CN110890829A - Internal circulation cooling system for traction converter and control method thereof - Google Patents
Internal circulation cooling system for traction converter and control method thereof Download PDFInfo
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- CN110890829A CN110890829A CN201811043527.7A CN201811043527A CN110890829A CN 110890829 A CN110890829 A CN 110890829A CN 201811043527 A CN201811043527 A CN 201811043527A CN 110890829 A CN110890829 A CN 110890829A
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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
- H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
- H05K7/20909—Forced ventilation, e.g. on heat dissipaters coupled to components
- H05K7/20918—Forced ventilation, e.g. on heat dissipaters coupled to components the components being isolated from air flow, e.g. hollow heat sinks, wind tunnels or funnels
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- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The invention provides an internal circulation cooling system for a traction converter, wherein each power device of the traction converter is arranged in a closed cabinet, the internal circulation cooling system comprises a heat exchanger, a fan and a ventilation pipeline system which are arranged in the cabinet, the fan extracts hot air in the cabinet, the hot air is cooled by the heat exchanger and then is sent into the ventilation pipeline system by the fan, the ventilation pipeline system comprises ventilation pipelines leading to each power device, each ventilation pipeline is provided with at least one pipeline outlet corresponding to each power device, and each pipeline outlet is provided with a spray head and an associated regulating valve for regulating the flow of the corresponding spray head.
Description
Technical Field
The invention relates to the field of physical instruments, in particular to an internal circulation cooling system for a traction converter and a control method thereof.
Background
The traction converter has high dustproof grade requirement, and power devices of the traction converter are all positioned in a closed space. In the working process, after the most important power devices such as the IGBT generate heat loss, the heat loss is taken away by an external circulation cooling system (air cooling and water cooling), so that the junction temperature of the power devices can be kept within an allowable range, and the normal work and reliability of the power devices are ensured. Besides the loss of power switching devices such as IGBT, other devices such as a capacitor, a low-inductance busbar, a PCB (printed circuit board) plug-in board and a resistor also generate heat loss in the working process, so that the internal temperature of the converter rises, and if the heat is not dissipated in time, the temperature of the internal devices is extremely high, so that the converter breaks down.
As shown in fig. 1, the principle of the air-cooled internal circulation system is as follows: arrange the fan of cabinet body inside for the inner loop provides wind pressure head and amount of wind, generally adopt axial fan, such fan characteristics are that the amount of wind is great, but the pressure head is less. Considering the spatial arrangement of other equipment in the cabinet, the air flow of the internal circulation is difficult to be organized properly, and the original internal circulation thermal design is seriously influenced by the change of the structure in the cabinet after the air flow is organized. The internal circulation characteristic causes the wind speed at some heat sources even most heat sources to be very low (1 m/s-2 m/s), and the air flow direction cannot play the role of heat dissipation to the maximum extent. In addition, the air cooled by the heat exchanger is heated by mixing with hot air during the flow before being sent to the vicinity of the heat source.
Therefore, the problems to be solved in the prior art are as follows:
1. the effective air quantity of the fan is improved;
2. increasing the wind speed near the heat source;
3. preventing the cooled air from being heated by ambient air before flowing to the heat source;
4. the size and the direction of the cooling air volume can be flexibly adjusted.
In order to solve the above problems, the present invention is directed to a cooling system capable of effectively supplying cooled air to the vicinity of a heat source and adjusting the magnitude and direction of the air flow, and a control method thereof.
Disclosure of Invention
The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.
According to one aspect of the invention, an internal circulation cooling system for a traction converter is provided, each power device of the traction converter is arranged in a closed cabinet, the internal circulation cooling system comprises a heat exchanger, a fan and a ventilation pipeline system which are arranged in the cabinet, the fan extracts hot air in the cabinet, the hot air is cooled by the heat exchanger and then is sent into the ventilation pipeline system by the fan, the ventilation pipeline system comprises ventilation pipelines leading to each power device, each ventilation pipeline is provided with at least one pipeline outlet at the position corresponding to each power device, and each pipeline outlet is provided with a spray head and an associated regulating valve so as to regulate the flow of the corresponding spray head.
Further, each spray head is connected to a respective pipe outlet by a direction-adjustable hose, through which each spray head is arranged with a specific convection direction with respect to a corresponding thermal power device, based on the heat dissipation characteristics of the corresponding power device to be dissipated.
Further, when the power device is a reactor, the hoses of the nozzles at the reactor are arranged such that the air ejected from the respective nozzles has a convection direction from bottom to top with respect to the reactor.
Further, when the power device is a PCB (printed circuit board), the hoses of the nozzles at the reactor are arranged to enable the air sprayed by the corresponding nozzles to have a convection direction which is vertically opposite to the surface of the circuit board relative to the PCB.
Further, each head includes a nozzle of an inverted cone shape.
Further, the cabinet body framework of the cabinet is composed of hollow steel pipes, and at least one part of ventilation pipelines of the ventilation pipeline system is composed of the steel pipes.
Further, a temperature sensor is provided at each power device to sense a temperature of the corresponding power device, the internal circulation cooling system further includes:
the controller is coupled to the temperature sensors to collect the temperature of each power device, and is coupled to the regulating valves of the spray heads, and the controller is configured to respond to the fact that the measured temperature of any power device is higher than the target temperature, and then the regulating valves of the corresponding spray heads of the power device are controlled to increase the opening degree until the measured temperature of the power device is lower than the target temperature.
Further, the controller is also coupled to the fan, and the controller is further configured to control the fan to increase the working frequency until the measured temperature of all the power devices is lower than the target temperature in response to the measured temperature of any one of the power devices being higher than the target temperature and the regulating valve of the corresponding spray head being already at the maximum opening degree.
Furthermore, a plurality of spray heads are arranged at each power device with the heat dissipation power exceeding a threshold value.
According to one aspect of the invention, a control method for an internal circulation cooling system of a traction converter is provided, each power device of the traction converter is arranged in a closed cabinet, the internal circulation cooling system comprises a heat exchanger, a fan and a ventilation pipeline system which are arranged in the cabinet, the ventilation pipeline system comprises a ventilation pipeline leading to each power device, each ventilation pipeline is provided with at least one pipeline outlet corresponding to each power device, each pipeline outlet is provided with a spray head and an associated regulating valve, and the control method comprises the following steps:
starting the fan and the heat exchanger to enable the fan to extract hot air in the cabinet, cool the hot air and send the cooled hot air into the ventilation pipeline system; and
and controlling the opening of the regulating valve of each spray head so as to regulate the flow of the corresponding spray head to radiate each power device.
Further, each spray head is connected to a corresponding pipeline outlet through a hose with adjustable direction, and the control method further comprises the following steps: and adjusting the hoses of the sprayers based on the heat dissipation characteristics of the sprayers corresponding to the power devices to be dissipated so as to set the convection directions of the sprayers relative to the corresponding heat power devices.
Further, when the power device is a reactor, the step of adjusting the hose of each nozzle comprises adjusting the hose of the nozzle at the reactor so that the air sprayed by the corresponding nozzle has a convection direction from bottom to top relative to the reactor.
Further, when the power device is a PCB, the step of adjusting the hoses of the sprayers comprises adjusting the hoses of the sprayers at the reactor to enable air sprayed by the corresponding sprayers to have a convection direction which is perpendicular to the surface of the PCB relative to the PCB.
Further, a temperature sensor is arranged at each power device to sense the temperature of the corresponding power device, and the controlling the opening degree of the regulating valve of each spray head comprises:
and in response to the measured temperature of any power device being higher than the target temperature, controlling the regulating valve of the corresponding spray head of the power device to increase the opening degree until the measured temperature of the power device is lower than the target temperature.
Further, the control method further includes:
and in response to the fact that the measured temperature of any power device is higher than the target temperature and the regulating valve corresponding to the spray head is in the maximum opening degree, controlling the fan to increase the working frequency until the measured temperatures of all the power devices are lower than the target temperature.
In order to improve the effective air quantity generated by a fan in an internal circulation system of the traction converter, the ventilation pipeline system is added in the internal circulation cooling system, the ventilation pipeline system can directly send the cooled air generated by the fan to the vicinity of a heat-generating power device, and the air circulated through the ventilation pipeline system is not directly contacted with the hot air in the cabinet any more, so that the heating by the hot air is avoided.
In order to improve the wind speed near the heat source, the invention reasonably sets the pipeline arrangement of the ventilation pipeline system, reduces the flow resistance of the cooled air when circulating in the ventilation pipeline system, and simultaneously, the pipeline outlet is arranged at the position of the ventilation pipeline corresponding to each power device, and the inverted cone-shaped spray head is arranged at the outlet, thereby increasing the wind speed of the cooling air sprayed by the spray head.
In order to effectively regulate the size and the direction of air volume, the pipeline outlet is connected with the spray head through the hose, the valve is additionally arranged between the hose and the pipeline outlet, the hose can be set to enable cooling air sprayed by the spray head to be sprayed out from specific directions of different power devices, and the air volume of the air sprayed by the spray head can be controlled by controlling the opening degree of the valve.
Drawings
The above features and advantages of the present disclosure will be better understood upon reading the detailed description of embodiments of the disclosure in conjunction with the following drawings. In the drawings, components are not necessarily drawn to scale, and components having similar relative characteristics or features may have the same or similar reference numerals.
FIG. 1 is a block diagram of an embodiment of the prior art;
FIG. 2 is a block diagram of one embodiment depicted in accordance with one aspect of the present invention;
FIG. 3 is a partial view of one embodiment according to one aspect of the present invention;
FIG. 4 is a flow chart of one embodiment according to another aspect of the present invention.
Reference numerals
200 internal circulation cooling system
201 machine cabinet
202 heat exchanger
203 blower
204 controller
210 ventilating duct
211 spray head
212 regulating valve
213 hose
1-n power device
400 control method
S410 to S422 steps
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. It is noted that the aspects described below in connection with the figures and the specific embodiments are only exemplary and should not be construed as imposing any limitation on the scope of the present invention.
According to one aspect of the invention, an internal circulation cooling system for a traction converter is provided.
In an embodiment, as shown in fig. 2, a plurality of power devices 1 to n are dispersedly disposed inside the closed cabinet 201, and the plurality of power devices 1 to n may have different sizes, different heat generating powers, and different safety set temperatures, and the safety set temperature may be an optimal safety temperature that the plurality of power devices 1 to n need to maintain during operation, or a maximum value of the safety temperature that the plurality of power devices need to maintain during operation.
The internal circulation cooling system 200 is required to ensure that the temperatures of the plurality of power devices 1 to n are always maintained below the safe set temperature. Therefore, the trend and arrangement of the ventilation ducts in the ventilation duct system 210 are reasonably set according to the positions of the power devices 1 to n in the cabinet. Preferably, a rounded curved section may be provided at a corner of the ventilation duct to reduce the flow resistance of the cooling air.
A heat exchanger 202 and a fan 203 are provided at an air inlet of the ventilation duct system 210, the heat exchanger 202 cools the hot air in the cabinet, and the fan 203 blows the air cooled by the heat exchanger 202 into the air inlet of the ventilation duct system 210. And flows to the respective power devices along with the ventilation duct.
In the internal circulation cooling system 200 provided with the ventilation duct system 210, almost 100% of the air cooled by the heat exchanger 202 can be sent to the plurality of power devices 1 to n, so that an axial flow fan with a large air volume does not need to be selected. Meanwhile, the purpose of controlling the air volume entering the inlet of the ventilation duct system 210 and thus the air volume flowing out of the duct outlet of each ventilation duct can be achieved by controlling the working frequency of the fan 203.
A pipeline outlet is arranged at the corresponding position of the ventilation pipeline and each power device in the plurality of power devices 1-n, each pipeline outlet is connected with a spray head 211, an adjusting valve 212 is arranged between the spray head 211 and the pipeline outlet corresponding to the spray head 211, and the aim of controlling the air quantity flowing out of the spray head 211 can be achieved by adjusting the valve opening degree of the adjusting valve 212.
It will be appreciated that each conduit outlet and its corresponding spray head 211 may be connected by a threaded connection or rubber hose.
Furthermore, as shown in fig. 3, each spray head 211 and the corresponding pipe outlet can be connected by a direction-adjustable hose 213, and the spray direction of each spray head 211 can be changed by the hoses 213. Therefore, the orientation of the spray head 211 can be set according to the characteristics of the power device corresponding to each spray head 211, so that the purpose of setting a specific air convection direction according to the heat generating characteristics of each power device and the structural structure of the device is achieved, and the heat of each power device is reduced more efficiently.
Specifically, when the power device is a reactor, the reactor refers to a high-power inductor commonly used in the electronic field, and since the reactor is actually formed by winding a wire into a solenoid, and the middle of the reactor can be hollow or provided with an iron core, the nozzle 211 corresponding to the reactor is arranged from the bottom of the reactor to the upper part of the reactor, and the flow direction of the generated air is from bottom to top. It can be understood that, since the air inside the reactor is at a higher temperature than the air ejected from the corresponding nozzle 211, the hotter air inside the reactor is squeezed by the cooler air and flows more smoothly to the upper part of the reactor, and this characteristic is determined by the density of the cooler and cooler air. The cooler air flows through the reactor, can absorb the heat that the reactor produced, and the air temperature after having absorbed the heat rises simultaneously, flows up more easily to this can accelerate the inside air circulation of reactor, brings bigger air circulation rate.
Specifically, when the power device is a PCB, the current PCB is developing towards high integration, high density, high precision, fine pore diameter and fine wires, and thousands of electronic devices can be integrated on the PCB due to the high integration and high density of the PCB, and during operation, the electronic devices operate simultaneously, resulting in very high temperature on the surface of the PCB, while the electronic devices are fragile, especially very small electronic devices, and the bearable temperature of the electronic devices is lower, so that the nozzle 211 corresponding to the PCB needs to be set right against the surface of the PCB, so that the air sprayed from the nozzle has a convection direction which is perpendicular to the surface of the PCB relative to the PCB, thereby effectively reducing the temperature of the dense electronic devices distributed on the surface of the PCB.
Further, as shown in fig. 3, each of the nozzles 211 may include an inverted cone-shaped nozzle, and it can be understood that a certain flow of air is extruded through the inverted cone-shaped nozzle, so as to increase the flow rate of the air and more intensively spray the air to the corresponding power device.
Further, since the cabinet frame of the cabinet 201 is made of hollow steel pipes, the ventilation duct of the ventilation duct system 210 may be partially or entirely made of hollow steel pipes of the cabinet, thereby saving space and cost.
Further, the operating frequency of the fan 203 may be set by the ventilation volume required by all the power devices 1 to n. Since the heat dissipation powers required by the power devices 1 to n are different, an extreme value easily exists, that is, the heat dissipation power required by a certain power device is far greater than that of other heat dissipation power devices, and therefore, the operating frequency of the fan 203 needs to be adjusted to a higher level to meet the heat dissipation power required by the power device with the extremely high heat dissipation power, and meanwhile, energy is wasted for other power devices. Therefore, a threshold value of the heat dissipation power can be set based on the median value or mode value or average value of the heat dissipation power required by all the power devices, when the heat dissipation power required by a certain power device i is higher than the threshold value, a pipeline outlet can be additionally arranged at the position of the ventilation pipeline corresponding to the power device, and the specific additional number can be considered based on the heat dissipation power of the power device i. Therefore, the energy waste of the fan caused by the inconsistency of the heat dissipation power required by the power device is avoided.
The specific heat dissipation efficiency required by each power device can be calculated according to the temperature of each power device and the safety set temperature thereof. Accordingly, a temperature sensor may be disposed around the location of each power device to sense the temperature of the respective power device.
Preferably, the internal circulation cooling system 200 may further include a controller 204 for automatically controlling the operation of the internal circulation cooling system 200.
Further, the controller 204 may be coupled to temperature sensors disposed around all power devices and acquire the temperature of every other power device for use as a reference for controlling the internal circulation cooling system 200.
Further, each damper 212 in the internal circulation cooling system 200 may be an electronic damper, and the electronic dampers 212 are coupled to the controller 204 and controlled by the controller 204. The controller 204 can determine whether the power device has reached a suitable heat dissipation efficiency based on the temperature detected by the temperature sensor corresponding to each power device and the required safety setting temperature.
Further, a target temperature is generated based on the safety set temperature of each power device, and the controller 204 judges the power device to obtain the required heat dissipation power in response to that the temperature detected by the temperature sensor corresponding to the power device is lower than the target temperature; in response to that the temperature detected by the temperature sensor corresponding to the power device is higher than the target temperature, the controller 204 determines that the power device does not obtain the required heat dissipation power, and then controls the electronic adjusting valve 212 corresponding to the power device to increase the valve opening degree to increase the heat dissipation power of the power device until the temperature of the power device is reduced to the target temperature.
It is understood that the controller 204 may gradually increase the opening of the price-adjusting valve 212 based on the measured temperature of the power device when controlling the opening of the adjusting valve 212 corresponding to the power device; or, the opening degree of the regulating valve 212 is firstly opened to the maximum, and when the measured temperature of the power device is reduced to be lower than the target temperature, the opening degree of the regulating valve 212 is slowly regulated to a proper position.
Furthermore, the fan 203 may also be an electronic fan and coupled to the controller 204, and when the controller 204 opens the adjusting valve 212 corresponding to the power device to the maximum opening degree, and the measured temperature of the power device still does not reach below the target temperature within a certain time, the controller 204 may increase the operating frequency of the fan 203 to increase the air flow and the wind speed until the measured temperature of the power device is lower than the target temperature.
It can be understood that the above-mentioned regulating valve and fan can also be implemented by using a mechanical product which needs to be manually regulated, and in the experiment or test process, when the measured temperature of a certain power device is found to be higher, the heat dissipation power of the power device is improved by manually regulating the opening degree of the regulating valve and the working frequency of the fan.
According to another aspect of the invention, a control method for an internal circulation cooling system of a traction converter is provided.
In one embodiment, each power device of the traction converter is arranged in a closed cabinet, the internal circulation cooling system comprises a heat exchanger, a fan and a ventilation pipeline system which are arranged in the cabinet, the ventilation pipeline system comprises a ventilation pipeline leading to each power device, each ventilation pipeline is provided with at least one pipeline outlet corresponding to each power device, and each pipeline outlet is provided with a spray head and an associated regulating valve.
The control method 400 for controlling the internal circulation cooling system includes:
s410: starting a fan and a heat exchanger to enable the fan to extract hot air in the cabinet, cool the hot air and send the cooled hot air into the ventilation pipeline system by the fan; and
s420: and controlling the opening of the regulating valve of each spray head so as to regulate the flow of the corresponding spray head to radiate each power device.
In step S410, the heat exchanger obtains hot air in the cabinet for cooling, and the cooled air is blown into the air inlet of the ventilation duct system by the fan.
In step S420, the opening of the regulating valve may be manually regulated or regulated by an electric signal.
Further, each spray head is connected to its corresponding conduit outlet by a directionally adjustable hose, and therefore the control method 400 further includes:
s430: and adjusting the hose of each spray head based on the heat dissipation characteristics of the power device to be dissipated corresponding to each spray head so as to set the convection direction of each spray head relative to the corresponding power device to be dissipated.
Specifically, when the power device is a reactor, the hose corresponding to the nozzle of the reactor in step S430 may be adjusted to a state such that air ejected from the nozzle is blown toward the reactor from below to above, according to the structural structure and physical characteristics thereof and the heat dissipation characteristics. That is, the air ejected from the head has a convection direction from bottom to top with respect to the reactor.
Specifically, when the power device is a PCB circuit board, the hose corresponding to the nozzle of the PCB circuit board in step S430 may be adjusted to a state such that air ejected from the nozzle is vertically blown to the surface of the PCB circuit board, according to the characteristic that the surface thereof has highly integrated electronic devices. Namely, the air sprayed by the spray head corresponding to the PCB has a convection direction perpendicular to the PCB relative to the PCB.
Further, a temperature sensor is disposed at each power device to sense the temperature of the corresponding power device, and therefore, step S420 further includes:
s421: and in response to the measured temperature of any power device being higher than the target temperature, controlling the regulating valve of the corresponding spray head of the power device to increase the opening degree until the measured temperature of the power device is lower than the target temperature.
The target temperature may be a maximum value of a temperature range in which each power device safely operates, or may be an optimal temperature at which each power device operates.
The measured temperature refers to a temperature detected by a temperature sensor disposed around the power device.
Further, when the step S421 is not enough to reduce the measured temperature of the power device below the target temperature, the step S420 may further include the step S422:
and in response to the fact that the measured temperature of any power device is higher than the target temperature and the regulating valve corresponding to the spray head is in the maximum opening degree, controlling the fan to increase the working frequency of the fan until the measured temperatures of all the power devices are lower than the target temperature.
While, for purposes of simplicity of explanation, the methodologies are shown and described as a series of acts, it is to be understood and appreciated that the methodologies are not limited by the order of acts, as some acts may, in accordance with one or more embodiments, occur in different orders and/or concurrently with other acts from that shown and described herein or not shown and described herein, as would be understood by one skilled in the art.
The previous description of the disclosure is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other variations without departing from the spirit or scope of the disclosure. Thus, the disclosure is not intended to be limited to the examples and designs described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (15)
1. The internal circulation cooling system comprises a heat exchanger, a fan and a ventilation pipeline system which are arranged in a closed cabinet, wherein the fan extracts hot air in the cabinet, the hot air is cooled by the heat exchanger and then is sent into the ventilation pipeline system by the fan, the ventilation pipeline system comprises ventilation pipelines leading to the power devices, at least one pipeline outlet is arranged at the position of each ventilation pipeline corresponding to each power device, and each pipeline outlet is provided with a spray head and an associated regulating valve for regulating the flow of the corresponding spray head.
2. The internal circulation cooling system according to claim 1, wherein each shower head is connected to the corresponding duct outlet through a direction-adjustable hose, and each shower head is provided with a specific convection direction with respect to the corresponding thermal power device through the hose based on a heat dissipation characteristic of the corresponding power device to be dissipated.
3. The internal circulation cooling system according to claim 2, wherein when the power device is a reactor, the hoses of the heads at the reactor are arranged so that the air ejected from the respective heads has a direction of convection from bottom to top with respect to the reactor.
4. The internal circulation cooling system according to claim 2, wherein when the power device is a PCB, the hoses of the heads at the reactor are arranged so that the air ejected from the respective heads has a convection direction perpendicular to the surface of the circuit board with respect to the PCB.
5. The internal circulation cooling system of claim 1, wherein each spray head comprises an inverted cone shaped spray nozzle.
6. The internal circulation cooling system according to claim 1, wherein the cabinet frame of the cabinet is formed of a hollow steel pipe, and at least a part of the ventilation duct system is formed of the steel pipe.
7. The internal circulation cooling system according to claim 1, wherein a temperature sensor is provided at each power device to sense a temperature of the corresponding power device, the internal circulation cooling system further comprising:
the controller is coupled to the temperature sensors to collect the temperature of each power device, and is coupled to the regulating valves of the spray heads, and the controller is configured to respond to the fact that the measured temperature of any power device is higher than the target temperature, and then the regulating valves of the corresponding spray heads of the power device are controlled to increase the opening degree until the measured temperature of the power device is lower than the target temperature.
8. The internal circulation cooling system of claim 7, wherein the controller is further coupled to the fan, the controller further configured to control the fan to increase the operating frequency until the measured temperature of all power devices is below the target temperature in response to the measured temperature of any power device being above the target temperature and the regulating valve of the corresponding spray head having been at the maximum opening.
9. The internal circulation cooling system according to claim 1, wherein a plurality of spray heads are provided at each power device whose heat dissipation capacity exceeds a threshold value.
10. A control method for an internal circulation cooling system of a traction converter, wherein each power device of the traction converter is arranged in a closed cabinet, the internal circulation cooling system comprises a heat exchanger, a fan and a ventilation pipeline system which are arranged in the cabinet, the ventilation pipeline system comprises a ventilation pipeline leading to each power device, each ventilation pipeline is provided with at least one pipeline outlet corresponding to each power device, each pipeline outlet is provided with a spray head and an associated regulating valve, and the control method comprises the following steps:
starting the fan and the heat exchanger to enable the fan to extract hot air in the cabinet, cool the hot air and send the cooled hot air into the ventilation pipeline system; and
and controlling the opening of the regulating valve of each spray head so as to regulate the flow of the corresponding spray head to radiate each power device.
11. The control method of claim 10, wherein each spray head is connected to a respective conduit outlet by an adjustable direction hose, the control method further comprising: and adjusting the hoses of the sprayers based on the heat dissipation characteristics of the sprayers corresponding to the power devices to be dissipated so as to set the convection directions of the sprayers relative to the corresponding heat power devices.
12. The control method according to claim 11, wherein when the power device is a reactor, the step of adjusting the hose of each head includes adjusting the hose of the head at the reactor so that air ejected from the corresponding head has a convection direction from bottom to top with respect to the reactor.
13. The control method according to claim 11, wherein when the power device is a PCB, the step of adjusting the hoses of the respective heads includes adjusting the hoses of the heads at the reactor so that the air ejected from the respective heads has a convection direction perpendicular to a surface of the PCB with respect to the PCB.
14. The control method of claim 10, wherein a temperature sensor is provided at each power device to sense a temperature of the corresponding power device, and the controlling of the opening degree of the regulating valve of each head comprises:
and in response to the measured temperature of any power device being higher than the target temperature, controlling the regulating valve of the corresponding spray head of the power device to increase the opening degree until the measured temperature of the power device is lower than the target temperature.
15. The control method according to claim 14, further comprising:
and in response to the fact that the measured temperature of any power device is higher than the target temperature and the regulating valve corresponding to the spray head is in the maximum opening degree, controlling the fan to increase the working frequency until the measured temperatures of all the power devices are lower than the target temperature.
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| CN111722687A (en) * | 2020-06-29 | 2020-09-29 | 江苏邦宁科技有限公司 | Big data server |
| CN111725714A (en) * | 2020-07-09 | 2020-09-29 | 蔡利忠 | Dynamic adjustable shock absorption heat dissipation electric power cabinet |
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Application publication date: 20200317 |