CN215268089U - 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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- CN215268089U CN215268089U CN202121549067.2U CN202121549067U CN215268089U CN 215268089 U CN215268089 U CN 215268089U CN 202121549067 U CN202121549067 U CN 202121549067U CN 215268089 U CN215268089 U CN 215268089U
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Abstract
The utility model relates to an equipment control technical field provides a be suitable for frequency conversion equipment's voltage control circuit and frequency conversion equipment, and this circuit includes: 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 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 utility model provides a be suitable for frequency conversion equipment's voltage control circuit and frequency conversion equipment, through the AC-DC passageway of converter in frequency conversion equipment as operating mode voltage's alternating voltage, the output is suitable for the required voltage of load, realizes converting operating mode voltage into standard voltage, makes the load of the same money can use on the equipment of different operating mode voltages, promotes the standardization of product, promotes product manufacturing efficiency.
Description
Technical Field
The utility model relates to an equipment control technical field especially relates to be suitable for frequency conversion equipment's voltage control circuit and 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 process of controlling the work of the load, the control panel of the frequency conversion equipment triggers 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.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a be suitable for inverter device's voltage control circuit can realize converting operating mode voltage into standard voltage, makes the load of the same money can use on the equipment of different operating mode voltages, promotes the standardization of product, promotes product manufacturing efficiency.
According to the utility model discloses be suitable for frequency conversion equipment's voltage control circuit of first aspect embodiment, include:
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 utility model discloses be suitable for frequency conversion equipment's voltage control circuit, through the AC-DC passageway of converter in frequency conversion equipment as operating mode voltage's alternating voltage, the output is suitable for the required voltage of load, realizes converting operating mode voltage into standard voltage, makes the load of the same money can use on different operating mode voltage's equipment, promotes the standardization of product, promotes product manufacturing efficiency.
According to the utility model discloses an embodiment, if alternating voltage is in first voltage range, then the voltage conversion unit includes rectifier bridge, first electric capacity, second electric capacity and first wire 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 the utility model discloses an embodiment, if alternating voltage is in second voltage range, then voltage conversion unit includes rectifier bridge, second wire jumper and second electric capacity, 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 switch unit, the switch unit is turned off by a control signal output by the 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 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 negative output terminal of the rectifier bridge.
According to an embodiment of the present invention, the first voltage range is 110V-120V.
According to an embodiment of the invention, the second voltage range is 220V-230V.
According to an embodiment of the present invention, the voltage value of the external voltage input terminal is configured to be 310V.
According to the utility model discloses frequency conversion equipment of second aspect embodiment, including foretell voltage control circuit.
According to the utility model discloses an embodiment, if frequency conversion equipment is the frequency conversion refrigerator, then the load is heater or garrulous ice motor.
The embodiment of the utility model provides an in above-mentioned one or more technical scheme, one of following technological effect has at least:
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 these 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 an embodiment of the present invention;
fig. 5 is a schematic diagram of another specific structure of a voltage control circuit according to an embodiment of the present invention;
fig. 6 is a schematic diagram of another specific structure of a voltage control circuit according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a frequency conversion refrigerator provided by the embodiment of the present invention.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying 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 the utility model provides a pair of voltage control circuit's structural schematic, this voltage control circuit is applicable to frequency conversion equipment, and frequency conversion equipment can change the frequency of supplying power for the equipment that possesses the converter to adjust the load, play the reduction consumption, reduce the loss, extension equipment life etc. effect.
When the 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 type and the performance of certain load (such as a heater in a refrigerator, an ice crushing motor in the refrigerator and the like) are different due to different working condition voltages in the frequency conversion equipment.
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, in which:
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 inverter refrigerator needs to start the heater in a defrosting scene, or the inverter refrigerator needs to start the ice crushing motor in an ice crushing scene.
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 equipment can perform corresponding work on other loads (such as the second load 21 in fig. 1) in the frequency conversion equipment under corresponding operation scenes through the conversion of alternating current to direct current to alternating current.
Here, the 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 operation 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 main voltage converter, which is initially 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 may be used as the voltage conversion unit of the present application, and a new circuit structure may also 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 utilizing an alternating current-direct current conversion function.
The utility model provides a be suitable for frequency conversion equipment's voltage control circuit, through the AC-DC passageway of converter in frequency conversion equipment as operating mode voltage's alternating voltage, the output is suitable for the required voltage of load, realizes converting operating mode voltage into standard voltage, makes the load of the same money can use on the equipment of different operating mode voltages, promotes the standardization of product, promotes product manufacturing efficiency.
The utility model discloses an in the further explanation, to different operating mode voltages (different voltage range promptly), voltage conversion unit adopts corresponding structure, can realize the quick switching to voltage, reinforcing circuit's adaptability.
For example, for the first voltage range (110V-120V, generally taking 110V of ac voltage), the specific structure of the voltage conversion unit shown in fig. 2 and 3 may 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 the structure 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 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, 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 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 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 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 AC of the rectifier bridge, and the other end is connected to the 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 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. 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 scenario, 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 the frost in the freezing chamber of the refrigerator exceeds a preset standard, the control panel judges that the refrigerator reaches 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 supply output unit, the rectifier bridge, the capacitor, the jumper and the heater is switched on, so that the heater is heated to remove the frost in the freezing chamber.
Fig. 4 illustrates the structure 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 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. 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, and 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 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 scenario, 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 the frost in the 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 a frequency conversion refrigerator, which includes a frequency converter, the frequency converter has an ac-dc-ac conversion function, that is, the frequency converter has an ac-dc conversion channel and then has a dc-ac conversion channel, and other loads (such as a compressor) in the frequency conversion device can be operated in corresponding scenes 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 utility model discloses a frequency conversion refrigerator is still furnished with voltage control circuit, and this voltage control circuit is connected with load (heater) by this interchange-direct current conversion unit extraction line with the help of the interchange in the converter-direct current conversion unit directly. 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, aiming at different sales regions, have different working condition voltages for a certain load (such as a heater in the refrigerator, an ice crushing motor and the like), so that the type and the performance of the load are different. For example, different models of heaters may have different resistances.
The utility model discloses frequency conversion refrigerator, through disposing foretell voltage control circuit, can realize will regard as operating mode voltage's alternating voltage to pass through the interchange-direct current passageway of converter in the frequency conversion equipment, the output is suitable for the required voltage of load, realizes converting operating mode voltage into standard voltage, makes the load of the same money can use on the equipment of different operating mode voltages, promotes the standardization of product, promotes product manufacturing efficiency.
The utility model also provides a frequency conversion equipment, this frequency conversion equipment include the converter, and this converter possesses interchange-direct current-the conversion function who exchanges, that is to say, converter possesses interchange-direct current conversion passageway again, possesses direct current-interchange conversion passageway again after that, through the conversion of exchanging-direct current-exchanging, can carry out work under the corresponding scene to other loads in the frequency conversion equipment.
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 utility model discloses a frequency conversion equipment still disposes voltage control circuit, and this voltage control circuit is directly connected with the load with the help of the interchange-direct current conversion unit in the converter, by this interchange-direct current conversion unit extraction line. 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.
The utility model discloses frequency conversion equipment through disposing foretell voltage control circuit, can realize will regard as operating mode voltage's alternating voltage to pass through the alternating current-direct current passageway of frequency conversion equipment intermediate frequency converter, and the output is suitable for the required voltage of load, realizes converting operating mode voltage into standard voltage, makes the load of the same money can use on the equipment of different operating mode voltages, promotes the standardization of product, promotes product manufacturing efficiency.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and 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 skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
The above embodiments are merely illustrative, and not restrictive, of 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 or equivalent substitutions 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 all of the technical solutions should be covered by the scope of 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 a variable frequency device according to claim 2 or 3, characterized in that the voltage value of the external voltage input is 310V.
9. Frequency conversion device, characterized in that it comprises a voltage control circuit according to any of the preceding claims 1-7.
10. The inverter apparatus according to claim 9, wherein if the inverter apparatus is an inverter refrigerator, the load is a heater or an ice crushing motor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121549067.2U CN215268089U (en) | 2021-07-08 | 2021-07-08 | Voltage control circuit suitable for frequency conversion equipment and frequency conversion equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121549067.2U CN215268089U (en) | 2021-07-08 | 2021-07-08 | Voltage control circuit suitable for frequency conversion equipment and frequency conversion equipment |
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| CN215268089U true CN215268089U (en) | 2021-12-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023280108A1 (en) * | 2021-07-08 | 2023-01-12 | 合肥华凌股份有限公司 | Voltage control circuit applicable to frequency inversion device, and frequency inversion device |
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2021
- 2021-07-08 CN CN202121549067.2U patent/CN215268089U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023280108A1 (en) * | 2021-07-08 | 2023-01-12 | 合肥华凌股份有限公司 | Voltage control circuit applicable to frequency inversion device, and frequency inversion device |
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