But a kind of electric cooker of additional heat
Technical field
The utility model relates to electric cooker, and particularly a kind of electric cooker that in cooking process, can pass through hot-air system additional heat in pot body belong to the improvement technology to electric cooker.
Background technology
Existing computermatic electric cooker in order to realize the three-dimensional evenly heating to rice, except bottom heater and side heater, also is provided with the less loam cake heater of heating power last covering.In the process of cooking, in order to increase the fragrance of rice, generally be provided with the link of cooking rice over a slow fire, promote the evaporation of rice surface moisture.In the link of cooking rice over a slow fire, only open bottom heater usually and heat, and the link of seething with excitement this moment has been accomplished; Moisture in the rice is less; Can't carry out three-dimensional heat make-up heat through moisture mobile, therefore, especially for the rice amount; The heat on rice upper strata is obviously not enough, causes upper strata rice gelatinization not enough.When generally having a meal all in the pot upper surface of rice eat, if gelatinization is not enough, even the nice first impression that also influences of lower floor.
For above-mentioned this situation, if prolong the time of cooking rice over a slow fire, can need longer cooking the time, waste energy simultaneously; As increase the heating power of bottom heater, because the moisture in the rice is few, bottom rice is burnt; As open the loam cake heater and heat, because the loam cake heater need lead to peraluminous cover plate the air above the rice is carried out the heat conduction, considerably less to the acting heat of rice; And the power of increase loam cake heater, then to causing the too high potential safety hazard that exists of loam cake working of plastics temperature rise.
Summary of the invention
The purpose of the utility model is to overcome above-mentioned shortcoming; A kind of electric cooker that can in cooking process, pass through hot-air system additional heat in pot body is provided; Can avoid cooking rice over a slow fire in the prior art link rice top shortage of heat, defective that gelatinization degree is not enough need not increase the power of the time of cooking rice over a slow fire and loam cake heater, energy savings again; Also avoided the too high problem of loam cake temperature rise, simple in structure, safe in utilization.
The technical scheme that realizes the utility model purpose is: but a kind of electric cooker of additional heat; Comprise cover assembly, with the hinged pot body assembly of cover assembly, place the interior pot of pot body assembly; It is characterized in that, be provided with the hot-air system and the hot blast air outlet of air inlet, inside pot additional heat in the cover assembly.
Above-mentioned hot-air system comprises vortex flow fan, tube connector (preferably silica gel sleeve pipe), heater and the wind pipe that connects successively, and the end port of wind pipe is corresponding with above-mentioned hot blast air outlet.
Above-mentioned cover assembly comprises cover, be fixed on the cover below inner cap, be fixed on the inner cap below the insulation seat board, be fixed on the anti-overflow cover plate of insulation seat board below and be fixed on the steam valve that is used for exhaust steam on the cover; Said hot blast air outlet is located on the anti-overflow cover plate, and vortex flow fan and heater are fixed on inner cap or the insulation seat board.Above-mentioned heater is fixed on the insulation seat board through pressing plate, is provided with insulator between heater and the pressing plate, for example mica sheet.
The air inlet of above-mentioned hot-air system is arranged on the hinge connection between cover assembly and pot body assembly, perhaps is arranged on the cover.
The cross-sectional area of above-mentioned hot blast air outlet is designed to the cross-sectional area less than wind pipe, to improve hot blast air-out speed.
Above-mentioned heater is preferably ptc heater.
Above-mentioned heater design is a pipeline type, and this pipeline connects tube connector and wind pipe.Above-mentioned heater is directly connected to the hot blast air outlet.
Above-mentioned wind pipe is a copper pipe, and is fixing with the heater welding.
The surface of above-mentioned wind pipe is surrounded by insulation material or heat-barrier material, for example heat-preservation cotton.
Above-mentioned wind pipe is configured to the higher position of relative heater, and the hot blast air outlet is designed to aperture, overflows from hot-air system to prevent steam and thin rice gruel.
The beneficial effect of the utility model is, because the employing hot-air system carries out heat supplement to the food in the inner pan of electric cooker, especially in the link of cooking rice over a slow fire; The link rice top shortage of heat of cooking rice over a slow fire in the prior art, defective that gelatinization degree is not enough had both been remedied; Need not increase the power of cook rice over a slow fire time and loam cake heater of the prior art again, energy savings has been avoided the too high problem of loam cake temperature rise; And it is simple in structure, safe in utilization.
Description of drawings
Fig. 1 is the overall perspective view of cover assembly in the utility model electric cooker;
Fig. 2 is that cover assembly removes the internal structure sketch map behind the cover in the utility model electric cooker;
Fig. 3 is the A-A cutaway view among Fig. 2;
Fig. 4 is the structural representation of anti-overflow cover plate in the utility model electric cooker;
Fig. 5 is the structural representation of hot-air system in the utility model electric cooker;
Fig. 6 is the sketch map of hot blast wind direction in the utility model electric cooker, and arrow is represented the hot blast flow direction among the figure.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described further.
The utility model comprises cover assembly, interior pot and pot body assembly, and cover assembly is hinged on pot body assembly, and interior pot places in pot body assembly.Because of the technical scheme of the utility model only relates to the improvement to the cover assembly part, do not relate to improvement to pot body components, therefore, the present embodiment content keypoint is described the architectural feature of cover assembly, and will not detail the structure of pot body assembly.
Show like Fig. 1 to Fig. 6; Cover assembly 100 comprises cover 110, inner cap 120, insulation seat board 130, anti-overflow cover plate 140, steam valve 150 and hot-air system 160; Cover 110 is fixed on inner cap 120 tops; Insulation seat board 130 is fixed on the below of inner cap 120, and anti-overflow cover plate 140 is arranged on the below of insulation seat board 130, contacts with the air of rice 300 tops in the interior pot 200.Steam valve 150 places cover 110 tops; Corresponding steam valve 150 is respectively equipped with the steam venthole on cover 110, inner cap 120, insulation seat board 130, the anti-overflow cover plate 140; In the superfluous water steam of pot in 200 to discharge pot through above-mentioned each steam venthole via steam valve 150 external, prevent that rice from producing to overflow.Also be provided with hot blast air outlet 141 on the anti-overflow cover plate 140.
As shown in Figure 5; Hot-air system 160 comprises vortex flow fan 161, tube connector 162, heater 163, wind pipe 165; Vortex flow fan 161 is fixed on the inner cap 120; And be connected with tube connector 162, heater 163, wind pipe 165 successively, the end port of wind pipe 165 is corresponding with the hot blast air outlet 141 on the anti-overflow cover plate 140, and hot-air system is inwardly sent into the hot blast additional heat in the pot through hot blast air outlet 141.
As shown in Figure 3; Heater 163 is pressed on the insulation seat board 130 after fixing through pressing plate 164, and temperature surpasses 100 ℃ during owing to heater 163 work, so also is provided with heat shield 166 between heater 163 and the pressing plate 164; Heat shield 166 is a mica sheet in the present embodiment; Be used for reducing the temperature rise of pressing plate 164, simultaneously be connected the heat-resisting silica gel of tube connector 162 employings between heater 163 and the vortex flow fan 161, and can increase copper pipe again according to the length situation.
Like Fig. 2, Fig. 3, shown in Figure 6; Owing to use vortex flow fan 161; Need and atmosphere, guarantee to have enough gas to get into vortex flow fan 161, can air inlet is set or air inlet is set in perforate on the cover 110 in cover assembly 100 and the hinge connection of stewing between the body assembly.Drain to water on the turbofan 161 because of carelessness when the former possibly cause using, and possibly influence attractive in appearance.The latter is not only safe in utilization, and attractive in appearance, need not to destroy the surperficial uniformity of cover 110.Select for use the hinge connection between cover assembly 100 and pot body assembly that air inlet 167 is set in the present embodiment.
Be illustrated in figure 6 as the wind direction flow schematic diagram when hot-air system is worked in the present embodiment; Air gets into vortex flow fan 161 from air inlet 167; Behind tube connector 162, get into heater 163 and be heated to be the high-temperature hot-air that temperature is higher than 98 ℃ even 120 ℃, then through wind pipe 165 in hot blast air outlet 141 gets into the pot 200, with the water vapour of rice 300 tops shift onto discharge in the steam valve 150 stew external; Hot blast constantly flows above rice 300, and rice is carried out heat supplement.
In order to increase the pressure of hot blast air outlet 141, make that leaving air temp is higher, speed is faster, generally the cross-sectional area with air outlet 141 is designed to the cross-sectional area less than wind pipe 165.
Because heater 163 is to air heat; Whole process is in the state of dry combustion method basically; For product safety; Can use common heater to mix temperature sensor or dry combustion method protector again, also can use ptc heater, ptc heater has self automatically to be regulated power and is used to prevent overheated dry combustion method.Select ptc heater in the present embodiment for use.
Heater 163 is designed to pipeline type, is arranged on the side of tube connector 162 and wind pipe 165, to the air heat in the pipeline.
For the convenience that connects; Between heater 163 and hot blast air outlet 141, being provided with curved wind pipe 165 in the present embodiment connects; Can certainly not use the wind pipe 165 of this connection usefulness, but be directly connected to hot blast air outlet 141 to ptc heater, but need ptc heater be made as curved like this; Processing is difficulty relatively, and cost is higher.
In the present embodiment, be not easy to reduce for heat conduction well makes the temperature of the hot blast of the wind pipe 165 of flowing through, wind pipe 165 can use copper pipe and fixing with ptc heater 163 welding; And heat-preservation cotton is wrapped on the surface at copper pipe; On the one hand, the heat transfer rate of copper pipe is exceedingly fast, and can guarantee temperature and ptc heater basically identical; On the other hand, heat-preservation cotton can prevent that temperature from reducing.
For the possibility that prevents rice to cook the thin rice gruel that overflows in the process gets into hot-air system 160, as shown in Figure 6, the wind pipe 165 that connects hot blast air outlet 141 is configured to higher position, and hot blast air outlet 141 is designed to aperture.
Because rice also has water at boiling stage, the flowability of dependence water can be delivered to the heat of bottom heater the top of rice, and therefore, hot-air system does not generally use in boiling link or link before.Preferably, can be at the after-stage of boiling link, or the cook rice over a slow fire link of boiling link after finishing used.Because after getting into the link of cooking rice over a slow fire, the moisture in the rice obviously reduces, at this moment the temperature of rice bottom becomes higher owing to anhydrous, and the temperature on rice top slowly reduces.Move hot-air system 160 this moment, and heater 163 is opened and heated, and vortex flow fan 161 is opened and carried out wind-guiding, and the hot blast after heater via 163 heating flows into the top of rice 300 continuously from hot blast air outlet 141.In order to reach the effect of better cooking rice over a slow fire, the hot blast temperature of hot blast air outlet 141 is higher than 98 ℃, even is higher than 120 ℃; Can promote the gelatinization that the rice upper surface is good like this; The content of the water vapour of adjustment rice top, the gold moisture content of assurance rice promotes rice more fragrant.