CN112865490A - Heat dissipation device for mining frequency converter - Google Patents
Heat dissipation device for mining frequency converter Download PDFInfo
- Publication number
- CN112865490A CN112865490A CN202011626050.2A CN202011626050A CN112865490A CN 112865490 A CN112865490 A CN 112865490A CN 202011626050 A CN202011626050 A CN 202011626050A CN 112865490 A CN112865490 A CN 112865490A
- Authority
- CN
- China
- Prior art keywords
- heat dissipation
- shell
- frequency converter
- sliding
- impeller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 230000017525 heat dissipation Effects 0.000 title claims abstract description 34
- 238000005065 mining Methods 0.000 title claims abstract description 26
- 238000004140 cleaning Methods 0.000 claims abstract description 40
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910052753 mercury Inorganic materials 0.000 claims abstract description 24
- 229920001821 foam rubber Polymers 0.000 claims 1
- 239000000428 dust Substances 0.000 abstract description 10
- 238000000034 method Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 238000001816 cooling Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/10—Cleaning by methods involving the use of tools characterised by the type of cleaning tool
- B08B1/14—Wipes; Absorbent members, e.g. swabs or sponges
- B08B1/143—Wipes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/30—Cleaning by methods involving the use of tools by movement of cleaning members over a surface
- B08B1/32—Cleaning by methods involving the use of tools by movement of cleaning members over a surface using rotary cleaning members
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
- H05K7/20909—Forced ventilation, e.g. on heat dissipaters coupled to components
- H05K7/20918—Forced ventilation, e.g. on heat dissipaters coupled to components the components being isolated from air flow, e.g. hollow heat sinks, wind tunnels or funnels
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Cleaning In General (AREA)
Abstract
The invention relates to the technical field of heat dissipation equipment, and aims to solve the problem that heat dissipation is affected due to the fact that dust accumulated on a mining frequency converter cannot be cleaned in time in the prior art, and provides a heat dissipation device for the mining frequency converter, which comprises a connecting frame arranged on one side of a shell of the mining frequency converter, wherein a heat dissipation structure is arranged on the connecting frame and comprises an impeller and a driving circuit for driving the impeller to rotate, the driving circuit is provided with a control piece, the control piece comprises a control tube filled with mercury, the mercury is positioned at the bottom of the control tube, the upper part and the bottom of the control tube are respectively connected into the driving circuit, and the mercury is heated and extends to the upper part; the impeller comprises a plurality of blades, cleaning pieces are arranged on the blades, and the cleaning pieces are abutted to the shell.
Description
Technical Field
The invention relates to the technical field of heat dissipation equipment, in particular to a mining frequency converter heat dissipation device.
Background
The frequency converter has been on the market in China for nearly 20 years, and due to the excellent performance and considerable power-saving effect, the frequency converter is widely applied to various industries. The application of the mining frequency converter is later than that of other frequency converters, but the development situation is rapid in the last five years, and the mining frequency converter has the trend of the first of all industries. The most fundamental reason is that the lagging electrical equipment cannot meet the requirement of industrial production, the old equipment has low efficiency and large energy consumption, and the technical problems in the development of the explosion-proof industry are to be solved urgently. Energy conservation, consumption reduction and low carbon emission are objective requirements for social development, and the state pays attention to technical upgrading and transformation of the explosion-proof industry. From the plan of 'eleven five' to the present, the technical development of the explosion-proof industry is changing day by day, and the application of the mining explosion-proof frequency converter is becoming wide.
Because all elements of the existing mining frequency converter are arranged in the explosion-proof type explosion-proof cavity, air cannot flow freely, and the problem of heat dissipation becomes one of the important problems to be solved by the frequency converter. The common heat dissipation of the mining frequency converter at present comprises natural air cooling, heat pipe heat dissipation and water cooling heat dissipation. Although the high-efficiency heat dissipation of the frequency converter can be realized by adopting the heat dissipation modes, the mining frequency converter is in a dust flying condition for a long time in the use environment of the mining frequency converter, dust can be accumulated on the housing of the mining frequency converter and devices such as a heat pipe or a water cooling device, and once the dust is excessively accumulated, the heat dissipation effect can be seriously influenced. In the prior art, workers usually clean the shell, but the workers do not know when the dust on the shell is accumulated too much, so that timely cleaning cannot be carried out.
Disclosure of Invention
The invention aims to provide a mining frequency converter heat dissipation device to solve the problem that heat dissipation is affected due to the fact that dust accumulated on a mining frequency converter cannot be cleaned in time in the prior art.
The basic scheme provided by the invention is as follows: a heat dissipation device for a mining frequency converter comprises a connecting frame arranged on one side of a shell of the frequency converter, wherein a heat dissipation structure is arranged on the connecting frame and comprises an impeller and a driving circuit for driving the impeller to rotate, the driving circuit is provided with a control piece, the control piece comprises a control tube filled with mercury, the mercury is positioned at the bottom of the control tube, the upper part and the bottom of the control tube are respectively connected into the driving circuit, and the mercury is heated and extends to the upper part of the control tube; the impeller comprises a plurality of blades, cleaning pieces are arranged on the blades, and the cleaning pieces are abutted to the shell.
The basic scheme has the working principle and the beneficial effects that: in this scheme, heat dissipation mechanism is used for carrying out the forced air cooling to the converter shell, in mining converter use, the temperature of shell can rise gradually, after the temperature of shell risees, the control is heated, mercury in the control tube is heated and is extended to control tube upper portion, drive circuit just also switches on this moment, so the impeller begins to rotate under drive circuit's drive, the rotation of impeller can accelerate the flow of air current around the shell, thereby take away the radiating heat of shell fast, just also accelerated the radiating efficiency of shell.
Considering that accumulational dust also can influence the heat dissipation of shell on the shell, therefore in this scheme, still be provided with the cleaning piece on the blade, at the impeller pivoted in-process, the cleaning piece moves under the drive of slip end, because the cleaning piece offsets with the shell, consequently can be to clean the shell in the in-process back that the cleaning piece moved, clear up accumulational dust on the shell to guarantee the normal heat dissipation of shell.
Compared with the prior art, in the scheme, through the matching of the arranged blades and the driving circuit, after the temperature of the shell rises, the control part automatically controls the driving circuit to be conducted, the blades rotate, and therefore the shell is cooled;
2. considering that accumulational dust also can influence the heat dissipation on the shell, therefore in this scheme, still be provided with the cleaning piece on the impeller and set up the shell, utilize the rotation of impeller to drive the cleaning piece and clean the shell, need not additionally to set up power spare and drive the cleaning piece, further practiced thrift heat abstractor's cost.
The first preferred scheme is as follows: preferably, the impeller is positioned in the center of the shell, the blade comprises a fixed end and a sliding end, the front end of the fixed end is provided with a sliding chute, and the rear end of the sliding end is in sliding connection with the sliding chute; the front end of the sliding end is provided with a cleaning piece. Has the advantages that: considering that the cleaning member that the shell offseted can influence the shell heat dissipation to a certain extent, however the cleaning member needs to offset with the shell again and just can clean the shell, consequently in order to reduce the influence that the cleaning member led to the fact the shell heat dissipation, just need to reduce the area that cleaning member and shell offseted, and in case the area that cleaning member and shell offseted reduces the back, can't carry out comprehensive cleanness to the one side that offsets with cleaning member on the shell again, consequently, in this scheme, set up the blade and constitute by sliding connection's stiff end and sliding end, so in the blade motion process, the sliding end outwards slides under the effect of centrifugal force, the blade extends gradually, in this process, the cleaning member that sets up on the sliding end is the heliciform motion, thereby clean the shell, guaranteed that the cleaning member can carry out comprehensive cleanness to the shell.
The preferred scheme II is as follows: preferably, as a first preferred scheme, the rear end of the sliding groove is provided with an elastic piece, and the rear end of the sliding end is connected with the elastic piece. Has the advantages that: in this scheme, after the spout sets up the elastic component, when the blade does not rotate, the slip end then retracts the stiff end under the effect of elastic component, then when the blade rotates next time, the blade extends again, and the cleaning member then can follow the outside motion in shell center again, accomplishes the comprehensive cleanness to the shell.
The preferable scheme is three: preferably, as the first preferred embodiment or the second preferred embodiment, the connecting frame is further provided with a limiting frame matched with the shell in shape, and after the sliding end slides out of the fixed end, the front end of the sliding end abuts against the limiting frame. Has the advantages that: considering that the moving track of the cleaning piece is circular after the blade rotates, the shell is not circular generally and is rectangular generally, if the length of the blade is too short, the cleaning piece cannot clean four corners of the shell, and if the length of the blade is too long, the cleaning piece is separated from the shell in a certain period of time in the moving process.
The preferable scheme is four: preferably, the sliding groove is provided with a buffer at both ends. Has the advantages that: in the scheme, the buffer parts are further arranged at the two ends of the sliding groove and used for buffering the impact in order to reduce the impact between the sliding end and the fixed end in the process of extending or retracting the sliding end, so that the impact generated when the sliding end and the fixed end extend or retract is reduced, and the damage caused by the impact to the sliding end and the fixed end is reduced.
The preferable scheme is five: preferably, the cleaning element is a foam pad. Has the advantages that: in view of the fact that the coal mine is relatively wet, the sponge mat capable of absorbing water is adopted as the cleaning piece in the scheme, and the cleaning piece can better clean dust after absorbing moisture in air.
Drawings
Fig. 1 is a front view of a first embodiment of a heat dissipation device of a mining frequency converter according to the present invention;
fig. 2 is a front view of the blade of fig. 1.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the cleaning machine comprises a shell 1, a connecting frame 2, a motor 3, a rotating shaft 4, a blade 5, a fixed end 6, a sliding groove 61, a sliding end 7 and a cleaning piece 71.
Example one
Substantially as shown in figure 1: a heat dissipation device for a mining frequency converter comprises an L-shaped connecting frame 2 arranged on one side of a frequency converter shell 1, in the embodiment, the connecting frame 2 is located on the right side of the shell 1, a heat dissipation structure is arranged on the connecting frame 2 and comprises an impeller and a driving circuit for driving the impeller to rotate, the impeller is located in the center of the shell 1 and comprises a rotating shaft 4 and a plurality of blades 5, a connecting hole is formed in the center of the shell 1, the bottom of the rotating shaft 4 is located in the connecting hole, and the plurality of blades 5 are located in the middle of the rotating shaft 4 and are circumferentially arranged along the outer surface of the rotating shaft 4; blade 5 includes stiff end 6 and slip end 7, and the rear end and the pivot 4 of stiff end 6 are connected, and in this embodiment, stiff end 6 can be dismantled with pivot 4 and be connected, and is concrete, and 4 surfaces of pivot are provided with the draw-in groove, and 6 rear ends of stiff end are provided with the joint portion that matches with the draw-in groove, and stiff end 6 and 4 joints of pivot, in other embodiments, stiff end 6 also can fixed connection with pivot 4.
The front end of stiff end 6 is provided with spout 61, and the both ends of spout 61 are provided with the bolster, and in this embodiment, the bolster is the rubber pad, and the bolster bonds at the both ends of spout 61. The rear end of the sliding groove 61 is provided with an elastic part, the rear end of the sliding end 7 is connected with the sliding groove 61 in a sliding mode, the rear end of the sliding end 7 is connected with the elastic part, in the embodiment, the elastic part is a pressure spring, and the elastic part is fixedly connected with the rear end of the sliding groove 61.
The blade 5 is provided with a cleaning piece 71, specifically, the front end of the sliding end 7 is provided with the cleaning piece 71, the cleaning piece 71 is located on the lower surface of the sliding end 7, and the lower end of the cleaning piece 71 is abutted against the shell 1.
The driving circuit is provided with a power supply, a lead, a motor 3 and a control piece, the power supply, the motor 3 and the control piece are connected through the lead, the motor 3 is positioned on the connecting frame 2, an output shaft of the motor 3 is provided with a bevel gear, and the outer surface of the upper part of the rotating shaft 4 is a conical tooth surface meshed with the bevel gear.
The control piece is including the control tube that is equipped with mercury, and mercury is located the control tube bottom, and during the upper portion and the bottom of control tube inserted drive circuit respectively, mercury is heated the extension and reaches control tube upper portion, and in this embodiment, the control tube is circular pipe, and the material of pipe adopts nonconducting and the strong material of heat conductivity, adopts plastics in this embodiment. The control piece is vertically arranged on the shell 1, the height of the mercury is one half of the height of the control tube, the bottom of the control tube extends into one end with a lead, the position with the height of three-quarter of the control piece extends into one end with the lead, when the control piece is heated, the mercury expands when heated, the height of the mercury rises, and when the height of the mercury reaches three-quarter of the control tube, the lead at the bottom and the upper part of the control piece is simultaneously submerged by the mercury, and the driving circuit is switched on.
The specific implementation process is as follows: in the initial state, the mercury in the control member is at half height of the control tube, the elastic member in the vane 5 is at the original length, and the sliding end 7 is retracted into the fixed end 6 as shown in fig. 2.
In the using process, the temperature of the shell 1 gradually rises, the temperature of the control element arranged on the shell 1 also rises, so that mercury in the control element expands and rises along the control tube, when the mercury height reaches three quarters of the height of the control tube, at the moment, because the conducting wires at the bottom and the upper part of the control tube are simultaneously submerged by mercury, the driving circuit is conducted, and the motor 3 in the driving circuit operates, so that the rotating shaft 4 is driven to rotate.
In the rotating process of the rotating shaft 4, the sliding end 7 gradually extends out of the fixed end 6 under the action of centrifugal force, when the rotating speed of the rotating shaft 4 is low, the sliding distance of the sliding end 7 is short, when the rotating speed of the rotating shaft 4 is high, the sliding distance of the sliding end 7 is long, and when the rear end (the end, away from the rotating shaft 4, of the sliding end 7) of the sliding end 7 slides to the front end of the sliding groove 61, the sliding end 7 does not slide outwards any more, and meanwhile, the elastic piece is in an extending state under the pulling of the sliding end 7. The movement of the sliding end 7 drives the cleaning piece 71 to move on the shell 1, and the cleaning piece 71 wipes the shell 1 to clean the shell 1. Description of the drawings: in this embodiment, the end of the impeller away from the rotating shaft 4 is front, and the end facing the rotating shaft 4 is rear.
When the temperature of the shell 1 is reduced, the temperature of the control element is reduced, the mercury starts to shrink, the height of the mercury is reduced, after the temperature is reduced to below three-fourths, the conducting wires at the bottom and the upper part of the control tube are not conducted any more, the driving circuit is disconnected, the motor 3 stops running, the rotating shaft 4 does not rotate any more, the elastic element starts to shrink until the original length is recovered, and the shrunk elastic element can pull the sliding end 7 to retract to the fixed end 6 until the initial state is recovered.
Example two
The difference from the first embodiment is that in the present embodiment, the connecting frame 2 is further provided with a limiting frame matched with the shape of the housing 1, and after the sliding end 7 slides out of the fixed end 6, the front end of the sliding end 7 abuts against the limiting frame. In this embodiment, taking the rectangular housing 1 as an example, the limiting frame is a rectangular frame.
In this embodiment, after being provided with spacing frame, at the rotation in-process of impeller, slip end 7 receives the effect of centrifugal force and spacing frame's resistance, and the length of blade 5 can be along with the length change on the corresponding limit of spacing frame to make the length of blade 5 the same with corresponding limit length all the time, thereby can clean shell 1 all the time, guaranteed clean effect, and then guaranteed shell 1's radiating effect.
The foregoing is merely an example of the present invention, and common general knowledge in the field of known specific structures and characteristics is not described herein in any greater extent than that known in the art at the filing date or prior to the priority date of the application, so that those skilled in the art can now appreciate that all of the above-described techniques in this field and have the ability to apply routine experimentation before this date can be combined with one or more of the present teachings to complete and implement the present invention, and that certain typical known structures or known methods do not pose any impediments to the implementation of the present invention by those skilled in the art. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (6)
1. The utility model provides a mining converter heat abstractor which characterized in that: the heat dissipation structure comprises an impeller and a driving circuit for driving the impeller to rotate, the driving circuit is provided with a control piece, the control piece comprises a control tube filled with mercury, the mercury is positioned at the bottom of the control tube, the upper part and the bottom of the control tube are respectively connected into the driving circuit, and the mercury is heated and extends to the upper part of the control tube; the impeller comprises a plurality of blades, cleaning pieces are arranged on the blades, and the cleaning pieces are abutted to the outer shell.
2. The mining frequency converter heat dissipation device of claim 1, wherein: the impeller is positioned in the center of the shell, the blade comprises a fixed end and a sliding end, the front end of the fixed end is provided with a sliding groove, and the rear end of the sliding end is in sliding connection with the sliding groove; the front end of the sliding end is provided with a cleaning piece.
3. The mining frequency converter heat dissipation device of claim 2, wherein: the rear end of the sliding groove is provided with an elastic piece, and the rear end of the sliding end is connected with the elastic piece.
4. The mining frequency converter heat dissipation device of claim 2 or 3, wherein: the connecting frame is further provided with a limiting frame matched with the shell in shape, the sliding end slides out of the fixed end, and the front end of the sliding end abuts against the limiting frame.
5. The mining frequency converter heat dissipation device of claim 2, wherein: and buffer parts are arranged at two ends of the sliding groove.
6. The mining frequency converter heat dissipation device of claim 1, wherein: the cleaning element is a foam-rubber cushion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011626050.2A CN112865490A (en) | 2020-12-31 | 2020-12-31 | Heat dissipation device for mining frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011626050.2A CN112865490A (en) | 2020-12-31 | 2020-12-31 | Heat dissipation device for mining frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112865490A true CN112865490A (en) | 2021-05-28 |
Family
ID=75999460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011626050.2A Withdrawn CN112865490A (en) | 2020-12-31 | 2020-12-31 | Heat dissipation device for mining frequency converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112865490A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106391476A (en) * | 2016-11-28 | 2017-02-15 | 新乡市振英机械设备有限公司 | Net cleaning device for horizontal type airflow screen |
| CN107832198A (en) * | 2017-12-15 | 2018-03-23 | 苏州雷目电子科技有限公司 | A kind of computer application software real-time error device |
| CN208175359U (en) * | 2018-04-14 | 2018-12-04 | 连江县金源工业设计有限公司 | Gardens grass trimmer with height adjuster |
| CN109577832A (en) * | 2018-12-13 | 2019-04-05 | 张兵 | A kind of transom having function of temperature control |
| CN211703283U (en) * | 2018-09-29 | 2020-10-20 | 东莞市博华机电设备有限公司 | Livestock-raising cold water machine |
-
2020
- 2020-12-31 CN CN202011626050.2A patent/CN112865490A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106391476A (en) * | 2016-11-28 | 2017-02-15 | 新乡市振英机械设备有限公司 | Net cleaning device for horizontal type airflow screen |
| CN107832198A (en) * | 2017-12-15 | 2018-03-23 | 苏州雷目电子科技有限公司 | A kind of computer application software real-time error device |
| CN208175359U (en) * | 2018-04-14 | 2018-12-04 | 连江县金源工业设计有限公司 | Gardens grass trimmer with height adjuster |
| CN211703283U (en) * | 2018-09-29 | 2020-10-20 | 东莞市博华机电设备有限公司 | Livestock-raising cold water machine |
| CN109577832A (en) * | 2018-12-13 | 2019-04-05 | 张兵 | A kind of transom having function of temperature control |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107774595A (en) | A kind of cleaner for solar panel | |
| CN112090800B (en) | Solar photovoltaic panel cleaning device with self-charging function and cleaning method thereof | |
| CN209767287U (en) | Shock-resistant heat dissipation shell for servo motor | |
| CN209408630U (en) | A kind of dust catcher for printed wiring board target-shooting machine | |
| CN112865490A (en) | Heat dissipation device for mining frequency converter | |
| CN203351619U (en) | Solar energy photovoltaic panel having timing clean function | |
| CN204934077U (en) | A kind of portable computer deduster | |
| CN113794438A (en) | Solar power generation panel waste heat recovery cleaning device and control method | |
| CN214092376U (en) | Hydraulic and electric dual-drive cooling fan | |
| CN210463749U (en) | Cooling mechanism for electromechanical device | |
| CN217842051U (en) | High-speed electromechanical integrated brushless fan | |
| CN211333606U (en) | Inserted sheet hole saw | |
| CN215732997U (en) | Wear-resistant high-voltage cabinet with protection function | |
| CN214945179U (en) | Improved archaized fan mechanical shaking device | |
| CN218654806U (en) | Cement production line crust cleaning device | |
| CN217833546U (en) | Percussion bit that assembled hexagonal handle electric hammer used | |
| CN216937324U (en) | Automatic cleaning device for cooling fins of wind generating set | |
| CN220172696U (en) | Ventilation device for new energy power station | |
| CN110149058A (en) | The vehicle-mounted inverter and radiating dustproof method of heat loss through convection | |
| CN215447267U (en) | Dampproofing treatment facility of hydraulic engineering equipment | |
| CN114560046B (en) | Training equipment recycling platform for improving safety of underwater training | |
| CN215663943U (en) | Vibration reduction type efficient propeller propulsion device for ship | |
| CN108857550A (en) | A kind of scrap cleaning device of numerically controlled lathe | |
| CN218846301U (en) | Ventilation and dust removal device for air conditioner outdoor unit | |
| CN210896312U (en) | Multimedia information issuing machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210528 |