Automobile air conditioning system

Abstract

The invention discloses an automobile air conditioning system, which relates to the technical field of automobile air conditioning systems and comprises an air blower, an air conditioning relay, a temperature controller, an electromagnetic clutch, a compressor, a condenser, a condenser rotating speed detection circuit and a power supply circuit, the power circuit, the air blower, the air conditioner relay, the temperature controller, the electromagnetic clutch, the compressor and the condenser are sequentially connected in series. And the condenser rotating speed detection circuit is connected in series with the condenser. According to the scheme, the rotating speed of the condenser fan of the air conditioner can be measured in real time and fed back, then the air conditioner is controlled in real time, temperature operation of the air conditioner is kept, and oil consumption is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile air conditioning system, and particularly relates to an automobile air conditioning system. BACKGROUND

[0002] When the power switch, the windshield switch and the AC switch are opened, the condenser fan and the compressor work, the refrigerant (R134a) flows through the refrigerant circulation of the evaporative core in the air bellow, and the low-temperature liquid refrigerant formed by the compressor, the condenser and the throttle pipe absorbs the heat of the surrounding air to realize refrigeration. However, the long-time work of the air conditioner condenser fan causes the coil to age, the current to increase, the work efficiency to decrease and the oil consumption to increase. SUMMARY

[0003] In view of the above, the present application aims to provide an automobile air conditioning system to solve the aforementioned technical problems.

[0004] The technical scheme adopted by the present application is as follows:

[0005] The present application provides an automobile air conditioning system, which comprises:

[0006] a blower, an air conditioning relay, a temperature controller, an electromagnetic clutch, a compressor, a condenser, a condenser rotating speed detection circuit and a power supply circuit;

[0007] The power supply circuit, the blower, the air conditioning relay, the temperature controller, the electromagnetic clutch, the compressor and the condenser are connected in series.

[0008] The condenser rotating speed detection circuit is connected in series with the condenser.

[0009] Optionally, the condenser rotating speed detection circuit comprises:

[0010] a Hall element;

[0011] a second capacitor and a third capacitor connected in parallel with the Hall element;

[0012] a light emitting diode, a second pull-up resistor and a fourth capacitor connected in series with the Hall element;

[0013] a first pull-up resistor connected in parallel with the Hall element;

[0014] a light emitting diode connected in series with the second capacitor;

[0015] a second potentiometer connected in parallel with the third capacitor;

[0016] A voltage comparator, a positive input end of the voltage comparator is connected with the Hall element, a negative input end of the voltage comparator is connected with the second potentiometer, and an output end of the voltage comparator is between the second pull-up resistor and the fourth capacitor.

[0017] Optionally, the automobile air conditioning system further comprises a blower switch circuit connected in series with the blower.

[0018] Optionally, the blower switch circuit comprises:

[0019] A control circuit;

[0020] A speed regulation resistor connected in parallel with the control circuit.

[0021] Optionally, the automobile air conditioning system further comprises a pressure switch, a first end of the pressure switch is connected in series with the temperature controller;

[0022] A second end of the pressure switch is connected in series with the electromagnetic clutch.

[0023] Optionally, the automobile air conditioning system further comprises a first capacitor connected in parallel with the condenser.

[0024] Optionally, the automobile air conditioning system further comprises a first potentiometer connected in series with the condenser.

[0025] The above scheme of the present application at least has the following beneficial effects:

[0026] The above scheme of the present application comprises: a blower, an air conditioning relay, a temperature controller, an electromagnetic clutch, a compressor, a condenser, a condenser rotating speed detection circuit and a power supply circuit; the power supply circuit, the blower, the air conditioning relay, the temperature controller, the electromagnetic clutch, the compressor and the condenser are connected in series; and the condenser rotating speed detection circuit is connected in series with the condenser. The scheme of the present application can measure the rotating speed of the air conditioner condenser fan in real time, feed back the rotating speed, and then control the air conditioner in real time, reduce oil consumption, maintain the air conditioner temperature operation, and improve the work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0027] To make the purpose, technical scheme and advantages of the present application clearer, the present application will be further described below with reference to the drawings, in which:

[0028] Figure 1 A schematic diagram of the automobile air conditioning system provided by the present application is shown. DETAILED DESCRIPTION

[0029] Embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only, and are used to explain the present application, but cannot be interpreted as a limitation of the present application.

[0030] The present application proposes an embodiment of an automobile air conditioning system, specifically as shown in Figure 1 which comprises:

[0031] A blower 1, an air conditioning relay 21, a temperature controller 2, an electromagnetic clutch 3, a compressor 4, a condenser 5, a condenser rotating speed detection circuit 6 and a power supply circuit 7;

[0032] The power supply circuit 7, the blower 1, the air conditioning relay 21, the temperature controller 2, the electromagnetic clutch 3, the compressor 4 and the condenser 5 are connected in series.

[0033] The condenser rotating speed detection circuit 6 is connected in series with the condenser 5.

[0034] In this embodiment, the blower 1 is connected in series with a blower switch circuit, wherein the blower switch circuit comprises: a control circuit 111; and a speed regulating resistor 112 connected in parallel with the control circuit 111.

[0035] The temperature controller 2 is connected in series with the air conditioning relay 21, and the temperature controller 2 is further connected in series with a pressure switch 8, and the pressure switch 8 is connected in series with the electromagnetic clutch 3.

[0036] The power supply circuit 7 is used to control the current of the blower 1 and the electromagnetic clutch 3, and only when the air conditioning relay 21 and the blower switch circuit are turned on at the same time, the air conditioning system can be turned on.

[0037] The blower switch circuit is used to control the rotating speed of the blower 1, and further control the air volume. The control circuit 111 of the blower switch circuit is provided with a plurality of gear interfaces, including a COM gear, an H gear, an MH gear, an ML gear, a LOW gear and an OFF gear, and the speed regulating resistor 112 is connected with the gear interfaces of the control circuit 111. The speed regulating resistor 112 is composed of a plurality of resistors connected in series, and has different resistance values at different gears, thereby realizing the control of the rotating speed of the blower 1.

[0038] In an alternative embodiment, the speed regulating resistor 112 comprises three resistors connected in series. When the air blower switch circuit is in OFF mode, the air conditioner relay 21 is open, and the air blower 1 is powered off and stopped; when the air blower switch circuit is in L mode, all the three resistors of the speed regulating resistor 112 are connected, the resistance is the largest, and the air volume of the air blower 1 is the smallest; when the air blower switch circuit is in ML mode, two resistors of the speed regulating resistor 112 are connected, the resistance of the speed regulating resistor 112 is in the middle, and the air volume of the air blower 1 is in the middle; when the air blower switch circuit is in MH mode, one resistor of the speed regulating resistor 112 is connected, the resistance of the speed regulating resistor 112 is in the middle, and the air volume of the air blower 1 is in the middle; when the air blower switch circuit is in H mode, all the three resistors of the speed regulating resistor 112 are not connected, the resistance of the speed regulating resistor 112 is the smallest, and the air volume of the air blower 1 is the largest.

[0039] The electromagnetic clutch 3 controls the operation and stop of the compressor 4. Only when the air conditioner relay 21 and the pressure switch 8 are connected at the same time, the compressor 4 can operate.

[0040] In an alternative embodiment, the condenser rotating speed detection circuit 6 comprises:

[0041] a Hall element HG;

[0042] a second capacitor C2 and a third capacitor C3 connected in parallel with the Hall element HG;

[0043] a light emitting diode D, a second pull-up resistor R2 and a fourth capacitor C4 connected in series with the Hall element HG;

[0044] a first pull-up resistor R1 connected in parallel with the Hall element HG;

[0045] a light emitting diode D connected in series with the second capacitor C2;

[0046] a second potentiometer RT2 connected in parallel with the third capacitor C3;

[0047] a voltage comparator U, a positive input end of the voltage comparator U is connected with the Hall element HG, a negative input end of the voltage comparator U is connected with the second potentiometer RT2, and an output end of the voltage comparator U is located between the second pull-up resistor R2 and the fourth capacitor C4.

[0048] In this embodiment, the fan of the condenser 5 is driven to rotate by a motor, a magnetic steel is adhered to the circumference of the rotating shaft of the motor of the condenser 5, and the Hall element HG is arranged on the motor of the fan and outputs a voltage signal according to the rotating speed. When the rotating shaft rotates, the magnetic steel approaches the Hall element HG, and the Hall element HG constantly generates a pulse signal output. The third capacitor C3 and the second capacitor C2 are connected in parallel at the output end of the Hall element HG, and the third capacitor C3 and the second capacitor C2 are used for filtering waveform peaks. After filtering the waveform peaks, the first pull-up resistor R1 and the second pull-up resistor R2 are connected, and the first pull-up resistor R1 and the second pull-up resistor R2 here are current limiting. Then, the positive input end of the voltage comparator U is connected, the output voltage of the Hall element HG is compared with the voltage of the second potentiometer RT2, a high-low level signal output is obtained, and the purpose of detecting the rotating speed of the fan of the condenser 5 is achieved.

[0049] Here, the second potentiometer RT2 is used to set the rotating speed threshold, the position of the second potentiometer RT2 is set, the target rotating speed of the fan of the condenser 5 is obtained, when the actual rotating speed is lower than the target rotating speed, the output voltage of the Hall element HG is higher than the voltage of the reverse input end, the output end of the voltage comparator U outputs a high level, and the controller obtains a signal and controls the RP1 potentiometer to slide downward to increase the rotating speed of the fan. With the increase of the rotating speed, the output voltage of the HG element is lower than the voltage of the reverse input end, the output end of the voltage comparator U outputs a low level, the target rotating speed is reached, the first potentiometer RT1 no longer acts, and the rotating speed adjustment is completed. The value of the rotating speed is displayed on the external display.

[0050] Among them, the fourth capacitor C4 is used for waveform shaping to ensure that a good digital signal is obtained. The light-emitting diode D is convenient for observation, and does not light when the voltage comparator U outputs a high level, and lights when the voltage comparator U outputs a low level.

[0051] In an optional embodiment, the condenser 5 is connected in parallel with the first capacitor C1, and the condenser 5 is connected in series with the first potentiometer RT1.

[0052] In this embodiment, the fan of the condenser 5 is divided by the first potentiometer RT1, the end voltage of the fan motor is adjusted, the rotating speed of the fan is adjusted, the purpose of increasing or reducing the rotating speed of the motor is achieved, and the rotating speed of the motor is prevented from being suddenly changed by the first capacitor C1.

[0053] In summary, the automobile air conditioning system of the above-mentioned embodiments of the application can measure the rotating speed of the fan of the air conditioning condenser in real time, feed back the rotating speed, and then control the air conditioner in real time, reduce fuel consumption, maintain the operation of the air conditioning temperature, and improve the working efficiency.

[0054] If the expression direction is mentioned in the embodiments of the present application, it is based on the relative concept of the embodiments, and in addition, "at least one" means one or more, and "multiple" means two or more. The "and / or" describes the association relationship of the associated objects, which means that there can be three kinds of relationships, for example, A and / or B, which can represent the cases of A existing alone, A and B existing simultaneously, and B existing alone. Wherein A and B can be singular or plural. The character " / " generally represents that the associated objects before and after it are in an "or" relationship. "At least one of the following" and the like means any combination of these items, including any combination of single or multiple items. For example, at least one of a, b and c can represent: a, b, c, a and b, a and c, b and c, or a and b and c, wherein a, b, c can be single or multiple.

[0055] The above describes the structure, features and effects of the present application according to the embodiments shown in the drawings, but the above is only the preferred embodiment of the present application, and it should be noted that the technical features involved in the above embodiments and preferred modes can be reasonably combined and matched into various equivalent schemes by those skilled in the art without departing from or changing the design idea and technical effects of the present application. Therefore, the present application is not limited by the drawings shown in the drawings, and any changes or modifications made in accordance with the concept of the present application, or equivalent embodiments of equivalent changes, which do not exceed the spirit of the specification and drawings, shall be within the scope of protection of the present application.

Claims

1. An automotive air conditioning system, characterized by comprising: The utility model relates to an air conditioner, including: A blower (1), air conditioner relay (21), temperature controller (2), electromagnetic clutch (3), compressor (4), condenser (5), condenser rotation speed detection circuit (6) and power supply circuit (7); The power supply circuit (7), the blower (1), the air conditioner relay (21), the temperature controller (2), the electromagnetic clutch (3), the compressor (4) and the condenser (5) are sequentially connected in series; The condenser rotation speed detection circuit (6) is connected with the condenser (5) in series.

2. The automotive air conditioning system of claim 1, wherein, The condenser rotation speed detection circuit (6) includes: A hall element (HG); Second capacitor (C2) and third capacitor (C3) are connected in parallel with the hall element (HG); A light emitting diode (D), second pull-up resistor (R2) and fourth capacitor (C4) are connected in series with the hall element (HG); First pull-up resistor (R1) is connected in parallel with the hall element (HG); A light emitting diode (D) is connected in series with the second capacitor (C2); Second potentiometer (RT2) is connected in parallel with the third capacitor (C3); Voltage comparator (U), the positive input end of voltage comparator (U) is connected with the hall element (HG), the reverse input end of voltage comparator (U) is connected with the second potentiometer (RT2), and the output end of voltage comparator (U) is between the second pull-up resistor (R2) and the fourth capacitor (C4).

3. The automotive air conditioning system of claim 1, wherein Further including blower switch circuit in series with the blower (1).

4. The automotive air conditioning system of claim 3, wherein The blower switch circuit includes: Control circuit (111); Speed regulation resistor (112) is connected in parallel with the control circuit (111).

5. The automotive air conditioning system of claim 1, wherein Further including pressure switch (8), the first end of pressure switch (8) is connected in series with the temperature controller (2); The second end of pressure switch (8) is connected in series with the electromagnetic clutch (3).

6. The automotive air conditioning system of claim 1, wherein Further including first capacitor (C1) in parallel with the condenser (5).

7. The automotive air conditioning system of claim 1, wherein Further including first potentiometer (RT1) in series with the condenser (5).

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