CN110131834A - Power off recognition methods, device and air-conditioning - Google Patents
Power off recognition methods, device and air-conditioning Download PDFInfo
- Publication number
- CN110131834A CN110131834A CN201910419944.5A CN201910419944A CN110131834A CN 110131834 A CN110131834 A CN 110131834A CN 201910419944 A CN201910419944 A CN 201910419944A CN 110131834 A CN110131834 A CN 110131834A
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- Prior art keywords
- voltage
- busbar voltage
- power
- duration
- recognition methods
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/38—Failure diagnosis
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Biomedical Technology (AREA)
- Health & Medical Sciences (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- General Physics & Mathematics (AREA)
- Protection Of Static Devices (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The present invention provides a kind of power-off recognition methods; include the following steps: to detect busbar voltage and controls voltage and compare; duration of the timing busbar voltage lower than control voltage; judge whether the duration is less than preset time and whether busbar voltage is lower than default protection threshold value, identifies whether busbar voltage powers off according to judging result.Power-off recognition methods provided by the invention is compared with prior art; the new control voltage outside bus; and busbar voltage and control voltage are measured in real time, sampled and carries out size comparison; record duration of the busbar voltage lower than control voltage; duration and preset time are compared; and judge whether busbar voltage is lower than default protection threshold value, judge whether busbar voltage powers off according to two above judgment mode.The reason of busbar voltage breaks down is busbar voltage power-off or the too low protection of busbar voltage, the reason of to shield busbar voltage too low protection.
Description
Technical field
The invention belongs to technical field of electric appliances, are to be related to a kind of power-off recognition methods, device and sky more specifically
It adjusts.
Background technique
In convertible frequency air-conditioner unit, to prevent the power device under low-voltage from switching problem easy to damage, it will usually which setting is female
The too low protection of line voltage.Such protection can be in the power device for the moment closing frequency conversion drive plate that busbar voltage is fallen, generally
Microsecond grade or Millisecond response.
In grid cut-off or artificial power-off, busbar voltage falls moment also and will appear the failure；Simultaneously because usually becoming
Frequency mainboard has large bulk capacitance, and Switching Power Supply can still be supported to work several seconds to tens of seconds after grid cut-off, this failure can be shown
It shows and comes and cause to user using upper puzzlement.And most of existing convertible frequency air-conditioner estimates mode using input voltage,
Without input voltage sample circuit, leading portion input voltage can not be effectively detected.
Summary of the invention
The purpose of the present invention is to provide a kind of power-off recognition methods, to solve existing in the prior art not shielding mother
The problem of line voltage too low protection.
To achieve the above object, the technical solution adopted by the present invention is that: a kind of power-off recognition methods is provided, including is walked as follows
Rapid: detection busbar voltage and control voltage simultaneously compare, and busbar voltage described in timing is sentenced lower than the duration of the control voltage
Whether duration of breaking is less than preset time and whether busbar voltage is lower than default protection threshold value, is known according to judging result
Whether other busbar voltage powers off.
Preferably, busbar voltage is compared using comparator and controls the instantaneous value of voltage.
Preferably, if the busbar voltage is greater than the control voltage, the comparator exports low level；If the mother
Line voltage is less than the control voltage, then the comparator exports high level.
Further, if the duration is less than preset time and when the busbar voltage is lower than default protection threshold value,
Then show the too low failure of busbar voltage.
Further, if the duration is less than preset time and when the busbar voltage is higher than default protection threshold value,
It then continues to test the busbar voltage and control voltage and compares.
Further, if the duration is greater than preset time and when the busbar voltage is lower than default protection threshold value,
The then busbar voltage power-off, does not show the too low failure of busbar voltage.
Further, if the duration is greater than preset time and when the busbar voltage is higher than default protection threshold value,
It then continues to test the busbar voltage and control voltage and compares.
Preferably, the voltage waveform when busbar voltage powers normal is steamed bun wave.
Further, the period of the busbar voltage is T, and the preset time is t, T≤t≤2T.
Preferably, the preset time t is T.
Another object of the present invention is to provide a kind of power-off identification devices, comprising:
Sampling module is measured in real time busbar voltage；
Comparison module, connection busbar voltage and control voltage compare busbar voltage and control the size of voltage；
Control module receives the detection signal of sampling module and the comparison result of the sampling comparison module, bus described in timing
Voltage judges whether the duration is less than preset time and busbar voltage is lower than the duration of the control voltage
It is no to protect threshold value lower than default, identify whether busbar voltage powers off according to judging result.
Further, further include display module for showing failure.
Another object of the present invention is to provide a kind of air-conditionings, including above-mentioned power-off identification device.
The beneficial effect of power-off recognition methods provided by the invention is: compared with prior art, the present invention is outside bus
New control voltage, and size comparison, record bus electricity are measured in real time, sample and carried out to busbar voltage and control voltage
It is forced down in the duration of control voltage, duration and preset time is compared, and judge whether busbar voltage is lower than
Default protection threshold value, judges whether busbar voltage powers off according to two above judgment mode.The reason of busbar voltage breaks down
It is busbar voltage power-off or the too low protection of busbar voltage, the reason of to shield busbar voltage too low protection.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without any creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is the flow chart of power-off recognition methods provided in an embodiment of the present invention；
Fig. 2 is busbar voltage provided in an embodiment of the present invention and the schematic diagram for controlling voltage；
Fig. 3 is the structural schematic diagram of power-off identification device provided in an embodiment of the present invention.
Wherein, each attached drawing main mark in figure:
1, comparator；2, sampling module；3, comparison module.
Specific embodiment
In order to which technical problems, technical solutions and advantages to be solved are more clearly understood, tie below
Accompanying drawings and embodiments are closed, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only
To explain the present invention, it is not intended to limit the present invention.
It should be noted that it can be directly another when element is referred to as " being fixed on " or " being set to " another element
On one element or indirectly on another element.When an element is known as " being connected to " another element, it can
To be directly to another element or be indirectly connected on another element.
In the description of the present invention, it is to be understood that, term " center ", " length ", " width ", " thickness ", "upper",
The orientation or position of the instructions such as "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside"
Relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present invention and simplification of the description, without referring to
Show or imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot manage
Solution is limitation of the present invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more,
Unless otherwise specifically defined.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
The interaction relationship of connection or two elements inside two elements.It for the ordinary skill in the art, can be with
The concrete meaning of above-mentioned term in the present invention is understood as the case may be.
Also referring to Fig. 1, Fig. 2 and Fig. 3, now power-off recognition methods provided in an embodiment of the present invention is illustrated.Institute
Power-off recognition methods is stated, includes the following steps: that busbar voltage and control voltage are measured in real time and are compared, record bus electricity
It is forced down in the duration of control voltage, judges the size of duration and preset time, judge busbar voltage and default protection
Threshold value.When specifically judging, judge whether the duration is less than preset time, whether busbar voltage is lower than default protection threshold value, root
It is judged that result identification busbar voltage whether power off.
Power-off recognition methods provided by the invention, compared with prior art, the new control voltage outside bus, and to bus
Voltage and control voltage are measured in real time, sample and carry out size comparison, and record busbar voltage continues lower than control voltage
Duration and preset time are compared by the time, and judge whether busbar voltage is lower than default protection threshold value, according to above
Two judgment modes judge whether busbar voltage powers off.The reason of busbar voltage breaks down is busbar voltage power-off or bus
Brownout protection, the reason of to shield busbar voltage too low protection.
Preferably, a kind of specific implementation also referring to Fig. 1 to Fig. 2, as power-off recognition methods provided by the invention
Mode uses comparator 1 to compare busbar voltage in real time and controls the instantaneous value size of voltage and by comparison result with the side of level
Formula output.The route that the positive and negative anodes of comparator 1 are connect is different, and the level exported also can be on the contrary, in the present embodiment, will compare
The anode access control voltage of device 1, the cathode of comparator 1 access busbar voltage.Therefore, if busbar voltage is greater than control voltage,
Then comparator 1 exports low level, on the contrary then export high level.Certainly, in other embodiments, can also according to the actual situation and need
Other comparison units are selected to replace comparator 1, it can also be by the access way of comparator 1 and first access way pair
It adjusts.
Further, referring to Fig. 1, and busbar voltage is lower than default protection threshold if the duration is less than preset time
When value, i.e., comparator 1 persistently exports high level, then judges that reason powers off for busbar voltage, and show failure.
Further, if the duration is less than preset time, and busbar voltage is higher than default protection threshold value, then continues to examine
It surveys busbar voltage and control voltage and compares, comparator 1 exports low level.
Further, referring to Fig. 1, and busbar voltage is lower than default protection threshold if the duration is greater than preset time
When value, i.e., comparator 1 persistently exports high level, then judges that reason for busbar voltage failure, does not show the too low event of busbar voltage
Barrier.
Further, referring to Fig. 1, and busbar voltage is higher than default protection threshold if the duration is greater than preset time
When value, then continues to test busbar voltage and control voltage and compare the size of the two, comparator 1 persistently exports low level.
Further, referring to Fig. 2, the normal voltage waveform constantly of busbar voltage power supply is steamed bun wave, specifically, input
Power input alternating current, rectifier bridge convert alternating current to the direct current of steamed bun wave.
Further, Fig. 1 and Fig. 2 is please referred to, the period of busbar voltage is T, preset time t, T≤t≤2T, at it
It, can also be according to the value range of the size selection t of the cycle T and control voltage of steamed bun wave in his embodiment.
Preferably, the optimal value of preset time is T
Referring to Fig. 3, the present invention also provides a kind of power-off identification device, power-off identification device includes sampling module 2, to bus electricity
Pressure is measured in real time；
Comparison module 3, connection busbar voltage and control voltage compare busbar voltage and control the size of voltage；
Control module receives the detection signal of sampling module 2 and the comparison result of the sampling comparison module 3, mother described in timing
Line voltage judges whether the duration is less than preset time and busbar voltage lower than the duration of the control voltage
Whether lower than default protection threshold value, identify whether busbar voltage powers off according to judging result.
It further, further include display module, for showing the malfunction coefficient of unit power-off, if judge power-off reason to be defeated
Enter power cut-off and then show failure, judges that powering off reason does not show failure then for busbar voltage protection.
Further, the present invention also provides a kind of air-conditioning, the air-conditioning includes above-mentioned power-off identification device.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (13)
1. a kind of power-off recognition methods, which comprises the steps of:
Detection busbar voltage and control voltage simultaneously compare, and busbar voltage described in timing is lower than the duration of the control voltage,
Judge whether the duration is less than preset time and whether busbar voltage is lower than default protection threshold value, according to judging result
Whether identification busbar voltage powers off.
2. power-off recognition methods as described in claim 1, it is characterised in that:
Using the instantaneous value of the comparator busbar voltage and the control voltage.
3. power-off recognition methods as claimed in claim 2, it is characterised in that:
If the busbar voltage is greater than the control voltage, the comparator exports low level；If the busbar voltage is less than
The control voltage, then the comparator exports high level.
4. power-off recognition methods as described in claim 1, it is characterised in that:
If the duration less than preset time and when the busbar voltage is lower than default protection threshold value, shows the mother
The too low failure of line voltage.
5. power-off recognition methods as described in claim 1, it is characterised in that:
If the duration less than preset time and when the busbar voltage is higher than default protection threshold value, continues to test institute
It states busbar voltage and the control voltage and compares.
6. power-off recognition methods as described in claim 1, it is characterised in that:
If the duration is greater than preset time and the busbar voltage when being lower than the default protection threshold value, the mother
Line voltage power-off, does not show the too low failure of the busbar voltage.
7. power-off recognition methods as described in claim 1, it is characterised in that:
If the duration is greater than the preset time and the busbar voltage when being higher than the default protection threshold value, after
It is continuous to detect the busbar voltage and the control voltage and compare.
8. power-off recognition methods as described in claim 1, it is characterised in that: the voltage wave when busbar voltage powers normal
Shape is steamed bun wave.
9. power-off recognition methods as described in claim 1, it is characterised in that: the period of the busbar voltage is T, described default
Time is t, T≤t≤2T.
10. power-off recognition methods as claimed in claim 9, it is characterised in that: the preset time t is T.
11. a kind of power-off identification device characterized by comprising
Sampling module is measured in real time busbar voltage；
Comparison module, connection busbar voltage and control voltage compare busbar voltage and control the size of voltage；
Control module receives the detection signal of sampling module and the comparison result of the sampling comparison module, bus described in timing
Voltage judges whether the duration is less than preset time and busbar voltage is lower than the duration of the control voltage
It is no to protect threshold value lower than default, identify whether busbar voltage powers off according to judging result.
12. power-off identification device as described in claim 1, which is characterized in that further include the display module for showing failure.
13. a kind of air-conditioning, it is characterised in that: including the power-off identification device as described in any one of claim 11-12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910419944.5A CN110131834B (en) | 2019-05-20 | 2019-05-20 | Power failure identification method and device and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910419944.5A CN110131834B (en) | 2019-05-20 | 2019-05-20 | Power failure identification method and device and air conditioner |
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| Publication Number | Publication Date |
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| CN110131834A true CN110131834A (en) | 2019-08-16 |
| CN110131834B CN110131834B (en) | 2020-08-11 |
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| CN201910419944.5A Active CN110131834B (en) | 2019-05-20 | 2019-05-20 | Power failure identification method and device and air conditioner |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110596518A (en) * | 2019-10-14 | 2019-12-20 | 珠海格力电器股份有限公司 | Fault detection circuit with simplified structure, fault judgment method and air conditioning equipment |
| CN111219351A (en) * | 2020-01-17 | 2020-06-02 | 珠海格力电器股份有限公司 | Fan rotating speed control method and device, air conditioner external unit device and air conditioning equipment |
| CN113125842A (en) * | 2019-12-31 | 2021-07-16 | 北汽福田汽车股份有限公司 | Undervoltage detection method and device, vehicle and electronic equipment |
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| CN111219351B (en) * | 2020-01-17 | 2021-01-12 | 珠海格力电器股份有限公司 | Fan rotating speed control method and device, air conditioner external unit device and air conditioning equipment |
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