CN214176983U - Vehicle-mounted air conditioner power supply circuit and vehicle-mounted air conditioner - Google Patents
Vehicle-mounted air conditioner power supply circuit and vehicle-mounted air conditioner Download PDFInfo
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- CN214176983U CN214176983U CN202022855005.6U CN202022855005U CN214176983U CN 214176983 U CN214176983 U CN 214176983U CN 202022855005 U CN202022855005 U CN 202022855005U CN 214176983 U CN214176983 U CN 214176983U
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- 239000003990 capacitor Substances 0.000 claims description 58
- 238000001514 detection method Methods 0.000 claims description 18
- 238000004378 air conditioning Methods 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 description 6
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- 230000005611 electricity Effects 0.000 description 4
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- 238000010248 power generation Methods 0.000 description 2
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- 230000020169 heat generation Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model discloses a vehicle-mounted air conditioner supply circuit and vehicle-mounted air conditioner, this circuit have alternating current power supply mode and battery powered mode, and this circuit includes: the alternating current power supply input end is used for accessing an alternating current power supply; the direct-current power supply input end is used for connecting a power supply battery; the first input end of the power supply mode switching circuit is connected with the input end of the alternating current power supply, and the second input end of the power supply mode switching circuit is connected with the input end of the direct current power supply; the power supply mode switching circuit controls the input end of the alternating current power supply to be electrically connected with the PFC circuit in the alternating current power supply mode so that the PFC circuit converts the accessed alternating current into direct current and outputs the direct current; in the battery power supply mode, the power supply mode switching circuit controls the input end of the direct current power supply to be electrically connected with the PFC circuit, so that the PFC circuit boosts the accessed direct current and outputs the boosted direct current. The utility model discloses an on-vehicle air conditioner's alternating current-direct current power supply is compatible.
Description
Technical Field
The utility model relates to a vehicle-mounted air conditioner technical field, in particular to vehicle-mounted air conditioner supply circuit and vehicle-mounted air conditioner.
Background
At present, a vehicle-mounted air conditioner is usually powered by a battery, so that a power supply circuit of the vehicle-mounted air conditioner is only suitable for direct current power supply and cannot meet the requirement of alternating current use, the applicability is narrow, the power supply of the vehicle-mounted air conditioner depends on the battery for power supply, certain damage can be caused to the battery after long-time use, and the battery is easy to replace.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims at providing a vehicle-mounted air conditioner supply circuit and vehicle-mounted air conditioner, aim at realizing vehicle-mounted air conditioner's alternating current-direct current power supply compatibility.
In order to achieve the above object, the utility model provides a vehicle-mounted air conditioner power supply circuit, vehicle-mounted air conditioner power supply circuit have alternating current power supply mode and battery power supply mode, vehicle-mounted air conditioner power supply circuit includes:
the alternating current power supply input end is used for accessing an alternating current power supply;
the direct-current power supply input end is used for connecting a power supply battery;
a first input end of the power supply mode switching circuit is connected with the input end of the alternating current power supply, and a second input end of the power supply mode switching circuit is connected with the input end of the direct current power supply; and the number of the first and second groups,
the PFC circuit is connected with the output end of the power supply mode switching circuit; wherein,
in the alternating current power supply mode, the power supply mode switching circuit controls the input end of the alternating current power supply to be electrically connected with the PFC circuit, so that the PFC circuit converts the accessed alternating current into direct current and outputs the direct current;
and in the battery power supply mode, the power supply mode switching circuit controls the input end of the direct current power supply to be electrically connected with the PFC circuit, so that the PFC circuit boosts the accessed direct current and outputs the boosted direct current.
Optionally, the on-vehicle air conditioner power supply circuit further includes:
the detection end of the power supply detection control circuit is connected with the input end of the alternating current power supply, and the control end of the power supply detection control circuit is connected with the controlled end of the power supply mode switching circuit; the power supply detection control circuit is used for controlling the power supply mode switching circuit to switch from an alternating current power supply mode to a battery power supply mode when detecting that the alternating current power supply stops supplying power.
Optionally, the power supply detection control circuit includes a hall sensor and a main controller, the hall sensor is serially connected to the input end of the ac power supply and the first input end of the power supply mode switching circuit, the output end of the hall sensor is connected to the main controller, and the control end of the main controller is connected to the power supply mode switching circuit and the PFC circuit, respectively.
Optionally, in the ac power supply mode, the PFC circuit operates as an interleaved parallel wiener voltage-multiplying rectifying and boosting circuit;
in the battery powered mode, the PFC circuit operates as a PFC boost circuit.
Optionally, when the PFC circuit operates as an interleaved parallel wiener voltage-multiplying rectifying and boosting circuit, the interleaved parallel wiener voltage-multiplying rectifying and boosting circuit comprises a plurality of wiener voltage-multiplying rectifying and boosting branches, each of the wiener voltage-multiplying rectifying and boosting branches comprising:
the bridge-arm-type power supply comprises a first inductor, a rectifying bridge-arm circuit, a first switch tube, a second switch tube, a first capacitor and a second capacitor, wherein the first end of the first inductor is the input end of the staggered parallel Vienna voltage-multiplying rectifying and boosting circuit, the second end of the first inductor is connected with the input end of the first switch tube and the midpoint of the rectifying bridge-arm circuit in an interconnecting mode, the output end of the first switch tube is connected with the common end of the first capacitor and the second capacitor through the second switch tube, one end of the rectifying bridge-arm circuit is connected with one end of the first capacitor, and the other end of the rectifying bridge-arm circuit is connected with one end of the second capacitor.
Optionally, the rectifier bridge arm circuit includes a first diode and a second diode, an anode of the first diode is a midpoint of the rectifier bridge arm circuit and is connected to a cathode of the second diode, the cathode of the first diode is connected to one end of the first capacitor, and an anode of the second diode is connected to one end of the second capacitor.
Optionally, the rectifier bridge arm circuit includes a third switching tube and a fourth switching tube, an input end of the third switching tube is a midpoint of the rectifier bridge arm circuit and is connected to an output end of the fourth switching tube, an output end of the third switching tube is connected to one end of the first capacitor, and an input end of the fourth switching tube is connected to one end of the second capacitor.
Optionally, when the PFC circuit operates as a PFC boost circuit, the PFC boost circuit includes a plurality of PFC boost branches, and each PFC boost branch includes:
the first end of the second inductor is the input end of the PFC boost branch circuit, and the second end of the second inductor is connected with the input end of the fifth switching tube and the anode of the PFC diode; the output end of the fifth switching tube is grounded through the sixth switching tube; and the cathode of the PFC diode is connected with one end of the third capacitor, and the other end of the third capacitor is grounded.
Optionally, the power supply mode switching circuit includes a first electronic switch and a second electronic switch, and the first electronic switch is serially connected between the ac power input terminal and the first input terminal of the power supply mode switching circuit;
the second electronic switch is arranged between the input end of the direct current power supply and the second input end of the power supply mode switching circuit in series.
The utility model also provides a vehicle air conditioner, include as above vehicle air conditioner supply circuit.
The utility model discloses on-vehicle air conditioner supply circuit is through setting up power supply mode switching circuit and PFC circuit to be connected two inputs of power supply mode switching circuit with alternating current power supply input and DC power supply input respectively, thereby when on-vehicle air conditioner supply circuit work is under the alternating current power supply mode, through power supply mode switching circuit control alternating current power supply input with PFC circuit electricity is connected, so that the AC conversion that the PFC circuit will insert exports after the direct current. When the vehicle-mounted air conditioner power supply circuit works in the battery power supply mode, the input end of the direct current power supply is controlled to be electrically connected with the PFC circuit through the power supply mode switching circuit, so that the PFC circuit boosts the accessed direct current and outputs the boosted direct current. The utility model discloses a PFC circuit can multiplex work in AC power supply mode and battery power supply mode, can reduce the use of device, improves the utilization ratio of device to solved. The utility model discloses on-vehicle air conditioner supply circuit can carry out nimble switching between AC power supply mode and battery supply mode according to the application demand to realize the compatibility of two kinds of power supply modes, thereby solved on-vehicle air conditioner and can only use direct current topological structure, can't use the problem in exchanging. The utility model discloses still solved on-vehicle air conditioner and needed to rely on battery powered, lead to the battery to use for a long time, reduced life easily and need frequently change the battery, the utility model discloses still solved the generator simultaneously when charging for the battery, lead to the unable normal use of on-vehicle air conditioner problem.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic diagram of functional modules of an embodiment of a power supply circuit of a vehicle-mounted air conditioner of the present invention;
FIG. 2 is a schematic circuit diagram of an embodiment of the power supply circuit for the vehicle-mounted air conditioner of the present invention;
fig. 3 is a schematic circuit diagram of an embodiment of the power supply circuit for the vehicle-mounted air conditioner of the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 10 | Power supply mode switching circuit | AC-IN | Input end of |
| 20 | PFC circuit | DC-IN | DC power |
| 30 | Power supply |
100 | Power supply battery |
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The utility model provides a vehicle-mounted air conditioner power supply circuit.
All large-sized automobiles need to be equipped with an air conditioner on the global scale, and the power supply mode of the air conditioner is only one of the power supply modes of a power supply battery. The working principle is that in the running process of the automobile, the generator arranged on the automobile is used for generating electricity, the generator generates alternating current, then the alternating current is rectified to be stable direct current voltage, and finally energy is stored in a power supply battery. The air conditioner is operated by being connected with a power supply battery for supplying power, the direct current-direct current boosting voltage is arranged in the air conditioner, the voltage of the power supply battery is boosted to a certain voltage, and then three-phase alternating current is generated through inversion of an inverter to drive a compressor to work, so that refrigeration/heating is realized. The technology is only suitable for direct current, and in the vehicle-mounted air conditioner, the vehicle-mounted air conditioner can only provide direct current through the power supply battery, so the vehicle-mounted air conditioner can be used only after the power supply battery is charged, if the power of the power supply battery is insufficient or the power is not charged in time, the normal use of the air conditioner is influenced, and the service life of the power supply battery is influenced even if the automobile is provided with the generator for charging the power supply battery while charging. In addition, the long-term use of the power supply battery for power supply also results in a decrease in the durability of the power supply battery.
In order to solve the above problem, referring to fig. 1, in an embodiment of the present invention, the vehicle-mounted air conditioner power supply circuit has an ac power supply mode and a battery power supply mode, and the vehicle-mounted air conditioner power supply circuit includes:
the input end AC-IN of the alternating current power supply is used for accessing the alternating current power supply;
the input end DC-IN of the direct current power supply is used for being connected with the power supply battery 100;
a power supply mode switching circuit 10, a first input end of the power supply mode switching circuit 10 is connected with the AC power input end AC-IN, and a second input end of the power supply mode switching circuit 10 is connected with the DC power input end DC-IN; and the number of the first and second groups,
a PFC circuit 20 connected to an output terminal of the power supply mode switching circuit 10; wherein,
IN the AC power supply mode, the power supply mode switching circuit 10 controls the AC power input terminal AC-IN to be electrically connected to the PFC circuit 20, so that the PFC circuit 20 converts the accessed AC power into dc power and outputs the dc power;
IN the battery power supply mode, the power supply mode switching circuit 10 controls the DC power input terminal DC-IN to be electrically connected to the PFC circuit 20, so that the PFC circuit 20 boosts the input DC power and outputs the boosted DC power.
IN this embodiment, the AC power input terminal AC-IN is connected to an AC power supply, specifically, the AC power input terminal AC-IN may be a generator provided on an automobile, and IN an operation process of the automobile, the generator operates and generates electricity, and the generator generates AC power, that is, the generator is electrically connected to the AC power input terminal AC-IN as the AC power supply, and outputs the generated AC power to the AC power input terminal AC-IN. In this process, the generator may rectify the generated ac power into a stable dc voltage through the rectifying circuit, and store the energy in the power supply battery 100 to charge the power supply battery 100. In this process, whether the generator charges the power supply battery 100 or not, that is, the charging parameters of the generator for outputting the generated voltage, the generated current, and the like to charge the power supply battery 100 may also be determined according to the remaining electric quantity of the power supply battery 100, which is not limited herein.
The input end DC-IN of the DC power supply and the power supply battery 100, and the charge amount of the power supply battery 100 may be set according to the model of the vehicle, the size of the vehicle, the number of the on-board air conditioners, and the like, which is not limited herein. The power supply battery 100 is also electrically connected to a generator, and whether the power supply battery 100 is in a discharged state or a charged state can be determined according to the remaining capacity of the power supply battery 100, the operating state of the generator, and the like.
The PFC circuit 20 is a circuit for improving power factor and electric energy utilization rate, and in this embodiment, the PFC circuit 20 may be multiplexed, that is, the PFC circuit 20 may complete AC-DC conversion, and may convert AC power into DC power without providing a bridge rectifier, and implement power factor correction to complete AC-DC conversion. The PFC circuit 20 may also perform DC-DC conversion, boost the accessed direct current, and implement power factor correction to complete the DC-DC conversion. Therefore, mutual utilization of the components of the two topology circuits, namely the PFC circuit 20 in the alternating current mode and the PFC circuit 20 in the direct current mode, can be realized, the utilization rate of the components can be improved, and the cost can be reduced.
The power supply mode switching circuit 10 has two input terminals, one of which is connected to the AC power input terminal AC-IN for receiving AC power, and the other of which is connected to the DC power input terminal DC-IN for receiving DC power output from the power supply battery 100. In the ac power supply mode, the power supply mode switching circuit 10 controls the ac input terminal to be electrically connected to the PFC circuit 20, so that the ac power output by the generator is rectified by the PFC circuit 20, and after power factor correction is achieved, the dc power is output to the indoor unit and/or the outdoor unit of the vehicle air conditioner to drive the vehicle air conditioner to work. In the battery power supply mode, the power supply mode switching circuit 10 switches and controls the direct current input end to be electrically connected with the PFC circuit 20, so that the direct current output by the power supply battery 100 is boosted by the PFC circuit 20, the boost is output after the power factor correction is realized, and the direct current corrected by the power factor is transmitted to an indoor unit and/or an outdoor unit of the vehicle-mounted air conditioner to drive the vehicle-mounted air conditioner to work.
The utility model discloses on-vehicle air conditioner supply circuit is through setting up power supply mode switching circuit 10 and PFC circuit 20 to two inputs with power supply mode switching circuit 10 are connected with alternating current power supply input and DC power supply input DC-IN respectively, thereby when on-vehicle air conditioner supply circuit work is under the alternating current power supply mode, through power supply mode switching circuit 10 control alternating current power supply input AC-IN with PFC circuit 20 electricity is connected, so that PFC circuit 20 exports after the alternating current conversion who inserts is the direct current. When the vehicle-mounted air conditioner power supply circuit works IN the battery power supply mode, the power supply mode switching circuit 10 controls the input end DC-IN of the direct current power supply to be electrically connected with the PFC circuit 20, so that the PFC circuit 20 boosts the accessed direct current and outputs the boosted direct current. The utility model discloses a PFC circuit 20 can multiplex work in AC power supply mode and battery power supply mode, can reduce the use of device, improves the utilization ratio of device to solved. The utility model discloses on-vehicle air conditioner supply circuit can carry out nimble switching between AC power supply mode and battery supply mode according to the application demand to realize the compatibility of two kinds of power supply modes, thereby solved on-vehicle air conditioner and can only use direct current topological structure, can't use the problem in exchanging. The utility model discloses still solved on-vehicle air conditioner and needed to rely on battery powered, lead to the battery to use for a long time, reduced life easily and need frequently change the battery, the utility model discloses still solved the generator simultaneously when charging for the battery, lead to the unable normal use of on-vehicle air conditioner problem.
Referring to fig. 1, in an embodiment, the on-vehicle air conditioner power supply circuit further includes:
a power supply detection control circuit 30, wherein a detection end of the power supply detection control circuit 30 is connected with the AC power input end AC-IN, and a control end of the power supply detection control circuit 30 is connected with a controlled end of the power supply mode switching circuit 10; the power supply detection control circuit 30 is configured to control the power supply mode switching circuit 10 to switch from the ac power supply mode to the battery power supply mode when detecting that the ac power supply stops supplying power.
It is understood that, in order to avoid the power supply of the power supply battery 100 for a long time, in this embodiment, the priority of the ac power supply mode may be set to be higher than that of the battery power supply mode, that is, when the vehicle air conditioner is operating, the power supply detection control circuit 30 may set the ac power supply mode to be the default mode, for example, when the power generation capability of the generator is sufficient during the running of the vehicle, the generator is preferably used to output ac power. That is, the power supply mode switching circuit 10 is controlled to control the AC power input terminal AC-IN to be electrically connected to the PFC circuit 20, so that the PFC circuit 20 converts the accessed AC power into DC power and outputs the DC power, and once it is detected that the AC power stops supplying power, for example, when the automobile is stationary and the power supply capability of the generator is insufficient, the power supply mode switching circuit 10 and the AC power supply mode are controlled to switch to the battery power supply mode, that is, the power supply mode switching circuit 10 is controlled to control the DC power input terminal DC-IN to be electrically connected to the PFC circuit 20, so that the PFC circuit 20 boosts the accessed DC power and outputs the DC power. When it is detected that the ac power source is restored, for example, when the vehicle is restarted, and the power supply capability of the generator is sufficient, the power supply mode switching circuit 10 and the battery power supply mode can be controlled to switch to the ac power supply mode. Therefore, the problem that the vehicle-mounted air conditioner needs to be powered by the battery to cause the battery to be used for a long time, the service life is easily shortened, and the battery needs to be frequently replaced can be avoided. In addition, under the AC power supply mode, the alternating current that the generator produced can directly convert the power supply who carries air conditioner into through PFC circuit 20 to solved and needed the generator to give battery powered, supplied power by power supply battery 100 is indirect again, leads to the utilization ratio decline of electric energy, the utility model discloses still be favorable to reducing the consumption of on-vehicle power supply circuit self.
Referring to fig. 1, IN an embodiment, the power supply detection control circuit 30 includes hall sensors 311 and 312 and a main controller (not shown), the hall sensor 31 is serially connected to the AC-IN input terminal and the first input terminal of the power supply mode switching circuit 10, the output terminals of the hall sensors 311 and 312 are connected to the main controller, and the control terminal of the main controller is respectively connected to the power supply mode switching circuit 10 and the PFC circuit 20.
IN this embodiment, the hall sensors 311 and 312 are used as a device for collecting input current and linearly converting the input current into output voltage, and this embodiment can be used for collecting current flowing through the AC-IN input terminal of the AC power supply, converting the collected current into a corresponding voltage value, and outputting the voltage value to the main controller. The main controller can be a microcontroller such as a DSP and a singlechip. The main controller can also be the control center of the vehicle air conditioner, the main controller can utilize various interfaces and lines to connect all parts of the whole vehicle air conditioner, and the main controller can execute various functions of the earphone and process data by running or executing software programs and/or modules stored in the memory and calling data stored in the memory, thereby carrying out the overall monitoring on the vehicle air conditioner. The main controller may determine whether the power generation capability of the generator is capable of supplying power to the vehicle air conditioner according to the received current values detected by the hall sensors 311, 312. Specifically, when the main controller determines that the current flowing through the AC power input terminal AC-IN is greater than or equal to a certain preset voltage threshold according to the current value detected by the hall sensor 31, the main controller operates IN an AC power supply mode, and controls the power supply mode switching circuit 10 to control the AC power input terminal AC-IN to be electrically connected with the PFC circuit 20, so that the PFC circuit 20 converts the accessed AC power into dc power and outputs the dc power. When the current flowing through the input end AC-IN of the alternating current power supply is determined to be smaller than a certain preset voltage threshold value, the battery power supply mode is operated, and the power supply mode switching circuit 10 is controlled to control the input end DC-IN of the direct current power supply to be electrically connected with the PFC circuit 20, so that the PFC circuit 20 boosts the accessed direct current and outputs the boosted direct current.
In addition, the main controller outputs different PWM signals to the PFC circuit 20 according to different operation modes, so that the PFC circuit 20 completes ac-dc output or completes dc-dc output in the corresponding mode.
Referring to fig. 2, in the ac power supply mode, the PFC circuit 20 operates as an interleaved parallel vienna voltage-multiplying rectifying and boosting circuit;
in the battery powered mode, the PFC circuit 20 operates as a PFC boost circuit.
In this embodiment, different topologies are formed according to different power supply modes of operation, in the ac power supply mode, the PFC circuit 20 forms an interleaved vienna rectifier circuit, and in the battery power supply mode, the PFC circuit 20 forms a PFC boost circuit.
Further, in the above embodiment, when the PFC circuit 20 operates as an interleaved parallel wiener voltage-multiplying rectifying and boosting circuit, the interleaved parallel wiener voltage-multiplying rectifying and boosting circuit includes a plurality of wiener voltage-multiplying rectifying and boosting branches, each of the wiener voltage-multiplying rectifying and boosting branches includes:
the bridge-type alternating current power supply comprises first inductors (L11 and L12), a rectifying bridge arm circuit (not shown), first switching tubes (Q11 and Q12), second switching tubes (Q21 and Q22), a first capacitor C1 and a second capacitor C2, wherein the first ends of the first inductors (L11 and L12) are input ends of the staggered parallel Vienna voltage-multiplying rectifying and boosting circuit, the second ends of the first inductors (L11 and L12) are connected with input ends of the first switching tubes (Q11 and Q12) and a midpoint of the rectifying bridge arm circuit, output ends of the first switching tubes (Q11 and Q12) are connected with a common end of the first capacitor C1 and the second capacitor C2 through the second switching tubes (Q21 and Q22), one end of the rectifying bridge arm circuit is connected with one end of a first capacitor C1, and the other end of the rectifying bridge arm circuit is connected with one end of the second capacitor C2.
In this embodiment, the number of the vienna voltage-doubling rectifying and boosting branches may be two. When the power supply circuit works IN an alternating current power supply mode, the power supply mode switching circuit 10 controls the alternating current power supply input end AC-IN to be electrically connected with the PFC circuit 20. The alternating current input end, the first input end of the power supply mode switching circuit 10, the hall sensor 311, the first inductor L11, the rectifier bridge arm circuit, the first switch tube Q11, the second switch tube Q21, the first capacitor C1 and the second capacitor C2 form a vienna voltage-doubling rectifier current loop 211, and the alternating current input end, the first input end of the power supply mode switching circuit 10, the hall sensor 312, the first inductor L2, the rectifier bridge arm circuit, the first switch tube Q12, the second switch tube Q22, the first capacitor C21 and the second capacitor C2 form a vienna voltage-doubling rectifier current loop 212 of another branch. The two branches have the same working principle, so that the current can be staggered with each other, and the total input current harmonic component of the PFC circuit 20 can be reduced.
In this embodiment, one of the vienna voltage-doubling rectifying and boosting branches is taken as an example to specifically describe the working principle of the PFC circuit 20 in the ac power supply mode.
When the alternating current output by the generator and the voltage input at the alternating current input end are in a positive half shaft, the main controller outputs a control signal PFC _ PWM1 to drive the first switching tube Q11 to be switched on (the second switching tube Q12 is switched off), the current flows from the alternating current input end → the Hall sensor 311 → the first inductor L11 → the first switching tube Q11 → the freewheeling diode of the second switching tube Q21 to form an inductor charging mode, and after the control signal is cancelled, the energy stored in the inductor is transferred to the first capacitor C1, and the current flows to the alternating current input end → the power supply mode switching circuit 10 → the Hall sensor 311 → the first inductor L11 → the upper bridge of the rectifier bridge arm circuit → the first capacitor C1, and the energy is transferred to the first capacitor C1 through the flow direction; when the voltage input by the alternating current input end is at a negative half shaft, the control signal PFC _ PWM1 is driven to control the second switching tube Q21 to be switched on (the first switching tube Q11 is switched off), the current is switched from the second switching tube Q21 → the freewheeling diode of the first switching tube Q11 → the first inductor L11 → the hall sensor 311 → the power supply mode switching circuit 10 to form an inductor charging mode, and when the control signal is cancelled, the energy stored in the inductor is transferred to the second capacitor C2, and the current flows to the first inductor L12 → the hall sensor 311 → the power supply mode switching circuit 10 → the alternating current input end → the second capacitor C2 → the lower bridge of the rectifier bridge arm circuit, and the inductor energy is transferred to the second capacitor C2 through the current flow. The circuit repeatedly works in the mode, and finally, the voltage-multiplying rectification boosting effect is achieved. The first switching tubes (Q11, Q12) and the second switching tubes ((Q21, Q22)) can be implemented by MOSFETs or IGBTs.
Referring to fig. 2, in an embodiment, the number of the rectifier bridge arm circuits corresponds to a vienna voltage-multiplying rectifying and boosting branch arrangement, each rectifier bridge arm circuit includes a first diode (D11, D12) and a second diode (D21, D22), an anode of the first diode (D11, D12) is a midpoint of the rectifier bridge arm circuit and is connected to a cathode of the second diode (D21, D22), a cathode of the first diode D1 is connected to one end of the first capacitor C1, and an anode of the second diode (D21, D22) is connected to one end of the second capacitor C2.
In the present embodiment, the first diodes (D11, D12) are used as the upper bridge of the rectifier bridge arm circuit, the second diodes (D21, D22) are used as the lower bridge of the rectifier bridge arm circuit, when the voltage input from the ac input terminal is in the positive half axis, the first diodes (D11, D12) are turned on, the second diodes (D21, D22) are turned off, when the voltage input from the ac input terminal is in the negative half axis, the second diodes (D21, D22) are turned on, and the first diodes (D11, D12) are turned off.
Referring to fig. 2, it can be understood that the conduction voltage drop of the diode is larger than that of the MOS transistor and the IGBT, so that the power consumption of the PFC circuit 20 itself is increased, and when the first switching transistors Q1 and Q12 or the second switching transistors Q21 and Q22 are different, the current for charging the bus capacitor is very large, and at a high operating frequency, the diode has a high reverse recovery charge, and the like, which may cause serious heat generation.
In another embodiment, the rectifier bridge arm circuit may be implemented by using a third switching tube (not shown in the figure) and a fourth switching tube (not shown in the figure), wherein an input end of the third switching tube is a midpoint of the rectifier bridge arm circuit and is connected to an output end of the fourth switching tube, an output end of the third switching tube is connected to one end of the first capacitor C1, and an input end of the fourth switching tube is connected to one end of the second capacitor C2.
In this embodiment, the third switching tube and the fourth switching tube may be implemented by using an MOS tube and an IGBT, the third switching tube is used as an upper bridge of the rectifier bridge arm circuit, the fourth switching tube is used as a lower bridge of the rectifier bridge arm circuit, when the voltage input from the ac input terminal is in a positive half axis, the third switching tube is turned on, the fourth switching tube is turned off, and when the voltage input from the ac input terminal is in a negative half axis, the fourth switching tube is turned on, and the third switching tube is turned off.
Referring to fig. 3, in an embodiment, when the PFC circuit 20 operates as a PFC boost circuit, the PFC boost circuit includes a plurality of PFC boost branches, each of the PFC boost branches includes:
second inductors (L21, L22), PFC diodes (D31, D32), fifth switching tubes ((Q51, Q52), (Q51, Q52)2), sixth switching tubes (Q61, Q62), third capacitors C3, C32, wherein a first end of the second inductors (L21, L22) is an input end of the PFC boost branch, and second ends of the second inductors (L21, L22) are interconnected with an input end of the fifth switching tubes (Q51, Q52) and anodes of the PFC diodes (D31, D32); the output end of the fifth switch tube (Q51, Q52) is grounded with one end of the third capacitor C3 through the sixth switch tube (Q61, Q62); the cathodes of the PFC diodes (D31, D32) are connected to the other end of the third capacitor C3.
In this embodiment, in the battery power supply mode, the PFC circuit 20 is used as a PFC boost circuit, the number of PFC boost branches may be two, and the number of the power supply batteries 100 may also be two, that is, the battery is composed of E1 and E2, the battery E1 corresponds to one boost circuit, the battery E2 corresponds to another boost circuit, and the two boost circuits have the same working principle, the boost circuit corresponding to the battery E1 charges the third capacitor C31, and the boost circuit corresponding to the battery E2 charges the third capacitor C31. When the power supply circuit works IN the battery power supply mode, the power supply mode switching circuit 10 controls the direct current power supply input terminal DC-IN to be electrically connected with the PFC circuit 20. The E1 battery, the PFC boost branch 221, and the power supply mode switching circuit 10 form a boost circuit, and specifically, the boost voltage of E1 is realized by E1, the power supply mode switching circuit 10, the hall sensor 311, the second inductor L21, the fifth switching tube Q51, the sixth switch Q61, the PFC diode D31, and the third capacitor C31. The E2, the PFC boost branch 222 and the power supply mode switching circuit 10 form a boost loop, and the boost voltage of the E2 is realized by E2, RY4, the hall sensor 32, the second inductor L22, the fifth switching tube Q52, the sixth switching tube 62, the PFC diode D32 and the third capacitor C32; e1 briefly introduces the boosted voltage, when the power supply mode switching circuit 10 controls the DC-IN input terminal of the DC power supply to be electrically connected to the PFC circuit 20 (after the relay RY3 is pulled IN), the control signal PFC _ PWM1 drives to control the conduction of the fifth switching tube Q51, the current flows from RY3 → hall sensor 311 → the second inductor L21 → the fifth switching tube Q51 → the freewheeling diode of the sixth switching tube Q61, so as to form the inductor charging mode, when the control signal is cancelled, the energy stored IN the inductor is transferred to the third capacitor C31, the current flows to RY3 → hall sensor 311 → the third inductor L21 → PFC diode 31 → the third capacitor C31, and the energy is transferred to the electrolytic capacitor C1 through the flow direction; e2, to briefly introduce the boosted voltage, when the power supply mode switching circuit 10 controls the DC-IN input terminal of the DC power supply to be electrically connected to the PFC circuit 20 (after the relay RY4 is pulled IN), the control signal PFC _ PWM1 is driven to control the conduction of the Q4 tube, and the current flows from the fifth switching tube Q52 → the freewheeling diode of the sixth switching tube Q62 → the second inductor L22 → the hall sensor 312 → RY4 to form an inductor charging mode, and when the control signal is cancelled, the energy stored IN the inductor is transferred to the third capacitor C32, and the current flows to the second inductor L22 → the hall sensor 312 → RY4 → E2 → the third capacitor C32 → PFC diode D32, and the energy is transferred to the electrolytic capacitor C32 through the flow direction; the circuit repeatedly operates in this mode, and finally the battery boosting effect is achieved.
Referring to fig. 2 or fig. 3, IN an embodiment, the power supply mode switching circuit 10 includes a first electronic switch S1 and a second electronic switch S2, the first electronic switch S1 is disposed IN series between the AC power input terminal AC-IN and a first input terminal of the power supply mode switching circuit 10;
the second electronic switch S2 is serially connected between the DC power input DC-IN and the second input of the power supply mode switching circuit 10.
The first electronic switch S1 may be set to two according to the number of the PFC multiplexing branches, and similarly, the second electronic switch S2 may also be set to two according to the number of the PFC multiplexing branches. The first electronic switch S1 and the second electronic switch S2 may be implemented by a relay, a breaker, or the like. The introduction of AC/DC voltage mutual switching and multiplexing structure: when the air conditioner works in an alternating current mode, the relays RY1 and RY2 are attracted, the relays RY3 and RY4 are disconnected, and the power supply battery 100 is not used and is not connected to the PFC circuit 20. When the air conditioner works in a battery mode, the relays RY3 and RY4 are attracted, the relays RY1 and RY2 are disconnected, and the alternating current port is disconnected; the relays RY1, RY2, RY3 and RY4 realize that alternating current and direct current can be switched mutually, the topological structure in the figure can realize that alternating current and direct current topology can be multiplexed, the maximum utilization rate of devices is realized, and meanwhile, the cost can be reduced and the layout of PCB space is realized.
The utility model relates to a vehicle air conditioner, include as above vehicle air conditioner supply circuit.
The detailed structure of the vehicle-mounted air conditioner power supply circuit can refer to the embodiment and is not described herein again; it can be understood that, because the utility model discloses used above-mentioned on-vehicle air conditioner supply circuit among the on-vehicle air conditioner, consequently, the utility model discloses on-vehicle air conditioner's embodiment includes all technical scheme of the whole embodiments of above-mentioned on-vehicle air conditioner supply circuit, and the technological effect that reaches is also identical, no longer gives unnecessary details here.
The above is only the optional embodiment of the present invention, and not the scope of the present invention is limited thereby, all the equivalent structure changes made by the contents of the specification and the drawings are utilized under the inventive concept of the present invention, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.
Claims (10)
1. A vehicle air conditioner power supply circuit, characterized in that, vehicle air conditioner power supply circuit has AC power supply mode and battery power supply mode, vehicle air conditioner power supply circuit includes:
the alternating current power supply input end is used for accessing an alternating current power supply;
the direct-current power supply input end is used for connecting a power supply battery;
a first input end of the power supply mode switching circuit is connected with the input end of the alternating current power supply, and a second input end of the power supply mode switching circuit is connected with the input end of the direct current power supply; and the number of the first and second groups,
the PFC circuit is connected with the output end of the power supply mode switching circuit; wherein,
in the alternating current power supply mode, the power supply mode switching circuit controls the input end of the alternating current power supply to be electrically connected with the PFC circuit, so that the PFC circuit converts the accessed alternating current into direct current and outputs the direct current;
and in the battery power supply mode, the power supply mode switching circuit controls the input end of the direct current power supply to be electrically connected with the PFC circuit, so that the PFC circuit boosts the accessed direct current and outputs the boosted direct current.
2. The on-board air conditioning supply circuit of claim 1, further comprising:
the detection end of the power supply detection control circuit is connected with the input end of the alternating current power supply, and the control end of the power supply detection control circuit is connected with the controlled end of the power supply mode switching circuit; the power supply detection control circuit is used for controlling the power supply mode switching circuit to switch from an alternating current power supply mode to a battery power supply mode when detecting that the alternating current power supply stops supplying power.
3. The vehicle-mounted air conditioner power supply circuit according to claim 2, wherein the power supply detection control circuit comprises a hall sensor and a main controller, the hall sensor is serially connected to the input end of the alternating current power supply and the first input end of the power supply mode switching circuit, the output end of the hall sensor is connected to the main controller, and the control end of the main controller is respectively connected to the power supply mode switching circuit and the PFC circuit.
4. The on-board air conditioner power supply circuit according to claim 1, wherein in the ac power supply mode, the PFC circuit operates as an interleaved parallel vienna voltage-multiplying rectifying boost circuit;
in the battery powered mode, the PFC circuit operates as a PFC boost circuit.
5. The on-board air conditioner power supply circuit according to claim 4, wherein when the PFC circuit operates as an interleaved parallel Vienna voltage rectifying and boosting circuit, the interleaved Vienna voltage rectifying and boosting circuit comprises a plurality of Vienna voltage rectifying and boosting branches, each of the Vienna voltage rectifying and boosting branches comprising:
the bridge-arm-type power supply comprises a first inductor, a rectifying bridge-arm circuit, a first switch tube, a second switch tube, a first capacitor and a second capacitor, wherein the first end of the first inductor is the input end of the staggered parallel Vienna voltage-multiplying rectifying and boosting circuit, the second end of the first inductor is connected with the input end of the first switch tube and the midpoint of the rectifying bridge-arm circuit in an interconnecting mode, the output end of the first switch tube is connected with the common end of the first capacitor and the second capacitor through the second switch tube, one end of the rectifying bridge-arm circuit is connected with one end of the first capacitor, and the other end of the rectifying bridge-arm circuit is connected with one end of the second capacitor.
6. The vehicle air conditioner power supply circuit according to claim 5, wherein the rectifier bridge arm circuit comprises a first diode and a second diode, an anode of the first diode is a midpoint of the rectifier bridge arm circuit and is connected with a cathode of the second diode, a cathode of the first diode is connected with one end of the first capacitor, and an anode of the second diode is connected with one end of the second capacitor.
7. The vehicle-mounted air conditioner power supply circuit according to claim 5, wherein the rectifier bridge arm circuit comprises a third switching tube and a fourth switching tube, an input end of the third switching tube is a middle point of the rectifier bridge arm circuit and is connected with an output end of the fourth switching tube, an output end of the third switching tube is connected with one end of the first capacitor, and an input end of the fourth switching tube is connected with one end of the second capacitor.
8. The on-board air conditioner power supply circuit of claim 4, wherein when the PFC circuit operates as a PFC boost circuit, the PFC boost circuit comprises a plurality of PFC boost branches, each PFC boost branch comprising:
the first end of the second inductor is the input end of the PFC boost branch circuit, and the second end of the second inductor is connected with the input end of the fifth switching tube and the anode of the PFC diode; the output end of the fifth switching tube is grounded through the sixth switching tube; and the cathode of the PFC diode is connected with one end of the third capacitor, and the other end of the third capacitor is grounded.
9. The vehicle air conditioner power supply circuit according to any one of claims 1 to 8, wherein the power supply mode switching circuit comprises a first electronic switch and a second electronic switch, and the first electronic switch is arranged in series between the alternating current power supply input end and the first input end of the power supply mode switching circuit;
the second electronic switch is arranged between the input end of the direct current power supply and the second input end of the power supply mode switching circuit in series.
10. An on-vehicle air conditioner characterized by comprising the on-vehicle air conditioner power supply circuit according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022855005.6U CN214176983U (en) | 2020-12-01 | 2020-12-01 | Vehicle-mounted air conditioner power supply circuit and vehicle-mounted air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022855005.6U CN214176983U (en) | 2020-12-01 | 2020-12-01 | Vehicle-mounted air conditioner power supply circuit and vehicle-mounted air conditioner |
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| CN214176983U true CN214176983U (en) | 2021-09-10 |
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| CN202022855005.6U Active CN214176983U (en) | 2020-12-01 | 2020-12-01 | Vehicle-mounted air conditioner power supply circuit and vehicle-mounted air conditioner |
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