CN204068648U - Anti-condensation frequency converter - Google Patents
Anti-condensation frequency converter Download PDFInfo
- Publication number
- CN204068648U CN204068648U CN201420334655.8U CN201420334655U CN204068648U CN 204068648 U CN204068648 U CN 204068648U CN 201420334655 U CN201420334655 U CN 201420334655U CN 204068648 U CN204068648 U CN 204068648U
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- China
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- tds
- boiling plate
- detect switch
- electric boiling
- temperature detect
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- General Induction Heating (AREA)
Abstract
A kind of anti-condensation frequency converter, introduce three-phase alternating current, and to after alternating current frequency conversion to motor, comprise: casing and the circuit element being arranged on box house, foregoing circuit element comprises rectification unit again, filter unit, inversion unit and control unit, box house is provided with electric boiling plate and temperature detect switch (TDS), temperature detect switch (TDS) and electric boiling plate are in series, one end of temperature detect switch (TDS) is connected with any phase firewire in above-mentioned three-phase alternating current, the other end of temperature detect switch (TDS) is connected with one end of electric boiling plate, and the other end of electric boiling plate is connected with the zero line in three phase mains.The utility model, by installing electric boiling plate additional, keeps internal temperature all the time higher than dew point temperature, avoids condensation to occur, ensures that frequency converter normally works at low ambient temperatures, also plays the protective effect to inner electric elements.
Description
Technical field
The utility model belongs to converter plant, is a kind of anti-condensation frequency converter specifically.
Background technology
Frequency converter is application converter technique and microelectric technique, controls the electric control appliance of alternating current motor by changing machine operation supply frequency mode.Frequency converter is primarily of compositions such as rectification, filtering, inversion, brake unit, driver element, detecting unit and microprocessing units.Frequency converter does a kind of industrial electric electronic product, its operating ambient temperature generally within the scope of 5 DEG C ~ 40 DEG C, but in the operational environment that in fact frequency converter mostly is high in temperature, dust in air content is many or temperature is low, air moisture capacity is high.
As the winter in Northeast Area of China, the atmospheric temperature of the external environment condition residing for frequency converter is below zero degrees celsius, but frequency converter operationally, inner electric elements have electric current to pass through, after long-time, electric elements produce heat, when frequency converter internal-external temperature difference to a certain extent after, steam in air condenses into the small globule and is attached to frequency converter inside, the each interelement insulating properties of frequency converter is reduced, easily cause the short circuit of frequency converter internal wiring, serious words can damage electric elements or whole equipment.
Utility model content
The utility model will solve condensation problem during continuous firing under the environment of frequency converter below low temperature zero degrees celsius, thus provides a kind of anti-condensation frequency converter.
The technical scheme that the utility model is taked for the technical problem existed in solution known technology is:
Anti-condensation frequency converter of the present utility model, introduce three-phase alternating current, and to after alternating current frequency conversion to motor, comprise: casing and the circuit element being arranged on box house, foregoing circuit element comprises rectification unit again, filter unit, inversion unit and control unit, box house is provided with electric boiling plate and temperature detect switch (TDS), temperature detect switch (TDS) and electric boiling plate are in series, one end of temperature detect switch (TDS) is connected with any phase firewire in above-mentioned three-phase alternating current, the other end of temperature detect switch (TDS) is connected with one end of electric boiling plate, and the other end of electric boiling plate is connected with the zero line in three phase mains.
Described live wire, temperature detect switch (TDS), electric boiling plate and zero line form single-phase loop.
Arrange airflow fan in described casing, the air-out direction of airflow fan is towards electric boiling plate; Airflow fan and temperature detect switch (TDS) and electric heater are in series.
The advantage that the utility model has and good effect are:
Electric boiling plate has been installed additional in anti-condensation frequency converter of the present utility model; when frequency converter runs at low temperatures; temperature detect switch (TDS) closes thus makes electric boiling plate to the air heat in casing; temperature in casing is raised; when temperature is higher than ceiling temperature; temperature detect switch (TDS) is opened automatically; thus stop electric boiling plate work; then box interior temperature is kept to remain at higher than within the scope of one of dew point temperature; occur to avoid condensation; thus ensure that frequency converter normally works at low ambient temperatures, also play the protective effect to inner electric elements.
Accompanying drawing explanation
Fig. 1 is circuit diagram of the present utility model;
Fig. 2 is the circuit diagram of another embodiment of the present utility model.
Embodiment
Composition graphs 1 and Fig. 2 illustrate present embodiment,
As shown in Figure 1, in anti-condensation frequency converter of the present utility model, introduce three-phase alternating current L1, L2, L3, and power to motor M to after alternating current frequency conversion, comprise: casing and the circuit element VFD being arranged on box house, foregoing circuit element comprises rectification unit again, filter unit, inversion unit and control unit (non-technology point of the present utility model, concrete structure illustrates), casing 3 inside is provided with electric boiling plate 2 and temperature detect switch (TDS) 1, temperature detect switch (TDS) 1 and electric boiling plate 2 are in series, one end of temperature detect switch (TDS) and above-mentioned three-phase alternating current L1, L2, any phase firewire in L3 is connected, the other end of temperature detect switch (TDS) 1 is connected with one end of electric boiling plate 2, and the other end of electric boiling plate is connected with the zero line N in three phase mains.
Live wire, temperature detect switch (TDS) 1, electric boiling plate 2 form single-phase loop with zero line, when temperature detect switch (TDS) closes, can form complete operating circuit, make electric boiling plate work.
During frequency converter work, inner electric elements work long hours and produce heat, when working under the environment of frequency converter below zero degrees celsius, temperature difference inside and outside frequency converter casing 3 easily makes the steam of frequency converter inner air condense into the small globule, when the temperature of frequency converter box house reaches the lower limit of temperature detect switch (TDS) 1 design temperature, temperature detect switch (TDS) 1 closes, and electric boiling plate 2 is started working; When the temperature of frequency converter box house to reach on temperature detect switch (TDS) 1 design temperature in limited time, temperature detect switch (TDS) 1 disconnects, and electric boiling plate 2 quits work, and avoids frequency converter internal temperature too high, causes the damage to electric elements.
Temperature detect switch (TDS) can adopt arbitrary current techique of the prior art, realizes controlling the break-make of circuit by variations in temperature.The control program that transducer, the controller of powering with independent current source can be adopted to be combined with each other, also can adopt the relay simply possessing bimetal leaf or many sheet metal structures to complete control in addition.
As shown in Figure 2, arrange airflow fan 4 in casing, the air-out direction of airflow fan is towards electric boiling plate; Airflow fan and temperature detect switch (TDS) and electric heater are in series.Can accelerate the air flowing in casing during airflow fan work, the hot-air after electric boiling plate is heated is circulated to sooner from the region away from electric boiling plate in casing, and the temperature in casing is raised sooner, and order heats up also more steady.
The utility model is by installing electric boiling plate 2 additional; the temperature of frequency converter inner air is raised, keeps internal temperature all the time higher than dew point temperature, avoid condensation to occur; ensure that frequency converter normally works at low ambient temperatures, also play the protective effect to inner electric elements.
Certainly; above-mentioned explanation is not to restriction of the present utility model; the utility model is also not limited in above-mentioned citing, the change that those skilled in the art make in essential scope of the present utility model, remodeling, interpolation or replacement, also should belong to protection range of the present utility model.
Claims (3)
1. an anti-condensation frequency converter, introduce three-phase alternating current, and to after alternating current frequency conversion to motor, comprise: casing and the circuit element being arranged on box house, foregoing circuit element comprises rectification unit again, filter unit, inversion unit and control unit, it is characterized in that: casing (3) inside is provided with electric boiling plate (2) and temperature detect switch (TDS) (1), temperature detect switch (TDS) and electric boiling plate are in series, one end of temperature detect switch (TDS) (1) and above-mentioned three-phase alternating current (L1, L2, L3) any phase firewire in is connected, the other end of temperature detect switch (TDS) (1) is connected with one end of electric boiling plate (2), and the other end of electric boiling plate (2) is connected with the zero line (N) in three phase mains.
2. anti-condensation frequency converter according to claim 1, is characterized in that: live wire, temperature detect switch (TDS) (1), electric boiling plate (2) and zero line form single-phase loop.
3. anti-condensation frequency converter according to claim 1 and 2, is characterized in that: arrange airflow fan (4) in casing (3), and the air-out direction of airflow fan (4) is towards electric boiling plate; Airflow fan (4) is in series with temperature detect switch (TDS) (1) and electric heater (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420334655.8U CN204068648U (en) | 2014-06-23 | 2014-06-23 | Anti-condensation frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420334655.8U CN204068648U (en) | 2014-06-23 | 2014-06-23 | Anti-condensation frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204068648U true CN204068648U (en) | 2014-12-31 |
Family
ID=52210090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420334655.8U Expired - Fee Related CN204068648U (en) | 2014-06-23 | 2014-06-23 | Anti-condensation frequency converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204068648U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105281547A (en) * | 2015-11-13 | 2016-01-27 | 天津瑞能电气有限公司 | Power module with moisture-proof and dehumidifying function, and moisture-proof and dehumidifying method of the same |
| CN106814772A (en) * | 2017-03-24 | 2017-06-09 | 合肥天鹅制冷科技有限公司 | Low temperature electric cabinet automatic heating device |
-
2014
- 2014-06-23 CN CN201420334655.8U patent/CN204068648U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105281547A (en) * | 2015-11-13 | 2016-01-27 | 天津瑞能电气有限公司 | Power module with moisture-proof and dehumidifying function, and moisture-proof and dehumidifying method of the same |
| CN106814772A (en) * | 2017-03-24 | 2017-06-09 | 合肥天鹅制冷科技有限公司 | Low temperature electric cabinet automatic heating device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141231 Termination date: 20150623 |
|
| EXPY | Termination of patent right or utility model |