KR970028238A - Malfunction prevention device of fan heater electric pump - Google Patents

Abstract

The present invention relates to a control circuit of a fan heater electric pump, and in particular, an electric pump (30) operated by a predetermined control signal to inject fuel; An electronic pump power supply control circuit section 20 connected to the electron pump 30 for applying power to the electron pump 30 by a predetermined control signal; An electronic pump driving circuit section (50) switched by a predetermined control signal to switch the electronic pump (30) on / off; An electron pump connected between the electron pump 30 and the electron pump driving circuit unit 50 to detect an operation state of the electron pump 30 and generate a predetermined signal indicating an operation state of the electron pump 30. A malfunction detection circuit unit 40; A first output terminal Q1 for outputting a predetermined control signal for controlling the operation of the electronic pump power supply control circuit unit 20 and a predetermined control signal for controlling the operation of the electronic pump driving circuit unit 50; A second output terminal Q2 and an input terminal IN for receiving a predetermined signal applied from the electronic pump malfunction detection circuit unit 40 are provided, and the electronic pump (2) is provided through the second output terminal Q2. Outputs a predetermined control signal for operating 30, detects an operating state of the electronic pump 30 through the input terminal lN, and states of the second output terminal Q2 and the input terminal IN. According to the present invention, the fan heater electronic pump is characterized in that it comprises a microcomputer 10 for controlling the operation of the electronic pump power control circuit unit 20 by determining whether the power supplied to the electronic pump (30). Malfunction prevention device.

Description

Malfunction prevention device of fan heater electric pump

As this is a public information case, the full text was not included.

1 is a block diagram showing a control circuit of a conventional fan heater electric pump.

2 is a circuit diagram showing a control circuit of a conventional fan heater electric pump.

3 is a block diagram showing the present invention "an apparatus for preventing malfunction of a fan heater electric pump".

Figure 4 is a block diagram showing the present invention "an operation preventing device of the fan heater electric pump".

Claims (5)

An electronic pump operated by a predetermined control signal to inject fuel; An electronic pump power supply control circuit section connected to the electronic pump and supplying power to the electronic pump by a predetermined control signal; An electronic pump driving circuit unit switched by a predetermined control signal to turn on / off the electronic pump; An electron pump malfunction detection circuit portion connected between the electron pump and the electron pump driving circuit portion to detect an operation state of the electron pump and generate a predetermined signal indicating an operation state of the electron pump; A first output terminal for outputting a predetermined control signal for controlling an operation of the electronic pump power supply control circuit part, a second output terminal for outputting a predetermined control signal for controlling an operation of the electronic pump driving circuit part, and the electronic pump It is provided with an input terminal for receiving a predetermined signal applied from the malfunction detection circuit unit, and outputs a predetermined control signal for operating the electronic pump by the second output terminal, the operating state of the electronic pump through the input terminal And a microcomputer for controlling the operation of the electronic pump power control circuit part by determining whether to continuously supply power supplied to the electronic pump according to the state of the second output terminal and the input terminal. Malfunction prevention device of fan heater electric pump. The electronic pump power control circuit of claim 1, further comprising: a first switching device turned on / off according to a control signal output from the first output terminal of the microcomputer; A second switching device for switching between a positive power supply terminal and a ground terminal of the power supply according to the on / off of the first switching element, and always connected to the positive terminal of the power supply to connect the electronic pump to the positive terminal; Device for preventing malfunction of the fan heater electronic pump, characterized in that consisting of elements. The apparatus of claim 2, wherein the second switching element is composed of a relay that is always connected to one terminal thereof. The electronic pump malfunction detection circuit unit is connected between the electronic pump and the electronic pump driving circuit unit, the electronic pump malfunction detection circuit unit is turned on / off in accordance with the on / off of the electronic pump, and the signal for the on / off is generated. An apparatus for preventing malfunction of a fan heater electric pump, characterized in that it comprises a third switching element applied to an input terminal of a microcomputer. 5. The third switching element of claim 4, wherein both terminals of the light emitting portion are connected between the electron pump and the electronic pump driving circuit portion, the emitter terminal of the light receiving portion is connected to the ground point, and the collector terminal of the light receiving portion is positive An apparatus for preventing malfunction of a fan heater electric pump, comprising a photo transistor commonly connected to a power supply terminal and an input terminal of a microcomputer. ※ Note: The disclosure is based on the initial application.