CN105873420B - A kind of independent ventiduct structure of frequency converter - Google Patents
A kind of independent ventiduct structure of frequency converter Download PDFInfo
- Publication number
- CN105873420B CN105873420B CN201610362824.2A CN201610362824A CN105873420B CN 105873420 B CN105873420 B CN 105873420B CN 201610362824 A CN201610362824 A CN 201610362824A CN 105873420 B CN105873420 B CN 105873420B
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- separate cavities
- heat
- air duct
- frequency converter
- middle cover
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
- H05K7/20909—Forced ventilation, e.g. on heat dissipaters coupled to components
- H05K7/20918—Forced ventilation, e.g. on heat dissipaters coupled to components the components being isolated from air flow, e.g. hollow heat sinks, wind tunnels or funnels
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The invention belongs to converter technology fields, a kind of independent ventiduct structure of frequency converter is provided, including housing unit, the control assembly and forced heat-exchanging component being connected in the housing unit, the control assembly includes capacitor board and pcb board, multiple capacitive elements are connected on the capacitor board, the first separate cavities of the pcb board and the second separate cavities that are multiple housing the capacitive element and being extended downwardly along first separate cavities bottom can be housed by being equipped in the housing unit, first separate cavities and second separate cavities are isolated with the forced heat-exchanging component, the forced heat-exchanging component has heat exchanging air duct, the outer wall of second separate cavities is adjacent with the heat exchanging air duct or the outer wall of second separate cavities is located in the heat exchanging air duct；The circuit board that design can solve the problems, such as in existing frequency converter in this way is easy to make moist or dust accumulation.
Description
Technical field
The invention belongs to converter technology field more particularly to a kind of independent ventiduct structures of frequency converter.
Background technology
Frequency converter is a kind of supply core component that electricity consumption or power can be controlled according to the actual demand of machine, high
Energy saving makes frequency converter be widely used in industry-by-industry, and frequency converter is generally connected in outdoor machine, and then its institute
The environment at place is more severe, the problems such as to cause the circuit board in frequency converter often to be caused short circuit by cargo sweat or dust accumulation, together
When in order to ensure the continue working of frequency converter, heat dissipation wind channel is often set in frequency converter, but the setting of heat dissipation wind channel is often held
It is easier that outside moisture or dust are blown on circuit board, and heat dissipation wind channel makes heat dissipation performance drop with the completely isolated meeting of circuit board
It is low, while the overall dimensions of frequency converter can become larger.
Invention content
The purpose of the present invention is to provide a kind of independent ventiduct structures of frequency converter, it is intended to solve in existing frequency converter
Circuit board is easy to make moist or the problem of dust accumulation.
The present invention solves in this way：A kind of independent ventiduct structure of frequency converter, including housing unit, it is connected to the shell
Control assembly in body component and forced heat-exchanging component, the control assembly include capacitor board and pcb board, are connected on the capacitor board
Be connected to multiple capacitive elements, be equipped in the housing unit the first separate cavities that can house the pcb board and it is multiple house it is described
Capacitive element and along the second separate cavities that first separate cavities bottom extends downwardly, first separate cavities and described second every
It is isolated with the forced heat-exchanging component from chamber, the forced heat-exchanging component has heat exchanging air duct, the outer wall of second separate cavities
The outer wall of adjacent with the heat exchanging air duct or described second separate cavities is located in the heat exchanging air duct.
The technique effect that the independent ventiduct structure of frequency converter provided by the invention has compared with the prior art is：Pass through
First separate cavities and the second separate cavities are set in housing unit, and then control assembly and heat exchanging air duct are separated, and then can be with
It avoids moisture or dust when heat exchange from entering and cause short circuit in control assembly, while being equipped with the second separate cavities of capacitive element
Outer wall is adjacent with heat exchanging air duct or the outer wall of the second separate cavities is located in heat exchanging air duct, and then can pass through forced heat-exchanging will
Capacitive element is taken away by the heat of the second isolation cavity outer wall outflow, and heat availability is changed to ensure that, in addition, second isolation
Chamber is arranged around heat exchanging air duct and then can make full use of the space in housing unit ensureing the while of exchanging heat, and avoids
The setting of heat exchanging air duct is so that the volume of frequency converter is excessive.
Description of the drawings
Fig. 1 is the structure broken away view one of the independent ventiduct structure of frequency converter provided in an embodiment of the present invention.
Fig. 2 is the structure broken away view two of the independent ventiduct structure of frequency converter provided in an embodiment of the present invention.
Fig. 3 is the structure chart of the middle cover in frequency converter provided in an embodiment of the present invention.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
It should be noted that when element is referred to as " being fixed on " or " being set to " another element, it can be directly another
On one element or it is connected on another element.When an element is known as " being connected to " another element, it can
To be directly to another element or be indirectly connected on another element.
Only it is relative concept each other it should also be noted that, the orientation term such as left and right, upper and lower in the embodiment of the present invention
Or with the normal operating condition of product be reference, and it should not be regarded as restrictive.
Attached drawing 1 is please referred to shown in Fig. 3, in embodiments of the present invention, provides a kind of independent ventiduct structure of frequency converter, is wrapped
Housing unit 10, the control assembly being connected in housing unit 10 30 and forced heat-exchanging component 20 are included, which includes
Capacitor board 302 and pcb board 301, while multiple capacitive elements 3021 are connected on the capacitor board 302, the capacitive element 3021 is preferred
The maximum component of height on component 30 in order to control, is equipped with the first separate cavities that can house pcb board 301 in the housing unit 10
1022 and multiple the second separate cavities 1023 for housing capacitive element 3021, second separate cavities 1023 are along the first separate cavities 1022
Bottom is downwardly extending, and first separate cavities 1022 and the second separate cavities 1023 are isolated with forced heat-exchanging component 20, Ye Jiqiang
Steam or dust in heat-exchanging component 20 processed etc. cannot be introduced into control assembly 30, but the control assembly 30 and forced heat-exchanging
Not heat-insulated between component 20, the material of the cavity wall of the first separate cavities 1022 and the second separate cavities 1023 is preferably heat-exchange performance instead
The good material of energy, the forced heat-exchanging component 20 include heat exchanging air duct 201, the outer wall and heat exchanging air duct of second separate cavities 1023
201 adjacent or the second separate cavities 1023 outer walls are located in heat exchanging air duct 201, herein, if the quantity of capacitive element 3021 is more,
Second separate cavities, 1023 part is located in heat exchanging air duct 201, and another part is located at the both sides of heat exchanging air duct 201, designs in this way
It can ensure also to make full use of heat exchanging air duct 201 to exchange heat while the space in housing unit 10 makes full use of so that become
The use of frequency device is more lasting, and more efficient.
The independent ventiduct structure of the frequency converter designed above, by the way that 1022 He of the first separate cavities is arranged in housing unit 10
Second separate cavities 1023, and then control assembly 30 and heat exchanging air duct 201 are separated, and then can be to avoid moisture when heat exchange or dust
Enter in control assembly 30 and cause short circuit, at the same be equipped with capacitive element 3021 the second separate cavities 1023 outer wall with change
Hot-flow flue 201 is adjacent or the outer wall of the second separate cavities 1023 is located in heat exchanging air duct 201, and then can pass through forced heat-exchanging will
Capacitive element 3021 is taken away by the heat that 1023 outer wall of the second separate cavities is spread out of, and heat availability is changed to ensure that, in addition, should
Second separate cavities 1023 are arranged around heat exchanging air duct 201 and then can make full use of housing unit ensureing the while of exchanging heat
Space in 10 avoids the setting of heat exchanging air duct 201 so that the volume of frequency converter is excessive.
Specifically, as shown in Figure 1 to Figure 3, in embodiments of the present invention, which includes sequentially connected upper cover
101, middle cover 102 and bottom cover 103 namely the upper cover 101 are connect with middle cover 102, which connect with bottom cover 103, and
Between upper cover 101 and middle cover 102, and waterproof sealing gasket is also associated between middle cover 102 and lower cover, while first isolation
Chamber 1022 and the second separate cavities 1023 are arranged on middle cover 102 namely the control assembly 30 is connected to upper cover 101 and middle cover
Between 102, the 102 preferably rectangular frame like structure of middle cover, first separate cavities 1022 and the second separate cavities in the present embodiment
1023 form namely the recess direction of first separate cavities 1022 and the second separate cavities 1023 in the inner recess of middle cover 102
It is directed toward 103 direction of bottom cover along 101 direction of upper cover, design in this way can ensure that the space in middle cover 102 makes full use of, and avoid frequency conversion
Device it is oversized.
Specifically, as shown in Figure 1 to Figure 3, in embodiments of the present invention, second separate cavities 1023 are along the first separate cavities
1022 bottoms extend downwardly, and multiple second separate cavities 1023 are distributed in the both sides of heat exchanging air duct 201, in the present embodiment,
The quantity of second separate cavities 1023 is preferably two, and two the second separate cavities 1023 are distributed in the two of heat exchanging air duct 201
The side wall of the cavity wall of side or second separate cavities 1023 composition heat exchanging air duct 201, while the cavity wall of the second separate cavities 1023
Material uses the material of high-cooling property, in this way design that can ensure that the heat in the second separate cavities 1023 can quickly give out
It goes, and then ensures the high-efficiency continuous running of frequency converter.
Specifically, as shown in Figure 1 to Figure 3, in embodiments of the present invention, which includes being connected to middle cover
Hot-swappable fans 202 on 102 and heat exchanger 203 corresponding with hot-swappable fans 202, the heat exchanger 203 are connected to control assembly
Between 30 and bottom cover 103, while the hot-swappable fans 202 and heat exchanger 203 are located at the both ends of heat exchanging air duct 201, set in this way
Meter can make hot-swappable fans 202 blow the heat for generating and being transmitted on heat exchanger 203 in control assembly 30 through heat exchanging air duct 201
Go out in frequency converter, and then plays the effect of forced heat-exchanging.
In the present embodiment, as shown in Figure 1 to Figure 3, which preferably concaves along the side of middle cover 102
It falls into and is formed, and the hot-swappable fans 202 are connected to heat exchanging air duct 201 on the port of the side of middle cover 102, the present embodiment
In, which is preferably detachably connected on the port of the heat exchanging air duct 201, and second separate cavities 1023
Cavity wall between hot-swappable fans 202 and heat exchanger 203, can be designed so that in this way in heat exchanger 203 and blow to hot-swappable fans
Further the heat of the cavity wall can be taken away when 202 wind is into the cavity wall for crossing the second separate cavities 1023.
Specifically, as shown in Figure 1 to Figure 3, in embodiments of the present invention, which is preferably tube-axial fan,
And the air-out direction of hot-swappable fans 202 deviates from heat exchanging air duct 201, can ensure continuous negative pressure in heat exchanging air duct 201 in this way, into
And can ensure not have in heat exchanging air duct 201 and heat exchanger 203 dust enter and the efficiency that influences heat exchange, at the same time should
Heat exchanger 203 further includes multiple heat exchange fins 2032 being mutually parallel of face heat exchanging air duct 201, which sets
The efficiency of heat exchange can be increased by setting.
Specifically, as shown in Figure 1 to Figure 3, in embodiments of the present invention, the control assembly 30 further include be connected to first every
From the pcb board 301 in chamber 1022, which is electrically connected with capacitor board 302, and the bottom of second separate cavities 1023 is also
The opening 1024 being connect with pcb board 301 for heat exchanger 203 is offered, while the heat exchanger 203 further includes being arranged in upper end
Connecting plate 2031, transition coordinates between the connecting plate 2031 and opening 1024, and is gone back between connecting plate 2031 and pcb board 301
It is connected with cooling fin, which is preferably the sticky radiating silica gel sheet that adjacent two component links together.
In the present embodiment, as shown in Figure 1 to Figure 3, the pcb board 301 limit is connected to the first separate cavities of middle cover 102
In 1022, the bottom periphery of first separate cavities 1022 is equipped with boss 1025, and being corresponded on the pcb board 301 and capacitor board 302 should
Boss 1025 is equipped with link slot 3011, corresponding with boss 1025 by the link slot 3011, so that pcb board 301 and capacitance
Part 3021 can be easily located by connecting in the first separate cavities 1022 and the second separate cavities 1023
Specifically, as shown in Figure 1 to Figure 3, in embodiments of the present invention, pcb board 301 is corresponded on the side of the upper cover 101
It is further opened with the first heat dissipating grid 1011, while corresponding to capacitive element 3021 on the side of the middle cover 102 and offering the second heat dissipation
Grid 1021, the second heat dissipating grid 1021 are located on the side wall of the second separate cavities 1023, and then the electronics member on the pcb board 301
Part can carry out natural heat dissipation, while the heat exchanger 203 connected by 301 lower section of pcb board by first heat dissipating grid 1011
Carry out mechanical forced heat exchange；The capacitive element 3021 can carry out natural heat dissipation by the second heat dissipating grid 1021, can also pass through
The cavity wall of second separate cavities 1023 carries out auxiliary heat dissipation, can ensure more efficient, the Jin Erke that radiates in entire frequency converter in this way
To ensure the continue working of frequency converter.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (9)
1. a kind of independent ventiduct structure of frequency converter, it is characterised in that：Including housing unit, it is connected in the housing unit
Control assembly and forced heat-exchanging component, the control assembly include capacitor board and pcb board, and multiple electricity are connected on the capacitor board
Hold part, be equipped in the housing unit the first separate cavities that can house the pcb board and it is multiple house the capacitive element and
The second separate cavities extended downwardly along first separate cavities bottom, first separate cavities and second separate cavities with it is described
Forced heat-exchanging component is isolated, and the forced heat-exchanging component has heat exchanging air duct, outer wall and the heat exchange of second separate cavities
Air duct is adjacent or the outer wall of second separate cavities is located in the heat exchanging air duct；The housing unit includes on sequentially connected
Lid, middle cover and bottom cover, and be also respectively connected between the upper cover and the middle cover and between the middle cover and the bottom cover anti-
Water seal washer；First separate cavities and second separate cavities are arranged inside the middle cover, and the middle cover is rectangular box-like
Structure, first separate cavities and second separate cavities are formed in the middle cover sunken inside.
2. the independent ventiduct structure of frequency converter as described in claim 1, it is characterised in that：Second separate cavities are along described
One separate cavities bottom extends vertically downward, and multiple second separate cavities are distributed in the both sides of the heat exchanging air duct.
3. the independent ventiduct structure of frequency converter as claimed in claim 2, it is characterised in that：The forced heat-exchanging component includes connecting
The hot-swappable fans being connected on the middle cover and heat exchanger corresponding with the hot-swappable fans, the hot-swappable fans and the heat exchange
Device is located at the both ends of the heat exchanging air duct.
4. the independent ventiduct structure of frequency converter as claimed in claim 3, it is characterised in that：The heat exchanging air duct is along the middle cover
Side be recessed inwardly to be formed, and the hot-swappable fans are connected to port of the heat exchanging air duct close to the side of the middle cover
On.
5. the independent ventiduct structure of frequency converter as claimed in claim 3, it is characterised in that：The hot-swappable fans are axial-flow type wind
Fan, and the air-out direction of the hot-swappable fans deviates from the heat exchanging air duct, the heat exchanger includes heat exchanging air duct described in face
Multiple heat exchange fins being mutually parallel.
6. such as the independent ventiduct structure of claim 3-5 any one of them frequency converters, it is characterised in that：The pcb board and institute
Capacitor board electrical connection is stated, and second separate cavities bottom is further opened with the opening being connect with the pcb board for the heat exchanger.
7. the independent ventiduct structure of frequency converter as claimed in claim 6, it is characterised in that：The heat exchanger further includes that setting exists
The connecting plate of upper end, transition cooperation, is also connected between the connecting plate and the pcb board between the connecting plate and the opening
There is cooling fin.
8. the independent ventiduct structure of frequency converter as claimed in claim 7, it is characterised in that：Institute is corresponded on the side of the upper cover
It states pcb board and is further opened with the first heat dissipating grid.
9. the independent ventiduct structure of frequency converter as claimed in claim 8, it is characterised in that：Institute is corresponded on the side of the middle cover
It states capacitive element and offers the second heat dissipating grid, second heat dissipating grid is located on the side wall of second separate cavities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610362824.2A CN105873420B (en) | 2016-05-27 | 2016-05-27 | A kind of independent ventiduct structure of frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610362824.2A CN105873420B (en) | 2016-05-27 | 2016-05-27 | A kind of independent ventiduct structure of frequency converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105873420A CN105873420A (en) | 2016-08-17 |
| CN105873420B true CN105873420B (en) | 2018-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610362824.2A Active CN105873420B (en) | 2016-05-27 | 2016-05-27 | A kind of independent ventiduct structure of frequency converter |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106602884B (en) * | 2016-12-13 | 2023-06-09 | 华远电气股份有限公司 | Frequency converter with independent air duct structure and assembling process thereof |
| CN109600018B (en) * | 2017-09-28 | 2021-01-01 | 西门子公司 | Current transformer |
| KR102075415B1 (en) * | 2018-01-29 | 2020-02-11 | 엘에스산전 주식회사 | Device for driving motor |
| CN110336515B (en) * | 2018-03-30 | 2021-12-28 | 瀚德万安(上海)电控制动系统有限公司 | Motor control module, actuator and electromechanical brake device |
| CN112055519A (en) * | 2020-09-21 | 2020-12-08 | 清能德创电气技术（北京）有限公司 | Independent air duct structure of servo driver |
| CN219068051U (en) * | 2022-12-16 | 2023-05-23 | 苏州汇川控制技术有限公司 | Frequency converter core and frequency converter |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202455251U (en) * | 2012-03-08 | 2012-09-26 | 成都希望电子研究所有限公司 | Cooling and dustproof structure of small frequency converter |
| CN103701299A (en) * | 2013-12-10 | 2014-04-02 | 深圳市正弦电气股份有限公司 | Converter |
| DE102014012349A1 (en) * | 2013-09-12 | 2015-03-12 | Sew-Eurodrive Gmbh & Co Kg | cooling arrangement |
| CN204216772U (en) * | 2014-11-18 | 2015-03-18 | 深圳市英威腾电气股份有限公司 | A kind of new type inverter |
| CN205070765U (en) * | 2015-10-27 | 2016-03-02 | 深圳市汇川技术股份有限公司 | Can be at converter of high pollution degree environment use |
| CN105517412A (en) * | 2015-11-26 | 2016-04-20 | 深圳市英威腾电气股份有限公司 | Frequency converter |
| CN205657971U (en) * | 2016-05-27 | 2016-10-19 | 华远电气股份有限公司 | Independent wind channel structure of converter |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203278615U (en) * | 2013-05-22 | 2013-11-06 | Abb技术有限公司 | Power module for middle and high voltage inverter and inverter employing same |
| CN204068667U (en) * | 2014-09-19 | 2014-12-31 | 刘智航 | A kind of frequency converter |
| CN204349767U (en) * | 2014-12-04 | 2015-05-20 | 重庆科川电气有限公司 | Radiating structure of frequency converter |
-
2016
- 2016-05-27 CN CN201610362824.2A patent/CN105873420B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202455251U (en) * | 2012-03-08 | 2012-09-26 | 成都希望电子研究所有限公司 | Cooling and dustproof structure of small frequency converter |
| DE102014012349A1 (en) * | 2013-09-12 | 2015-03-12 | Sew-Eurodrive Gmbh & Co Kg | cooling arrangement |
| CN103701299A (en) * | 2013-12-10 | 2014-04-02 | 深圳市正弦电气股份有限公司 | Converter |
| CN204216772U (en) * | 2014-11-18 | 2015-03-18 | 深圳市英威腾电气股份有限公司 | A kind of new type inverter |
| CN205070765U (en) * | 2015-10-27 | 2016-03-02 | 深圳市汇川技术股份有限公司 | Can be at converter of high pollution degree environment use |
| CN105517412A (en) * | 2015-11-26 | 2016-04-20 | 深圳市英威腾电气股份有限公司 | Frequency converter |
| CN205657971U (en) * | 2016-05-27 | 2016-10-19 | 华远电气股份有限公司 | Independent wind channel structure of converter |
Also Published As
| Publication number | Publication date |
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| CN105873420A (en) | 2016-08-17 |
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