CN203747668U - Frequency converter capable of heat dissipation by use of semiconductor refrigeration sheet - Google Patents
Frequency converter capable of heat dissipation by use of semiconductor refrigeration sheet Download PDFInfo
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- CN203747668U CN203747668U CN201420106135.1U CN201420106135U CN203747668U CN 203747668 U CN203747668 U CN 203747668U CN 201420106135 U CN201420106135 U CN 201420106135U CN 203747668 U CN203747668 U CN 203747668U
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Abstract
The utility model belongs to the technical field of a frequency converter and provides a frequency converter capable of heat dissipation by use of semiconductor refrigeration sheets. The frequency converter comprises a structure portion and an electrical portion. The structure portion comprises a plastic housing. The plastic housing is internally provided with a base, a radiator, a DC blower fan, a capacitance plate, the semiconductor refrigeration sheets, an IGBT module, a power strip, a switch power strip and a master control board. The master control board controls the radiator to work normally, the base is provided with the radiator, the DC blower fan is fixed to the rear end of the radiator, the air channel port at front end of the radiator is provided with the capacitance plate, there are two semiconductor refrigeration sheets, and each semiconductor refrigeration sheet has a cold surface and a hot surface. The advantages are as follows: the frequency converter with a heat dissipation design of both semiconductor refrigeration sheet effects and air cooling effects is employed, air cooling and heat dissipation are performed on the radiator through the blower fan, so that the purpose of good reliable heat dissipation is achieved, and the heat dissipation effect of the frequency converter is greatly improved, thus the purposes of prolonging the service life of the frequency converter and improving overall reliability are realized.
Description
Technical field
The utility model belongs to converter technology field, relates to a kind of its inner inverter power unit module (IGBT) and adopts semiconductor chilling plate and air-cooled coefficient frequency converter.
Background technology
Frequency converter, as a kind of RHVC, relies on its superior control performance and energy-saving effect, and it is widely applied in power electronics, electric drive, Industry Control.Along with petrochemical industry, textile printing and dyeing, metallurgical papermaking, building building etc. every profession and trade is to the improving constantly of frequency converter performance requirement, high controllability, practicality and reliability have become a large index of weighing frequency converter performance.
For the core in frequency converter---the heat dissipation problem of IGBT, it is a large bottleneck of restriction frequency converter industry development always, too high temperature rise will cause the shortening in frequency converter global reliability and useful life, seriously can cause the demolition of inversion module, thereby user's personal safety is caused damage.At present, industry mainly adopts three kinds of modes to dispel the heat, i.e. water-cooled, forced air cooling and natural heat dissipation.Because cost is low, effect better, the radiating mode of forced air cooling becomes the method that each producer generally adopts gradually.Even if but adopting wind-cooling heat dissipating, its temperature rise is also relatively high, can not reach reliable radiating effect.
Summary of the invention
Technical problem to be solved in the utility model is the present situation for prior art, and a kind of frequency converter that adopts semiconductor chilling plate heat radiation is provided, this frequency converter improves the radiating effect of frequency converter greatly, thereby reaches the useful life that extends frequency converter, improves the object of global reliability.
The utility model solves the problems of the technologies described above adopted technical scheme: a kind of frequency converter that adopts semiconductor chilling plate heat radiation, comprise structure division and electric part, it is characterized in that, described structure division includes plastic casing, in plastic casing, be provided with base, radiator, DC fan, capacitor board, semiconductor chilling plate, IGBT module, power panel, Switching Power Supply plate and master control borad, master control borad is controlled radiator and is normally worked, the radiator of described floor installation, rear end at radiator is fixed with DC fan, the front end wind passage mouth of radiator goes out to install capacitor board, described semiconductor chilling plate is altogether two and every and is divided into huyashi-chuuka (cold chinese-style noodles) and hot side, semiconductor chilling plate is fixed on radiator burnishing surface for the heat of huyashi-chuuka (cold chinese-style noodles) is conducted to radiator timely and effectively by hot side, described IGBT module is close to the huyashi-chuuka (cold chinese-style noodles) of semiconductor chilling plate the fastened by screw of processing with plastic partition thermal sleeve, master control borad and Switching Power Supply plate are positioned over moulds shell top, the stitch of described IGBT module is welded on power panel, the output line of semiconductor chilling plate is electrically connected to respectively the both positive and negative polarity of Switching Power Supply.
The measure of taking for optimization such scheme specifically comprises:
In above-mentioned a kind of frequency converter that adopts semiconductor chilling plate heat radiation, described semiconductor chilling plate and heat spreader module backplane specifications are in the same size, and on the hot side of two block semiconductor cooling pieces, evenly smear heat-conducting silicone grease, and by its hot side held against heat sink burnishing surface, the surrounding of described semiconductor chilling plate is fixed with heat insulating washer, on huyashi-chuuka (cold chinese-style noodles), equally evenly smear heat-conducting silicone grease, the fastened by screw that described IGBT module is close to its huyashi-chuuka (cold chinese-style noodles) and is processed with plastic partition thermal sleeve.
In above-mentioned a kind of frequency converter that adopts semiconductor chilling plate heat radiation; described Switching Power Supply plate provides output 24V voltage; in Switching Power Supply plate, mainly comprise that oscillation circuit, voltage stabilizing and protection loop form; when the input side of described oscillation circuit passes into direct current; oscillation circuit starting of oscillation is also exported square wave and after exchange conversion and filter action, is completed 24V Voltage-output and offer semiconductor chilling plate work; voltage stabilizing and protection loop, by the real-time monitoring to output voltage, compare rear automatic adjustment output voltage by signal feedback.
In above-mentioned a kind of frequency converter that adopts semiconductor chilling plate heat radiation, described oscillation circuit comprises startup vibration, high frequency conversion and filter step, the peripheral RC timing elements of 4 pins of the start-up circuit that described oscillation circuit is comprised of K3878 switching tube, transformer, UC3844 chip, dropping resistor and electrochemical capacitor and UC3844 thereof form, and the corresponding PWM ripple of starting of oscillation, high frequency conversion and output that described oscillation circuit mainly completes power supply carrys out the break-make speed of control switch pipe.
In above-mentioned a kind of frequency converter that adopts semiconductor chilling plate heat radiation, described voltage stabilizing and protection loop are comprised of loop of voltage regulation and protection loop, described voltage stabilizing and protection loop comprise pulse-width modulation, relatively amplify and sampling procedure, described loop of voltage regulation is mainly by reference voltage source TL431, PS2501 photoelectrical coupler, the voltage error amplifier of UC3844 inside and attached Chip-R, the compositions such as electric capacity, main being responsible for feeds back to 3844 chip internal amplification ratios by the 24V voltage change signal of output, thereby the PWM duty ratio of output is changed, complete the constant output of 24V voltage, protection loop one is comprised of 3844 chips itself and current sampling resistor and for output current is sampled, chip internal compares output, the failure of oscillation protection of control circuit, the 2nd, by diode in parallel on transformer input winding, chromatic circle resistance and ceramic disc capacitor form and for absorbing the reverse voltage of switching tube.
In above-mentioned a kind of frequency converter that adopts semiconductor chilling plate heat radiation, the electrical design of frequency converter partly comprises the rectifying part being electrically connected to successively, charge circuit, filtering part, Converting Unit, control loop part and man-machine interface part, described rectifying part comprise a plurality of diodes and for by industrial frequency AC electric rectification for pulsation direct current, for subordinate's circuit, described charge circuit is for the inhibition of impact electric current, buffering and live action, described filtering part is for becoming mild by the direct current of pulsation, eliminate peak voltage, Converting Unit is converted to direct current alternating current output again, complete the action of whole major loop, control loop partly comprises isolation drive plate, Switching Power Supply plate and master control borad, control loop partly carries out the effect of regulation and control comprehensively for playing in whole process for major loop, described isolation drive plate is used for exporting corresponding SPWM pulse, thereby control the switching rate of IGBT gate pole, reach the object of regulation output voltage and output frequency, described Switching Power Supply plate is used for reaching to voltage, the real-time control of frequency, master control borad is auxiliary each input signal to be processed for computing and protective circuit, computing, described man-machine interface is partly mainly used in the setting of user to its inner parameter, change and supervision and every warning and fault output display.
In above-mentioned a kind of frequency converter that adopts semiconductor chilling plate heat radiation, described charge circuit is comprised of charging resistor and contactor, charging resistor is for charging to storage capacitor at powered on moment, play inhibition and the cushioning effect of impact electric current, contactor adhesive then after charging, by charging resistor short circuit, complete powering on of frequency converter.
In above-mentioned a kind of frequency converter that adopts semiconductor chilling plate heat radiation, described filtering part adopts big capacity electrolyte capacitor group also for being responsible for, the direct current of pulsation to be become gently, elimination peak voltage.
Compared with prior art, the utility model has the advantage of the frequency converter that adopts semiconductor chilling plate and air-cooled coefficient heat dissipation design, and by blower fan, radiator is carried out to wind-cooling heat dissipating, the temperature of frequency converter integral body will significantly decline like this, finally reach the good object of heat radiation reliably, improve greatly the radiating effect of frequency converter, thereby reach the useful life that extends frequency converter, improve the object of global reliability.
Accompanying drawing explanation
Fig. 1 is to be structure division design drawing of the present utility model;
Fig. 2 is this Switching Power Supply plate electrical design system architecture diagram;
Fig. 3 is frequency converter electrical design major loop figure of the present utility model.
Embodiment
Be below specific embodiment of the utility model by reference to the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiment.
In figure, DC fan 11; IGBT module 12; Master control borad 13; Radiator 14; Capacitor board 15; Power panel 16; Switching Power Supply plate 17; Semiconductor chilling plate 18; Oscillation circuit 21; Voltage stabilizing and protection loop 22; Rectifying part 31; Charging resistor 32; Contactor 33; Capacitance group 34; Isolation drive plate 35.
As shown in Figure 1, Figure 2, Figure 3 shows, the frequency converter of this employing semiconductor chilling plate heat radiation, comprises structure division and electric part.
The scheme that wherein structure structural design aspect adopts is: structure division includes plastic casing, in plastic casing, be provided with base, radiator 14, DC fan 11, capacitor board 15, semiconductor chilling plate 18, IGBT module 12, power panel 16, Switching Power Supply plate 17 and master control borad 13, master control borad 13 is controlled radiator 14 and is normally worked, the radiator 14 of floor installation, in the rear end of radiator 14, be fixed with DC fan 11, the front end wind passage mouth of radiator 14 goes out to install capacitor board 15, semiconductor chilling plate 18 is altogether two and every and is divided into huyashi-chuuka (cold chinese-style noodles) and hot side, semiconductor chilling plate 18 is fixed on radiator 14 burnishing surfaces for the heat of huyashi-chuuka (cold chinese-style noodles) is conducted to radiator 14 timely and effectively by hot side, IGBT module 12 is close to the huyashi-chuuka (cold chinese-style noodles) of semiconductor chilling plate 18 fastened by screw of processing with plastic partition thermal sleeve, semiconductor chilling plate 18 is in the same size with radiator 14 module backplane specifications, and on the hot side of two block semiconductor cooling pieces 18, evenly smear heat-conducting silicone grease, and by its hot side held against heat sink 14 burnishing surfaces, the surrounding of semiconductor chilling plate 18 is fixed with heat insulating washer, like this to prevent scattering and disappearing of heat, on huyashi-chuuka (cold chinese-style noodles), equally evenly smear heat-conducting silicone grease, be beneficial to like this heat of huyashi-chuuka (cold chinese-style noodles) to conduct to timely and effectively on radiator 14 by hot side, the fastened by screw that IGBT module 12 is close to its huyashi-chuuka (cold chinese-style noodles) and is processed with plastic partition thermal sleeve, master control borad 13 and Switching Power Supply plate 17 are positioned over moulds shell top, the stitch of IGBT module 12 is welded on power panel 16.
Electric part comprises Switching Power Supply plate 17 electric parts and frequency converter electric part, and Switching Power Supply plate 17 provides the 24V voltage of stable output here, and Switching Power Supply plate 17 is interior mainly comprises that oscillation circuit 21, voltage stabilizing and protection loop 22 form.Oscillation circuit 21 comprises and starts vibration, high frequency conversion and filter step, and voltage stabilizing and protection loop 22 are comprised of loop of voltage regulation and protection loop, and voltage stabilizing and protection loop 22 comprise pulse-width modulation, relatively amplify and sampling procedure.
Oscillation circuit 21 is comprised of the peripheral RC timing elements of 4 pins of the start-up circuit of K3878 switching tube, transformer, UC3844 chip, dropping resistor and 34 one-tenth of electrochemical capacitor groups and UC3844 thereof, and the corresponding PWM ripple of starting of oscillation, high frequency conversion and output that oscillation circuit 21 mainly completes power supply carrys out the break-make speed of control switch pipe.
Loop of voltage regulation is mainly comprised of the voltage error amplifier of reference voltage source TL431, PS2501 photoelectrical coupler, UC3844 inside and attached Chip-R, electric capacity etc., main being responsible for feeds back to 3844 chip internal amplification ratios by the 24V voltage change signal of output, thereby the PWM duty ratio of output is changed, complete the constant output of 24V voltage.
Protection loop one is comprised of 3844 chips itself and current sampling resistor etc., and the 2nd, by diode (BYV26G), chromatic circle resistance (100K, 3W) and the ceramic disc capacitor of parallel connection on transformer input winding (103,2KV), formed.The former is mainly to output current sampling, and chip internal compares output, the failure of oscillation protection of control circuit.The latter's effect is the reverse voltage that absorbs switching tube.
The design of 24V Switching Power Supply plate 17 will be completed above, on this basis, the black outer lead of the red outer lead of a slice semiconductor chilling plate 18 and another sheet cooling piece is connected and fixed, again two cooling pieces are distinguished to remaining black and red outer lead exact connect ion to negative pole and the positive pole of 24V Switching Power Supply plate 17, complete both being connected in series, so just, integral layout and the electrical design of semiconductor chilling plate 18 have been completed, when frequency converter and Switching Power Supply energising operation, the heat of IGBT module 12 bottom surfaces is by the conducting on the radiator 14 contacting with hot side rapidly and efficiently of the huyashi-chuuka (cold chinese-style noodles) by semiconductor chilling plate 18, and then by blower fan, radiator 14 is carried out to wind-cooling heat dissipating, the temperature of frequency converter integral body will significantly decline like this, finally reach the good object of heat radiation reliably.
The electrical design of frequency converter partly comprises the rectifying part 31 being electrically connected to successively, charge circuit, filtering part, Converting Unit, control loop part and man-machine interface part, rectifying part 31 comprise a plurality of diodes and for by industrial frequency AC electric rectification for pulsation direct current, for subordinate's circuit, charge circuit is for the inhibition of impact electric current, buffering and live action, filtering part adopts big capacity electrolyte capacitor, and for the direct current of pulsation is become to mild, eliminate peak voltage, Converting Unit is converted to direct current alternating current output again, complete the action of whole major loop, control loop partly comprises isolation drive plate 35, Switching Power Supply plate 17 and master control borad 13, control loop partly carries out the effect of regulation and control comprehensively for playing in whole process for major loop, mainly be distributed as switching power circuit, drive circuit, testing circuit, protective circuit and governor circuit etc.Switching Power Supply is mainly comprised of 3844 switching power source chips, switching tube, transformer and other voltage stabilizings and calibration circuit, and being used for provides multichannel stabilized power supply for subordinate's circuit; Drive circuit is exported corresponding SPWM pulse by main control chip and auxiliary circuit; thereby control the switching rate of IGBT module 12 gate poles; testing circuit mainly carries out amplification and the comparison of signal by operational amplifier and auxiliary circuit to sampling resistor, realize every defencive function.Master control borad 13 mainly completes every control function of frequency converter in the calculation process of signal and the output of every analog quantity, switching value and temperature detection.
Isolation drive plate 35 is for exporting corresponding SPWM pulse; thereby control the switching rate of IGBT gate pole; reach the object of regulation output voltage and output frequency; Switching Power Supply plate 17 is for reaching the real-time control to voltage, frequency; master control borad 13 for computing and protective circuit be auxiliary to each input signal process, computing, man-machine interface is partly mainly used in user to the setting of its inner parameter, change and supervision and every warning and fault output display
Charge circuit is comprised of charging resistor 32 and contactor 33, charging resistor 32, for charging to storage capacitor at powered on moment, plays inhibition and the cushioning effect of impact electric current, contactor 33 meeting adhesives then after charging, by charging resistor 32 short circuits, complete powering on of frequency converter.
As shown in Figure 3 when input passes into after three-phase electricity, the rectifying part 31 that diode forms is carried out rectification, alternating current is converted to the direct current of pulsation, by charging resistor 32, give capacitance group 34 chargings again, after treating that capacitance group 34 is full of, contactor 33 receives adhesive signal, by its short circuit, then filter circuit carries out flat ripple effect, finally, Converting Unit is converted to direct current alternating current output again, complete the action of whole major loop, Switching Power Supply plate 17 and master control borad 13 play for major loop and carry out the effect of regulation and control comprehensively in whole process, wherein Switching Power Supply plate 17 can pass through drive circuit, Switching Power Supply part, testing circuit, protective circuits etc. reach voltage, the real-time control of frequency, wherein master control borad 13 can be take DSP main control chip as core, other computings and protective circuit are auxiliary each input signal to be processed, computing, thereby reach every control effect.
Specific embodiment described herein is only to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various modifications or supplements or adopt similar mode to substitute described specific embodiment, but can't depart from the defined scope of spirit of the present utility model.
Claims (8)
1. a frequency converter that adopts semiconductor chilling plate heat radiation, comprise structure division and electric part, it is characterized in that, described structure division includes plastic casing, in plastic casing, be provided with base, radiator, DC fan, capacitor board, semiconductor chilling plate, IGBT module, power panel, Switching Power Supply plate and master control borad, master control borad is controlled radiator and is normally worked, the radiator of described floor installation, rear end at radiator is fixed with DC fan, the front end wind passage mouth of radiator goes out to install capacitor board, described semiconductor chilling plate is altogether two and every and is divided into huyashi-chuuka (cold chinese-style noodles) and hot side, semiconductor chilling plate is fixed on radiator burnishing surface for the heat of huyashi-chuuka (cold chinese-style noodles) is conducted to radiator timely and effectively by hot side, described IGBT module is close to the huyashi-chuuka (cold chinese-style noodles) of semiconductor chilling plate the fastened by screw of processing with plastic partition thermal sleeve, master control borad and Switching Power Supply plate are positioned over moulds shell top, the stitch of described IGBT module is welded on power panel, the output line of semiconductor chilling plate is electrically connected to respectively the both positive and negative polarity of Switching Power Supply.
2. a kind of frequency converter that adopts semiconductor chilling plate heat radiation according to claim 1, it is characterized in that, described semiconductor chilling plate and heat spreader module backplane specifications are in the same size, and on the hot side of two block semiconductor cooling pieces, evenly smear heat-conducting silicone grease, and by its hot side held against heat sink burnishing surface, the surrounding of described semiconductor chilling plate is fixed with heat insulating washer, on huyashi-chuuka (cold chinese-style noodles), equally evenly smear heat-conducting silicone grease, the fastened by screw that described IGBT module is close to its huyashi-chuuka (cold chinese-style noodles) and is processed with plastic partition thermal sleeve.
3. a kind of frequency converter that adopts semiconductor chilling plate heat radiation according to claim 1, it is characterized in that, described Switching Power Supply plate provides output 24V voltage, in Switching Power Supply plate, mainly comprise oscillation circuit, voltage stabilizing and protection loop form, when the input side of described oscillation circuit passes into direct current, oscillation circuit starting of oscillation is also exported square wave and after exchange conversion and filter action, is completed 24V Voltage-output and offer semiconductor chilling plate work, voltage stabilizing and protection loop are by the real-time monitoring to output voltage, signal feedback is compared to rear automatic adjustment output voltage.
4. a kind of frequency converter that adopts semiconductor chilling plate heat radiation according to claim 3, it is characterized in that, described oscillation circuit comprises startup vibration, high frequency conversion and filter step, the peripheral RC timing elements of 4 pins of the start-up circuit that described oscillation circuit is comprised of K3878 switching tube, transformer, UC3844 chip, dropping resistor and electrochemical capacitor and UC3844 thereof form, and the corresponding PWM ripple of starting of oscillation, high frequency conversion and output that described oscillation circuit mainly completes power supply carrys out the break-make speed of control switch pipe.
5. a kind of frequency converter that adopts semiconductor chilling plate heat radiation according to claim 3, it is characterized in that, described voltage stabilizing and protection loop are comprised of loop of voltage regulation and protection loop, described voltage stabilizing and protection loop comprise pulse-width modulation, relatively amplify and sampling procedure, described loop of voltage regulation is mainly by reference voltage source TL431, PS2501 photoelectrical coupler, the voltage error amplifier of UC3844 inside and attached Chip-R, the compositions such as electric capacity, main being responsible for feeds back to 3844 chip internal amplification ratios by the 24V voltage change signal of output, thereby the PWM duty ratio of output is changed, complete the constant output of 24V voltage, protection loop one is comprised of 3844 chips itself and current sampling resistor and for output current is sampled, chip internal compares output, the failure of oscillation protection of control circuit, the 2nd, by diode in parallel on transformer input winding, chromatic circle resistance and ceramic disc capacitor form and for absorbing the reverse voltage of switching tube.
6. a kind of frequency converter that adopts semiconductor chilling plate heat radiation according to claim 1, it is characterized in that, the electrical design of frequency converter partly comprises the rectifying part being electrically connected to successively, charge circuit, filtering part, Converting Unit, control loop part and man-machine interface part, described rectifying part comprise a plurality of diodes and for by industrial frequency AC electric rectification for pulsation direct current, for subordinate's circuit, described charge circuit is for the inhibition of impact electric current, buffering and live action, described filtering part is for becoming mild by the direct current of pulsation, eliminate peak voltage, Converting Unit is converted to direct current alternating current output again, complete the action of whole major loop, control loop partly comprises isolation drive plate, Switching Power Supply plate and master control borad, control loop partly carries out the effect of regulation and control comprehensively for playing in whole process for major loop, described isolation drive plate is used for exporting corresponding SPWM pulse, thereby control the switching rate of IGBT gate pole, reach the object of regulation output voltage and output frequency, described Switching Power Supply plate is used for reaching to voltage, the real-time control of frequency, master control borad is auxiliary each input signal to be processed for computing and protective circuit, computing, described man-machine interface is partly mainly used in the setting of user to its inner parameter, change and supervision and every warning and fault output display.
7. a kind of frequency converter that adopts semiconductor chilling plate heat radiation according to claim 6, it is characterized in that, described charge circuit is comprised of charging resistor and contactor, charging resistor is for charging to storage capacitor at powered on moment, play inhibition and the cushioning effect of impact electric current, contactor adhesive then after charging, by charging resistor short circuit, completes powering on of frequency converter.
8. a kind of frequency converter that adopts semiconductor chilling plate heat radiation according to claim 6, is characterized in that, described filtering part adopts big capacity electrolyte capacitor group and for being responsible for, the direct current of pulsation become gently, eliminates peak voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420106135.1U CN203747668U (en) | 2014-03-10 | 2014-03-10 | Frequency converter capable of heat dissipation by use of semiconductor refrigeration sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420106135.1U CN203747668U (en) | 2014-03-10 | 2014-03-10 | Frequency converter capable of heat dissipation by use of semiconductor refrigeration sheet |
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| CN203747668U true CN203747668U (en) | 2014-07-30 |
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| CN201420106135.1U Expired - Fee Related CN203747668U (en) | 2014-03-10 | 2014-03-10 | Frequency converter capable of heat dissipation by use of semiconductor refrigeration sheet |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105932990A (en) * | 2016-04-17 | 2016-09-07 | 合肥博雷电气有限公司 | Switching device of all-solid-state high-voltage modulator |
| CN106026684A (en) * | 2015-03-31 | 2016-10-12 | 富士电机株式会社 | Electric power conversion device |
| CN106839178A (en) * | 2017-03-23 | 2017-06-13 | 合肥开泰机电科技有限公司 | A kind of intelligent miniature dehumidifier |
| CN107036190A (en) * | 2017-04-07 | 2017-08-11 | 合肥开泰机电科技有限公司 | A kind of dehumidifying cabinet for spare parts device based on separating type cold heat exchange |
-
2014
- 2014-03-10 CN CN201420106135.1U patent/CN203747668U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026684A (en) * | 2015-03-31 | 2016-10-12 | 富士电机株式会社 | Electric power conversion device |
| CN106026684B (en) * | 2015-03-31 | 2019-10-01 | 富士电机株式会社 | Power inverter |
| CN105932990A (en) * | 2016-04-17 | 2016-09-07 | 合肥博雷电气有限公司 | Switching device of all-solid-state high-voltage modulator |
| CN106839178A (en) * | 2017-03-23 | 2017-06-13 | 合肥开泰机电科技有限公司 | A kind of intelligent miniature dehumidifier |
| CN106839178B (en) * | 2017-03-23 | 2019-10-08 | 合肥开泰机电科技有限公司 | A kind of intelligent miniature dehumidifier |
| CN107036190A (en) * | 2017-04-07 | 2017-08-11 | 合肥开泰机电科技有限公司 | A kind of dehumidifying cabinet for spare parts device based on separating type cold heat exchange |
| CN107036190B (en) * | 2017-04-07 | 2019-07-16 | 合肥开泰机电科技有限公司 | A kind of dehumidifying cabinet for spare parts device based on separating type cold heat exchange |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: ZHEJIANG XINFULING ELECTRIC CO., LTD. Free format text: FORMER NAME: TAIZHOU FULING ELECTRIC CO., LTD. |
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| CP01 | Change in the name or title of a patent holder |
Address after: 317519, 2, North Ring Road, Wenling City, Zhejiang, Taizhou Patentee after: ZHEJIANG NEW FOLINN ELECTRIC CO.,LTD. Address before: 317519, 2, North Ring Road, Wenling City, Zhejiang, Taizhou Patentee before: TAIZHOU FULING ELECTRICAL Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140730 |