CN2703975Y

CN2703975Y - Speed-regulation micro computer controller for kitchen hood

Info

Publication number: CN2703975Y
Application number: CN 200320108074
Authority: CN
Inventors: 缪仙荣
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-11-17
Filing date: 2003-11-17
Publication date: 2005-06-08
Anticipated expiration: 2013-11-17

Abstract

The utility model discloses a speed-regulation micro computer controller for kitchen hood which is composed of a power circuit, a clock pulse forming circuit, a micro computer handler MCU, an illumination output circuit and a speed governing demand output and buffer execution circuit. The MCU is regarded as the kernel and is externally connected with a key matrix, a display unit and a load. The buffer execution circuit controls the input power of a motor to alter the rotational speed of the motor on the ground of the MCU speed governing controlling signal; the power circuit generates low-voltage power supply desired by the system; the clock pulse forming circuit generates clock pulse needed by a micro computer; an executive system respectively finishes command input of lighting switch, acceleration, deceleration and closedown; the display unit respectively displays active state of a smoke exhaust ventilator and rotational speed indicating; a buffer transformation device is used for isolating strong electricity and outputs a safety low voltage used for illuminating lamps. The utility model with a strong and weak electricity system with no electric connection has reliable insulation measure, whose structure, size, operation display modus are all compatible with the conventional control device of the existing smoke exhaust ventilators.

Description

Smoke exhaust ventilator speed governing microcomputer controller

Technical field

The utility model belongs to electric and electronic technical field, relates to a kind of smoke exhaust ventilator speed governing microcomputer controller.

Technical background

Smoke exhaust ventilator in the market generally has only fast, slow two grades of rotating speeds, can not satisfy the user regulates suction arbitrarily under the different application situation requirement.Chinese patent ZL01238428.7 has announced a kind of frequency control smoke exhaust ventilator of Haier Group, and it is made up of power panel, DC frequency-changing module, direct current generator, microcomputer control panel, VFD display module etc., can realize stepless speed regulation to smoke exhaust ventilator.Effective, the advanced technology of this utility model speed governing of Haier Group has realized the much progress on the smoke exhaust ventilator performance.But because of adopting direct current generator, DC frequency-changing module and vacuum fluorescent display screen VFD, also cause its cost costliness, structural manufacturing process to change bigger problem, be unfavorable for its widespread usage.

Summary of the invention

The technical problems to be solved in the utility model is: the smoke exhaust ventilator speed governing microcomputer controller that a kind of practicality is provided, make it when realizing smoke exhaust ventilator stepless speed regulation, have also that cost is lower, simple to operate, intuitive display, characteristics such as safe and reliable, and with present smoke exhaust ventilator structure compatible, conventional smoke exhaust ventilator need not the process structure change can realize function upgrading.

For achieving the above object, the technical solution of the utility model is: by power circuit, clock pulses forms circuit, micro processor, the illumination output circuit, speed-regulating instruction output, keyboard matrix display system and isolation, the smoke exhaust ventilator speed governing microcomputer controller that drive circuit is formed, it is concrete to constitute is to be core with eight micro processor MCU (single-chip microcomputer), connect keyboard matrix outward, display unit and load, drive circuit is according to MCU speed regulating control signal, the control power input to machine is to change motor speed, the low-tension supply of two or more that power circuit generation system is required, clock pulses forms circuit and produces the required clock pulses of micro computer calculating, operating system is finished light switch respectively, quicken, slow down and the shutdown command input, display unit shows smoke exhaust ventilator duty and rotating speed indication respectively, isolated converter is used to isolate forceful electric power, and the output safety low-voltage is for the usefulness of illuminating lamp.

Because the smoke exhaust ventilator shell generally all makes with metal material, for guaranteeing user's safety, removing casing, to connect protection by supply socket extraterrestrial, and the utility model is also taked following quarantine measures: (1) power circuit adopts power transformer isolation forceful electric power.(2) speed governing output adopts novel electric power electric device-solid-state relay to isolate forceful electric power.(3) 12V low pressure quartz lamp is powered by isolated converter.By above-mentioned several safety measures, the strong and weak electricity system does not have and is electrically connected, and isolation safe is withstand voltage greater than 2500V, guarantees personal safety.In addition, based on the microcomputer-recognized intelligent function, the utility model possesses memory function: when starting shooting, run on set condition when shutting down last time automatically at every turn, need not the user transfer from zero, meet the daily use habit of people.Start difficulty when avoiding the work of faint wind or start-up time long, elder generation's full voltage starting goes back to weak wind operation more automatically during weak wind shelves start after 2 seconds.

Compared with prior art, advantage of the present utility model is: utilize intelligent microcomputerized control technology and novel electric power electric device, only use the stepless speed regulation of "+" "-" two key control smoke exhaust ventilators, handling safety is reliable, and display interface is directly perceived, low cost of manufacture, and structure, size and existing smoke exhaust ventilator parts compatibility, use the utility model and need not new equipment input and technology change, save investment, have remarkable economic efficiency and social benefit.

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

Description of drawings

Fig. 1 is a structure chart of the present utility model.

Fig. 2 is a theory diagram of the present utility model.

Fig. 3 is an operation display interface of the present utility model.

Fig. 4 is a schematic diagram of the present utility model.

The specific embodiment

In Fig. 1, microcomputer controller MCU is connected with operation display unit with power supply 220VAC input, alternating current generator, isolated converter respectively by interface CZ1, CZ2, CZ3, CZ4 and forms work system.

In Fig. 2, microcomputer controller MCU accepts user instruction by keyboard matrix, the output speed-regulating signal, and through isolation drive control motor speed, the light beam bar shows the length of the corresponding rotating speed correspondence of motor simultaneously.Power circuit produces system, and required+12V reaches+the 5V power supply, and clock pulses forms circuit and produces the required clock pulses of micro computer calculating.

In Fig. 4, microcomputer controller is made up of for core MCU (present embodiment adopts 8-bit microcontroller CF745), and 10,11,12,13,15 pins link to each other with display unit with keyboard matrix.Keyboard matrix comprises illumination key (L), accelerator key (+), deceleration key (-) and four touch-switch of closing key (P), finishes light switch, acceleration, deceleration and shutdown command input respectively.Display unit comprises illumination (L) indicator lamp, power supply (P) indicator lamp and trapezoidal light beam bar, shows the indication of smoke exhaust ventilator duty and rotating speed respectively.The 15 pin output speed index signals of CF745 link to each other through 5 pin of R18 and LED display driver chip (present embodiment adopts LM3914), the LED display driver chip 1, the 10-18 pin is corresponding one by one continuous with the 1-10 pin of LED display respectively.7 pin of CF745 link to each other with the T3 base stage, output speed regulating control signal, T3 colelctor electrode connect solid-state relay (present embodiment adopts JGC-4/5) 4 pin, and solid-state relay 1 pin is connected with motor, according to MCU speed regulating control signal, the control power input to machine is to change motor speed.8 pin of CF745 link to each other with the T2 base stage, the control illumination, and 9 pin of CF745 link to each other with the T1 base stage, drive buzzer.The isolating diode A utmost point connects the full-bridge rectification output, and the K utmost point connects filter capacitor C2 positive pole, and the T4 base stage extremely links to each other with isolating diode A through R5, and the T4 colelctor electrode links to each other with+Vcc through R6.The power supply clock pulses that the T4 colelctor electrode produces is sent into 6 pin of CF745 through R4,

The course of work of the present utility model is as follows:

Click " L " key, the relay J adhesive, illuminating lamp is bright, and " L " indicator lamp is also bright simultaneously; Click " L " key relay J again and discharge, illumination is extinguished, and " L " indicator lamp also extinguishes simultaneously; " L " key is the standalone feature button, and its duty is irrelevant with the state of " P ", "+" "-" key.Whenever click "+" key, motor speed increases by one grade, and the LED display light beam extends lattice toward quick (F) direction; Continue to pin "+" key, then rotating speed continues to increase, and until the most at a high speed, the LED display light beam also correspondingly continues elongation, until bright entirely; In like manner, by "-" key, mechanism is with just the opposite by "+" key.Click " P " key, the motor shutdown, " P " indicator lamp extinguishes.By "+" or "-" key, electric motor starting also runs on the rotating speed that sets when last time shutting down, and the LED screen shows corresponding length.Compare with conventional smoke exhaust ventilator, " P " key is identical with " L " key operation display mode, just makes " soon " shelves into " acceleration " (+), and " slowly " shelves make " deceleration " (-) into, meet user's use habit.

Claims

1, a kind of smoke exhaust ventilator speed governing microcomputer controller, it is characterized in that: by power circuit, clock pulses forms circuit, micro processor, the illumination output circuit, speed-regulating instruction output, keyboard matrix display system and isolation, drive circuit is formed, it is concrete to constitute is to be core with eight monolithic computer processor MCU, connect keyboard matrix outward, display unit and load, drive circuit is according to MCU speed regulating control signal, the control power input to machine is to change motor speed, the low-tension supply of two or more that power circuit generation system is required, clock pulses forms circuit and produces the required clock pulses of micro computer calculating, operating system is finished light switch respectively, quicken, slow down and the shutdown command input, display unit shows smoke exhaust ventilator duty and rotating speed indication respectively, isolated converter is used to isolate forceful electric power, and the output safety low-voltage is for the usefulness of illuminating lamp.

2, according to claim 1 described smoke exhaust ventilator speed governing microcomputer controller, it is characterized in that said keyboard matrix establishes illumination key, accelerator key, deceleration key and four touch-switch of power key successively, finish light switch, acceleration, deceleration and shutdown command input respectively.

3, the smoke exhaust ventilator speed governing microcomputer controller of stating according to claim 2, key is represented with " L ", accelerator key is represented with "+", "-" expression and power key " P " expression of deceleration key to it is characterized in that throwing light on said keyboard matrix.

4, according to the described smoke exhaust ventilator speed governing of claim 1 microcomputer controller, it is characterized in that the trapezoidal light beam bar of LED that said display unit built lighting pilot lamp (L), power supply indicator (P) and display floater are middle, show the indication of smoke exhaust ventilator duty and rotating speed respectively, light beam length is proportional to motor speed.

5,, it is characterized in that said buffer circuit is to adopt power transformer, solid-state relay and isolated converter to isolate the strong and weak electricity system according to the described smoke exhaust ventilator speed governing of claim 1 microcomputer controller.