CN206303769U - Electric oven - Google Patents

Abstract

The utility model discloses, a kind of electric oven, the problem of easy electric shock is safeguarded and cleans when powered for heating wire, there is provided following technical scheme, including oven body itself and splash pan, heating wire is provided with oven body itself, also including voltage detecting circuit, whether the powered voltage sense signal of heating wire is detected；Whether infrared circuit, send IR and reflected to export infrared detection signal by splash pan according to IR；Logic gates, is coupled to voltage detecting circuit with receiving voltage detection signal, and is coupled to infrared circuit to receive infrared detection signal, by voltage detection signal and infrared detection signal and rear output control signal；On-off circuit, is coupled to logic gates to receive control signal, in response to control signal break-make；When heating wire is powered, if infrared circuit is not detected by the IR that splash pan is reflected, on-off circuit disconnects to cut off the current supply circuit of heating wire, is ensured to user's safety belt.

Description

Electric oven

Technical field

The utility model is related to a kind of roaster, more specifically, it relates to a kind of electric oven.

Background technology

Oven is a kind of device for taking cooking toast food using hot-air, generally closing or semi-closed structure.Oven Also known as baker, baking box, ovens, oven may also be used for referring to the device for carrying out high-temperature process with hot gas.Conventional oven is used Wood, coal burning heating, and modern oven is then more using electric heating or heated by natural gas, and have automatic constant temperature system.

For example, the Chinese patent of Application No. CN200920182444.6 discloses a kind of the new of drawable formula splash pan Oven, it includes oven body itself and splash pan, and heating unit, i.e. heating wire are provided with oven body itself, and splash pan is pacified by slide rail On oven body, after baking terminates, safeguarded and cleaned after can closing quotation be pulled down.

Although splash pan can be pulled down and be safeguarded and cleaned by this oven, if tearing splash pan open when oven is powered Unload, heated because the heating wire in oven is exposed, if dismantle, safeguard and clean touching exposed heating wire, easily send out Raw electric shock accidents, the safety belt for giving people is threatened, therefore needs improvement badly.

Utility model content

In view of the shortcomings of the prior art, the purpose of this utility model is to provide a kind of maintenance and be difficult hair when cleaning The electric oven of raw electric shock accidents.

To achieve the above object, the utility model provides following technical scheme：

A kind of electric oven, including oven body itself and with the oven body itself splash pan that is connected of sliding, in the oven body itself Heating wire is provided with, is also included

Voltage detecting circuit, for detecting whether heating wire is powered with voltage sense signal；

Whether infrared circuit, is arranged on oven body itself, sends IR and according to IR by splash pan Reflect to export infrared detection signal；

Logic gates, is coupled to voltage detecting circuit with receiving voltage detection signal, and be coupled to infrared circuit To receive infrared detection signal, by voltage detection signal and infrared detection signal and rear output control signal；

On-off circuit, is coupled to logic gates to receive control signal, and in response to control signal with break-make；

When heating wire is powered, if infrared circuit is not detected by the IR that splash pan is reflected, switch Circuit disconnects cutting off the current supply circuit of heating wire in response to control signal now.

Using above-mentioned technical proposal, voltage detecting circuit is coupled to heating wire to detect whether heating wire is powered, and defeated Go out corresponding detection signal;Infrared circuit launches IR to splash pan and to detect whether splash pan reflects infrared Light, according to whether detect splash pan to reflect IR to judge whether splash pan in mounted position and exports Corresponding infrared detection signal；When voltage detecting circuit be not detected by heating wire it is powered when, because logic gates examines voltage Survey signal and infrared detection signal phase and the then detection case regardless of infrared circuit, electric oven can be carried out tieing up Shield and cleaning；When voltage detecting circuit detect heating wire it is powered when, if infrared circuit detects splash pan and is disassembled, Gate exports corresponding control signal and makes on-off circuit disconnect to cut off the power supply of heating wire current supply circuit；By in heating wire Detect whether splash pan is dismantled and the power supply of heating wire current supply circuit is automatically cut off if splash pan is dismantled when powered, it is to avoid Powered heating wire is touched when splash pan clean and maintenance oven is dismantled, guarantee is brought to the life security of user.

Preferably, also including being coupled to on-off circuit and electricity of warning in response to the break-make of on-off circuit to be warned Road.

Using above-mentioned technical proposal, when heating wire is powered, if now dismounting splash pan carries out the maintenance and cleaning of oven, Then user easily touches powered heating wire generation electric shock accidents, although can dismantle splash pan in the case of heating wire is powered When automatically cut off the power supply of heating wire, but the total power switch of electric oven is still not turned off, and on-off circuit rhizoma nelumbinis is warned After circuit, can in this case through warn prompting people go close electric oven power supply, such user dismounting, Safeguard, clean an electric oven completely with out electricity, life security is more secure.

Preferably, the infrared circuit is included for sending the light radiating circuit of IR and for receiving The light receiver circuit of IR, the light receiver circuit are according to whether receive the IR of splash pan reflection with defeated Go out infrared detection signal.

Using above-mentioned technical proposal, light radiating circuit sends IR towards splash pan, when splash pan is installed on electricity When in oven, splash pan just reflects back IR, and it is infrared that light receiver electric circuit inspection to splash pan is reflected Light simultaneously exports infrared detection signal corresponding with the state, and when being taken out after splash pan is disassembled, light radiating circuit sends IR cannot be reflected back by splash pan, light detect electric circuit inspection less than splash pan reflect and return IR enter And the corresponding infrared detection signal of another state is exported, so infrared circuit can reflect with according to whether detecting splash pan The IR returned determines whether splash pan is disassembled, and circuit structure is simple, strong antijamming capability, and detection is accurate.

Preferably, the light receiver circuit includes for detecting light intensity and exporting detection signal according to light intensity Test section and be coupled to test section to receive the comparing section of detection signal, the comparing section has and datum ray intensity pair The reference signal answered, the comparing section benchmark signal with the size of detection signal exporting infrared detection signal.

Using above-mentioned technical proposal, test section is used to detecting the light intensity that splash pan reflects and exports reflection light The detection signal of intensity, but be not that the intensity of ordinary ray can also make light test section error detection have received splash pan The light that the light radiating circuit for reflecting and returning sends, so comparing section has reference signal corresponding with datum ray intensity, With the size of reference signal be compared the size of detection signal by comparing section, when there is the IR more than datum ray intensity During through coming, the size of the size more than reference signal of detection signal, only now comparing section just exports corresponding infrared inspection Signal is surveyed, so as to avoid the interference of sunlight and some other light, makes detection more accurate.

Preferably, the circuit of warning is for audible alarm circuit.

Using above-mentioned technical proposal, people are reminded to go to close electric oven power supply, prompting mode by way of audible alarm Substantially, as long as user hears that prompting may know that needs go to close electric oven power supply within the specific limits, more facilitate.

Preferably, the on-off circuit is transistor switching circuit.

Using above-mentioned technical proposal, transistor switching circuit does not have movable contact partly, therefore does not have the worry of abrasion, Can be fast using the unlimited switch that repeatedly, the responsiveness of transistor switching circuit is more general, the opening and closing time of general switch is Calculated with millisecond, and transistor switching circuit is then with microsecond meter, transistor switching circuit is not quivered phenomenon, using three poles Pipe on-off circuit is driven during inductive load, in the moment of switch open, does not have spark generation, safer.

Preferably, the comparing section is comparator circuit.

Using above-mentioned technical proposal, comparator circuit simple structure, component are cheap, easy to maintenance, and easily real The benchmark value signal now stablized, the result stabilization of the rear output compared, strong antijamming capability, the signal noise of output is few, accurate.

In sum, the utility model has the advantages that：

1. when heating wire is powered, the electricity of heating wire current supply circuit is automatically cut off if user's dismounting splash pan is detected Source, it is to avoid user cleans and touched when safeguarding electric oven exposed heating wire and gets an electric shock, and gives people with safety guarantee；

2. it is roasting to point out people to close electricity by circuit of warning to send alarm while heating wire current supply circuit is cut off The general supply of stove, it is safer so as to allow user to carry out clean and maintenance after closing general supply；

3. additionally, when splash pan loosens and leaves installation site, on-off circuit can also cut off the power supply of heating wire, while alert Show circuit alarm, it is to avoid splash pan loosens the safety problem for causing；

4. whole circuit structure is simple, and component is cheap, and cost is relatively low and easy to maintenance, additionally, detection is accurate, no The situation of wrong report occurs.

Brief description of the drawings

Fig. 1 is structural representation of the present utility model；

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

In figure：1st, infrared circuit；11st, light radiating circuit；12nd, light receiver circuit；121st, test section；122nd, compare Compared with portion；2nd, voltage detecting circuit；3rd, logic gates；4th, on-off circuit；5th, warn circuit；6th, oven body itself；7th, splash pan.

Specific embodiment

Below in conjunction with the accompanying drawings and embodiment, the utility model is described in detail.

A kind of electric oven, reference picture 1 and Fig. 2, including oven body itself 6 and splash pan 7, splash pan 7 and oven body itself 6 Sliding connection, sliding connection can directly be slided for splash pan 7 on oven body itself 6, and be preferably in oven in the present embodiment Body 6 is provided with slide rail, and splash pan 7 is in the enterprising line slip of slide rail, and frictional resistance is smaller；Additionally, being provided with electric heating in oven body itself 6 Silk, electric oven is toasted by heating wire heating power.

Reference picture 1 and Fig. 2, electric oven also include voltage detecting circuit 2, infrared circuit 1, logic gates 3, open Powered-down road 4 and circuit 5 of warning, when voltage detecting circuit 2 detect heating wire it is powered when, if now infrared circuit 1 is examined Measure splash pan 7 to be removed, then the controlling switch circuit 4 of logic gates 3 disconnects, so as to cut off the electricity of circuit where heating wire Source, it is to avoid touch powered and exposed heating wire and get an electric shock, it is safer；Additionally, circuit 5 of warning is in response to on-off circuit 4 Start to warn and then notify that people need the general supply for going to close electric oven manually.

Reference picture 2, voltage detecting circuit 2 is used to detect whether heating wire is powered and detected according to detection case output voltage Signal, specific circuit is connected as：

Power supply circuit where heating wire includes switch SB, fuse FU, switch KM1-1 and heating wire R, wherein, open The one end for closing SB is connected to power supply, and the other end is grounded after being sequentially connected in series fuse FU, switch KM1-1, heating wire R；

The base stage of triode VT1, the resistance R5 of voltage detecting circuit 2 including NPN type, wherein triode VT1 is connected to molten The tie point of disconnected device FU and switch KM1-1, the colelctor electrode voltage sense signal of triode VT1, while the collection of triode VT1 Power supply, the grounded emitter of triode VT1 are connected to after Electrode Series Resistance R5.

Reference picture 2, infrared circuit 1 is arranged at the side that oven body itself 6 skids off direction perpendicular to splash pan 7, is receiving When food tray 7 is installed, end fire IR from infrared circuit 1 to the inner end of splash pan 7, infrared detection electricity Road 1 includes the light radiating circuit 11 and the light receiver circuit 12 for receiving IR for sending IR, Light radiating circuit 11 is arranged on oven body itself 6 and launches IR to splash pan 7, and light receiver circuit 12 is also disposed at On oven body itself 6 and it is close to light radiating circuit 11 and sets, light receiver circuit 12 is included for detecting light intensity and basis Light intensity exports the test section 121 of detection signal and is coupled to test section 121 to receive the comparing section 122 of detection signal, Comparing section 122 has reference signal corresponding with datum ray intensity, and comparing section 122 compares base detection signal with reference signal To export infrared detection signal, the specific circuit of infrared circuit 1 is connected as size

Light radiating circuit 11 includes light emitting diode D and resistance R1, and one end of wherein light emitting diode D is connected to electricity It is grounded behind source and other end series resistance R1；

Test section 121 includes photosensitive triode VT, resistance R3, wherein the colelctor electrode of photosensitive triode VT is connected to power supply, The emitter stage output detection signal of photosensitive triode VT and simultaneously ground connection after series resistance R3；

Comparing section 122 includes comparator U1, resistance R2, resistance R4, and one end of wherein resistance R2 is connected to power supply, resistance R2 The other end be connected to the inverting input of comparator U1, the inverting input of comparator U1 is grounded after series resistance R4 simultaneously, The in-phase input end of comparator U1 is connected to the emitter stage of photosensitive triode VT to receive detection signal, the output end of comparator U1 Output infrared detection signal.

Reference picture 2, logic gates 3 include with door, wherein with the input of door be connected to the output end of comparator U1 with Infrared detection signal is received, with the colelctor electrode that another input of door is connected to triode VT1 with receiving voltage detection signal, with The output end output control signal of door.

Reference picture 2, on-off circuit 4 is transistor switching circuit, and physical circuit is connected as：

Triode VT2, resistance R6 including NPN type, relay KM1, diode D1, wherein, the base stage of triode VT2 connects The output end with door is connected to receive control signal, while power supply is connected to after the base series resistor R6 of triode VT1, three poles The colelctor electrode of pipe VT2 is connected to power supply, is grounded after the emitter stage SRE KM1 of triode VT2, the transmitting of triode VT2 Pole is connected to the negative electrode of diode D1, the plus earth of diode D1.

Reference picture 1 and Fig. 2, on-off circuit 4 have been also coupled to circuit 5 of warning, and circuit 5 of warning is audible alarm circuit, sound Sound warning circuit sends sound and is warned in response to the control of on-off circuit 4, and specific circuit is connected as：

Including resistance R7, switch KM1-2 and electric bell SP, one end of wherein resistance R7 is connected to power supply, and resistance R7's is another One end is grounded after being sequentially connected in series switch KM1-2, electric bell SP.

The above is only preferred embodiment of the present utility model, and protection domain of the present utility model is not limited merely to Above-described embodiment, all technical schemes belonged under the utility model thinking belong to protection domain of the present utility model.Should refer to Go out, for those skilled in the art, some improvement under the premise of the utility model principle is not departed from and Retouching, these improvements and modifications also should be regarded as protection domain of the present utility model.

Claims (7)

1. a kind of electric oven, including oven body itself (6) and the splash pan (7) being connected with oven body itself (6) sliding, the oven Heating wire is provided with body (6), it is characterized in that：Also include

Voltage detecting circuit (2), for detecting whether heating wire is powered with voltage sense signal；

Whether infrared circuit (1), is arranged on oven body itself (6), sends IR and is received oil according to IR Disk (7) reflects to export infrared detection signal；

Logic gates (3), is coupled to voltage detecting circuit (2) with receiving voltage detection signal, and is coupled to infrared detection electricity Road (1) to receive infrared detection signal, by voltage detection signal and infrared detection signal and rear output control signal；

On-off circuit (4), is coupled to logic gates (3) to receive control signal, and in response to control signal with break-make；

When heating wire is powered, if infrared circuit (1) is not detected by the IR that splash pan (7) is reflected, open Powered-down road (4) disconnects cutting off the current supply circuit of heating wire in response to control signal now.

2. electric oven according to claim 1, it is characterized in that：Also include being coupled to on-off circuit (4) and in response to switch Warn circuit (5) of the break-make of circuit (4) to be warned.

3. electric oven according to claim 1, it is characterized in that：The infrared circuit (1) is including infrared for sending The light radiating circuit (11) of light and the light receiver circuit (12) for receiving IR, the light receiver circuit (12) according to whether receiving the IR of splash pan (7) reflection to export infrared detection signal.

4. electric oven according to claim 3, it is characterized in that：The light receiver circuit (12) is including for detecting light Intensity simultaneously exports the test section (121) of detection signal and is coupled to test section (121) to receive detection letter according to light intensity Number comparing section (122), the comparing section (122) is with reference signal corresponding with datum ray intensity, the comparing section (122) benchmark signal with the size of detection signal exporting infrared detection signal.

5. electric oven according to claim 2, it is characterized in that：The circuit of warning (5) is audible alarm circuit.

6. electric oven according to claim 1, it is characterized in that：The on-off circuit (4) is transistor switching circuit.

7. electric oven according to claim 4, it is characterized in that：The comparing section (122) is comparator circuit.