CN111775657A - Air conditioner condenser fan control circuit, device and automobile - Google Patents

Abstract

The invention belongs to the technical field of automobile air conditioners, and discloses an air conditioner condenser fan control circuit, a device and an automobile. The air-conditioning condenser fan control circuit includes an oscillating circuit, a rectifying circuit and a rotational speed control circuit; wherein, the oscillating circuit receives the pressure electrical signal output by the air-conditioning refrigeration system, and outputs sinusoidal alternating current to the rectifying circuit according to the pressure electrical signal; After rectification, direct current is output to the speed control circuit; the speed control circuit controls the speed of the condenser fan according to the direct current. In the present invention, the rotational speed of the fan is determined according to the pressure level of the air-conditioning refrigeration system, so as to realize the energy saving of the condensing fan, and at the same time, the air-conditioning condenser fan is independently controlled, so as to avoid excessive instantaneous current caused by the synchronous start of the compressor and the condensing fan, and solve the problem of the existing air-conditioning system. The synchronous operation or stop of the compressor and the condensing fan in the control circuit has the problems of energy waste and excessive instantaneous current of the air conditioning system loop.

Description

Air conditioner condenser fan control circuit, device and automobile

technical field

The present invention relates to the technical field of automobile air conditioners, in particular to an air conditioner condenser fan control circuit, a device and an automobile.

Background technique

In the existing automobile air conditioning system, when the power switch, windshield switch and AC switch are turned on, the condenser fan and compressor start to work, and the refrigerant (R134a) flows through the refrigerant circulation of the evaporation core in the bellows, and passes through the compressor, condenser, The low-temperature liquid refrigerant formed by the throttling tube and other functions absorbs the heat of the surrounding air to achieve refrigeration.

The existing air-conditioning control circuit is composed of a power control circuit, a blower control circuit, an electromagnetic clutch control circuit, and a temperature control circuit. Among them, the power control circuit: controls the current of the electromagnetic clutch of the blower and the compressor, and only the ignition switch and the air volume switch are connected to the air conditioner. relay to turn on. Blower control circuit: Control the speed of the blower to control the air volume, the air conditioner relay is disconnected, and the blower stops without power supply. Electromagnetic clutch control circuit: control the electromagnetic clutch to close and disconnect the circuit, control the compressor to work and stop, only the air conditioner relay and the pressure switch are turned on at the same time, the compressor can work.

In the existing air-conditioning control circuit, when the pressure switch is closed or disconnected, the compressor and the condensing fan work synchronously or stop, but the condensing fan works for a long time and there is a certain energy waste, and the compressor and the condensing fan start almost simultaneously when the pressure switch is closed. , the instantaneous current of the air conditioning system circuit may be greater than or equal to 30A (12V), and the large starting current of the air conditioner may cause circuit damage.

The above content is only used to assist the understanding of the technical solutions of the present invention, and does not mean that the above content is the prior art.

SUMMARY OF THE INVENTION

The main purpose of the present invention is to provide an air-conditioning condenser fan control circuit, device and automobile, aiming at solving the technology of existing air-conditioning control circuit compressor and condenser fan working synchronously or stopping, resulting in energy waste and excessive instantaneous current of the air-conditioning system loop question.

In order to achieve the above purpose, the present invention provides an air conditioner condenser fan control circuit. The air conditioner condenser fan control circuit includes an oscillation circuit, a rectifier circuit and a rotational speed control circuit. The pressure output end is connected, the output end of the oscillation circuit is connected with the input end of the rectifier circuit, the output end of the rectifier circuit is connected with the input end of the rotational speed control circuit, and the output end of the rotational speed control circuit is connected with the condenser fan connection; where,

the oscillating circuit is used to receive the pressure electrical signal output by the air conditioning and refrigeration system, and output sinusoidal alternating current to the rectifier circuit according to the pressure electrical signal;

the rectifier circuit is configured to receive the sinusoidal alternating current, rectify the sinusoidal alternating current and output direct current to the rotational speed control circuit;

The rotational speed control circuit is configured to receive the direct current and control the rotational speed of the condenser fan according to the direct current.

Optionally, the air conditioner condenser fan control circuit further includes a signal amplifier circuit, the input end of the signal amplifier circuit is connected to the pressure signal output end of the air conditioner refrigeration system, and the output end of the signal amplifier circuit is connected to the oscillation circuit. the input connections of ; where,

The signal amplifying circuit is used to receive the pressure electrical signal output by the air conditioning and refrigeration system, and amplify the pressure electrical signal, so as to output the amplified pressure electrical signal to the oscillation circuit;

The oscillating circuit is used for receiving the amplified pressure electrical signal, and outputting sinusoidal alternating current to the rectifier circuit according to the amplified pressure electrical signal.

Optionally, the signal amplification circuit includes a first triode, the base of the first triode is connected to the pressure signal output end, and the collector of the first triode is connected to the oscillator circuit. is connected to the input end of the first triode, and the emitter of the first triode is grounded; wherein,

The first triode is used for receiving the electrical pressure signal output by the air conditioning and refrigeration system, and amplifying the electrical pressure signal, so as to output the amplified electrical electrical signal to the oscillation circuit.

Optionally, the signal amplifying circuit further includes a first resistor and a second resistor; wherein,

The first end of the first resistor is connected to the pressure signal output end, the second end of the first resistor is connected to the base of the first triode, and the second end of the first resistor is connected to the base of the first transistor. The first end of the second resistor is connected, and the second end of the second resistor is grounded.

Optionally, the signal amplifying circuit further includes a first capacitor, a second capacitor and a third resistor; wherein,

The first end of the first capacitor is connected to the base of the first triode, the second end of the first capacitor is grounded, and the first end of the second capacitor is connected to the first triode The second end of the second capacitor is grounded, the first end of the third resistor is connected to the emitter of the first triode, and the second end of the third resistor is grounded.

Optionally, the oscillation circuit includes a first inductor and a third capacitor; wherein,

The first end of the first inductor is connected to the output end of the signal amplifying circuit, the second end of the first inductor is grounded, and the third end of the first inductor is connected to the pressure signal output end, so the The first end of the third capacitor is connected to the output end of the signal amplifying circuit, and the second end of the third capacitor is grounded.

Optionally, the rectifier circuit includes a second inductor, a first diode, a second diode, a fourth capacitor and a fourth resistor; wherein,

The first end of the second inductor is connected to the anode of the first diode, the second end of the second inductor is connected to the anode of the second diode, and the first end of the first diode is connected to the anode of the second diode. The cathode is connected to the first end of the fourth capacitor, the cathode of the second diode is connected to the cathode of the first diode, and the second end of the fourth capacitor is connected to the second end of the second inductor. The third terminal is connected, the first terminal of the fourth resistor is connected to the first terminal of the fourth capacitor, the second terminal of the fourth resistor is connected to the second terminal of the fourth capacitor, and the first terminal of the fourth resistor is connected to the second terminal of the fourth capacitor. An inductor is coupled to the second inductor.

Optionally, the rotational speed control circuit includes a second triode; wherein,

The base of the second triode is connected to the output end of the rectifier circuit, the collector of the second triode is connected to the condenser fan, and the emitter of the second triode is grounded.

In addition, in order to achieve the above object, the present invention also provides an air conditioning condenser fan control device, the air conditioning condenser fan control device includes the air conditioning condenser fan control circuit as described above.

In addition, in order to achieve the above object, the present invention also provides an automobile, which includes the air-conditioning condenser fan control device as described above.

The invention provides an air-conditioning condenser fan control circuit. The air-conditioning condenser fan control circuit includes an oscillation circuit, a rectification circuit and a rotational speed control circuit. The input end of the oscillation circuit is connected to the pressure output end of the air conditioning refrigeration system. The output end of the oscillation circuit is connected with the input end of the rectifier circuit, the output end of the rectifier circuit is connected with the input end of the rotational speed control circuit, and the output end of the rotational speed control circuit is connected with the condenser fan; wherein , the oscillating circuit is used to receive the pressure electrical signal output by the air conditioning and refrigeration system, and output sinusoidal alternating current to the rectifier circuit according to the pressure electrical signal; the rectifying circuit is used to receive the sinusoidal alternating current, and The sinusoidal alternating current is rectified and then output direct current to the rotational speed control circuit; the rotational speed control circuit is used to receive the direct current and control the rotational speed of the condenser fan according to the direct current. In the present invention, an air-conditioning condenser fan control circuit is added to determine the rotational speed of the fan according to the pressure level of the air-conditioning refrigeration system, so as to achieve the purpose of energy saving of the condenser fan, and solve the problem of energy waste of the condenser fan working for a long time. The fan is controlled to avoid excessive instantaneous current caused by the synchronous start of the compressor and the condensing fan, which solves the technical problems of energy waste and excessive instantaneous current of the air-conditioning system loop in the existing air conditioning control circuit compressor and condensing fan working or stopping synchronously.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained according to the structures shown in these drawings without creative efforts.

FIG. 1 is a functional block diagram of an embodiment of an air conditioner condenser fan control circuit according to the present invention;

FIG. 2 is a schematic diagram of the circuit structure of an embodiment of the air conditioner condenser fan control circuit of the present invention.

Description of reference numbers:

The realization, functional characteristics and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments.

Detailed ways

It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relationship between various components under a certain posture (as shown in the accompanying drawings). The relative positional relationship, the movement situation, etc., if the specific posture changes, the directional indication also changes accordingly.

In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes, and should not be understood as indicating or implying their relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In addition, the technical solutions between the various embodiments can be combined with each other, but must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of such technical solutions does not exist. , is not within the scope of protection required by the present invention.

The invention provides an air conditioner condenser fan control circuit.

Referring to FIG. 1, the air conditioner condenser fan control circuit includes: an oscillation circuit 100, a rectifier circuit 200 and a rotational speed control circuit 300. The input end of the oscillation circuit 100 is connected to the pressure signal output end of the air conditioning refrigeration system. The oscillation circuit The output end of 100 is connected with the input end of the rectifier circuit 200, the output end of the rectifier circuit 200 is connected with the input end of the rotational speed control circuit 300, and the output end of the rotational speed control circuit 300 is connected with the condenser fan; in,

The oscillating circuit 100 is configured to receive a pressure electrical signal output by an air conditioning and refrigeration system, and output sinusoidal alternating current to the rectifier circuit 200 according to the pressure electrical signal. In this embodiment, the oscillating circuit 100 may be composed of a first inductor and a capacitor to form an LC oscillating circuit. The LC oscillating circuit receives the pressure electrical signal output by the air conditioning and refrigeration system, and outputs sinusoidal alternating current to the rectifier circuit according to the pressure electrical signal. 200, wherein the capacitor is a variable capacitor. Specifically, when the pressure value of the air-conditioning and refrigeration system increases, according to the pressure electrical signal output by the air-conditioning and refrigeration system, the relative effective area between the chips of the variable capacitor decreases, the capacity of the variable capacitor decreases, and the frequency of the oscillation circuit of the oscillation circuit 100 decreases. Speed up; when the pressure value of the air conditioning and refrigeration system decreases, according to the pressure electrical signal output by the air conditioning and refrigeration system, the relative effective area between the variable capacitors increases, and the oscillation frequency of the oscillation circuit 100 decreases.

The rectifier circuit 200 is configured to receive the sinusoidal alternating current, rectify the sinusoidal alternating current and output direct current to the rotational speed control circuit 300 . In this embodiment, the rectifier circuit 200 may include a second inductor, the second inductor is coupled to the first inductor in the oscillator circuit 100 , the rectifier circuit 200 receives sinusoidal alternating current through the second inductor, and rectifies the sinusoidal alternating current After rectification, the direct current is output to the rotational speed control circuit 300 .

The rotational speed control circuit 300 is configured to receive the direct current and control the rotational speed of the condenser fan according to the direct current. In this embodiment, the rotational speed control circuit 300 may include a triode, and the rotational speed control circuit 300 receives direct current, and controls the rotational speed of the condenser fan according to the direct current. Specifically, when the pressure value of the air-conditioning and refrigeration system increases, according to the pressure electrical signal output by the air-conditioning and refrigeration system, the relative effective area between the chips of the variable capacitor decreases, the capacity of the variable capacitor decreases, and the frequency of the oscillation circuit of the oscillation circuit 100 decreases. speed up, the conduction time of the input terminal of the triode in the speed control circuit 300 increases, thereby controlling the speed of the condenser fan to speed up; when the pressure value of the air conditioning and refrigeration system decreases, according to the pressure signal output by the air conditioning and refrigeration system, the variable capacitor chip As the relative effective area increases, the oscillating frequency of the oscillating circuit 100 decreases, and the conduction time of the transistor input terminal in the rotational speed control circuit 300 decreases, thereby controlling the rotational speed of the condenser fan to decrease. The speed of the fan is determined according to the pressure of the air-conditioning refrigeration system, so as to achieve the purpose of energy saving of the condensing fan.

This embodiment provides an air conditioner condenser fan control circuit. The air conditioner condenser fan control circuit includes an oscillator circuit 100, a rectifier circuit 200, and a rotational speed control circuit 300. The input end of the oscillator circuit 100 is connected to the pressure of the air conditioning refrigeration system. The signal output end is connected, the output end of the oscillation circuit 100 is connected with the input end of the rectifier circuit 200, the output end of the rectifier circuit 200 is connected with the input end of the rotational speed control circuit 300, and the rotational speed control circuit 300 The output end of the condenser fan is connected to the condenser fan; wherein, the oscillation circuit 100 is used to receive the pressure electrical signal output by the air conditioning and refrigeration system, and output sinusoidal alternating current to the rectifier circuit 200 according to the pressure electrical signal; the rectifier circuit 200, for receiving the sinusoidal alternating current, rectifying the sinusoidal alternating current and outputting direct current to the rotational speed control circuit 300; the rotational speed control circuit 300 for receiving the direct current and controlling the condenser according to the direct current The speed of the fan. In this embodiment, an air conditioner condenser fan control circuit is added to determine the fan speed according to the pressure of the air conditioner refrigeration system, so as to achieve the purpose of energy saving of the condenser fan, and solve the energy waste problem of the condenser fan working for a long time. The compressor and the condensing fan are controlled to avoid excessive instantaneous current caused by the synchronous start of the compressor and the condensing fan.

Further, referring to FIG. 2 , the air-conditioning condenser fan control circuit further includes a signal amplifying circuit 400. The input end of the signal amplifying circuit 400 is connected to the pressure signal output end VCC of the air-conditioning refrigeration system. The output end is connected to the input end of the oscillation circuit 100; wherein,

The signal amplifying circuit 400 is used for receiving the electrical pressure signal output by the air conditioning and refrigeration system, and amplifying the electrical pressure signal, so as to output the amplified electrical pressure signal to the oscillation circuit 100;

The oscillating circuit 100 is configured to receive the amplified pressure electrical signal, and output sinusoidal alternating current to the rectifier circuit 200 according to the amplified pressure electrical signal.

It should be noted that the air conditioner condenser fan control circuit may further include a signal amplifying circuit 400, and the signal amplifying circuit 400 may include a first transistor Q1, the base of the first transistor Q1 and the pressure signal output terminal VCC is connected, the collector of the first transistor Q1 is connected to the input end of the oscillator circuit 100, and the emitter of the first transistor Q1 is grounded; wherein, the first transistor Q1 is used to receive the output of the air conditioning and refrigeration system The pressure electric signal is amplified, and the pressure electric signal is amplified to output the amplified pressure electric signal to the oscillator circuit 100 . Wherein, the pressure signal output terminal VCC of the air-conditioning refrigeration system is also used to supply power to the air-conditioning condenser fan control circuit.

Further, referring to FIG. 2 , the signal amplification circuit 400 includes a first transistor Q1, the base of the first transistor Q1 is connected to the pressure signal output terminal VCC, and the first transistor Q1 The collector of 1 is connected to the input end of the oscillator circuit 100, and the emitter of the first transistor Q1 is grounded; wherein,

The first transistor Q1 is used for receiving the pressure electrical signal output by the air conditioning and refrigeration system, and amplifying the pressure electrical signal to output the amplified pressure electrical signal to the oscillation circuit 100 .

It should be noted that the signal amplifying circuit 400 may include a first transistor Q1. The first transistor Q1 plays a signal amplifying role, but when the first transistor Q1 is in the cut-off region, signal distortion will be caused. In the above situation, the signal amplification circuit 400 may further include a voltage divider circuit, the input end of the voltage divider circuit is connected to the pressure signal output end, and the output end of the voltage divider circuit is connected to the base of the first triode connected, the ground terminal of the voltage divider circuit is grounded, and the voltage divider circuit ensures that the first transistor Q1 works in the linear region, so as to avoid signal distortion caused by the first transistor Q1 in the cut-off region.

Further, referring to FIG. 2 , the signal amplifying circuit 400 further includes a first resistor R1 and a second resistor R2; wherein,

The first end of the first resistor R1 is connected to the pressure signal output end VCC, the second end of the first resistor R1 is connected to the base of the first transistor Q1, and the first resistor R1 The second end of the second resistor R2 is connected to the first end of the second resistor R2, and the second end of the second resistor R2 is grounded.

It should be noted that the signal amplifying circuit 400 further includes a first resistor R1 and a second resistor R2, wherein the first resistor R1 and the second resistor R2 form a voltage divider circuit, and the first transistor Q1 is ensured through the voltage divider circuit Work in the linear region to avoid signal distortion caused by the first transistor Q1 being in the cut-off region. Specifically, the value of the first resistor R1 may be 150kΩ, and the value of the second resistor R2 may be 30kΩ.

Further, referring to FIG. 2 , the signal amplification circuit 400 further includes a first capacitor C1, a second capacitor C2 and a third resistor R3; wherein,

The first end of the first capacitor C1 is connected to the base of the first transistor Q1, the second end of the first capacitor C1 is grounded, and the first end of the second capacitor C2 is connected to the first end of the first transistor Q1. The emitter of a transistor Q1 is connected, the second end of the second capacitor C2 is grounded, the first end of the third resistor R3 is connected to the emitter of the first transistor Q1, the third The second end of resistor R3 is connected to ground.

It should be noted that the signal amplifying circuit 400 further includes a first capacitor C1, a second capacitor C2 and a third resistor R3; wherein, the third resistor R3 is a load resistor and plays a current limiting role, and the value of the third resistor R3 It can be 3.6kΩ, the first transistor Q1 plays a role of signal amplification, and the first capacitor C1 and the second capacitor C2 provide an AC path for the first transistor Q1.

Further, referring to FIG. 2 , the oscillation circuit 100 includes a first inductor L1 and a third capacitor C3; wherein,

The first end of the first inductor L1 is connected to the output end of the signal amplifying circuit 400 , the second end of the first inductor L1 is grounded, and the third end of the first inductor L1 is connected to the pressure signal output The terminal VCC is connected, the first terminal of the third capacitor C3 is connected to the output terminal of the signal amplifying circuit 400, and the second terminal of the third capacitor C3 is grounded.

It should be noted that the oscillating circuit 100 can be composed of a first inductor L1 and a third capacitor C3 to form an LC oscillating circuit. The LC oscillating circuit receives the pressure electrical signal output by the air conditioning and refrigeration system, and outputs sinusoidal alternating current to In the rectifier circuit 200, the third capacitor C3 is a variable capacitor. Specifically, when the pressure value of the air-conditioning and refrigeration system increases, according to the pressure electrical signal output by the air-conditioning and refrigeration system, the relative effective area between the third capacitor C3 decreases, the capacity of the third capacitor C3 decreases, and the oscillation circuit 100 oscillates The circuit frequency is accelerated; when the pressure value of the air conditioning refrigeration system decreases, according to the pressure electrical signal output by the air conditioning refrigeration system, the relative effective area between the third capacitor C3 increases, and the oscillation frequency of the oscillation circuit 100 decreases.

Further, referring to FIG. 2 , the rectifier circuit 200 includes a second inductor L2, a first diode D1, a second diode D2, a fourth capacitor C4 and a fourth resistor R4; wherein,

The first end of the second inductor L2 is connected to the anode of the first diode D1, the second end of the second inductor L2 is connected to the anode of the second diode D2, and the first The cathode of the diode D1 is connected to the first end of the fourth capacitor C4, the cathode of the second diode D2 is connected to the cathode of the first diode D1, and the first end of the fourth capacitor C4 is connected. The two terminals are connected to the third terminal of the second inductor L2, the first terminal of the fourth resistor R4 is connected to the first terminal of the fourth capacitor C4, and the second terminal of the fourth resistor R4 is connected to the first terminal of the fourth capacitor C4. The second end of the fourth capacitor C4 is connected, and the first inductor L1 is coupled with the second inductor L2.

It should be noted that the rectifier circuit 200 may include a second inductor L2, the second inductor L2 is coupled with the first inductor L1 in the oscillator circuit 100, the rectifier circuit 200 receives the sinusoidal alternating current through the second inductor L2, After the sinusoidal alternating current is rectified, the direct current is output to the rotational speed control circuit 300 . The rectifier circuit 200 may further include a first diode D1, a second diode D2, a fourth capacitor C4 and a fourth resistor R4; wherein, the second inductor L2, the first diode D1, the second two The diode D2, the fourth capacitor C4 and the fourth resistor R4 form the rectification loop 200, and the fourth capacitor C4 is a tantalum capacitor. When the upper end of the second inductor L2 is positive, the current passes through the first diode D1; when the lower end of the second inductor L2 is positive, the current passes through the second diode D2, and the tantalum capacitor is the fourth capacitor C4. The function of electricity storage ensures that the upper end of the fourth resistor R4 is the positive electrode, and the lower end of the fourth resistor R4 is the negative electrode, and the DC power is output to the rotational speed control circuit 300 through the rectifier circuit 200, wherein the fourth resistor R4 is a load resistor, which acts as a load resistor. For the shunt effect, the value of the fourth resistor R4 can be 5.6k ohms.

Further, referring to FIG. 2 , the rotational speed control circuit 300 includes a second transistor Q2; wherein,

The base of the second triode Q2 is connected to the output end of the rectifier circuit 200, the collector of the second triode Q2 is connected to the condenser fan, and the second triode Q2 is connected to the condenser fan. The emitter is grounded.

It should be noted that the rotational speed control circuit 300 may include a second transistor Q2, and the rotational speed control circuit 300 receives direct current and controls the rotational speed of the condenser fan according to the direct current. Specifically, when the pressure value of the air-conditioning and refrigeration system increases, according to the pressure electrical signal output by the air-conditioning and refrigeration system, the relative effective area between the variable capacitors decreases, the capacity of the third capacitor C3 decreases, and the oscillating circuit of the oscillating circuit 100 decreases. When the frequency increases, the conduction time of the input end of the second transistor Q2 in the rotational speed control circuit 300 increases, thereby controlling the rotational speed of the condenser fan to increase; when the pressure value of the air-conditioning refrigeration system decreases, according to the pressure electrical signal output by the air-conditioning refrigeration system , the relative effective area between the third capacitor C3 increases, the oscillation frequency of the oscillation circuit 100 decreases, and the conduction time of the input end of the second transistor Q2 in the rotational speed control circuit 300 decreases, thereby controlling the rotational speed of the condenser fan to decrease. The speed of the fan is determined according to the pressure of the air-conditioning refrigeration system, so as to achieve the purpose of energy saving of the condensing fan.

In order to achieve the above object, the present invention also provides an air conditioning condenser fan control device, the air conditioning condenser fan control device includes the air conditioning condenser fan control circuit as described above. The specific structure of the air-conditioning condenser fan control circuit refers to the above-mentioned embodiments. Since the device adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be omitted here. Repeat them one by one.

In order to achieve the above object, the present invention also provides an automobile, which includes the air-conditioning condenser fan control device as described above. The specific structure of the air-conditioning condenser fan control device refers to the above-mentioned embodiments. Since the automobile adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be omitted here. Repeat them one by one.

It should be understood that the above are only examples, and do not constitute any limitation to the technical solutions of the present invention. In specific applications, those skilled in the art can make settings as required, which is not limited by the present invention.

It should be noted that the above-described workflow is only illustrative, and does not limit the protection scope of the present invention. In practical applications, those skilled in the art can select some or all of them to implement according to actual needs. The purpose of the solution in this embodiment is not limited here.

In addition, for technical details not described in detail in this embodiment, reference may be made to the air conditioner condenser fan control circuit provided by any embodiment of the present invention, and details are not described herein again.

Furthermore, it should be noted that, herein, the terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, article or system comprising a series of elements includes not only those elements, but also other elements not expressly listed or inherent to such a process, method, article or system. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in the process, method, article or system that includes the element.

The above-mentioned serial numbers of the embodiments of the present invention are only for description, and do not represent the advantages or disadvantages of the embodiments.

From the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus a necessary general hardware platform, and of course hardware can also be used, but in many cases the former is better implementation. Based on such understanding, the technical solutions of the present invention can be embodied in the form of software products in essence or the parts that make contributions to the prior art, and the computer software products are stored in a storage medium (such as a read-only memory). , ROM)/RAM, magnetic disk, optical disk), including several instructions to make a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) execute the methods described in the various embodiments of the present invention.

The above are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields , are similarly included in the scope of patent protection of the present invention.

Claims (10)

1. An air-conditioning condenser fan control circuit is characterized in that, the air-conditioning condenser fan control circuit comprises: an oscillatory circuit, a rectifier circuit and a rotational speed control circuit, the input end of the oscillatory circuit and the pressure output end of the air-conditioning refrigeration system The output end of the oscillation circuit is connected to the input end of the rectifier circuit, the output end of the rectifier circuit is connected to the input end of the rotational speed control circuit, and the output end of the rotational speed control circuit is connected to the condenser fan ;in, the oscillating circuit is used to receive the pressure electrical signal output by the air conditioning and refrigeration system, and output sinusoidal alternating current to the rectifier circuit according to the pressure electrical signal; the rectifier circuit is configured to receive the sinusoidal alternating current, rectify the sinusoidal alternating current and output direct current to the rotational speed control circuit; The rotational speed control circuit is configured to receive the direct current and control the rotational speed of the condenser fan according to the direct current. 2 . The air-conditioning condenser fan control circuit according to claim 1 , wherein the air-conditioning condenser fan control circuit further comprises a signal amplifying circuit, the input end of the signal amplifying circuit and the pressure signal output of the air-conditioning refrigeration system. 3 . The output end of the signal amplifying circuit is connected to the input end of the oscillation circuit; wherein, The signal amplifying circuit is used to receive the pressure electrical signal output by the air conditioning and refrigeration system, and amplify the pressure electrical signal, so as to output the amplified pressure electrical signal to the oscillation circuit; The oscillating circuit is used for receiving the amplified pressure electrical signal, and outputting sinusoidal alternating current to the rectifier circuit according to the amplified pressure electrical signal. 3 . The air-conditioning condenser fan control circuit according to claim 2 , wherein the signal amplifying circuit comprises a first triode, and the base of the first triode is connected to the pressure signal output end. 4 . , the collector of the first triode is connected to the input end of the oscillator circuit, and the emitter of the first triode is grounded; wherein, The first triode is used for receiving the electrical pressure signal output by the air conditioning and refrigeration system, and amplifying the electrical pressure signal, so as to output the amplified electrical electrical signal to the oscillation circuit. 4. The air-conditioning condenser fan control circuit according to claim 3, wherein the signal amplifying circuit further comprises a first resistor and a second resistor; wherein, The first end of the first resistor is connected to the pressure signal output end, the second end of the first resistor is connected to the base of the first triode, and the second end of the first resistor is connected to the base of the first transistor. The first end of the second resistor is connected, and the second end of the second resistor is grounded. 5. The air-conditioning condenser fan control circuit according to claim 4, wherein the signal amplifying circuit further comprises a first capacitor, a second capacitor and a third resistor; wherein, The first end of the first capacitor is connected to the base of the first triode, the second end of the first capacitor is grounded, and the first end of the second capacitor is connected to the first triode The second end of the second capacitor is grounded, the first end of the third resistor is connected to the emitter of the first triode, and the second end of the third resistor is grounded. 6. The air-conditioning condenser fan control circuit according to claim 2, wherein the oscillation circuit comprises a first inductor and a third capacitor; wherein, The first end of the first inductor is connected to the output end of the signal amplifying circuit, the second end of the first inductor is grounded, and the third end of the first inductor is connected to the pressure signal output end, so the The first end of the third capacitor is connected to the output end of the signal amplifying circuit, and the second end of the third capacitor is grounded. 7. The air conditioner condenser fan control circuit of claim 6, wherein the rectifier circuit comprises a second inductor, a first diode, a second diode, a fourth capacitor and a fourth resistor; wherein , The first end of the second inductor is connected to the anode of the first diode, the second end of the second inductor is connected to the anode of the second diode, and the first end of the first diode is connected to the anode of the second diode. The cathode is connected to the first end of the fourth capacitor, the cathode of the second diode is connected to the cathode of the first diode, and the second end of the fourth capacitor is connected to the second end of the second inductor. The third terminal is connected, the first terminal of the fourth resistor is connected to the first terminal of the fourth capacitor, the second terminal of the fourth resistor is connected to the second terminal of the fourth capacitor, and the first terminal of the fourth resistor is connected to the second terminal of the fourth capacitor. An inductor is coupled to the second inductor. 8. The air-conditioning condenser fan control circuit according to any one of claims 1 to 7, wherein the rotational speed control circuit comprises a second transistor; wherein, The base of the second triode is connected to the output end of the rectifier circuit, the collector of the second triode is connected to the condenser fan, and the emitter of the second triode is grounded. 9 . An air conditioning condenser fan control device, characterized in that, the air conditioning condenser fan control device comprises the air conditioning condenser fan control circuit according to any one of claims 1 to 8 . 10 . 10. An automobile comprising the air conditioner condenser fan control device of claim 9.

Images