JPH02270628A - Car air purifier - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to switching on and off of a power supply for an air cleaner installed in an automobile.

BACKGROUND OF THE INVENTION Conventionally, in-vehicle air purifiers installed in automobiles have been equipped with a power switch on the main body of the air purifier, which can be turned on and off by the user whenever necessary. In addition, power is supplied from the vehicle's accessory power line, and the power is turned on only when the engine key is placed in the accessory (hereinafter referred to as "CC") position or the 'ON' position.

Problems to be Solved by the Invention However, with the above-described configuration, if the driver forgets to turn off the power switch of the air purifier and the car runs out, the battery will be over-discharged, making it impossible to restart the engine. Another problem is that wiring work such as wiring under the floor is required in order to conduct the wiring so that the power is supplied at the "CC" or "ON" position.

In view of the above problems, the present invention prevents over-discharging of a battery,
Furthermore, the present invention provides an on-vehicle air cleaner that can simplify wiring work during installation.

Means for Solving the Problems In order to achieve this object, the in-vehicle air cleaner of the present invention comprises a pulsating current detection circuit of a battery fin and a main power switching device that is opened and closed by a signal from the pulsating current detection circuit. It is configured.

Furthermore, the pulsating flow detection circuit detects the pulsating flow for several seconds (1~
The main power switchgear is configured to operate after the entire confirmation period (10 seconds) has elapsed.

Effect: With this configuration, when there is pulsating current in the battery line,
That is, the air purifier operates only when the engine rotates, the generator rotates, AC voltage is generated, and then rectified by the rectifying element. This makes it possible to prevent over-discharging of the battery. Furthermore, since the pulsating current detection circuit has the entire confirmation period, single pulse or single time disturbance signals can be excluded, thereby preventing malfunctions.

EXAMPLE An example of the present invention will be described below with reference to the drawings.

In Figure 1, 1 is an alternating current generator rotated by the engine, 2 is a voltage regulator that keeps the generated voltage constant, and 3
is a rectifying element that converts all AC to direct current.

4 is a battery, and 16 is a battery line, which distributes power to each electrical component. 6 is a capacitor that blocks direct current and allows all ripple current to pass; 8, 7, and 8.17 are resistors; 9 is a comparator; 10 is a rectifying diode; 11 is a smoothing capacitor; 12 is a microprocessor.

13 is a power supply circuit for a pulsating current detection circuit and a holding power supply for the microprocessor 12; 14 is a main power switch device, which is a transistor; 16 is another electric circuit of the air purifier.

The operation of the in-vehicle air purifier configured as above will be described below.

First, when the engine is stopped and the generator 1 is also stopped, the DC voltage generated in the battery 4 appears on the battery line 16. Meanwhile, the engine rotates and generator 1
When the battery rotates, a pulsating current (approximately 0.1 to 0.2 [V]) flows through the battery line 16 after being rectified by the rectifier 3.
rides.

The capacitor 5 then applies the pulsating current of the battery line 16 to one terminal of the comparator 9 .

The voltage from the power supply circuit 13 is connected to the child terminal through the resistor 7. Resistor 8
The partial pressure is applied by Furthermore, resistor 6. One terminal is fully biased by resistor 17. Therefore,
When a pulsating current is applied to one terminal of comparator 9, the output of comparator 9 is inverted and applied to microprocessor 12 via diode 10. The microprocessor 12 operates at a holding voltage, and when a pulsating current detection signal is received.

The transistor of the main power switchgear 14 is made conductive and the operating pressure for the air purifier 16 and microprocessor 12 is supplied.

In addition, the microprocessor 12 has a confirmation period of several seconds (1 to 10 seconds) after the pulsating flow detection circuit detects the pulsating flow, so that it can detect pulses that do not continue, such as single pulses or disturbance signals. This prevents the main power switchgear 14 from operating.

As described above, according to this embodiment, by providing a pulsating current detection circuit and a main power switching device using a signal from the pulsating current detection circuit, the engine can be rotated no matter where in the car one source of the in-vehicle air purifier is wired. The air purifier can only be operated when

Further, by going through a confirmation period, it is possible to completely prevent malfunctions.

Effects of the Invention As described above, the non-invention is to install an on-vehicle air purifier by including a pulsating current detection circuit in the battery line and a main power switching device that is opened and closed based on the trust from the pulsating current detection circuit. When doing so, you can simply connect the wires to the battery line, eliminating the need for laborious wiring work and also freeing you from worrying about battery over-discharge.

Furthermore, by coating the pulsating current detection circuit with a gold film during the confirmation period, malfunctions can be prevented, which has a great effect.

[Brief explanation of drawings]

The figure is a circuit diagram in one embodiment of the present invention. 411.9. Battery, 1161131. , battery wine, 18... pulsating current detection circuit, 14...
・・Main power switchgear.

Claims (2)

[Claims] (1) An on-vehicle air purifier that receives power from a car battery line, characterized by comprising a battery line pulsating current detection circuit and a main power switching device that is opened and closed by a signal from the pulsating current detection circuit. An in-vehicle air purifier. (2) After the pulsating flow detection circuit detects the pulsating flow, several seconds
2. The vehicle air cleaner according to claim 1, wherein the main power switching device operates after a confirmation period of 10 seconds.