CN105534269A - Method capable of achieving braising effect and braising pot structure thereof - Google Patents
Method capable of achieving braising effect and braising pot structure thereof Download PDFInfo
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- CN105534269A CN105534269A CN201610023118.5A CN201610023118A CN105534269A CN 105534269 A CN105534269 A CN 105534269A CN 201610023118 A CN201610023118 A CN 201610023118A CN 105534269 A CN105534269 A CN 105534269A
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
- A47J27/002—Construction of cooking-vessels; Methods or processes of manufacturing specially adapted for cooking-vessels
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J36/00—Parts, details or accessories of cooking-vessels
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J36/00—Parts, details or accessories of cooking-vessels
- A47J36/02—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay
- A47J36/04—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay the materials being non-metallic
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J36/00—Parts, details or accessories of cooking-vessels
- A47J36/24—Warming devices
- A47J36/2483—Warming devices with electrical heating means
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- Food Science & Technology (AREA)
- Manufacturing & Machinery (AREA)
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Abstract
The invention relates to a method capable of achieving a braising effect and a braising pot structure thereof. According to the method capable of achieving the braising effect, a braising pot is involved and comprises a pot body, a central control unit, an internal pot capable of being arranged in the pot body, a pot cover covering and pressing the internal pot, and a heater arranged under the internal pot. The central control unit can control the heater whether to carry out heating or not; a temperature sensor capable of detecting temperature of the internal pot is arranged on the pot body and is in signal connection with the central control unit; a ceramic, or red porcelain or stone pot container is adopted as the internal pot, and the heater can move up and down. When the internal pot is heated to a threshold value, the central control unit responds to the threshold value, controls the heater to stop heating, and enables the heater to move downwards to leave the internal pot by a certain distance, then, the internal pot utilizes waste heat to work continuously, and conversion from high-temperature fire to braising is achieved. In this way, the heat storage characteristic of the internal pot and the threshold value control mode are utilized for achieving braising, so that food is prevented from being burned.
Description
Technical field
The present invention relates to a kind of method that can form stewing effect processed, use described stewing method processed automatically to obtain and well boil in a covered pot over a slow fire effect processed but also can avoid or reduce food and occur that sticky end is charred, also relate in addition realize described stewing method processed simmer Cooker structure.
Background technology
Kitchen utensils on current market, such as electric cooker, stewing pot, slow cooker etc., generally all comprise a pot body, the heater being placed on the interior pot in described pot body and can heating the food in described interior pot.And in the process used, the most basic cooking methods is exactly adopt mode of heating dryout the water continuous heating in pot and then boil food, heater stops the time point of heating to be typically chosen in the boiling temperature about 10 ° of interior pot temperature higher than water, also no matter be namely traditional mechanical temperature controller or the temperature controller of electronic type, all will the temperature-control range of heating be stopped to be set in more than the boiling point of water than higher temperature point, after such culinary art heating terminates, by the impact of the fixed structure of described heater, the bottom of described interior pot is be fitted on described heater all the time, although described heater stopped heating, but described heater still leaves a large amount of waste heats, the waste heat of described heater can continue heat the food in described interior pot and be very easy to cause food sticky end to be charred.
And in order to the waste heat of described heater can be avoided to carry out excessive heating to food in described interior pot, on May 29th, 2014, Shenzhen company of Linkage proposes the utility model patent that the patent No. is 201420280422.4, the patent proposes the liftable electric caldron of a kind of heater.Described electric caldron has the elevating mechanism that can be elevated described heater.After completing the whole culinary art heating process to food, described elevating mechanism can drive described heater to decline and leave the pot bottom of described interior pot, thus prevents the waste heat of described heater from carrying out superheated to the food completing culinary art in described interior pot and affecting the culinary art effect of food.
Summary of the invention
Above-mentioned patent 201420280422.4 can make heater away from described interior pot by described elevating mechanism fast and in time, thus avoid the harmful effects such as to the excessive food heating in described interior pot, the waste heat of described heater causes that transition is burnt, but this technology only proposes the pattern that internal pot or food are heated, with regard to how utilizing this heating mode to realize various culinary art further, be not further disclosed.
Given this, one of goal of the invention of the present invention is intended to propose a kind of method that can form stewing effect processed, comprise and simmer pot, the described pot that simmers comprises a pot body, central controller, the interior pot that can be placed in described pot body, covers the pot cover be pressed on described interior pot and the heater be arranged on below described interior pot, and whether described central controller can control described heater and generate heat; It is characterized in that: on described pot body, arrange the temperature sensor that can detect described interior pot temperature, described temperature sensor signal connects described central controller; Described interior pot is pottery class, boccaro class or building stones class pot courage, and described heater can move up and down; When heating described interior pot and meeting threshold value, described central controller is in response to described threshold value and control described heater thereupon and stop heating also allow under described heater moving away the certain spacing of described interior pot, in described in this relief, pot utilizes waste heat to work on, and realizes from very hot oven to the conversion simmered.
Wherein, described in simmer pot be a kind of kitchen tools that at least can carry out stewing system culinary art to food, it may be used for stewing rice milling meal, congee rice, can also be used for other food of stewing system, the such as food such as sirloin, chop, specifically can according to user like elect.
Wherein, described pot body is the parts for accommodating described heating element and described central controller, and described pot body can also be installed with described interior pot and combine as the described agent structure simmering pot.
Wherein, described interior pot is a kind of container for holding food to be processed.
Wherein, because whether heater described in described central controller controls generates heat, the working condition of described heater is subject to the control of described central controller for this reason, like this, at least can substitute people's hand operated by described central controller and simmer pot described in making and be provided with computer heating control more accurately, also simmer pan described in making simultaneously and have mode of operation more easily, practicality is stronger.
Wherein, described heater can move up and down, and the mounting structure it defining described heater is a kind of structure that can move up and down; Forming the structure that described heater can move up and down has a variety of, and wherein a kind of structure adopts the structure disclosed in ZL201420280422.4, but the shortcoming of this structure is its drive screw Direct Contact Heating device easily damages; Another kind is the lever construction will mentioned below, can realize better the elevating control of heater but lift drive mechanism particularly motion thread part can not Direct Contact Heating device.Like this when described heater moves up can near or fit to described interior pot bottom on thus can be described interior pot conduction heating.Otherwise, the certain spacing of described interior pot can be left again when described heater moves down.
Wherein, described interior pot is pottery class, boccaro class or building stones class pot courage, namely not adopt traditional metal material pan, because described pottery class, boccaro class or building stones class pot courage have the thermal storage performance higher than metal pan courage, cost is relatively low, not only cost is low for described so interior pot, environmental protection but also have and can store a large amount of heats and the slow characteristic of radiating rate, such as ceramic pot bladder, native buckpot courage, the high heat storage pot courages such as building stones pot courage.Use described high heat storage pot courage can when described heater stops heating, utilize the temperature stored by described high heat storage pot courage not carry out follow-up stewing system higher than a large amount of waste heats of the boiling point of water to the food be placed in described high heat storage pot courage, stewing temperature processed reduces gradually and can not tie crispy rice.In addition, it should be noted that, the waste heat of described interior pot refers to after described heater stops heating, still retains the heat be stored in described interior pot.
Wherein, described when heating feature when described interior pot meets threshold value, first define the time period that described heater carries out heating work, simmer pot described in the working time section of described heater and complete first half heating tasks to food, water in described interior pot itself and pot, the effect of the very hot oven boiling that similar people commonly use can be reached.Conveniently discuss, also conveniently " simmer " heating process with latter half to distinguish mutually, we are defined as " very hot oven " boiling process the heating process of first half, and why called after " very hot oven " just represents that above-mentioned heating process can reach the effect of similar very hot oven boiling; Secondly, also define described heater quit work and under move away the time point of described interior pot, when namely described interior pot meets described threshold value, described heater stops heating.
Wherein, described in described temperature sensor senses in pot temperature and signal connects described central controller, described central controller can receive described temperature sensor sensing signal and and then implement follow-up control.The heat time that the temperature or very hot oven stage that like described interior pot itself are implemented of described central controller response for this reason.
Wherein, described threshold value be one for judging and characterize the design load of described interior pot temperature, also be judged as implementing follow-up simmer described heater and whether stopping heating and the time moved down closes on value, the method characterizing described threshold value can be generally the action critical point of heat sensor, the limit value voltage arranged in the voltage of heat sensor or current value or controller, electric current, frequency, the various parameter such as clock, described threshold value can by arranging the feature structure of described temperature sensor for this reason, the modes such as the circuit structure of central controller or the control flow working value of software control module realize.Because described threshold value itself is that it can not be detected directly but can externally embody design load for this reason, the described threshold value of external embodiment is a kind of controlling run result instead of described threshold value itself.In the present invention, what characterize the described threshold value external feature of embodiment is when described interior pot meets described threshold value, the water that part is implemented to simmer also obviously is had at least described interior pot, water no matter in described interior pot seethed with excitement or or do not seethe with excitement, heater described in described central controller controls stops heating also allow the bottom moving away described interior pot under described heater, realize from very hot oven to the conversion simmered, stewing temperature processed reduces gradually and can not tie crispy rice.
In order to obtain desirable effect stewing processed, further, described threshold value is set to corresponding to the boiling temperature numerical value closing on water (± 3 ° ~ ± 5 ° more suitable) or/and correspond to the heat time of very hot oven stage enforcement.The heat time that the described very hot oven stage implements both had referred to the omnidistance heat time that the very hot oven stage implements, and also referred to the heat time continued after very hot oven phase temperature arrives the boiling temperature of water.Namely early stage very hot oven heating time be also described threshold value consider variable, in the length of heat time and pot water-holding quantity number be also the problem of direct correlation, the water in pot at least all can not be dryouied phase reaction and at least ought ensure also to retain in described interior pot have the water can implementing to simmer by the very hot oven heating period.If do not have the water of storage in described interior pot, namely there is the crispy rice alleged by tradition in the even higher but also food that can burn in pot of the boiling point 10 ° ~ 20 ° that the operating temperature of described interior pot not only can sharply rise at short notice considerably beyond water.Although some prior aries adopt automatic temperature-adjusting accurately to control to relax this problem but due to the measure error of the inertia of heating, the heat accumulation characteristic of interior pot itself and temperature-sensitive sticker existence itself, still can not solve this problem well.For this reason, the present invention arranges described threshold value in fact also defines a kind of work operating mode a kind of globality in other words simultaneously cooking methods with this, namely by can based on the described pottery class of mass storage heat, boccaro class or building stones class pot courage, whether to retain the operating mode that several key elements such as water are arranged as benchmark in pot temperature value in setting and described interior pot.And how to judge whether to have retained in described interior pot water, can with characteristic food item accordingly time of water injection rate, laser heating, heating-up temperature rising gradient, arrive water boiling temperature after continuous heating time quantum etc. comprehensively arrange.The present invention is actually in the problem of the heat accumulation characteristic of the described interior pot mainly avoided desired by existing precision Control Technology, contrary pattern is adopted mainly to utilize the heat accumulation characteristic of described interior pot to adopt threshold value control model to realize simmering method, substitute the high accuracy control method of existing price by more extensive simple control method, realization simmers and the temperature simmered in process reduces gradually and can not tie crispy rice.
Certainly in order to obtain desirable effect stewing processed, further, can also adopt and cook, the pattern of differentiated control such as pot congee or Baoshang etc., namely for the pattern of cooking, when can arrive boiling point in the temperature sensing described interior pot, at once allow described heater quit work in response to this threshold value and under move away described interior pot, or continue such as 2 to 5 minutes a period of time of heating after when the temperature sensing described interior pot arrives the boiling temperature of water, allow described heater quit work again in response to this threshold value and under move away described interior pot, in described in this relief, pot utilizes waste heat to work on, for the pattern of Baoshang, when can arrive boiling point in the temperature sensing described interior pot, at once allow described heater quit work in response to this threshold value and under move away described interior pot, in described in this relief, pot utilizes waste heat to work on, when again promote described heater after sensing the temperature of described interior pot and obviously declining and heat a period of time allow the temperature of described interior pot again arrive boiling point time, again at once allow described heater quit work again in response to this threshold value and under move away described interior pot, in described in this relief, pot utilizes waste heat to work on.For this reason concrete procedure can according to the type of food, the demand of culinary art of the system of boiling in a covered pot over a slow fire such as stew meal, cook congee or reasonable design and the selection such as Baoshang.But no matter adopt which kind of mode, simmer pot described in the process that described heater heats just allows and complete to heat foods also to the first half heating tasks of described interior pot heating, be i.e. " very hot oven " boiling process; Also control also obviously have part water at least described interior pot when described heater stops heating at described central controller in response to described threshold value thereupon, waste heat by means of described interior pot continues " simmering " process thus gives subsequent evaporation to this part water, allow the temperature of follow-up " simmering " process not higher than the boiling point of water, temperature reduces gradually can not tie crispy rice.
Secondly, after heater described in described central controller controls stops heating also allow moving away the certain spacing of described interior pot under described heater, described interior pot is allowed to utilize waste heat to work on, realize from very hot oven to the conversion simmered, like this, after described heater stops heating, the food in described interior pot and water mainly rely on the waste heat of described interior pot to proceed to heat stewing system, and stewing temperature processed reduces gradually and can not tie crispy rice.Now, described in simmer the heating that pot enters latter half and boil in a covered pot over a slow fire process processed, can reach the effect of the system of simmering that similar people commonly use, we are defined as " simmering " stewing process processed the heating process of this latter half.Similarly, why called after " simmers " effect that the subsequent heat process just representing above-mentioned can reach similar stewing system.
Secondly, described heater stops heating also allow under described heater moving away the certain spacing of described interior pot, like this, insulated space is formed between described heater and described interior pot, to avoid or the waste heat heat reduced on described heater is directly delivered in large quantities on described interior pot and carries out superheated to the food in described interior pot, but, the waste heat on described heater still can within a period of time by thermal-radiating form for described interior pot provides a small amount of heat.In addition, it can be synchronous or contextual that described heater stops heating moving down between action with described heater, also can be that delay voltage separated in time substep carries out, as long as ensure to allow when also obviously having part water at least described interior pot, to move away described interior pot under described heater be feasible scheme; Stop heating moving down action front at front or described heater as described heater, also can set arbitrarily.Heater described in described central controller controls stops heating also allow under described heater moving away the certain pitch characteristics of described interior pot for this reason, first it is emphasised that described heater stops heating and described heater to move down the conformability had between action, what next was emphasized is only action continuity in time, and does not mean that and stop heating by described heater to move down with described heater must be synchronous in time between action.
According to technique scheme, be compared with the prior art, main efficacy results of the present invention is:
1. owing to arranging the temperature sensor that can detect described interior pot temperature on described pot body, described temperature sensor signal connects described central controller, controls basis for the problem controlling described interior pot further provides.Further because described interior pot is pottery class, boccaro class or building stones class pot courage, for realizing simmering the heat accumulation platform provided, the present invention is actually in the problem of the heat accumulation characteristic of the described interior pot mainly avoided desired by prior art, adopts contrary pattern mainly to utilize the heat accumulation characteristic of described interior pot to adopt threshold value control model to realize simmering method.
2., because described heater can move up and down, provide further heat insulation guarantee for preventing burning foods; Further, due to when heating described interior pot and meeting threshold value, described central controller is in response to described threshold value and control described heater thereupon and stop heating also allow under described heater moving away the certain spacing of described interior pot, realize from very hot oven to the conversion simmered, the waste heat heat that so just can store by means of described interior pot itself is substantially when can not continue heating cooking food, evaporate remaining water in described interior pot but food can not be allowed to be burnt when boiling temperature higher than water, and after transferring " simmering " pattern to, the temperature of described interior pot constantly declines.
3. the present invention is actually in the problem of the heat accumulation characteristic of the described interior pot mainly avoided desired by existing precision Control Technology, contrary pattern is adopted mainly to utilize the heat accumulation characteristic of described interior pot to adopt threshold value control model to realize simmering, substitute the high accuracy control method of existing price by more extensive simple control method, realization simmers and the temperature simmered in process reduces gradually and can not tie crispy rice.
Further technical scheme can also be, described temperature sensor is arranged on the top of described pot body thus can checks the temperature of described interior pot outer upper position.Like this, due to described temperature sensor be arranged on described pot body top thus can away from the heater be arranged on below described interior pot, reduce the inspection precision of heat to described temperature sensor that described heater produces and produce bad interference.The more important thing is, due to the pot courage that described interior pot is high heat storage performance, by in the process that heats, described interior pot self-temperature is uneven, its upper temp generally can lower than the temperature of heated part, bottom, detect top with the temperature of described interior pot outer upper position for benchmark provides signal to described central controller for this reason, thus described interior pot abundant heat accumulation can be ensured, greatly improve the effect simmered.
Further technical scheme can also be, the thickness of described interior pot is greater than 5 ㎜, preferably reaches between 8 ㎜ to 12 ㎜.Like this, described interior pan has heat accumulation effect superior more for it, can reach more preferably stewing effect processed.
Further technical scheme can also be, described heater moves down the distance departing from described interior pot and is greater than 3 ㎜.
In addition, the present invention also propose a kind of realize above-mentioned stewing method processed simmer Cooker structure, comprise a pot body, central controller, the interior pot that can be placed in described pot body, cover the pot cover be pressed on described interior pot and the heater be arranged on below described interior pot, described central controller controls described heater by gauge tap; It is characterized in that: on described pot body, arrange the temperature sensor that can detect described interior pot temperature, described temperature sensor signal connects described central controller, described interior pot is pottery class, boccaro class or building stones class pot courage; Described heater has the structure that can move up and down, described central controller has the threshold value in response to the described interior pot of heating and controls described heater thereupon and stops heating also allow under described heater moving away the certain spacing of described interior pot, realize from very hot oven to the heater control unit simmering conversion.
Wherein, described central controller has the signal receiving unit of the temperature signal receiving described temperature sensor, also there is heater control unit, when heating described interior pot and meeting threshold value, described central controller is in response to described threshold signal, and described heater can be controlled by described heater control unit and stop heating also allow under described heater moving away the certain spacing of described interior pot, in described in this relief, pot utilizes waste heat to work on, and realizes from very hot oven to the conversion simmered.For this reason, described central controller has the function simmering the heating process of pot described in control.
Wherein, described gauge tap is that the power supply that can control described heater breaks the device closed, the electronic switch etc. of its can be mechanical type electric shock switch also can be transistor-like, the make and break of described gauge tap is controlled by the described heater control unit of described central controller.
Further technical scheme can also be, described threshold value is set to corresponding to closing on the boiling temperature numerical value of water or/and correspond to the heat time of very hot oven stage enforcement.
Further technical scheme can also be, also comprises the elevating mechanism that described heater can be driven to move up and down, and described elevating mechanism is connected with described central controller signal; Described elevating mechanism comprises driver and lever body, and the stage casing body of rod of described lever body is bearing in supporting point body; The head end of described lever body is fixedly attached on described heater, and tail end and described driver are in transmission connection; When described in described driver drives, the tail end of lever body moves up and down, described lever body is lifted up up and down around described supporting point body, thus drives described heater to move up and down by the head end of described lever body.
Wherein, the stage casing body of rod of described lever body refers to the body of rod region between the head end and tail end of described lever body.
Wherein, the head end of described lever body is fixedly attached on described heater, and the head end of described lever body can be directly connected on described heater, can also indirectly be connected on described heater.For this reason, head end and the described heater of described lever body connect, and rely on the head end of described lever body described heater to be played to the effect of supporting and location like this.
According to technique scheme, the structure of described elevating mechanism is extremely simple, make use of the lifting that lever principle controls described heater dexterously.And utilize together with described lever body is in transmission connection described driver with described heating element, thus make described driver have set-up mode and selectable installation site more flexibly, also the motion thread part of described elevating mechanism can not be allowed directly to contact described heater, and long-term baking is processed and damage, effectively extend the service life of described elevating mechanism.
Further technical scheme can also be, between the tail end and described driver of described lever body, be also provided with engaging mechanism, and described engaging mechanism comprises upper and lower to the tooth bar arranged and the gear with described tooth bar engaged transmission; Described tooth bar is arranged on the tail end of described lever body, and described gear is arranged on also can around its rotating shaft rotation under the driving of described driver on described driver.
Wherein, described upper and lower defines the layout type of described tooth bar to the tooth bar arranged, described tooth bar on the whole by the oscilaltion direction of motion layout of described heating element, thus makes multiple tooth upper and lowers on described tooth bar to arrangement.Like this, when described gear is around its rotating shaft time rotational, described tooth bar can be driven to move up and down.
Further technical scheme can also be, described temperature sensor is arranged on the top of described pot body thus can checks the temperature of described interior pot outer upper position.
Further technical scheme can also be, also comprise joint pin, described joint pin is connected between described bottom of pot body and described heater, between described heater and described bottom of pot body, be also provided with back-moving spring, and described back-moving spring is set on described joint pin.
Wherein, first described joint pin is the middle transition connector that described pot body and described heater are integrally connected, and secondly, because described back-moving spring is set on described joint pin, described joint pin also becomes the locator of described back-moving spring.
According to technique scheme, described joint pin and described back-moving spring assist to provide stable resiliency supported for institute's heater mutually, can also provide the space of floating downwards for described heater.
Further technical scheme can also be, also comprises for checking whether described heating element arrives the upper limit position switch of upper extreme position, and comprises for checking whether described heating element arrives the lower position switch of lower limit position.
According to technique scheme, compared with prior art, the present invention can also obtain following beneficial effect and is:
1. because described interior pot is the high heat storage pot courages such as pottery class, boccaro class or building stones class, for this reason, described interior pot can store many heats, like this, after described heater stops heating, the waste heat of described interior pot still can be relied on to heat stewing system lenitively, for a long time to the food in described interior pot.
2. owing to being provided with described central controller, when heating described interior pot and meeting threshold value, described central controller is in response to described threshold value and control described heater thereupon and stop heating also allow under described heater moving away the certain spacing of described interior pot, in described in this relief, pot utilizes waste heat to work on, realize from very hot oven to the conversion simmered, the existence of described central controller decreases the manual intervention of people in the process of heating cooking for this reason, and at least can Substitute For Partial people hand operated, thus the process stewing processed simmering pot described in enabling realizes semi-automation even full-automatic, and then also just can reduce or avoid the maloperation of staff and affect the effect stewing processed of food.In addition, owing to being controlled the position of described heater and heat time by described central controller, thus can control accurately described " duration and degree of heating " simmering pot, simmer pot described in making and automatically switch to " simmering " stewing system from " very hot oven " boiling.
3. due to when heating described interior pot and meeting threshold value, heater described in described central controller controls stops heating and allows under described heater and moves away the certain spacing of described interior pot, in described in this relief, pot utilizes waste heat to work on, realize from very hot oven to the conversion simmered, that is, the described hingle heating cooking process that simmers is divided into two heating processes, i.e. " very hot oven " boiling process of first half and latter half " simmering " stewing process processed.There is obvious internal and distinguish in the culinary art mode of heating of the electric caldron in this mode and above-mentioned 201420280422.4, electric caldron in above-mentioned 201420280422.4 after completing whole heating process, just stops the heating of described heater and allows described heater away from described interior pot bottom, and the waste heat of follow-up so described interior pot can cause excessive food heat and occur that sticky pot is charred.And in the present invention, adopt the mode of heating that the elder generation to food " very hot oven " " simmers " afterwards, can be heated described food by described heater, also heat described interior pot makes it store certain heat simultaneously, and after described heater stops heating, the waste heat of described interior pot can be utilized to heat the food in described interior pot and water, that is described heater does not need to simmer omnidistance work in the process of pot heating described, the energy can not only be saved like this, the heat be stored on described interior pot can also be made full use of, improve the utilization rate of heat.In addition, in the later stage to food " simmering " stewing process processed, described heater quits work and away from described interior pot, thus can reduce or avoid the waste heat of described heater be delivered to too much on described interior pot and carry out transition heating to the food in described interior pot.Like this, to the automatic switchover that " very hot oven " heating and " simmering " described in food are heated, simmer pot described in making and be provided with beyond thought stewing effect processed.
Because the present invention has These characteristics and advantage, the method that can form stewing effect processed can be applied to for this reason and simmer in Cooker structure.
Accompanying drawing explanation
Fig. 1 is the structural representation overlooking direction simmering pot that can form stewing effect processed of application technical solution of the present invention;
Fig. 2 is the cross-sectional view in the A-A direction in Fig. 1;
Fig. 3 is the partial enlargement structural representation in the B region in Fig. 2;
Fig. 4 is the perspective view simmering pot that can form stewing effect processed of application technical solution of the present invention;
Fig. 5 be in Fig. 4 simmer pot turn after perspective view, see that the structure of described lowering or hoisting gear is but fallen described outer lower casing 322 to know in figure;
Fig. 6 is the perspective view of described temperature-sensitive shell 51;
Fig. 7 simmers the electric control principle schematic diagram of pot described in being.
Detailed description of the invention
Below in conjunction with accompanying drawing, the structure simmering pot that can form stewing effect processed of application technical solution of the present invention and stewing method processed thereof are further described.
As shown in Figures 1 to 7, be application technical solution of the present invention simmer pot 100, the described pot 100 that simmers is a kind of kitchen tools that at least can carry out stewing system culinary art to food, it is for stewing rice milling meal, certainly can also be used for stewing congee rice processed or Baoshang according to technical solution of the present invention, specifically can the person of installing and using like elect.
Describedly simmer that pot 100 comprises pot body 3, the interior pot 1 be placed in described pot body 3, lid are pressed in pot cover 10 on described interior pot 1, be arranged on the heater 2 below described interior pot 1 and be arranged on the central controller (not shown in FIG.) in described pot body 3, whether described central controller controls described heater 2 by gauge tap and generates heat; Described pot body 3 arranges the temperature sensor 5 that can detect described interior pot 1 temperature, and described temperature sensor 5 signal connects described central controller; Also comprise the elevating mechanism 4 that described heater 2 can be driven to move up and down, described elevating mechanism 4 signal is connected to described central controller, and described interior pot 1 is ceramic pot bladder, can also be the high heat storage pot courage such as boccaro class or building stones.Described central controller has the signal receiving unit of the temperature signal receiving described temperature sensor 5, and have in response to heating described interior pot 1 threshold value and control thereupon described heater 2 stop heating also allowing described heater move away the certain spacing of described interior pot 1 for 2 times, realize from very hot oven to the heater control unit simmering conversion.When heating described interior pot 1 and meeting threshold value, described central controller also controls described heater 2 in response to described threshold value thereupon and stops heating also allowing described heater move away the certain spacing of described interior pot 1 for 2 times, in described in this relief, pot 1 utilizes waste heat to work on, and realizes from very hot oven to the conversion simmered.
Wherein, described pot body 3 comprises inner casing 31, and described inner casing 31 is provided with the container cavity for placing described interior pot 1, and by described container cavity, described pot body 3 combination is installed on described inner casing 31.Described pot body 3 also comprises shell 32, and described shell 32 is combined by the outer upper casing 321 docked up and down and outer lower casing 322.Between described shell 32 and inner casing 31, be formed with host cavity 300, described elevating mechanism 4 is accommodated in described host cavity 300.In addition, described host cavity 300 as heat isolation layer, can also reduce the heat loss of described heater 2 and described interior pot 1, plays certain insulation effect.
The described interior pot 1 of current pan is generally use metal material to make, the heat that in described metal, pot stores is few and radiating rate is fast, after described heater 2 stops heating, the waste heat depending merely on pot in described metal can not allow the rice in described interior pot 1 boil.Described interior pot 1 of the present invention adopts the high heat storage pot courages such as ceramic pot bladder, boccaro class or building stones for this reason.Because described pottery class, boccaro class or building stones class pot courage have the thermal storage performance higher than metal pan courage, cost is relatively low, and not only cost is low for described so interior pot 1, environmental protection but also have and can store a large amount of heats and the slow characteristic of radiating rate.Use described high heat storage pot courage, can when described heater 2 stops heating, utilize the temperature stored by described high heat storage pot courage not carry out follow-up stewing system higher than a large amount of waste heats of the boiling point of water to the food be placed in described high heat storage pot courage, stewing temperature processed reduces gradually and can not tie crispy rice.In order to obtain better stewing effect processed, preferably, the wall thickness of described interior pot 1 is greater than 5 ㎜, preferably between 8 ㎜ to 12 ㎜.
Wherein, because whether heater described in described central controller controls generates heat, the working condition of described heater is subject to the control of described central controller for this reason, like this, at least can substitute people's hand operated by described central controller and simmer pot described in making and be provided with computer heating control more accurately, also simmer pan described in making simultaneously and have mode of operation more easily, practicality is stronger.
Wherein, described temperature sensor 5 senses the temperature of described interior pot 1 and signal connects described central controller, and described central controller can receive the sensing signal of described temperature sensor 5 and and then implement follow-up control.The heat time that the temperature or very hot oven stage that like described interior pot 1 itself are implemented of described central controller response for this reason.
Wherein, described gauge tap is that the power supply that can control described heater breaks the device closed, the electronic switch etc. of its can be mechanical type electric shock switch also can be transistor-like, the make and break of described gauge tap is controlled by the described heater control unit of described central controller.
Wherein, described threshold value be one for judging and characterize the design load of described interior pot 1 self-temperature, also be judge whether stop heating and the time moved down closes on value to reach stewing effect processed heater 2 of the present invention, the various parameter such as limit value voltage, electric current, frequency, clock that the method characterizing described threshold value can be generally the action critical point of heat sensor, arrange in controller, described threshold value can realize by arranging the modes such as the control flow working value of the described feature structure of temperature sensor 5, the circuit structure of central controller or software control module for this reason.Because described threshold value is that it can not be detected directly but can externally embody design load for this reason, the described threshold value of external embodiment is a kind of controlling run result instead of described threshold value itself.In the present invention, what characterize the described threshold value external feature of embodiment is when described interior pot 1 meets described threshold value, also part water is obviously had at least described interior pot 1, water no matter in described interior pot 1 seethed with excitement or or do not seethe with excitement, heater 2 described in described central controller controls stops heating also allowing described heater move away the bottom of described interior pot 1 for 2 times, realize from very hot oven to the conversion simmered, stewing temperature processed reduces gradually and can not tie crispy rice.
In order to obtain desirable effect stewing processed, described threshold value is set to corresponding to the boiling temperature numerical value 100 ° closing on water (± 3 ° ~ ± 5 ° more suitable) or/and correspond to the heat time of very hot oven stage enforcement.The length of heat time and the number of pot internal memory water gaging are also the problems of direct correlation, namely the time of very hot oven heating in early stage be also described threshold value consider variable, the water in pot at least all can not be dryouied phase reaction and at least ought to ensure in described interior pot also to retain have the water can implementing to simmer by the very hot oven heating period.If do not have the water of storage in described interior pot, the operating temperature of described interior pot not only can sharply rise the crispy rice namely occurring alleged by tradition considerably beyond the boiling point 10 ° ~ 20 ° of water but also the food that can burn in pot at short notice.Although some prior aries adopt automatic temperature-adjusting accurately to control to relax this problem but due to the measure error of the inertia of heating, the heat accumulation characteristic of interior pot itself and temperature-sensitive sticker existence itself, still can not solve this problem well.For this reason, the present invention arranges described threshold value in fact also defines a kind of work operating mode a kind of globality in other words simultaneously cooking methods with this, namely by can based on the described pottery class of mass storage heat, boccaro class or building stones class pot courage, whether to retain the operating mode that several key elements such as water are arranged as benchmark in pot temperature value in setting and described interior pot.And how to judge whether to have retained in described interior pot water, can with characteristic food item accordingly time of water injection rate, laser heating, heating-up temperature rising gradient, arrive water boiling temperature after continuous heating time quantum etc. comprehensively arrange.The present invention is actually in the problem of the heat accumulation characteristic of the described interior pot mainly avoided desired by existing precision Control Technology, contrary pattern is adopted mainly to utilize the heat accumulation characteristic of described interior pot to adopt threshold value control model to realize simmering method, substitute the high accuracy control method of existing price by more extensive simple control method, realization simmers and the temperature simmered in process reduces gradually and can not tie crispy rice.
And in order to obtain desirable effect stewing processed, can also adopt cook, the pattern of the differentiated control such as congee or Baoshang of stewing, namely for the pattern of cooking, when can arrive boiling point in the temperature sensing described interior pot, at once allow described heater quit work in response to this threshold value and under move away described interior pot or continue such as 2 to 5 minutes a period of time of heating after the temperature sensing described interior pot arrive the boiling temperature of water, allow described heater 2 quit work again in response to this threshold value and under move away described interior pot 1, described in this relief in pot 1 utilize waste heat to work on; For the pattern of Baoshang, when can arrive boiling point in the temperature sensing described interior pot 1, at once allow described heater 2 quit work in response to this threshold value and under move away described interior pot 1, in described in this relief, pot 1 utilizes waste heat to work on, when again promote described heater 2 after sensing the temperature of described interior pot 1 and obviously declining and heat a period of time allow the temperature of described interior pot 1 again arrive boiling point time, again at once allow described heater 2 quit work again in response to this threshold value and under move away described interior pot 1, in described in this relief, pot 1 utilizes waste heat to work on.For this reason concrete procedure can according to the type of food, the demand of culinary art of the system of boiling in a covered pot over a slow fire such as stew meal, cook congee or reasonable design and the selection such as Baoshang.But no matter adopt which kind of mode, simmer pot described in the process that described heater 2 heats just allows and complete to heat foods also to the first half heating tasks of described interior pot heating, be i.e. " very hot oven " boiling process; Also control also obviously have part water at least described interior pot when described heater stops heating at described central controller in response to described threshold value thereupon, waste heat by means of described interior pot continues " simmering " process thus gives subsequent evaporation to this part water, allow the temperature of follow-up " simmering " process not higher than the boiling point of water, temperature reduces gradually can not tie crispy rice.
Wherein, when heating feature when described interior pot 1 meets threshold value, first define the time period that described heater 2 carries out heating work, simmer pot described in the working time section of described heater 2 and complete first half heating tasks to food, water in described interior pot itself and pot, the effect of the very hot oven boiling that similar people commonly use can be reached.Conveniently discuss, also conveniently " simmer " heating process with latter half to distinguish mutually, we are defined as " very hot oven " boiling process the heating process of first half, and why called after " very hot oven " just represents that above-mentioned heating process can reach the effect of similar very hot oven boiling; Secondly, also define described heater 2 quit work and under move away the time point of described interior pot 1, stop heating when namely described interior pot 1 meets described threshold value.
Secondly, after heater 2 described in described central controller controls stops heating and allows described heater move away the certain spacing of described interior pot 1 for 2 times, described interior pot 1 is allowed to utilize waste heat to work on, realize from very hot oven to the conversion simmered, like this, after described heater 2 stops heating, food in described interior pot 1 and water mainly rely on the waste heat of described interior pot 1 to proceed to heat stewing system, now, describedly simmer the heating that pot 100 enters latter half and boil in a covered pot over a slow fire process processed, the effect of the system of simmering that similar people commonly use can be reached, stewing temperature processed reduces gradually and can not tie crispy rice.We are defined as " simmering " heating process the heating process of this latter half.Similarly, why called after " simmers " heating process just representing above-mentioned can reach the similar effect simmering boiling.In addition, it should be noted that, the waste heat of described interior pot 1 refers to after described heater 2 stops heating, still retains the heat be stored in described interior pot 1.
Secondly, described heater 2 stops heating also allowing described heater move away the certain spacing of described interior pot 1 for 2 times, like this, insulated space is formed between described heater 2 and described interior pot 1, to avoid or the waste heat heat reduced on described heater 2 is directly delivered in large quantities on described interior pot 1 and carries out superheated to the food in described interior pot 1, but, the waste heat on described heater 2 still can within a period of time by thermal-radiating form for described interior pot 1 provides a small amount of heat.In addition, it can be synchronous or contextual that described heater 2 stops heating moving down between action with described heater 2, also can be that delay voltage separated in time substep carries out, as long as ensure that allowing described heater move away described interior pot 1 for 2 times when also obviously having part water at least described interior pot 1 is feasible scheme; Stop heating moving down action front at front or described heater 1 as described heater 2, also can set arbitrarily.Heater 2 described in described central controller controls stops heating also allowing described heater move away the certain pitch characteristics of described interior pot for 2 times for this reason, first it is emphasised that described heater 2 stops heating and described heater 2 to move down the conformability had between action, what next was emphasized is only action continuity in time, and does not mean that and stop heating by described heater 2 to move down with described heater 2 must be synchronous in time between action.
Described elevating mechanism 4 can adopt multiple embodiment, such as adopt the technical scheme disclosed in prior art patent 201420280422.4, but this structure is too complicated, below we propose a kind of novel elevating mechanism 4 for driving described heater 2 oscilaltion movement.As shown in Figure 2 and Figure 5, described elevating mechanism 4 comprises driver 41 and lever body 44, and the head end 44b of described lever body 44 is fixedly attached on Connection Block 21 by screw 46, and described Connection Block 21 is locked onto on described heater 2 by securing member.Tail end 44a and the described driver 41 of described lever body 44 are in transmission connection; The stage casing body of rod 44c of described lever body 44 is bearing in supporting point body 45, and described supporting point body 45 is fixedly installed on the outside of described inner casing 31; When described driver 41 drives the tail end of described lever body 44 to move up and down, described lever body 44 is lifted up around described supporting point body about 45, thus drives described heater 2 to move up and down by the head end 44b of described lever body 44.Wherein, the stage casing body of rod of described lever body 44 refers to the body of rod region between the head end and tail end of described lever body 44.Secondly, the head end due to described lever body 44 is fixedly attached on described heater 2, and for this reason, head end and the described heater 2 of described lever body 44 connect, and relies on the head end of described lever body 44 described heater 2 to be played to the effect of positioning supports like this.
And be in transmission connection in order to the tail end 44a and described driver 41 realizing described lever body 44, further technical scheme is, between the tail end and described driver 41 of described lever body 44, be also provided with engaging mechanism, described engaging mechanism comprises upper and lower to the tooth bar 43 arranged and the gear 42 with described tooth bar 43 engaged transmission; Described tooth bar 43 is arranged on the tail end of described lever body 44, and described gear 42 is arranged on also can around its rotating shaft rotation under the driving of described driver 41 on described driver 41.In the present embodiment, described gear 42 is set directly on the output shaft of described driver 41, and the output shaft of described driver 41 also just becomes the rotating shaft of described gear 42 simultaneously for this reason.Wherein, described upper and lower defines the layout type of described tooth bar 43 to the tooth bar 43 arranged, described tooth bar 43 on the whole by the oscilaltion direction of motion layout of described heater 2, thus makes multiple tooth upper and lowers on described tooth bar 43 to arrangement.Like this, when described gear 42 is around its rotating shaft time rotational, described tooth bar 43 can be driven to move up and down thus drive described lever body about 44 tilting and make the oscilaltion of described heater 2.
And in order to the scope that described heater 2 moves up and down can be controlled, further technical scheme is, also comprise for checking whether described heater 2 arrives the upper limit position switch 5 of upper extreme position, and comprise for checking whether described heater 2 arrives the lower position switch 50 of lower limit position, described upper limit position switch 5 and lower position switch 50 signal are connected to described central controller.
According to technique scheme, the structure of described elevating mechanism 4 is extremely simple, make use of the lifting that lever principle controls described heater 2 dexterously.And utilize together with described lever body 44 is in transmission connection described driver 41 with described heater 2, thus make described driver 41 have set-up mode and selectable installation site more flexibly, also the motion thread part of described elevating mechanism can not be allowed directly to contact described heater, and long-term baking is processed and damage, effectively extend the service life of described elevating mechanism.
Further technical scheme is, described temperature sensor 5 is arranged on the top of described pot body 3 thus can checks the temperature of described interior pot 1 outer upper position.Like this, be arranged on the top of described pot body 3 due to described temperature sensor 5 thus away from the heater 2 be arranged on below described interior pot 1, the heat of described heater 2 generation can be reduced to the bad interference of the inspection precision of described temperature sensor 5; The more important thing is, due to the pan that described interior pot 1 is high heat storage performance, by in the process that heats, described interior pot 1 self-temperature is uneven, its upper temp generally can lower than the temperature of heated part, bottom, detect top with the temperature of described interior pot 1 outer upper position for benchmark provides signal to described central controller for this reason, thus described interior pot 1 abundant heat accumulation can be ensured, greatly improve the effect simmered.
Discuss the structure of described temperature sensor 5 below in detail, as shown in Figure 3 and Figure 6, described temperature sensor 5 comprises temperature-sensitive shell 51 and is arranged on the thermistor 50 on described temperature-sensitive shell 51, and described thermistor 50 signal is connected to described central controller.Described temperature-sensitive shell 51 is roughly plate-like thus has try to get to the heart of a matter wall and dish perisporium, one is provided with for installing the installation pit 510 of described thermistor 50 at the outer rim position of described wall of trying to get to the heart of a matter, like this, described thermistor 50 is conducive to closer to described interior pot 1 thus can temperature-sensitive accurately.Two leads (511,512) are also provided with in addition on described wall of trying to get to the heart of a matter.Between described pot body 3 and described temperature-sensitive shell 51, be also provided with two springs (not shown in FIG.), described spring is set on described lead (511,512) respectively.The top of described outer upper casing 321 is provided with the erecting bed 3210 up protruded for a pair, on described erecting bed 3210, corresponding described lead (511,512) is provided with and dodges through hole (not shown in FIG.), screw is locked after dodging through hole described in described lead (511,512) passes, such screw can prevent described temperature-sensitive shell 51 from departing from described pot body 3, but does not hinder described temperature sensor 5 to move down.Secondly, under the effect of described spring, described temperature sensor 5 can be close to the top of described pot body 3 thus can sense the temperature of described pot body 3 accurately.Described threshold value of the present invention is with regard to the current signal of design sample a kind of specific size of described interior pot 1 outer upper megadyne temperature degree for described thermistor 50 corresponds in circuit or voltage signal for this reason.When the signal receiving unit of described central controller receives this specific signal, just think that the temperature outside of described interior pot 1 has reached described threshold value.
As shown in Figure 2, further technical scheme is, also comprises joint pin 7, and described joint pin 7 is connected to bottom described pot body 3 and between described heater 2, also be provided with back-moving spring 70 between bottom described heater 2 and described pot body 3, described back-moving spring 70 is set on described joint pin 7.
Wherein, first described joint pin 7 is the middle transition connector that described pot body 3 and described heater 2 are integrally connected, and secondly, because described back-moving spring 70 is set on described joint pin 7, described joint pin 7 also becomes the locator of described back-moving spring 70.According to technique scheme, described joint pin 7 assists to provide stable resiliency supported for institute's heater 2 with described back-moving spring 70 mutually, can also provide the space of floating downwards for described heater 2.
According to technique scheme, described stewing pot 100 processed can realize following method stewing processed, first needing food such as rice, the beans etc. of stewing system to be placed in described interior pot 1 with water, cover described pot cover 10, then start heater 2 described in described central controller controls and start the food in described interior pot 1 and pot and water heating.When heating described interior pot 1 and meeting threshold value, the water that part is not dryouied also is had significantly in described interior pot 1, described central controller also controls described heater 2 in response to described threshold value thereupon to be stopped heating and allowing described heater move away the certain spacing of described interior pot 1 for 2 times, described spacing is greater than 3 ㎜, in described in this relief, pot 1 utilizes waste heat to work on, realize from very hot oven to the conversion simmered, simmer the food in described interior pot 1.Like this, the automatic switchover that described " very hot oven " heating and " simmering " are heated, simmers pot 100 and is provided with beyond thought stewing effect processed described in making.The present invention is actually in the problem of the heat accumulation characteristic of the described interior pot 1 mainly avoided desired by existing precision Control Technology, contrary pattern is adopted mainly to utilize the heat accumulation characteristic of described interior pot 1 to adopt threshold value control model to realize simmering, substitute the high accuracy control method of existing price by more extensive simple control method, realization simmers and the temperature simmered in process reduces gradually and can not tie crispy rice.
Claims (13)
1. can form the method for stewing effect processed, comprise and simmer pot, the described pot that simmers comprises a pot body, central controller, the interior pot that can be placed in described pot body, covers the pot cover be pressed on described interior pot and the heater be arranged on below described interior pot, and whether described central controller can control described heater and generate heat; It is characterized in that: on described pot body, arrange the temperature sensor that can detect described interior pot temperature, described temperature sensor signal connects described central controller; Described interior pot is pottery class, boccaro class or building stones class pot courage, and described heater can move up and down; When heating described interior pot and meeting threshold value, described central controller is in response to described threshold value and control described heater thereupon and stop heating also allow under described heater moving away the certain spacing of described interior pot, in described in this relief, pot utilizes waste heat to work on, and realizes from very hot oven to the conversion simmered.
2. method according to claim 1, is characterized in that, described temperature sensor is arranged on the top of described pot body thus can checks the temperature of described interior pot outer upper position.
3. method according to claim 1 and 2, is characterized in that, the thickness of described interior pot is greater than 5 ㎜.
4. method according to claim 1 and 2, is characterized in that, described heater moves down the distance departing from described interior pot and is greater than 3 ㎜.
5. method according to claim 1 and 2, it is characterized in that, heating 2 to 5 minutes is continued when the temperature of described interior pot arrives the boiling temperature of water, described central controller is in response to described threshold value and control described heater thereupon and stop heating also allow under described heater moving away the certain spacing of described interior pot, in described in this relief, pot utilizes waste heat to work on, and realizes from very hot oven to the conversion simmered.
6. method according to claim 1 and 2, is characterized in that, described threshold value is set to corresponding to closing on the boiling temperature numerical value of water or/and correspond to the heat time of very hot oven stage enforcement.
7. what realize the arbitrary described method of claim 1 to 6 simmers Cooker structure, comprise a pot body, central controller, the interior pot that can be placed in described pot body, cover the pot cover be pressed on described interior pot and the heater be arranged on below described interior pot, described central controller controls described heater by gauge tap; It is characterized in that: on described pot body, arrange the temperature sensor that can detect described interior pot temperature, described temperature sensor signal connects described central controller, described interior pot is pottery class, boccaro class or building stones class pot courage; Described heater has the structure that can move up and down, described central controller has the threshold value in response to the described interior pot of heating and controls described heater thereupon and stops heating also allow under described heater moving away the certain spacing of described interior pot, realize from very hot oven to the heater control unit simmering conversion.
8. according to claim 7ly simmer Cooker structure, it is characterized in that, described threshold value is set to corresponding to closing on the boiling temperature numerical value of water or/and correspond to the heat time that the very hot oven stage implements.
9. according to claim 7 or 8, simmer Cooker structure, it is characterized in that, also comprise the elevating mechanism that described heater can be driven to move up and down, described elevating mechanism is connected with described central controller signal; Described elevating mechanism comprises driver and lever body, and the stage casing body of rod of described lever body is bearing in supporting point body; The head end of described lever body is fixedly attached on described heater, and tail end and described driver are in transmission connection; When described in described driver drives, the tail end of lever body moves up and down, described lever body is lifted up up and down around described supporting point body, thus drives described heater to move up and down by the head end of described lever body.
10. according to claim 9ly simmer Cooker structure, it is characterized in that, between the tail end and described driver of described lever body, be also provided with engaging mechanism, described engaging mechanism comprises upper and lower to the tooth bar arranged and the gear with described tooth bar engaged transmission; Described tooth bar is arranged on the tail end of described lever body, and described gear is arranged on also can around its rotating shaft rotation under the driving of described driver on described driver.
11. simmer Cooker structure according to claim 7 or 8, it is characterized in that, described temperature sensor is arranged on the top of described pot body thus can checks the temperature of described interior pot outer upper position.
12. simmer Cooker structure according to claim 7 or 8, it is characterized in that, also comprise joint pin, described joint pin is connected between described bottom of pot body and described heater, between described heater and described bottom of pot body, be also provided with back-moving spring, described back-moving spring is set on described joint pin.
13. simmer Cooker structure according to claim 7 or 8, it is characterized in that, also comprise for checking whether described heater arrives the upper limit position switch of upper extreme position, and comprise for checking whether described heater arrives the lower position switch of lower limit position.
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