CN201079286Y

CN201079286Y - Anti-overflow milk or soya-bean milk heating device

Info

Publication number: CN201079286Y
Application number: CNU2006200880604U
Authority: CN
Inventors: 王东兴; 赵涛; 翁炜; 李艳良
Original assignee: Yantai University
Current assignee: Yantai University
Priority date: 2006-08-16
Filing date: 2006-08-16
Publication date: 2008-07-02
Anticipated expiration: 2016-08-16

Abstract

The utility model relates to an overflow-preventing heating device of milk and soybean milk. The raw milk and raw soybean milk are very easy to overflow when heated; and the manual operation is time-consuming and labor-consuming; the soybean milk residue can stick to the heating pipe and the filter net when the automatic soybean milk machine is used, and the cleaning is inconvenient; moreover, the interior plastic material is easy to crack under high temperature for a long time, which reduces the service life; the detection of boil frothing by adopting temperature sensor or overflow-preventing electrode is not reasonable or reliable; moreover, a large amount of steam is in the heating chamber, which is easily condensed on the inner wall of the container and the sensor surface so as to form a conducting circuit which further influences the accuracy of signal. In the utility mode, the combination of a disk heater and a nonstick pan replaces the heating pipe and plastic container, which is even in heat transfer, has long life and is convenient to clean; the accuracy and reliability are increased by adopting two kinds of sensor to detect the boil frothing; nonstick polyfluortetraethylene accessories are used in the sensor structure so as to prevent the influence of steam.

Description

Anti-spilled milk, Soy milk heating apparatus

Technical field

Present technique relates to a kind of heater that can prevent that milk, soya-bean milk from overflowing.

Background technology

At present, when people boil raw milk and raw soya-bean milk, be to overflow when preventing to heat substantially by artificial guard, waste time and energy; Full-automatic soybean milk machine possesses the function of boiling raw soya-bean milk, but the soya-bean milk residue can stick on heating tube and the screen pack, cleans very inconvenience; In addition, the plastic material of soy bean milk making machine inside is under the higher temperature for a long time, is easy to generate crackle, thereby influences the life-span.

The heating of soya-bean milk is separated with preparing mechanism, make the filter screen of preparing mechanism be easy to clean, and use the metal pan that has non-sticking lining to make that also cleaning is more convenient in the heater; Compare with the use electrothermal tube, use disc type heater (as used in the ordinary electric rice cooker), have all advantages of even long service life of heat transfer: find by the heating experiment, when the amount of the milk that is heated, soya-bean milk not simultaneously, simple adopt temperature sensor or anti-flow electrode to seethe with excitement to foam detect and unreasonable, also unreliable; And, a large amount of water vapours is arranged in the heating clamber usually, condense in the accuracy that is split into conductive path on the inwall of container and the sensor surface and influences signal easily, so, in sensor construction, need to use sticking water material to eliminate this influence.

At present, about preventing that the patent that milk, heating soybean milk are overflowed from having a lot, still find to have the patent design of above-mentioned combination property as yet.

Summary of the invention

The purpose of this utility model is at the deficiencies in the prior art, discloses a kind of anti-spilled milk, Soy milk heating apparatus.

The anti-spilled milk of the utility model, Soy milk heating apparatus, it is characterized in that: this heater is by disc type heater (2), the metal pan (3) that has non-sticking lining and anti-spilled detecting element temperature sensor (20) and electric resistance sensor (18,19), and controller (21) is formed, temperature sensor 20 and electric resistance sensor (18,19) all are fixed on the top of pot, the inboard of lid.

The anti-spilled milk of the utility model, Soy milk heating apparatus adopt the disc type heating element heater and have the metal pan overall structure of non-sticking lining, the heat transfer efficiency height, and clean easily.

Be provided with temperature sensor above heater, when heating milk and soya-bean milk, the steam temperature that sensor records when foaming for the first time is lower, and, the amount difference of liquid, liquid level is also different with the distance of sensor, causes measurement result also different.So it is insecure depending merely on and detecting that the steam temperature judges whether to foam.For this reason, above heater, increased resistance sensor (anti-flow electrode) again.When foam rose to two electrodes of predetermined altitude contact, resistance between electrode can obviously reduce, from reducing to the Ω less than 100K more than about 1M Ω.Discern this resistance variations and just can judge whether foam touches electrode.

The boiling that the anti-spilled milk of the utility model, Soy milk heating apparatus comprehensively adopt temperature sensor and electric resistance sensor to detect milk, soya-bean milk is foamed.When the milk, soybean milk quantity of heating more after a little while, liquid level is far away from sensor, after foaming, foam needs the long period could contact electrode, during this, because a large amount of lather collapse causes the temperature in the heating clamber to raise more, in this case, reach a certain threshold value as judging that the condition that boiling is foamed is more reasonable with temperature; And when the milk, soybean milk quantity of heating more for a long time, liquid level is nearer from sensor, after foaming, foam just can contact electrode in the very short time, and the temperature and not really high in the heating clamber, in this case, with the foam contact electrode as judging that the condition that boiling is foamed is more reasonable.When the heating milk soya-bean milk, in the heating process after foaming for the first time, the steam temperature is higher always, spends between 100 degree about 90 greatly.In this case, need two sensors to be used especially and could accurately judge the situation of foaming.

The anti-spilled milk of the utility model, Soy milk heating apparatus are in initial heating period heating with full power, and at this moment, controller can be measured the speed that the steam temperature rises.Consider the waste heat effect after heating plate cuts off the power supply, reduce heating power gradually near boiling the time, too fast and out of control overflowing prevents to foam.But simultaneously, should guarantee that also enough heating powers keep liquid boiling.For this reason, the steam rate of rise in temperature of measuring according to the heating with full power stage, calculate change power and heat required approximate time, if at this section in the period, liquid not boiling foams, after then surpassing during this period of time, increase heating power in time, power gather way the steam temperature when being proportional to boiling and the difference of current steam temperature.

On the other hand, the anti-spilled milk of the utility model, Soy milk heating apparatus is characterized in that having used the polytetrafluoroethylmaterial material sleeve (16) that does not get wet in the structure of temperature sensor (20) and electric resistance sensor (18,19).

A large amount of steam are arranged in the working sensor environment,, in sensor construction, used the polytetrafluoroethylmaterial material sleeve that does not get wet, prevent that condensation vapor from forming conductive path and producing rub-out signal at container inner wall and sensor outside in order to eliminate its influence.

Description of drawings

Fig. 1 is the anti-spilled milk of the utility model, Soy milk heating apparatus structure vertical profile schematic diagram.

Fig. 2 is the exploded view of sensor construction.

The specific embodiment

Among Fig. 1,1 is heater housing, the metal pan 3 that has non-sticking lining is placed on the disc type heater 2,4 is the support of disc type heater, 5 is the passage sealing shroud, 6 is the passage loam cake, temperature sensor 20 and electric resistance sensor (18,19) are installed on the base plate 14 of lid 13 of non-stick pan 3 tops, 8 is the lead-in wire of temperature sensor, 7 and 9 is the lead-in wire of electric resistance sensor (18,19), controller 21 receives the signal of key commands, temperature sensor 20 and electric resistance sensor (18,19) on the controller, and controls the heating power of disc type heater 2 in view of the above.Temperature sensor 20 can be a RTD, and copper resistance also can be a thermistor.Electric resistance sensor in the present embodiment is pair of metal electrodes (18,19).

Controller 21 is formed structure and is comprised that microcomputer, temperature sensor signal modulate circuit, electric resistance sensor signal conditioning circuit, A/D change-over circuit, keyboard show and the heater power drive circuit.Wherein, the temperature sensor signal modulate circuit carries out conversion to sensor signal, filtering and amplification, export certain voltage signal, the electric resistance sensor signal conditioning circuit then compares two interpolar resistance and a fixing threshold resistance of electric resistance sensor, export a switching signal and give microcomputer, the A/D change-over circuit is converted to data signal with temperature analog signal and gives microcomputer, it is milk or soya-bean milk that keyboard is used to select institute's heated liquid, beginning and end with control heating process, the heater power drive circuit receives the switch command of microcomputer, and by a photoelectrical coupler (contain light isolate thyristor trigger) triggering-IGCT, and provide power drive to heater.

Among Fig. 2; temperature sensor 20 places protective casing 19; 19 have constituted an electrode of electric resistance sensor again; and draw by metallic gasket 11; be welded with an annulus on the sleeve pipe 19; be used on sleeve pipe 19, installing rubber sheet gasket 17, polytetrafluoroethylmaterial material sleeve 16 and rubber sheet gasket 15; with such mounting structure from the below is inserted into hole on the pot cover base plate 14; add rubber sheet gasket 12, metallic gasket 11; the top of sleeve pipe 19 is processed with screw thread, is used for said structure is fixed on base plate 14 with nut 10.

The structure of another electrode 18 of electric resistance sensor has similarly just replaced the sleeve pipe among Fig. 2 with a solid metal electrode.

Claims

1. an anti-spilled milk, Soy milk heating apparatus, it is characterized in that: this heater is by disc type heater (2), the metal pan (3) that has non-sticking lining and anti-spilled detecting element temperature sensor (20) and electric resistance sensor (18,19), and controller (21) is formed, temperature sensor 20 and electric resistance sensor (18,19) all are fixed on the top of pot, the inboard of lid.

2. anti-spilled milk according to claim 1, Soy milk heating apparatus is characterized in that having used the polytetrafluoroethylmaterial material sleeve (16) that does not get wet in the structure of temperature sensor (20) and electric resistance sensor (18,19).