阅读说明：本技术 供电控制电路和车载空调 (Power supply control circuit and vehicle-mounted air conditioner ) 是由 霍兆镜 于 2019-10-31 设计创作，主要内容包括：本发明提出了一种供电控制电路和车载空调。其中,供电控制电路包括：升压电路,升压电路被配置为对待输入至负载的供电电压进行电压转换,升压电路具体包括：倍压组件,倍压组件被配置能够存储或释放升压电路输入端提供的供电电压,其中,倍压组件设置至少两组,至少两组倍压组件相互连接。本发明提供的供电控制电路,一方面,实现了拋负载能量吸收的能力,省去电压抑制电路,避免增加器件导致的额外成本,另一方面,能够把充分利用吸收的能力,高效地把输入电压升高,为后续的负载提供电能,解决了采用低压驱动负载带来的问题。(The invention provides a power supply control circuit and a vehicle-mounted air conditioner. Wherein, power supply control circuit includes: the boost circuit, boost circuit are configured to be treated the power supply voltage who inputs to the load and carry out voltage conversion, and boost circuit includes specifically: the voltage-multiplying component is configured to store or release a power supply voltage provided by the input end of the booster circuit, wherein the voltage-multiplying components are arranged in at least two groups, and the at least two groups of voltage-multiplying components are connected with each other. The power supply control circuit provided by the invention realizes the energy absorption capacity of a parabolic load, saves a voltage suppression circuit, avoids additional cost caused by adding devices, and can efficiently raise the input voltage by fully utilizing the absorption capacity to provide electric energy for subsequent loads, thereby solving the problem caused by adopting a low-voltage driving load.)

1. A power supply control circuit, comprising:

the boost circuit is configured to perform voltage conversion on a power supply voltage to be input to a load, and specifically includes:

a voltage-multiplying component configured to store or release a supply voltage provided by the boost circuit input,

the voltage doubling assemblies are arranged in at least two groups, and the at least two groups of voltage doubling assemblies are connected with each other.

2. The power supply control circuit according to claim 1, wherein the voltage boost circuit further comprises:

a switching device connected with the voltage-multiplying component, the switching device being configured to control the voltage-multiplying component to be turned on or off;

the energy storage assembly, the one end of energy storage assembly with voltage doubling subassembly is connected, the other end of energy storage assembly with boost circuit's output is connected, the energy storage assembly is configured to transmit after the supply voltage boost conversion that voltage doubling subassembly released to boost circuit's output.

3. The power supply control circuit of claim 2,

the voltage doubling assembly comprises a first voltage doubling assembly and a second voltage doubling assembly;

the first voltage doubling component comprises a first inductor, a first capacitor and a first diode;

the second voltage-multiplying component comprises a second inductor, a second capacitor and a second diode;

a common end between the first inductor and the second inductor is connected to an input end of the booster circuit;

one end of the first capacitor is connected to the first inductor, and the other end of the first capacitor is connected to the second inductor through the second diode;

one end of the second capacitor is connected to the second inductor, and the other end of the second capacitor is connected to the first inductor through the first diode.

4. The power supply control circuit of claim 3,

the switching device comprises a first switching device and a second switching device;

the first switching device is connected to a common terminal between the first capacitor and the first inductor;

the second switching device is connected to a common terminal between the second capacitance and the second inductance.

5. The power supply control circuit of claim 4,

the energy storage assembly comprises a third diode and an electrolytic capacitor which are connected in series;

the third diode is connected to a common terminal between the first capacitor and the second capacitor;

the common terminal among the electrolytic capacitor, the first switching device and the second switching device is connected to the output terminal of the booster circuit.

6. The power supply control circuit of claim 5,

the first switch device is conducted, and the input end of the booster circuit charges the first inductor;

the second switch device is conducted, and the input end of the booster circuit charges the second inductor;

the first switching device is turned off and the second switching device is turned on, and the first inductor discharges to the electrolytic capacitor through the first capacitor and the third diode and discharges to the second capacitor through the first diode;

the second switching device is turned off and the first switching device is turned on, and the second inductor discharges to the electrolytic capacitor through the second capacitor and the third diode and discharges to the first capacitor through the second diode.

7. The power supply control circuit of claim 2, wherein the boost circuit further comprises:

a zener diode connected in parallel with the switching device, the zener diode configured to filter voltage fluctuations during operation of the switching device.

8. The power supply control circuit according to any one of claims 2 to 7,

the switching device comprises at least one of a metal oxide semiconductor field effect transistor, an insulated gate bipolar transistor and a diode,

the gate of the metal oxide semiconductor field effect transistor is connected to an instruction output end, a reverse freewheeling diode is connected between the source electrode and the drain electrode of the metal oxide semiconductor field effect transistor, the base electrode of the insulated gate bipolar transistor is connected to the instruction output end, and the reverse freewheeling diode is connected between the emitter electrode and the collector electrode of the insulated gate bipolar transistor.

9. The power supply control circuit according to claim 5 or 6,

the capacitance value range of the electrolytic capacitor comprises 10uF to 2000 uF.

10. The power supply control circuit according to any one of claims 1 to 7, further comprising:

a power supply configured to provide a supply voltage;

an inverter circuit configured to supply power to the load according to the converted voltage control power supply signal;

a controller configured to output a control instruction and control the boost circuit to operate at a preset switching frequency and duty ratio;

the power supply, the inverter circuit and the controller are connected with the booster circuit.

11. An in-vehicle air conditioner, characterized by comprising:

a load;

the power supply control circuit of any one of claims 1 to 10 connected to the load, the power supply control circuit configured to control a power supply signal to power the load.

12. The vehicle air conditioner according to claim 11,

the load is a fan and/or a compressor.

Technical Field

The invention relates to the technical field of air conditioners, in particular to a power supply control circuit and a vehicle-mounted air conditioner.

Background

At present, a vehicle-mounted battery powered air conditioner in a gasoline vehicle directly adopts a battery to drive the air conditioner, a compressor in the air conditioner also adopts battery voltage to drive the air conditioner to operate, but the battery voltage is adopted to directly drive the compressor, the compressor needs to be wound by using a very thick copper wire, the manufacturing cost of the compressor and the size of the compressor are large, the compressor is not beneficial to production and use, a load throwing voltage exists in the vehicle, the highest value of the load throwing voltage is 5-10 times of the battery voltage, if a power supply circuit is connected with an inverter circuit, the compression resistance requirement on the inverter circuit is high, and a voltage suppression circuit is required to be adopted for protection.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art or the related art.

To this end, a first aspect of the present invention provides a power supply control circuit.

A second aspect of the present invention is to provide a vehicle air conditioner.

In view of the above, according to a first aspect of the present invention, a power supply control circuit is provided, including: the boost circuit, boost circuit are configured to be treated the power supply voltage who inputs to the load and carry out voltage conversion, and boost circuit includes specifically: the voltage-multiplying component is configured to store or release a power supply voltage provided by the input end of the booster circuit, wherein the voltage-multiplying components are arranged in at least two groups, and the at least two groups of voltage-multiplying components are connected with each other.

The power supply control circuit provided by the invention considers that the storage battery of the automobile is charged by the generator of the automobile, when the generator is suddenly disconnected from the generator in the running process, the generator serving as an inductive device causes voltage compensation under the condition of current reduction to maintain the current unchanged, the voltage of the generator rises instantly, and if the electric appliance mounted on the generator has no capacity to consume the energy, the electric appliance is damaged. Therefore, the booster circuit absorbs the overhigh voltage, when the power supply control circuit works, the current can be stored in the multiple voltage doubling assemblies and is finally transferred to the energy storage assembly to be used by a load, on one hand, the energy absorption capacity of the load can be realized, the voltage suppression circuit is omitted, the extra cost caused by the increase of devices is avoided, on the other hand, the absorption capacity can be fully utilized, the input voltage can be efficiently increased, the electric energy is provided for the subsequent load, and the problem caused by the adoption of the low-voltage driving load is solved.

In addition, according to the power supply control circuit in the above technical solution provided by the present invention, the following additional technical features may be further provided:

in any one of the above technical solutions, further, the voltage boost circuit further includes: the switching device is connected with the voltage-multiplying component and is configured to control the voltage-multiplying component to be switched on or switched off; the energy storage subassembly, the one end and the voltage doubling subassembly of energy storage subassembly are connected, and the other end and the output of boost circuit of energy storage subassembly are connected, and the energy storage subassembly is configured to transmit the output to boost circuit after the power supply voltage boost conversion of voltage doubling subassembly release.

In this technical scheme, switching device and voltage doubling subassembly are connected for control voltage doubling subassembly switches on or cuts off, every a set of in the multiunit voltage doubling subassembly all corresponds a switching device, and a plurality of switching device work in turn, when switching device switches on, the electric energy of power supply control circuit input can be stored in voltage doubling subassembly, when switching device cuts off, voltage doubling subassembly release stored electric energy to energy storage subassembly, so that energy storage subassembly superposes the electric energy, thereby realize supply voltage's the conversion that steps up.

In any of the above technical solutions, further, the voltage doubling assembly includes a first voltage doubling assembly and a second voltage doubling assembly; the first voltage doubling component comprises a first inductor, a first capacitor and a first diode; the second voltage-multiplying component comprises a second inductor, a second capacitor and a second diode; the common end between the first inductor and the second inductor is connected to the input end of the booster circuit; one end of the first capacitor is connected to the first inductor, and the other end of the first capacitor is connected to the second inductor through the second diode; one end of the second capacitor is connected to the second inductor, and the other end of the second capacitor is connected to the first inductor through the first diode.

In the technical scheme, each group of voltage doubling components comprises an inductor, a capacitor and a diode, wherein a first inductor and a second inductor are connected to an input end of a booster circuit to store electric energy at the input end, one end of the first capacitor is connected to the first inductor, the other end of the first capacitor is connected to the second inductor through a second diode, one end of the second capacitor is connected to the second inductor, the other end of the second capacitor is connected to the first inductor through a first diode to realize the mutual connection of the first voltage doubling component and the second voltage doubling component, when the first inductor releases electric energy, a part of electric energy flows into the energy storage component, a part of electric energy flows into the second capacitor through the first diode, similarly, when the second inductor releases electric energy, a part of electric energy flows into the energy storage component, a part of electric energy flows into the first capacitor through the second diode, and the capacitor which stores electric energy can also release electric energy to the energy storage component, therefore, the switching loss is reduced, and the circuit conversion efficiency is improved.

In any of the above technical solutions, further, the switching device includes a first switching device and a second switching device; the first switch device is connected to a common terminal between the first capacitor and the first inductor; the second switching device is connected to a common terminal between the second capacitor and the second inductor.

In the technical scheme, the output voltage of the boosting circuit is controlled by changing the switching frequency of the first switching device and the second switching device, so that the boosting function is realized.

In any of the above technical solutions, further, the energy storage component includes a third diode and an electrolytic capacitor connected in series; the third diode is connected to the common terminal between the first capacitor and the second capacitor; the common terminal among the electrolytic capacitor, the first switching device and the second switching device is connected to the output terminal of the booster circuit.

In the technical scheme, the energy storage assembly comprises a third diode and an electrolytic capacitor which are connected in series, and electric energy released by the inductor and/or the capacitor is transmitted into the electrolytic capacitor, so that the output voltage of the booster circuit is boosted, and the boosting stability is ensured by the third diode.

In any of the above technical solutions, further, the first switching device is turned on, and the input terminal of the voltage boost circuit charges the first inductor; the second switch device is conducted, and the input end of the booster circuit charges the second inductor; the first switch device is turned off, the second switch device is turned on, and the first inductor discharges to the electrolytic capacitor through the first capacitor and the third diode and discharges to the second capacitor through the first diode; the second switch device is turned off, the first switch device is turned on, and the second inductor discharges to the electrolytic capacitor through the second capacitor and the third diode and discharges to the first capacitor through the second diode; the first switch device and the second switch device are both turned off, the first inductor discharges to the electrolytic capacitor through the first diode and the third diode, and the second inductor discharges to the electrolytic capacitor through the second diode and the third diode.

In the technical scheme, when the booster circuit works, the switching device works according to a certain duty ratio, the duty ratio is determined according to the voltage required to be output by the booster circuit, when the first switching device is switched on, the voltage at the input end of the booster circuit is loaded at two ends of the first inductor, the current of the first inductor starts to rise, and the electric energy is stored in the first inductor; when the second switch device is conducted, the voltage at the input end of the booster circuit is loaded at two ends of the second inductor, the current of the second inductor starts to rise, and the electric energy is stored in the second inductor; when the first switch device is turned off and the second switch device is turned on, the energy stored in the first inductor starts to be released, two release paths are provided, one is to discharge to the electrolytic capacitor through the first capacitor and the third diode, the other is to reach the second capacitor through the first diode, and one end of the second capacitor is connected with the ground end due to the turn-on of the second switch device, namely the potential of the end is 0V, namely the voltage at two ends of the second capacitor is consistent with the voltage loaded on the second switch device; when the second switch device is turned off and the first switch device is turned on, the energy stored in the second inductor begins to be released, two release paths are provided, one is to discharge to the electrolytic capacitor through the second capacitor and the third diode, the other is to reach the first capacitor through the second diode, and one end of the first capacitor is connected with the ground end due to the turn-on of the first switch device, namely the potential of the end is 0V, namely the voltage at two ends of the first capacitor is consistent with the voltage loaded on the first switch device, furthermore, because the second capacitor stores the electric energy released by the first inductor, the voltage loaded at two ends of the second switch device is the difference between the output voltage of the booster circuit and the voltage at two ends of the second capacitor, thereby reducing the voltage loaded at two ends of the second switch device, and enabling the booster circuit to use the switch device bearing the voltage lower than the input voltage or to take the same price, but the switching element with more excellent performance improves the circuit conversion efficiency and can effectively reduce the cost while realizing the boost conversion of the booster circuit.

Similarly, after the first capacitor stores the electric energy released by the second inductor, the first switching device is turned off again, and the voltage loaded across the first switching device is the difference between the output voltage of the boost circuit and the voltage across the first capacitor, so that the voltage loaded across the first switching device is reduced.

Further, when the booster circuit stops working, the first switching device and the second switching device are both cut off, and the power supply voltage at the input end of the booster circuit reaches the electrolytic capacitor through the first inductor, the first diode and the third diode and reaches the electrolytic capacitor through the second inductor, the second diode and the third diode.

In any one of the above technical solutions, further, the voltage boost circuit further includes: a zener diode connected in parallel with the switching device, the zener diode configured to filter voltage fluctuations during operation of the switching device.

In this solution, when the circuit suddenly turns off the switching device during a heavy load, the energy in the first inductor will flow through two paths: through the first capacitor to the third diode and through the first diode to the second capacitor; the energy on the second inductor will flow through two paths: through the second capacitor to the third diode and the second diode to the first capacitor. If the energy of the inductor is large, the voltage on the first capacitor and the voltage on the second capacitor are increased to the output voltage, at the moment, the low-voltage switching device cannot bear the damage phenomenon caused by the overhigh electric energy, and the voltage stabilizing diodes are connected in parallel at the two ends of the switching device, so that the energy of the voltage exceeding the voltage resistance part of the switching device can be absorbed, and the switching device is protected.

In any of the above technical solutions, further, the switching device includes at least one of a metal oxide semiconductor field effect transistor, an insulated gate bipolar transistor, and a diode, where a gate of the metal oxide semiconductor field effect transistor is connected to the command output terminal, a reverse freewheel diode is connected between a source and a drain of the metal oxide semiconductor field effect transistor, a base of the insulated gate bipolar transistor is connected to the command output terminal, and a reverse freewheel diode is connected between an emitter and a collector of the insulated gate bipolar transistor.

In the technical solution, the first switch device and the second switch device have the same structure, and in practical application, the first switch device and the second switch device may have multiple options, for example, an IGBT (Insulated Gate bipolar Transistor) or a MOSFET (Metal Oxide Semiconductor field effect Transistor) may be used. When the IGBT is adopted, each switching device comprises a triode and a diode, the collector of the triode is connected with the cathode of the diode to form the first end of the switching device, and the emitter of the triode is connected with the anode of the diode to form the second end of the switching device; when the MOSFET is adopted, each switching device comprises an MOS tube and a diode, the source electrode of the MOS tube is connected with the cathode of the diode to form a first end of the switching device, and the drain electrode of the MOS tube is connected with the anode of the diode to form a second end of the switching device.

In any of the above technical solutions, further, the capacitance range of the electrolytic capacitor includes 10uF to 2000 uF.

In any of the above technical solutions, further, the method further includes: a power supply configured to provide a supply voltage; the inverter circuit is configured to control the power supply signal to supply power to the load according to the converted voltage; the controller is configured to output a control instruction and control the booster circuit to work according to a preset switching frequency and a preset duty ratio; the power supply, the inverter circuit and the controller are connected with the booster circuit.

In the technical scheme, electric energy is provided for a load through a power supply, specifically, the power supply voltage of the power supply is boosted through a booster circuit to obtain direct current high voltage, and then the direct current high voltage is provided for a high-voltage load in equipment; if the load is a compressor, the compressor is a direct current synchronous motor, so an inverter circuit is required to be adopted for driving; the controller is connected with a switching device in the booster circuit to control the booster circuit to work according to the preset switching frequency and the preset duty ratio.

Specifically, the power supply voltage of the power supply is any one of: 12V, 24V and 48V, and the booster circuit can boost the direct current of 12V, 24V and 48V to 200V to 300V direct current so as to provide the direct current for the high-voltage direct current load.

According to a second aspect of the present invention, a vehicle air conditioner is provided, which includes a load and the power supply control circuit of any one of the above, the power supply control circuit being connected to the load, the power supply control circuit being configured to control a power supply signal to supply power to the load. Therefore, the vehicle air conditioner has all the advantages of the power supply control circuit.

Further, the load is a fan and/or a compressor.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic diagram of a power supply control circuit according to an embodiment of the invention;

FIG. 2 is a schematic diagram of a power supply control circuit according to another embodiment of the present invention;

FIG. 3 illustrates a power control circuit configuration diagram of one embodiment of the present invention;

fig. 4 shows a waveform diagram of a duty cycle of a switching device in a power supply control circuit according to an embodiment of the invention.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.