Fan automatic switching circuit for heat dissipation of ATM machine
An automatic switch, ATM machine technology, applied in circuits, electronic switches, electrical components, etc., can solve the problem of inability to automatically control the ambient temperature, and achieve good application prospects, easy implementation, and simple circuits.
Inactive Publication Date: 2017-09-26
SUZHOU KUEN ELECTRONICS TECH
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Problems solved by technology
[0003] The purpose of the present invention is to overcome the problem that the existing fan cannot be automatically controlled according to the ambient temperature
Method used
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[0015] The present invention will be further described below in conjunction with the accompanying drawings of the specification. The following embodiments are only used to illustrate the technical solutions of the present invention more clearly, and cannot be used to limit the protection scope of the present invention.
[0016] Such as figure 1 As shown, the fan automatic switch circuit for ATM machine heat dissipation of the present invention includes a fan M and a battery G. The fan M is connected to the mains through the contact switch of the relay K,
[0017] The positive electrode of the battery G is connected to one end of the sliding varistor RP1 through a resistor R1, the other end of the sliding varistor RP1 is connected to the negative electrode of the battery G through the thermistor RT, and the other end of the sliding varistor RP1 is also connected through a transistor The base of Q1 is connected, the emitter of the transistor Q1 is connected to the emitter of the tra...
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The invention discloses a fan automatic switching circuit for heat dissipation of an ATM machine. The fan automatic switching circuit for heat dissipation of the ATM machine comprises a fan M and a storage battery G; the fan M is connected with commercial power through a contact switch of a relay K; a positive electrode of the storage battery G is connected with one end of a sliding rheostat RP1 through a resistor R1; the other end of the sliding rheostat RP1 is connected with a negative electrode of the storage battery G through a thermistor RT; the other end of the sliding rheostat RP1 is connected with a base electrode of a transistor Q1; the coil of the relay K is driven to switch on or switch off through the transistor Q1 and through cooperation with transistors Q2, Q3 and Q4, so that the fan M can be controlled to work or stop work. When the temperature is too high, the coil of the relay is controlled to switch on through the transistors, and the contact switch is switched on, so that the fan can work normally; and when the temperature is low, the coil of the relay is controlled not to switch on through the transistors, the contact switch is switched off, the fan stops work, the circuit is simple, and the fan automatic switching circuit for heat dissipation of the ATM machine is easy to implement and has a good application prospect.
Description
Technical field [0001] The invention relates to an automatic fan switch circuit for heat dissipation of an ATM machine, belonging to the technical field of automatic control. Background technique [0002] The ATM machine will generate a lot of heat when it works for a long time. It needs to be dissipated in time to ensure its normal operation. At this time, the fan needs to be turned on for heat dissipation. When the ambient temperature of the ATM machine drops, the fan can be turned off. However, At present, the cooling fans of ATM machines are always on, resulting in a waste of energy. How to set up a simple, reliable, low-cost automatic fan switch circuit for ATM machine cooling and automatic control according to the ambient temperature is a current need solved problem. Summary of the invention [0003] The purpose of the present invention is to overcome the problem that the existing fan cannot be automatically controlled according to the ambient temperature. The automatic fa...
Claims
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IPC IPC(8): G05D23/24H03K17/60H03K17/74H03K17/78
CPCH03K17/60H03K17/74H03K17/78G05D23/24
Inventor 杨俊民
Owner SUZHOU KUEN ELECTRONICS TECH