JPH0613053U - Battery welder / cooling fan automatic stop circuit. - Google Patents

Abstract

(57) [Summary] [Purpose] Due to forgetting to turn off the welding switch of the battery welder, the cooling fan will continue to rotate, causing troubles during overcharging (deep discharging) of the battery and recharging (characteristics of the battery). In addition, it takes a considerable time to change from deep discharge to full charge). [Structure] It is a device that detects and controls the voltage of the battery, detects the magnetism generated in the reactor transformer, and stops the cooling fan at the minimum necessary time without relying on conventional switches.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is a battery-type welding machine (mainly 12V / battery three-piece type (36V) and four-piece type (48V) are available) charged, when welding by electricity of battery, and AC100V It relates to a battery welding machine when performing welding while also charging at.

[0002]

[Prior art]

 The battery welding machine referred to in the present invention is a machine that charges a battery with a charger and squeezes the energy to a proper / required current through a resistor.

High heat is generated in the charger (1) and the welding resistance portion (10) of the machine, and it is necessary to cool this portion.

Conventionally, as a cooling fan for this cooling, a primary side power switch of a charger section and a welding switch of a welding machine section are interlocked or used together, and if this switch is forgotten, the cooling fan will rotate. It was left alone.

Since the current consumption of this cooling fan motor is extremely small, if the switch is forgotten to be turned off, the battery will be completely discharged in about 48 hours to 96 hours, and recharging will take much longer (in case of Depending on the situation, it needed to be charged for a long period of time, and it was inconvenient that the machine could not be used when needed.

[0006]

[Problems to be solved by the device]

 Anyway, it is easy to forget to operate ON / OFF with these switches, so even if you forget to turn off the switch, this invention is a combination of battery terminal voltage, charging timer and magnetism. It is intended to solve the conventional problems.

[0007]

[Means for Solving the Problems]

 The present invention, when charging, when the battery voltage is lower than the setting, rotates the cooling fan from the beginning, and when welding without charging, even if the welding switch is "ON", the cooling fan Does not rotate yet, starts rotating when an arc current flows, and stops when the battery is fully charged, at the time of welding or when the arc current stops, so forget to turn off the switch. Also prevents the battery from discharging.

[0008]

【Example】

 When performing welding work together with charging, when performing auxiliary charging after the last use, when the battery voltage is 36V type, 43.0V to 43.5V (57.5 for 48V type) If it is 58.0V, the cooling fan is stopped, and in this state, the cooling fan (5) does not rotate even if the welding switch (11) is turned "ON". (Because the voltage sensing control unit is operating (2) depending on the battery voltage)

Next, when an arc is generated (12) with the welding rod, the reed switch (9) detects the magnetism generated when a current flows through the reactor transformer (8), and the voltage sensing control unit A signal is input and the power from the battery (6) is sent to the bypass cooling fan circuit for charging (4) to rotate the fan.

At this time, when an arc is generated, the electricity is supplied from the battery, and eventually the battery voltage starts to drop.

When the battery voltage is reduced to 33.5V to 33.0V or less (45.5V to 45.0V in the case of 48V type) by continuously generating an arc, the voltage sensing control unit of the charging circuit. Works.

From this point, the cooling fan flows from the charger (1) to the battery voltage detection control unit to the charging bypass cooling fan circuit (4) to rotate the fan.

When the battery voltage rises to 43.5V (57.5 to V58.0V for the 48V type), the charging timer (3) is switched to, and forcible charging for the required time according to the characteristics of the battery is performed. After that, the cooling fan is stopped at the same time as the charging is completed, and even if the welding switch is left on after that, it does not cause the deep discharge of the battery.

Next, when welding is performed only with charged battery energy, first, even if the welding switch is turned “ON”, the welding resistance portion (10) is still energized at that time and is still cooled. The fan does not rotate.

Next, when the arc is generated only by the electricity of the battery, a current flows in the reactor transformer, and the magnetism generated by the current is detected by the reed switch, and this signal is input to the voltage sensing control unit. , Current flows through the battery power supply bypass / cooling fan circuit (7), and the fan rotates via (4).

When the arc is stopped, the generation of magnetism stops and the reed switch is turned “OFF”, and the cooling fan stops. It is also possible to delay the stop time.

From the above-mentioned mechanism, even if the welding switch is left "ON", the current is not consumed and the battery is not deeply discharged even if it is left for 2-3 months.

[0018]

[Effect of device]

 The present invention has the above-mentioned configuration, and its effects will be described next.

In the conventional method of operating / stopping with a switch, it takes a dozen hours to several days to charge a battery that has been deeply discharged due to forgetting to turn off the switch.

It has been confirmed that by using this method, the energy used other than the arc can be suppressed to the minimum current consumption even during use, and the recovery and restoration of the battery charge after use can be accelerated.

In addition, there is a great deal of significance in that it is possible to use the device without being concerned about deep discharge because it is easy to operate with little consideration for use and the amount of battery liquid is reduced.

[Brief description of drawings]

[0022]

[Figure 1] Cooling fan automatic stop circuit diagram

[Explanation of symbols]

(1) Charger (2) Battery voltage detection controller (3) Forced charging / charging timer (4) Bypass / cooling fan circuit for charging (5) Cooling fan (6) Battery (7) Bypass for battery power supply・ Cooling fan circuit (8) Reactor transformer (9) Lead switch for magnetic detection (10) Welding resistance part (11) Welding switch (12) Arc generation part

Claims (1)

[Scope of utility model registration request] 1. A cooling fan automatic stop circuit, which rotates or stops a cooling fan by sensing a battery voltage or by magnetism generated in a reactor transformer, and operates regardless of a charging switch or a welding switch.