CN201903769U

CN201903769U - Control circuit of juicer

Info

Publication number: CN201903769U
Application number: CN201020641083XU
Authority: CN
Inventors: 倪祖根
Original assignee: Kingclean Electric Co Ltd
Current assignee: Kingclean Electric Co Ltd
Priority date: 2010-12-03
Filing date: 2010-12-03
Publication date: 2011-07-20
Anticipated expiration: 2020-12-03

Abstract

The utility model discloses a control circuit of a juicer, which comprises a central processing unit, a depressurization, rectification and filter circuit, a current sampling circuit unit, a power silicon controlled rectifier, a triggering unit and a motor, wherein the depressurization, rectification and filter circuit is used for supplying low-voltage power to the central processing unit, the current sampling circuit unit is connected with one end of a main supply alternating current power source and outputting sampling signals to the central processing unit, the power silicon controlled rectifier is connected with the current sampling circuit unit in series, the triggering unit is connected with control electrodes of the power silicon controlled rectifier and controlled by the central processing unit, and the central processing unit samples the current by the aid of the current sampling circuit unit and controls the operation of the motor. The control circuit of the juicer is capable of improving efficiency, reducing noises and braking rapidly.

Description

The control circuit of juice extractor

Technical field

The utility model relates to a kind of control circuit of juice extractor.

Background technology

Traditional control control of DC element all adopts direct current control element-metal-oxide-semiconductor or IGBT, its control mode is: earlier alternating current is rectified into direct current through rectification circuit, utilize the direct current after the DC control element is controlled its rectification then, direct current after the control is supplied with direct current generator, this control mode control circuit complexity and cost are higher, therefore traditional juice extractor all adopts alternating current generator to be used as power source, yet the alternating current chance changes rotating speed with load variations, make that the work efficiency of juice extractor is lower, the noise of juice extractor is also higher simultaneously.

Summary of the invention

A purpose of the present utility model is: the control circuit that a kind of juice extractor of raising the efficiency is provided.

For reaching above-mentioned purpose, the technical solution of the utility model is: a kind of control circuit of juice extractor, it comprises: this control circuit comprises CPU (central processing unit) at least, the decompression rectifier filter circuit unit of low-tension supply is provided to CPU (central processing unit), link to each other with mains ac power supply one end and to the current sampling circuit unit of CPU (central processing unit) output sampled signal, the power controlled silicon that is connected with the current sampling circuit units in series, extremely link to each other with the control of this power controlled silicon and by the trigger element of central processing unit controls, and motor, wherein CPU (central processing unit) is come sample rate current by the current sampling circuit unit, and the operation of control motor.

The utility model advantage is:

Adopt controllable silicon to be used as controlling the control of DC element, its earlier with alternating current through controllable silicon copped wave, then the alternating current after controllable silicon copped wave is supplied with rectification circuit, directly supply with direct current generator after the rectification circuit rectification, cost is low and safe and reliable thus, thereby has improved the efficient of juice extractor, has further reduced the noise of juice extractor, simultaneously can motor be stopped operating, improve the security performance of juice extractor greatly.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further described:

Fig. 1 is a functional block diagram of the present utility model.

Fig. 2 is circuit theory diagrams of the present utility model.

Wherein: 1, decompression rectifier filter circuit unit; 2, current sampling circuit unit; 3, brake units; 4, gear input block; 5, copped wave module; 6, rectification module; 7, trigger element.

Embodiment

Embodiment: shown in Fig. 1-2, the utility model provides a kind of specific embodiment of control circuit of juice extractor, it comprises CPU (central processing unit) U, the decompression rectifier filter circuit unit 1 of low-tension supply is provided to CPU (central processing unit) U, link to each other with mains ac power supply one end and to the current sampling circuit unit 2 of CPU (central processing unit) U output sampled signal, the power controlled silicon TR1 that is connected in series with current sampling circuit unit 2, the trigger element 7 that extremely links to each other with this power controlled silicon TR1 control and control by CPU (central processing unit) U, direct current generator M, link to each other with the mains ac power supply other end and offer the rectification module 6 of direct current generator M direct supply, the brake units 3 that connects direct current generator M two ends, wherein rectification module 6 is connected in series with power controlled silicon TR1, CPU (central processing unit) U comes sample rate current by current sampling circuit unit 2, and operation and the brake of control direct current generator M, power controlled silicon TR1 and together form copped wave module 5 with the capacitor C 11 that power controlled silicon TR1 is connected in parallel.Its principle of work is as follows: adopt power controlled silicon TR1 to be used as controlling the control element of direct current generator M, its earlier with alternating current through power controlled silicon TR1 copped wave, then the alternating current after power controlled silicon TR1 copped wave is supplied with rectification module 6, directly supply with direct current generator M after rectification module 6 rectifications.

As Fig. 2, decompression rectifier filter circuit unit 1 is made of jointly decompression capacitor C2, first and second filter capacitor (C3, C4), first and second commutation diode (D1, D2), dropping resistor R4, continued flow resistance R3, first and second adjusting resistance (R5, R6) and regulator block U1, the first filter capacitor C3, one termination mains ac power supply, one end, another termination second commutation diode D2 positive pole, the second commutation diode D2 negative pole then connects the mains ac power supply other end through decompression capacitor C2, dropping resistor R4 successively, and continued flow resistance R3 is connected in parallel on decompression capacitor C2 two ends; The first commutation diode D1 negative pole and the first filter capacitor C3 positive pole link together, and link together with the second commutation diode D2 negative pole and the first commutation diode D1 is anodal; 3 pin of regulator block U1 and 2 pin are connected to the anodal and negative pole place of the first filter capacitor C3, are connected on 3 pin, 2 pin of regulator block U1 after described adjusting resistance R 5, the R6 series connection respectively, and first and second regulates 1 pin that resistance (R5, R6) connecting place is connected on regulator block U1.2 pin of described regulator block U1 are as the earth terminal of CPU (central processing unit) U and insert among the interface u5 of CPU (central processing unit) U; 3 pin of this regulator block U1 are held and are inserted among the interface u7 of CPU (central processing unit) U as power supply+5V of CPU (central processing unit) U; The described second filter capacitor C4 inserts between above-mentioned power supply+5V end and the earth terminal.

Current sampling circuit unit 2 is by sampling current-limiting resistance R18, with sampling current-limiting resistance R18 pull-up resistor R19 in parallel, one end and the sampling resistor R20 that power controlled silicon TR1 links to each other and the other end links to each other with the mains ac power supply, the direct earth capacitance C9 that links to each other with sampling current-limiting resistance R18, sampling capacitance C10, with commutation diode D3, wherein sampling resistor R20 and pull-up resistor R19 are connected in parallel on sampling capacitance C10 two ends, commutation diode D3 one end links to each other with sampling resistor R20, the other end links to each other with sampling capacitance C10, the end that connects altogether of sampling current-limiting resistance R18 and direct earth capacitance C9 links to each other with CPU (central processing unit) U, current sampling unit 2 is gathered the size of electric current in the ac circuit in real time, when the current value that collects is greater than or less than pre-set threshold value, cuts off major loop direct current generator M is quit work.

Trigger element 7 comprises the protective resistance R22 that extremely links to each other with power controlled silicon TR1 control; the trigger tube D5 that links to each other with protective resistance R22 series connection; be connected in parallel with trigger tube D5 and triggering capacitor C 12 that an end and one of power controlled silicon TR1 extremely link to each other; and the triggering loop of the parallel connection of two-way at least that links to each other with trigger tube D5; present embodiment preferably triggers the loop with six the tunnel; because it is identical that loop structure is triggered on every road; so emphasis is set forth wherein two-way; other four the tunnel are not then described in detail; wherein two-way triggers the loop and includes the current-limiting resistance (R13 that links to each other with CPU (central processing unit) U; R14); the gear gating controllable silicon (TR2 that links to each other with mains ac power supply one end; TR3); with gear gating controllable silicon (TR2; TR3) the continuous controlling resistance (R23 of trigger electrode; and be positioned at gear gating controllable silicon (TR2 R24); TR3) and the triggering resistance (R28 between the trigger tube D5; R29).Trigger the loop by above-mentioned six the tunnel, the on off operating mode of current-limiting resistance (R13, R14, R15, R16, R17, R34) by the signal controlling gear gating controllable silicon (TR2, TR3, TR4, TR5, TR6, TR7) of central processing unit U that is connected u9, u10, u11, u12, u4, the u3 port of central processing unit U changes power controlled silicon TR1 and triggers resistance value in the loop, give the charging rate that triggers capacitor C 12 thereby change, reach the effect of the power controlling controllable silicon TR1 control utmost point then.

Gear input block 4 is by pull down resistor R8, first, two gear pull-up resistor (R9, R10), first, two gear current-limiting resistance (R11, R12), first, two gear electric capacity (C7, C8) form, wherein first, two gear pull-up resistor (R9, R10) all be connected+5V high level position, pull down resistor R8 is connected the low level position, according to rotary switch present position difference, first, two gear current-limiting resistance (R11, R12) level of an end changes first with height, two gear current-limiting resistance (R11, R12) other end and first, two gear electric capacity (C7, C8) end connects and inserts the gear selection port u1 of CPU (central processing unit) U, among the u14.And the gear of CPU (central processing unit) U selects port u1, u14 according to different total " 00,01,10,11 " the four kinds of states in rotary switch present position, and CPU (central processing unit) U makes respective handling according to four kinds of different conditions.

During work, CPU (central processing unit) U is according to the on off operating mode of the different range state control gear gating controllable silicons (TR2, TR3, TR4, TR5, TR6, TR7) of gear input block 4, thereby change power controlled silicon TR1 and trigger resistance value in the loop, change the charging rate that triggers capacitor C 12, size with the conduction angle that reaches power controlling controllable silicon TR1, rectification module 6 is supplied with direct current generator M according to the direct rectification of alternating voltage after regulating through power controlled silicon TR1 after the rectification.Thereby make direct current generator M operate in each speed, the first linked switch SW1 closure when operate as normal, the second linked switch SW2 disconnects, two linked switches interlock during brake, the first linked switch SW1 disconnects, the second linked switch SW2 closure, and this moment, the current supply circuit of direct current generator M disconnected, direct current generator M discharges, thereby plays braking action by the second linked switch SW2, power resistor R36 loop because of the electric energy that the inertia rotation is produced.

In addition when direct current generator M starts, also can come the soft start of the conduction angle of power controlling controllable silicon TR1 in proper order, direct current generator M electric current is slowly risen by the break-make of regulation stall gating controllable silicon (TR2, TR3, TR4, TR5, TR6, TR7) with realization direct current generator M.

The utility model cost is low and safe and reliable, has improved the efficient of juice extractor, has further reduced the noise of juice extractor, can motor be stopped operating simultaneously, has improved the security performance of juice extractor greatly.

Certainly the foregoing description only is explanation technical conceive of the present invention and characteristics, and its purpose is to allow the people who is familiar with this technology can understand content of the present invention and enforcement according to this, can not limit protection scope of the present invention with this.The all spirit of main technical schemes is done according to the present invention equivalent transformation or modification all should be encompassed within protection scope of the present invention.

Claims

1. the control circuit of a juice extractor, it is characterized in that it comprises: CPU (central processing unit) (U), the decompression rectifier filter circuit unit (1) of low-tension supply is provided to CPU (central processing unit) (U), link to each other with mains ac power supply one end and to the current sampling circuit unit (2) of CPU (central processing unit) (U) output sampled signal, the power controlled silicon (TR1) that is connected in series with current sampling circuit unit (2), the trigger element (7) that extremely links to each other with the control of this power controlled silicon (TR1) and control by CPU (central processing unit) (U), and motor (M), wherein CPU (central processing unit) (U) is come sample rate current by current sampling circuit unit (2), and the operation of control motor (M).

2. control circuit according to claim 1, it is characterized in that: it further comprises the rectification module (6) that links to each other with the mains ac power supply other end and be connected in series with power controlled silicon (TR1), and described motor (M) is a direct current generator, and wherein rectification module (6) provides direct supply to motor (M).

3. control circuit according to claim 1, it is characterized in that: described current sampling circuit unit (2) is by sampling current-limiting resistance (R18), with sampling current-limiting resistance (R18) pull-up resistor (R19) in parallel, one end and the sampling resistor (R20) that power controlled silicon (TR1) links to each other and the other end links to each other with the mains ac power supply, the direct earth capacitance (C9) that links to each other with sampling current-limiting resistance (R18), sampling capacitance (C10), and commutation diode (D3), wherein sampling resistor (R20) and pull-up resistor (R19) are connected in parallel on sampling capacitance (C10) two ends, described commutation diode (D3) end links to each other with sampling resistor (R20), the other end links to each other with sampling capacitance (C10), and the end that connects altogether of sampling current-limiting resistance (R18) and direct earth capacitance (C9) links to each other with CPU (central processing unit) (U).

4. control circuit according to claim 1; it is characterized in that: described trigger element (7) comprise the protective resistance (R22) that extremely links to each other with power controlled silicon (TR1) control, with protective resistance (R22) connect the trigger tube (D5) that links to each other, be connected in parallel with trigger tube (D5) and the triggering loop of triggering electric capacity (C12) that an end and one of power controlled silicon (TR1) extremely link to each other and the parallel connection of two-way at least that links to each other with trigger tube (D5), wherein trigger the loop and comprise a gear gating controllable silicon (TR2, TR3) at least.

5. control circuit according to claim 4, it is characterized in that: described every road is triggered the loop and is included the current-limiting resistance (R13, R14) that links to each other with CPU (central processing unit) (U), the gear gating controllable silicon (TR2, TR3) that links to each other with mains ac power supply one end, the controlling resistance (R23, R24) that links to each other with gear gating controllable silicon (TR2, TR3) trigger electrode, and be positioned at triggering resistance (R28, R29) between gear gating controllable silicon (TR2, TR3) and the trigger tube (D5).