CN203730366U - Fan control circuit and electronic device - Google Patents
Fan control circuit and electronic device Download PDFInfo
- Publication number
- CN203730366U CN203730366U CN201420106490.9U CN201420106490U CN203730366U CN 203730366 U CN203730366 U CN 203730366U CN 201420106490 U CN201420106490 U CN 201420106490U CN 203730366 U CN203730366 U CN 203730366U
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- CN
- China
- Prior art keywords
- control circuit
- terminals
- thermal switch
- contactor
- fan control
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Abstract
The utility model discloses a fan control circuit and an electronic device. The fan control circuit comprises a unit control board, a drive board, a contactor KM1 and a temperature switch G. The unit control board is connected with the drive board through a signal wire. The drive board is provided with a terminal P1 and a terminal P2. The drive board controls on and off of the terminals P1 and P2. Two ends of a main contact of the contactor KM1 are connected to a fan and an alternating current power source respectively. Two ends of an auxiliary contact of the contactor KM1 are both connected to the unit control board; the unit control board acquires on-off states of the auxiliary contact. The temperature switch G is a normally closed temperature switch. The temperature switch G, the terminal P1, the terminal P2 and a coil of a relay KM1 are serially connected in order and are then connected between phase and zero wires of the alternating current power source. The fan control circuit has the advantages that strong and weak currents are isolated effectively, a converter can meet the safety requirements, the unit control board is protected, and potential safety hazards are eliminated.
Description
Technical field
The utility model relates to electronic equipment, relates in particular to a kind of draught fan control circuit and electronic equipment.
Background technique
Frequency variator, blower fan is installed on the electronic equipments such as inverter, conventionally by 230V～400V ac power supply, blower fan is powered, D2D160-BE02-14 type centrifugal blower such as German ebmpapst company, this type of blower fan inside is provided with thermal switch, this thermal switch for producing on-off action when blower fan excess Temperature, by driving plate, according to this on-off action, controlled again the power-up state of blower fan, avoid damaging blower fan because of excess Temperature, limited by the size of blower fan inner space, creep age distance between thermal switch lead-in wire and fan power lead-in wire is 2.0mm only, with regard to frequency variator, the standard 220V voltage of frequency variator and the electric clearance between ground wire and creep age distance require to reach 3.0mm, therefore, when this type of blower fan is applied to frequency variator equipment, draught fan control circuit has been proposed to high requirement.
Existing draught fan control circuit, as shown in Figure 2, the phase line L of ac power supply and zero line N are connected in the port CN1 of unit controls plate 1, for providing power supply to unit controls plate 1, the two ends of thermal switch G are directly connected in terminal S1 and the terminal COM of unit controls plate 1, this thermal switch G is used for producing on-off action when the excess Temperature of blower fan 3, and by unit controls plate 1, gathered the on off operating mode of this thermal switch G, between unit controls plate 1 and driving plate 2, by signaling line, be connected, during blower fan 3 initialization, unit controls plate 1 sends control command to driving plate 2, driving plate 2 is carried out this control command and is made terminals P 1 and terminals P 2 conductings, now, coil (the A1 of contactor KM1, A2) power on, the main contact (1 of contactor KM1, 2), (3, 4), (5, 6) adhesive respectively, electric operation on blower fan 3, when the excess Temperature of blower fan 3, temperature transducer G produces on-off action, this make-and-break signal directly transfers to unit controls plate 1, unit controls plate 1 sends halt instruction to driving plate 2, driving plate 2 carries out this halt instruction control terminal P1 and terminals P 2 disconnects, the coil power down of contactor KMI, blower fan 3 shuts down.
In foregoing circuit, creep age distance between thermal switch G lead-in wire and blower fan 3 lead-in wires is less, thermal switch G lead-in wire connects low voltage, and blower fan 3 lead-in wires connect high voltage, can not meet electric clearance and the creep age distance of frequency variator equipment, especially on blower fan 3 during electric operation, if affected by temperature or other factors, cause decreasing insulating or disappearance, the forceful electric power voltage of blower fan 3 will transfer to unit controls plate 1 by thermal switch G, because unit controls plate 1 is realized signals collecting and signal processing with low-potential direct voltage conventionally, so, this forceful electric power voltage causes voltge surge to unit controls plate 1, not only can impairment unit control panel 1, also there is potential safety hazard, make frequency variator equipment can not meet safety requirement.
Model utility content
The technical problems to be solved in the utility model is, in prior art, blower fan inner lead is difficult to meet the deficiency that safety requires, and a kind of draught fan control circuit that strong, weak electricity can be kept apart and electronic equipment are provided.
For solving the problems of the technologies described above, the utility model adopts following technological scheme.
A kind of draught fan control circuit, it includes unit controls plate, driving plate, contactor KM1 and thermal switch G, between described unit controls plate and driving plate, by signaling line, be connected, described driving plate is provided with terminals P 1 and terminals P 2, and by driving plate, controlled the break-make of this terminals P 1 and terminals P 2, the two ends of described contactor KM1 main contact are connected to blower fan and ac power supply, the two ends of described contactor KM1 auxiliary contact are all connected in unit controls plate, and by unit controls plate, gathered the on off operating mode of these auxiliary contact, described thermal switch G is normal close type thermal switch, described thermal switch G, terminals P 1, the coil of terminals P 2 and relay K M1 is connected in after connecting successively between the phase line and zero line of ac power supply.
Preferably, described thermal switch G is arranged at described blower fan inside.
Preferably, described contactor KM1 auxiliary contact are normally closed switch.
Preferably, described thermal switch G is bimetallic strip thermal switch.
An electronic equipment, includes blower fan and above-mentioned draught fan control circuit.
Preferably, described electronic equipment is frequency variator or inverter.
The utility model beneficial effect is compared to existing technologies; because thermal switch G is connected between driving plate and phase line; and the electric pressure of terminals P 1, terminals P 2 is also higher; so; between thermal switch G lead-in wire and blower fan lead-in wire, be equipotential relation; even if the creep age distance of two kinds of lead-in wires is nearer; can not cause any voltge surge to unit controls plate yet; this draught fan control circuit is effectively isolated strong, weak electricity; make frequency variator equipment meet safety requirement; not only protect unit controls plate, and eliminated potential safety hazard.
Accompanying drawing explanation
Fig. 1 is the circuit block diagram of the utility model draught fan control circuit.
Fig. 2 is the circuit block diagram of existing draught fan control circuit.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in more detail.
The utility model discloses a kind of draught fan control circuit, this draught fan control circuit can be applied to frequency variator, inverter etc. with the electronic equipment of blower fan.As shown in Figure 1, this draught fan control circuit includes unit controls plate 1, driving plate 2, contactor KM1 and thermal switch G, thermal switch G in the present embodiment is arranged at blower fan 3 inside, between unit controls plate 1 and driving plate 2, by signaling line, be connected, driving plate 2 is provided with terminals P 1 and terminals P 2, and by driving plate 2, controlled the break-make of this terminals P 1 and terminals P 2, contactor KM1 main contact (1, 2), (3, 4), (5, 6) two ends are connected to blower fan 3 and ac power supply (L1, L2, L3), contactor KM1 auxiliary contact (13, 14) two ends are all connected in unit controls plate 1, and the on off operating mode that gathers these auxiliary contact by terminal S1 and the terminal COM of unit controls plate 1, thermal switch G is normal close type thermal switch, thermal switch G, terminals P 1, coil (the A1 of terminals P 2 and relay K M1, A2) after series connection, be connected in arbitrary phase line (L3 of ac power supply successively, or L1 or L2) and zero line between.As a kind of optimal way, this thermal switch G is bimetallic strip thermal switch, and contactor KM1 auxiliary contact (13,14) are normally closed switch.
The working principle of above-mentioned draught fan control circuit is: blower fan 3 work are initial, unit controls plate 1 passes through signaling line sending controling instruction to driving plate 2, driving plate 2 is carried out this instruction and control terminal P1, terminals P 2 conductings, now, the phase line of ac power supply (L3), thermal switch G, terminals P 1, terminals P 2, the coil of contactor KM1 and zero line N form loop, the coil of contactor KM1 powers on, and the equal adhesive of its main contact and auxiliary contact, electric operation on blower fan 3, simultaneously, unit controls plate 1 collects the closed state signal of these auxiliary contact, and know that according to this closed state signal this blower fan 3 runs well.When blower fan 3 inside temperatures are when too high, thermal switch G disconnects because of sheet deformation, the coil power down of contactor KM1, and its main contact and auxiliary contact all disconnect, blower fan 3 shuts down, meanwhile, unit controls plate 1 collects the off state signal of these auxiliary contact, thereby sends halt instruction to driving plate 2, by driving plate 2, terminals P 1 and terminals P 2 are disconnected, wait for next time and starting, meanwhile, unit controls plate 1 sends fault prompting.
In above-mentioned draught fan control circuit; because thermal switch G is connected between driving plate 2 and phase line; and the electric pressure of terminals P 1, terminals P 2 is higher; as be AC220V or 380V etc.; so; between thermal switch G lead-in wire and blower fan 3 lead-in wires, be equipotential relation; even if the creep age distance of two kinds of lead-in wires is nearer; can not cause any voltge surge to unit controls plate 1 yet; this draught fan control circuit is effectively isolated strong, weak electricity; make frequency variator equipment meet safety requirement, not only protected unit controls plate 1, and eliminated potential safety hazard.
More than the utility model preferred embodiment just, is not limited to the utility model, all modifications of making in technical scope of the present utility model, is equal to and replaces or improvement etc., all should be included in the scope that the utility model protects.
Claims (6)
1. a draught fan control circuit, it is characterized in that, include unit controls plate (1), driving plate (2), contactor KM1 and thermal switch G, between described unit controls plate (1) and driving plate (2), by signaling line, be connected, described driving plate (2) is provided with terminals P 1 and terminals P 2, and by driving plate (2), controlled the break-make of this terminals P 1 and terminals P 2, described contactor KM1 main contact (1, 2), (3, 4), (5, 6) two ends are connected to blower fan (3) and ac power supply, described contactor KM1 auxiliary contact (13, 14) two ends are all connected in unit controls plate (1), and by unit controls plate (1), gathered the on off operating mode of these auxiliary contact, described thermal switch G is normal close type thermal switch, described thermal switch G, terminals P 1, the coil of terminals P 2 and relay K M1 is connected in after connecting successively between the phase line and zero line of ac power supply.
2. draught fan control circuit as claimed in claim 1, is characterized in that, described thermal switch G is arranged at described blower fan (3) inside.
3. draught fan control circuit as claimed in claim 1, is characterized in that, described contactor KM1 auxiliary contact (13,14) are normally closed switch.
4. draught fan control circuit as claimed in claim 1, is characterized in that, described thermal switch G is bimetallic strip thermal switch.
5. an electronic equipment, is characterized in that, includes the arbitrary described draught fan control circuit of blower fan and claim 1 to 4.
6. electronic equipment as claimed in claim 5, is characterized in that, described electronic equipment is frequency variator or inverter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420106490.9U CN203730366U (en) | 2014-03-10 | 2014-03-10 | Fan control circuit and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420106490.9U CN203730366U (en) | 2014-03-10 | 2014-03-10 | Fan control circuit and electronic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203730366U true CN203730366U (en) | 2014-07-23 |
Family
ID=51200444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420106490.9U Expired - Fee Related CN203730366U (en) | 2014-03-10 | 2014-03-10 | Fan control circuit and electronic device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203730366U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109757089A (en) * | 2019-03-06 | 2019-05-14 | 骆佳晨 | A kind of central server radiator based on big data |
-
2014
- 2014-03-10 CN CN201420106490.9U patent/CN203730366U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109757089A (en) * | 2019-03-06 | 2019-05-14 | 骆佳晨 | A kind of central server radiator based on big data |
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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: 20140723 Termination date: 20210310 |
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| CF01 | Termination of patent right due to non-payment of annual fee |