CN219124104U - Safe and controllable power supply circuit and range hood - Google Patents
Safe and controllable power supply circuit and range hood Download PDFInfo
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- CN219124104U CN219124104U CN202223243132.6U CN202223243132U CN219124104U CN 219124104 U CN219124104 U CN 219124104U CN 202223243132 U CN202223243132 U CN 202223243132U CN 219124104 U CN219124104 U CN 219124104U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The utility model discloses a safe and controllable power supply circuit and a range hood, wherein the safe and controllable power supply circuit comprises: isolating the power supply module; the isolation power supply module is connected with a power supply end of the control module; the input end of the switch module is connected with the power supply end, and the control module is connected with the controlled end of the switch module; the output end of the switch module is connected with the input end of the non-isolated power supply module; and the output end of the non-isolated power supply module can be connected with the load module. The isolation power supply module supplies power to the control module, so that the electric shock risk can be reduced, meanwhile, the control module controls the working state of the non-isolation power supply module through the switch module, can drive the load to work efficiently when needed, stops supplying power to the non-isolation power supply module when no load work or control module faults are needed, and is beneficial to reducing the electric shock probability and improving the safety.
Description
Technical Field
The utility model relates to the field of power supply circuits of range hoods, in particular to a safe and controllable power supply circuit and a range hood.
Background
In the household kitchen electric industry, the power supply on the electric control board is generally divided into a non-isolated power supply and an isolated power supply, and the isolated power supply is generally provided with a transformer between an input end and an output end, so that the input end and the output end are indirectly connected, and therefore, a load connected with the output end by touching does not have the danger of electric shock; the non-isolated power supply is characterized in that the input end and the output end are not isolated through a transformer, the input end and the output end are grounded together, so that a load connected with the output end by touch is easy to get an electric shock, the isolated power supply has higher safety, and the non-isolated power supply has high efficiency. In the prior art, a non-isolated power supply is generally used singly in a power circuit of household kitchen electricity, and the safety is insufficient although the working efficiency is high.
Disclosure of Invention
The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides a safe and controllable power supply circuit which has high working efficiency and improves safety.
The utility model also provides a range hood which can have the high working efficiency of the non-isolated power supply and the safety of the isolated power supply.
A safety controllable power supply circuit according to an embodiment of the first aspect of the present utility model includes: isolating the power supply module; the isolation power supply module is connected with a power supply end of the control module; the input end of the switch module is connected with the power supply end, and the control module is connected with the controlled end of the switch module; the output end of the switch module is connected with the input end of the non-isolated power supply module; and the output end of the non-isolated power supply module can be connected with the load module.
The safe controllable power supply circuit provided by the embodiment of the utility model has at least the following beneficial effects: the isolation power supply module supplies power to the control module, and the control module obtains electric energy from the isolation power supply module to work normally. When the load is required to work, the control module is conducted through the control switch module, so that the non-isolated power supply module can acquire electric energy from the power supply end, and the non-isolated power supply module can drive the load module to work; when the load module is not required to work or the control module fails and can not drive the switch module to be turned on, the switch module is turned off, so that the non-isolated power supply module can be powered off to stop working. Therefore, the isolation power supply module supplies power to the control module, the electric shock risk can be reduced, meanwhile, the control module controls the working state of the non-isolation power supply module through the switch module, can drive the load to work efficiently when needed, stops supplying power to the non-isolation power supply module when no load work or control module faults are needed, and is beneficial to reducing the electric shock probability and improving the safety.
According to some embodiments of the utility model, the switching module comprises a switching tube, one end of the switching tube is connected with a power supply end, the other end of the switching tube is connected with an input end of the non-isolated power supply module, and the control module is connected with a controlled end of the switching tube.
According to some embodiments of the utility model, the switch module further comprises a photoelectric coupler, the control module is connected with a light emitting part of the photoelectric coupler, and a light receiving part of the photoelectric coupler is connected with a controlled end of the switch tube.
According to some embodiments of the utility model, the non-isolated power supply module comprises at least one linear voltage regulator, an input terminal of the linear voltage regulator is connected with an output terminal of the switch module, and an output terminal of the linear voltage regulator is connected with the load module.
According to some embodiments of the utility model, the non-isolated power supply module comprises a first linear voltage stabilizer and a second linear voltage stabilizer, wherein an input end of the first linear voltage stabilizer is connected with an output end of the switch module, an output end of the first linear voltage stabilizer is respectively connected with the load module and an input end of the second linear voltage stabilizer, an output end of the second linear voltage stabilizer is connected with the load module, and an output end voltage of the first linear voltage stabilizer is larger than an output end voltage of the second linear voltage stabilizer.
According to some embodiments of the utility model, the power supply system further comprises a rectifying and voltage stabilizing module, wherein an input end of the rectifying and voltage stabilizing module can be connected with external mains supply, and an output end of the rectifying and voltage stabilizing module is respectively connected with the input ends of the isolating power supply module and the switch module.
According to some embodiments of the utility model, the rectifying and voltage stabilizing module comprises a rectifying bridge and a voltage stabilizing circuit, wherein an input end of the rectifying bridge can be connected with external commercial power, an output end of the rectifying bridge is connected with an input end of the voltage stabilizing circuit, and an output end of the voltage stabilizing circuit is respectively connected with the input ends of the isolation power supply module and the switch module.
According to some embodiments of the utility model, the rectifying and voltage stabilizing module further comprises a choke, an input of which is connectable to an external mains, and an output of which is connected to an input of the rectifying bridge.
According to some embodiments of the utility model, the isolation power supply module comprises a transformer, a primary side feedback controller and a filter circuit, one end of a primary side coil of the transformer is connected with the voltage stabilizing circuit, the other end of the primary side coil is connected with the primary side feedback controller, a secondary side coil of the transformer is connected with the control module through the filter circuit, and a feedback end of the primary side feedback controller is connected with the filter circuit.
According to the second aspect of the utility model, the range hood comprises a machine body and an electric control board arranged on the machine body, wherein the electric control board comprises the safe controllable power circuit.
The range hood provided by the embodiment of the utility model has at least the following beneficial effects: on an electric control board in the machine body, the isolation power supply module acquires electric energy to supply power for the control module in an isolation power supply mode, and the control module acquires the electric energy from the isolation power supply module to work normally. When the load is required to work, the control module is conducted through the control switch module, so that the non-isolated power supply module can acquire electric energy from the power supply end, and the non-isolated power supply module can drive the load module to work; when the load module is not required to work or the control module fails and can not drive the switch module to be turned on, the switch module is turned off, so that the non-isolated power supply module can be powered off to stop working. Therefore, the isolation power supply module supplies power to the control module, the electric shock risk can be reduced, meanwhile, the control module controls the working state of the non-isolation power supply module through the switch module, can drive the load to work efficiently when needed, stops supplying power to the non-isolation power supply module when no load work or control module faults are needed, and is beneficial to reducing the electric shock probability and improving the safety.
Additional aspects and advantages of the utility model 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 utility model.
Drawings
The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a circuit diagram of a control module, a switch module, and a non-isolated power module according to one embodiment of the present utility model;
FIG. 2 is a circuit diagram of a rectifying and voltage stabilizing module according to one embodiment of the present utility model;
FIG. 3 is a circuit diagram of a isolated power module according to one embodiment of the utility model;
fig. 4 is a circuit diagram of a load module according to one embodiment of the utility model.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.
In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, the description of the first and second is only for the purpose of distinguishing technical features, and should not be construed as indicating or implying relative importance or implying the number of technical features indicated or the precedence of the technical features indicated.
In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
As shown in fig. 1 to 4, a safety controllable power supply circuit according to an embodiment of the present utility model includes: isolating the power supply module 100; the control module 200 is connected with the power supply end of the control module 200 by isolating the power supply module 100; the input end of the switch module 300 is connected with the power supply end, and the control module 200 is connected with the controlled end of the switch module 300; the non-isolated power supply module 400, the output end of the switch module 300 is connected with the input end of the non-isolated power supply module 400; the output of the load module 500, the non-isolated power module 400 can be connected to the load module 500.
The isolated power supply module 100 supplies power to the control module 200, and the control module 200 obtains electric energy from the isolated power supply module 100 to work normally. When the load is required to work, the control module 200 is conducted through the control switch module 300, so that the non-isolated power supply module 400 can acquire electric energy from a power supply end, and the non-isolated power supply module 400 can drive the load module 500 to work; when the load module 500 is not needed to work or the control module 200 fails and the switch module 300 cannot be driven to be turned on, the switch module 300 is turned off, so that the non-isolated power supply module 400 can be powered down to stop working. In this way, the isolated power supply module 100 supplies power to the control module 200, so as to reduce the risk of electric shock, and meanwhile, the control module 200 controls the working state of the non-isolated power supply module 400 through the switch module 300, so that the load can be driven to work efficiently when needed, and the power supply to the non-isolated power supply module 400 is stopped when no load work or the control module 200 fails, thereby being beneficial to reducing the probability of electric shock and improving the safety.
The control module 200 may be an embodiment including a microprocessor, embedded chip, FPGA, or the like.
Referring to fig. 1, in some embodiments of the present utility model, the switching module 300 includes a switching tube 310, one end of the switching tube 310 is connected to a power supply terminal, the other end of the switching tube 310 is connected to an input terminal of the non-isolated power supply module 400, and the control module 200 is connected to a controlled terminal of the switching tube 310.
The control module 200 controls the working state of the non-isolated power supply module 400 by driving the switching tube 310 to be turned on and off, and has a simple structure and convenient implementation.
The switch 310 may be an embodiment of a transistor, a MOS transistor, or the like.
Referring to fig. 1, in some embodiments of the present utility model, the switching module 300 further includes a photo coupler 320, the control module 200 is connected to a light emitting element of the photo coupler 320, and a light receiving element of the photo coupler 320 is connected to a controlled end of the switching tube 310.
The control module 200 is connected with the light emitting part of the photoelectric coupler 320, so that the light emitting state of the light emitting part of the photoelectric coupler 320 can be controlled, the light receiving part of the photoelectric coupler 320 changes the voltage of the controlled end of the control switch tube 310 according to whether illumination is received, the control module 200 controls the switch tube 310 to be switched on or off through the photoelectric coupler 320, the control module 200 can be electrically isolated from the switch tube 310 through the photoelectric coupler 320, the mutual influence between the isolation power supply module 100 and the non-isolation power supply module 400 is avoided, and the reliability of a circuit is improved.
Referring to fig. 1, in some embodiments of the present utility model, the non-isolated power supply module 400 includes at least one linear regulator having an input connected to an output of the switching module 300 and an output connected to the load module 500.
The linear voltage stabilizer is adopted to realize the effect of non-isolated stable power supply, has the advantages of simple structure of peripheral circuits and convenient use, is beneficial to simplifying circuit design, and has lower cost.
Referring to fig. 1, in some embodiments of the present utility model, the non-isolated power supply module 400 includes a first linear voltage regulator 410 and a second linear voltage regulator 420, wherein an input terminal of the first linear voltage regulator 410 is connected to an output terminal of the switch module 300, an output terminal of the first linear voltage regulator 410 is connected to the load module 500 and an input terminal of the second linear voltage regulator 420, respectively, an output terminal of the second linear voltage regulator 420 is connected to the load module 500, and an output terminal voltage of the first linear voltage regulator 410 is greater than an output terminal voltage of the second linear voltage regulator 420.
Since the operating voltages of the different devices in the load module 500 may be different, the first linear voltage regulator 410 is provided to form a first supply voltage to supply power to the load module 500, and meanwhile, the output voltage of the first linear voltage regulator 410 is greater than the output voltage of the second linear voltage regulator 420, and the output voltage of the first linear voltage regulator 410 can be used as the input voltage of the second linear voltage regulator 420, so that the second linear voltage regulator 420 can work normally to output the second supply voltage to supply power to the load module 500. In this way, the effect of providing different power supply voltages can be achieved, and the power supply requirement of the load module 500 is met.
Referring to fig. 2, in some embodiments of the present utility model, the power supply system further includes a rectifying and voltage stabilizing module 600, wherein an input end of the rectifying and voltage stabilizing module 600 can be connected to an external mains supply, and an output end of the rectifying and voltage stabilizing module 600 is connected to input ends of the isolated power supply module 100 and the switch module 300, respectively.
The rectification voltage stabilizing module 600 rectifies and stabilizes the mains supply to form a stable voltage, which is input to the isolation power supply module 100 and the switch module 300, so that the isolation power supply module 100 can work stably and normally, and when the control module 200 controls the switch module 300 to be conducted, the non-isolation power supply module 400 can also obtain the stable voltage from the rectification voltage stabilizing module 600 to work normally.
Referring to fig. 2, in some embodiments of the present utility model, the rectifying and voltage stabilizing module 600 includes a rectifying bridge 610 and a voltage stabilizing circuit 620, wherein an input end of the rectifying bridge 610 can be connected to an external mains supply, an output end of the rectifying bridge 610 is connected to an input end of the voltage stabilizing circuit 620, and output ends of the voltage stabilizing circuit 620 are respectively connected to input ends of the isolated power supply module 100 and the switch module 300.
The rectifier bridge 610 rectifies and converts the mains supply into direct current, and the voltage stabilizing circuit 620 filters the rectified direct current to form stable direct current to supply power to the isolated power supply module 100 and can supply power to the non-isolated power supply module 400 through the switch module 300, so that the structure is simple and the implementation is convenient.
The voltage stabilizing circuit 620 may be an implementation with a filtering voltage stabilizing function, such as a common RC circuit, LC circuit, etc.
Referring to fig. 2, in some embodiments of the present utility model, the rectifying and voltage stabilizing module 600 further includes a choke 630, an input terminal of the choke 630 is capable of being connected to an external utility power, and an output terminal of the choke 630 is connected to an input terminal of the rectifying bridge 610.
Before the mains supply is input into the rectifier bridge 610, the mains supply passes through the choke 630, so that the high-frequency interference part in the mains supply can be restrained, the impact of the interference high-frequency interference part on the rectifier bridge 610 is reduced, and the rectifier bridge 610 works more stably and reliably.
Referring to fig. 3, in some embodiments of the present utility model, the isolated power supply module 100 includes a transformer 110, a primary feedback controller 120, and a filter circuit 130, one end of a primary winding of the transformer 110 is connected to a voltage stabilizing circuit 620, the other end of the primary winding is connected to the primary feedback controller 120, a secondary winding of the transformer 110 is connected to the control module 200 through the filter circuit 130, and a feedback end of the primary feedback controller 120 is connected to the filter circuit 130.
Since the transformer 110 normally works to achieve the isolation effect, the primary side is required to input alternating current, and the voltage stabilizing circuit 620 outputs direct current, the primary side coil of the transformer 110 is respectively connected with the voltage stabilizing circuit 620 and the primary side feedback controller 120 by being provided with the primary side feedback controller 120, the primary side feedback controller 120 can change the current flowing through the primary side coil of the transformer 110 by controlling the voltage of one end of the primary side coil of the transformer 110, the transformer isolation effect of the transformer 110 is achieved, the secondary side coil of the transformer 110 generates voltage and current, and the voltage and the current generated by the secondary side coil form stable direct current after passing through the filter circuit 130 to supply power to the control module 200. Meanwhile, the feedback end of the primary side feedback controller 120 is connected with the filter circuit 130 to obtain the fed back voltage or current, so as to control the primary side coil alternating current of the transformer 110, so that the voltage and current generated by the secondary side coil are more stable.
The primary side feedback controller 120 may be an embodiment of a device such as a switching power supply chip. The filter circuit 130 may be an embodiment including a common RC circuit, LC circuit, or the like having a filter function.
According to a second aspect of the utility model, a range hood comprises a body and an electric control board arranged on the body, wherein the electric control board comprises the safe controllable power circuit.
On an electric control board in the machine body, the isolated power supply module 100 obtains electric energy to supply power for the control module 200 in an isolated power supply mode, and the control module 200 obtains the electric energy from the isolated power supply module 100 to work normally. When the load is required to work, the control module 200 is conducted through the control switch module 300, so that the non-isolated power supply module 400 can acquire electric energy from a power supply end, and the non-isolated power supply module 400 can drive the load module 500 to work; when the load module 500 is not needed to work or the control module 200 fails and the switch module 300 cannot be driven to be turned on, the switch module 300 is turned off, so that the non-isolated power supply module 400 can be powered down to stop working. In this way, the isolated power supply module 100 supplies power to the control module 200, so as to reduce the risk of electric shock, and meanwhile, the control module 200 controls the working state of the non-isolated power supply module 400 through the switch module 300, so that the load can be driven to work efficiently when needed, and the power supply to the non-isolated power supply module 400 is stopped when no load work or the control module 200 fails, thereby being beneficial to reducing the probability of electric shock and improving the safety.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The present utility model is, of course, not limited to the above-described embodiments, and one skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the utility model, which are intended to be included in the scope of the present utility model as defined in the appended claims.
Claims (10)
1. A safety controllable power supply circuit, comprising:
an isolated power supply module (100);
the control module (200) is connected with the power supply end of the control module (200) by the isolation power supply module (100);
the control device comprises a switch module (300), wherein the input end of the switch module (300) is connected with a power supply end, and the control module (200) is connected with a controlled end of the switch module (300);
the non-isolated power supply module (400), the output end of the switch module (300) is connected with the input end of the non-isolated power supply module (400);
-a load module (500), the output of the non-isolated power module (400) being connectable to the load module (500).
2. A safety controllable power supply circuit according to claim 1, characterized in that: the switch module (300) comprises a switch tube (310), one end of the switch tube (310) is connected with a power supply end, the other end of the switch tube (310) is connected with the input end of the non-isolated power supply module (400), and the control module (200) is connected with the controlled end of the switch tube (310).
3. A safety controllable power supply circuit according to claim 2, characterized in that: the switch module (300) further comprises a photoelectric coupler (320), the control module (200) is connected with a light emitting part of the photoelectric coupler (320), and a light receiving part of the photoelectric coupler (320) is connected with a controlled end of the switch tube (310).
4. A safety controllable power supply circuit according to claim 1, characterized in that: the non-isolated power supply module (400) comprises at least one linear voltage stabilizer, wherein the input end of the linear voltage stabilizer is connected with the output end of the switch module (300), and the output end of the linear voltage stabilizer is connected with the load module (500).
5. A safety controllable power supply circuit according to claim 1, characterized in that: the non-isolated power supply module (400) comprises a first linear voltage stabilizer (410) and a second linear voltage stabilizer (420), wherein the input end of the first linear voltage stabilizer (410) is connected with the output end of the switch module (300), the output end of the first linear voltage stabilizer (410) is respectively connected with the load module (500) and the input end of the second linear voltage stabilizer (420), the output end of the second linear voltage stabilizer (420) is connected with the load module (500), and the output end voltage of the first linear voltage stabilizer (410) is larger than the output end voltage of the second linear voltage stabilizer (420).
6. A safety controllable power supply circuit according to claim 1, characterized in that: the power supply system further comprises a rectification voltage stabilizing module (600), wherein the input end of the rectification voltage stabilizing module (600) can be connected with external mains supply, and the output end of the rectification voltage stabilizing module (600) is respectively connected with the input ends of the isolation power supply module (100) and the switch module (300).
7. A safety controllable power supply circuit according to claim 6, wherein: the rectification voltage stabilizing module (600) comprises a rectification bridge (610) and a voltage stabilizing circuit (620), wherein the input end of the rectification bridge (610) can be connected with external mains supply, the output end of the rectification bridge (610) is connected with the input end of the voltage stabilizing circuit (620), and the output end of the voltage stabilizing circuit (620) is respectively connected with the input ends of the isolation power supply module (100) and the switch module (300).
8. A safety controllable power supply circuit according to claim 7, wherein: the rectifying and voltage stabilizing module (600) further comprises a choke coil (630), wherein the input end of the choke coil (630) can be connected with external mains supply, and the output end of the choke coil (630) is connected with the input end of the rectifying bridge (610).
9. A safety controllable power supply circuit according to claim 7, wherein: the isolation power supply module (100) comprises a transformer (110), a primary side feedback controller (120) and a filter circuit (130), one end of a primary side coil of the transformer (110) is connected with the voltage stabilizing circuit (620), the other end of the primary side coil is connected with the primary side feedback controller (120), a secondary side coil of the transformer (110) is connected with the control module (200) through the filter circuit (130), and a feedback end of the primary side feedback controller (120) is connected with the filter circuit (130).
10. The range hood is characterized in that: comprising a body and an electric control board arranged on the body, the electric control board comprising a safety controllable power circuit according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223243132.6U CN219124104U (en) | 2022-12-02 | 2022-12-02 | Safe and controllable power supply circuit and range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223243132.6U CN219124104U (en) | 2022-12-02 | 2022-12-02 | Safe and controllable power supply circuit and range hood |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219124104U true CN219124104U (en) | 2023-06-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223243132.6U Active CN219124104U (en) | 2022-12-02 | 2022-12-02 | Safe and controllable power supply circuit and range hood |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219124104U (en) |
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2022
- 2022-12-02 CN CN202223243132.6U patent/CN219124104U/en active Active
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