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Automobile air-conditioning system and blower speed regulation controller thereof

A technology of speed control controller and air conditioner controller, which is applied in the direction of AC motor control, control system, output power conversion device, etc. EMI, ease of implementation, average noise reduction effect

Active Publication Date: 2015-09-09
GUANGZHOU AUTOMOBILE GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem that when the blower is driven in the existing PWM mode, the frequent on-off of the high-current drive signal will cause electromagnetic radiation and cause electromagnetic interference to the electromagnetic devices in the car. controller

Method used

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  • Automobile air-conditioning system and blower speed regulation controller thereof
  • Automobile air-conditioning system and blower speed regulation controller thereof
  • Automobile air-conditioning system and blower speed regulation controller thereof

Examples

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Embodiment 1

[0045] This example will specifically explain the speed control controller of the blower provided by the present invention. Such as figure 2 As shown, the speed controller 2 of the blower 1 provided in this example includes the following units: a processing unit 21 and a frequency spreading drive unit 22;

[0046] The processing unit 21 is configured to receive the gear position signal sent by the air conditioner controller 3, generate a gear position control signal according to the gear position signal and send it to the spread spectrum drive unit 22; and send it to the spread spectrum drive unit 22 frequency control signal;

[0047] The spread spectrum drive unit 22 is configured to generate a PWM drive signal according to the gear position control signal and the frequency control signal, and send the PWM drive signal to the drive switch Q1 of the blower 1;

[0048] Wherein, the duty ratio of the PWM driving signal is controlled by the gear position control signal, the fr...

Embodiment 2

[0081] This example will specifically explain the automobile air-conditioning system provided by the present invention.

[0082] Such as Figure 5 As shown, this example provides a specific automobile air conditioning system, including air conditioning controller 3, speed controller 2, blower 1 and power switch Q1;

[0083] The blower 1 and the power switch Q1 are connected in series to the power supply; the input end of the speed controller 2 is connected to the air conditioner controller 3, and the output end is connected to the control end of the power switch Q1; wherein, The speed regulating controller 2 is the speed regulating controller 2 mentioned in the first embodiment above.

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Abstract

In order to solve a problem that when a blower is driven in a PWM manner, frequent switching on / off of a heavy-current driving signal may cause electromagnetic radiation so as to cause electromagnetic interference on electronic devices in an automobile, the invention provides an automobile air-conditioning system and a blower speed regulation controller thereof. The blower speed regulation controller comprises a processing unit and a spread spectrum driving unit. The processing unit is used for receiving a shift signal transmitted from an air conditioner controller, generating a shift control signal according to the shift signal in order to transmit the shift control signal to the spread spectrum driving unit, and transmitting a frequency control signal to the spread spectrum driving unit. The spread spectrum driving unit is used for generating a PWM driving signal according to the shift control signal and the frequency control signal and transmitting the PWM driving signal to a driving switch of the blower. The duty ratio of the PWM driving signal is controlled by a shift control signal and the frequency of the PWM driving signal is controlled by the frequency control signal and fluctuates near the center frequency in a pseudo random signal modulation manner.

Description

technical field [0001] The invention relates to an automobile air-conditioning system, in particular to a speed-regulating controller for controlling the speed of a blower in the automobile air-conditioning system. Background technique [0002] Automobile air conditioner is the abbreviation of automobile indoor air conditioning, which is used to adjust the air parameters such as temperature, humidity, airflow speed and air cleanliness in the car, so as to provide the occupants with a fresh and comfortable environment in the car. The air conditioning system is mainly composed of compressors, blowers, condenser assemblies, evaporators, heaters, cooling pipes, warm air pipes, sensors, air conditioning controllers (that is, air conditioning ECU, ECU is the abbreviation of Electronic Control Unit) and air conditioning control panels, etc. composition. [0003] A blower is a motor-driven fan that draws air in and forces it through an evaporator or heater, cooling or heating the a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P27/08H02M1/44
Inventor 王明明辛聪杨波彭飞梁卓贤刘勇黄少堂
Owner GUANGZHOU AUTOMOBILE GROUP CO LTD
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