CN206111606U - Minitype fan - Google Patents

Abstract

The utility model relates to a minitype fan, including body, guard shield, fan motor, controller, this internal dry battery contact and USB charging socket of setting up, dry battery contact and USB charging socket parallel connection, the mainboard port of controller is connected with fan motor, direct current boost circuit electricity respectively. The utility model discloses a direct current boost circuit supplies power to fan motor, and configuration USB socket and dry battery box can use the dry battery or connect to insert and use on the computer, have small light in weight, convenient to use's advantage.

Description

Mini-fan

Technical field

This utility model is related to fan technology field, is to be related to a kind of mini-fan of direct current supply more specifically.

Background technology

Mini-fan with its low price, small volume, advantage that is easy to carry, being suitable to personal use and it is very popular.City Seen mini-fan is all to use aneroid battery or rechargeable battery on field, and the power of motor is all smaller, the size of such fan blade Just it is necessarily limited, wind-force is faint.Also there is a kind of mini-fan of use USB on the market, it can patch computer USB Interface simultaneously shares power supply with computer, because the voltage of USB interface is relatively low, also need to increase transformer boost circuit in fan with wind The use power of fan motor is adapted, so that the electric cavity volume of mini-fan is than larger, it has not been convenient to carry and use.

Utility model content

The technical problems to be solved in the utility model is：There is provided a kind of compact, cooling effect good mini-fan, with Overcome the deficiencies in the prior art.

This utility model solves the technical scheme that its technical problem adopted：A kind of mini-fan, including body, shield Cover, fan electromotor, controller, this arranges in vivo aneroid battery contact and USB charging sockets, and the aneroid battery contact and USB charge Socket is connected in parallel, and the mainboard port of controller electrically connects respectively with fan electromotor, DC voltage booster circuit.

DC voltage booster circuit include chip controls program, charged in parallel series boosting circuit, voltage detecting supervisory circuit, Pwm circuit；The DC boosting electricity that the charged in parallel series boosting circuit is made up of diode, electric capacity, boosting grammed switch Road, DC voltage booster circuit controls break-make by grammed switch；That the pwm circuit is made up of pliotron and filter capacitor, And by programme-control audion break-make, realizing the adjustable mu balanced circuit of output frequency.

The chip controls program includes hardware single-chip microcomputer, and the single-chip microcomputer has multiple A/D change-over circuits ports.

The voltage detecting supervisory circuit, be by a plurality of resistance and singlechip group into DC voltage detection circuit, and By program read voltage information.

The charged in parallel series boosting circuit include by diode and capacitive series branch D1 and C1, D2 and C2, D3 and C3 constitutes charged in parallel circuit, and the boosting grammed switch includes two groups of program control synchro switches, first group of program control synchro switch K1, K2 is connected between three electric capacity, and second group of program control synchro switch connects respectively negative terminal, the negative terminal of C2 and C3 of C1 and C3, Two groups of program control synchro switches are not closed at.

The beneficial effects of the utility model are as follows：

This utility model is powered by DC voltage booster circuit to fan electromotor, configures USB and casing for dry batteries, can be used Aneroid battery or patch is used on computers, has the advantages that small in volume, easy to use.

DC voltage booster circuit of the present utility model eliminates transformator, and employing capacitor carries out charged in parallel, Ran Houzai The circuit structure of series boosting, eliminates the inductance or transformator of heaviness, saves cost.

Description of the drawings

Fig. 1 is the structural representation of this utility model mini-fan.

Fig. 2 is this utility model mini-fan schematic block circuit diagram.

Fig. 3 is the DC voltage booster circuit figure of this utility model mini-fan.

Specific embodiment

Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein ad initio Same or similar element is represented to same or similar label eventually or the element with same or like function.Below by ginseng The embodiment for examining Description of Drawings is exemplary, is only used for explaining this utility model, and it is not intended that to of the present utility model Limit.

As Figure 1-3：Mini-fan of the present utility model, including body 7, shield 8, fan electromotor 9, controller（Figure Do not show）, aneroid battery contact, fan swicth 5 and USB charging sockets 6 are set on body, the aneroid battery contact and USB charge and insert Mouth is connected in parallel, and the mainboard port of controller electrically connects respectively with fan electromotor, DC voltage booster circuit.

DC voltage booster circuit include chip controls program, charged in parallel series boosting circuit 1, voltage detecting supervisory circuit 2, Pwm circuit 3.The chip controls program includes hardware single-chip microcomputer, and the single-chip microcomputer must have multiple A/D（Analog/digital）Turn Change circuit port.The DC voltage booster circuit that the charged in parallel booster circuit is made up of diode, electric capacity, grammed switch, and By the break-make of grammed switch, to realize the purpose of DC boosting.The voltage detecting supervisory circuit, is by a plurality of resistance and list The DC voltage detection circuit of piece machine composition, and by program read voltage information, to realize detecting and whether monitor input voltage Normal purpose.The pwm circuit is made up of pliotron and filter capacitor, and by the logical of programme-control audion It is disconnected, to realize the adjustable circuit of output frequency.

Multigroup diode and capacitive series branch（D1 and C1, D2 and C2, D3 and C3）Compose in parallel charged in parallel circuit.Open Close（K1 and K2, K3 and K4）Automatic switching circuit is collectively constituted with single-chip microcomputer, electric capacity string is automatically converted into by electric capacity charged in parallel The circuit structure of connection boosting, two groups of K1 and K2, K3 and K4 switches on-off by one-chip machine port VK1, VK2 control.It is in parallel Charge and the course of work of series boosting is as follows：During charged in parallel, K1 and K2 disconnects, and K3 and K4 is closed, and BT1 provides unidirectional current Source, is charged respectively by D1, D2 and D3 to C1, C2 and C3.After the completion of charged in parallel, by Single Chip Microcomputer (SCM) program control, first from dynamic circuit breaker K3 and K4 is opened, K1 and K2 is then closed automatically again.Now, three electric capacity have just been automatically converted into cascaded structure by parallel-connection structure, Realize the purpose of boosting.In figure, the effect of D1, D2 and D3 is：Prevent when electric capacity parallel-connection structure is converted into capacitances in series structure Capacitance short-circuit.K1 and K2 constitutes one group of switch, and K3 and K4 constitutes one group of switch, and two groups of switches necessarily can not be closed at, but permits Permitted to simultaneously switch off.

Resistance（R1、R2、R3）Voltage detecting and supervisory circuit are constituted with RC1 ports.R1 and R2 composition bleeder circuits, R3 rises Metering function, RC1 connection one-chip machine ports.Voltage on resistance R2 can detect the voltage exported after capacitances in series Value, while whether the magnitude of voltage that booster circuit can also be monitored by single-chip microcomputer is normal.

Diode D4 and electric capacity C4 composition charging filter circuits, wherein D4 is played prevents circuit reversely charging electro ultrafiltration.Audion Q1 and electric capacity C5 composition pulse wide voltage-regulation mu balanced circuits, resistance（R5, R6 and R7）The detection supervisory circuit of composition output voltage.Work Process description is as follows：After the boosting of above capacitances in series, D4 charges always to C4, to ensure the supply of power supply.Port B1 with Single-chip microcomputer connects, and the break-make of Q1 is controlled by single-chip microcomputer, it is possible to adjust the turn-on frequency of Q1 switches, defeated to reach scalable Go out the purpose of the dutycycle of voltage, so as to realize adjusting the purpose of output voltage values.Output voltage is filtered by C5 electric capacity And voltage stabilizing.Whether the last output voltage detecting circuit for consisting of R5, R6, R7 again is normal to monitor output voltage.Wherein, RC2 is connected with single-chip microcomputer, and the size of output voltage values is detected by single-chip microcomputer, while and according to the size of output voltage values come Monitoring and the dutycycle of regulation Q1.To realize the stable purpose of output voltage.

K1-K4 switches can select optocoupler, photoswitch or relay etc. according to the needs of application scenario.If select after Electrical equipment will then consider the life-span of relay and the harmony problem of operating frequency.Tetra- switches of K1-K4 are also all by Single Chip Microcomputer (SCM) program Control, it is controlled by VK1-VK4 respectively.Four switches can adopt relay system controlling switch, and optocoupler switch may also be employed Circuit.

While there has been shown and described that embodiment of the present utility model, it will be understood by those within the art that： In the case of without departing from principle of the present utility model and objective various changes, modification, replacement can be carried out to these embodiments And modification, scope of the present utility model is limited by claim and its equivalent, in changing for being made without creative work Enter, should be included within protection domain of the present utility model.

Claims (4)

1. mini-fan, including body, shield, fan electromotor, controller, it is characterised in that：This arranges in vivo aneroid battery contact With USB charging sockets, the aneroid battery contact and USB charging sockets be connected in parallel, the mainboard port of controller respectively with fan Motor, DC voltage booster circuit electrical connection；DC voltage booster circuit includes chip controls program, charged in parallel series boosting circuit, electricity Pressure detection supervisory circuit, pwm circuit；The charged in parallel series boosting circuit is by diode, electric capacity, boosting grammed switch group Into DC voltage booster circuit, DC voltage booster circuit controls break-make by grammed switch；The pwm circuit is by pliotron and filter Ripple electric capacity composition and by programme-control audion break-make, realizing the adjustable mu balanced circuit of output frequency.

2. mini-fan according to claim 1, it is characterised in that：The chip controls program includes hardware single-chip microcomputer, institute State single-chip microcomputer and there are multiple A/D change-over circuits ports.

3. mini-fan according to claim 2, it is characterised in that：The voltage detecting supervisory circuit, is by a plurality of electricity Resistance and singlechip group into DC voltage detect circuit, and by program read voltage information.

4. according to the arbitrary mini-fan of claim 1-3, it is characterised in that：The charged in parallel series boosting circuit includes Charged in parallel circuit, the boosting grammed switch bag are constituted by diode and capacitive series branch D1 and C1, D2 and C2, D3 and C3 Two groups of program control synchro switches are included, first group of program control synchro switch K1, K2 are connected between three electric capacity, second group program control same Step switch connects respectively negative terminal, the negative terminal of C2 and C3 of C1 and C3, and two groups of program control synchro switches are not closed at.