shaft belt power generation |
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