CN204030957U - A kind of non-isolated power supply for refrigerator master control borad, refrigerator master control borad and refrigerator - Google Patents
A kind of non-isolated power supply for refrigerator master control borad, refrigerator master control borad and refrigerator Download PDFInfo
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- CN204030957U CN204030957U CN201420400997.5U CN201420400997U CN204030957U CN 204030957 U CN204030957 U CN 204030957U CN 201420400997 U CN201420400997 U CN 201420400997U CN 204030957 U CN204030957 U CN 204030957U
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Abstract
The utility model provides a kind of non-isolated power supply for refrigerator master control borad, refrigerator master control borad and refrigerator.For a non-isolated power supply for refrigerator master control borad, comprising: be galvanic rectification unit by the AC conversion of input; The direct current receiving self-rectifying unit is carried out to the input filter unit of filtering; Converter unit, comprises DC/DC transducer; For providing power supply and the voltage regulation unit of burning voltage to converter unit; Electric current is kept to continue the afterflow unit exported when disconnecting for the switch element in DC/DC transducer; And feedback unit, feedback signal switching on and off with control switch element about output voltage can be provided to converter unit, the output of input filter unit is connected with converter unit, the input of afterflow unit is connected with converter unit, the output of afterflow unit is connected with the input of feedback unit, the output of feedback unit is connected with converter unit, and power supply is connected with converter unit with voltage regulation unit, and the output of afterflow unit is the output of non-isolated power supply.
Description
Technical field
The utility model relates to power technique fields, more specifically, relates to a kind of non-isolated power supply for refrigerator master control borad, and has master control borad and the refrigerator of this non-isolated power supply.
Background technology
Master control borad is a critical component in refrigerator and other household electrical appliance, and it implements the major function of the household electrical appliance such as refrigerator, and the power supply in master control borad to be master control borad power.
At present, non-isolated power supply (non-isolated power) has been used in master control borad.Non-isolated power supply refers to and do not carry out electrical isolation by transformer between input and load end, but directly connects, and input and load end are altogether.
Had some to develop to the application of DC-DC non-isolated power source design in prior art, and wherein to use maximum be the direct voltage dropping power supply of non-isolated.Such as, but it is mostly smaller that the band of existing technical scheme carries power, below 5W, and peripheral cell is more complicated, security reliability is unstable, because which limit the use of non-isolated power supply.
Therefore be necessary to study a kind of new non-isolated power supply, it can realize large band and carry power, and cellular construction is simple, and fail safe is high.
Utility model content
For solving the problem, according to first aspect of the present utility model, a kind of non-isolated power supply for refrigerator master control borad being provided, it is characterized in that, comprising:
Be galvanic rectification unit by the AC conversion of input;
The direct current being received from described rectification unit is carried out to the input filter unit of filtering;
Converter unit, it comprises a DC/DC transducer;
For providing power supply and the voltage regulation unit of burning voltage to described converter unit;
Electric current is kept to continue the afterflow unit exported when disconnecting for the switch element in described DC/DC transducer; And
Feedback unit, it can provide feedback signal about output voltage to control switching on and off of described switch element to described converter unit,
The output of wherein said input filter unit is connected with described converter unit, the input of described afterflow unit is connected with described converter unit, the output of described afterflow unit is connected with the input of described feedback unit, the output of described feedback unit is connected with described converter unit, described power supply is connected with described converter unit with voltage regulation unit, and the output of wherein said afterflow unit is the output of described non-isolated power supply.
According to a preferred embodiment of the utility model first aspect, described switch element is MOSFET.
According to a preferred embodiment of the utility model first aspect, also comprise protected location, this protected location is arranged on the input of described non-isolated power supply, and the output of this protected location is connected to the input of described rectification circuit.
According to a preferred embodiment of the utility model first aspect, also comprise output voltage regulation unit, the input of this output voltage regulation unit is connected with the output of described afterflow unit.
According to a preferred embodiment of the utility model first aspect, also comprise output filtering unit, the input of this output filtering unit is connected with the output of this output voltage regulation unit.
According to a preferred embodiment of the utility model first aspect, this rectification unit is made up of half-wave rectifying circuit.
According to a preferred embodiment of the utility model first aspect, this input filter unit is made up of π type filter circuit.
According to a preferred embodiment of the utility model first aspect, this power supply and voltage regulation unit comprise a capacitor and a diode, wherein to be connected to the power supply of described converter unit extreme the negative pole of this diode and one end of this capacitor, the positive pole of this diode is connected with the output of described non-isolated power supply, and the other end of this capacitor is connected to the ground end of described converter unit.
According to a preferred embodiment of the utility model first aspect, this afterflow unit comprises a diode, a resistor and an inductor, when switch element in described DC/DC transducer disconnects, electric current flow to described resistor from described diode, then flow to described inductor, finally flow to the output of described non-isolated power supply.
According to a preferred embodiment of the utility model first aspect, this feedback unit comprises the first resistor, the second resistor, an optocoupler and a capacitor, wherein this first resistor is connected with this second resistor in series, and one end of this first resistor is connected to the output of described non-isolated power supply, this second resistor, this optocoupler and this capacitor are connected in parallel, and one end of this capacitor is connected to the feedback end of described converter unit, the other end of this capacitor is connected to the ground end of described converter unit.
According to a preferred embodiment of the utility model first aspect, described output voltage regulation unit comprises a capacitor, and this capacitor is connected in parallel on the output of described non-isolated power supply.
According to a preferred embodiment of the utility model first aspect, described output filtering unit comprises a capacitor, and this capacitor is connected in parallel on the output of described non-isolated power supply.
According to second aspect of the present utility model, provide a kind of refrigerator master control borad, it comprises above-mentioned non-isolated power supply.
According to the third aspect of the present utility model, provide a kind of refrigerator, it comprises above-mentioned refrigerator master control borad.
Compared with prior art, the utility model at least has the following advantages: the utility model can provide larger power output capacity, and cost is low, and structure is simple, reliability is high.
Accompanying drawing explanation
Fig. 1 is the block diagram of the non-isolated power supply according to the utility model embodiment;
Fig. 2 is the part-structure block diagram of the non-isolated power supply illustrated according to the utility model embodiment;
Fig. 3 is the concrete structure figure of the non-isolated power supply according to the utility model embodiment;
Fig. 4 is the schematic diagram of the refrigerator electric control plate according to the utility model embodiment;
Fig. 5 is the refrigerator schematic diagram according to the utility model embodiment.
Should be understood that accompanying drawing is only drawn for illustrative purposes, should not be considered as being to restriction of the present utility model.
Embodiment
According to first aspect of the present utility model, non-isolated power supply comprises: be galvanic rectification unit by the AC conversion of input, the direct current being received from described rectification unit is carried out to the input filter unit of filtering, converter unit, it comprises a DC/DC transducer, for providing power supply and the voltage regulation unit of burning voltage to described converter unit, electric current is kept to continue the afterflow unit exported when disconnecting for the switch element in described DC/DC transducer, and feedback unit, it can provide feedback signal about output voltage to control switching on and off of described switch element to described converter unit, the output of wherein said input filter unit is connected with described converter unit, the input of described afterflow unit is connected with described converter unit, the output of described afterflow unit is connected with the input of described feedback unit, the output of described feedback unit is connected with described converter unit, described power supply is connected with described converter unit with voltage regulation unit, the output of wherein said afterflow unit is the output of described non-isolated power supply.
Preferably, DC/DC transducer in converter unit can adopt BM2P054F type DC/DC transducer, wherein, the first output of input filter unit is connected to the drain electrode end of transducer, and the second output of input filter unit is connected to the earth terminal of non-isolated power supply.The first input end of afterflow unit is connected to the source terminal of transducer, second input of afterflow unit is connected to the earth terminal of non-isolated power supply, the three-terminal link of afterflow unit is to the ground end of transducer, and the output of afterflow unit is as the output of non-isolated power supply.The power supply that power supply and the first end of voltage regulation unit are connected to transducer is extreme, and the second end of power supply and voltage regulation unit is connected to the ground end of transducer, and the three-terminal link of power supply and voltage regulation unit is to the output of afterflow unit.The first end of feedback unit is connected to the output of afterflow unit, and the second end of feedback unit is connected to the feedback end of transducer, and the three-terminal link of feedback unit is to the ground end of transducer.
According to second aspect of the present utility model, provide a kind of refrigerator master control borad, this refrigerator master control borad comprises non-isolated power supply of the present utility model.
According to the third aspect of the present utility model, provide a kind of refrigerator, this refrigerator comprises above-mentioned refrigerator master control borad.
Each embodiment of the present utility model is further described below in conjunction with accompanying drawing.In all of the figs, same or analogous label represents same or analogous element or has the element of same or similar function.Should be understood that the embodiment described below in conjunction with accompanying drawing is only exemplary, being intended to for explaining the utility model, and be not intended to limit the utility model.
In this article, the sequence word such as term " first ", " second ", " the 3rd ", " the 4th " is only for convenience, does not limit the scope that the utility model is claimed.
See Fig. 1, this figure is the block diagram of the non-isolated power supply 100 according to the utility model embodiment.
As shown in Figure 1, rectification unit 102, input filter unit 103, converter unit 104, power supply and voltage regulation unit 106, afterflow unit 105 and feedback unit 107 is comprised according to the non-isolated power supply 100 of the utility model embodiment.Wherein the output of rectification unit 102 is connected to the input of input filter unit 103, the output of input filter unit 103 is connected to converter unit 104, and converter unit 104 is also connected with power supply and voltage regulation unit 106, afterflow unit 105 and feedback unit 107.The input of afterflow unit 105 is connected with converter unit 104, the output of afterflow unit 105 is connected with the input of feedback unit 107, the output of feedback unit 107 is connected with converter unit 104, power supply is connected with converter unit 104 with voltage regulation unit 106, and wherein the output of afterflow unit 105 is the output of non-isolated power supply 100.
Preferably, as shown in Figure 1, non-isolated power supply 100 also can comprise protected location 101.The input of protected location 101 is as the input of non-isolated power supply 100, and the output of protected location 101 is connected to the input of rectification unit 102.Non-isolated power supply 100 also can comprise output voltage regulation unit 108, and the input exporting voltage regulation unit 108 is connected with the output of afterflow unit 105, and the output exporting voltage regulation unit 108 can be used as the output of non-isolated power supply 100.Non-isolated power supply 100 also can comprise output filtering unit 109, and the input of output filtering unit 109 is connected with the output exporting voltage regulation unit 108, and the output of output filtering unit 109 is as the output of non-isolated power supply 100.
Described protected location 101 is protected described non-isolated power supply 100, causes damage to prevent excessive curtage etc. to described non-isolated power supply 100.
The interchange of input is converted into direct current by described rectification unit 102, namely achieves the conversion of AC-DC.
The direct current that described input filter unit 103 pairs of rectification units 102 export carries out filtering.
Described converter unit 104 comprises DC/DC transducer, preferably PWM DC/DC transducer.
The switch element of described afterflow unit 105 in described converter unit 104 keeps electric current to continue to export when closing.
Described power supply and voltage regulation unit 106 realize power supply to converter unit 104 and voltage stabilizing.
Output voltage is fed back to converter unit 104 by described feedback unit 107, the operation of regulating rotary exchange unit 104.
Described output voltage regulation unit 108 regulated output voltage.
Described output filtering unit 109 pairs of output voltages carry out filtering.
Should be understood that non-isolated power supply of the present utility model is not to comprise above-mentioned all unit or unit, it can only comprise a part of unit or unit.In addition, non-isolated power supply of the present utility model also can comprise other unit or unit of not describing in this specification.
As described above, described converter unit 104 comprises DC/DC transducer, preferably, DC/DC transducer adopts the BM2P054F type DC/DC transducer of Rohm company, as shown in Figure 2, wherein the first output of input filter unit 103 is connected to the drain electrode end (D end) of transducer, and the second output of input filter unit 103 is connected to the earth terminal of non-isolated power supply 100.The first input end of afterflow unit 105 is connected to the source terminal (S end) of transducer, second input of afterflow unit 105 is connected to the earth terminal of non-isolated power supply 100, the three-terminal link of afterflow unit 105 is to the ground end (GND end) of transducer, and the output of afterflow unit 105 is as the output of non-isolated power supply 100.Power supply and the first end of voltage regulation unit 106 are connected to the power supply extreme (VCC end) of transducer, and the second end of power supply and voltage regulation unit 106 is connected to the ground end of transducer, power and the three-terminal link of voltage regulation unit to the output of afterflow unit 105.The first end of feedback unit 107 is connected to the output of afterflow unit 105, and the second end of feedback unit 107 is connected to the feedback end of transducer (FB end), and the three-terminal link of feedback unit 107 is to the ground end of transducer.
Fig. 3 is the concrete structure figure of the non-isolated power supply according to the utility model embodiment, it illustrates each part of non-isolated power supply 100.
Alternatively, non-isolated power supply is provided with protected location 101, and it is arranged on the input of power supply, is made up of fuse F1, piezo-resistance RV1 and capacitor CX2.Wherein connect with fuse F1 after piezo-resistance RV1 and capacitor CX2 parallel connection.The first end of fuse F1 is as the first input end of non-isolated power supply 100, and second end of fuse F1 is connected with the first end of piezo-resistance RV1 with capacitor CX2.Second end of capacitor CX2 and piezo-resistance RV1 is as the second input of non-isolated power supply 100.This protected location can play over-current over-voltage protection.But should be understood that other suitable protected locations are also feasible.
Rectification unit 102 is made up of common mode inductance FL1, thermistor RT1, diode D1 and D2.The first end of the first input end of common mode inductance FL1 and the capacitor CX2 of protected location 101; namely the first output of protected location 101 is connected; second end of second input of common mode inductance FL1 and the capacitor CX2 of protected location 101, namely the second output of protected location 101 is connected.Should be understood that when not arranging protected location in power supply, the first input end of common mode inductance FL1 is as the first input end of non-isolated power supply 100, and second input of common mode inductance FL1 is as the second input of non-isolated power supply 100.First output of common mode inductance FL1 is connected with the positive pole of diode D1, and second output of common mode inductance FL1 is connected with the first end of thermistor RT1.Second end of thermistor RT1 is connected with the negative pole of diode D2.The negative pole of diode D1 is as the first output of rectification unit 102, and the positive pole of diode D2 is as the second output of rectification unit 102.In rectification unit 102, common mode inductance FL1 eliminates common mode disturbances, thermistor RT1 surge current suppression.In this embodiment, the rectification unit 102 adopted utilizes two diode D1 and D2 to realize halfwave rectifier, but the utility model is not limited thereto, and full wave rectifying unit, bridge rectifier unit etc. are all applicable to the utility model.
Input filter unit 103 is made up of capacitor CE1, CE2 and inductor L1.The first end of capacitor CE1 is connected to the negative pole of the diode D1 in rectification unit 102 as the first input end of input filter unit 103, and second end of capacitor CE1 is connected to the positive pole of the diode D2 in rectification unit 102 as the second input of input filter unit 103.The first end of inductor L1 is connected to the negative pole of the diode D1 in rectification unit 102, and second end of inductor L1 is connected to the first end of capacitor CE2, and second end of capacitor CE2 is connected to second end of capacitor CE1.The first end of capacitor CE2 is the first output of input filter unit 103, and second end of capacitor CE2 is the second output of input filter unit 103.In this embodiment, input filter unit 103 is the filtering of π type, and the interchange cost that filtering is unnecessary and other harmonic waves, also play input pressure stabilization function.Similarly, non-isolated power supply of the present utility model also can use the filter unit of other types.Preferably, capacitor CE1, CE2 adopts polarity electrolytic capacitor.
Converter unit 104 receives the filtered more smooth direct current from described input filter unit 103.Converter unit 104 can comprise DC/DC transducer.In this embodiment, for the BM2P054F cake core of Rohm, but should be understood that the utility model also can adopt the DC/DC transducer of other types.As shown in Figure 3, the drain electrode end D that filtered direct current is input to transducer holds, and drain electrode end D holds the first end with capacitor CE2, is namely connected with the first output of input filter unit 103.The source terminal S end of Rohm chip is connected with the first end of the resistance R101 in afterflow unit 105 and the negative pole of sustained diode 3, namely be connected with the first input end of afterflow unit 105, the electric current flowing into source S is Ics=0.4V/Rcs, Rcs is current-limiting resistance, in this embodiment, current-limiting resistance is resistance R101.The earth terminal GND of Rohm chip is floating ground, and it is connected to second end of resistor R101.The feedback end FB of Rohm chip is connected to the capacitor C101 in feedback unit 107, and capacitor C101 will be described hereinafter, and the magnitude of voltage at feedback end FB place determines the operating state of Rohm chip.The extreme VCC of power supply of Rohm chip is connected to the negative pole of diode D4 in power supply and voltage regulation unit 106 and the first end of capacitor CE4, and diode D4 and capacitor CE4 will be described hereinafter.
Between drain electrode end D holds and source terminal S holds, be provided with switch element MOSFET (not shown), MOSFET plays on-off action.When MOSFET opens, electric current is held from drain electrode end D and is flowed into, and exports from source terminal S end, exports output to through resistor R101.When output voltage is too high, during higher than normal output voltage, the voltage on the feedback resistance R103 in feedback unit 107 raises, and the voltage at 1, the 2 terminal two ends of optocoupler IC2 increases, thus make 3, the 4 end conductings of optocoupler IC2, and then the voltage that feedback end FB is held raises.The voltage of FB end raises and MOSFET is disconnected, and now electric current flow to the diode D3 of afterflow unit 105 from the ground end of power supply 100, then flow to the output of power supply 100 through resistance R101, inductor L3.After output end voltage drops to normal output voltage, MOSFET opens, and this process repeats, thus keeps the stable of output voltage.
Afterflow unit 105 comprises diode D3, resistor R101 and inductor L3.Diode D3 is used for making electric current continue flowing when MOSFET disconnects, and resistor R101 limits the electric current flowing into source terminal, and inductor L3 is used for energy storage and voltage transitions.The first end of resistor R101 is connected to the negative pole of diode D3 as the first input end of afterflow unit 105, and is connected to the source terminal S end of transducer.Second end of resistor R101 is connected to the first end of inductor L3, and the ground end GND that second end of resistor R101 is also connected to transducer holds.Second end of inductor L3 can be used as the output of non-isolated power supply 100, and the positive terminal of diode D3 can be connected with the second input of input filter unit 103, and is connected with the earth terminal of non-isolated power supply 100.
As described above, when MOSFET disconnects, afterflow unit 105 makes electric current continue flowing, and now the voltage of output remains on normal output voltage.
Power supply and voltage regulation unit 106 comprise diode D4 and capacitor CE4.The VCC end that power supply and voltage regulation unit 106 are converter unit 104 provides burning voltage, thus ensures the normal operation of converter unit 104.The negative pole of diode D4 and the first end of capacitor CE4 are connected to the VCC end of transducer, and second end of capacitor CE4 is connected to the GND end of transducer.The positive pole of diode D4 is connected to the output of non-isolated power supply 100.Preferably, capacitor CE4 adopts polarity electrolytic capacitor.
Feedback unit 107 comprises resistor R102 and R103, optocoupler IC2 and capacitor C101, and wherein resistor 102 and 103 arranges feedback voltage, and the effect of optocoupler IC2 is as explained above, and capacitor C101 is used for stablizing feedback voltage.Resistor R102 and R103 connects, and the first end of resistor R102 is connected to the output of non-isolated power supply 100, and second end of R103 is connected to the second input of optocoupler.Second end of resistor R102 and the first end of R103 are connected to the first input end of optocoupler jointly, and the first output of optocoupler is connected to the GND end of transducer, and the second output of optocoupler is connected to the FB end of transducer.The first end of capacitor C101 is also connected to the FB end of transducer, and second end of capacitor C101 is connected to the GND end of transducer.Preferably, feedback unit 107 also can comprise voltage stabilizing didoe ZD1, and the positive pole of this voltage stabilizing didoe ZD1 is connected to the earth terminal of non-isolated power supply 100, and negative pole is connected to the second input of optocoupler.
Export voltage regulation unit 108 and comprise capacitor CE3, and output filtering unit 109 comprises capacitor CE9.The first end of capacitor CE3 and capacitor CE9 is connected to the output of non-isolated power supply 100, and second end of capacitor CE3 and capacitor CE9 is connected to the earth terminal of non-isolated power supply 100.Preferably, capacitor CE3 and CE9 is electrolytic capacitor.
In addition, as shown in Figure 2, non-isolated power supply 100 also can comprise diode ZD2, for carrying out pressure limiting to the VCC end of Rohm chip.Diode ZD2 and CE4 is connected in parallel.
In addition, non-isolated power supply 100 also can comprise high-voltage capacitor CY1, and this capacitor is connected between drain electrode end and source terminal, for the overshoot voltage between drain electrode end and source terminal.
The output voltage of 8.9-26V can be realized according to the non-isolated power supply of above-mentioned embodiment of the present utility model, and can up to the power output of 10W.
Fig. 4 is the schematic diagram of the refrigerator master control borad according to the utility model embodiment.
As shown in Figure 4, non-isolated power supply 100 is comprised according to refrigerator master control borad 300 of the present utility model.
Fig. 5 is the refrigerator schematic diagram according to the utility model embodiment.
As shown in Figure 5, refrigerator master control borad 300 is comprised according to refrigerator 400 of the present utility model.
Should be understood that embodiment herein and embodiment only for illustrative purposes, under the prerequisite not departing from claims limited range, those skilled in the art can make multiple remodeling and variant accordingly.
Claims (14)
1., for a non-isolated power supply for refrigerator master control borad, it is characterized in that, comprising:
Be galvanic rectification unit by the AC conversion of input;
The direct current being received from described rectification unit is carried out to the input filter unit of filtering;
Converter unit, it comprises a DC/DC transducer;
For providing power supply and the voltage regulation unit of burning voltage to described converter unit;
Electric current is kept to continue the afterflow unit exported when disconnecting for the switch element in described DC/DC transducer; And
Feedback unit, it can provide feedback signal about output voltage to control switching on and off of described switch element to described converter unit,
The output of wherein said input filter unit is connected with described converter unit, the input of described afterflow unit is connected with described converter unit, the output of described afterflow unit is connected with the input of described feedback unit, the output of described feedback unit is connected with described converter unit, described power supply is connected with described converter unit with voltage regulation unit, and the output of wherein said afterflow unit is the output of described non-isolated power supply.
2. non-isolated power supply according to claim 1, is characterized in that, described switch element is MOSFET.
3. non-isolated power supply according to claim 1 and 2, is characterized in that, also comprise protected location, and this protected location is arranged on the input of described non-isolated power supply, and the output of this protected location is connected to the input of described rectification circuit.
4. non-isolated power supply according to claim 1 and 2, is characterized in that, also comprises output voltage regulation unit, and the input of this output voltage regulation unit is connected with the output of described afterflow unit.
5. non-isolated power supply according to claim 4, is characterized in that, also comprises output filtering unit, and the input of this output filtering unit is connected with the output of this output voltage regulation unit.
6. non-isolated power supply according to claim 1 and 2, is characterized in that, this rectification unit is made up of half-wave rectifying circuit.
7. non-isolated power supply according to claim 1 and 2, is characterized in that, this input filter unit is made up of π type filter circuit.
8. non-isolated power supply according to claim 1 and 2, it is characterized in that, this power supply and voltage regulation unit comprise a capacitor and a diode, wherein to be connected to the power supply of described converter unit extreme the negative pole of this diode and one end of this capacitor, the positive pole of this diode is connected with the output of described non-isolated power supply, and the other end of this capacitor is connected to the ground end of described converter unit.
9. non-isolated power supply according to claim 1 and 2, it is characterized in that, this afterflow unit comprises a diode, a resistor and an inductor, when switch element in described DC/DC transducer disconnects, electric current flow to described resistor from described diode, then flow to described inductor, finally flow to the output of described non-isolated power supply.
10. non-isolated power supply according to claim 1 and 2, it is characterized in that, this feedback unit comprises the first resistor, the second resistor, an optocoupler and a capacitor, wherein this first resistor is connected with this second resistor in series, and one end of this first resistor is connected to the output of described non-isolated power supply, this second resistor, this optocoupler and this capacitor are connected in parallel, and one end of this capacitor is connected to the feedback end of described converter unit, the other end of this capacitor is connected to the ground end of described converter unit.
11. non-isolated power supplys according to claim 4, it is characterized in that, described output voltage regulation unit comprises a capacitor, this capacitor is connected in parallel on the output of described non-isolated power supply.
12. non-isolated power supplys according to claim 5, it is characterized in that, described output filtering unit comprises a capacitor, this capacitor is connected in parallel on the output of described non-isolated power supply.
13. 1 kinds of refrigerator master control borads, is characterized in that, comprise the non-isolated power supply according to any one of claim 1-12.
14. 1 kinds of refrigerators, is characterized in that, comprise refrigerator master control borad according to claim 13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420400997.5U CN204030957U (en) | 2014-07-18 | 2014-07-18 | A kind of non-isolated power supply for refrigerator master control borad, refrigerator master control borad and refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420400997.5U CN204030957U (en) | 2014-07-18 | 2014-07-18 | A kind of non-isolated power supply for refrigerator master control borad, refrigerator master control borad and refrigerator |
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| Publication Number | Publication Date |
|---|---|
| CN204030957U true CN204030957U (en) | 2014-12-17 |
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| CN201420400997.5U Expired - Fee Related CN204030957U (en) | 2014-07-18 | 2014-07-18 | A kind of non-isolated power supply for refrigerator master control borad, refrigerator master control borad and refrigerator |
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| CN (1) | CN204030957U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104104227A (en) * | 2014-07-18 | 2014-10-15 | 合肥美的电冰箱有限公司 | Non-isolated power supply for refrigerator main control panel, refrigerator main control panel and refrigerator |
-
2014
- 2014-07-18 CN CN201420400997.5U patent/CN204030957U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104104227A (en) * | 2014-07-18 | 2014-10-15 | 合肥美的电冰箱有限公司 | Non-isolated power supply for refrigerator main control panel, refrigerator main control panel and refrigerator |
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