CN201252646Y

CN201252646Y - Novel electric heater

Info

Publication number: CN201252646Y
Application number: CNU2008200501838U
Authority: CN
Inventors: 陈梓平
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-07-07
Filing date: 2008-07-07
Publication date: 2009-06-03
Anticipated expiration: 2018-07-07

Abstract

The utility model relates to an electric heater, in particular to a heater which utilizes a heating element to heat and conduct heat. The heater comprises the heating element contacted with a heated object and a control circuit controlling the working state of the heating element; wherein, the heating element comprises a field effect transistor; the energy coming from a power supply is directly applied on the field effect transistor; and by adjusting the voltage between the grid and the drain of the field effect transistor, the dissipated power of the field effect transistor is regulated in order to regulate heating power. The utility model has the advantages of simple circuit, low cost and easy control.

Description

A kind of novel electric heater unit

Technical field

The utility model relates to a kind of electric heater unit, and especially a kind of nationality is by the heater of heater heating and heat conducting.

Background technology

In electronic technology field, the components and parts of meeting heat production are a lot of during energising work, as be usually used in field effect transistor in amplifying circuit or the switching circuit, it is a kind of voltage control device, its characteristic resembles electron tube, has very high input impedance, as long as load a load at the drain-source interpolar, regulation and control by the control pole tension just can realize bigger power gain.Meanwhile, also produce big heat and carry out heat loss through conduction by heat carrier.This just requires the essential radiator of installing when using this components and parts, guarantee the normal use of field effect transistor, obviously this specific character has also restricted it and has further expanded application, and its this intrinsic specific character of the true good utilisation of the applicant creatively discloses its new purposes in field of electric heating.Control the heater easier, that cost is cheaper and done useful exploration for pursuing a kind of having more.

Summary of the invention

The purpose of this utility model is the heater that a kind of novel simple will be provided, and is the device that the heat that utilizes field effect transistor self to be produced during work in energising transmits and heats specifically, and circuit is simple, controls simple and easy.

Field effect transistor self can heat production be well-known when energising work, enlightened by this, above-mentioned purpose of the present utility model realizes by following technical scheme: promptly the utility model comprise one with heating thing contacted heater, the control circuit of one control heater operating state, described heater is made of field effect transistor, energy from power supply directly is loaded on the described field effect transistor, and nationality is regulated and control the dissipation power of field effect transistor and then the regulation and control of realization heating power by adjusting the voltage between described fet gate and drain electrode.

Described field effect transistor is to be used in combination more than one.

Described field effect transistor is any connected mode that can adopt between many each field effect transistor when being used in combination in series, parallel, the series-parallel connection.

Compare with the conventional electric heating device technique, have following advantage:

The one, the utility model is owing to be that the heat of utilizing field effect transistor to produce heats, and it is simple to have an integrated circuit, the characteristics that cost is low.

The 2nd, field effect transistor is to belong to voltage control, only needs to regulate just its dissipation power of may command of its input voltage in use, and big more himself the quantity of heat production of dissipation power is just big more, and heating power is also just big more, controls very simple and easy.

Description of drawings

Fig. 1 is a circuit flow chart element intention of the present utility model;

Fig. 2 is a circuit diagram of the present utility model;

Fig. 3 is an embodiment schematic diagram of the present utility model;

Fig. 4 is the circuit diagram that a plurality of field effect transistor of the present utility model is used in combination.

Embodiment

As shown in Figure 1, the utility model comprises a heater 1 that is made of field effect transistor, the control circuit of one control heater, 1 operating state, drain electrode of described field effect transistor and source electrode join with the positive and negative electrode of power supply respectively, described fet gate and control circuit join, and regulate and control the dissipation power of this field effect transistor and then the regulation and control of realization heating power by control circuit.

The drain electrode of field effect transistor connects with positive electrode and joins as shown in Figure 2, source electrode and negative electrode join, control signal PWM amplifies the back to capacitor C 1 charging via the amplifying circuit that R1, R2, R3, R4, G1, G2 formed, when the pulse width variation of PWM, lifting also appears in the voltage at C1 two ends thereupon, has just realized the grid of field effect transistor is regulated and control through R5 like this.Specifically, promptly when the pulse duration of PWM increased, the voltage at C1 two ends raise, and the electric current of field effect transistor increases, and dissipation power increases, and quantity of heat production also is that heating power increases thereupon.

Otherwise when the pulse duration of PWM narrowed down, the voltage at C1 two ends reduced, and the electric current of field effect transistor reduces, and dissipation power diminishes, and quantity of heat production also is that heating power also just diminishes thereupon.

C2 is an anti-interference capacitor among the figure, prevents that extraneous signal from disturbing the normal use of field effect transistor.

R6 is a shunt resistance among the figure, and its exit and AD mouth (being single-chip microcomputer current feedback interface) join, and are used for sensed current signal.

Fig. 3 is the Heating Cup that utilizes heater described in the utility model made, in the present embodiment, cup 2 is with cup 3 and is tightly connected, cup 3 is provided with one and is used to install heater 4 pits 5, heater 4 is made of field effect transistor, also be provided with in the cup 3 and be used to control the control circuit 6 of field effect transistor and be used for the supply socket 7 that external power supply is used, also be provided with the control panel 8 that is used to control usefulness on the outer surface of cup 3.Be electrical connection between above-mentioned field effect transistor, control circuit, supply socket and control panel.

To heat thing during use and put into cup 2, and supply socket 7 be refuted connect corresponding power supply, nationality is controlled setting by control panel 8, field effect transistor work heat production and make heater heating, and the heating thing heats up gradually until boiling after heat conduction.

Obviously, when needs heat with a field effect transistor during heat more greatly is unrealistic, use so also can take in actual applications many field effect transistor are combined in the lump, and will many field effect transistor series connection or parallel connection even the series-parallel connection use of getting up according to the requirement of circuit; As shown in Figure 4, it is exactly the circuit diagram that a plurality of field effect transistor tandem compounds are used; Among the figure, the source electrode of first field effect transistor and the drain electrode of second field effect transistor are joined, and the source electrode of second field effect transistor and the drain electrode of the 3rd field effect transistor are joined, analogize therewith, until N only, again the drain electrode of first field effect transistor and the source electrode of N field effect transistor are joined with positive electrode and negative electrode respectively.

Claims

1, a kind of novel heater; comprise one with heating thing contacted heater; the control and the protective circuit of one control heater operating state; it is characterized in that described heater is made of field effect transistor; energy from power supply directly is loaded on the described field effect transistor, and nationality is regulated and control the dissipation power of this field effect transistor and then the regulation and control of realization heating power by adjusting the voltage between described fet gate and drain electrode.

2, a kind of novel heater according to claim 1 is characterized in that described field effect transistor is to be used in combination more than one.

3, a kind of novel heater according to claim 2 is characterized in that described field effect transistor is any connected mode that can adopt between many each field effect transistor when being used in combination in series, parallel, the series-parallel connection.