CN201757838U - Welding machine cooling blower control circuit - Google Patents
Welding machine cooling blower control circuit Download PDFInfo
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- CN201757838U CN201757838U CN2010200564730U CN201020056473U CN201757838U CN 201757838 U CN201757838 U CN 201757838U CN 2010200564730 U CN2010200564730 U CN 2010200564730U CN 201020056473 U CN201020056473 U CN 201020056473U CN 201757838 U CN201757838 U CN 201757838U
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- welding machine
- control circuit
- relay
- circuit
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Abstract
The utility model provides a welding machine cooling blower control circuit, comprising a current detection circuit, an air blower control circuit, a welding machine, and an air blower, the output signal of the welding machine is transmitted to the air blower successively via the current detection circuit and the air blower control circuit; the air blower control circuit comprises a power supply input terminal CN1, a control signal input terminal CN2, an output terminal CN3, a direct current voltage stabilizing circuit, a relay, and a control chip, the power supply input terminal CN2 is connected with the direct current voltage stabilizing circuit, the direct current voltage stabilizing circuit is connected with the relay, the relay is connected with the control chip, a switch circuit is disposed between the relay and the control signal input terminal CN2, the welding machine cooling blower control circuit is advantageous in that the air blower control circuit is increased, the circuit is not only simple, but can also realize synchronous work of the air blower and the welding machine, on the premise of ensuring normal work of the welding machine, realize low power consumption standby of welding machine, and reduce dust that enters into welding machine.
Description
Technical field
The utility model relates to welding machine, especially with the supporting cooling blower of welding machine, mainly is the control circuit that changes cooling blower, the purpose that cooling blower is cooperated with welding machine.
Background technology
In the prior art, welding machine and blower fan are directly also together, the control circuit that does not add on the blower fan, and the welding machine of use cooling blower, the on time blower fan is being worked always, and blower fan is also worked when not using.No matter whether welding machine is using, and blower fan is all being worked always, increases power consumption and dust and enters.
The utility model content
Technical problem to be solved in the utility model provides a kind of welding machine cooling blower control circuit, makes the cooling blower work that matches with welding machine, synchronouss working with welding machine, saves electric weight.
For solving the problems of the technologies described above, the technical solution of the utility model is: a kind of welding machine cooling blower control circuit, comprise current detection circuit, draught fan control circuit, welding machine, blower fan, the output signal of described welding machine is successively by being sent to blower fan behind current detection circuit, the draught fan control circuit; Described draught fan control circuit comprises power input CN1, signal input end CN2, output terminal CN3, direct current regulation circuit, relay, control chip, described power input CN1 is connected with direct current regulation circuit, described direct current regulation circuit is connected with relay, described relay is connected with control chip, is provided with on-off circuit between described relay and the signal input end CN2.The electric current of welding machine is monitored by current detection circuit, when welding machine does not have output current, current detection circuit goes out a high level, the relay of draught fan control circuit is not worked, blower fan is running not, and when welding machine had output, current detection circuit went out a low level, the relay work of draught fan control circuit, the blower fan running; The output current of welding machine is 0 o'clock, and output is high level by low transition, triggers the control chip timer then, and control chip will the time delayed turn-off blower fan.
As improvement, described on-off circuit comprises two triode Q2, the Q3 of series connection successively, described signal input end CN2 is connected with the base stage of triode Q2, the emitter of described triode Q2 is connected with the base stage of triode Q3, and the collector of described triode Q3 is connected with relay by backward dioded D4.
As improvement, described control chip is LM555N, and its clock signal pins is successively by being connected with the collector of triode Q3 behind monostable circuit, the diode D3.
As improvement, be provided with triode Q1 between described control chip and the relay, the R pin of control chip is connected with the base stage of triode Q1, and the collector of triode Q1 is connected with relay.
As improvement, described current detection circuit comprises current sensor, follower U10A, the sign-changing amplifier U11B that connects successively, comparer U11A, and the output terminal of described comparer U11A is connected with signal input end CN2.
The beneficial effect that the utility model is compared with prior art brought is:
Increased the control circuit of blower fan, this circuit not only circuit is simple, and can realize that blower fan synchronouss working with welding machine, guarantees under the prerequisite of welding machine operate as normal, realizes the welding machine low-power consumption standby, reduces dust and enters in the welding machine.
Description of drawings
Fig. 1 is current detection circuit figure;
Fig. 2 is draught fan control circuit figure.
Embodiment
The utility model is described in further detail below in conjunction with Figure of description.
As shown in Figure 2, a kind of welding machine cooling blower control circuit comprises current detection circuit, draught fan control circuit, welding machine, blower fan.Described draught fan control circuit comprises power input CN1, signal input end CN2, output terminal CN3, direct current regulation circuit, relay J 1, control chip LM555N.Described power input CN1 external AC power supply, described power input CN1 is connected with direct current regulation circuit, and alternating current becomes galvanic current through behind the direct current regulation circuit, and powers to relay J 1 by output terminal B1-2.Be provided with triode Q1 between described control chip LM555N and the relay J 1, the R pin of control chip LM555N is connected with the base stage of triode Q1, and the collector of triode Q1 is connected with relay.Being provided with on-off circuit between described relay J 1 and the signal input end CN2 is connected, described on-off circuit comprises two once triode Q2, the Q3 of series connection, described signal input end CN2 is connected with the base stage of triode Q2, the emitter of described triode Q2 is connected with the base stage of triode Q3, and the collector of described triode Q3 is connected with relay by backward dioded D4.The clock signal pin THR of described control chip LM555N is connected with the collector of triode Q3 behind the crystal oscillating circuit formed of electric capacity E2, the E3 by being connected in parallel, E4, the forward diode D3 successively.
As shown in Figure 1, described current detection circuit comprises current sensor, follower U10A, the sign-changing amplifier U11B that connects successively, comparer U11A.The output of current sensor is connected with the input pin 3 of follower U10A; The input pin 1 of follower U10A is connected with output pin 7 with the input pin 6 of sign-changing amplifier U11B; The output pin 1 of sign-changing amplifier U11B is connected with the input pin 3 of comparer U11A, and the output pin 1 of described comparer U11A is connected with signal input end CN2.
The principle of work of current detection circuit is as follows:
Current sensor senses is to the electric current of welding machine, and current feedback is oppositely amplified through sign-changing amplifier U11B by follower U10A, is added to comparer U11A output.When current sensor senses when electric current is arranged, follower U10A input pin 3 just has voltage, oppositely amplify through sign-changing amplifier U11B, sign-changing amplifier U11B output pin 7 obtains negative voltage, at this moment the voltage ratio input pin 2 of comparer U11A input pin 3 is low, its output pin 1 output negative voltage.During comparer U11A output negative voltage, D4 carries and ends, and is the D4 cathode voltage low level, and because of signal input end CN2 is connected with draught fan control circuit, being equivalent to the control end of draught fan control circuit is low level; When current sensor senses when not having electric current, follower U10A input pin 3 voltages are very for a short time to be about 0, sign-changing amplifier U11B output pin 7 voltages are very for a short time to be about 0, at this moment the voltage of comparer U11A input pin 3 by under the effect of pull-up resistor R39 than the voltage height of input pin 2, its output pin 1 output positive voltage.During comparer U11A output positive voltage, the D4 conducting is the D4 cathode voltage high level, and because of signal input end CN2 is connected with blower fan control control circuit, being equivalent to the control end of draught fan control circuit is high level.
The principle of work of draught fan control circuit is as follows:
By power input CN1 input ac power, the one tunnel powers by output terminal B1-2 fan control circuit after diode VZ1, electric capacity E1 voltage stabilizing.When signal input end CN2 no current was imported, triode Q1, Q2, Q3 ended, and relay J 1 electric current useless passes through, and relay J 1 not make contact disconnects, and the blower fan loop is disconnected, and blower fan is not worked; When signal input end CN2 had the electric current input, triode Q1 ended, triode Q2, Q3 conducting, and diode D4 conducting, relay J 1 gets electric work, and closed in the blower fan loop, blower fan work; When detecting signal input end CN2 and become low level saltus step by high level, triode Q3 ends, and the timer of control chip LM555N is triggered, triode Q1 conducting, relay J 1 work, blower fan work; In addition, triode Q1 ON time is the time of E2, E3, E4 electric capacity charging, E2, E3, when the E4 total capacitance is 440uF, 270K, about 12 minutes of delay time.
The electric current of welding machine is monitored by current detection circuit, when welding machine does not have output current, current detection circuit goes out a high level, the relay of draught fan control circuit is not worked, blower fan is running not, and when welding machine had output, current detection circuit went out a low level, the relay work of draught fan control circuit, the blower fan running; The output current of welding machine is 0 o'clock, and output is high level by low transition, triggers the control chip timer then, and control chip will the time delayed turn-off blower fan.
Claims (5)
1. a welding machine cooling blower control circuit comprises current detection circuit, draught fan control circuit, welding machine, blower fan, and the output signal of described welding machine is successively by being sent to blower fan behind current detection circuit, the draught fan control circuit; It is characterized in that: described draught fan control circuit comprises power input CN1, signal input end CN2, output terminal CN3, direct current regulation circuit, relay, control chip, described power input CN1 is connected with direct current regulation circuit, described direct current regulation circuit is connected with relay, described relay is connected with control chip, is provided with on-off circuit between described relay and the signal input end CN2.
2. a kind of welding machine cooling blower control circuit according to claim 1, it is characterized in that: described on-off circuit comprises two triode Q2, the Q3 of series connection successively, described signal input end CN2 is connected with the base stage of triode Q2, the emitter of described triode Q2 is connected with the base stage of triode Q3, and the collector of described triode Q3 is connected with relay by backward dioded D4.
3. a kind of welding machine cooling blower control circuit according to claim 2, it is characterized in that: described control chip is LM555N, its clock signal pins is successively by being connected with the collector of triode Q3 behind monostable circuit, the diode D3.
4. a kind of welding machine cooling blower control circuit according to claim 3, it is characterized in that: be provided with triode Q1 between described control chip and the relay, the R pin of control chip is connected with the base stage of triode Q1, and the collector of triode Q1 is connected with relay.
5. a kind of welding machine cooling blower control circuit according to claim 1, it is characterized in that: described current detection circuit comprises current sensor, follower U10A, the sign-changing amplifier U11B that connects successively, comparer U11A, the output terminal of described comparer U11A is connected with signal input end CN2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200564730U CN201757838U (en) | 2010-01-13 | 2010-01-13 | Welding machine cooling blower control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200564730U CN201757838U (en) | 2010-01-13 | 2010-01-13 | Welding machine cooling blower control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201757838U true CN201757838U (en) | 2011-03-09 |
Family
ID=43645122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010200564730U Expired - Lifetime CN201757838U (en) | 2010-01-13 | 2010-01-13 | Welding machine cooling blower control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201757838U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966584A (en) * | 2012-11-23 | 2013-03-13 | 安徽鑫龙电器股份有限公司 | Control method of soft starter heat radiation fan |
| US20210219469A1 (en) * | 2019-04-29 | 2021-07-15 | The Esab Group, Inc. | Power Supply Fan Management |
| WO2022166256A1 (en) * | 2021-02-05 | 2022-08-11 | 浙江中剑科技股份有限公司 | Battery charger cooling fan control circuit and charger |
-
2010
- 2010-01-13 CN CN2010200564730U patent/CN201757838U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966584A (en) * | 2012-11-23 | 2013-03-13 | 安徽鑫龙电器股份有限公司 | Control method of soft starter heat radiation fan |
| CN102966584B (en) * | 2012-11-23 | 2016-08-03 | 安徽中电兴发与鑫龙科技股份有限公司 | A kind of control method of soft starter heat radiation fan |
| US20210219469A1 (en) * | 2019-04-29 | 2021-07-15 | The Esab Group, Inc. | Power Supply Fan Management |
| US11758701B2 (en) * | 2019-04-29 | 2023-09-12 | The Esab Group, Inc. | Power supply fan management |
| WO2022166256A1 (en) * | 2021-02-05 | 2022-08-11 | 浙江中剑科技股份有限公司 | Battery charger cooling fan control circuit and charger |
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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 | ||
| CP02 | Change in the address of a patent holder |
Address after: Pingshan Qing Lan Shenzhen Guangdong province 518126 City Road No. 3 Patentee after: Shenzhen Jasic Technology Co., Ltd. Address before: 518126, Guangdong, Baoan District, Xixiang province Shenzhen Street Hengfeng Industrial City C2 Building 1, 2, 3, 4, West and 5, West and C4, building 5 Patentee before: Shenzhen Jasic Technology Co., Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110309 |