阅读说明：本技术 一种汽车后挡风玻璃快速除雾的装置 (Device of quick defogging of windshield behind car ) 是由 刘瑜 于 2019-11-04 设计创作，主要内容包括：公开一种汽车后挡风玻璃快速除雾的装置,包括与后档玻璃的除雾电源连接的除雾风扇,所述的除雾风扇内部设置延时控制器,电机和电热丝,所述的电机的轴端设置风叶；所述的后挡风玻璃电源连接除雾保险丝,所述的除雾保险丝连接除雾开关,所述的除雾开关根据除雾按键打开或者关闭；所述的除雾风扇设置在所述的后挡风玻璃的侧下方,当所述的除雾风扇开启时,所述的除雾风扇的出风可以覆盖所述的后挡风玻璃的大部分面积。该方案可以快速解决秋冬季节里汽车后挡风玻璃容易起雾的问题,迅速消除交通安全隐患。(The device comprises a demisting fan connected with a demisting power supply of the rear windshield, wherein a time delay controller, a motor and an electric heating wire are arranged in the demisting fan, and fan blades are arranged at the shaft end of the motor; the power supply of the rear windshield is connected with a defogging fuse, the defogging fuse is connected with a defogging switch, and the defogging switch is turned on or turned off according to a defogging key; the defogging fan is arranged below the side of the rear windshield, and when the defogging fan is started, the air outlet of the defogging fan can cover most of the area of the rear windshield. The scheme can quickly solve the problem that the rear windshield of the automobile is easy to fog in autumn and winter, and rapidly eliminates the potential safety hazard of traffic.)

1. The utility model provides a device of quick defogging of windshield behind car which characterized in that: the defogging fan is internally provided with a time delay controller, a motor and an electric heating wire, and the shaft end of the motor is provided with a fan blade; the defogging power supply is connected with a defogging fuse, the defogging fuse is connected with a defogging switch, and the defogging switch is turned on or turned off according to the defogging key; the defogging fan is arranged below the side of the rear windshield, and when the defogging fan is started, the air outlet of the defogging fan can cover most of the area of the rear windshield.

2. The delay controller is provided with a capacitor C connected with the defogging power supply, the other end of the capacitor C is grounded through a resistor R and is connected with a gate pole of an MOS tube Q, a source electrode of the MOS tube Q is grounded, a drain electrode of the MOS tube Q is connected with a coil of a relay K, two ends of the coil of the relay K are connected with a freewheeling diode D in parallel, the other end of the coil of the relay K is connected with the defogging power supply, one end of a contact of the relay Q is connected with the heating wire and the motor, the other end of the contact of the relay Q is grounded, and the heating wire is connected with the defogging power supply.

Technical Field

The patent relates to a device of quick defogging of windshield behind car belongs to the car electrical apparatus field.

Background

In autumn and winter, the rear windshield of the automobile is very easy to fog. After the fog appears, the driver can not see the situation of the rear vehicle clearly, and hidden troubles are buried for safe driving. In order to prevent fogging, a standard configuration of an automobile is to attach a wire-like heating film to a rear windshield and remove the fogging with heat. This approach has two drawbacks: first, after the heating film is damaged, it is very difficult to maintain because it is too thin and thin; secondly, after the automobile is sold, the explosion-proof film can be attached to the rear windshield, and the explosion-proof film can be foamed and damaged by the heat of the heating film.

Disclosure of Invention

To above-mentioned problem, this patent adopts the device of the quick defogging of car rear windshield, drives away fog with hot-blast, has that the defogging is fast, easy maintenance, does not hinder the advantage of rupture membrane.

The technical scheme adopted by the patent for solving the technical problem is as follows:

a device for quickly demisting a rear windshield of an automobile comprises a demisting fan connected with a demisting power supply of the rear windshield, wherein a time delay controller, a motor and an electric heating wire are arranged in the demisting fan, and fan blades are arranged at the shaft end of the motor; the defogging power supply is connected with a defogging fuse, the defogging fuse is connected with a defogging switch, and the defogging switch is turned on or turned off according to the defogging key; the defogging fan is arranged below the side of the rear windshield, and when the defogging fan is started, the air outlet of the defogging fan can cover most of the area of the rear windshield.

The delay controller is provided with a capacitor C connected with the defogging power supply, the other end of the capacitor C is grounded through a resistor R and is connected with a gate pole of an MOS tube Q, a source electrode of the MOS tube Q is grounded, a drain electrode of the MOS tube Q is connected with a coil of a relay K, two ends of the coil of the relay K are connected with a freewheeling diode D in parallel, the other end of the coil of the relay K is connected with the defogging power supply, one end of a contact of the relay Q is connected with the heating wire and the motor, the other end of the contact of the relay Q is grounded, and the heating wire is connected with the defogging power supply.

The beneficial effect of this patent mainly shows: 1. the fog is removed by hot air, and the defogging speed is high; 2. has the advantages of easy maintenance and no damage to the explosion-proof membrane.

Drawings

FIG. 1 is an external view of a defogging fan;

fig. 2 is a circuit schematic of the delay controller.

Detailed Description

The invention is further described below with reference to the accompanying drawings:

referring to fig. 1 and 2, in order to solve the problem that the rear windshield of the automobile is easy to fog in autumn and winter and affects safe driving, the proposal provides the device for quickly demisting the rear windshield of the automobile. The scheme comprises a demisting fan connected with a demisting power supply of rear windshield, wherein a time delay controller, a motor 2 and an electric heating wire 1 are arranged in the demisting fan, and fan blades are arranged at the shaft end of the motor 2. When the defogging power supply is connected with the power supply, the defogging fan starts to work and supplies air to the outside; the electric heating wire 1 can heat air, so that the demisting fan sends hot air outwards.

The delay controller is used for delaying and cutting off the power supply to the motor 2 and the heating wire 1, and makes up the defect that the additional equipment cannot form defogging effect feedback. The delay controller is provided with a capacitor C connected with the defogging power supply, the other end of the capacitor C is grounded through a resistor R and is connected with a gate pole of an MOS tube Q, a source electrode of the MOS tube Q is grounded, a drain electrode of the MOS tube Q is connected with a coil of a relay K, two ends of the coil of the relay K are connected with a freewheeling diode D in parallel, the other end of the coil of the relay K is connected with the defogging power supply, one end of a contact of the relay Q is connected with the heating wire 1 and the motor 2, the other end of the contact of the relay Q is grounded, and the heating wire 1 is connected with the defogging power supply. When the defogging power supply is electrified, the capacitor C is charged, and the relay Q is controlled by voltage to close the relay K, so that the motor 2 and the heating wire 1 are electrified to work; after a period of time, the voltage on the capacitor C is reduced due to the discharging action of the resistor R, and finally the relay Q is turned off, and the relay K disconnects the energizing loop of the motor 2 and the heating wire 1.

The defogging switch is opened or closed according to the defogging key. The defogging fuse is used for ensuring the electricity utilization safety, and if a short circuit occurs or the current is too large, the defogging fuse is automatically fused to prevent accidents; the front end of the defogging fuse is provided with a defogging switch, and a defogging key is additionally arranged, so that when fog appears on the rear windshield, a driver can press the defogging switch, and a master control computer of an automobile is turned on and the defogging switch supplies power to the defogging fan.

In order to achieve the best defogging effect, the defogging fan is arranged below the side of the rear windshield, when the defogging fan is started, the air outlet of the defogging fan can cover most of the area of the rear windshield, and therefore most of fog on the rear windshield can be removed rapidly.