CN202082083U - Air volume control device for automotive air conditioning blower - Google Patents

Abstract

The utility model particularly relates to a speed regulating module for an automotive air conditioning blower. An air volume control device for the automotive air conditioning blower is characterized in that an operation loop of the automotive air conditioning blower comprises an air conditioning controller, a blower motor and a speed regulating module FET (field effect transistor), and the model of the FET is IRFP064. A drain electrode (G electrode) of the speed regulating module FET is connected with an input end of the air conditioning controller, a grid electrode (D electrode) of the FET is connected with a feedback end of the air conditioning controller, and a source electrode (S electrode) of the FET is grounded. High-speed relays and control ports can be saved since the air volume control device is controlled by the FET, and thereby chip resources and extra electrical parts are saved, and cost is reduced. Simultaneously, communication level of the air volume control device is controlled by the FET through voltage regulation, stepless speed regulation of air volume of the air conditioning blower is guaranteed, and the control method is more convenient and stable.

Description

The blower for vehicle air conditioning air quantity controller

Technical field

The utility model belongs to the air conditioner for automobile technical field, is specifically related to a kind of blower for vehicle air conditioning speed adjusting module.

Background technique

The blower for vehicle air conditioning speed adjusting module is one of critical component in the sedan system, and according to the needs of different automobile types, the type of its selection is also different.Speed adjusting module can be divided into three types: resistance (Resistance) formula, PTR triode (Power Transistor) formula, FET field effect transistor (Field Effect Transistor) formula.The resistance type module only is applicable to the blower speed governing of static stall, and the stepless speed regulation of realization blower need be used PTR or FET.

At present, the speed adjusting module that generally use in the car air conditioner field is PTR, though PTR can finish the stepless speed regulation task, but because the restriction of self semiconductor internal structure, can not satisfy the requirement of blower speed governing fully, as: during high tap position, blower voltage should be supply voltage (about 12V), use the PTR speed governing, high tap position blower voltage is the highest only can reach about 10.5V.So, for guaranteeing blower top gear voltage (12V), need extra attached the electricity piece---relay that increases, control cost thereby increase.

Along with the continuous maturation of semiconductor technology, a kind of novel high power valve (MOSFET field effect transistor) begins to be applied to the automobile air conditioning technology field.High-performance power MOSFET (claiming HEXFET again) has characteristics such as low on-resistance, low-loss, fast, the big electric current of switching speed.The application of MOSFET can solve the inconvenience that brought when in the past using PTR, reduces the number of control wiring, increases operational reliability, reduces system cost.

This speed adjusting module is applied to match with automobile air conditioner control panel in the blower for vehicle air conditioning alignment circuit, realizes the stepless speed regulation of blower.

The model utility content

Stepless time adjustment at existing sedan air conditioner blower air quantity, the demand of durable reliability, the utility model have been designed a kind of novel air conditioner blower speed control principle, adopt a kind of novel high power valve (MOSFET), replace original PTR triode (Power Transistor)

The concrete design proposal of the utility model is as follows:

The blower for vehicle air conditioning air quantity controller, in blower for vehicle air conditioning work loop, comprise air-conditioner controller, blower motor and speed adjusting module FET field effect transistor, improvement is: the drain electrode of described speed adjusting module FET field effect transistor (the G utmost point) connects the input end of air-conditioner controller, the grid of FET field effect transistor (the D utmost point) connects the feedback end of air-conditioner controller, the source electrode of FET field effect transistor (the S utmost point) ground connection, air-conditioner controller is by the voltage Vgs of control FET field effect transistor source electrode and drain electrode, change the conducting degree of speed adjusting module FET field effect transistor, the voltage of control blower motor, thereby the air quantity of control blower;

The model of described speed adjusting module FET field effect transistor is IRFP064.

The control of the utility model air conditioner blower, promptly FET compares with PTR control, and FET control can be saved fast-acting relay and control port, thereby saves resources of chip and additional electrical part, reduces cost; Simultaneously, FET is by its conducting degree of Regulation Control, and this control mode is more convenient, and is stable, reliable.

Both guarantee the stepless time adjustment of air conditioner blower air quantity, saved the overall cost of air-conditioning system again.

Description of drawings

Fig. 1 is the utility model circuit control principle figure.

Fig. 2 is prior art circuits control principle figure.

Embodiment

Below by concrete enforcement also in conjunction with the accompanying drawings, the utility model is described in further detail.

Embodiment:

Referring to Fig. 1, the blower for vehicle air conditioning air quantity controller comprises air-conditioner controller 2 in blower for vehicle air conditioning work loop, blower motor 4 and speed adjusting module FET field effect transistor 3, and the model of FET field effect transistor is for being IRFP064.The drain electrode of described speed adjusting module FET field effect transistor (the G utmost point) connects the input end of air-conditioner controller, and the grid of FET field effect transistor (the D utmost point) connects the feedback end of air-conditioner controller, the source electrode of FET field effect transistor (the S utmost point) ground connection.

Referring to Fig. 2, former air conditioner blower air quantity control principle:

Vm is a blower motor voltage among the figure, and Vce is the PTR pressure drop, Vm=12V – Vce;

Air-conditioner controller (HTR CONTROL) is by change PTR base stage (the B utmost point) voltage, thereby the conducting degree of change PTR changes Vce, thereby changes Vm, reaches blower stepless speed regulation order ground;

When blower requires high speed operation, when being Vm ≈ 12V, because during the complete conducting of PTR, its conduction voltage drop Vce is about 1.5V, can't satisfy guaranteeing the blower high speed operation, therefore, increase fast-acting relay, make its blower directly by working behind the fast-acting relay, thereby reach the purpose that runs up of blower.

Referring to Fig. 1, air-conditioning blower air quantity control principle:

Vm is a blower motor voltage among the figure, and Vgs is the FET pressure drop, Vm=12V – Vgs;

Air-conditioner controller (HTR CONTROL) is by change FET grid (GATE) voltage, thereby the conducting degree of change FET changes Vgs, thereby changes Vm, reaches blower stepless speed regulation order ground;

When being set at high speed operation, the complete conducting of FET, its conduction voltage drop Vgs is about 0.3V, is similar to no pressure drop loss, so can guarantee the blower high speed operation fully.

Adopt the control of air-conditioning blower, promptly FET compares with PTR control, and FET control can be saved fast-acting relay and control port, thereby saves resources of chip and additional electrical part, reduces cost; Simultaneously, FET is by its conducting degree of Regulation Control, and this control mode is more convenient, and is stable, reliable.

Claims (1)

1. the blower for vehicle air conditioning air quantity controller comprises air-conditioner controller in blower for vehicle air conditioning work loop, blower motor and speed adjusting module FET field effect transistor; It is characterized in that: the drain electrode of described speed adjusting module FET field effect transistor connects the input end of air-conditioner controller, the grid of FET field effect transistor connects the feedback end of air-conditioner controller, the source ground of FET field effect transistor, air-conditioner controller is by the voltage Vgs of control FET field effect transistor source electrode and drain electrode, change the conducting degree of speed adjusting module FET field effect transistor, the voltage of control blower motor, thereby the air quantity of control blower;

The model of described speed adjusting module FET field effect transistor is IRFP064.

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