CN115603596A - Voltage control circuit suitable for frequency conversion equipment and frequency conversion equipment - Google Patents
Voltage control circuit suitable for frequency conversion equipment and frequency conversion equipment Download PDFInfo
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- CN115603596A CN115603596A CN202110773708.0A CN202110773708A CN115603596A CN 115603596 A CN115603596 A CN 115603596A CN 202110773708 A CN202110773708 A CN 202110773708A CN 115603596 A CN115603596 A CN 115603596A
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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
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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
- 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
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Abstract
The invention relates to the technical field of equipment control, and provides a voltage control circuit suitable for frequency conversion equipment and the frequency conversion equipment, wherein the circuit comprises: a voltage output unit for outputting an alternating voltage; the voltage conversion unit is used for converting alternating-current voltage into direct-current voltage, and the direct-current voltage is used for providing required voltage for a target load in the frequency conversion equipment; the frequency conversion equipment is provided with a frequency converter, the frequency converter comprises an alternating current-direct current conversion unit and a direct current-alternating current conversion unit, and the voltage conversion unit is the alternating current-direct current conversion unit. The invention provides a voltage control circuit suitable for frequency conversion equipment and the frequency conversion equipment.
Description
Technical Field
The invention relates to the technical field of equipment control, in particular to a voltage control circuit suitable for frequency conversion equipment and the frequency conversion equipment.
Background
The conventional frequency conversion device is a device provided with a frequency converter. Different frequency conversion equipment aims at different sales areas, and the working condition voltage of a certain load (such as a heater in a refrigerator, an ice crushing motor and the like) is different, so that the type and the performance of the load are different.
Therefore, in the working control process of the load, the control panel of the frequency conversion equipment can trigger the switch in accordance with a certain scene, so that the alternating voltage output by the voltage output unit can be directly input into the load as the working condition voltage, and the requirement of the working voltage of the load is met.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the voltage control circuit suitable for the frequency conversion equipment provided by the invention can convert the working condition voltage into the standard voltage, so that the same load can be used on equipment with different working condition voltages, the standardization of a product is improved, and the manufacturing efficiency of the product is improved.
According to the embodiment of the first aspect of the invention, the voltage control circuit suitable for the frequency conversion equipment comprises:
a voltage output unit for outputting an alternating voltage;
the voltage conversion unit is used for converting the alternating-current voltage into direct-current voltage, and the direct-current voltage is used for providing required voltage for a load in the frequency conversion equipment;
the frequency conversion equipment is provided with a frequency converter comprising an alternating current-direct current conversion unit and a direct current-alternating current conversion unit, and the voltage conversion unit and the alternating current-direct current conversion unit at least share the same rectifier bridge.
According to the voltage control circuit suitable for the frequency conversion equipment, the alternating-current voltage serving as the working condition voltage is output to the required voltage suitable for the load through the alternating-current-direct-current channel of the frequency converter in the frequency conversion equipment, so that the working condition voltage is converted into the standard voltage, the same type of load can be used on equipment with different working condition voltages, the standardization of products is improved, and the manufacturing efficiency of the products is improved.
According to an embodiment of the present invention, if the ac voltage is in a first voltage range, the voltage conversion unit includes a rectifier bridge, a first capacitor, a second capacitor, and a first jumper, wherein:
the input end of the rectifier bridge is connected with the voltage output unit, and the output end of the rectifier bridge is connected with the load;
one end of the first capacitor is connected with one end of the second capacitor, the other end of the first capacitor is connected to the positive output end of the rectifier bridge, and the other end of the second capacitor is connected to the negative output end of the rectifier bridge;
the other end of the first capacitor is also connected to an external voltage input end, and the other end of the second capacitor is also connected to the ground;
one end of the first jumper is connected to the input end of the rectifier bridge, and the other end of the first jumper is connected to the joint of the first capacitor and the second capacitor.
According to an embodiment of the present invention, if the ac voltage is in a second voltage range, the voltage converting unit includes a rectifier bridge, a second jumper and a second capacitor, wherein:
the input end of the rectifier bridge is connected with the voltage output unit, and the output end of the rectifier bridge is connected with the load;
one end of the second jumper is connected with one end of the second capacitor, the other end of the second jumper is connected to the positive output end of the rectifier bridge, and the other end of the second capacitor is connected to the negative output end of the rectifier bridge;
the other end of the second jumper is connected to an external voltage input end, and the other end of the second capacitor is connected to the ground.
According to an embodiment of the present invention, the voltage control circuit further includes a switching unit, the switching unit being turned off by a control signal output by a control board of the frequency conversion device; one end of the switch unit is connected to the output end of the rectifier bridge, and the other end of the switch unit is connected to the load.
According to an embodiment of the present invention, the first capacitor and the second capacitor are both electrolytic capacitors, a positive electrode of the first capacitor is connected to a positive output terminal of the rectifier bridge, and a negative electrode of the second capacitor is connected to a negative output terminal of the rectifier bridge.
According to one embodiment of the invention, the first voltage range is 110V-120V.
According to one embodiment of the invention, the second voltage range is 220V-230V.
According to one embodiment of the invention, the voltage value of the external voltage input is configured to be 310V.
The frequency conversion device according to the second aspect of the embodiment of the present invention includes the voltage control circuit described above.
According to one embodiment of the invention, if the variable frequency device is a variable frequency refrigerator, the load is a heater or an ice crushing motor.
One or more technical solutions in the embodiments of the present invention have at least one of the following technical effects:
furthermore, the voltage conversion unit adopts a corresponding structure aiming at different working condition voltages, so that the voltage is rapidly converted, and the adaptability of the circuit is enhanced.
Furthermore, under a proper scene, the load is started to work through the switch, so that the long-time work of the load is avoided, and the energy is wasted.
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
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings 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 drawings without creative efforts.
FIG. 1 is a schematic diagram of a voltage control circuit provided in the prior art;
FIG. 2 is a schematic diagram of a voltage control circuit according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a specific structure of a voltage control circuit according to an embodiment of the present invention;
fig. 4 is a schematic diagram of another specific structure of the voltage control circuit according to the embodiment of the present invention;
fig. 5 is a schematic diagram of another specific structure of the voltage control circuit according to the embodiment of the present invention;
FIG. 6 is a schematic diagram of another embodiment of a voltage control circuit according to the present invention;
FIG. 7 is a schematic structural diagram of a variable frequency refrigerator provided by an embodiment of the invention.
Detailed Description
Embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Fig. 1 illustrates a schematic structural diagram of a voltage control circuit provided by the present invention, the voltage control circuit is suitable for a frequency conversion device, and the frequency conversion device is a device provided with a frequency converter, and is capable of changing a power supply frequency, thereby adjusting a load, and playing roles of reducing power consumption, reducing loss, prolonging a service life of the device, and the like.
When frequency conversion equipment is manufactured and sold, corresponding equipment customization can be carried out according to different selling areas, different frequency conversion equipment is generated, and the working condition voltage of certain load (such as a heater in a refrigerator, an ice crushing motor in the refrigerator and the like) in the frequency conversion equipment is different, so that the type and the performance of the load are different.
Therefore, the voltage control circuit can be configured in the frequency conversion equipment, the working condition voltage can be converted into the standard voltage, the same load can be used on equipment with different working condition voltages, the standardization of products is improved, and the manufacturing efficiency of the products is improved.
Referring to fig. 1, the voltage control circuit includes a voltage output unit 11 and a voltage conversion unit 12, wherein:
a voltage output unit 11 for outputting an alternating voltage as a working condition voltage;
the voltage converting unit 12 is configured to perform ac-dc conversion on the ac voltage to convert the ac voltage into a dc voltage, where the dc voltage is a required voltage of a load (e.g., a first load 13 in fig. 1) operating in a preset scene in the frequency conversion device. For example, the heater needs to be started in a defrosting scene of the inverter refrigerator, or the ice crushing motor needs to be started in an ice crushing scene of the inverter refrigerator.
In the inverter device, the inverter 20 has an ac-dc-ac conversion function, that is, the inverter has an ac-dc conversion channel, and the ac-dc conversion channel firstly performs ac-dc conversion, and then has a dc-ac conversion channel, and then performs dc-ac conversion. Therefore, the frequency conversion device can perform corresponding work on other loads (such as the second load 21 in fig. 1) in the frequency conversion device under corresponding operation scenarios through the conversion from ac to dc to ac.
Here, other loads in the frequency conversion device are different from the loads connected to the voltage conversion unit. For example, a compressor in an inverter refrigerator is controlled by the ac-dc-ac conversion action of an inverter, and a heater in the inverter refrigerator is controlled by the voltage control circuit of the present application.
As can be seen from the above description, the ac-dc-ac conversion function of the inverter in the inverter device can be divided into an ac-dc conversion unit 201 and a dc-ac conversion unit 202. The voltage conversion unit 12 and the ac-dc conversion unit 201 of the present application share at least one rectifier bridge. The rectifier bridge is the voltage converter body, which is initially already provided in the ac-dc converter unit of the frequency converter. The voltage control circuit can directly use the complete circuit structure of the alternating current-direct current conversion unit, the lead-out line of the alternating current-direct current conversion unit is connected with the load, or only use the rectifier bridge in the alternating current-direct current conversion unit, then add other components to build a new circuit structure, and the lead-out line of the new circuit structure is connected with the load. Therefore, the ac-dc conversion unit can be used as the voltage conversion unit of the present application, and a new circuit structure can be used as the voltage conversion unit of the present application, that is, the voltage conversion unit and the ac-dc conversion unit at least share the same rectifier bridge.
The change of the application is equivalent to the improvement of a circuit of a frequency converter in frequency conversion equipment, and standard voltage obtained by conversion is directly connected to a load by using an alternating current-direct current conversion function.
According to the voltage control circuit suitable for the frequency conversion equipment, the alternating current voltage serving as the working condition voltage is output to the required voltage suitable for the load through the alternating current-direct current channel of the frequency converter in the frequency conversion equipment, so that the working condition voltage is converted into the standard voltage, the same type of load can be used on equipment with different working condition voltages, the standardization of products is improved, and the manufacturing efficiency of the products is improved.
In the further explanation of the present invention, the voltage converting unit adopts a corresponding structure for different operating condition voltages (i.e. different voltage ranges), which can realize fast conversion of voltage and enhance the adaptability of the circuit.
For example, for the first voltage range (110V-120V, generally taking 110V of alternating voltage), the specific structure of the voltage conversion unit shown in fig. 2 and 3 can be adopted.
For the second voltage range (220V-230V, generally taking 220V ac voltage), the specific structure of the voltage conversion unit shown in fig. 4 and 5 can be adopted.
Fig. 2 illustrates a schematic structural diagram of a voltage control circuit provided by the present invention, where the voltage control circuit is suitable for a frequency conversion device, and the frequency conversion device is a device provided with a frequency converter. Different frequency conversion equipment aims at different sales areas, and the working condition voltage of a certain load (such as a heater in a refrigerator, an ice crushing motor and the like) is different, so that the type and the performance of the load are different.
Therefore, the voltage control circuit can be configured in the frequency conversion equipment, the working condition voltage can be converted into the standard voltage, the same load can be used on equipment with different working condition voltages, the standardization of products is improved, and the manufacturing efficiency of the products is improved.
Referring to fig. 2, the voltage control circuit includes a voltage output unit 11 and a voltage conversion unit 12, wherein:
a voltage output unit 11 for outputting an alternating voltage as a working condition voltage;
a voltage conversion unit 12, configured to perform ac-dc conversion on an ac voltage to convert the ac voltage into a dc voltage, where the dc voltage is a voltage required by a load (for example, a first load 13 in fig. 1) operating in a preset scene in the frequency conversion device;
the voltage converting unit 12 includes a rectifier bridge 121, a first capacitor 122, a second capacitor 123, and a first jumper 124, wherein:
two input ends (AC) of the rectifier bridge are respectively connected with two output ends (L and N) of the voltage output unit, and two output ends (V + and V-) of the rectifier bridge are connected with the first load.
One end of the first capacitor EC1 is connected with one end of the second capacitor EC2, the other end of the first capacitor EC1 is connected with the positive output end V + of the rectifier bridge, and the other end of the second capacitor EC2 is connected with the negative output end V-of the rectifier bridge.
The other end of the first capacitor EC1 is further connected to an external voltage input terminal 310V, and the other end of the second capacitor EC2 is further connected to ground GND.
One end of the first jumper JP1 is connected to the input AC of the rectifier bridge, and the other end is connected to a connection point of the first capacitor EC1 and the second capacitor EC 2.
In this regard, the voltage output unit outputs an ac voltage as the duty voltage, and the ac voltage is converted into a dc voltage of 310V (i.e., with reference to the external voltage) by the rectifier bridge, the capacitor, and the jumper line, and the dc voltage is used as the operating voltage of the first load.
In addition, the first capacitor EC1 and the second capacitor EC2 may adopt electrolytic capacitors, and at this time, as can be seen from fig. 4, the positive electrode of the first capacitor EC1 is connected to the positive output terminal V + of the rectifier bridge, and the negative electrode of the second capacitor EC2 is connected to the negative output terminal V-of the rectifier bridge.
For further explanation, referring to fig. 3, the voltage control circuit further includes a switch unit 14, which receives a control signal output by the control board of the frequency conversion device to trigger, and completes the opening or closing. When the switch unit is opened, the voltage output unit, the voltage conversion unit and the load cannot form a loop, and the load cannot acquire the converted working voltage; when the switch unit is closed, the voltage output unit, the voltage conversion unit and the load can form a loop, and the load can obtain the converted working voltage.
Therefore, one end of the switch unit is connected to the output end V + of the rectifier bridge, and the other end of the switch unit is connected to one end of the first load. In the present application, the switch unit may be a relay, or may be another switch.
In this regard, it should be noted that the first load needs to be started in a preset working scene, and starts corresponding work. For example, the heater (i.e., the first load) of the inverter refrigerator may be started to operate in a defrosting scenario, or the ice crusher of the inverter refrigerator may be started to operate in an ice crushing scenario.
Therefore, when the control panel in the frequency conversion device detects that the current state data of the frequency conversion device meets the preset working scene, the control panel sends a control signal to the switch unit so that the switch unit is closed, and a loop formed by the voltage output unit, the rectifier bridge, the capacitor, the jumper and the first load is opened, so that the purpose that the voltage control circuit provides direct-current voltage for the first load is achieved.
For example, when the control panel of the variable frequency refrigerator detects that frost in a freezing chamber of the refrigerator exceeds a preset standard, the control panel judges that the refrigerator meets a defrosting condition, and at the moment, the control panel sends a control signal to the switch unit to control the switch unit to be closed. And a loop consisting of the power output unit, the rectifier bridge, the capacitor, the jumper and the heater is switched on, so that the heater is heated to remove frost in the freezing chamber.
Fig. 4 illustrates a schematic structural diagram of a voltage control circuit provided by the present invention, where the voltage control circuit is suitable for a frequency conversion device, and the frequency conversion device is a device provided with a frequency converter. Different frequency conversion equipment aims at different sales areas, and the working condition voltage of a certain load (such as a heater in a refrigerator, an ice crushing motor and the like) is different, so that the type and the performance of the load are different.
Therefore, the voltage control circuit can be configured in the frequency conversion equipment, can convert the working condition voltage into the standard voltage, enables the same load to be used on equipment with different working condition voltages, improves the standardization of products, and improves the manufacturing efficiency of the products.
Referring to fig. 4, the voltage control circuit includes a voltage output unit 11 and a voltage conversion unit 12, in which:
a voltage output unit 11 for outputting an alternating voltage as a working condition voltage;
a voltage conversion unit 12, configured to perform ac-dc conversion on an ac voltage to convert the ac voltage into a dc voltage, where the dc voltage is a voltage required by a load (for example, a first load 13 in fig. 1) operating in a preset scene in the frequency conversion device;
the voltage conversion unit 12 includes a rectifier bridge 121, a second jumper 125, and a second capacitor 123, wherein:
two input ends (AC) of the rectifier bridge are respectively connected with two output ends (L and N) of the voltage output unit, and two output ends (V + and V-) of the rectifier bridge are connected with the first load.
One end of the second jumper JP2 is connected with one end of the second capacitor EC2, the other end of the second jumper JP2 is connected to the positive output end V + of the rectifier bridge, and the other end of the second capacitor EC2 is connected to the negative output end V-of the rectifier bridge.
The other end of the second jumper JP2 is further connected to the external voltage input terminal 310V, and the other end of the second capacitor EC2 is further connected to the ground GND.
In this regard, the voltage output unit outputs an ac voltage as the operating voltage, and the ac voltage is converted into a dc voltage of 310V (i.e., based on the external voltage) by the action of the rectifier bridge, the capacitor, and the jumper line, and the dc voltage is used as the operating voltage of the first load.
In addition, the first capacitor EC1 and the second capacitor EC2 may be electrolytic capacitors, and in this case, as can be seen from fig. 4, the positive electrode of the first capacitor EC1 is connected to the positive output terminal V + of the rectifier bridge, and the negative electrode of the second capacitor EC2 is connected to the negative output terminal V-of the rectifier bridge.
For further explanation, referring to fig. 5, the voltage control circuit further includes a switch unit 14, which receives a control signal output by the control board of the frequency conversion device to trigger, and completes the opening or closing. When the switch unit is opened, the voltage output unit, the voltage conversion unit and the load cannot form a loop, and the load cannot acquire the converted working voltage; when the switch unit is closed, the voltage output unit, the voltage conversion unit and the load can form a loop, and the load can obtain the converted working voltage.
Therefore, one end of the switch unit is connected to the output end V + of the rectifier bridge, and the other end of the switch unit is connected to one end of the first load. In the present application, the switch unit may be a relay, or may be another switch.
In this regard, it should be noted that the first load needs to be started in a preset working scene, and starts corresponding work. For example, the heater (i.e., the first load) of the inverter refrigerator may be started to operate in a defrosting scenario, or the ice crusher of the inverter refrigerator may be started to operate in an ice crushing scenario.
Therefore, when the control panel in the frequency conversion device detects that the current state data of the frequency conversion device meets the preset working scene, the control panel sends a control signal to the switch unit so that the switch unit is closed, and a loop formed by the voltage output unit, the rectifier bridge, the capacitor, the jumper and the first load is opened, so that the purpose that the voltage control circuit provides direct-current voltage for the first load is achieved.
For example, when the control panel of the variable frequency refrigerator detects that frost in a freezing chamber of the refrigerator exceeds a preset standard, the control panel judges that the refrigerator reaches an ice crushing condition, and at the moment, the control panel sends a control signal to the switch unit to control the switch unit to be closed. And a loop formed by the power output unit, the rectifier bridge, the capacitor, the jumper and the ice crushing motor is switched on, so that the ice crushing motor is used for crushing ice and crushing and removing frost in the freezing chamber.
Referring to fig. 7, the present invention further provides an inverter refrigerator, which includes an inverter having an ac-dc-ac conversion function, that is, the inverter has an ac-dc conversion channel and a dc-ac conversion channel, and the inverter can perform work on other loads (such as a compressor) in the inverter device in a corresponding scene through ac-dc-ac conversion.
Thus, the inverter is divided into an ac-dc conversion unit and a dc-ac conversion unit according to the function of ac-dc-ac conversion.
The frequency conversion refrigerator is also provided with a voltage control circuit, and the voltage control circuit is directly connected with a load (a heater) through an AC-DC conversion unit in the frequency converter and a line led out from the AC-DC conversion unit. 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 change of the frequency conversion refrigerator is equivalent to the improvement of the circuit of a frequency converter in the frequency conversion refrigerator, and the standard voltage obtained by conversion is directly connected to a load (a heater) by utilizing the AC-DC conversion function.
Different frequency conversion refrigerators are different in operating voltage of a certain load (such as a heater in the refrigerator, an ice crushing motor and the like) aiming at different sales areas, so that the type and the performance of the load are different. For example, different types of heaters have different resistances.
According to the frequency conversion refrigerator provided by the embodiment of the invention, the voltage control circuit is configured, so that the alternating current voltage serving as the working condition voltage can be output to the required voltage suitable for the load through the alternating current-direct current channel of the frequency converter in the frequency conversion equipment, the working condition voltage can be converted into the standard voltage, the load in the same type can be used on equipment with different working condition voltages, the standardization of products is improved, and the manufacturing efficiency of the products is improved.
The invention also provides a frequency conversion device, which comprises a frequency converter, wherein the frequency converter is provided with an alternating current-direct current-alternating current conversion function, namely the frequency converter is provided with an alternating current-direct current conversion channel and then a direct current-alternating current conversion channel, and the frequency converter can execute work on other loads in the frequency conversion device under corresponding scenes through alternating current-direct current-alternating current conversion.
Thus, the inverter is divided into an ac-dc conversion unit and a dc-ac conversion unit according to the function of ac-dc-ac conversion.
The frequency conversion equipment is also provided with a voltage control circuit, and the voltage control circuit is directly connected with a load through an alternating current-direct current conversion unit in the frequency converter and a line led out from the alternating current-direct current conversion unit. 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.
The change of the frequency conversion equipment is equivalent to the improvement of a circuit of a frequency converter in the frequency conversion equipment, and the standard voltage obtained by conversion is directly connected to a load by utilizing the AC-DC conversion function.
The frequency conversion equipment is provided with the voltage control circuit. Here, the frequency conversion equipment is a product with differentiated power supply working conditions. In these products, there are differences in operating voltages, resulting in different types and performance of the loads.
According to the frequency conversion equipment provided by the embodiment of the invention, the voltage control circuit is configured, so that the alternating-current voltage serving as the working condition voltage can be output to the required voltage suitable for the load through the alternating-current-direct-current channel of the frequency converter in the frequency conversion equipment, the working condition voltage can be converted into the standard voltage, the same load can be used on equipment with different working condition voltages, the standardization of products is improved, and the manufacturing efficiency of the products is improved.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
The above embodiments are only for illustrating the present invention and are not to be construed as limiting the present invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications and equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and the technical solution of the present invention is covered by the claims of the present invention.
Claims (10)
1. A voltage control circuit for a variable frequency device, comprising:
a voltage output unit for outputting an alternating voltage;
the voltage conversion unit is used for converting the alternating-current voltage into direct-current voltage, and the direct-current voltage is used for providing required voltage for a load in the frequency conversion equipment;
the frequency conversion equipment is provided with a frequency converter comprising an alternating current-direct current conversion unit and a direct current-alternating current conversion unit, and the voltage conversion unit and the alternating current-direct current conversion unit at least share the same rectifier bridge.
2. The voltage control circuit for a variable frequency device according to claim 1, wherein the voltage conversion unit comprises a rectifier bridge, a first capacitor, a second capacitor and a first jumper if the ac voltage is in a first voltage range, wherein:
the input end of the rectifier bridge is connected with the voltage output unit, and the output end of the rectifier bridge is connected with the load;
one end of the first capacitor is connected with one end of the second capacitor, the other end of the first capacitor is connected to the positive output end of the rectifier bridge, and the other end of the second capacitor is connected to the negative output end of the rectifier bridge;
the other end of the first capacitor is connected to an external voltage input end, and the other end of the second capacitor is grounded;
one end of the first jumper is connected into the input end of the rectifier bridge, and the other end of the first jumper is connected into the joint of the first capacitor and the second capacitor.
3. The voltage control circuit for a variable frequency device according to claim 1, wherein the voltage converting unit comprises a rectifier bridge, a second jumper and a second capacitor if the ac voltage is in a second voltage range, wherein:
the input end of the rectifier bridge is connected with the voltage output unit, and the output end of the rectifier bridge is connected with the load;
one end of the second jumper is connected with one end of the second capacitor, the other end of the second jumper is connected with the positive output end of the rectifier bridge, and the other end of the second capacitor is connected with the negative output end of the rectifier bridge;
the other end of the second jumper is connected to an external voltage input end, and the other end of the second capacitor is grounded.
4. The voltage control circuit for the frequency conversion device according to claim 2 or 3, further comprising a switch unit, wherein the switch unit is turned off by a control signal output by a control board of the frequency conversion device; one end of the switch unit is connected to the output end of the rectifier bridge, and the other end of the switch unit is connected to the load.
5. The voltage control circuit suitable for frequency conversion equipment according to claim 2, wherein the first capacitor and the second capacitor are electrolytic capacitors, the positive electrode of the first capacitor is connected with the positive output end of the rectifier bridge, and the negative electrode of the second capacitor is connected with the negative output end of the rectifier bridge.
6. The voltage control circuit for variable frequency devices of claim 2, wherein the first voltage range is 110V-120V.
7. The voltage control circuit for variable frequency devices of claim 3, wherein the second voltage range is 220V-230V.
8. A voltage control circuit for frequency conversion devices according to claim 2 or 3, characterized in that the voltage value of the external voltage input is 310V.
9. Frequency converter arrangement, characterized in that it comprises a voltage control circuit according to any of the claims 1-7.
10. The inverter apparatus according to claim 1, wherein if the inverter apparatus is an inverter refrigerator, the load is a heater or an ice crushing motor.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110773708.0A CN115603596A (en) | 2021-07-08 | 2021-07-08 | Voltage control circuit suitable for frequency conversion equipment and frequency conversion equipment |
| PCT/CN2022/103656 WO2023280108A1 (en) | 2021-07-08 | 2022-07-04 | Voltage control circuit applicable to frequency inversion device, and frequency inversion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110773708.0A CN115603596A (en) | 2021-07-08 | 2021-07-08 | Voltage control circuit suitable for frequency conversion equipment and frequency conversion equipment |
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| CN115603596A true CN115603596A (en) | 2023-01-13 |
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| CN202110773708.0A Pending CN115603596A (en) | 2021-07-08 | 2021-07-08 | Voltage control circuit suitable for frequency conversion equipment and frequency conversion equipment |
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| WO (1) | WO2023280108A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4340518B2 (en) * | 2003-10-31 | 2009-10-07 | 日立アプライアンス株式会社 | Load drive device |
| CN101577484B (en) * | 2008-05-08 | 2011-11-16 | 海尔集团公司 | Power supply device of switch power supply of external convertible frequency air conditioner |
| CN104344499B (en) * | 2013-08-08 | 2018-04-24 | 珠海格力电器股份有限公司 | A kind of convertible frequency air-conditioner |
| CN206226303U (en) * | 2016-11-28 | 2017-06-06 | 广东美的制冷设备有限公司 | Voltage conversion controls circuit and household electrical appliance |
| CN112310966A (en) * | 2020-10-15 | 2021-02-02 | 珠海格力电器股份有限公司 | Photovoltaic energy storage air conditioner power supply system and control method thereof |
| CN215268089U (en) * | 2021-07-08 | 2021-12-21 | 合肥华凌股份有限公司 | Voltage control circuit suitable for frequency conversion equipment and frequency conversion equipment |
-
2021
- 2021-07-08 CN CN202110773708.0A patent/CN115603596A/en active Pending
-
2022
- 2022-07-04 WO PCT/CN2022/103656 patent/WO2023280108A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023280108A1 (en) | 2023-01-12 |
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