CN205051576U - Frequency conversion smoke ventilator - Google Patents
Frequency conversion smoke ventilator Download PDFInfo
- Publication number
- CN205051576U CN205051576U CN201520875257.1U CN201520875257U CN205051576U CN 205051576 U CN205051576 U CN 205051576U CN 201520875257 U CN201520875257 U CN 201520875257U CN 205051576 U CN205051576 U CN 205051576U
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- China
- Prior art keywords
- circuit
- triode
- electric capacity
- frequency
- chip microcomputer
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The utility model discloses a frequency conversion smoke ventilator, including the main control circuit board, the frequency converting circuit board, still include the the low voltage power supply circuit to the main control circuit board and the power supply of frequency converting circuit board, the the low voltage power supply circuit includes bridge type rectifier circuit, a single -chip microcomputer, the programme -controlled reduction voltage circuit of capacitanc, switch circuit, bridge type rectifier circuit is by triode Q1, Q3 and diode D2, D3 constitutes, the programme -controlled reduction voltage circuit of capacitanc includes electric capacity C2, C3, C4 and triode Q4, Q5, switch circuit includes two sets of programme -controlled synchro switch, bridge type rectifier circuit's output is connected to first cluster switch, electric capacity C2 and triode Q4's output is connected to the second cluster switch, two sets of programme -controlled synchro switch are not closed simultaneously. The utility model discloses a bridge type switch structure, the purpose of security isolation power is exported in the realization.
Description
Technical field
The utility model relates to smoke exhaust ventilator technical field, more particularly, relates to a kind of frequency-variable kitchen ventilator.
Background technology
At present, the motor that the smoke exhaust ventilator that people commonly use uses is generally monophase machine, and its running frequency does not change.The control of its rotating speed realizes by regulating the turn ratio of motor internal coil to change voltage, and therefore, the gear of its speed is few, can not stepless speed regulation.In view of this, some producer proposes the scheme of frequency conversion cigarette machine.In the mode of PWM, export variable ratio frequency changer alternating current.By changing the frequency of input asynchronous machine electric current, change the rotating speed of single-phase asynchronous motor.A kind of Chinese utility model patent variable frequency fume exhaust fan disclosed in 28 days February in 2007, by setting up frequency conversion plate, in master control borad, wind speed setting is converted to pwm signal and exports to controller in frequency conversion plate through optical coupling isolation circuit by CPU, and then be the alternating current of voltage regulation and frequency modulation by whole filtered DC inverter, output on motor.For cigarette electrical-mechanical control system, except needs high voltage source, each control board also needs the DC power supply of+15V/+5V.DC power supply is obtained after rectifying and wave-filtering, step-down by civil power usually.Current power circuit needs use safety isolating transformer, while step-down, also can prevent late-class circuit electric shock risk.Transformer belongs to inductive reactive element, and inductive circuit can make that the reactive power of civil power increases, power factor (PF) reduces, and therefore, uses induction reactance electrical equipment can cause huge energy waste to the mains supply of country.
Utility model content
The technical problems to be solved in the utility model is: provide a kind of frequency-variable kitchen ventilator, and its electrical system adopts safety power supply circuit, to overcome the deficiencies in the prior art.
The utility model solves the technical scheme that its technical problem adopts: frequency-variable kitchen ventilator, comprise main control board, frequency changer circuit plate, also comprise the low-voltage power circuit of powering to main control board and frequency changer circuit plate, described low-voltage power circuit comprises bridge rectifier, single-chip microcomputer, also comprises condenser type program controlled hypertension circuit, switching circuit, described bridge rectifier is by triode Q1, Q3 and diode D2, D3 forms, triode Q1, the base stage of Q3 connects single-chip microcomputer, and described condenser type program controlled hypertension circuit comprises electric capacity C2, C3, C4 and triode Q4, Q5, by electric capacity C2, C3, C4 forms direct current step pressure reducing, triode Q4, the base stage of Q5 connects described single-chip microcomputer, and described switching circuit comprises two groups of program control synchro switches, first group of program control synchro switch K1, K2 connects the output of described bridge rectifier, the input of electric capacity C2 and triode Q4, thus bridge rectifier and late-class circuit can be disconnected by first group of program control synchro switch, second group of program control synchro switch K3, K4 connects the output of electric capacity C2 and triode Q4, the input of electric capacity C3 and triode Q5 is closed when two groups of program control synchro switches are different.
Connect the first output voltage detecting circuit at the input of described first group of program control synchro switch, described output voltage detecting circuit is made up of resistance R7, R8, R9, and resistance R8 connects described single-chip microcomputer.
Also comprise stand-by power supply circuit, described stand-by power supply circuit is made up of triode Q2, electric capacity C1, and the base stage of triode Q2 connects described single-chip microcomputer.
Connect the second output voltage detecting circuit at the output of electric capacity C4, described second output voltage detecting circuit is made up of resistance R12, R13, R14, and resistance R13 connects described single-chip microcomputer simultaneously.
Also comprise the voltage detection circuit for time synchronism calibration, described voltage detection circuit is made up of diode D1, resistance R3, R4, R5.
Compared with prior art, the beneficial effects of the utility model are:
The utility model, according to the feature of capacitance energy storage, adopts bridge switch structure, realizes the object of output safety insulating power supply.Instead of traditional transformer step-down circuit with condenser type program controlled hypertension circuit, eliminate heavy power transformer, both provided cost savings, and turn improved the power factor (PF) of civil power, for country saves a large amount of electric energy, also for power circuit saves hardware space.The utility model is by bridge switch structure, and applicating software programming technology just achieves the object of power safety isolation easily.
Accompanying drawing explanation
Fig. 1 is the low-voltage power circuit figure of the utility model frequency-variable kitchen ventilator.
Fig. 2 is the low-voltage power circuit one-chip machine port structural representation of the utility model frequency-variable kitchen ventilator.
Fig. 3 is switching circuit embodiment one structural representation of the present utility model.
Fig. 4 is switching circuit embodiment two structural representation of the present utility model.
Fig. 5 is the utility model rectification circuit oscillogram.
Embodiment
Be described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the utility model, and can not being interpreted as restriction of the present utility model.
See Fig. 1-5, frequency-variable kitchen ventilator of the present utility model comprises main control board, frequency changer circuit plate, also comprise the low-voltage power circuit of powering to main control board and frequency changer circuit plate, described low-voltage power circuit comprises bridge rectifier 1, single-chip microcomputer, also comprises condenser type program controlled hypertension circuit, switching circuit 3, described bridge rectifier is by triode Q1, Q3 and diode D2, D3 forms, triode Q1, the base stage of Q3 connects single-chip microcomputer, and described condenser type program controlled hypertension circuit comprises electric capacity C2, C3, C4 and triode Q4, Q5, by electric capacity C2, C3, C4 forms direct current step pressure reducing, triode Q4, the base stage of Q5 connects described single-chip microcomputer, and described switching circuit comprises two groups of program control synchro switches, first group of program control synchro switch K1, K2 connects the output of described bridge rectifier, the input of electric capacity C2 and triode Q4, thus bridge rectifier and late-class circuit can be disconnected by first group of program control synchro switch, second group of program control synchro switch K3, K4 connects the output of electric capacity C2 and triode Q4, the input of electric capacity C3 and triode Q5 is closed when two groups of program control synchro switches are different.Traditional bridge rectifier is constituted by a diode, and the utility model is broken the normal procedure, and forms bridge rectifier, controlled by Single Chip Microcomputer (SCM) program by triode and D2, D3.
Connect the first output voltage detecting circuit 2 at the input of described first group of program control synchro switch, described output voltage detecting circuit is made up of resistance R7, R8, R9, and resistance R8 connects described single-chip microcomputer.The utility model also comprises stand-by power supply circuit, and described stand-by power supply circuit is made up of triode Q2, electric capacity C1, and the base stage of triode Q2 connects described single-chip microcomputer.When the undertension that bridge rectifier 1 exports, stored program controlled starts stand-by power supply circuit, with the deficiency of supplementary bridge rectifier, voltage is exported more stable.
Connect the second output voltage detecting circuit 4 at the output of electric capacity C4, described second output voltage detecting circuit is made up of resistance R12, R13, R14, and resistance R13 connects described single-chip microcomputer simultaneously.The utility model also comprises the voltage detection circuit for time synchronism calibration, and described voltage detection circuit is made up of diode D1, resistance R3, R4, R5.
The utility model realizes the effect of grammed switch Secure isolation power supply by multiple functional circuits such as singlechip chip control program, the program control rectification circuit of high voltage transistor, capacitor step-down programme control circut, program control bridge switch Secure isolation circuit, low frequency voltage stabilizing programme control circut, PWM pulse-width modulation circuits.Triode Q1, Q3 and diode D2, D3 tetra-transistors form program control rectification circuit.The course of work of its program control rectification is as follows: Q1, Q3, D2 and the D3 full-wave bridge rectifier circuit with traditional in principle is identical, and difference is, Q1 and Q3 is controlled by Single Chip Microcomputer (SCM) program.And traditional bridge rectifier is four diodes forms open rectification, uncontrolled.
Electric capacity C2, C3, C4 and triode Q4, Q5 form condenser type direct-current voltage reducing circuit, low frequency voltage stabilizing programme control circut and PWM pulse-width modulation circuit.What K switch 1-K4 formed is bridge switch Secure isolation programme control circut.The course of work is described below: after rectifier circuit rectifies above, and circuit charges sporadically to electric capacity C2, and the voltage on C2 generally can design higher, such as: 100-300VDC.Concrete magnitude of voltage is determined by calculating according to the size of load.What electric capacity C2, C3 and triode Q4 formed is direct-current voltage reducing circuit, carries out step-down by PWM pulse length modulation principle.Its pulse duration is also controlled by B4, B5 by program.
The course of work of K1-K4 tetra-switches is: when K1 and K2 connects, K3 and K4 must close, and now, rectification circuit charges to electric capacity C2; When K1 and K2 closes, K3 and K4 can close, and also can close, and is generally be in closure state.Now, rectification circuit stops, to C2 charging, starting triode Q4 and Q5, being controlled the Kai Heguan of triode Q4 and Q5 by program by port B4 and B5, charges to respectively electric capacity C3 and C4 in the mode of PWM pulse-width modulation.Due to now, K1 and K2 closes, so AC power circuit is above completely isolated, so DC power supply circuit is below Secure isolation.K switch 1 and K2, K3 and K4 are the switches that two groups of functions are different, and two groups of switches can close at no time simultaneously.K1-K4 switch according to the needs of application scenario can selective light lotus root, optoelectronic switch or relay etc.If selective relay, the life-span of relay and the harmony problem of operating frequency be considered.K1-K4 tetra-switches are also all controlled by Single Chip Microcomputer (SCM) program, control respectively by VK1-VK4.Four switches can adopt relay system control switch, also can adopt light lotus root switch.
Q1, Q3 two triodes are the needs according to design (calculated) load, are controlled conducting and the closedown of two triodes by program by port B1 and B3.Wherein, triode Q2 and electric capacity C1 forms stand-by power supply circuit, is also controlled by port B2 by program.Resistance R7, R8, R9 form output voltage detecting circuit, are also controlled by port RC2 by program, when rectification circuit power output is inadequate, lucky when power supply zero crossing or supply voltage U1 are less than UO again, then start stand-by power supply circuit by program.Output voltage can be avoided like this to fluctuate excessive situation.Diode D1, with resistance R3, R4, R5 form voltage detection circuit, play time synchronism calibration effect, avoid single-chip microcomputer out of hand because of time irreversibility.
Below openly specific embodiment of the utility model is only; do not form the restriction to the utility model protection range; for the utility model person of an ordinary skill in the technical field; do not departing under general idea prerequisite of the present utility model; according to technical solutions of the utility model do without the need to through the change of creative work and replacement, all should drop within protection range of the present utility model.
Claims (5)
1. frequency-variable kitchen ventilator, comprise main control board, frequency changer circuit plate, it is characterized in that: also comprise the low-voltage power circuit of powering to main control board and frequency changer circuit plate, described low-voltage power circuit comprises bridge rectifier, single-chip microcomputer, also comprises condenser type program controlled hypertension circuit, switching circuit, described bridge rectifier is by triode Q1, Q3 and diode D2, D3 forms, triode Q1, the base stage of Q3 connects single-chip microcomputer, and described condenser type program controlled hypertension circuit comprises electric capacity C2, C3, C4 and triode Q4, Q5, by electric capacity C2, C3, C4 forms direct current step pressure reducing, triode Q4, the base stage of Q5 connects described single-chip microcomputer, and described switching circuit comprises two groups of program control synchro switches, first group of program control synchro switch K1, K2 connects the output of described bridge rectifier, the input of electric capacity C2 and triode Q4, thus bridge rectifier and late-class circuit can be disconnected by first group of program control synchro switch, second group of program control synchro switch K3, K4 connects the output of electric capacity C2 and triode Q4, the input of electric capacity C3 and triode Q5 is closed when two groups of program control synchro switches are different.
2. frequency-variable kitchen ventilator according to claim 1, it is characterized in that: connect the first output voltage detecting circuit at the input of described first group of program control synchro switch, described output voltage detecting circuit is made up of resistance R7, R8, R9, and resistance R8 connects described single-chip microcomputer.
3. frequency-variable kitchen ventilator according to claim 1, is characterized in that: also comprise stand-by power supply circuit, and described stand-by power supply circuit is made up of triode Q2, electric capacity C1, and the base stage of triode Q2 connects described single-chip microcomputer.
4. frequency-variable kitchen ventilator according to claim 1, it is characterized in that: connect the second output voltage detecting circuit at the output of electric capacity C4, described second output voltage detecting circuit is made up of resistance R12, R13, R14, and resistance R13 connects described single-chip microcomputer simultaneously.
5. frequency-variable kitchen ventilator according to claim 1, is characterized in that: also comprise the voltage detection circuit for time synchronism calibration, and described voltage detection circuit is made up of diode D1, resistance R3, R4, R5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520875257.1U CN205051576U (en) | 2015-11-05 | 2015-11-05 | Frequency conversion smoke ventilator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520875257.1U CN205051576U (en) | 2015-11-05 | 2015-11-05 | Frequency conversion smoke ventilator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205051576U true CN205051576U (en) | 2016-02-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520875257.1U Expired - Fee Related CN205051576U (en) | 2015-11-05 | 2015-11-05 | Frequency conversion smoke ventilator |
Country Status (1)
| Country | Link |
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| CN (1) | CN205051576U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105305813A (en) * | 2015-11-05 | 2016-02-03 | 顺德职业技术学院 | Frequency conversion smoke exhaust ventilator |
-
2015
- 2015-11-05 CN CN201520875257.1U patent/CN205051576U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105305813A (en) * | 2015-11-05 | 2016-02-03 | 顺德职业技术学院 | Frequency conversion smoke exhaust ventilator |
| CN105305813B (en) * | 2015-11-05 | 2018-04-20 | 顺德职业技术学院 | Frequency-variable kitchen ventilator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160224 Termination date: 20191105 |
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| CF01 | Termination of patent right due to non-payment of annual fee |