CN203445772U - Cooling system for converter - Google Patents
Cooling system for converter Download PDFInfo
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- CN203445772U CN203445772U CN201320602407.2U CN201320602407U CN203445772U CN 203445772 U CN203445772 U CN 203445772U CN 201320602407 U CN201320602407 U CN 201320602407U CN 203445772 U CN203445772 U CN 203445772U
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- cooling
- heat exchanger
- evaporator
- liquid cooling
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Abstract
Disclosed is a cooling system for a converter comprises a heating element. The cooling system is used for cooling the heating element and comprises a liquid inlet pipe (401), a liquid outlet pipe (402), a first liquid cooling device (20) and a second liquid cooling device (10). The first liquid cooling device (20) comprises a liquid cooling heat sink (201). The second liquid cooling device (10) comprises a condenser (103), an evaporator (101) and a compressor (102). The condenser (103), the evaporator (101) and the compressor (102) are connected into a first closed circuit through a pipeline. A refrigerant is disposed in the first closed circuit. According to the utility model, by arrangement of the first and second liquid cooling devices in the converter, the air temperature in a converter cabinet is greatly reduced, and therefore the service life and reliability of components in the cabinet are increased.
Description
Technical field
The utility model relates to field of electrical equipment, relates in particular to a kind of cooling system of current transformer.
Background technology
Along with the development of power electronic technology, the structural design of high-power converter (comprising wind electric converter, photovoltaic DC-to-AC converter) is more and more compacter, like this, causes heat more and more concentrated on the one hand, causes on the other hand heat radiation more difficult.Past solution is normally arranged on the heater element in current transformer (as IGBT, rectifier bridge) etc. on the radiator of copper (aluminium) system, and on cabinet (shell) body of this radiator, installs fan additional, and the air channel of matching design allows heat fall apart to outside.But along with the raising of power density, the increase of current transformer caloric value, the air-cooled requirement that can not meet heat radiation.In recent years, water-cooling technology has had development at full speed, and it has not only surpassed as radiating modes such as air-cooled, heat pipes on radiating effect, and in noise control, the aspects such as applied environment adaptability have also reached good effect.Therefore,, high-power, in the heat radiation of the power electronic product of high power density, water-cooling technology is used widely.
After adopting water-cooling, for the sealing IP grade of current transformer rack can be done more, simultaneously also in order to meet the instructions for use of various adverse circumstances, except the IGBT of high heat flux adopts the radiating mode of direct water-cooling (by liquid cooling heat radiator by the dissipation of heat of IGBT outside rack), other heater element of current transformer interior of equipment cabinet (comprises inductance, copper bar, contactor, circuit breaker, capacitance module, fuse etc.) common employing first transfers heat to the air of current transformer interior of equipment cabinet, air after being heated enters the gas-liquid heat exchanger in converter cabinet under the driving of blower fan, effect due to the temperature difference, the heat of air will pass to gas-liquid heat exchanger, the heat of gas-liquid heat exchanger will pass to the cooling fluid of gas-liquid heat exchanger further, mobile cooling fluid is taken this heat out of current transformer rack, enter in outside heat exchanger and (be generally air-cooled heat exchanger), finally by this outside heat exchanger, heat is delivered in atmosphere, thereby reach cooling object, as shown in Figure 1.
According to the first law of thermodynamics, heat can only be delivered to cryogenic object from high temp objects.In above-mentioned narrated heat transfer process, existence due to thermal resistance, the temperature of current transformer rack internal heat generation element must be greater than the air themperature in rack, and the air themperature in rack must be greater than the temperature of gas-liquid heat exchanger, and the temperature of gas-liquid heat exchanger must be greater than the temperature of cooling fluid; Same, the coolant temperature in current transformer rack must be greater than extraneous ambient temperature, could meet heat and from the heater element in cabinet, be delivered to the process of current transformer outside air.
Therefore, the air themperature in rack generally can be than high 10 degree～30 degree of ambient temperature, and regional area even can be higher.For example, when ambient temperature is 45 degree, it is even higher that the air themperature in rack will reach 70 degree.
As everyone knows, one of principal element that affects device useful life and reliability is its ambient temperature of using.Adopt the current transformer of water-cooling, in its cabinet, air themperature is high more a lot of than ambient temperature, in order to guarantee useful life and the reliability of device, generally need to use nonstandard resistant to elevated temperatures device to solve, and adopt the cost of nonstandard resistant to elevated temperatures device to be multiplied.If but do not use high temperature resistant device, will there are frequently various faults in current transformer, the periodic replacement of device and periodic maintenance cost will be higher.
Utility model content
The utility model is for the current transformer of existing use water-cooling, in its cabinet, air themperature is high more a lot of than ambient temperature, useful life and the reliability of components and parts in rack have been reduced, increased the manufacturing cost of current transformer and the problem of maintenance cost, a kind of cooling system of current transformer is provided.
The solution that the utility model provides with regard to its technical purpose is as follows:
The utility model provides a kind of cooling system of current transformer, described current transformer comprises heater element, described cooling system is for dispelling the heat to described heater element, and described cooling system comprises input duct, fluid pipeline, the first liquid cooling apparatus and the second liquid cooling apparatus;
Described the first liquid cooling apparatus comprises liquid cooling heat radiator; This liquid cooling heat radiator has liquid cooling heat radiator inlet and liquid cooling heat radiator liquid outlet; Described the second liquid cooling apparatus comprises condenser, evaporator and compressor; Described condenser, described evaporator and described compressor connect into the first loop by pipeline; In this first loop, be provided with cold-producing medium; Described condenser has condenser inlet and condenser liquid outlet;
Described liquid cooling heat radiator inlet and described condenser inlet are communicated with described input duct respectively; Described liquid cooling heat radiator liquid outlet and described condenser liquid outlet respectively with described fluid pipeline communication.
In the cooling system of the current transformer that the utility model is above-mentioned, described the second liquid cooling apparatus also comprises evaporator fan, and this evaporator fan is connected with described evaporator by wind chamber.
In the cooling system of the current transformer that the utility model is above-mentioned, described the second liquid cooling apparatus also comprises the first liquid cooling heat exchanger, described the first liquid cooling heat exchanger has the first liquid cooling heat exchanger inlet and the first liquid cooling heat exchanger liquid outlet, and described evaporator has evaporator inlet and evaporator liquid outlet;
Described evaporator inlet is communicated with described input duct, and described evaporator liquid outlet is communicated with described the first liquid cooling heat exchanger inlet, described the first liquid cooling heat exchanger liquid outlet and described fluid pipeline communication.
In the cooling system of the current transformer that the utility model is above-mentioned, described the second liquid cooling apparatus also comprises the first pump, the second liquid cooling heat exchanger; This second liquid cooling heat exchanger has the second liquid cooling heat exchanger inlet and the second liquid cooling heat exchanger liquid outlet, and described evaporator has evaporator inlet and evaporator liquid outlet;
Described evaporator liquid outlet is communicated with the pump inlet of described the first pump, the pump liquid outlet of described the first pump is communicated with described the second liquid cooling heat exchanger inlet, described the second liquid cooling heat exchanger liquid outlet is communicated with described evaporator inlet, thereby forms the second loop; In described the second loop, be provided with the second cooling fluid.
In the cooling system of the current transformer that the utility model is above-mentioned, described cooling system also comprises external heat exchanger and the cooling fluid supply device that is arranged on described current transformer outside; Described external heat exchanger has external heat exchanger inlet and external heat exchanger liquid outlet, and described cooling fluid supply device has cooling fluid supply device inlet and cooling fluid supply device liquid outlet;
Described fluid pipeline is communicated with described external heat exchanger inlet, and described external heat exchanger liquid outlet is communicated with described cooling fluid supply device inlet, and described cooling fluid supply device liquid outlet is communicated with described input duct;
In described fluid pipeline, described input duct, described external heat exchanger, described cooling fluid supply device and the passage that is interconnected thereof, be provided with the first cooling fluid.
In the cooling system of the current transformer that the utility model is above-mentioned, described cooling fluid supply device comprises that being used to described the first cooling fluid to move provides the second pump of power.
In the cooling system of the current transformer that the utility model is above-mentioned, described heater element comprises IGBT heater element, inductor, capacitor, copper bar, contactor, circuit breaker, fuse.
The utility model, by the first liquid cooling apparatus and the second liquid cooling apparatus are set in current transformer inside, has reduced the air themperature in current transformer rack widely, thereby has improved useful life and the reliability of components and parts in rack; On the other hand, the first liquid cooling apparatus of the present utility model and the second liquid cooling apparatus share feed liquor and fluid pipeline, its pipeline structure compact in design, simple and practical, and cost is lower.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing:
Fig. 1 is the schematic diagram of an embodiment of the cooling system of existing current transformer;
Fig. 2 is the schematic diagram of cooling system of the current transformer of the utility model the first embodiment;
Fig. 3 is the schematic diagram of cooling system of the current transformer of the utility model the second embodiment;
Fig. 4 is the schematic diagram of cooling system of the current transformer of the utility model the 3rd embodiment.
Embodiment
For the ease of those of ordinary skills, understand and implement the utility model, below in conjunction with the drawings and specific embodiments, the cooling system of current transformer of the present utility model being elaborated.
The first embodiment
With reference to Fig. 2, Fig. 2 shows the cooling system of the current transformer of the utility model the first embodiment.Current transformer comprises heater element, and this heater element mainly comprises IGBT heater element (insulated gate bipolar transistor), inductor, capacitor, copper bar, contactor, circuit breaker, fuse etc.
The cooling system of this current transformer is mainly used in heater element to dispel the heat.Particularly, this cooling system comprises input duct 401, fluid pipeline 402, the first liquid cooling apparatus 20 and the second liquid cooling apparatus 10; Wherein, the first liquid cooling apparatus 20 can be mainly used in IGBT heater element to dispel the heat.The second liquid cooling apparatus 10 can be mainly used in other heater elements in current transformer to dispel the heat.
The first liquid cooling apparatus 20 comprises liquid cooling heat radiator 201, and this liquid cooling heat radiator 201 has liquid cooling heat radiator inlet and liquid cooling heat radiator liquid outlet, and heater element is arranged on liquid cooling heat radiator 201.Liquid cooling heat radiator 201 is generally become by metal guide hot body or other nonmetallic heat conductive system, the heat distributing during heater element work, by heat, conducted and passed to the liquid cooling heat radiator 201 of being made by this heat carrier, the heat on this liquid cooling heat radiator 201 is taken away by the cooling fluid in this liquid cooling heat radiator 201.
In the present embodiment, the first liquid cooling apparatus 20 can comprise a plurality of liquid cooling heat radiators 201, and the plurality of liquid cooling heat radiator 201 is all arranged at current transformer inside.And the plurality of liquid cooling heat radiator inlet is all communicated with input duct 401; The plurality of liquid cooling heat radiator liquid outlet is all communicated with fluid pipeline 402.
In the present embodiment, with reference to Fig. 2, cooling system also comprises external heat exchanger 30 and the cooling fluid supply device 40 that is arranged on current transformer outside; External heat exchanger 30 has external heat exchanger inlet and external heat exchanger liquid outlet, and cooling fluid supply device 40 has cooling fluid supply device inlet and cooling fluid supply device liquid outlet;
With reference to Fig. 2, fluid pipeline 402 is communicated with external heat exchanger inlet, and external heat exchanger liquid outlet is communicated with cooling fluid supply device inlet, and cooling fluid supply device liquid outlet is communicated with input duct 401;
Like this, the first liquid cooling apparatus 20, fluid pipeline 402, input duct 401, external heat exchanger 30, cooling fluid supply device 40 and the passage that is interconnected thereof form the 3rd loop;
Cooling fluid supply device 40 is for inputting the first cooling fluid to input duct 401.This first cooling fluid can circulate in the 3rd loop.
Further, the first cooling fluid can be any one in water, ethylene glycol, propylene glycol, or both (for example glycol water, aqueous solution of propylene glycol) such as mixed liquors wherein.In the present embodiment, this cooling fluid is the mixed liquor of water, ethylene glycol.
In the present embodiment, cooling fluid supply device 40 comprises the second pump (not shown) that is used to the first cooling fluid motion that power is provided.Particularly, this second pump is for providing the power circulating at the 3rd loop to the first cooling fluid.
The heat radiation process of this first liquid cooling apparatus 20 is as follows: the evolution of heat when work of IGBT heater element, this heat is conducted and is delivered to the liquid cooling heat radiator 201 of being made by heat carrier by heat, the first cooling fluid in this liquid cooling heat radiator 201 is by carrying out heat exchange with liquid cooling heat radiator 201, obtain the heat of liquid cooling heat radiator 201, then this first cooling fluid is taken heat out of current transformer, again by external heat exchanger 30 by dissipation of heat in the air of current transformer outside, finally come back in cooling fluid supply device 40, thereby realized recycling of the first cooling fluid.
Certainly can understand, external heat exchanger 30 is not necessary device, and the heat of current transformer inside passes to after the first cooling fluid, and this first cooling fluid can directly be discharged by fluid pipeline 402, or is connected with other system (as steam generator system).
Further, with reference to Fig. 2, the second liquid cooling apparatus 10 comprises condenser 103, evaporator 101 and compressor 102; Condenser 103, evaporator 101 and compressor 102 connect into the first loop by pipeline, and this pipeline comprises the pipeline assemblies such as expansion valve; In this first loop, be provided with cold-producing medium; In the present embodiment, evaporator 101 is arranged at current transformer inside, and condenser 103 has condenser inlet and condenser liquid outlet.
Meanwhile, with reference to Fig. 2, condenser inlet is also communicated with input duct 401; Condenser liquid outlet is also communicated with fluid pipeline 402.Like this, cooling fluid supply device 40 can be through condenser from flowing to fluid pipeline 402 to the first cooling fluid of input in input duct 401, thereby flow out current transformer.
The heat radiation process of this second liquid cooling apparatus 10 is as follows: the dissipation of heat that the heater element of current transformer inside is sent is to the air of current transformer inside, evaporator 101 is the entrained heat absorption of the air of current transformer inside, and by this heat, the cold-producing medium in evaporator evaporated; The cold-producing medium of this evaporation enters condenser 103 under the effect of compressor 102, and carry out heat exchange with same the first cooling fluid in this condenser 103 in this condenser 103, thereby the entrained heat of cold-producing medium is passed to the first cooling fluid, and take current transformer out of by the first cooling fluid.
In the present embodiment, absorb the efficiency of the entrained heat of the air of current transformer inside in order to improve evaporator 101, evaporator 101 can arrange a plurality of.
Meanwhile, in order to accelerate the heat exchange between evaporator 101 and the air of current transformer inside, the second liquid cooling apparatus 10 also comprises evaporator fan, and this evaporator fan is connected with evaporator 101 by wind chamber.By this evaporator fan, can accelerate the flowing velocity of the air of current transformer inside.
The utility model, by the first liquid cooling apparatus and the second liquid cooling apparatus are set in current transformer inside, has reduced the air themperature in current transformer rack widely, thereby has improved useful life and the reliability of components and parts in rack; On the other hand, the first liquid cooling apparatus of the present utility model and the second liquid cooling apparatus share feed liquor and fluid pipeline, its pipeline structure compact in design, simple and practical, and cost is lower.
The second embodiment
The different structures that are the second liquid cooling apparatus 10 of the second embodiment of the present utility model and the first embodiment.
In the present embodiment, with reference to Fig. 3, the second liquid cooling apparatus 10 also comprises that the first liquid cooling heat exchanger 105, the first liquid cooling heat exchangers 105 have the first liquid cooling heat exchanger inlet and the first liquid cooling heat exchanger liquid outlet, and evaporator 101 has evaporator inlet and evaporator liquid outlet;
With reference to Fig. 3, evaporator inlet is communicated with input duct 401, and evaporator liquid outlet is communicated with the first liquid cooling heat exchanger inlet, and the first liquid cooling heat exchanger liquid outlet is communicated with fluid pipeline 402.Like this, the first cooling fluid can flow out current transformer by evaporator 101 and the first liquid cooling heat exchanger 105 successively.
Wherein, the first cooling fluid enters evaporator 101 from evaporator inlet, by evaporator 101, absorbed heat and lower the temperature, then from evaporator liquid outlet, flow out, enter the first liquid cooling heat exchanger 105, carry out heat exchange with the air of current transformer inside, thereby absorb the airborne heat of current transformer, then flow out current transformer.
In order to make air and the heat exchange between the first cooling fluid of current transformer inside more efficient, the first liquid cooling heat exchanger 105 can arrange a plurality of.
The 3rd embodiment
The different structures that are also the second liquid cooling apparatus 10 of the 3rd embodiment of the present utility model and the first embodiment.
With reference to Fig. 4, the second liquid cooling apparatus 10 also comprises the first pump 104, the second liquid cooling heat exchanger 106; This second liquid cooling heat exchanger 106 has the second liquid cooling heat exchanger inlet and the second liquid cooling heat exchanger liquid outlet, and evaporator 101 has evaporator inlet and evaporator liquid outlet;
With reference to Fig. 4, evaporator liquid outlet is communicated with the pump inlet of the first pump 104, and the pump liquid outlet of the first pump 104 is communicated with the second liquid cooling heat exchanger inlet, and the second liquid cooling heat exchanger liquid outlet is communicated with evaporator inlet, thereby forms the second loop; In the second loop, be provided with the second cooling fluid.
Described the second cooling fluid can be any one in water, ethylene glycol, propylene glycol, or both mixed liquors etc. wherein.In the present embodiment, this second cooling fluid is the mixed liquor of water, ethylene glycol.
Wherein, the power of the first pump 104 for providing this second cooling fluid to circulate at this second loop.The second cooling fluid is under the driving of this first pump 104, by the second liquid cooling heat exchanger inlet, enter in the second liquid cooling heat exchanger 106, carry out heat exchange with the air of current transformer inside, absorb the entrained heat of air of current transformer inside, then from the second liquid cooling heat exchanger liquid outlet, flow out, by evaporator inlet, entering evaporator 101, and carry out heat exchange with same cold-producing medium in this evaporator 101 in evaporator 101, thereby the entrained heat of this second cooling fluid is passed to cold-producing medium; Finally, by the cold-producing medium that carries out and the heat exchange between the first cooling fluid, the heat of current transformer inner air is delivered to current transformer outside in condenser 103.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improvement and conversion all should belong to the protection range of the utility model claims.
Claims (7)
1. the cooling system of a current transformer, described current transformer comprises heater element, described cooling system is for dispelling the heat to described heater element, it is characterized in that, described cooling system comprises input duct (401), fluid pipeline (402), the first liquid cooling apparatus (20) and the second liquid cooling apparatus (10);
Described the first liquid cooling apparatus (20) comprises liquid cooling heat radiator (201); This liquid cooling heat radiator (201) has liquid cooling heat radiator inlet and liquid cooling heat radiator liquid outlet; Described the second liquid cooling apparatus (10) comprises condenser (103), evaporator (101) and compressor (102); Described condenser (103), described evaporator (101) and described compressor (102) connect into the first loop by pipeline; In this first loop, be provided with cold-producing medium; Described condenser (103) has condenser inlet and condenser liquid outlet;
Described liquid cooling heat radiator inlet and described condenser inlet are communicated with described input duct (401) respectively; Described liquid cooling heat radiator liquid outlet and described condenser liquid outlet are communicated with described fluid pipeline (402) respectively.
2. the cooling system of current transformer according to claim 1, is characterized in that, described the second liquid cooling apparatus (10) also comprises evaporator fan, and this evaporator fan is connected with described evaporator (101) by wind chamber.
3. the cooling system of current transformer according to claim 1, it is characterized in that, described the second liquid cooling apparatus (10) also comprises the first liquid cooling heat exchanger (105), described the first liquid cooling heat exchanger (105) has the first liquid cooling heat exchanger inlet and the first liquid cooling heat exchanger liquid outlet, and described evaporator (101) has evaporator inlet and evaporator liquid outlet;
Described evaporator inlet is communicated with described input duct (401), and described evaporator liquid outlet is communicated with described the first liquid cooling heat exchanger inlet, and described the first liquid cooling heat exchanger liquid outlet is communicated with described fluid pipeline (402).
4. the cooling system of current transformer according to claim 1, is characterized in that, described the second liquid cooling apparatus (10) also comprises the first pump (104), the second liquid cooling heat exchanger (106); This second liquid cooling heat exchanger (106) has the second liquid cooling heat exchanger inlet and the second liquid cooling heat exchanger liquid outlet, and described evaporator (101) has evaporator inlet and evaporator liquid outlet;
Described evaporator liquid outlet is communicated with the pump inlet of described the first pump (104), the pump liquid outlet of described the first pump (104) is communicated with described the second liquid cooling heat exchanger inlet, described the second liquid cooling heat exchanger liquid outlet is communicated with described evaporator inlet, thereby forms the second loop; In described the second loop, be provided with the second cooling fluid.
5. according to the cooling system of the current transformer described in claim 1-4 any one, it is characterized in that, described cooling system also comprises external heat exchanger (30) and the cooling fluid supply device (40) that is arranged on described current transformer outside; Described external heat exchanger (30) has external heat exchanger inlet and external heat exchanger liquid outlet, and described cooling fluid supply device (40) has cooling fluid supply device inlet and cooling fluid supply device liquid outlet;
Described fluid pipeline (402) is communicated with described external heat exchanger inlet, and described external heat exchanger liquid outlet is communicated with described cooling fluid supply device inlet, and described cooling fluid supply device liquid outlet is communicated with described input duct (401);
In described fluid pipeline (402), described input duct (401), described external heat exchanger (30), described cooling fluid supply device (40) and the passage that is interconnected thereof, be provided with the first cooling fluid.
6. the cooling system of current transformer according to claim 5, is characterized in that, described cooling fluid supply device (40) comprises that being used to described the first cooling fluid to move provides the second pump of power.
7. according to the cooling system of the current transformer described in claim 1-4 any one, it is characterized in that, described heater element comprises IGBT heater element, inductor, capacitor, copper bar, contactor, circuit breaker, fuse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320602407.2U CN203445772U (en) | 2013-09-27 | 2013-09-27 | Cooling system for converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320602407.2U CN203445772U (en) | 2013-09-27 | 2013-09-27 | Cooling system for converter |
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| Publication Number | Publication Date |
|---|---|
| CN203445772U true CN203445772U (en) | 2014-02-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320602407.2U Withdrawn - After Issue CN203445772U (en) | 2013-09-27 | 2013-09-27 | Cooling system for converter |
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| Country | Link |
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| CN (1) | CN203445772U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103490597A (en) * | 2013-09-27 | 2014-01-01 | 深圳市禾望电气有限公司 | Cooling system of converter |
| CN106558974A (en) * | 2015-09-16 | 2017-04-05 | 刘春林 | The special dedusting heat abstractor of novel electric appliance (converter) |
| US10554086B2 (en) * | 2016-09-06 | 2020-02-04 | Andritz Hydro Gmbh | Method for cooling the rotor of an electric generator |
| CN113597197A (en) * | 2021-06-17 | 2021-11-02 | 东方电气风电有限公司 | Converter heat pipe cooling system |
-
2013
- 2013-09-27 CN CN201320602407.2U patent/CN203445772U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103490597A (en) * | 2013-09-27 | 2014-01-01 | 深圳市禾望电气有限公司 | Cooling system of converter |
| CN103490597B (en) * | 2013-09-27 | 2016-08-17 | 深圳市禾望电气股份有限公司 | A kind of cooling system of current transformer |
| CN106558974A (en) * | 2015-09-16 | 2017-04-05 | 刘春林 | The special dedusting heat abstractor of novel electric appliance (converter) |
| US10554086B2 (en) * | 2016-09-06 | 2020-02-04 | Andritz Hydro Gmbh | Method for cooling the rotor of an electric generator |
| CN113597197A (en) * | 2021-06-17 | 2021-11-02 | 东方电气风电有限公司 | Converter heat pipe cooling system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHENZHEN HOPEWIND ELECTRIC CO., LTD. Free format text: FORMER NAME: SHENZHEN HEWANG ELECTRIC CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 518055 Guangdong city in Shenzhen Province, Nanshan District, Xili Town Dragon Village Second Industrial Zone 5 Patentee after: Shenzhen's standing grain hopes electric limited company Address before: 518055 Guangdong city in Shenzhen Province, Nanshan District, Xili Town Dragon Village Second Industrial Zone 5 Patentee before: Shenzhen Hewang Electric Co., Ltd. |
|
| CP02 | Change in the address of a patent holder |
Address after: 518055 Guangdong city of Shenzhen province Nanshan District Xili town village official Liuzhou Industrial Zone No. 5 Building second layer 1-3 Patentee after: Shenzhen's standing grain hopes electric limited company Address before: 518055 Guangdong city in Shenzhen Province, Nanshan District, Xili Town Dragon Village Second Industrial Zone 5 Patentee before: Shenzhen's standing grain hopes electric limited company |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20140219 Effective date of abandoning: 20160817 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |