CN208808236U - Heating pipe and electric oven - Google Patents

Abstract

The utility model belongs to the technical field of the heater block, a heating pipe is disclosed, including four independent heating pipes, and four independent heating pipes and from inside to outside are first heating pipe, second heating pipe, third heating pipe and fourth heating pipe respectively. Still disclose an electric oven, including heating module, heated air circulation module, exhaust module and temperature control module, heating module includes heating pipe, back heating pipe and bottom heating pipe, and the heating pipe setting is on the inside roof of electric oven. The heating pipe is characterized in that the four independent heating pipes with different powers are arranged from inside to outside, one or more of the four independent heating pipes are controlled to be opened or closed, so that the appearance of a thermal field dead angle in the electric oven can be effectively reduced, the thermal field in the electric oven is uniform, and the accurate baking of food materials is realized.

Description

A kind of heating tube and electric oven

Technical field

The utility model relates to heating element technical field more particularly to a kind of heating tube and electric ovens.

Background technique

The common configuration of built-in type oven is that inside and outside two heating tubes, lower part, each cloth in back are arranged at the top of oven at this stage A heating tube, oven top layout cooling fan are set, thermal circulation fan is arranged at oven back.It is generated by thermal circulation fan Air-flow recycles the hot-air inside oven.The temperature that certain point in oven is acquired by NTC temp probe, is calculated with PID Method controls the on-off of heating tube, and then achievees the effect that be heated evenly.But due to the invariablenes turning speed of back thermal circulation fan, make Obtaining oven hot inside air can only have the constant speed in a direction to recycle, and lead to the circulation dead angle for generating hot-air.And above-mentioned knot Structure makes door body nearby and the temperature near heat release hole is difficult to keep consistent with other positions.And in top outside heating tube and top Heating tube causes heat to be difficult to be recycled to each corner of oven, so that from heating because power problem can not be opened simultaneously It is relatively low to manage slightly remote position temperature.

Also some ovens increase the quantity of NTC temp probe, while measuring the temperature of multiple spot inside oven.Pass through compensation Algorithm makes thermal field inside oven reach a metastable value.But this mode can only optimize the thermal field under existing structure, nothing Method solves the problems, such as thermal field unevenness.

Also some ovens increase airflow circulating area by changing inner-tube structure, but this mode can not thoroughly solve certain The thermal field dead angle of a little positions.And changing structure can be such that technology difficulty increases, and significantly increase product cost.

Utility model content

The purpose of this utility model is to provide a kind of heating tube and electric oven, it is dead that there are thermal fields to solve existing oven Angle leads to the problem of thermal field unevenness.

For this purpose, the utility model uses following technical scheme:

A kind of heating tube, including four independent heating pipes, and four independent heating pipes and from inside to outside be respectively first plus Heat pipe, the second heating tube, third heating tube and the 4th heating tube.

The structure setting preferably, body portion of first heating tube is in U-shape, the tube body of second heating tube Divide wavy structure setting, the body portion of the third heating tube is in M shape structure setting, the pipe of the four or three heating tube Body portion setting in rectangular configuration.

Preferably, the heating power of first heating tube, the second heating tube, the 4th heating tube and third heating tube It is sequentially increased.

The utility model also provides a kind of electric oven, including heating module, hot air circulation module, air draft module and temperature Control module, the heating module include above-mentioned heating tube, back heating tube and bottom-heated pipe, the heating tube setting On the roof inside the electric oven, the back heating tube is arranged on the rear wall inside the electric oven, the bottom Portion's heating tube is arranged on the bottom wall inside the electric oven.

Preferably, the hot air circulation module includes the first motor with cup rotor being arranged in inside the electric oven, connection In the flabellum of the first motor with cup rotor output end, and the bull capacitor of electrical connection first motor with cup rotor.

Preferably, the air draft module includes the gas vent being provided on the electric oven roof, it is connected to the row Second motor with cup rotor of stomata, and the wind deflector positioned at the second motor with cup rotor input end.

Preferably, the gas vent is placed in the middle position of the tube body of the M shape structure of the third heating tube.

The above-mentioned heating tube of the utility model by setting four from inside to outside and the independent heating pipe that is all different of power, By the opening and closing of control one or more of four independent heating pipes, going out for thermal field dead angle in electric oven can be effectively reduced It is existing, so that the thermal field in electric oven is uniform, realize the accurate baking to food materials.

The above-mentioned electric oven of the utility model, can be in the premise for not changing whole size by the way that above-mentioned heating tube is arranged Under, it realizes the accurate control to thermal field, has effectively saved cost.And it is opened by each heating tube in control and heating module processed The frequency of conjunction and the first motor with cup rotor, can be effectively ensured the equilibrium of electric oven temperature, optimize the cured effect of electric oven.

The second motor with cup rotor, back heating tube, the first heating tube and third heating tube are opened, in temperature-rise period with most The operation of high-power and maximum quantity of wind, is able to ascend preheating speed.Relatively small power and air quantity are then used during baking Guarantee while maturation, the moisture in food materials will not be excessively lost.By the above-mentioned means, the accurate baking to food materials can be reached It is roasting.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model heating tube；

Fig. 2 is the main view of the utility model electric oven；

Fig. 3 is the top view of the utility model electric oven；

Fig. 4 is the structural schematic diagram that heating tube is shown at the top of the utility model electric oven；

Fig. 5 is the control principle schematic diagram of the utility model electric oven；

Fig. 6 is the flow chart of the control method of the utility model electric oven.

In figure:

1, the first heating tube；2, the second heating tube；3, third heating tube；4, the 4th heating tube；5, fixed bracket；6, fixed Bar；

10, back heating tube；20, bottom-heated pipe；30, relay；40, the first motor with cup rotor；50, bull capacitor；60, Gas vent；70, the second motor with cup rotor；80, wind deflector；90, single-chip microcontroller；100, NTC temp probe.

Specific embodiment

Further illustrate the technical solution of the utility model below with reference to the accompanying drawings and specific embodiments.

The utility model provides a kind of heating tube, as shown in Figure 1, the heating tube includes four independent heating pipes, and four Independent heating pipe and from inside to outside be respectively the first heating tube 1, the second heating tube 2, third heating tube 3 and the 4th heating tube 4, Above-mentioned first heating tube 1, the second heating tube 2, third heating tube 3 and the 4th heating tube 4 power be all different.

Referring to Fig.1, one end of aforementioned four independent heating pipe passes through fixed bracket 5 and connects, above-mentioned second heating tube, 2 He It is connected between 4th heating tube 4 by fixed link 6, fixed link 6 is specifically welded on the second heating tube 2 by way of spot welding In the 4th heating tube 4, the supporting role to the second heating tube 2 and the 4th heating tube 4 is played.Above-mentioned third heating tube 3 and It is connected between four heating tubes 4 also by fixed link 6, fixed link 6 is welded on third heating tube 3 and the 4th by way of spot welding In heating tube 4, the supporting role to third heating tube 3 and the 4th heating tube 4 is played.

Be in U-shape the body portion (main portions for playing heat effect) of above-mentioned first heating tube 1 structure setting, and power is most It is small, preferably use 200W in the present embodiment, and in first heating tube 1 is wrapped in by the second heating tube 2.

The wavy structure setting of body portion of above-mentioned second heating tube 2, above-mentioned 5 points of fixed bracket are welded in the waveform In structure, in the present embodiment, the power of second heating tube 2 is 1100W.

The body portion of above-mentioned third heating tube 3 is in M shape structure setting, and the third heating tube 3 is wrapped up above-mentioned second and added Heat pipe 2 is arranged, and by the setting of the body portion of M shape structure, so that the heating surface (area) (HS of third heating tube 3 is bigger, and then works as and answers When using in electric oven, the appearance at thermal field dead angle in electric oven can be reduced.In the present embodiment, the function of above-mentioned third heating tube 3 Rate is 1200W.

The body portion setting in rectangular configuration of above-mentioned 4th heating tube 4 is located at outermost and wraps up third heating tube 3 Setting.In the present embodiment, the power of above-mentioned 4th heating tube 4 is 1000W.

The utility model also provides a kind of electric oven, and as in Figure 2-4, which includes heating module, hot air circulation Module, air draft module and temperature control modules, in which:

Heating module includes above-mentioned heating tube, back heating tube 10 and bottom-heated pipe 20, and wherein heating tube is arranged On the roof inside electric oven, back heating tube 10 is arranged on the rear wall inside electric oven, and bottom-heated pipe 20 is arranged On the bottom wall inside electric oven, above-mentioned each heating tube generates heat by internal resistance silk, leads to the hot spoke of external stainless steel tube It penetrates and provides heat for electric oven inside.In the present embodiment, the power of above-mentioned back heating tube 10 is 2000W, bottom-heated pipe 20 Power be 1100W.In order to ensure the general power of electric oven is not too big, the first heating tube 1, second of above-mentioned heating tube is heated Pipe 2, third heating tube 3 and the 4th heating tube 4 cannot open simultaneously, and total heating power of the independent heating pipe of unlatching should not surpass Cross 2400W.And the total work for each heating tube (including heating tube, back heating tube 10 and bottom-heated pipe 20) that electric oven is opened 3500W is not to be exceeded in rate.The first heating tube 1, the second heating tube 2, third heating tube 3 and the 4th heating tube 4 of above-mentioned heating tube, Back heating tube 10 and bottom-heated pipe 20 are connected to temperature control modules (shown in Fig. 5) by relay 30 respectively, pass through Temperature control modules control the on-off of relay 30, to realize that the opening and closing to each heating tube controls.

In the present embodiment, it is preferred that as shown in figure 4, the 4th heating tube 4 of above-mentioned heating tube is close to the one of electric oven door body The distance L1 of lateral extent electric oven door body is minimum, and the distance of other lateral extent electric oven side walls of the 4th heating tube 4 is L2, and L2 Greater than L1.It is arranged with this configuration, temperature when can compensate for and improving electric oven baking at the position of door body, so that electric Temperature Distribution inside oven is more uniform.

Above-mentioned hot air circulation module includes the first motor with cup rotor 40 being arranged in inside electric oven, is connected to the first split-pole electricity The flabellum (not shown) of 40 output end of machine, and the bull capacitor 50 of the first motor with cup rotor 40 of electrical connection.In the present embodiment, Above-mentioned first motor with cup rotor 40 is for realizing the forced convertion of the hot-air inside electric oven, 40 band of specifically the first motor with cup rotor Dynamic flabellum rotation, flabellum then disturb the hot-air inside electric oven, form convection current, realize the following in electric oven of hot-air Ring.

Above-mentioned bull capacitor 50 is connected to temperature control modules, is controlled by temperature control modules and changes bull capacitor 50 Tap can change the input voltage of the first motor with cup rotor 40, and then change the revolving speed of the first motor with cup rotor 40, and then change heat The circulation rate of air.In the present embodiment, above-mentioned bull capacitor 50 enables to the first motor with cup rotor 40 tool, and there are three input electricity Pressure, the revolving speed of corresponding first motor with cup rotor 40 also there are three, specially 800rpm, 1200rpm, 2000rpm.

Said exhaust module includes the gas vent 60 being provided on electric oven roof, is connected to the second split-pole of gas vent 60 Motor 70, and the wind deflector 80 positioned at 70 input end of the second motor with cup rotor.The third heating tube 3M shape knot of above-mentioned heating tube The tube body of structure enables to gas vent 60 to be placed in the middle position of the tube body of the M shape structure, i.e., by by third heating tube 3 Shaft design be M shape structure, enable to third heating tube 3 to avoid the position of gas vent 60, prevent temperature at gas vent 60 It is excessively high, influence the use of electric oven.

Above-mentioned second motor with cup rotor 70 is used to play the role of adjusting heat dissipation moisture to the air draft inside electric oven, Second motor with cup rotor 70 is connected to temperature control modules by relay 30, controls relay 30 by temperature control modules, comes Control the opening and closing of the second motor with cup rotor 70.In the present embodiment, the invariablenes turning speed of the second motor with cup rotor 70 is 2300rpm.

There are two the above-mentioned settings of wind deflector 80, and the two sides of the input terminal of the second motor with cup rotor 70 are symmetrically arranged in, are used for During air draft, the flow direction of hot-air is oriented to.Preferably, above-mentioned two wind deflector 80 is obliquely installed, and two are led Aerofoil 80 is close to the distance between one end of the second motor with cup rotor 70, and less than two wind deflectors 80 are far from the second motor with cup rotor 70 The distance between one end.

Above-mentioned temperature control modules include single-chip microcontroller 90 and the NTC temp probe 100 for being connected to single-chip microcontroller 90, wherein NTC temp probe 100 is used to acquire temperature in electric oven, and temperature data is passed to single-chip microcontroller 90, the then root of single-chip microcontroller 90 According to received temperature data, each heating tube of above-mentioned heating module, the first motor with cup rotor 40 of hot air circulation module and more are controlled Head capacitor 50, air draft module the second motor with cup rotor 70 working sequence, to realize to the equal control of temperature in electric oven, into And reach optimal cured effect.

The utility model also provides a kind of control method of above-mentioned electric oven, and specifically control baking process enters preheating rank Section bakes at least one stage in stage and equal thermophase, can refer to Fig. 5, the control method specifically includes the following steps:

S10: entering warm-up phase, opens the second motor with cup rotor 70, back heating tube 10, the first heating tube 1 and third Heating tube 3 closes remaining heating tube, and runs the first motor with cup rotor 40 with the first revolving speed.

In the present embodiment, above-mentioned second motor with cup rotor 70 is in operating status always after electric oven unlatching, for radiating, And after entire baking process, above-mentioned second motor with cup rotor 70 can also work a period of time, until temperature drop in electric oven It can just be closed to 60 DEG C or less, to achieve the purpose that accelerate the cooling rate of electric oven.

After entering warm-up phase, back heating tube 10, the first heating tube 1 and third being arranged at the top of electric oven are opened Heating tube 3 all closes bottom-heated pipe 20 and the second heating tube 2, the 4th heating tube 4, can meet permission at this time Under power rating, so that heating heat reaches maximum.The first split-pole blower is run (particular by adjusting with the first revolving speed simultaneously The tap of bull capacitor 50 realizes the first revolving speed), in the present embodiment, the first revolving speed is 2000rpm, i.e. the first motor with cup rotor 40 Maximum (top) speed.It is rotated by the first motor with cup rotor 40 with maximum (top) speed, the back heating tube 10, first opened is enabled to heat Pipe 1 and the heat of third heating tube 3 radiate rapidly each position in electric oven, simultaneously as at this time without food, without Worry that moisture can be largely lost.Temperature in warm-up phase, electric oven is constantly in ascent stage, therefore every 1min carries out one Secondary pid algorithm temperature control, main purpose are to make the waveform of thermal field more stable when secondary undulation at the beginning of temperature.Specifically, above-mentioned The mode of pid algorithm temperature control is as follows: i.e. by the temperature in 100 real-time detection electric oven of NTC temp probe, and passing through single-chip microcontroller 90 calculate the difference between the temperature in the preset temperature and electric oven that NTC temp probe 100 detects in real time, due in heating In the stage, the temperature in electric oven is less than preset temperature, when the difference between the temperature in preset temperature and electric oven is less than first When set temperature value (the first set temperature value is 5 DEG C in the present embodiment), then back heating tube is persistently controlled by pid algorithm 10, the first heating tube 1 and third heating tube 3 heat up, when the difference between the temperature in preset temperature and electric oven is greater than When equal to the first set temperature value, judges to toast whether remaining time is zero, if baking remaining time is zero, directly terminate Baking process completes baking.

If baking remaining time portion is not zero, judge to toast whether remaining time is greater than setting time (this implementation Example setting time is 5 minutes), if baking remaining time is more than or equal to setting time, enter the baking stage；If baking When remaining time is less than setting time, then enter equal thermophase.

S20: entering the baking stage, opens the second motor with cup rotor 70, bottom-heated pipe 20, third heating tube 3 and the 4th Heating tube 4 closes remaining heating tube, and runs the first motor with cup rotor 40 with the second revolving speed.

It is more than or equal to setting time when baking remaining time, into after the baking stage, the baking stage is the master of food maturation The stage is wanted, needs accurate temperature control at this time, i.e., every the pid algorithm temperature control of progress in 30 seconds.In order to preferably realize to food materials Baking is opened the second motor with cup rotor 70, bottom-heated pipe 20, third heating tube 3 and the 4th heating tube 4 in the stage of baking, is closed Close remaining heating tube, opening third heating tube 3 is because in the food temperature rise period, and third heating tube 3 being capable of slow uniform spoke Heat is penetrated, guarantees the maturation of food.At this time in order to save the moisture inside food materials, the second revolving speed of the first motor with cup rotor 40 is 1200rpm。

In this step, if the difference between temperature in preset temperature and electric oven is more than or equal to the second set temperature value When (the second set temperature value of the present embodiment is 3 DEG C), the first heating tube 1 is opened at this time, and the first heating tube 1 is the small of additional heat Power heating tube, power only have 200W, this stage is used as additional heat during accurate temperature control.When judging to toast residue simultaneously Between whether be zero, if baking remaining time be zero, directly terminate baking process, that is, complete baking.If baking is remaining Between portion be not zero, continue to judge to toast whether remaining time is greater than setting time (the present embodiment setting time is 5 minute), if When toasting remaining time more than or equal to setting time, then continue the baking stage；If toast remaining time less than setting time, Then enter equal thermophase.

If the difference between temperature in preset temperature and electric oven does not need to open less than the second set temperature value First heating tube 1 first judges to toast whether remaining time is zero at this time, if baking remaining time is zero, directly terminates to dry Roasted journey completes baking.If baking remaining time portion is not zero, when continuing to judge whether toast remaining time is greater than setting Between (the present embodiment setting time be 5 minutes) continue to bake rank if baking remaining time is more than or equal to setting time Section；If toast remaining time less than setting time, enter equal thermophase.

S30: entering equal thermophase, opens the second motor with cup rotor 70, bottom-heated pipe 20, the second heating tube 2 and the 4th Heating tube 4 closes remaining heating tube, and runs the first motor with cup rotor 40 with third revolving speed.

The equal thermophase is the colouring stage, specifically, be to bake crackling on food materials surface, at this time the second motor with cup rotor 70, Bottom-heated pipe 20, the second heating tube 2 and the 4th heating tube 4, close remaining heating tube.Open the purpose of the second heating tube 2 Be because its wavy shaped configuration tube body can quick radiations heat energy, achieve the purpose that rapid burned food materials surface.First cover The third revolving speed of pole motor 40 is 800rpm.

In the equal thermophase, when the difference between the temperature in preset temperature and electric oven is more than or equal to third set temperature When value (in the present embodiment, third set temperature value is 5 DEG C), add in the second motor with cup rotor 70 of unlatching, bottom-heated pipe 20, second While heat pipe 2 and the 4th heating tube 4, the first heating tube 1 is opened, is used as additional heat during accurate temperature control.And sentence Whether disconnected baking remaining time is zero, if baking remaining time is zero, terminates baking process, that is, completes baking.If dried Roasting remaining time portion is not zero, then continues equal thermophase.

In the equal thermophase, when the difference between the temperature in preset temperature and electric oven is less than third set temperature value When (in the present embodiment, third set temperature value is 5 DEG C), then do not need to open the first heating tube 1, when judgement baking at this time is remaining Between whether be zero, if baking remaining time be zero, terminate baking process, that is, complete baking.If toasting remaining time portion It is not zero, then repeats to judge whether the difference between the temperature in preset temperature and electric oven is more than or equal to third set temperature Value, and the operation after judging is repeated, until remaining time is zero, terminate baking process.

It by the above three stage, enables to food materials in entire baking process, reaches optimal cured effect, and energy It is enough that specific food materials (such as meat food materials) are more accurately controlled.

Obviously, the above embodiments of the present invention is used for the purpose of clearly illustrating examples for clearly illustrating the present invention, and It is not limitations of the embodiments of the present invention.For those of ordinary skill in the art, in above description On the basis of can also make other variations or changes in different ways.There is no need and unable to give all embodiments Exhaustion.Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention etc., should be included in Within the protection scope of the utility model claims.

Claims (6)

1. a kind of heating tube, which is characterized in that including four independent heating pipes, and four independent heating pipes and distinguish from inside to outside For the first heating tube (1), the second heating tube (2), third heating tube (3) and the 4th heating tube (4)；First heating tube (1) body portion is in U-shape structure setting, the wavy structure setting of body portion of second heating tube (2), and described The body portion of three heating tubes (3) is in M shape structure setting, the body portion setting in rectangular configuration of the 4th heating tube.

2. heating tube according to claim 1, which is characterized in that first heating tube (1), the second heating tube (2), The heating power of four heating tubes (4) and third heating tube (3) is sequentially increased.

3. a kind of electric oven, including heating module, hot air circulation module, air draft module and temperature control modules, feature exist In the heating module includes claim 1-2 any heating tube, back heating tube (10) and the bottom-heated pipe (20), the heating tube is arranged on the roof inside the electric oven, and back heating tube (10) setting is roasting in the electricity On rear wall inside case, the bottom-heated pipe (20) is arranged on the bottom wall inside the electric oven.

4. electric oven according to claim 3, which is characterized in that the hot air circulation module includes that setting is roasting in the electricity The first motor with cup rotor (40) inside case is connected to the flabellum of the first motor with cup rotor (40) output end, and electrical connection institute State the bull capacitor (50) of the first motor with cup rotor (40).

5. electric oven according to claim 3, which is characterized in that the air draft module includes being provided with the electric oven top Gas vent (60) on wall is connected to the second motor with cup rotor (70) of the gas vent (60), and is located at second split-pole The wind deflector (80) of motor (70) input end.

6. electric oven according to claim 5, which is characterized in that the gas vent (60) is placed in the third heating tube (3) middle position of the tube body of M shape structure.