CN208299685U - Power supply circuit, control board and electrical equipment - Google Patents
Power supply circuit, control board and electrical equipment Download PDFInfo
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- CN208299685U CN208299685U CN201820091514.6U CN201820091514U CN208299685U CN 208299685 U CN208299685 U CN 208299685U CN 201820091514 U CN201820091514 U CN 201820091514U CN 208299685 U CN208299685 U CN 208299685U
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- energy storage
- circuit
- power supply
- capacitor
- storage circuit
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Abstract
The present disclosure provides a power supply circuit, a control panel and a power consumption device. The power supply circuit comprises a switching power supply circuit, a first energy storage circuit, a second energy storage circuit and a one-way conduction device. The switch power supply circuit charges the second energy storage circuit after being electrified, and outputs a pulse width modulation signal after the energy storage voltage of the second energy storage circuit exceeds a first threshold voltage so as to charge the first energy storage circuit, the first energy storage circuit supplies power to a circuit load, the one-way conduction device is electrically connected with the first energy storage circuit and the second energy storage circuit respectively, and the conduction direction of the one-way conduction device is from the first energy storage circuit to the second energy storage circuit. The circuit for supplying power to the VCC pin of the switching power supply chip is isolated from the circuit for supplying power to the load, so that the normal work of the switching power supply chip is ensured.
Description
Technical field
This disclosure relates to for electrical domain, in particular to a kind of power supply circuit, control panel and electrical equipment.
Background technique
The course of work of existing inverse-excitation type switch power-supply is: busbar voltage is by switching power source chip high pressure pin to switch
The charging of power supply chip VCC pin, the external capacitor of VCC pin.After capacitance voltage is more than predetermined threshold, switching power source chip
Meeting output pwm signal, the voltage of switching power source chip VCC pin will rapidly fall at this time, this is because being drawn by high pressure
The electric current that foot charges to switching power source chip VCC pin is not enough to provide so more energy.Therefore, when switching power source chip is defeated
Out when pwm signal, the auxiliary winding of high frequency transformer needs to power to switching power source chip VCC pin immediately, to guarantee that VCC draws
Foot voltage does not fall, to guarantee that Switching Power Supply works normally.
But in order to avoid switching power source chip overheat, by switching power source chip high pressure pin to the electric current of capacitor charging
Very faint, this faint energy is not enough to powering load, and the voltage that will lead on capacitor so just can fill at all,
Voltage on capacitor is unable to reach the threshold voltage of switching power source chip starting, so also there will be no PWM for switching power source chip
Signal output, and then cause to there will not be voltage in auxiliary winding.So circulation, causes Switching Power Supply just can not normally open at all
It is dynamic.
Utility model content
The technical problem that embodiment of the disclosure solves is: since charging current is faint, causing Switching Power Supply can not
Starting.
According to the one aspect of one or more other embodiments of the present disclosure, a kind of power supply circuit, including Switching Power Supply are provided
Circuit, the first accumulator, the second accumulator and device in one-way on state, in which:
Switching power circuit is configured as charging to the second accumulator after the power-up, in the energy storage of the second accumulator
Voltage is more than output pulse width modulated signal after the first threshold voltage, so as to the charging of the first accumulator；
First accumulator is configured as powering to circuit load；
Device in one-way on state is configured to be electrically connected with the first accumulator and the second accumulator, wherein unidirectionally
The conducting direction of conducting device is from the first accumulator to the second accumulator.
Optionally, the first accumulator is additionally configured to after tank voltage is more than the second threshold voltage, gives the second energy storage
Circuit charging.
Optionally, the first accumulator includes first capacitor device, first diode, resistance and transformer auxiliary winding,
In:
The first end of first diode is electrically connected with the first end of first capacitor device, the second end and resistance of first diode
First end electrical connection, the first end of the conducting direction of first diode from the second end of first diode to first diode；
The first end of auxiliary winding is electrically connected with the second end of resistance, and the of the second end of auxiliary winding and first capacitor device
Two ends ground connection.
Optionally, the first end of first capacitor device is also electrically connected with circuit load.
Optionally, the second accumulator includes the second capacitor, in which:
The first end of second capacitor is electrically connected with switching power circuit, the second end ground connection of the second capacitor.
Optionally, the first end of the second capacitor is electrically connected with the supply voltage pin of switching power circuit.
Optionally, device in one-way on state includes the second diode, in which:
The first end of second diode is electrically connected with the first end of the second capacitor, the second end of the second diode and first
The first end of capacitor is electrically connected.
According to the other side of one or more other embodiments of the present disclosure, a kind of control panel is provided, including such as above-mentioned
The power supply circuit that one embodiment is related to.
According to the other side of one or more other embodiments of the present disclosure, a kind of electrical equipment is provided, including such as above-mentioned
The control panel that any embodiment is related to.
Optionally, electrical equipment is air conditioner.
By the detailed description referring to the drawings to the exemplary embodiment of the disclosure, the other feature of the disclosure and its
Advantage will become apparent.
Detailed description of the invention
In order to illustrate more clearly of the embodiment of the present disclosure or technical solution in the prior art, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Disclosed some embodiments without any creative labor, may be used also for those of ordinary skill in the art
To obtain other drawings based on these drawings.
Fig. 1 is a kind of exemplary block diagram of power supply circuit in the prior art.
Fig. 2 is the exemplary block diagram of the power supply circuit of an embodiment of the present disclosure.
Fig. 3 is the exemplary block diagram of the power supply circuit of another embodiment of the disclosure.
Fig. 4 is the exemplary block diagram of the control panel of an embodiment of the present disclosure.
Fig. 5 is the exemplary block diagram of the electrical equipment of an embodiment of the present disclosure.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present disclosure, the technical solution in the embodiment of the present disclosure is carried out clear, complete
Site preparation description, it is clear that described embodiment is only disclosure a part of the embodiment, instead of all the embodiments.Below
Description only actually at least one exemplary embodiment be it is illustrative, never as to the disclosure and its application or making
Any restrictions.Based on the embodiment in the disclosure, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, belong to the disclosure protection range.
Unless specifically stated otherwise, positioned opposite, the digital table of the component and step that otherwise illustrate in these embodiments
Up to the unlimited the scope of the present disclosure processed of formula and numerical value.
Simultaneously, it should be appreciated that for ease of description, the size of various pieces shown in attached drawing is not according to reality
Proportionate relationship draw.
Technology, method and apparatus known to person of ordinary skill in the relevant may be not discussed in detail, but suitable
In the case of, the technology, method and apparatus should be considered as authorizing part of specification.
It is shown here and discuss all examples in, any occurrence should be construed as merely illustratively, without
It is as limitation.Therefore, the other examples of exemplary embodiment can have different values.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, then in subsequent attached drawing does not need that it is further discussed.
Fig. 1 is a kind of exemplary block diagram of power supply circuit in the prior art.As shown in Figure 1, when switching power source chip powers on,
Switching power source chip is charged by internal constant-current source to VCC pin, and then is charged to capacitor C1.When capacitor C1 voltage (that is,
VCC pin voltage) more than after voltage threshold, switching power source chip starts to export PWM (Pulse Width Modulation, arteries and veins
Rush width modulated) signal, high frequency transformer auxiliary winding begins with voltage output at this time, by resistance R1, diode D1 to electricity
Hold C1 to continue to power, guarantees that the voltage of capacitor C1 does not fall, to ensure the normal operation of switching power source chip.
In order to avoid switching power source chip overheat, the electric current to be charged by switching power source chip high pressure pin to capacitor C1 is non-
Often faint, this faint energy is not enough to powering load, can fill at all so as to cause the voltage on capacitor C1, i.e., electric
Hold the threshold power that the voltage on C1 is unable to reach switching power source chip starting.To which switching power source chip does not have pwm signal
Output, and then cause to there will not be voltage generation in auxiliary winding, thus cause switching power source chip not start normally.
To solve this problem, the disclosure is by passing through another way while powering to switching power source chip VCC pin
The route powering load being isolated, so that it is guaranteed that the normal work of switching power source chip.
Fig. 2 is the exemplary block diagram of the power supply circuit of an embodiment of the present disclosure.As shown in Fig. 2, the power supply circuit includes
Switching power circuit 21, the first accumulator 22, the second accumulator 23 and device in one-way on state 24.
Switching power circuit 21 charges to the second accumulator 23 after the power-up, in the tank voltage of the second accumulator 23
More than output pwm signal after the first threshold voltage, so as to the charging of the first accumulator 22.
Optionally, switching power circuit 21 is switching power source chip.
First accumulator 22 utilizes electric energy obtained, powers to circuit load.
Device in one-way on state 24 is electrically connected with the first accumulator 22 and the second accumulator 23 respectively, wherein one-way conduction
The conducting direction of device 24 is from first the 22 to the second accumulator of accumulator 23.
Optionally, the first accumulator 22 gives the second accumulator 23 also after tank voltage is more than the second threshold voltage
Charging.To ensure the voltage stabilization of switching power source chip VCC pin, guarantee that Switching Power Supply works normally.
In the power supply circuit of above-described embodiment, by the circuit that switching power source chip VCC pin will be given to power and to negative
The circuit for carrying power supply is isolated, so that it is guaranteed that the normal work of switching power source chip.
Fig. 3 is the exemplary block diagram of the power supply circuit of another embodiment of the disclosure.As shown in figure 3, in above-described embodiment
The first accumulator 22 include first capacitor device C1, first diode D1, resistance R1 and transformer auxiliary winding.Wherein:
The first end of first diode D1 is electrically connected with the first end of first capacitor device C1, the second end of first diode D1
It is electrically connected with the first end of resistance R1, the conducting direction of first diode D1 is from the second end of first diode to first diode
First end.
The first end of auxiliary winding is electrically connected with the second end of resistance R1, the second end and first capacitor device C1 of auxiliary winding
Second end ground connection.
After switching power source chip output pwm signal, power supply is generated in auxiliary winding, passes through resistance R1, first diode
D1 charges to first capacitor device C1.
Optionally, the first end of first capacitor device is also electrically connected with circuit load.That is, being circuit by the first accumulator 22
Load supplying influences so as to avoid due to powering load on caused by switching power source chip normal work.
Optionally, as shown in figure 3, the second accumulator 23 includes the second capacitor C2.
The first end of second capacitor C2 is electrically connected with switching power circuit, the second end ground connection of the second capacitor C2.
Optionally, the first end of the second capacitor C2 is electrically connected with the supply voltage VCC pin of switching power circuit.
Optionally, as shown in figure 3, device in one-way on state 24 includes the second diode D2.
The first end of second diode D2 is electrically connected with the first end of the second capacitor C2, the second end of the second diode D2
It is electrically connected with the first end of first capacitor device C1.
By the way that the second diode D2 is arranged, the first accumulator 21 and the second accumulator 22 can be isolated, to have
Effect, which is avoided, impacts the normal work of switching power source chip because of powering load.
Fig. 4 is the exemplary block diagram of the control panel of an embodiment of the present disclosure.It is supplied as shown in figure 4, being equipped in control panel 41
Circuit 42.Optionally, power supply circuit 42 can be the power supply circuit that Fig. 2 any embodiment into Fig. 3 is related to.
Fig. 5 is the exemplary block diagram of the electrical equipment of an embodiment of the present disclosure.As shown in figure 5, being set in electrical equipment 51
There is control panel 52.Optionally, the control panel that control panel 52 can be related to for any embodiment in Fig. 4.
Optionally, electrical equipment can be air conditioner, or other domestic or commercial electrical equipments.
By implementing the scheme of the disclosure, available following beneficial technical effect:
By the way that the circuit of the circuit powered to switching power source chip VCC pin and powering load to be isolated, thus really
Protect the normal work of switching power source chip.
It should be noted that in the embodiment shown in fig. 3, TR1 is high frequency transformer, high frequency transformer can be according to practical work
The voltage, power, output number for making circuit are designed.D3 is diode, and when selection pays attention to forward current, reverse withstand voltage, extensive
The multiple time.C3 is storage capacitor, and selection is to pay attention to pressure resistance, capacitance.R1 is loop resistance, and when selection pays attention to resistance value, pressure resistance, function
Rate.D1 is diode, and when selection pays attention to forward current, reverse withstand voltage, recovery time.C1 is storage capacitor, and selection is that attention is resistance to
Pressure, capacitance.D2 is diode, and when selection pays attention to forward current, reverse withstand voltage, recovery time.C2 is storage capacitor, and selection is note
Meaning pressure resistance, capacitance.
The description of the disclosure is given for the purpose of illustration and description, and is not exhaustively or by the disclosure
It is limited to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.It selects and retouches
Embodiment is stated and be the principle and practical application in order to more preferably illustrate the disclosure, and those skilled in the art is enable to manage
The solution disclosure is to design various embodiments suitable for specific applications with various modifications.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820091514.6U CN208299685U (en) | 2018-01-19 | 2018-01-19 | Power supply circuit, control board and electrical equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820091514.6U CN208299685U (en) | 2018-01-19 | 2018-01-19 | Power supply circuit, control board and electrical equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208299685U true CN208299685U (en) | 2018-12-28 |
Family
ID=64697091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820091514.6U Expired - Fee Related CN208299685U (en) | 2018-01-19 | 2018-01-19 | Power supply circuit, control board and electrical equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208299685U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107968559A (en) * | 2018-01-19 | 2018-04-27 | 珠海格力电器股份有限公司 | Power supply circuit, control panel, power utilization equipment and power supply method |
-
2018
- 2018-01-19 CN CN201820091514.6U patent/CN208299685U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107968559A (en) * | 2018-01-19 | 2018-04-27 | 珠海格力电器股份有限公司 | Power supply circuit, control panel, power utilization equipment and power supply method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181228 |