CN113572367B - A medium frequency static variable power supply structure for low temperature environment - Google Patents
A medium frequency static variable power supply structure for low temperature environment Download PDFInfo
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- CN113572367B CN113572367B CN202110984775.7A CN202110984775A CN113572367B CN 113572367 B CN113572367 B CN 113572367B CN 202110984775 A CN202110984775 A CN 202110984775A CN 113572367 B CN113572367 B CN 113572367B
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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
- H02M5/00—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/10—Centrifugal pumps for compressing or evacuating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
-
- 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
- H05K7/14—Mounting supporting structure in casing or on frame or rack
- H05K7/1422—Printed circuit boards receptacles, e.g. stacked structures, electronic circuit modules or box like frames
- H05K7/1427—Housings
- H05K7/1432—Housings specially adapted for power drive units or power converters
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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
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Power Engineering (AREA)
- Control Of High-Frequency Heating Circuits (AREA)
Abstract
本发明公开了一种应用于低温环境的中频静变电源结构，包括控制柜主体，所述控制柜主体的上方内部安装有通风口，所述控制柜主体上方远离通风口的一侧内部安装有中频静变电源主体，通过增压机构的作用下，使得外界的空气进行增压，增压后的空气导入到第一容纳腔的内部，可以极大的改善第一容纳腔内部气压较低的现象，若是温度低于第一温度检测器的限定值时，这时在第一温度检测器的作用下使得第二加热器工作，对中频静变电源主体进行加热，若是温度达到第二温度检测器的限定值时，这时在第二温度检测器的作用下关闭第二加热器。
The present invention discloses a medium-frequency static variable power supply structure applied to a low-temperature environment, comprising a control cabinet main body, a vent is installed inside the upper part of the control cabinet main body, and the medium-frequency static variable power supply main body is installed inside the side of the upper part of the control cabinet main body away from the vent. Through the action of a pressurizing mechanism, the external air is pressurized, and the pressurized air is introduced into the interior of a first accommodating chamber, which can greatly improve the phenomenon of low air pressure inside the first accommodating chamber. If the temperature is lower than the limit value of a first temperature detector, the second heater is operated under the action of the first temperature detector to heat the medium-frequency static variable power supply main body. If the temperature reaches the limit value of the second temperature detector, the second heater is turned off under the action of the second temperature detector.
Description
Technical Field
The invention belongs to the technical field of scientific products, and particularly relates to a medium-frequency static-change power supply structure applied to a low-temperature environment.
Background
The medium frequency static power supply is a 400Hz static variable frequency power supply which is specially designed and manufactured for aviation and military electronic and electric equipment by adopting a high-frequency power electronic switch conversion technology, can be used for military electronic equipment such as airplanes and airborne equipment, radars, navigation and the like, and other occasions needing the 400Hz medium frequency power supply, and is a generation product of a unit type variable frequency power supply.
The prior intermediate frequency static power supply is in a relatively constant temperature and pressure environment by adding a high-pressure pump and a heating module, but before the pressure and the temperature are increased to constant temperature, a pressure sensor and a temperature sensor are required to be arranged at the same time to realize the change of the pressure and the heating state, and the two sensors are required to be configured in place and cannot give feedback when the sensors are in fault, so that a controller is also required to monitor the states of different types of sensors at the same time and respectively judge the states through different sensor signals.
Disclosure of Invention
The invention aims to solve the problems in the background technology, and provides an intermediate frequency static change power supply structure applied to a low-temperature environment, which can realize the detection of two parameter states by a sensor, can realize the identification of the abnormal working states of the sensor and a booster pump, saves the types of the sensor, and can improve the reliability and timeliness of data monitoring.
The medium-frequency static-change power supply structure applied to the low-temperature environment comprises a control cabinet main body, wherein a vent is arranged in the upper part of the control cabinet main body, a medium-frequency static-change power supply main body is arranged in one side, far away from the vent, of the upper part of the control cabinet main body, and a cabinet door is arranged below one side, close to the medium-frequency static-change power supply main body, of the control cabinet main body;
A first accommodating cavity is formed in the upper part inside the control cabinet main body, a second accommodating cavity is arranged below the first accommodating cavity, and a third accommodating cavity is arranged below the second accommodating cavity;
The first containing cavity is internally provided with a pressurizing mechanism at the axle center, the pressurizing mechanism is fixedly connected with the vent through an internal air inlet and adopts a connecting flange, the two sides of the pressurizing mechanism are provided with an automatic heating mechanism, the automatic heating mechanism consists of a cabinet body, two second heaters, a first temperature detector and a second temperature detector and a microcontroller, wherein the two outer walls of the cabinet body of the automatic heating mechanism are provided with four pressure guide through holes, the second heaters are two pi-shaped bodies arranged at the two inner sides of the cabinet body, the pi-shaped bodies consist of a vertical rubber material thin plate and two transverse air guide pipes, one end of each of the pi-shaped bodies is connected to one side of the rubber material thin plate, the three of the four air guide pipes penetrates through the inner wall of the cabinet body and is inserted into the pressure guide through hole, the remaining one air guide pipe is closed, the rubber material thin plate is in a hollow shape which is respectively closed, a metal area is adhered to the two adjacent sides of the two rubber material thin plates, a metal strip or a metal wire is arranged in the metal heating area, the first temperature detector and the second temperature detector are respectively connected with the two temperature detectors at the same temperature, the two temperature detectors are electrically connected with the microcontroller, the two temperature detectors are respectively, the two temperature detectors are electrically connected with the two temperature detectors are respectively, the two temperature detectors are respectively arranged at the same temperature detector structures, the temperature detector is different from the temperature detector is in the temperature detector, and the temperature detector is electrically connected with the microcontroller, the temperature detector is respectively, the temperature detector is electrically connected with the temperature detector is respectively, and the temperature detector is respectively and has the temperature detector is different from the temperature detector, four kinds of information are obtained through the output signals of the two temperature detectors and the change rates of the two output signals, wherein the four kinds of information comprise current temperature value detection, whether the temperature sensor is abnormal, pressure detection of the first accommodating cavity and whether the pressurizing mechanism is abnormal;
a plurality of wiring frames are arranged on one side of the inside of the second accommodating cavity, and first heaters are arranged on two sides of the inside of the second accommodating cavity.
The medium frequency static change power supply main body consists of a control key, an output frequency gear selection knob, an output voltage regulation knob, a three-phase switching display knob, a conversion button, a power factor indicator lamp, a kilowatt indicator lamp, a factor display window, a current display window, a voltage display window, a frequency display window and a connecting plate, wherein the control key is arranged at one end below the front side of the connecting plate, the output frequency gear selection knob is arranged at one side of the control key, the output frequency gear selection knob is arranged at one side of the output frequency gear selection knob, the output voltage regulation knob is arranged at one side of the output frequency regulation knob, which is far away from the output frequency gear selection knob, the three-phase switching display knob is arranged at the other side of the output voltage regulation knob, the conversion button is arranged at the other side of the three-phase switching display knob, the factor display window is arranged above the conversion button, the power factor indicator lamp is arranged above the factor display window, the kilowatt indicator lamp is arranged at one side of the power factor indicator lamp, the current display window is arranged at one side of the factor display window, the voltage display window is arranged at one side of the current display window, the other side of the frequency display window is arranged at one side of the current display window, which is arranged at one side of the other side of the frequency display window.
The second accommodating cavity and the third accommodating cavity are of hollow box-shaped structures, and the inner sides of the second accommodating cavity and the third accommodating cavity are provided with partition plates.
The control cabinet main part is inside hollow box structure, the inside a week indent of control cabinet main part has the heat preservation, the both sides below indent of control cabinet main part has the heat dissipation window.
The cabinet door is of a plate body structure, a hinge is arranged at the intersection of the cabinet door and one side of the control cabinet main body, a handle is arranged on one side, away from the hinge, of the cabinet door, and a safety lock is concavely arranged in the handle.
And a wiring hole is formed in the lower part of the third accommodating cavity.
And the factor display window, the current display window, the voltage display window and the frequency display window all adopt LED nixie tube structures.
The pressurizing mechanism is electrically connected with the power supply.
The supercharging mechanism consists of an impeller assembly, an air outlet, a volute, a fixing seat, a compressor and an air inlet, wherein the impeller assembly is arranged on one side of the volute, the fixing seat is arranged on the other side of the volute, the compressor is arranged on the other side of the fixing seat, the air inlet is arranged below the fixing seat, and the air outlet is arranged above one side, away from the air inlet, of the volute.
The intelligent air guide system has the beneficial effects that 1, through the special structure and the relative position design of the double temperature sensors and the heater and the asymmetric air guide structure design of the external air guide pipe, the detection of two parameter states per se is realized by only one sensor, the identification of the abnormal working states of the sensors and the booster pump can be realized, the types of the sensors are saved, and meanwhile, the reliability and the timeliness of data monitoring can be improved.
2. According to the invention, the pressurizing mechanism is arranged in the first accommodating cavity above the inside of the control cabinet main body, and the air inlet inside the pressurizing mechanism is connected with the ventilation opening, so that the air inlet can conduct air introduction under the action of the ventilation opening.
3. According to the invention, the outside air is pressurized under the action of the pressurizing mechanism, and the pressurized air is led into the first accommodating cavity, so that the phenomenon of low air pressure in the first accommodating cavity can be greatly improved, and the phenomenon of inconvenient work caused by low air pressure of the medium-frequency static change power supply main body in the first accommodating cavity can be avoided.
4. According to the invention, the control cabinet main body is divided into three major parts, namely the first accommodating cavity, the second accommodating cavity and the third accommodating cavity from top to bottom, the intermediate frequency static change power supply main body is arranged in the first accommodating cavity, the electric elements are arranged in the second accommodating cavity, and the wiring is arranged in the third accommodating cavity, so that the arrangement of all components is more regular, and no scattering phenomenon occurs.
5. According to the invention, the second heater is arranged in the first accommodating cavity and is electrically connected with the first temperature detector and the second temperature detector, the limiting values of the first temperature detector and the second temperature detector are different, if the temperature is lower than the limiting value of the first temperature detector, the second heater is enabled to work under the action of the first temperature detector, the medium-frequency static-change power supply main body is heated, and if the temperature reaches the limiting value of the second temperature detector, the second heater is turned off under the action of the second temperature detector, so that the phenomenon of damage caused by higher temperature is avoided.
6. According to the invention, the first heater is arranged in the second accommodating cavity, so that the phenomenon of moisture at the surface end of the electrical element in the second accommodating cavity can be avoided through the first heater, and the service life of the electrical element is effectively prolonged.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a medium frequency static change power supply applied to a low temperature environment;
FIG. 2 is a schematic diagram of the front side cross-sectional structure of the medium frequency static change power supply structure applied to the low temperature environment;
FIG. 3 shows an intermediate frequency stationary power supply according to the present invention a main body front view structure schematic diagram;
FIG. 4 is a schematic cross-sectional view of the self-heating mechanism of the present invention;
fig. 5 is a schematic front view of the supercharging mechanism of the present invention.
The heat dissipation window, the 2, the control cabinet main body, the 3, the medium frequency stationary power supply main body, the 16, the control key, the 17, the output frequency gear selection knob, the 18, the output frequency adjustment knob, the 19, the output voltage adjustment knob, the 20, the three-phase switching display knob, the 21, the conversion button, the 22, the power factor indicator lamp, the 23, the kilowatt indicator lamp, the 24, the factor display window, the 25, the current display window, the 26, the voltage display window, the 27, the frequency display window, the 28, the connecting plate, the 4, the cabinet door, the 5, the ventilation opening, the 6, the handle, the 7, the automatic heating mechanism, the 71, the cabinet body, the 72, the second heater, the 73, the first temperature detector, the 74, the second temperature detector, the 8, the pressurizing mechanism, the 81, the impeller assembly, the 82, the air outlet, the 83, the spiral case, the 84, the fixing seat, the 85, the compressor, the 86, the air inlet, the 9, the first accommodating cavity, the 10, the second accommodating cavity, the 11, the heat insulation layer, the 12, the partition plate, the 13, the third accommodating cavity, the 14, the first heater, the 15 and the wiring frame.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1,2 and 5, the medium-frequency static-change power supply structure applied to the low-temperature environment comprises a control cabinet main body 2, wherein a vent 5 is arranged in the upper part of the control cabinet main body 2, a medium-frequency static-change power supply main body 3 is arranged in one side, far away from the vent 5, of the upper part of the control cabinet main body 2, and a cabinet door 4 is arranged below one side, close to the medium-frequency static-change power supply main body 3, of the control cabinet main body 2;
a first accommodating cavity 9 is formed in the upper part inside the control cabinet main body 2, a second accommodating cavity 10 is arranged below the first accommodating cavity 9, and a third accommodating cavity 13 is arranged below the second accommodating cavity 10;
The pressurizing mechanism 8 is fixedly connected with the ventilation opening 5 through an internal air inlet 86, the two sides of the pressurizing mechanism 8 are provided with the automatic heating mechanism 7, the automatic heating mechanism 7 consists of a cabinet body 71, two second heaters 72, a first temperature detector 73, a second temperature detector 74 and a microcontroller, four pressure guide through holes are arranged on two outer walls of the cabinet body 71 of the automatic heating mechanism 7, the second heaters 72 are two n-shaped bodies arranged on two sides of the interior of the cabinet body 71, the n-shaped bodies consist of a vertical rubber sheet and two transverse air guide pipes, one end of each air guide pipe on each n-shaped body is connected to one side of the rubber sheet, three of the four air guide pipes penetrate through the inner wall of the cabinet body 71 and are inserted into the pressure guide through holes, the rest air duct is sealed and the sealed air duct is positioned at the lower position, the rubber material thin plate is a double-layer hollow shape which is respectively sealed, a metal area is adhered on the mutually close sides of the two rubber material thin plates, a metal heating strip or a metal heating wire is arranged in the metal, the first temperature detector 73 and the second temperature detector 74 are respectively vertically inserted on the inner wall of the bottom of the cabinet 71 and are respectively close to the metal areas of the two second heaters, the first temperature detector 73 and the second temperature detector 74 are electrically connected with the microcontroller, the limiting values set by the first temperature detector 73 and the second temperature detector 74 are different, the first temperature detector 73 is in a low temperature detection structure, the second temperature detector 74 is in a high temperature detection structure, wherein the microcontroller detects and reads the output signals of the first temperature detector 73 and the second temperature detector 74 at the same time, and obtains four kinds of information including current temperature value detection and whether the temperature sensor is abnormal, pressure detection of the first accommodating cavity 9 and whether the pressurizing mechanism 8 is abnormal through the output signals of the two temperature detectors and the change rates of the two output signals;
A plurality of wiring frames 15 are installed on one side of the inside of the second accommodating cavity 10, and a first heater 14 is installed on two sides of the inside of the second accommodating cavity 10.
In specific use, the user presses the control key 16 inside the intermediate frequency stationary power supply main body 3 to start the machine, and then the user adjusts the voltage by rotating the output voltage adjusting knob 19 to make the output voltage correspond to the load input voltage, so that the machine starts to output.
As shown in fig. 3, the medium frequency stationary power supply main body 3 is composed of a control key 16, an output frequency gear selecting knob 17, an output frequency adjusting knob 18, an output voltage adjusting knob 19, a three-phase switching display knob 20, a switching button 21, a power factor indicating lamp 22, a kilowatt indicating lamp 23, a factor display window 24, a current display window 25, a voltage display window 26, a frequency display window 27 and a connecting plate 28, wherein the control key 16 is arranged at one end below the front side of the connecting plate 28, the output frequency gear selecting knob 17 is arranged at one side of the control key 16, the output frequency adjusting knob 18 is arranged at one side of the output frequency gear selecting knob 17 far from the control key 16, the output voltage adjusting knob 19 is arranged at one side of the output frequency adjusting knob 18 far from the output frequency gear selecting knob 17, the three-phase switching display knob 20 is arranged at the other side of the output voltage adjusting knob 19, the switching button 21 is arranged at the other side of the three-phase switching display knob 20, the factor display window 24 is arranged above the switching button 21, the power factor indicating lamp 22 is arranged above the factor display window 24, the kilowatt indicating lamp 23 is arranged at one side of the power factor display window 22, the current display window 25 is arranged at one side of the current display window 25, the other side of the factor display window 25 is arranged at the other side of the voltage window 26, and the other side of the power factor display window 25 is arranged at one side.
As shown in fig. 4, the second heater 72 is installed at both sides of the inside of the cabinet 71, the first temperature detector 73 is installed at one side of the inside of the cabinet 71, and the second temperature detector 74 is installed at one side of the cabinet 71 remote from the first temperature detector 73. The second heater 72 is operated to heat the medium-frequency stationary power supply main body 3 when in specific use.
As shown in fig. 2, the second accommodating chamber 10 and the third accommodating chamber 13 are each of a box-shaped structure having a hollow interior, and a partition 12 is installed inside the second accommodating chamber 10 and the third accommodating chamber 13.
In particular use, the second receiving chamber 10 can thus be separated from the third receiving chamber 13 by the partition 12. As shown in fig. 1, the control cabinet main body 2 has a hollow box-shaped structure, an insulation layer 11 is recessed in one periphery of the control cabinet main body 2, and heat dissipation windows 1 are recessed below two sides of the control cabinet main body 2. By the effect of the insulating layer 11, the temperature inside the second accommodation chamber 10 can be ensured.
As shown in fig. 1, the cabinet door 4 is of a plate structure, a hinge is installed at the intersection of the cabinet door 4 and one side of the control cabinet main body 2, a handle 6 is installed at one side of the cabinet door 4 away from the hinge, and a safety lock is concavely arranged in the handle 6. When the cabinet door 4 is particularly used, the opening and closing of the cabinet door 4 can be conveniently controlled through the arrangement of the handle 6.
As shown in fig. 4, the first temperature detector 73 and the second temperature detector 74 are electrically connected to the second heater 72, the limit values set by the first temperature detector 73 and the second temperature detector 74 are different, the first temperature detector 73 is a low temperature detection structure, and the second temperature detector 74 is a high temperature detection structure.
In specific use, the first temperature detector 73 and the second temperature detector 74 can achieve the function of automatic heating.
As shown in fig. 2, a routing hole is provided in the lower part of the third accommodating chamber 13.
When the circuit is particularly used, the circuit can be better connected through the wiring hole.
As shown in fig. 3, the factor display window 24, the current display window 25, the voltage display window 26 and the frequency display window 27 all adopt LED nixie tube structures.
In specific use, the data of output voltage, output current, output frequency, load power and power factor can be displayed under the action of the factor display window 24, the current display window 25, the voltage display window 26 and the frequency display window 27.
As shown in fig. 1, 2 and 5, the pressurizing mechanism 8 is electrically connected with the power supply, and the pressurizing mechanism 8 is fixedly connected with the ventilation opening 5 through an internal air inlet 86 by adopting a connecting flange.
In particular, the wind power introduced through the air inlet 86 in the supercharging mechanism 8 can be input through the air vent 5.
When the device is to be used, first, the intermediate frequency stationary power supply main body 3 and the electric components are respectively installed in the first accommodation chamber 9 and the second accommodation chamber 10 inside the control cabinet main body 2, and the course of the line is performed in the third accommodation chamber 13. Then the user presses the control key 16 inside the intermediate frequency stationary power supply main body 3, the machine starts to start, and then the user adjusts the voltage by rotating the output voltage adjusting knob 19 so that the output voltage corresponds to the load input voltage, so that the machine starts to output, and simultaneously, the data of the output voltage, the output current, the output frequency, the load power and the power factor are displayed in the voltage display window 26, the current display window 25, the frequency display window 27 and the factor display window 24, respectively.
In the normal automatic temperature control detection mode, if the temperature inside the first accommodating cavity 9 is lower than the limit value of the first temperature detector 73, the second heater 72 is enabled to work under the action of the first temperature detector 73, the medium-frequency stationary power supply main body 3 is heated, and if the temperature reaches the limit value of the second temperature detector 74, the second heater 72 is turned off under the action of the second temperature detector 74.
And under the effect of booster mechanism 8 for outside air carries out the pressure boost, and the inside of first accommodation chamber 9 is imported to the air after the pressure boost, the phenomenon that the inside atmospheric pressure of first accommodation chamber 9 is lower can be very big is improved to the medium frequency stationarity power source main part 3 that makes the inside of first accommodation chamber 9 can not appear the phenomenon that the atmospheric pressure is lower.
When monitoring the temperature detection value, whether the temperature sensor is abnormal, the pressure of the first accommodating cavity 9 and whether the pressurizing mechanism 8 is abnormal or not, the microcontroller detects and reads the output signals of the first temperature detector 73 and the second temperature detector 74 at the same time, and obtains the information through the output signals of the two temperature detectors and the change rate of the two output signals, specifically, continuous equal period sampling of the two temperature detectors is carried out after the pressurizing mechanism 8 is started, whether the difference value of the output signals of the two first temperature detectors 73 and the second temperature detectors 74 exceeds a threshold value or not is judged through comparing the difference value of the output signals of the two first temperature detectors 73 and the second temperature detectors 74 in the previous sampling periods, if the difference value exceeds the threshold value, one or two preliminary abnormality of the temperature detectors is considered to be replaced, otherwise, the preliminary abnormality is considered, then the next step is carried out, the judgment is continued, the ascending gradient of the signal values is carried out through comparing the ascending change rate of the signal values in the middle sampling periods, if the two gradient values exceed a certain threshold value and the gradient value of the temperature detector on the side with a closed end is smaller than the gradient value of the other temperature detector, if the difference value of the two gradient values of the temperature detector on the side with the closed end is larger than the gradient value, or if the difference value of the two gradient value of the temperature detector on the side with the closed end is smaller than the value is equal to the normal. In this process, because the air pressure that the booster mechanism 8 produced enters into the cavity between the two layers of the rubber material sheet through the air duct, make the rubber material sheet expand under pressure, the deformation of this rubber material sheet drives the metal district uplift on it and thereby attaches to the temperature detector nearby, and one of them is in the air duct of lower position by being sealed, consequently make two rubber material sheet produce different deflection, therefore the heat that produces through the circular telegram of heating strip or heater strip on the metal district makes two metal districts press close to the temperature detector nearby with different distances, thereby make two temperature detectors produce different gradient changes.
In the middle several sampling periods, if both gradient values exceed a certain threshold value and the gradient value of the temperature detector near the side with the closed end air duct is smaller than the gradient value of the other temperature detector, and in the later several sampling periods, the air pressure value in the current air duct can be obtained by looking up the table after the temperature detector reaches the peak value stabilization, the table is obtained by correlating the relation between the deformation of the metal area and the peak value of the temperature detector and the deformation data of the air pressure value and the metal area in advance, the table is obtained by calibrating in advance, and if the difference of the values of the two temperature detectors in all the sampling periods is smaller than the threshold value, the abnormity of the pressurizing mechanism 8 is judged.
Therefore, the invention realizes the detection of two parameter states by only one sensor through the special structure and relative position design of the double temperature sensor and the heater and the asymmetric air guide structure design of the external air guide pipe, can realize the identification of the abnormal working states of the sensor and the booster pump, saves the sensor types and can improve the reliability and timeliness of data monitoring.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (7)
1. The medium-frequency static-change power supply structure applied to the low-temperature environment comprises a control cabinet main body (2) and is characterized in that a vent (5) is internally arranged above the control cabinet main body (2), a medium-frequency static-change power supply main body (3) is internally arranged at one side, far away from the vent (5), above the control cabinet main body (2), a cabinet door (4) is arranged below one side, close to the medium-frequency static-change power supply main body (3), of the control cabinet main body (2), a first accommodating cavity (9) is arranged in the upper part inside the control cabinet main body (2), a second accommodating cavity (10) is arranged below the first accommodating cavity (9), and a third accommodating cavity (13) is arranged below the second accommodating cavity (10);
The internal axis of the first accommodating cavity (9) is provided with a pressurizing mechanism (8), the pressurizing mechanism (8) is fixedly connected with the ventilation opening (5) through an internal air inlet (86) by adopting a connecting flange, two sides of the pressurizing mechanism (8) are provided with an automatic heating mechanism (7), the automatic heating mechanism (7) consists of a cabinet body (71), two second heaters (72), a first temperature detector (73), a second temperature detector (74) and a microcontroller, four pressure guide through holes are arranged on two outer walls of the cabinet body (71) of the automatic heating mechanism (7), the second heaters (72) are two pi-shaped bodies arranged on two sides of the interior of the cabinet body (71), the pi-shaped bodies consist of a vertical rubber material sheet and two transverse air guide pipes, one end of the air duct on the II-shaped body is connected to one side of the rubber material sheet, three of the four air ducts penetrate through the inner wall of the cabinet body (71) and are inserted into the pressure guide through holes, the rest one air duct is closed and the closed air duct is positioned at the lower position, the rubber material sheet is in a double-layer hollow shape which is respectively closed, a metal area is adhered to the mutually close sides of the two rubber material sheets, a metal heating strip or a metal heating wire is arranged in the metal, the first temperature detector (73) and the second temperature detector (74) are respectively vertically inserted on the inner wall of the bottom of the cabinet body (71) and the two temperature detectors are respectively close to the metal areas of the two second heaters, the first temperature detector (73) and the second temperature detector (74) are electrically connected with the microcontroller, the limiting values set by the first temperature detector (73) and the second temperature detector (74) are different, the first temperature detector (73) is of a low temperature detection structure, the second temperature detector (74) is of a high temperature detection structure, the microcontroller detects and reads output signals of the first temperature detector (73) and the second temperature detector (74) at the same time, and four kinds of information are obtained through the output signals of the two temperature detectors and the change rate of the two output signals, wherein the four kinds of information comprise whether the current temperature value is detected and the temperature sensor is abnormal, whether the pressure detection of the first accommodating cavity (9) and the pressurizing mechanism (8) are abnormal;
A plurality of wiring frames (15) are arranged on one side of the inside of the second accommodating cavity (10), and first heaters (14) are arranged on two sides of the inside of the second accommodating cavity (10);
The second accommodating cavity (10) and the third accommodating cavity (13) are of hollow box-shaped structures, and a partition plate (12) is arranged on the inner sides of the second accommodating cavity (10) and the third accommodating cavity (13);
The control cabinet is characterized in that the control cabinet body (2) is of a box-shaped structure with a hollow inside, an insulation layer (11) is concaved inwards in one circle of the inside of the control cabinet body (2), and radiating windows (1) are concaved inwards below two sides of the control cabinet body (2).
2. The medium frequency stationary power supply structure applied to a low temperature environment according to claim 1, wherein the medium frequency stationary power supply main body (3) is composed of a control key (16), an output frequency gear selection knob (17), an output frequency adjustment knob (18), an output voltage adjustment knob (19), a three-phase switching display knob (20), a switching button (21), a power factor indicating lamp (22), a kilowatt indicating lamp (23), a factor display window (24), a current display window (25), a voltage display window (26), a frequency display window (27) and a connecting plate (28), the control key (16) is arranged at one end below the front side of the connecting plate (28), the output frequency gear selection knob (17) is arranged at one side of the control key (16), the output frequency adjustment knob (18) is arranged at one side of the output frequency gear selection knob (17) which is far from the control key (16), the output voltage adjustment knob (19) is arranged at one side of the output frequency adjustment knob (18) which is far from the output frequency gear selection knob (17), the three-phase switching display knob (20) is arranged at one side of the output frequency adjustment knob (19) which is far from the output frequency gear selection knob (17), the switching button (21) is arranged at the other side of the three-phase switching knob (21) which is arranged at one side of the switching button (21), the power factor indicating lamp (22) is arranged above the factor display window (24), the kilowatt indicating lamp (23) is arranged on one side of the power factor indicating lamp (22), the current display window (25) is arranged on one side of the factor display window (24), the voltage display window (26) is arranged on the other side of the current display window (25), and the frequency display window (27) is arranged on the other side of the voltage display window (26).
3. The medium-frequency stationary power supply structure applied to the low-temperature environment is characterized in that the cabinet door (4) is of a plate body structure, a hinge is arranged at the intersection of the cabinet door (4) and one side of the control cabinet main body (2), a handle (6) is arranged on one side, far away from the hinge, of the cabinet door (4), and a safety lock is concavely arranged in the handle (6).
4. A medium frequency stationary power supply structure applied to a low temperature environment as set forth in claim 1, wherein a wiring hole is provided in the lower part of the third accommodation chamber (13).
5. The medium-frequency stationary power supply structure applied to a low-temperature environment is characterized in that the factor display window (24), the current display window (25), the voltage display window (26) and the frequency display window (27) are all of LED nixie tube structures.
6. A medium frequency stationary power supply structure applied to a low temperature environment as set forth in claim 1, wherein said pressurizing mechanism (8) is electrically connected to a power supply.
7. The medium frequency stationary power supply structure for low temperature environment according to claim 1, wherein the pressurizing mechanism (8) comprises an impeller assembly (81), an air outlet (82), a volute (83), a fixing seat (84), a compressor (85) and an air inlet (86), wherein the impeller assembly (81) is arranged on one side of the volute (83), the fixing seat (84) is arranged on the other side of the volute (83), the compressor (85) is arranged on the other side of the fixing seat (84), the air inlet (86) is arranged below the fixing seat (84), and the air outlet (82) is arranged above one side, far away from the air inlet (86), of the volute (83).
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| US7248808B2 (en) * | 2005-03-17 | 2007-07-24 | Kabushiki Kaisha Toshiba | Heating apparatus, heating apparatus control method and noncontact thermal sensing device |
| US8037714B2 (en) * | 2007-10-31 | 2011-10-18 | Illinois Tool Works Inc. | Adjustable air conditioning control system for a universal airplane ground support equipment cart |
| JP6451610B2 (en) * | 2015-12-03 | 2019-01-16 | 京セラドキュメントソリューションズ株式会社 | Fixing device and temperature sensor abnormality detection method |
| CN205277778U (en) * | 2016-01-08 | 2016-06-01 | 陈煌辉 | Temperature control type variable frequency control cabinet |
| CN110535058B (en) * | 2019-09-04 | 2024-05-03 | 上海乐研电气有限公司 | Electrical system with online sampling and checking function and checking method thereof |
| CN110986375B (en) * | 2019-11-29 | 2021-11-23 | 华帝股份有限公司 | Method for identifying failure of temperature detection device and gas water heater |
| CN113260229A (en) * | 2021-05-17 | 2021-08-13 | 深圳集智华创信息科技有限公司 | Energy-saving noise-reduction type variable frequency control cabinet and constant temperature control method |
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