CN110120652A - A kind of method, system and air conditioner for preventing power down from accidentally protecting - Google Patents
A kind of method, system and air conditioner for preventing power down from accidentally protecting Download PDFInfo
- Publication number
- CN110120652A CN110120652A CN201910461181.0A CN201910461181A CN110120652A CN 110120652 A CN110120652 A CN 110120652A CN 201910461181 A CN201910461181 A CN 201910461181A CN 110120652 A CN110120652 A CN 110120652A
- Authority
- CN
- China
- Prior art keywords
- air conditioner
- main control
- control chip
- voltage
- threshold value
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16576—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing DC or AC voltage with one threshold
-
- 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)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The present invention provides a kind of method, system and air conditioner for preventing power down from accidentally protecting, the above-mentioned method for preventing power down from accidentally protecting is for air conditioner, comprising the following steps: step S1 samples the DC voltage of main control chip input port；Step S2, the voltage value obtained to sampling are compared with certain threshold value, when the voltage value of sampling is less than or equal to threshold value, then judge that off-position occurs in air conditioner.The present invention, which can solve to power on immediately after exchange input powers off, causes control program to enter the problem of accidentally protecting.
Description
Technical field
The present invention relates to air-conditioning technical fields, in particular to a kind of method, system and sky for preventing power down from accidentally protecting
Adjust device.
Background technique
With the development and the improvement of people's living standards of society, air conditioner, especially transducer air conditioning are in family, enterprise
The occasions such as industry are widely used.The outer machine controller program of existing transducer air conditioning does not have the anti-error protection function of detection of power loss
Energy.After air-conditioning disconnects 220V alternating current input power supplying, since DC energy storage electrolytic capacitor also has a part of electric energy, main control chip is still
It will continue to work.But at this point, detected load causes to export without correct signal and gives master control core due to can not work normally
Piece.Main control chip can report relevant failure to remind at this time.If immediately accessing 220V power supply at this time, main control chip is still in failure shape
State will not exit at once, cause air-conditioning to report failure by mistake, bring puzzlement to user, influence user experience.
Summary of the invention
The technical problem to be solved by the present invention is to provide a kind of method, system and air conditioners for preventing power down from accidentally protecting, and utilize
Detection circuit and control program power on caused air conditioner wrong report failure after preventing exchange input power-off immediately.
To solve the above problems, the present invention adopts the following technical scheme:
According to an aspect of the invention, there is provided a kind of method for preventing power down from accidentally protecting for air conditioner, including
Following steps:
Step S1 samples the DC voltage of main control chip input port；
Step S2, the voltage value obtained to sampling are compared with certain threshold value, when the voltage value of sampling is less than or equal to threshold
When value, then judge that off-position occurs in air conditioner.
By the above method, main control chip can recognize that the off-position of air conditioner, and air conditioner will not be protected not open accidentally
Machine not will cause user and judge complaint by accident.
In certain embodiments of the present invention, when the voltage value of continuous n times sampling is greater than the threshold value or when fixed
Between when the voltage value of multiple repairing weld is all larger than the threshold value in cycle T, main control chip entering signal detects program, while repeating to walk
Rapid S1-S2；Wherein, N is the natural number more than or equal to 1.
In certain embodiments of the present invention, when sampled voltage is less than or equal to threshold value, air conditioner does not enter fault mode
State or air conditioner enter brownout fault mode, prompt input voltage too low, fail to open.
Air conditioner does not enter fault mode state, is directly entered normal operation, and thus air conditioner will not be delayed and wait failure
Eliminate, not will use family be mistakenly considered air conditioner refrigeration or heating effect it is poor；It is main when air conditioner enters brownout fault mode
Failure will not be transmitted to interior machine by control chip, show fault code on the display panel, avoided user and be mistaken for air conditioner appearance
Failure.
In certain embodiments of the present invention, when prompt input voltage is too low, the mode used is text, light or sound
Sound.By the method for this prompting, when there is outage condition, family, which can be used, will be apparent that legibly learning this situation.
According to another aspect of the present invention, a kind of system for preventing power down from accidentally protecting for air conditioner is additionally provided,
Include:
Main control chip；
Sampling module is sampled for the DC voltage to main control chip input port；
Judgment module, the voltage value for obtaining to sampling is compared with certain threshold value, and comparison result is transferred to
Main control chip；
When main control chip detects that voltage value is less than or equal to threshold value, then judge that off-position occurs in air conditioner.
In certain embodiments of the present invention, when main control chip detects that voltage value is greater than threshold value, main control chip enters
Signal detection program, while main control chip control sampling module carries out the sampling of next round.
In certain embodiments of the present invention, when main control chip detects that voltage value is less than or equal to threshold value, air conditioner is not
Enter brownout fault mode into fault mode state or air conditioner, prompts input voltage too low, fail to open.
In certain embodiments of the present invention, for the system for preventing power down from accidentally protecting of air conditioner further include:
Cue module is connect with main control chip, when detecting the voltage lower than threshold values, is mentioned by cue module
Show.
In certain embodiments of the present invention, cue module is display board, indicator light or alarm.
Power down is prevented for air conditioner in the above-mentioned system for preventing power down from accidentally protecting and the present invention for air conditioner
Accidentally the method for protection is compared, and possessed beneficial effect is identical, and details are not described herein.
In certain embodiments of the present invention, DC voltage is the output of bleeder circuit in the control circuit of air conditioner external
Voltage, bleeder circuit include concatenated first resistor and second resistance and the capacitor in parallel with second resistance, and first resistor connects
Connect the direct current positive terminal of the rectifier bridge in control circuit.
The present invention directly borrows existing hardware circuit, additional cost is not necessarily to, as long as upgrade procedure, modification of program side
Just, logic is simple, strong robustness.
According to another aspect of the present invention, a kind of air conditioner is additionally provided, including prevents power down from accidentally protecting as described above
The system of shield.Compared with the above-mentioned system for preventing power down from accidentally protecting, possessed beneficial effect is identical, and details are not described herein.
Detailed description of the invention
Fig. 1 is the flow chart of the method for preventing power down from accidentally protecting of the embodiment of the present invention.
Fig. 2 is the structural schematic diagram of the system for preventing power down from accidentally protecting of the embodiment of the present invention.
Fig. 3 is the detection circuit schematic diagram of the anti-error protection of detection of power loss of the embodiment of the present invention.
Description of symbols:
1- main control chip；2- sampling module；3- judgment module；4- cue module.
Specific embodiment
For existing air conditioner, after 220V alternating current input power supplying disconnects, the direct current energy of electrolytic capacitor storage maintains master
Control chip works on, and loads due to power-off cisco unity malfunction, and main control chip is caused not receive correct signal, due to
It is that normal power down or air-conditioning itself break down and cause that main control chip, which cannot be distinguished the reason of not receiving correct signal,
, main control chip will report relevant failure to remind at this time, until the direct current energy of storage is completely consumed, main control chip also without
When method works, this failure is reminded also with disappearance, that is to say, that fault mode can be entered when air-conditioning power down is not completed, and
Malfunction needs lasting three minutes or more not to be switched on.
But if the stage of completing does not re-power in air-conditioning power down, main control chip is still nonserviceabled, it will not be at once
Exit, at this point, partial fault can be sent to interior machine, show fault code on the display panel, user be easy will it is this normally on
Electricity is judged as that air-conditioning itself there are failure, causes to judge by accident.This erroneous judgement is prevalent in the use process of air conditioner, for example,
It turns back on after normal power down, powered on immediately after the unstable caused power-off of air conditioner surrounding voltages, attaching plug loosening causes
Power-off after power on immediately.
In view of this, the present invention provides a kind of method, system and air conditioners for preventing power down from accidentally protecting.
To make the above purposes, features and advantages of the invention more obvious and understandable, with reference to the accompanying drawing to the present invention
Specific embodiment be described in detail.
In a specific embodiment of the present invention, a kind of method for preventing power down from accidentally protecting, as shown in Fig. 1, this hair are provided
The bright execution process for preventing power down from accidentally protecting is as follows:
Step S1 samples the DC voltage of main control chip input port.In the operation circuit of air conditioner, alternating current
Source becomes direct current after over commutation, and Partial DC voltage supplies main control chip, can be to the voltage of the input terminal of main control chip
Value is sampled, according to this as judging that air conditioner belongs to power down and the data foundation of operation troubles still occur.
Step S2, the voltage value obtained to sampling are compared with certain threshold value, if the voltage value of sampling is less than or equal to
When threshold value, then judge that air conditioner belongs to power-off rather than operation troubles occurs；If the voltage value of sampling is greater than threshold value, master control core
Piece entering signal detects program；Repeat step S1-S2.
In fact, for main control chip, when entering signal detects program, is described as follows: when the sampling of continuous n times
Voltage value is greater than the threshold value or when the voltage value of multiple repairing weld is all larger than the threshold value in fixed time period T, master control
Chip entering signal detects program；Wherein, N is the natural number more than or equal to 1.
By the above method, main control chip can recognize that the off-position of air conditioner, and air conditioner will not be protected not open accidentally
Machine not will cause user and judge complaint by accident.
When sampled voltage is less than or equal to threshold value, entering signal does not detect program to main control chip, and air conditioner does not enter failure
Mode state, that is to say, that air conditioner crosses the malfunction duration, is directly entered normal operation, thus air conditioner will not
Delay waits Failure elimination, not will use that family is mistakenly considered air conditioner refrigeration or heating effect is poor, and existing air conditioner is due to disconnected
When electricity enters fault mode state, nonserviceable lasting period, air conditioner can not be freezed or be heated, and user is mistakenly considered
Air conditioner refrigeration or heating effect difference are even mistakenly considered air conditioner and break down.
Alternatively, air conditioner only enters brownout fault mode, reminds user's input voltage too low, fail to open.In this way
Failure will not be transmitted to interior machine by main control chip, show fault code on the display panel, it is because power-off is made that air conditioner, which is not run,
At, rather than air conditioner itself does not freeze or does not heat caused by breaking down, and avoids user and be mistaken for air conditioner
Existing failure.
As specific embodiment, the mode for reminding user's input voltage too low can be text, light, sound etc..Than
Such as, printed words such as " brownouts " are shown using interior machine display panel, or (such as yellow using the light that indicator light issues particular color
Color), or made a sound using alarm (such as " ticking ... ", " too ... ").Wherein, indicator light can be by air-conditioning
Existing trouble light carries out prompting user in device.
By the method for above-mentioned this prompting, when there is outage condition, family, which can be used, will be apparent that legibly learning this
One situation.
When sampled voltage is greater than threshold value, main control chip entering signal is needed to detect program, because there are two kinds of situations, one
It is that air-conditioning operates normally, second is that air-conditioning breaks down.Sampled voltage indistinguishable air conditioner compared with threshold value is depended merely on to belong to just
Often operation or failure, therefore, it is necessary to main control chip entering signals to detect program, when main control chip does not receive correctly
When signal, main control chip is reminded using trouble light report failure.User can distinguish the power-off of air conditioner, operate normally and go out
Existing these three states of failure.
In embodiments of the present invention, a kind of system for preventing power down from accidentally protecting is additionally provided, as shown in Fig. 2, comprising: main
Control chip 1, sampling module 2 and judgment module 3.
Main control chip 1 is the chip that air conditioner carries, and does not have to additional increase part of appliance, directly upgrades in main control chip
Program, executing program includes the above-mentioned method program for preventing power down from accidentally protecting, and modification of program is convenient, and logic is simple, Shandong
Stick is strong.
Sampling module 2 samples the DC voltage of 1 input port of main control chip, and the input voltage value of acquisition, which is used as, to be sentenced
The data foundation of disconnected air conditioner power down.
3 pairs of judgment module sample obtained voltage value and are compared with certain threshold value, and comparison result is transferred to master control
Chip 1, main control chip 1 are made according to judging result to draw a conclusion: if the voltage value of sampling is less than or equal to threshold value, judging
Air conditioner belongs to power-off rather than operation troubles occurs；If the voltage value of sampling is greater than threshold value, the inspection of 1 entering signal of main control chip
Ranging sequence；Main control chip 1 controls the sampling that sampling module 2 carries out next round.
When detecting the voltage for being less than or equal to setting threshold values, main control chip 1 controls air conditioner and does not enter fault mode shape
State, or brownout fault mode is only entered, it reminds user's input voltage too low, fail to open, will not thus be made to user
Operation is repaired at the bad impression of air-conditioning failure itself, while convenient for guidance engineer after sale.
As specific embodiment, the cue module 4 of reminding user's input voltage too low can for display board, indicator light or
Person's alarm.Cue module 4 is connect with main control chip 1, when detecting the voltage lower than setting threshold values, passes through cue module 4
It reminds to user, it is simple and clear, avoid erroneous judgement.
As shown in figure 3, the detection circuit schematic diagram of the anti-error protection of detection of power loss for the embodiment of the present invention, AC is exchange
Power supply, inductance L1 and capacitor C1 form EMI filter circuit, connect with AC power source；Relay K1 and PTC resistor R3 composition powers on
Charging circuit, the one end PTC resistor R3 are connect with one end of capacitor C1, and relay K1 is connected in parallel with PTC resistor R3；Rectifier bridge
DB2 by AC rectification at direct current, including four ports, two of them port as ac voltage input, respectively with PTC
The other end connection of the other end, capacitor C1 of resistance R3, positive and negative electrode of other two port as direct current, as direct current
Source, wherein cathode ground connection, anode connection Boost voltage lifting PFC (PFC) circuit.
Pfc circuit includes switching tube G1, fast recovery diode D1, electrolytic capacitor C2, C3, C4, resistance R1, R2, capacitor C5
The feed forward circuit of composition.Switching tube G1, electrolytic capacitor C2, C3, C4 are in parallel with above-mentioned DC power supply, fast recovery diode D1
It connects with DC power supply；One end of resistance R1 is connect with the anode of above-mentioned DC power supply, and the other end connects one end of resistance R2,
The other end of resistance R2 is grounded, and is connect after capacitor C5 is in parallel with resistance R2 with MCU control module.
Switching Power Supply removes electricity from pfc circuit output, is converted into low tension supply MCU control module.In MCU control module
With trouble light.
Above-mentioned feed forward circuit is bleeder circuit, is connected to the AD mouth of MCU control module, and bleeder circuit output voltage is given
MCU control module samples mould by AD that is to say, saying input voltage of the output voltage of bleeder circuit as MCU control module
The input voltage of block real-time detection MCU control module, (such as Switching Power Supply when detecting that input voltage is less than or equal to certain threshold values
Under-voltage protecting circuit is set as 50VAC, then sets threshold values as 55V), entering signal does not detect program, and trouble light only shows exchange
The too low failure of input voltage.
The present invention directly borrows existing hardware circuit, additional cost is not necessarily to, as long as upgrade procedure.It can thus solve
Certainly powering on immediately after exchange input power-off causes control program to enter the problem of accidentally protecting, so that air conditioner will not be protected not open accidentally
Machine not will cause user and judge complaint by accident, can also further remove delay from and wait Failure elimination, will not cause air-conditioning to user
The impression of device refrigeration or heating effect difference.
In embodiments of the present invention, a kind of air conditioner is additionally provided comprising the above-mentioned system for preventing power down from accidentally protecting.
Although present disclosure is as above, present invention is not limited to this.Anyone skilled in the art are not departing from this
It in the spirit and scope of invention, can make various changes or modifications, therefore protection scope of the present invention should be with claim institute
Subject to the range of restriction.
Claims (10)
1. a kind of method for preventing power down from accidentally protecting for air conditioner, which comprises the following steps:
Step S1 samples the DC voltage of main control chip input port；
Step S2, the voltage value obtained to sampling are compared with certain threshold value, when the voltage value of sampling is less than or equal to threshold value,
Then judge that off-position occurs in air conditioner.
2. the method according to claim 1, wherein when continuous n times sampling voltage value be greater than the threshold value or
For person when the voltage value of multiple repairing weld is all larger than the threshold value in fixed time period T, main control chip entering signal detects program,
Step S1-S2 is repeated simultaneously；Wherein, N is the natural number more than or equal to 1.
3. the method according to claim 1, wherein when sampled voltage be less than or equal to threshold value when, air conditioner not into
Enter fault mode state or air conditioner enters brownout fault mode, prompts input voltage too low, fail to open.
4. according to the method described in claim 3, it is characterized in that, when prompt input voltage is too low, the mode that uses for text,
Light or sound.
5. a kind of system for preventing power down from accidentally protecting for air conditioner characterized by comprising
Main control chip (1)；
Sampling module (2), for being sampled to the DC voltage of the main control chip (1) input port；
Judgment module (3), the voltage value for obtaining to sampling is compared with certain threshold value, and comparison result is transferred to institute
State main control chip (1)；
When the main control chip (1) detects that the voltage value is less than or equal to threshold value, then judge that off-position occurs in air conditioner.
6. system according to claim 5, which is characterized in that when the main control chip (1) detects that the voltage value is big
When threshold value, main control chip (1) entering signal detects program, while the main control chip (1) controls the sampling module
(2) sampling of next round is carried out.
7. system according to claim 5, which is characterized in that when the main control chip (1) detects that the voltage value is small
When being equal to threshold value, air conditioner does not enter fault mode state or air conditioner enters brownout fault mode, prompts input
Brownout is fail to open.
8. system according to claim 5, which is characterized in that further include:
Cue module (4) is connect with the main control chip (1), when detecting the voltage lower than threshold values, passes through the prompt mould
Block (4) is prompted.
9. system according to claim 5, which is characterized in that the DC voltage is in the control circuit of air conditioner external
The output voltage of bleeder circuit, the bleeder circuit include concatenated first resistor and second resistance and in parallel with second resistance
Capacitor, first resistor is connected to the direct current positive terminal of rectifier bridge in the control circuit.
10. a kind of air conditioner, which is characterized in that including such as claim 5-9 it is described in any item prevent power down accidentally protection be
System.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910461181.0A CN110120652A (en) | 2019-05-30 | 2019-05-30 | A kind of method, system and air conditioner for preventing power down from accidentally protecting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910461181.0A CN110120652A (en) | 2019-05-30 | 2019-05-30 | A kind of method, system and air conditioner for preventing power down from accidentally protecting |
Publications (1)
| Publication Number | Publication Date |
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| CN110120652A true CN110120652A (en) | 2019-08-13 |
Family
ID=67523451
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910461181.0A Pending CN110120652A (en) | 2019-05-30 | 2019-05-30 | A kind of method, system and air conditioner for preventing power down from accidentally protecting |
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Citations (5)
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| CN202351310U (en) * | 2011-11-25 | 2012-07-25 | 四川长虹电器股份有限公司 | Circuit device for detecting alternating current (AC) power failure of liquid crystal display television (LCD TV) |
| CN102890210A (en) * | 2012-09-27 | 2013-01-23 | 青岛海信日立空调系统有限公司 | Fault detection device and method |
| CN104283472A (en) * | 2013-07-03 | 2015-01-14 | 环旭电子股份有限公司 | Voltage regulator and excessively-low-voltage protection circuit thereof |
| CN204615356U (en) * | 2015-05-26 | 2015-09-02 | 广州视源电子科技股份有限公司 | A kind of over under-voltage protection circuit and compressor of air conditioner are energized protective circuit |
| CN105115105A (en) * | 2015-08-28 | 2015-12-02 | 广东美的制冷设备有限公司 | Power failure detection method and system and air conditioner |
-
2019
- 2019-05-30 CN CN201910461181.0A patent/CN110120652A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202351310U (en) * | 2011-11-25 | 2012-07-25 | 四川长虹电器股份有限公司 | Circuit device for detecting alternating current (AC) power failure of liquid crystal display television (LCD TV) |
| CN102890210A (en) * | 2012-09-27 | 2013-01-23 | 青岛海信日立空调系统有限公司 | Fault detection device and method |
| CN104283472A (en) * | 2013-07-03 | 2015-01-14 | 环旭电子股份有限公司 | Voltage regulator and excessively-low-voltage protection circuit thereof |
| CN204615356U (en) * | 2015-05-26 | 2015-09-02 | 广州视源电子科技股份有限公司 | A kind of over under-voltage protection circuit and compressor of air conditioner are energized protective circuit |
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