WO2023280108A1 - 适于变频设备的电压控制电路及变频设备 - Google Patents

适于变频设备的电压控制电路及变频设备 Download PDF

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Publication number
WO2023280108A1
WO2023280108A1 PCT/CN2022/103656 CN2022103656W WO2023280108A1 WO 2023280108 A1 WO2023280108 A1 WO 2023280108A1 CN 2022103656 W CN2022103656 W CN 2022103656W WO 2023280108 A1 WO2023280108 A1 WO 2023280108A1
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WIPO (PCT)
Prior art keywords
voltage
capacitor
frequency conversion
control circuit
rectifier bridge
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PCT/CN2022/103656
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English (en)
French (fr)
Inventor
谢良柱
戢明
余道军
徐甲红
张玉婷
Original Assignee
合肥华凌股份有限公司
合肥美的电冰箱有限公司
美的集团股份有限公司
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Publication of WO2023280108A1 publication Critical patent/WO2023280108A1/zh

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
    • H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters

Definitions

  • the present application relates to the technical field of equipment control, in particular to a voltage control circuit suitable for frequency conversion equipment and frequency conversion equipment.
  • Existing frequency conversion equipment is equipment equipped with frequency converters. Different frequency conversion devices, for different sales regions, have different operating voltages for a certain load (such as the heater in the refrigerator, ice crushing motor, etc.), resulting in different models and performances of the load.
  • a certain load such as the heater in the refrigerator, ice crushing motor, etc.
  • the control board of the frequency conversion equipment will trigger the switch, so that the AC voltage output by the voltage output unit can be directly input into the load as the working voltage to ensure that the load
  • This control method can be adapted to the existing equipment with differentiated power supply conditions, but it cannot realize the use of the same type of load under different working conditions, and it is difficult to improve product standardization and manufacturing efficiency.
  • This application aims to solve at least one of the technical problems existing in the prior art. For this reason, this application proposes a voltage control circuit suitable for frequency conversion equipment, which can realize the conversion of working condition voltage into standard voltage, so that the same type of load can be used on equipment with different working condition voltage, improve product standardization, and improve product quality. manufacturing efficiency.
  • the voltage control circuit suitable for frequency conversion equipment includes:
  • a voltage output unit for outputting an AC voltage
  • a voltage conversion unit configured to convert the AC voltage into a DC voltage, and the DC voltage is used to provide a required voltage to a load in the frequency conversion device;
  • the frequency conversion device is configured with a frequency converter including an AC-DC conversion unit and a DC-AC conversion unit, and the voltage conversion unit and the AC-DC conversion unit share at least the same rectifier bridge.
  • the AC voltage used as the working condition voltage is output through the AC-DC channel of the frequency converter in the frequency conversion equipment to output the required voltage suitable for the load, so as to realize the control of the working condition voltage Converting to standard voltage enables the same type of load to be used on equipment with different operating voltages, improving product standardization and improving product manufacturing efficiency.
  • the voltage conversion unit includes a rectifier bridge, a first capacitor, a second capacitor, and a first jumper, wherein:
  • the input terminal of the rectifier bridge is connected to the voltage output unit, and the output terminal of the rectifier bridge is connected to the load;
  • One end of the first capacitor is connected to one end of the second capacitor, the other end of the first capacitor is connected to the positive output terminal of the rectifier bridge, and the other end of the second capacitor is connected to the rectifier bridge The negative output terminal;
  • the other end of the first capacitor is also connected to the external voltage input terminal, and the other end of the second capacitor is also connected to the ground;
  • One end of the first jumper wire is connected to the input end of the rectifier bridge, and the other end is connected to the connection between the first capacitor and the second capacitor.
  • the voltage conversion unit includes a rectifier bridge, a second jumper and a second capacitor, wherein:
  • the input terminal of the rectifier bridge is connected to the voltage output unit, and the output terminal of the rectifier bridge is connected to the load;
  • One end of the second jumper is connected to one end of the second capacitor, the other end of the second jumper is connected to the positive output of the rectifier bridge, and the other end of the second capacitor is connected to the The negative output terminal of the rectifier bridge;
  • the other end of the second jumper is also connected to the external voltage input end, and the other end of the second capacitor is also connected to the ground.
  • the voltage control circuit further includes a switch unit, the switch unit is turned off by a control signal output from the control board of the frequency conversion device; one end of the switch unit is connected to the rectifier bridge output terminal, and the other terminal is connected to the load.
  • both the first capacitor and the second capacitor are electrolytic capacitors, the positive pole of the first capacitor is connected to the positive output terminal of the rectifier bridge, and the negative pole of the second capacitor is connected to the positive output terminal of the rectifier bridge. The negative output terminal of the rectifier bridge is connected.
  • the first voltage range is 110V-120V.
  • the second voltage range is 220V-230V.
  • the voltage value of the external voltage input terminal is configured to be 310V.
  • the frequency conversion device includes the above-mentioned voltage control circuit.
  • the load is a heater or an ice crushing motor.
  • the voltage conversion unit adopts a corresponding structure to realize fast conversion of the voltage and enhance the adaptability of the circuit.
  • the load can be started through the switch to avoid long-term work of the load and waste of energy.
  • Fig. 1 is a schematic structural diagram of a voltage control circuit provided by the prior art
  • Fig. 2 is a schematic diagram of the use of the voltage control circuit provided by the embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of a voltage control circuit provided in an embodiment of the present application.
  • Fig. 4 is another specific structural schematic diagram of the voltage control circuit provided by the embodiment of the present application.
  • Fig. 5 is another specific structural schematic diagram of the voltage control circuit provided by the embodiment of the present application.
  • Fig. 6 is another specific structural schematic diagram of the voltage control circuit provided by the embodiment of the present application.
  • Fig. 7 is a schematic structural diagram of an inverter refrigerator provided by an embodiment of the present application.
  • FIG. 1 illustrates a schematic structural diagram of a voltage control circuit provided by the present application.
  • the voltage control circuit is suitable for frequency conversion equipment.
  • the frequency conversion equipment is a device equipped with a frequency converter, which can change the power supply frequency, thereby adjusting the load and reducing power consumption. Reduce loss and prolong the service life of equipment.
  • the voltage control circuit can be configured in frequency conversion equipment, which can realize the conversion of working condition voltage to standard voltage, so that the same type of load can be used on equipment with different working condition voltage, improve product standardization, and improve product manufacturing efficiency.
  • the voltage control circuit includes a voltage output unit 11 and a voltage conversion unit 12, wherein:
  • a voltage output unit 11 configured to output an AC voltage as a working voltage
  • the voltage conversion unit 12 is configured to perform AC-DC conversion on the AC voltage and convert it into a DC voltage, which is the load (the first load 13 in FIG. required voltage.
  • a DC voltage which is the load (the first load 13 in FIG. required voltage.
  • the heater needs to be activated, or in the ice crushing scene of the inverter refrigerator, the ice crushing motor needs to be activated.
  • the frequency converter 20 has an AC-DC-AC conversion function, that is to say, the frequency converter has an AC-DC conversion channel, and the AC-DC conversion channel first realizes AC-DC conversion.
  • the compressor in the inverter refrigerator will be controlled by the AC-DC-AC conversion action of the inverter, and the heater in the inverter refrigerator will be controlled by the voltage control circuit of this application.
  • the AC-DC-AC conversion function of the frequency converter in the frequency conversion device can be divided into the AC-DC conversion unit 201 and the DC-AC conversion unit 202 .
  • the voltage conversion unit 12 and the AC-DC conversion unit 201 of the present application share at least the same rectifier bridge.
  • the rectifier bridge is the main body of voltage conversion, and the rectifier bridge is firstly configured in the AC-DC conversion unit of the frequency converter.
  • the voltage control circuit of the present application can directly borrow the complete circuit structure of the AC-DC conversion unit, and connect the lines drawn from the AC-DC conversion unit to the load, or only use the rectifier bridge in the AC-DC conversion unit, and then add Other components form a new circuit structure, and the new circuit structure leads to the connection with the load.
  • the AC-DC conversion unit can be used as the voltage conversion unit of the present application, and a new circuit structure can also be used as the voltage conversion unit of the present application, that is, the voltage conversion unit and the AC-DC conversion unit share at least the same rectifier bridge.
  • the change in this application is equivalent to improving the circuit of the frequency converter in the frequency conversion equipment, using the AC-DC conversion function to directly connect the converted standard voltage to the load.
  • the voltage control circuit suitable for frequency conversion equipment realizes the conversion of the working condition voltage into Standard voltage enables the same type of load to be used on equipment with different operating voltages, which improves product standardization and product manufacturing efficiency.
  • the voltage conversion unit adopts a corresponding structure, which can realize fast conversion of voltage and enhance the adaptability of the circuit.
  • the specific structure of the voltage conversion unit shown in FIG. 2 and FIG. 3 can be used.
  • the specific structure of the voltage conversion unit shown in FIG. 4 and FIG. 5 can be used.
  • FIG. 2 illustrates a schematic structural diagram of a voltage control circuit provided by the present application.
  • the voltage control circuit is suitable for a frequency conversion device, and the frequency conversion device is a device equipped with a frequency converter.
  • Different frequency conversion devices for different sales regions, have different operating voltages for a certain load (such as the heater in the refrigerator, ice crushing motor, etc.), resulting in different models and performances of the load.
  • the voltage control circuit can be configured in frequency conversion equipment, which can realize the conversion of working condition voltage to standard voltage, so that the same type of load can be used on equipment with different working condition voltage, improve product standardization, and improve product manufacturing efficiency.
  • the voltage control circuit includes a voltage output unit 11 and a voltage conversion unit 12, wherein:
  • a voltage output unit 11 configured to output an AC voltage as a working voltage
  • the voltage conversion unit 12 is configured to perform AC-DC conversion on the AC voltage and convert it into a DC voltage, which is the load (the first load 13 in FIG. required voltage;
  • the voltage conversion unit 12 includes a rectifier bridge 121, a first capacitor 122, a second capacitor 123 and a first jumper 124, wherein:
  • the two input terminals (AC) of the rectifier bridge are respectively connected to the two output terminals (L and N) of the voltage output unit, and the two output terminals (V+ and V-) of the rectifier bridge are connected to the first load.
  • One end of the first capacitor EC1 is connected to one end of the second capacitor EC2, the other end of the first capacitor EC1 is connected to the positive output terminal V+ of the rectifier bridge, and the other end of the second capacitor EC2 is connected to the negative output terminal V- of the rectifier bridge.
  • the other end of the first capacitor EC1 is also connected to the external voltage input terminal 310V, and the other end of the second capacitor EC2 is also connected to the ground GND.
  • One end of the first jumper JP1 is connected to the input terminal AC of the rectifier bridge, and the other end is connected to the connection point of the first capacitor EC1 and the second capacitor EC2.
  • the voltage output unit outputs the AC voltage as the operating voltage, and the AC voltage is converted into a 310V DC voltage (that is, based on the external voltage) through the rectifier bridge, capacitors and jumpers.
  • the DC voltage is used as the operating voltage of the first load.
  • first capacitor EC1 and the second capacitor EC2 can be electrolytic capacitors. At this time, referring to FIG. The negative output terminal of the bridge is connected to V-.
  • the voltage control circuit further includes a switch unit 14 , which is triggered by a control signal output by the control board of the frequency conversion device to complete opening or closing.
  • a switch unit 14 which is triggered by a control signal output by the control board of the frequency conversion device to complete opening or closing.
  • the switch unit When the switch unit is turned on, the voltage output unit, the voltage conversion unit and the load cannot form a loop, and the load cannot obtain the converted working voltage; when the switch unit is turned off, the voltage output unit, the voltage conversion unit and the load can form a loop, and the load can obtain the converted working voltage. working voltage.
  • the switch unit is connected to the output terminal V+ of the rectifier bridge, and the other end is connected to one end of the first load.
  • the switch unit may be a relay or other switches.
  • the first load needs to be started in a preset working scenario and start the corresponding work.
  • the heater (that is, the first load) of the frequency conversion refrigerator can only be started and work in the defrosting scene, or the ice crushing motor of the frequency conversion refrigerator can only be started and work in the ice crushing scene.
  • control board in the frequency conversion device it is necessary for the control board in the frequency conversion device to send a control signal to the switch unit when it detects that the current state data of the frequency conversion device satisfies the preset working scene, so that the switch unit is closed and the voltage output unit, rectifier bridge, and capacitor are connected. , the jumper and the first load, so as to realize the purpose of the voltage control circuit to provide the first load with a DC voltage.
  • control board of the frequency conversion refrigerator detects that the frost in the freezing chamber of the refrigerator exceeds the preset standard, then the control board judges that the refrigerator has reached the defrosting condition, and at this time, sends a control signal to the switch unit to control the switch unit to close.
  • FIG. 4 illustrates a schematic structural diagram of a voltage control circuit provided by the present application.
  • the voltage control circuit is suitable for a frequency conversion device, and the frequency conversion device is a device equipped with a frequency converter.
  • Different frequency conversion devices for different sales regions, have different operating voltages for a certain load (such as the heater in the refrigerator, ice crushing motor, etc.), resulting in different models and performances of the load.
  • the voltage control circuit can be configured in frequency conversion equipment, which can realize the conversion of working condition voltage to standard voltage, so that the same type of load can be used on equipment with different working condition voltage, improve product standardization, and improve product manufacturing efficiency.
  • the voltage control circuit includes a voltage output unit 11 and a voltage conversion unit 12, wherein:
  • a voltage output unit 11 configured to output an AC voltage as a working voltage
  • the voltage conversion unit 12 is configured to perform AC-DC conversion on the AC voltage and convert it into a DC voltage, which is the load (the first load 13 in FIG. required voltage;
  • the voltage conversion unit 12 includes a rectifier bridge 121, a second jumper 125 and a second capacitor 123, wherein:
  • the two input terminals (AC) of the rectifier bridge are respectively connected to the two output terminals (L and N) of the voltage output unit, and the two output terminals (V+ and V-) of the rectifier bridge are connected to the first load.
  • One end of the second jumper JP2 is connected to one end of the second capacitor EC2, the other end of the second jumper JP2 is connected to the positive output terminal V+ of the rectifier bridge, and the other end of the second capacitor EC2 is connected to the negative output terminal V of the rectifier bridge -.
  • the other end of the second jumper JP2 is also connected to the external voltage input terminal 310V, and the other end of the second capacitor EC2 is also connected to the ground GND.
  • the voltage output unit outputs the AC voltage as the operating voltage, and the AC voltage is converted into a 310V DC voltage (that is, based on the external voltage) through the rectifier bridge, capacitors and jumpers.
  • the DC voltage is used as the operating voltage of the first load.
  • first capacitor EC1 and the second capacitor EC2 can be electrolytic capacitors. At this time, referring to FIG. The negative output terminal of the bridge is connected to V-.
  • the voltage control circuit further includes a switch unit 14 , which is triggered by a control signal output by the control board of the frequency conversion device to complete opening or closing.
  • a switch unit 14 which is triggered by a control signal output by the control board of the frequency conversion device to complete opening or closing.
  • the switch unit When the switch unit is turned on, the voltage output unit, the voltage conversion unit and the load cannot form a loop, and the load cannot obtain the converted working voltage; when the switch unit is turned off, the voltage output unit, the voltage conversion unit and the load can form a loop, and the load can obtain the converted working voltage. working voltage.
  • the switch unit is connected to the output terminal V+ of the rectifier bridge, and the other end is connected to one end of the first load.
  • the switch unit may be a relay or other switches.
  • the first load needs to be started in a preset working scenario and start the corresponding work.
  • the heater (that is, the first load) of the frequency conversion refrigerator can only be started and work in the defrosting scene, or the ice crushing motor of the frequency conversion refrigerator can only be started and work in the ice crushing scene.
  • control board in the frequency conversion device it is necessary for the control board in the frequency conversion device to send a control signal to the switch unit when it detects that the current state data of the frequency conversion device satisfies the preset working scene, so that the switch unit is closed and the voltage output unit, rectifier bridge, and capacitor are connected. , the jumper and the first load, so as to realize the purpose of the voltage control circuit to provide the first load with a DC voltage.
  • the control board of the inverter refrigerator detects that the frost in the freezing chamber of the refrigerator exceeds the preset standard, then the control board judges that the refrigerator has reached the condition of crushing ice, and at this time, sends a control signal to the switch unit to control the switch unit to close.
  • the circuit composed of the power output unit, the rectifier bridge, the capacitor, the jumper wire and the ice crushing motor so that the ice crushing motor can crush the ice, and crush the frost in the freezing chamber.
  • the present application also provides an inverter refrigerator, which includes an inverter, and the inverter has an AC-DC-AC conversion function, that is to say, the inverter has an AC-DC conversion channel, and then has a DC -
  • the AC conversion channel, through AC-DC-AC conversion, can perform work on other loads (such as compressors) in the frequency conversion equipment in corresponding scenarios.
  • the frequency converter is divided into an AC-DC conversion unit and a DC-AC conversion unit according to the AC-DC-AC conversion function.
  • the frequency conversion refrigerator of the present application is also equipped with a voltage control circuit.
  • the voltage control circuit directly uses the AC-DC conversion unit in the frequency converter, and the lead-out line of the AC-DC conversion unit is connected to the load (heater). Therefore, the voltage control circuit of the present application includes a voltage output unit, a voltage conversion unit (AC-DC conversion unit) and a load (heater).
  • the modification of the frequency conversion refrigerator is equivalent to improving the circuit of the frequency converter in the frequency conversion refrigerator, using the AC-DC conversion function to directly connect the converted standard voltage to the load (heater).
  • Different inverter refrigerators have different operating voltages for a load (such as the heater in the refrigerator, ice crushing motor, etc.) for different sales regions, resulting in different models and performances of the load.
  • a load such as the heater in the refrigerator, ice crushing motor, etc.
  • different types of heaters have different resistance values.
  • the frequency conversion refrigerator of the embodiment of the present application by configuring the above-mentioned voltage control circuit, can realize the AC voltage as the working condition voltage through the AC-DC channel of the frequency converter in the frequency conversion equipment, and output the required voltage suitable for the load, so as to realize the
  • the operating voltage is converted to a standard voltage, so that the same type of load can be used on equipment with different operating voltages, improving product standardization and improving product manufacturing efficiency.
  • the present application also provides a frequency conversion device, the frequency conversion device includes a frequency converter, and the frequency converter has an AC-DC-AC conversion function, that is to say, the frequency converter has an AC-DC conversion channel, and then has a DC-AC conversion channel , through AC-DC-AC conversion, it is possible to perform work on other loads in the frequency conversion equipment in corresponding scenarios.
  • the frequency converter is divided into an AC-DC conversion unit and a DC-AC conversion unit according to the AC-DC-AC conversion function.
  • the frequency conversion device of the present application is also equipped with a voltage control circuit, the voltage control circuit directly uses the AC-DC conversion unit in the frequency converter, and the AC-DC conversion unit leads a line to connect with the load. Therefore, the voltage control circuit of the present application includes a voltage output unit, a voltage conversion unit (AC-DC conversion unit) and a load.
  • AC-DC conversion unit AC-DC conversion unit
  • the modification of the frequency conversion equipment is equivalent to improving the circuit of the frequency converter in the frequency conversion equipment, using the AC-DC conversion function to directly connect the converted standard voltage to the load.
  • the frequency conversion device is configured with the voltage control circuit provided above.
  • the frequency conversion equipment is a product with differentiated power supply conditions. In these products, the operating voltage is different, resulting in different models and performance of the load.
  • the frequency conversion equipment of the embodiment of the present application by configuring the above-mentioned voltage control circuit, can realize the AC voltage as the working condition voltage through the AC-DC channel of the frequency converter in the frequency conversion equipment, and output the required voltage suitable for the load, so as to realize the
  • the operating voltage is converted to a standard voltage, so that the same type of load can be used on equipment with different operating voltages, improving product standardization and improving product manufacturing efficiency.

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Abstract

本申请涉及设备控制技术领域，提供一种适于变频设备的电压控制电路及变频设备，该电路包括：电压输出单元，用于输出交流电压；电压转换单元，用于将交流电压转换为直流电压，直流电压用于向变频设备中的目标负载提供所需电压；其中，变频设备配置变频器，变频器包括交流-直流转换单元和直流-交流转换单元，电压转换单元为交流-直流转换单元。本申请提供一种适于变频设备的电压控制电路及变频设备，通过将作为工况电压的交流电压经变频设备中变频器的交流-直流通道，输出适于负载的所需电压，实现将工况电压转换为标准电压，使同款负载能够在不同工况电压的设备上使用，提升产品的标准化，提升产品制造效率。

Description

适于变频设备的电压控制电路及变频设备
相关申请的交叉引用
本申请要求于2021年07月08日提交的申请号为202110773708.0，发明名称为“适于变频设备的电压控制电路及变频设备”的中国专利申请的优先权，其通过引用方式全部并入本文。
技术领域
本申请涉及设备控制技术领域，尤其涉及适于变频设备的电压控制电路及变频设备。
背景技术
现有的变频设备为具备变频器的设备。不同的变频设备，针对不同的销售区域，对于某个负载(例如冰箱里的加热器，碎冰电机等)的工况电压存在不同，导致该负载的型号和性能也不同。
为此，对负载的工作控制过程中，在符合某种场景下，变频设备的控制板会触发开关，使得电压输出单元输出的可作为工况电压的交流电压直接输入到负载中，以保证负载的工作电压的需求，这种控制方式能够适于现有差异化电源工况的设备，但无法实现同款负载在不同工况下使用，难以提升产品的标准化和制造效率。
发明内容
本申请旨在至少解决现有技术中存在的技术问题之一。为此，本申请提出一种适于变频设备的电压控制电路，能够实现将工况电压转换为标准电压，使同款负载能够在不同工况电压的设备上使用，提升产品的标准化，提升产品制造效率。
根据本申请第一方面实施例的适于变频设备的电压控制电路，包括：
电压输出单元，用于输出交流电压；
电压转换单元，用于将所述交流电压转换为直流电压，所述直流电压用于向所述变频设备中的负载提供所需电压；
其中，所述变频设备配置有包含交流-直流转换单元和直流-交流转换单元的变频器，所述电压转换单元与所述交流-直流转换单元至少共用同一整流桥。
根据本申请实施例的适于变频设备的电压控制电路，通过将作为工况电压的交流电压经变频设备中变频器的交流-直流通道，输出适于负载的所需电压，实现将工况电压转换为标准电压，使同款负载能够在不同工况电压的设备上使用，提升产品的标准化，提升产品制造效率。
根据本申请的一个实施例，若所述交流电压处于第一电压范围内，则所述电压转换单元包括整流桥、第一电容、第二电容和第一跳线，其中：
所述整流桥的输入端与所述电压输出单元连接，所述整流桥的输出端与所述负载连接；
所述第一电容的一端与所述第二电容的一端连接，所述第一电容的另一端接入所述整流桥的正输出端，所述第二电容的另一端接入所述整流桥的负输出端；
所述第一电容的另一端还接入外部电压输入端，所述第二电容的另一端还接入地；
所述第一跳线的一端接入所述整流桥的输入端，另一端接入所述第一电容和所述第二电容的连接处。
根据本申请的一个实施例，若所述交流电压处于第二电压范围内，则所述电压转换单元包括整流桥、第二跳线和第二电容，其中：
所述整流桥的输入端与所述电压输出单元连接，所述整流桥的输出端与所述负载连接；
所述第二跳线的一端与所述第二电容的一端连接，所述第二跳线的另一端接入所述整流桥的正输出端，所述第二电容的另一端接入所述整流桥的负输出端；
所述第二跳线的另一端还接入外部电压输入端，所述第二电容的另一端还接入地。
根据本申请的一个实施例，所述电压控制电路还包括开关单元，所述开关单元由所述变频设备的控制板输出的控制信号进行关闭；所述开关单元的一端接入所述整流桥的输出端，另一端接入所述负载。
根据本申请的一个实施例，所述第一电容和所述第二电容均为电解电容，所述第一电容的正极与所述整流桥的正输出端连接，所述第二电容的负极与所述整流桥的负输出端连接。
根据本申请的一个实施例，所述第一电压范围为110V-120V。
根据本申请的一个实施例，所述第二电压范围为220V-230V。
根据本申请的一个实施例，所述外部电压输入端的电压值配置为310V。
根据本申请第二方面实施例的变频设备，包括上述的电压控制电路。
根据本申请的一个实施例，若所述变频设备为变频冰箱，则所述负载为加热器或碎冰电机。
本申请实施例中的上述一个或多个技术方案，至少具有如下技术效果之一：
进一步的，针对不同的工况电压，电压转换单元采用相对应的结构，实现对电压的快速转换，增强电路的适应性。
更进一步的，在合适的场景下，通过开关启动负载的工作，避免负载的长时间工作，浪费能源。
本申请的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本申请的实践了解到。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是现有技术提供的电压控制电路的结构示意图；
图2是本申请实施例提供的电压控制电路的使用示意图；
图3是本申请实施例提供的电压控制电路的具体结构示意图；
图4是本申请实施例提供的电压控制电路的又一具体结构示意图；
图5是本申请实施例提供的电压控制电路的另一具体结构示意图；
图6是本申请实施例提供的电压控制电路的再一具体结构示意图；
图7是本申请实施例提供的变频冰箱的结构示意图。
具体实施方式
下面结合附图和实施例对本申请的实施方式作进一步详细描述。以下实施例用于说明本申请，但不能用来限制本申请的范围。
图1示例了本申请提供的一种电压控制电路的结构示意图，该电压控制电路适用于变频设备，变频设备为具备变频器的设备，能够改变供电频率，从而调节负载，起到降低功耗，减小损耗，延长设备使用寿命等作用。
变频设备在制作及销售时，会针对不同的销售区域，进行相对应的设备定制，生成出不同的变频设备，这些变频设备中，对于某个负载(例如冰箱里的加热器，冰箱里的碎冰电机等)的工况电压存在不同，导致该负载的型号和性能也不同。
为此，该电压控制电路能够配置在变频设备中，能够实现将工况电压转换为标准电压，使同款负载能够在不同工况电压的设备上使用，提升产品的标准化，提升产品制造效率。
参见图1，该电压控制电路包括电压输出单元11和电压转换单元12，其中：
电压输出单元11，用于输出作为工况电压的交流电压；
电压转换单元12，用于将交流电压进行交流-直流转换，转换为直流电压，该直流电压为变频设备中在预设的场景下工作的负载(如图1中的第一负载13)的所需电压。例如变频冰箱在化霜场景下，需要启动加热器，或是变频冰箱在碎冰场景下，需要启动碎冰电机。
对此，需要说明的是，在变频设备中，变频器20具备交流-直流-交流的转换功能，也就是说，变频器具备交流-直流转换通道，由交流-直流转换通道先实现交流-直流的转换工作，接着又具备直流-交流转换通道，再由直流-交流转换通道实现直流-交流的转换工作。故变频设备通过交流-直流-交流的转换，能够对变频设备中的其他负载(如图1中的第二负载21)在对应的运行场景下执行对应的工作。
在这里，变频设备中的其他负载与上述电压转换单元接入的负载不同。例如变频冰箱里的压缩机会由变频器的交流-直流-交流的转换动作进行控 制，变频冰箱里的加热器会由本申请的电压控制电路进行控制。
由上述可知，变频设备中的变频器的交流-直流-交流的转换功能，可以划分为交流-直流转换单元201，以及直流-交流转换单元202。而本申请的电压转换单元12与交流-直流转换单元201至少共用同一个整流桥。该整流桥是电压转换主体，在变频器的交流-直流转换单元中首先已配置有该整流桥。本申请的电压控制电路可以直接借用交流-直流转换单元的完整电路结构，由该交流-直流转换单元引出线路与负载进行连接，也可以只借用交流-直流转换单元中的整流桥，然后新增其他元器件组建新的电路结构，由新的电路结构引出线路与负载进行连接。故可以将交流-直流转换单元作为本申请的电压转换单元，也可将新的电路结构作为本申请的电压转换单元，即电压转换单元与所述交流-直流转换单元至少共用同一整流桥。
本申请的改变相当于对变频设备中的变频器的电路进行改进，利用交流-直流转换功能，直接将转换得到的标准电压接入到负载。
本申请提供的适于变频设备的电压控制电路，通过将作为工况电压的交流电压经变频设备中变频器的交流-直流通道，输出适于负载的所需电压，实现将工况电压转换为标准电压，使同款负载能够在不同工况电压的设备上使用，提升产品的标准化，提升产品制造效率。
在本申请的进一步解释说明中，针对不同的工况电压(即不同的电压范围)，电压转换单元采用相对应的结构，能够实现对电压的快速转换，增强电路的适应性。
例如针对第一电压范围(110V-120V，一般取110V的交流电压)，可采用图2和图3所示出的电压转换单元的具体结构。
针对第二电压范围(220V-230V，一般取220V的交流电压)，可采用图4和图5所示出的电压转换单元的具体结构。
图2示例了本申请提供的一种电压控制电路的结构示意图，该电压控制电路适用于变频设备，变频设备为具备变频器的设备。不同的变频设备，针对不同的销售区域，对于某个负载(例如冰箱里的加热器，碎冰电机等)的工况电压存在不同，导致该负载的型号和性能也不同。
为此，该电压控制电路能够配置在变频设备中，能够实现将工况电压转换为标准电压，使同款负载能够在不同工况电压的设备上使用，提升产 品的标准化，提升产品制造效率。
参见图2，该电压控制电路包括电压输出单元11和电压转换单元12，其中：
电压输出单元11，用于输出作为工况电压的交流电压；
电压转换单元12，用于将交流电压进行交流-直流转换，转换为直流电压，该直流电压为变频设备中在预设的场景下工作的负载(如图1中的第一负载13)的所需电压；
电压转换单元12包括整流桥121、第一电容122、第二电容123和第一跳线124，其中：
该整流桥的两个输入端(AC)分别与电压输出单元的两个输出端(L和N)连接，整流桥的两个输出端(V+和V-)与第一负载连接。
第一电容EC1的一端与第二电容EC2的一端连接，第一电容EC1的另一端接入整流桥的正输出端V+，第二电容EC2的另一端接入整流桥的负输出端V-。
第一电容EC1的另一端还接入外部电压输入端310V，第二电容EC2的另一端还接入地GND。
第一跳线JP1的一端接入整流桥的输入端AC，另一端接入第一电容EC1和第二电容EC2的连接位置点。
对此，需要说明的是，电压输出单元输出作为工况电压的交流电压，该交流电压经过整流桥、电容及跳线的作用，转换为310V的直流电压(即以外部电压为基准)，该直流电压用作第一负载的工作电压。
另外，第一电容EC1和第二电容EC2可采用电解电容，此时，参见图4可以看出，第一电容EC1的正极与整流桥的正输出端V+连接，第二电容EC2的负极与整流桥的负输出端V-连接。
进一步的解释说明，参见图3，该电压控制电路还包括开关单元14，该开关单元接收到变频设备的控制板输出的控制信号进行触发，完成打开或关闭。开关单元打开时，电压输出单元、电压转换单元和负载不能形成回路，负载不能获取转换得到的工作电压；开关单元关闭时，电压输出单元、电压转换单元和负载能够形成回路，负载能够获取转换得到的工作电压。
由此，该开关单元的一端接入整流桥的输出端V+，另一端接入第一负载的一端。在本申请中，该开关单元可选用继电器，也可以为其他开关。
对此，需要说明的是，第一负载需要在预设的工作场景下完成启动，开始对应的工作。例如变频冰箱的加热器(即第一负载)要在化霜场景下才能启动，进行工作，或是变频冰箱的碎冰电机要在碎冰场景下才能启动，进行工作。
故需要变频设备中的控制板在检测到变频设备的当前状态数据满足预设的工作场景时，才会向开关单元发送控制信号，以使开关单元完成闭合，打通电压输出单元、整流桥、电容、跳线和第一负载组成的回路，从而实现电压控制电路为第一负载提供直流电压的目的。
例如变频冰箱的控制板检测到冰箱冰冻室内的冰霜超过预设的标准，则控制板判断冰箱达到化霜条件，此时，向开关单元发出控制信号，控制开关单元闭合。接通电源输出单元、整流桥、电容、跳线和加热器组成的回路，使得加热器进行加热，对冰冻室内的冰霜进行化除。
图4示例了本申请提供的一种电压控制电路的结构示意图，该电压控制电路适用于变频设备，变频设备为具备变频器的设备。不同的变频设备，针对不同的销售区域，对于某个负载(例如冰箱里的加热器，碎冰电机等)的工况电压存在不同，导致该负载的型号和性能也不同。
为此，该电压控制电路能够配置在变频设备中，能够实现将工况电压转换为标准电压，使同款负载能够在不同工况电压的设备上使用，提升产品的标准化，提升产品制造效率。
参见图4，该电压控制电路包括电压输出单元11和电压转换单元12，其中：
电压输出单元11，用于输出作为工况电压的交流电压；
电压转换单元12，用于将交流电压进行交流-直流转换，转换为直流电压，该直流电压为变频设备中在预设的场景下工作的负载(如图1中的第一负载13)的所需电压；
电压转换单元12包括整流桥121、第二跳线125和第二电容123，其中：
该整流桥的两个输入端(AC)分别与电压输出单元的两个输出端(L 和N)连接，整流桥的两个输出端(V+和V-)与第一负载连接。
第二跳线JP2的一端与第二电容EC2的一端连接，第二跳线JP2的另一端接入整流桥的正输出端V+，第二电容EC2的另一端接入整流桥的负输出端V-。
第二跳线JP2的另一端还接入外部电压输入端310V，第二电容EC2的另一端还接入地GND。
对此，需要说明的是，电压输出单元输出作为工况电压的交流电压，该交流电压经过整流桥、电容及跳线的作用，转换为310V的直流电压(即以外部电压为基准)，该直流电压用作第一负载的工作电压。
另外，第一电容EC1和第二电容EC2可采用电解电容，此时，参见图4可以看出，第一电容EC1的正极与整流桥的正输出端V+连接，第二电容EC2的负极与整流桥的负输出端V-连接。
进一步的解释说明，参见图5，该电压控制电路还包括开关单元14，该开关单元接收到变频设备的控制板输出的控制信号进行触发，完成打开或关闭。开关单元打开时，电压输出单元、电压转换单元和负载不能形成回路，负载不能获取转换得到的工作电压；开关单元关闭时，电压输出单元、电压转换单元和负载能够形成回路，负载能够获取转换得到的工作电压。
由此，该开关单元的一端接入整流桥的输出端V+，另一端接入第一负载的一端。在本申请中，该开关单元可选用继电器，也可以为其他开关。
对此，需要说明的是，第一负载需要在预设的工作场景下完成启动，开始对应的工作。例如变频冰箱的加热器(即第一负载)要在化霜场景下才能启动，进行工作，或是变频冰箱的碎冰电机要在碎冰场景下才能启动，进行工作。
故需要变频设备中的控制板在检测到变频设备的当前状态数据满足预设的工作场景时，才会向开关单元发送控制信号，以使开关单元完成闭合，打通电压输出单元、整流桥、电容、跳线和第一负载组成的回路，从而实现电压控制电路为第一负载提供直流电压的目的。
例如变频冰箱的控制板检测到冰箱冰冻室内的冰霜超过预设的标准，则控制板判断冰箱达到碎冰条件，此时，向开关单元发出控制信号，控制 开关单元闭合。接通电源输出单元、整流桥、电容、跳线和碎冰电机组成的回路，使得碎冰电机进行碎冰，对冰冻室内的冰霜进行碎除。
参见图7，本申请还提供一种变频冰箱，该变频冰箱包括变频器，该变频器具备交流-直流-交流的转换功能，也就是说，变频器具备交流-直流转换通道，接着又具备直流-交流转换通道，通过交流-直流-交流的转换，能够对变频设备中的其他负载(如压缩机)在对应的场景下执行工作。
由此，该变频器根据交流-直流-交流的转换的功能划分为交流-直流转换单元和直流-交流转换单元。
本申请的变频冰箱还配置有电压控制电路，该电压控制电路直接借助变频器中的交流-直流转换单元，由该交流-直流转换单元引出线路与负载(加热器)进行连接。故本申请的电压控制电路包括电压输出单元、电压转换单元(交流-直流转换单元)和负载(加热器)。
本变频冰箱的改变相当于对变频冰箱中的变频器的电路进行改进，利用交流-直流转换功能，直接将转换得到的标准电压接入到负载(加热器)。
不同的变频冰箱，针对不同的销售区域，对于某个负载(例如冰箱里的加热器，碎冰电机等)的工况电压存在不同，导致该负载的型号和性能也不同。例如不同型号的加热器的阻值不同。
本申请实施例的变频冰箱，通过配置上述的电压控制电路，能够实现将作为工况电压的交流电压经变频设备中变频器的交流-直流通道，输出适于负载的所需电压，实现将工况电压转换为标准电压，使同款负载能够在不同工况电压的设备上使用，提升产品的标准化，提升产品制造效率。
本申请还提供一种变频设备，该变频设备包括变频器，该变频器具备交流-直流-交流的转换功能，也就是说，变频器具备交流-直流转换通道，接着又具备直流-交流转换通道，通过交流-直流-交流的转换，能够对变频设备中的其他负载在对应的场景下执行工作。
由此，该变频器根据交流-直流-交流的转换的功能划分为交流-直流转换单元和直流-交流转换单元。
本申请的变频设备还配置有电压控制电路，该电压控制电路直接借助变频器中的交流-直流转换单元，由该交流-直流转换单元引出线路与负载进行连接。故本申请的电压控制电路包括电压输出单元、电压转换单元(交 流-直流转换单元)和负载。
本变频设备的改变相当于对变频设备中的变频器的电路进行改进，利用交流-直流转换功能，直接将转换得到的标准电压接入到负载。
该变频设备中配置有上述提供的电压控制电路。在这里，该变频设备为存在差异化电源工况的产品。在这些产品中，工况电压存在不同，导致该负载的型号和性能也不同。
本申请实施例的变频设备，通过配置上述的电压控制电路，能够实现将作为工况电压的交流电压经变频设备中变频器的交流-直流通道，输出适于负载的所需电压，实现将工况电压转换为标准电压，使同款负载能够在不同工况电压的设备上使用，提升产品的标准化，提升产品制造效率。
最后应说明的是：以上实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的精神和范围。
以上实施方式仅用于说明本申请，而非对本申请的限制。尽管参照实施例对本申请进行了详细说明，本领域的普通技术人员应当理解，对本申请的技术方案进行各种组合、修改或者等同替换，都不脱离本申请技术方案的精神和范围，均应涵盖在本申请的权利要求范围中。

Claims (10)

  1. 一种适于变频设备的电压控制电路，包括：
    电压输出单元，用于输出交流电压；
    电压转换单元，用于将所述交流电压转换为直流电压，所述直流电压用于向所述变频设备中的负载提供所需电压；
    其中，所述变频设备配置有包含交流-直流转换单元和直流-交流转换单元的变频器，所述电压转换单元与所述交流-直流转换单元至少共用同一整流桥。
  2. 根据权利要求1所述的适于变频设备的电压控制电路，其中，若交流电压处于第一电压范围内，则电压转换单元包括整流桥、第一电容、第二电容和第一跳线，其中：
    所述整流桥的输入端与所述电压输出单元连接，输出端与所述负载连接；
    所述第一电容的一端与所述第二电容的一端连接，第一电容的另一端接入整流桥的正输出端，第二电容的另一端接入整流桥的负输出端；
    所述第一电容的另一端接入外部电压输入端，所述第二电容的另一端接地；
    所述第一跳线的一端接入整流桥的输入端，另一端接入第一电容和第二电容的连接处。
  3. 根据权利要求1所述的适于变频设备的电压控制电路，其中，若交流电压处于第二电压范围内，则电压转换单元包括整流桥、第二跳线和第二电容，其中：
    所述整流桥的输入端与所述电压输出单元连接，输出端与所述负载连接；
    所述第二跳线的一端与所述第二电容的一端连接，第二跳线的另一端接入整流桥的正输出端，第二电容的另一端接入所述整流桥的负输出端；
    所述第二跳线的另一端接入外部电压输入端，所述第二电容的另一端接地。
  4. 根据权利要求2或3所述的适于变频设备的电压控制电路，其中，所述电压控制电路还包括开关单元，开关单元由变频设备的控制板输 出的控制信号进行关闭；所述开关单元的一端接入整流桥的输出端，另一端接入所述负载。
  5. 根据权利要求2所述的适于变频设备的电压控制电路，其中，所述第一电容和所述第二电容均为电解电容，第一电容的正极与整流桥的正输出端连接，第二电容的负极与整流桥的负输出端连接。
  6. 根据权利要求2所述的适于变频设备的电压控制电路，其中，所述第一电压范围为110V-120V。
  7. 根据权利要求3所述的适于变频设备的电压控制电路，其中，所述第二电压范围为220V-230V。
  8. 根据权利要求2或3所述的适于变频设备的电压控制电路，其中，所述外部电压输入端的电压值为310V。
  9. 一种变频设备，包括上述权利要求1-7中任一权项所述的电压控制电路。
  10. 根据权利要求1所述的变频设备，其中，若所述变频设备为变频冰箱，则所述负载为加热器或碎冰电机。
PCT/CN2022/103656 2021-07-08 2022-07-04 适于变频设备的电压控制电路及变频设备 WO2023280108A1 (zh)

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CN215268089U (zh) * 2021-07-08 2021-12-21 合肥华凌股份有限公司 适于变频设备的电压控制电路及变频设备

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JP2005137168A (ja) * 2003-10-31 2005-05-26 Hitachi Home & Life Solutions Inc 負荷駆動装置
CN101577484A (zh) * 2008-05-08 2009-11-11 海尔集团公司 一种变频空调外机开关电源的供电装置
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