A sensor reference power supply of an automobile air conditioner, the automobile air conditioner and an automobile
By designing a reference power supply for automotive air conditioning sensors and utilizing operational amplifiers and filter circuits, the high cost and redundancy issues in traditional air conditioning controllers were resolved, achieving low-cost, high-precision intelligent control.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU ROTHWELL ELECTRIC
- Filing Date
- 2025-06-30
- Publication Date
- 2026-06-05
AI Technical Summary
Traditional automotive air conditioning controllers use integrated chips that are expensive and have significant functional redundancy, making intelligent control impossible.
Design a sensor reference power supply for automotive air conditioning, utilizing RC and LC filter circuits composed of operational amplifiers, filter capacitors, and resistors, combined with diodes to prevent reverse connection, reducing material costs while maintaining high accuracy and reliability.
Without compromising the accuracy and reliability of the reference power supply, material costs were effectively reduced, enhancing the company's market competitiveness.
Smart Images
Figure CN224328368U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of power control, specifically, it relates to a sensor reference power supply for an automotive air conditioner, an automotive air conditioner, and an automotive. Background Technology
[0002] With the development of the times and technology, automobiles have become increasingly convenient for people's lives, and the demand for intelligent vehicles is also increasing. Among these, air conditioning is an indispensable part of achieving intelligent vehicles. Traditional automotive air conditioning controllers mainly control heating, cooling, and airflow by adjusting the damper with a pull wire, which cannot achieve intelligent control. To ensure the accuracy of sensors, existing air conditioning controllers often use integrated chips to provide a 5V reference voltage for air conditioning-related sensors. These dedicated chips are often very expensive and have significant functional redundancy. Utility Model Content
[0003] This application provides a sensor reference power supply for an automotive air conditioner, an automotive air conditioner, and an automotive vehicle, which can effectively reduce the cost of the air conditioner controller, thereby increasing the company's market competitiveness without compromising product quality.
[0004] In a first aspect, embodiments of this application provide a sensor reference power supply for an automotive air conditioner, comprising: an operational amplifier, wherein the positive input pin of the operational amplifier is connected to one end of a first resistor, the other end of the first resistor is connected to a 5V power supply and one end of a first filter capacitor, and the other end of the first filter capacitor is grounded; the negative input pin of the operational amplifier is connected to one end of a second resistor, the other end of the second resistor is connected to the cathode of a diode; the positive power supply pin of the operational amplifier is connected to a 12V power supply and one end of a second filter capacitor, the other end of the second filter capacitor is grounded; the negative power supply pin of the operational amplifier is grounded; the output pin of the operational amplifier is connected to one end of a third resistor, the other end of the third resistor is connected to the anode of a diode, the cathode of the diode is connected to the other end of the second resistor and one end of an inductor, the other end of the inductor is connected to one end of a third filter capacitor, and the other end of the third filter capacitor is grounded.
[0005] The first resistor and the first filter capacitor form an RC filter circuit.
[0006] The operational amplifier is an integrated circuit operational amplifier.
[0007] Secondly, this application provides an automotive air conditioner, including a sensor reference power supply for the automotive air conditioner described in any of the above claims.
[0008] Thirdly, this application provides a vehicle including a sensor reference power supply for the vehicle air conditioning system described in any of the above claims.
[0009] The sensor reference power supply, automotive air conditioner, and automotive vehicle of the embodiments described in this application have the following beneficial effects:
[0010] To address the issues of high chip cost and significant functional redundancy in existing automotive air conditioning controllers, this application provides a sensor reference power supply design method. This technology can effectively reduce material costs without compromising the accuracy and reliability of the reference power supply, thereby increasing the market competitiveness of enterprises. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the sensor reference power supply structure for an automotive air conditioner according to an embodiment of this application. Detailed Implementation
[0012] The present application will be further described below with reference to the accompanying drawings and embodiments.
[0013] In the following description, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The following description provides multiple embodiments of the present invention, which can be substituted or combined with each other. Therefore, this application can also be considered to include all possible combinations of the same and / or different embodiments described. Thus, if one embodiment includes features A, B, and C, and another embodiment includes features B and D, then this application should also be considered to include embodiments containing one or more other possible combinations of features A, B, C, and D, even if such embodiments are not explicitly described in the following text.
[0014] like Figure 1 As shown, the sensor reference power supply for the automotive air conditioning system of this application includes an operational amplifier 5. The positive input pin of the operational amplifier 5 is connected to one end of a first resistor 3. The other end of the first resistor 3 is connected to a 5V power supply and one end of a first filter capacitor 4, the other end of which is grounded. The negative input pin of the operational amplifier 5 is connected to one end of a second resistor 2. The other end of the second resistor 2 is connected to the cathode of a diode 7. The positive power supply pin of the operational amplifier 5 is connected to a 12V power supply and one end of a second filter capacitor 1, the other end of which is grounded. The negative power supply pin of the operational amplifier 5 is grounded. The output pin of the operational amplifier 5 is connected to one end of a third resistor 6. The other end of the third resistor 6 is connected to the anode of a diode 7. The cathode of the diode 7 is connected to the other end of the second resistor 2 and one end of an inductor 8. The other end of the inductor 8 is connected to one end of a third filter capacitor 9, the other end of which is grounded.
[0015] like Figure 1As shown, the second filter capacitor 1 is a 12V power supply filter capacitor; VCC_5V (power supply voltage) is the MCU analog reference power supply. The first resistor 3 and the first filter capacitor 4 form an RC filter circuit, which supplies power to the positive input pin of the remote computing amplifier 5. The negative input pin of the remote computing amplifier 5 connects the reference voltage between diode 7 and inductor 8 through the second resistor 2; the third resistor 6 is a current-limiting resistor for the output of the remote computing amplifier 5, used to control the output current capability of the reference power supply. Diode 7 is used for reverse connection protection to prevent external output short circuit to the positive terminal of the vehicle power supply, which could damage the remote computing amplifier 5. Inductor 8 and the third filter capacitor 9 form an LC filter circuit to ensure stable sensor reference power supply output. In some embodiments, the operational amplifier is an integrated circuit remote computing amplifier, such as the RS8412XK.
[0016] To address the issues of high chip cost and significant functional redundancy in existing automotive air conditioning controllers, this application provides a low-cost, high-precision, and high-reliability sensor reference power supply design. This technology can effectively reduce material costs without compromising the accuracy and reliability of the reference power supply, thereby enhancing the market competitiveness of enterprises.
[0017] This application also provides an automotive air conditioner, including a sensor reference power supply for any of the above-mentioned automotive air conditioners.
[0018] This application also provides a vehicle including a sensor reference power supply for any of the above-mentioned vehicle air conditioning systems.
[0019] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A sensor reference power supply for an automotive air conditioner, characterized in that, The system includes an operational amplifier. The positive input pin of the operational amplifier is connected to one end of a first resistor, the other end of which is connected to a 5V power supply and one end of a first filter capacitor, the other end of which is grounded. The negative input pin of the operational amplifier is connected to one end of a second resistor, the other end of which is connected to the cathode of a diode. The positive power supply pin of the operational amplifier is connected to a 12V power supply and one end of a second filter capacitor, the other end of which is grounded. The negative power supply pin of the operational amplifier is grounded. The output pin of the operational amplifier is connected to one end of a third resistor, the other end of which is connected to the anode of a diode. The cathode of the diode is connected to the other end of the second resistor and one end of an inductor, the other end of which is connected to one end of a third filter capacitor, the other end of which is grounded.
2. The sensor reference power supply for the automotive air conditioner according to claim 1, characterized in that, The first resistor and the first filter capacitor form an RC filter circuit.
3. The sensor reference power supply for the automotive air conditioner according to claim 1 or 2, characterized in that, The operational amplifier is an integrated circuit operational amplifier.
4. An automotive air conditioner, characterized in that, Includes the sensor reference power supply for the automotive air conditioning system as described in any one of claims 1-3.
5. A car, characterized in that, Includes the sensor reference power supply for the automotive air conditioning system as described in any one of claims 1-3.