CN105547604A - Air conditioner, draught fan rotation speed detecting method and device thereof - Google Patents
Air conditioner, draught fan rotation speed detecting method and device thereof Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
Abstract
The invention discloses an air conditioner, a draught fan rotation speed detecting method and device thereof. The draught fan rotation speed detecting method of the air conditioner includes the following steps that: current signals in an air conditioner draught fan power supply line are acquired, so that the sine waves of the current signals can be obtained; amplification processing is performed on the sine waves of the current signals, so that amplified sine waves can be obtained; and the amplified sine waves are transformed into square waves; and the rotation speed of an air conditioner draught fan can be calculated through the square waves. With the draught fan rotation speed detecting method and device of the invention adopted, the problem of incapability of obtaining the rotation speed of the draught fan when signals of the operating of the air conditioner draught fan are too weak can be solved.
Description
Technical field
The present invention relates to field of air conditioning, in particular to a kind of air-conditioning and rotation speed of fan detection method thereof and device.
Background technology
Air-conditioning draught fan is the vitals of air-conditioning, for air-conditioning, often need to detect the rotating speed of air-conditioning draught fan, the blower fan that air-conditioning uses, such as, adjustable speed is without feedback blower fan, program can not obtain the rotating speed of blower fan reality, can only by the program estimation rotation speed of fan preset, therefore there will be the situation that rotation speed of fan that the actual speed of air-conditioning draught fan and program estimate is inconsistent, thus affect air conditioner overall performance.
When air-conditioning draught fan slow running, the signal that air-conditioning draught fan runs is less, because the signal of fan operation is less, it is larger to there is sampling difficulty in existing detection method, or the signal collected is too little can not be applied by subsequent conditioning circuit, error is too large, the problem of air-conditioning draught fan actual speed can not be detected.
For the problem that can not obtain rotation speed of fan when the signal of air-conditioning fan operation is too little in correlation technique, at present effective solution is not yet proposed.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of air-conditioning and rotation speed of fan detection method thereof and device, with solve signal that air-conditioning draught fan runs too little time can not obtain the problem of rotation speed of fan.
To achieve these goals, according to an aspect of the present invention, provide a kind of rotating speed of air conditioner fan detection method, the method comprises: gather the current signal in air-conditioning fan power source line, obtain the sine wave of current signal; The sine wave of current signal is performed and amplifies process, the sine wave after being amplified; Sine wave after amplifying is converted into square wave; And the rotating speed of air-conditioning draught fan is calculated by square wave.
Further, the power lead of air-conditioning draught fan comprises three power leads, three power leads comprise the first power lead, first power cord wrap is on current transformer, gather the current signal in air-conditioning fan power source line, the sine wave obtaining current signal comprises: gather the current signal in the first power lead by current transformer, obtain sine wave.
Further, gathering the current signal in air-conditioning fan power source line, after obtaining the sine wave of current signal, method also comprises: the half cycle of the sine wave of filtering current signal, obtains half cycle sine wave; Perform the sine wave of current signal and amplify process, the sine wave after being amplified comprises: half-and-half all sinusoidal wave execution amplify process, the sine wave after being amplified.
Further, the sine wave after amplification is converted into square wave to comprise: judge whether the amplitude of the sine wave after amplifying is greater than predetermined threshold value; The point that amplitude on sine wave after amplification is greater than predetermined threshold value is converted into the first numerical value; The point that amplitude on sine wave after amplification is not more than predetermined threshold value is converted into second value, and wherein, the first numerical value is greater than second value and the difference of the first numerical value and second value is greater than preset difference value; Connect the first numerical value and point corresponding to second value respectively, obtain square wave.
Further, comprised by the rotating speed of square wave calculating air-conditioning draught fan: the side's of acquisition wave frequency; And by the rotating speed of the frequency computation part air-conditioning draught fan of square wave.
To achieve these goals, according to a further aspect in the invention, provide a kind of rotating speed of air conditioner fan pick-up unit, this device comprises: collecting unit, for gathering the current signal in air-conditioning fan power source line, obtains the sine wave of current signal; Amplifying unit, amplifies process, the sine wave after being amplified for performing the sine wave of current signal; Conversion unit, for being converted into square wave by the sine wave after amplification; And computing unit, for being calculated the rotating speed of air-conditioning draught fan by square wave.
Further, the power lead of air-conditioning draught fan comprises three power leads, and three power leads comprise the first power lead, and the first power cord wrap is on current transformer, and collecting unit is used for the current signal gathered by current transformer in the first power lead, obtains sine wave.
Further, device also comprises: filter unit, for the half cycle of the sine wave of filtering current signal, obtains half cycle sine wave; Amplifying unit also processes for double week sinusoidal wave execution amplification, the sine wave after being amplified.
Further, conversion unit comprises: judge module, for judging whether the amplitude of the sine wave after amplifying is greater than predetermined threshold value; First conversion module, is converted into the first numerical value for some amplitude on the sine wave after amplification being greater than predetermined threshold value; Second conversion module, be converted into second value for some amplitude on the sine wave after amplification being not more than predetermined threshold value, wherein, the first numerical value is greater than second value and the difference of the first numerical value and second value is greater than preset difference value; Link block, for connecting the first numerical value and point corresponding to second value respectively, obtains square wave.
Further, computing unit comprises: acquisition module, for the side's of acquisition wave frequency; Computing module, for the rotating speed of the frequency computation part air-conditioning draught fan by square wave.
To achieve these goals, according to a further aspect in the invention, provide a kind of air-conditioning, this air-conditioning comprises rotating speed of air conditioner fan pick-up unit of the present invention.
The present invention, by gathering the current signal in air-conditioning fan power source line, obtains the sine wave of current signal; The sine wave of current signal is performed and amplifies process, the sine wave after being amplified; Sine wave after amplifying is converted into square wave; And calculate the rotating speed of air-conditioning draught fan by square wave, solve signal that air-conditioning draught fan runs too little time can not obtain the problem of rotation speed of fan, and then reach the signal run at air-conditioning draught fan too little time Obtaining Accurate rotation speed of fan effect.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the process flow diagram of rotating speed of air conditioner fan detection method according to a first embodiment of the present invention;
Fig. 2 is the schematic diagram of the current sinusoidal ripple signal collected according to the current transformer of the embodiment of the present invention;
Fig. 3 is the schematic diagram of the half cycle sine wave according to the embodiment of the present invention;
Fig. 4 is the schematic diagram connected according to the follow circuit partial circuit of the embodiment of the present invention;
Fig. 5 is the schematic diagram connected according to the amplification circuits circuit of the embodiment of the present invention;
Fig. 6 is the schematic diagram of the square wave according to the embodiment of the present invention;
Fig. 7 is the schematic diagram connected according to the comparator circuit partial circuit of the embodiment of the present invention;
Fig. 8 is the schematic diagram connected according to the rotating speed of air conditioner fan testing circuit of the embodiment of the present invention;
Fig. 9 is the process flow diagram of rotating speed of air conditioner fan detection method according to a second embodiment of the present invention; And
Figure 10 is the schematic diagram of the rotating speed of air conditioner fan pick-up unit according to the embodiment of the present invention.
Embodiment
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
The application's scheme is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present application, technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment is only the embodiment of the application's part, instead of whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all should belong to the scope of the application's protection.
It should be noted that, term " first ", " second " etc. in the instructions of the application and claims and above-mentioned accompanying drawing are for distinguishing similar object, and need not be used for describing specific order or precedence.Should be appreciated that the data used like this can be exchanged, in the appropriate case so that the embodiment of the application described herein.In addition, term " comprises " and " having " and their any distortion, intention is to cover not exclusive comprising, such as, contain those steps or unit that the process of series of steps or unit, method, system, product or equipment is not necessarily limited to clearly list, but can comprise clearly do not list or for intrinsic other step of these processes, method, product or equipment or unit.
Embodiments provide a kind of rotating speed of air conditioner fan detection method.
Fig. 1 is the process flow diagram of rotating speed of air conditioner fan detection method according to a first embodiment of the present invention, and as shown in Figure 1, the method comprises the following steps:
Step S102: gather the current signal in air-conditioning fan power source line, obtain the sine wave of current signal.
The adjustable speed that current air conditioner uses is usually disposed in the outdoor without the blower fan of feedback blower fan, also cry air-conditioning outer blower fan, the power lead of the motor of the outer blower fan of air-conditioning has three, is respectively U, V, W power lead, three power leads comprise the first power lead, and the first power cord wrap, on current transformer, gathers the current signal in air-conditioning fan power source line, the sine wave obtaining current signal can gather the current signal in the first power lead by current transformer, obtain sine wave.By three power lead U, V, one in W is wound around predetermined amount on current transformer, amplifying circuit is had to amplify current signal due to follow-up, therefore being wound around the number of turns need not be a lot, and be such as wound around two circles, current transformer collection is by current signal wherein, obtain the sine wave of current signal, the schematic diagram of the sine wave of the current signal obtained as shown in Figure 2.
Step S104: the sine wave of current signal is performed and amplifies process, the sine wave after being amplified.
Gathering the current signal in air-conditioning fan power source line, after obtaining the sine wave of current signal, preferably, the half cycle of the sine wave of filtering current signal, obtains half cycle sine wave; Perform the sine wave of current signal and amplify process, the sine wave after being amplified can be: half-and-half all sinusoidal wave execution amplify process, the sine wave after being amplified.
Conveniently collected sine wave signal is processed, make waveform more stable, after obtaining sine wave, by signal follower, obtained current waveform is followed, the half cycle that removing is sinusoidal wave, alternatively, by the negative half period that follower removing is sinusoidal wave, the schematic diagram of the half cycle sine wave obtained as shown in Figure 3.
Alternatively, during offset of sinusoidal ripple filtering half cycle, used follower and circuit connecting section are divided as shown in Figure 4, R1 and R2 is resistance, U1 is operational amplifier, sine wave signal inputs U1 by in-phase input end, filtered out the negative half period in sine wave by U1, the output terminal output waveform of U1 is the half cycle sine wave only retaining sinusoidal wave positive half cycle.
During due to blower fan slow running, the signal controlling fan operation may be very little, therefore when gathering the current signal in air-conditioning fan power source line, the current signal collected is very little, in order to make signal stabilization, reducing error, utilizing amplifying circuit to mate suitable enlargement factor, half-and-half week sinusoidal wave execution amplifies process, so that small-signal can be applied by subsequent conditioning circuit.Alternatively, amplifying circuit as shown in Figure 5, R3, R4, R5, R6 are resistance, and U2 is operational amplifier, half cycle sine wave inputs from the in-phase input end of U2, in circuit, the resistance value of R5 and R6 is set to R5 ≈ R6, during half cycle sinewave output, enlargement factor is about R6/R4, therefore can be adjusted the enlargement factor of half cycle sine wave by the ratio adjusting R6 and R4.
Step S106: the sine wave after amplifying is converted into square wave.
Sine wave after amplification is converted into square wave can be: judge whether the amplitude of the sine wave after amplifying is greater than predetermined threshold value; The point that amplitude on sine wave after amplification is greater than predetermined threshold value is converted into the first numerical value; The point that amplitude on sine wave after amplification is not more than predetermined threshold value is converted into second value, and wherein, the first numerical value is greater than second value and the difference of the first numerical value and second value is greater than preset difference value; Connect the first numerical value and point corresponding to second value respectively, obtain square wave.
Conveniently data processing is carried out to waveform signal, after half cycle sine wave after being amplified, square wave is translated into by comparer, the schematic diagram of the square wave obtained as shown in Figure 6, comparer judges whether the amplitude of the half cycle sine wave after amplifying is greater than predetermined threshold value, also be the numerical value of the reference voltage of comparer, point amplitude being greater than predetermined threshold value is converted into the first numerical value, point amplitude being not more than predetermined threshold value is converted into second value, also namely change in time presents height two kinds of numerical value, connect the point of two kinds of numerical value, namely obtain square wave.Alternatively, used comparator circuit as shown in Figure 7, in Fig. 7, R7, R8, R9, R10 are resistance, and D1 is diode, U3 is operational amplifier, and the half cycle sine wave after amplification, is carried out, after clamper, being input to the in-phase input end of operational amplifier U3 through D1 by A point after R7 resistance current limliting.B point is the reference point of comparative voltage, and do not change original frequency due to original sine wave is converted into square wave, therefore the reference voltage of B point is enough low, and C point then exports the square wave consistent with sine wave freuqency.
Step S108: the rotating speed being calculated air-conditioning draught fan by square wave.
The rotating speed being calculated air-conditioning draught fan by square wave is comprised: the side's of acquisition wave frequency, by the rotating speed of the frequency computation part air-conditioning draught fan of square wave.
By microprocessor, square wave is processed, according to the corresponding relation between square wave frequency and rotation speed of fan, be converted into preset algorithm, initial current waveform is converted into effective motor speed data, export over the display.Display can be the display of air-conditioning internal machine, also can be other default displays, as the telepilot of air-conditioning, or the mobile phone screen etc. preset.
Such as, obtain motor and turn the time t of three circles, it is 4 pulses that motor often turns around, and therefore when motor gets 12 pulses, namely obtain the time t that motor turns three circles, the time of turning around is t/3, supposes that the unit of t is 0.1ms, namely 10
-4s, the unit of rotating speed is rev/min, then the computing method of rotating speed are: R=60 × 10
4/ (t/3)=1800000/t.
Alternatively, the circuit that the sine wave signal collected processes is connected as shown in Figure 8, current transformer gathers the current signal in air-conditioning fan power source line, obtain the sine wave of current signal, through signal follower, obtained current waveform is followed, the negative half period that removing is sinusoidal wave, then amplifying circuit is entered, half-and-half process is amplified in week sinusoidal wave execution, through comparer, the sine wave after amplification is converted into square wave, counter is used to calculate the frequency of square wave, the rotating speed of air-conditioning draught fan is calculated at the algorithm through presetting, the rotating speed of air-conditioning draught fan exports in display the most at last.
This embodiment, by gathering the current signal in air-conditioning fan power source line, obtains the sine wave of current signal; The sine wave of current signal is performed and amplifies process, the sine wave after being amplified; Sine wave after amplifying is converted into square wave; And calculated the rotating speed of air-conditioning draught fan by square wave, thus the problem of rotation speed of fan can not be obtained when the signal solving air-conditioning draught fan operation is too little.
Fig. 9 is the process flow diagram of rotating speed of air conditioner fan detection method according to a second embodiment of the present invention, and this embodiment can as the preferred implementation of above-mentioned first embodiment, and as shown in Figure 9, this rotating speed of air conditioner fan detection method comprises:
Step S201: collection signal.
Gather the current signal in air-conditioning draught fan, such as, the current signal in air-conditioning draught fan can be gathered by current transformer, in three of air-conditioning draught fan power leads one is wrapped on current transformer, current transformer can collect by current signal wherein, obtains the sine wave of current signal.
Step S202: signal is followed.
Conveniently collected sine wave signal is processed, make waveform more stable, after obtaining sine wave, by signal follower, obtained current waveform is followed, the half cycle that removing is sinusoidal wave, alternatively, by the negative half period that follower removing is sinusoidal wave, half cycle sine wave is obtained.
Step S203: signal amplifies.
Conveniently half-and-half all sine wave signals process, and by operational amplifier, half-and-half week sinusoidal wave execution amplifies process, the sine wave after being amplified.When half-and-half all sine wave signals amplify, according to signal magnitude coupling enlargement factor, such as, value by arranging the resistance in amplifying circuit mates enlargement factor.
Step S204: signal compares.
Conveniently data processing is carried out to waveform signal, after half cycle sine wave after being amplified, square wave is translated into by comparer, reference signal in comparer is set, comparer judges whether the amplitude of the half cycle sine wave after amplifying is greater than predetermined threshold value, also be the referential data of comparer, point amplitude being greater than predetermined threshold value is converted into the first numerical value, point amplitude being not more than predetermined threshold value is converted into second value, also namely change in time presents height two kinds of numerical value, connect the point of two kinds of numerical value, namely obtain square wave.
Step S205: export square wave.
The square wave obtained is exported to integrated circuit (IntegratedCircuit, referred to as IC) counter, counter calculates the rotating speed of air-conditioning draught fan by calculating square-wave pulse number, also namely by the rotating speed of the frequency computation part air-conditioning draught fan of square wave.
Step S206: data processing.
The signal of reception processes by microprocessor by IC, calculate according to preset rules, obtain rotation speed of fan, according to the corresponding relation between square wave frequency and rotation speed of fan, be converted into preset algorithm, initial current waveform is converted into effective motor speed data.
Step S207: export display to.
The motor speed data calculated exported over the display, display can be the display of air-conditioning internal machine, also can be other default displays, as the telepilot of air-conditioning, or the mobile phone screen etc. preset.
This embodiment is by gathering the current signal in air-conditioning fan power source line, obtain the sine wave of current signal, through signal follower, obtained current waveform is followed, the negative half period that removing is sinusoidal wave, then amplifying circuit is entered, half-and-half process is amplified in week sinusoidal wave execution, through comparer, the sine wave after amplification is converted into square wave, counter is used to calculate the frequency of square wave, the rotating speed of air-conditioning draught fan is calculated at the algorithm through presetting, the rotating speed of air-conditioning draught fan exports in display the most at last, thus solve signal that air-conditioning draught fan runs too little time can not obtain the problem of rotation speed of fan.
It should be noted that, can perform in the computer system of such as one group of computer executable instructions in the step shown in the process flow diagram of accompanying drawing, and, although show logical order in flow charts, but in some cases, can be different from the step shown or described by order execution herein.
Embodiments provide a kind of rotating speed of air conditioner fan pick-up unit, this rotating speed of air conditioner fan pick-up unit may be used for the rotating speed of air conditioner fan detection method performing the embodiment of the present invention.
Figure 10 is the schematic diagram of the rotating speed of air conditioner fan pick-up unit according to the embodiment of the present invention.As shown in Figure 10, this device comprises:
Collecting unit 10, for gathering the current signal in air-conditioning fan power source line, obtains the sine wave of described current signal.
Collecting unit 10 can gather the current signal in air-conditioning fan power source line by current transformer, obtain the sine wave of current signal, wherein, three power lead U of air-conditioning draught fan, V, one in W is wound around predetermined amount on current transformer, gathers food and drink 10 and gathers by current signal wherein, obtain the sine wave of current signal.
Amplifying unit 20, amplifies process, the sine wave after being amplified for performing the sine wave of described current signal.
The current signal in air-conditioning fan power source line is gathered at collecting unit 10, after obtaining the sine wave of current signal, preferably, by the half cycle of filter unit except the sine wave of current signal, obtain half cycle sine wave, then amplify process by amplifying unit 20 to half week sinusoidal wave execution, the sine wave after being amplified, facilitates follow-up offset of sinusoidal ripple to process to amplify sine wave.
Conversion unit 30, for being converted into square wave by the sine wave after described amplification.
Conversion unit 30 comprises judge module, first conversion module, second conversion module and link block, judge module is for judging whether the amplitude of the sine wave after amplifying is greater than predetermined threshold value, if be greater than predetermined threshold value, then the point that amplitude on the sine wave after amplification is greater than predetermined threshold value is converted into the first numerical value by the first conversion module, if be not more than predetermined threshold value, then the point that amplitude on the sine wave after amplification is not more than predetermined threshold value is converted into second value by the second conversion module, wherein, first numerical value is greater than second value, in order to subsequent conditioning circuit facilitates offset of sinusoidal wave frequency to add up, the difference of the first numerical value and second value is greater than preset difference value, then the first numerical value and point corresponding to second value is connected respectively by link block, obtain square wave.
Computing unit 40, for calculating the rotating speed of described air-conditioning draught fan by described square wave.
Computing unit 40 comprises acquisition module and computing module, and when calculating the rotating speed of air-conditioning draught fan by square wave, the acquisition module side of acquisition wave frequency, by the rotating speed of computing module by the frequency computation part air-conditioning draught fan of square wave.Preferably, computing unit 40, according to the corresponding relation between square wave frequency and rotation speed of fan, is converted into preset algorithm, and initial current waveform is converted into effective motor speed data, exports over the display.Display can be the display of air-conditioning internal machine, also can be other default displays, as the telepilot of air-conditioning, or the mobile phone screen etc. preset.
This embodiment employing collecting unit 10 gathers the current signal in air-conditioning fan power source line, obtain the sine wave of described current signal, amplifying unit 20 performs the sine wave of described current signal and amplifies process, sine wave after being amplified, sine wave after described amplification is converted into square wave by conversion unit 30, computing unit 40 calculates the rotating speed of described air-conditioning draught fan by described square wave, thus can not obtain the problem of rotation speed of fan when the signal solving air-conditioning draught fan operation is too little.
The embodiment of the present invention additionally provides a kind of air-conditioning, it should be noted that, this air-conditioning comprises the rotating speed of air conditioner fan pick-up unit of the embodiment of the present invention.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, they can be stored and be performed by calculation element in the storage device, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the present invention is not restricted to any specific hardware and software combination.
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 done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. a rotating speed of air conditioner fan detection method, is characterized in that, comprising:
Gather the current signal in air-conditioning fan power source line, obtain the sine wave of described current signal;
The sine wave of described current signal is performed and amplifies process, the sine wave after being amplified;
Sine wave after described amplification is converted into square wave; And
The rotating speed of described air-conditioning draught fan is calculated by described square wave.
2. method according to claim 1, it is characterized in that, the power lead of described air-conditioning draught fan comprises three power leads, described three power leads comprise the first power lead, described first power cord wrap is on current transformer, gather the current signal in described air-conditioning fan power source line, the sine wave obtaining described current signal comprises:
Gather the current signal in described first power lead by described current transformer, obtain described sine wave.
3. method according to claim 1, is characterized in that,
Gathering the current signal in air-conditioning fan power source line, after obtaining the sine wave of described current signal, described method also comprises: the half cycle of the sine wave of current signal described in filtering, obtains half cycle sine wave; And
Perform the sine wave of described current signal and amplify process, the sine wave after being amplified comprises: perform described half cycle sine wave and amplify process, obtain the sine wave after described amplification.
4. method according to claim 1, is characterized in that, the sine wave after described amplification is converted into square wave and comprises:
Judge whether the amplitude of the sine wave after described amplification is greater than predetermined threshold value;
The point that amplitude on sine wave after described amplification is greater than described predetermined threshold value is converted into the first numerical value;
The point that amplitude on sine wave after described amplification is not more than described predetermined threshold value is converted into second value, and wherein, described first numerical value is greater than second value and the difference of described first numerical value and second value is greater than preset difference value; And
Connect described first numerical value and point corresponding to described second value respectively, obtain described square wave.
5. method according to claim 1, is characterized in that, the rotating speed being calculated described air-conditioning draught fan by described square wave is comprised:
Obtain described side's wave frequency; And
By the rotating speed of air-conditioning draught fan described in the frequency computation part of described square wave.
6. a rotating speed of air conditioner fan pick-up unit, is characterized in that, comprising:
Collecting unit, for gathering the current signal in air-conditioning fan power source line, obtains the sine wave of described current signal;
Amplifying unit, amplifies process, the sine wave after being amplified for performing the sine wave of described current signal;
Conversion unit, for being converted into square wave by the sine wave after described amplification; And
Computing unit, for calculating the rotating speed of described air-conditioning draught fan by described square wave.
7. device according to claim 6, it is characterized in that, the power lead of described air-conditioning draught fan comprises three power leads, described three power leads comprise the first power lead, described first power cord wrap is on current transformer, described collecting unit is used for the current signal gathered by described current transformer in described first power lead, obtains described sine wave.
8. device according to claim 6, is characterized in that, described device also comprises:
Filter unit, for the half cycle of the sine wave of current signal described in filtering, obtains half cycle sine wave,
Wherein, described amplifying unit also amplifies process for performing described half cycle sine wave, obtains the sine wave after described amplification.
9. device according to claim 6, is characterized in that, described conversion unit comprises:
Judge module, whether the amplitude for the sine wave after judging described amplification is greater than predetermined threshold value;
First conversion module, is converted into the first numerical value for some amplitude on the sine wave after described amplification being greater than described predetermined threshold value;
Second conversion module, is converted into second value for some amplitude on the sine wave after described amplification being not more than described predetermined threshold value, and wherein, described first numerical value is greater than second value and the difference of described first numerical value and second value is greater than preset difference value; And
Link block, for connecting described first numerical value and point corresponding to described second value respectively, obtains described square wave.
10. device according to claim 6, is characterized in that, described computing unit comprises:
Acquisition module, for obtaining described side's wave frequency; And
Computing module, for the rotating speed of air-conditioning draught fan described in the frequency computation part by described square wave.
11. 1 kinds of air-conditionings, is characterized in that, comprise the rotating speed of air conditioner fan pick-up unit according to any one of claim 6 to 10.
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| CN110966243A (en) * | 2019-11-05 | 2020-04-07 | 珠海格力电器股份有限公司 | Upwind rotating speed detection and soft start control method and system for air conditioner fan |
| CN110988381A (en) * | 2019-12-19 | 2020-04-10 | 东莞市深鹏电子有限公司 | Method and device for detecting rotating speed of direct current motor |
| CN111141926A (en) * | 2019-12-27 | 2020-05-12 | 宁波三星智能电气有限公司 | Method for detecting rotating speed of fan in charging pile |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110966243A (en) * | 2019-11-05 | 2020-04-07 | 珠海格力电器股份有限公司 | Upwind rotating speed detection and soft start control method and system for air conditioner fan |
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| CN110988381A (en) * | 2019-12-19 | 2020-04-10 | 东莞市深鹏电子有限公司 | Method and device for detecting rotating speed of direct current motor |
| CN110988381B (en) * | 2019-12-19 | 2022-03-08 | 东莞市深鹏电子有限公司 | Method and device for detecting rotating speed of direct current motor |
| CN111141926A (en) * | 2019-12-27 | 2020-05-12 | 宁波三星智能电气有限公司 | Method for detecting rotating speed of fan in charging pile |
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