CN104155607A - Stalling detecting circuit for refrigerator fan motor, refrigerator and control method of refrigerator - Google Patents
Stalling detecting circuit for refrigerator fan motor, refrigerator and control method of refrigerator Download PDFInfo
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- CN104155607A CN104155607A CN201410387472.7A CN201410387472A CN104155607A CN 104155607 A CN104155607 A CN 104155607A CN 201410387472 A CN201410387472 A CN 201410387472A CN 104155607 A CN104155607 A CN 104155607A
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- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000010257 thawing Methods 0.000 claims abstract description 18
- 238000001514 detection method Methods 0.000 claims description 42
- 230000003321 amplification Effects 0.000 claims description 7
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 7
- 230000002159 abnormal effect Effects 0.000 abstract description 15
- 230000008859 change Effects 0.000 abstract description 5
- 238000005057 refrigeration Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 6
- 230000000630 rising effect Effects 0.000 description 4
- 239000002918 waste heat Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
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Abstract
The invention provides a stalling detecting circuit for a refrigerator fan motor. The stalling detecting circuit comprises a current detecting circuit, an amplifying circuit and a control circuit, wherein the input end of the current detecting circuit is connected to a drive circuit of the refrigerator fan motor and detects current passing the drive circuit in the refrigerator fan motor; the input end of the amplifying circuit is connected to the output end of the current detecting circuit, and the amplifying circuit is used for amplifying a first voltage signal output by the current detecting circuit to output an amplified second voltage signal; and the control circuit is connected to the amplifying circuit, receives the second voltage signal output by the amplifying circuit and judges whether stalling happens to the refrigerator fan motor according to change of the second voltage signal. Correspondingly, the invention further provides a refrigerator and a control method of the refrigerator. With the adoption of the technical scheme, the current signal of the fan motor can be detected; and if the fan motor abnormally stalls, the control circuit of the refrigerator performs forced defrosting control or gives an alarm after an abnormal feedback signal is detected, so that abnormal refrigeration of the refrigerator is avoided.
Description
Technical field
The present invention relates to refrigerator technical field, in particular to the control method of a kind of testing circuit of refrigerator fan motor stall, a kind of refrigerator and a kind of refrigerator.
Background technology
The fan electromotor using on refrigerator at present cannot detect the abnormal stall of fan, or can detect the abnormal stall of fan, but not in the time of the abnormal stall of fan, correspondingly controls, thereby cause refrigeration for refrigerator abnormal, and user experiences not good.
Therefore, how to detect the abnormal stall of fan and how in the time of the abnormal stall of fan, correspondingly to control, becoming technical matters urgently to be resolved hurrily at present.
Summary of the invention
The present invention is intended at least solve one of technical matters existing in prior art or correlation technique.
For this reason, one object of the present invention has been to propose a kind of testing circuit of refrigerator fan motor stall.
Another object of the present invention is to have proposed a kind of refrigerator.
A further object of the present invention has been to propose a kind of control method of refrigerator.
For achieving the above object, embodiment according to a first aspect of the invention, a kind of testing circuit of refrigerator fan motor stall has been proposed, comprise: current detection circuit, the input end of described current detection circuit is connected to the driving circuit of described refrigerator fan motor, detects by the electric current in refrigerator fan motor driving circuit; Amplifying circuit, the input end of described amplifying circuit is connected to the output terminal of described current detection circuit, the first voltage signal of described current detection circuit output is amplified to processing, to export the second voltage signal after amplification; Control circuit, is connected to described amplifying circuit, receives the second voltage signal of described amplifying circuit output, and judges according to the variation of described second voltage signal whether the motor of described fan of refrigerator stall occurs.
The testing circuit of refrigerator fan motor stall according to an embodiment of the invention, detect the electric current in fan electromotor by current detection circuit, by the output voltage of amplifying circuit amplified current testing circuit, thereby by judging that the variation of voltage judges whether the motor of fan of refrigerator stall occurs.
According to one embodiment of present invention, described current detection circuit comprises: current sense resistor, one end of described current sense resistor is connected to the input end of described motor and described amplifying circuit, the other end ground connection of described current sense resistor.
The testing circuit of refrigerator fan motor stall according to an embodiment of the invention, can adopt current sense resistor to detect the electric current in motor, thereby according to the electric current in motor, the state of motor be judged.
According to one embodiment of present invention, also comprise: described amplifying circuit comprises: the first resistance, the second resistance and operational amplifier, the positive input terminal of described operational amplifier is connected to the output terminal of described current detection circuit, described the first resistance and described the second resistance are connected in series between the output terminal and ground of described operational amplifier, and the negative input end of described operational amplifier is connected to the common port of described the first resistance and described the second resistance.
The testing circuit of refrigerator fan motor stall according to an embodiment of the invention, amplifying circuit is made up of operational amplifier, the first resistance and the second resistance, wherein, the first resistance and the second resistance have determined the enlargement factor of amplifying circuit, can realize the different enlargement factor of employing by adjusting the resistance size of the first resistance and the second resistance.
According to one embodiment of present invention, also comprise: current-limiting resistance, be connected between the output terminal of described current detection circuit and the input end of described amplifying circuit, restriction enters the electric current of described amplifying circuit.
The testing circuit of refrigerator fan motor stall according to an embodiment of the invention, between current detection circuit and amplifying circuit, is also connected with current-limiting resistance, thereby when the electric current in motor increases suddenly, amplifying circuit is played to certain protective effect.
According to one embodiment of present invention, also comprise: impedance matching resistance, is connected between the output terminal and described control circuit of described amplifying circuit, to mate the impedance of described amplifying circuit and described control circuit.
The testing circuit of refrigerator fan motor stall according to an embodiment of the invention, between amplifying circuit and control circuit, is connected with impedance matching resistance, thereby the voltage of amplifying circuit output can be matched with control circuit.
Embodiment according to a second aspect of the invention, also provides a kind of refrigerator, comprising: the testing circuit of the refrigerator fan motor stall in technique scheme described in any one; Warning circuit, is connected to the control circuit in the testing circuit of described refrigerator fan motor stall, and in the time that described control circuit judges described motor generation stall, the alarm command sending according to the described control circuit receiving carries out alarm.
Refrigerator according to an embodiment of the invention, comprises and like this, in the time of motor generation stall, can carry out testing circuit and the warning circuit of the refrigerator fan motor stall in technique scheme alarm, thereby avoid refrigerator extremely to freeze.
According to one embodiment of present invention, also comprise: display circuit, be connected to described control circuit, in the time that described control circuit judges described motor generation stall, the fault reveal codes of the motor rotation blockage sending according to the described control circuit receiving shows.
Refrigerator according to an embodiment of the invention, except carrying out alarm, can also show failure code, thereby facilitates user to know the concrete fault of refrigerator, to take the corresponding operation of processing.
According to one embodiment of present invention, also comprise: defrosting circuit, be connected to described control circuit, in the time that described control circuit judges described motor generation stall, defrost operation is carried out in the defrosting order sending according to the described control circuit receiving.
Refrigerator according to an embodiment of the invention, the electric fan blower fan stall of refrigerator, very large probability is because there is ice to block the blade of fan electromotor, so by defrost possibility head it off, now refrigerator is forced defrost operation, and defrost exits temperature, spends than original rising 10, ensure defrost time long enough, and waste heat can melt blower fan place freeze.When implementing after as above control, can also timing detection failure whether recover, as voltage recovers normal range, illustrate that stall problem is solved.
Embodiment according to a third aspect of the invention we, a kind of control method of refrigerator is also provided, described refrigerator comprises the testing circuit of refrigerator fan motor stall, display circuit, warning circuit and defrosting circuit, described testing circuit comprises current detection circuit, amplified current and control circuit, the control method of described refrigerator, comprising: described current detection circuit detects the electric current in described refrigerator fan motor driving circuit; The first voltage signal of described current detection circuit output is amplified processing by described amplifying circuit, to export the second voltage signal after amplification; Described control circuit receives the second voltage signal of described amplifying circuit output, and judges according to the variation of described second voltage signal whether the motor of described fan of refrigerator stall occurs.
The control method of refrigerator according to an embodiment of the invention, detect by the electric current in fan electromotor driving circuit by current detection circuit, by the output voltage of amplifying circuit amplified current testing circuit, thereby by judging that the variation of voltage judges whether the motor of fan of refrigerator stall occurs.
According to one embodiment of present invention, the described variation according to described second voltage signal judges that whether the motor of described fan of refrigerator stall occurs, and specifically comprises: judge that whether moment reduces after increasing described second voltage signal; Judge described second voltage signal moment while reducing after increasing double, judge described motor generation stall.
The control method of refrigerator according to an embodiment of the invention, change and judge whether motor stall occurs according to voltage signal, be specially judge voltage signal whether moment reduce after increasing, if double or repeated detection, to this this variation, judges motor generation stall.
According to one embodiment of present invention, also comprise: in the time that described control circuit judges described motor generation stall, the alarm command that described warning circuit sends according to the described control circuit receiving carries out alarm.
The control method of refrigerator according to an embodiment of the invention, in the time of motor generation stall, can carry out alarm, thereby avoid refrigerator extremely to freeze.
According to one embodiment of present invention, also comprise: in the time that described control circuit judges described motor generation stall, the fault reveal codes of the motor rotation blockage that described display circuit sends according to the described control circuit receiving shows.
The control method of refrigerator according to an embodiment of the invention, except carrying out alarm, can also show failure code, thereby facilitates user to know the concrete fault of refrigerator, to take the corresponding operation of processing.
According to one embodiment of present invention, also comprise: in the time that described control circuit judges described motor generation stall, defrost operation is carried out in the defrosting order that described defrosting circuit sends according to the described control circuit receiving.
The control method of refrigerator according to an embodiment of the invention, the electric fan blower fan stall of refrigerator, very large probability is because there is ice to block the blade of fan electromotor, so by defrost possibility head it off, now refrigerator is forced defrost operation, and defrost exits temperature, spends than original rising 10, ensure defrost time long enough, and waste heat can melt blower fan place freeze.When implementing after as above control, can also timing detection failure whether recover, as voltage recovers normal range, illustrate that stall problem is solved.
Additional aspect of the present invention and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Brief description of the drawings
Above-mentioned and/or additional aspect of the present invention and advantage accompanying drawing below combination is understood becoming the description of embodiment obviously and easily, wherein:
Fig. 1 shows the structural representation of the testing circuit of refrigerator fan motor stall according to an embodiment of the invention;
Fig. 2 shows the structural representation of refrigerator according to an embodiment of the invention;
Fig. 3 is the schematic flow diagram of the control method of refrigerator according to an embodiment of the invention;
Fig. 4 shows the circuit diagram of the testing circuit of refrigerator fan motor stall according to an embodiment of the invention;
Fig. 5 shows the idiographic flow schematic diagram of the control method of refrigerator according to an embodiment of the invention.
Embodiment
In order more clearly to understand above-mentioned purpose of the present invention, feature and advantage, below in conjunction with the drawings and specific embodiments, the present invention is further described in detail.It should be noted that, in the situation that not conflicting, the feature in the application's embodiment and embodiment can combine mutually.
A lot of details are set forth in the following description so that fully understand the present invention; but; the present invention can also adopt other to be different from other modes described here and implement, and therefore, protection scope of the present invention is not subject to the restriction of following public specific embodiment.
Fig. 1 shows the structural representation of the testing circuit of refrigerator fan motor stall according to an embodiment of the invention.
As shown in Figure 1, the testing circuit 100 of refrigerator fan motor stall according to an embodiment of the invention, comprise: current detection circuit 102, the input end of described current detection circuit 102 is connected to the driving circuit of the motor of described fan of refrigerator, detects by the electric current in the motor-drive circuit of described fan of refrigerator; Amplifying circuit 104, the input end of described amplifying circuit 104 is connected to the output terminal of described current detection circuit 102, and the first voltage signal that described current detection circuit 102 is exported amplifies processing, to export the second voltage signal after amplification; Control circuit 106, is connected to described amplifying circuit 104, receives the second voltage signal that described amplifying circuit 104 is exported, and judges according to the variation of described second voltage signal whether the motor of described fan of refrigerator stall occurs.
The testing circuit of refrigerator fan motor stall according to an embodiment of the invention, detect the electric current that flows through fan electromotor by current detection circuit, by the output voltage of amplifying circuit amplified current testing circuit, thereby by judging that the variation of voltage judges whether the motor of fan of refrigerator stall occurs.
According to one embodiment of present invention, described current detection circuit 102 comprises: current sense resistor, one end of described current sense resistor is connected to the input end of described motor and described amplifying circuit, the other end ground connection of described current sense resistor.
The testing circuit of refrigerator fan motor stall according to an embodiment of the invention, can adopt current sense resistor to detect the electric current in motor, thereby according to the electric current in motor, the state of motor be judged.
According to one embodiment of present invention, also comprise: described amplifying circuit 104 comprises: the first resistance, the second resistance and operational amplifier, the positive input terminal of described operational amplifier is connected to the output terminal of described current detection circuit, described the first resistance and described the second resistance are connected in series between the output terminal and ground of described operational amplifier, and the negative input end of described operational amplifier is connected to the common port of described the first resistance and described the second resistance.
The testing circuit of refrigerator fan motor stall according to an embodiment of the invention, amplifying circuit is made up of operational amplifier, the first resistance and the second resistance, wherein, the first resistance and the second resistance have determined the enlargement factor of amplifying circuit, can realize the different enlargement factor of employing by adjusting the resistance size of the first resistance and the second resistance.
According to one embodiment of present invention, also comprise: current-limiting resistance, be connected between the output terminal of described current detection circuit and the input end of described amplifying circuit, restriction enters the electric current of described amplifying circuit.
The testing circuit of refrigerator fan motor stall according to an embodiment of the invention, between current detection circuit and amplifying circuit, is also connected with current-limiting resistance, thereby when the electric current in motor increases suddenly, amplifying circuit is played to certain protective effect.
According to one embodiment of present invention, also comprise: impedance matching resistance, is connected between the output terminal and described control circuit of described amplifying circuit, to mate the impedance of described amplifying circuit and described control circuit.
The testing circuit of refrigerator fan motor stall according to an embodiment of the invention, between amplifying circuit and control circuit, is connected with impedance matching resistance, thereby the voltage of amplifying circuit output can be matched with control circuit.
Fig. 2 shows the structural representation of refrigerator according to an embodiment of the invention.
As shown in Figure 2, refrigerator according to an embodiment of the invention, comprising: the testing circuit 100 of the refrigerator fan motor stall in technique scheme described in any one; Warning circuit 202, is connected to the control circuit 106 in the testing circuit of described refrigerator fan motor stall, and in the time that described control circuit judges described motor generation stall, the alarm command sending according to the described control circuit receiving carries out alarm.
Refrigerator according to an embodiment of the invention, comprises and like this, in the time of motor generation stall, can carry out testing circuit and the warning circuit of the refrigerator fan motor stall in technique scheme alarm, thereby avoid refrigerator extremely to freeze.
According to one embodiment of present invention, also comprise: display circuit 204, be connected to described control circuit 106, in the time that described control circuit 106 judges described motor generation stall, the fault reveal codes of the motor rotation blockage sending according to the described control circuit receiving shows.
Refrigerator according to an embodiment of the invention, except carrying out alarm, can also show failure code, thereby facilitates user to know the concrete fault of refrigerator, to take the corresponding operation of processing.
According to one embodiment of present invention, also comprise: defrosting circuit 206, be connected to described control circuit 106, in the time that described control circuit 106 judges described motor generation stall, defrost operation is carried out in the defrosting order sending according to the described control circuit 106 receiving.
Refrigerator according to an embodiment of the invention, the electric fan blower fan stall of refrigerator, very large probability is because there is ice to block the blade of fan electromotor, so by defrost possibility head it off, now refrigerator is forced defrost operation, and defrost exits temperature, spends than original rising 10, ensure defrost time long enough, and waste heat can melt blower fan place freeze.When implementing after as above control, can also timing detection failure whether recover, as voltage recovers normal range, illustrate that stall problem is solved.
Fig. 3 is the schematic flow diagram of the control method of refrigerator according to an embodiment of the invention.
As shown in Figure 3, the control method of the refrigerator of embodiments of the invention, wherein, described refrigerator comprises the testing circuit of refrigerator fan motor stall, display circuit, warning circuit and defrosting circuit, described testing circuit comprises current detection circuit, amplified current and control circuit, the control method of described refrigerator, comprise: step 302, described current detection circuit detects the electric current in the but driving circuit of the motor that flows through described fan of refrigerator; Step 304, the first voltage signal of described current detection circuit output is amplified processing by described amplifying circuit, to export the second voltage signal after amplification; Step 306, described control circuit receives the second voltage signal of described amplifying circuit output, and judges according to the variation of described second voltage signal whether the motor of described fan of refrigerator stall occurs.
The control method of refrigerator according to an embodiment of the invention, detect the electric current that flows through fan electromotor by current detection circuit, by the output voltage of amplifying circuit amplified current testing circuit, thereby by judging that the variation of voltage judges whether the motor of fan of refrigerator stall occurs.
According to one embodiment of present invention, the described variation according to described second voltage signal judges that whether the motor of described fan of refrigerator stall occurs, and specifically comprises: judge that whether moment reduces after increasing described second voltage signal; Judge described second voltage signal moment while reducing after increasing double, judge described motor generation stall.
The control method of refrigerator according to an embodiment of the invention, change and judge whether motor stall occurs according to voltage signal, be specially judge voltage signal whether moment reduce after increasing, if double or repeated detection, to this this variation, judges motor generation stall.
According to one embodiment of present invention, also comprise: in the time that described control circuit judges described motor generation stall, the alarm command that described warning circuit sends according to the described control circuit receiving carries out alarm.
The control method of refrigerator according to an embodiment of the invention, in the time of motor generation stall, can carry out alarm, thereby avoid refrigerator extremely to freeze.
According to one embodiment of present invention, also comprise: in the time that described control circuit judges described motor generation stall, the fault reveal codes of the motor rotation blockage that described display circuit sends according to the described control circuit receiving shows.
The control method of refrigerator according to an embodiment of the invention, except carrying out alarm, can also show failure code, thereby facilitates user to know the concrete fault of refrigerator, to take the corresponding operation of processing.
According to one embodiment of present invention, also comprise: in the time that described control circuit judges described motor generation stall, defrost operation is carried out in the defrosting order that described defrosting circuit sends according to the described control circuit receiving.
The control method of refrigerator according to an embodiment of the invention, the electric fan blower fan stall of refrigerator, very large probability is because there is ice to block the blade of fan electromotor, so by defrost possibility head it off, now refrigerator is forced defrost operation, and defrost exits temperature, spends than original rising 10, ensure defrost time long enough, and waste heat can melt blower fan place freeze.When implementing after as above control, can also timing detection failure whether recover, as voltage recovers normal range, illustrate that stall problem is solved.
Describe technical scheme of the present invention in detail below in conjunction with Fig. 4 and Fig. 5.
Fig. 4 shows the circuit diagram of the testing circuit of refrigerator fan motor stall according to an embodiment of the invention.
As shown in Figure 4, resistance R 05 is current sense resistor, selects 10 Ω/2W.In the time that fan electromotor is normally worked, Ifan is fan input current; When fan motor rotational speed is abnormal or when stall, Ifan can increase 2～4 times.The present invention program's operational amplifier IC01 selects the HA1630D04T with high-speed transitions precision, and the enlargement factor computing method of operational amplification circuit are as follows:
Vout/Vin＝(R07+R08)/R07
It is 5 (scope is 4～10 times) that the present invention program adopts the enlargement factor of amplifying circuit, the R08=4*R07 calculating thus, and it is 2.5K that this programme selects R07 resistance, R08 is 10K, precision 1%.
This magnitude of voltage outputs to control circuit MCU after amplifying by operational amplifier IC01, control circuit is determined corresponding loaded work piece by detecting the variation of this magnitude of voltage, if force defrosting control or warning after abnormal feedback signal being detected, thereby avoid occurring that refrigeration for refrigerator is abnormal.
For guaranteeing effective operation of blower fan, in the time selecting to detect resistance, general R05 choosing value is less, as shown in Figure 4, and taking 10 Europe as example.
In the time that blower fan effectively moves, blower fan terminal voltage accounts for 11V, R05 terminal voltage 1.02V left and right.In the time of blower fan generation stall, because immediate current increases approximately 1 times, so R05 can produce the instantaneous voltage of 2.85V left and right, R05 voltage weakens subsequently, about 0.08V.According to above characteristic, the feature of combined circuit, can be used as the feature of judging motor abnormality stall.When practical application, faint because of voltage, use amplifying circuit, checks the magnitude of voltage after R105 amplifies by control circuit, according to change procedure described above, whether stall of judgement fan electromotor.
Describe the deterministic process of fan electromotor stall below in detail, and processing procedure in the time of motor rotation blockage.
Fig. 5 shows the idiographic flow schematic diagram of the control method of refrigerator according to an embodiment of the invention.
As shown in Figure 5, the idiographic flow of the control method of refrigerator according to an embodiment of the invention is:
Step 502, the output voltage V out after control circuit amplifies current sampling resistor end continues sampling.
Step 504, judge output voltage V out whether moment increase, then reduce suddenly,, enter step 506, otherwise return to step 502 when being in judged result.
Step 506, at output voltage V out, whether moment increases, and when situation about then reducing suddenly occurs 2 times continuously, judges motor generation stall.
Step 508, prompting motor rotation blockage, sends abnormal alarm prompting, shows the failure code of this fault simultaneously.
Step 510, forces to disconnect blower fan output and controls, and refrigerator generation blower fan stall is many cannot be moved because freezing, and carry out and force defrost program, and defrost temperature increases by 10 degree than conventional defrost.
Step 512, the operation of control circuit control fan electromotor, synchronously detects feedback voltage.
Step 514, detects change in voltage trend again, judges whether stall, when being, enters step 516 in judged result, otherwise, return to step 508.
Step 516, returns to conventional control.Conventional control is that refrigerator is normally controlled.
More than be described with reference to the accompanying drawings technical scheme of the present invention, can detect the current signal of fan electromotor, if the abnormal stall of fan electromotor, the control circuit of refrigerator is forced defrosting control or warning after abnormal feedback signal being detected, thereby avoid occurring that refrigeration for refrigerator is abnormal, cause unnecessary customer complaint.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (13)
1. a testing circuit for refrigerator fan motor stall, is characterized in that, comprising:
Current detection circuit, the input end of described current detection circuit is connected to the driving circuit of described refrigerator fan motor, detects by the electric current in refrigerator fan motor driving circuit;
Amplifying circuit, the input end of described amplifying circuit is connected to the output terminal of described current detection circuit, the first voltage signal of described current detection circuit output is amplified to processing, to export the second voltage signal after amplification;
Control circuit, is connected to described amplifying circuit, receives the second voltage signal of described amplifying circuit output, and judges according to the variation of described second voltage signal whether the motor of described fan of refrigerator stall occurs.
2. the testing circuit of refrigerator fan motor stall according to claim 1, is characterized in that, described current detection circuit comprises:
Current sense resistor, one end of described current sense resistor is connected to the input end of described motor and described amplifying circuit, the other end ground connection of described current sense resistor.
3. the testing circuit of refrigerator fan motor stall according to claim 1, is characterized in that,
Described amplifying circuit comprises: the first resistance, the second resistance and operational amplifier, the positive input terminal of described operational amplifier is connected to the output terminal of described current detection circuit, described the first resistance and described the second resistance are connected in series between the output terminal and ground of described operational amplifier, and the negative input end of described operational amplifier is connected to the common port of described the first resistance and described the second resistance.
4. the testing circuit of refrigerator fan motor stall according to claim 1, is characterized in that, also comprises:
Current-limiting resistance, is connected between the output terminal of described current detection circuit and the input end of described amplifying circuit, and restriction enters the electric current of described amplifying circuit.
5. according to the testing circuit of the refrigerator fan motor stall described in any one in claim 1 to 4, it is characterized in that, also comprise:
Impedance matching resistance, is connected between the output terminal and described control circuit of described amplifying circuit, to mate the impedance of described amplifying circuit and described control circuit.
6. a refrigerator, is characterized in that, comprising:
The testing circuit of the refrigerator fan motor stall as described in any one in claim 1 to 5;
Warning circuit, is connected to the control circuit in the testing circuit of described refrigerator fan motor stall, and in the time that described control circuit judges described motor generation stall, the alarm command sending according to the described control circuit receiving carries out alarm.
7. refrigerator according to claim 6, is characterized in that, also comprises:
Display circuit, is connected to described control circuit, and in the time that described control circuit judges described motor generation stall, the fault reveal codes of the motor rotation blockage sending according to the described control circuit receiving shows.
8. according to the refrigerator described in claim 6 or 7, it is characterized in that, also comprise:
Defrosting circuit, is connected to described control circuit, and in the time that described control circuit judges described motor generation stall, defrost operation is carried out in the defrosting order sending according to the described control circuit receiving.
9. a control method for refrigerator, described refrigerator comprises the testing circuit of refrigerator fan motor stall, display circuit, warning circuit and defrosting circuit, described testing circuit comprises current detection circuit, amplified current and control circuit, it is characterized in that, comprising:
Described current detection circuit detects the electric current in the motor of described fan of refrigerator;
The first voltage signal of described current detection circuit output is amplified processing by described amplifying circuit, to export the second voltage signal after amplification;
Described control circuit receives the second voltage signal of described amplifying circuit output, and judges according to the variation of described second voltage signal whether the motor of described fan of refrigerator stall occurs.
10. the control method of refrigerator according to claim 9, is characterized in that, the described variation according to described second voltage signal judges that whether the motor of described fan of refrigerator stall occurs, and specifically comprises:
Judge that whether moment reduces after increasing described second voltage signal;
Judge described second voltage signal moment while reducing after increasing double, judge described motor generation stall.
11. according to the control method of the refrigerator described in claim 9 or 10, it is characterized in that, also comprises:
In the time that described control circuit judges described motor generation stall, the alarm command that described warning circuit sends according to the described control circuit receiving carries out alarm.
12. according to the control method of the refrigerator described in claim 9 or 10, it is characterized in that, also comprises:
In the time that described control circuit judges described motor generation stall, the fault reveal codes of the motor rotation blockage that described display circuit sends according to the described control circuit receiving shows.
13. according to the control method of the refrigerator described in claim 9 or 10, it is characterized in that, also comprises:
In the time that described control circuit judges described motor generation stall, defrost operation is carried out in the defrosting order that described defrosting circuit sends according to the described control circuit receiving.
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| CN201410387472.7A CN104155607B (en) | 2014-08-07 | 2014-08-07 | The detection circuit of refrigerator fan motor stall, refrigerator and its control method |
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| CN201410387472.7A CN104155607B (en) | 2014-08-07 | 2014-08-07 | The detection circuit of refrigerator fan motor stall, refrigerator and its control method |
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| CN104155607B CN104155607B (en) | 2017-03-29 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106124983A (en) * | 2016-06-13 | 2016-11-16 | 宁波强生电机有限公司 | Be hampered testing circuit and the detection method that is hampered |
| CN108078499A (en) * | 2017-12-05 | 2018-05-29 | 北京奇虎科技有限公司 | The stall detection method of robot and brush device, electronic equipment |
| CN109139528A (en) * | 2018-09-25 | 2019-01-04 | 东莞市觅智实业有限公司 | A kind of fan detection system and detection method |
| CN109709484A (en) * | 2019-01-26 | 2019-05-03 | 西安慧晶智能科技有限公司 | A kind of brush direct current motor rotation-blocking up detection device and method |
| CN109917288A (en) * | 2019-04-01 | 2019-06-21 | 常州市康迪克至精电机有限公司 | A kind of detection method of motor rotation blockage |
| CN110091691A (en) * | 2019-04-22 | 2019-08-06 | 深圳创维空调科技有限公司 | A kind of blower ice-melt control method, system and the air conditioner of air conditioner |
| CN110595137A (en) * | 2019-09-30 | 2019-12-20 | 合肥华凌股份有限公司 | Refrigeration equipment and method and device for identifying fan locked rotor |
| CN110768058A (en) * | 2018-07-27 | 2020-02-07 | 蔚来汽车有限公司 | Vehicle charging port arrangement, vehicle and method for controlling a vehicle charging port arrangement |
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| CN106124983A (en) * | 2016-06-13 | 2016-11-16 | 宁波强生电机有限公司 | Be hampered testing circuit and the detection method that is hampered |
| CN108078499A (en) * | 2017-12-05 | 2018-05-29 | 北京奇虎科技有限公司 | The stall detection method of robot and brush device, electronic equipment |
| CN110768058A (en) * | 2018-07-27 | 2020-02-07 | 蔚来汽车有限公司 | Vehicle charging port arrangement, vehicle and method for controlling a vehicle charging port arrangement |
| CN109139528A (en) * | 2018-09-25 | 2019-01-04 | 东莞市觅智实业有限公司 | A kind of fan detection system and detection method |
| CN109139528B (en) * | 2018-09-25 | 2024-03-22 | 东莞市觅智智能家居有限公司 | Fan detection system and detection method |
| CN109709484A (en) * | 2019-01-26 | 2019-05-03 | 西安慧晶智能科技有限公司 | A kind of brush direct current motor rotation-blocking up detection device and method |
| CN109917288A (en) * | 2019-04-01 | 2019-06-21 | 常州市康迪克至精电机有限公司 | A kind of detection method of motor rotation blockage |
| CN110091691A (en) * | 2019-04-22 | 2019-08-06 | 深圳创维空调科技有限公司 | A kind of blower ice-melt control method, system and the air conditioner of air conditioner |
| CN110091691B (en) * | 2019-04-22 | 2021-09-28 | 深圳创维空调科技有限公司 | Fan ice melting control method and system of air conditioner and air conditioner |
| CN110595137A (en) * | 2019-09-30 | 2019-12-20 | 合肥华凌股份有限公司 | Refrigeration equipment and method and device for identifying fan locked rotor |
| CN110595137B (en) * | 2019-09-30 | 2021-07-23 | 合肥华凌股份有限公司 | Refrigeration equipment and method and device for identifying fan locked rotor |
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