CN205536504U - Device for heating liquids - Google Patents

Abstract

The utility model relates to a device for heating liquids, including main part and the heating element who is the tubular structure respectively, the heating element cover is outside the main part surface, and heating element comprises at the heating circuit of outer tube surface outer tube and printing, the main part comprises inner tube and helix, the inner tube both ends respectively with the sealed cooperation in outer tube both ends, form the inner chamber between outer tube and the inner tube, the helix constitutes with flexible sleeve by supporting the inner core, the flexible sleeve cover is established outside supporting the inner core, spiral outside of tubes including establishing is all tightly for the helix, during the helix compressed tightly the inner chamber between outer tube and inner tube, wherein, helix, inner tube and outer inside pipe wall enclosed the liquid circulation path of spirality jointly, and the upper and lower both ends that the main part corresponds liquid circulation path are equipped with liquid channel and liquid inlet channel. This kind of device for heating liquids has that simple structure is reasonable, fast, the energy consumption low grade advantage of heating response speed.

Description

Device for heating liquids

Technical field

This utility model relates to a kind of device for heating liquids, particularly one and is mainly used in water to be heated to be less than The device for heating liquids of steam-like temperature.

Background technology

Typically, in the heating electrical appliance needing to go out continuously hot water, by heating resistance wire by the parcel of insulating barrier or filling, It is embedded in the preferable cast aluminium of heat conductivity, stainless steel tube bending is formed continuous print flow channel for liquids simultaneously, be embedded in cast aluminium.

Because the heat that heating resistor produces can not directly and water carries out heat exchange, cast aluminium is first heated to a constant temperature by needs Degree, the heat on cast aluminium is exchanged by stainless steel tube flow channel for liquids and Aquatic product heat.Owing to the thermal inertia of aluminum is big, can exist below Problem: 1, when start, needs to wait longer second time 15 to 30S() preheating, cast aluminium could be heated to the temperature needed； If 2 in the case of going out hot water continuously, the heat that heating resistance wire produces can not catch up with the heat that liquid absorbs, meeting in time The temperature causing cast aluminium declines, if the water temperature needed can not decline, needs to continue waiting for heating；If 3 heaters are in treat In machine, needs control to come the temperature of constant cast aluminium, cause the waste of the energy；4, the cast aluminium with this high thermal inertia heats Device, it is necessary to obtained the water of steady temperature by preheating, when continuous effluent, water temperature can not be constant.Because the inertia of high heat, More can not realize the consecutive variations regulation of water temperature.The complex manufacturing of cast aluminium simultaneously, volume is big, Heavy Weight.

Based on above problem, there are some schemes to go to improve, as done plastic liquid runner in rustless steel thick film pipe, come Avoiding the impact of thermal inertia, plastics have certain hardness, need to be inserted in rustless steel outer tube, it is possible to be easily inserted in rustless steel In pipe, dimensional fits needs to reduce the external diameter of plastic liquid runner, it is impossible to realize tight fit.It is no problem to install, but can carry The problem sealed, causes water can not flow fully according to the flow direction of flow channel for liquids, and always some water can be from poorly sealed reality Gap at take a shortcut, water stream channel is certain, inevitably results in a part of water and does not flows, becomes stagnant water, in this place continuous heating, Ultimately resulting in gasification, produce steam ejection, water outlet is intermittent, simultaneously as the intermetallic sealing of plastic casing can only rely on sealing Circle seals, it is impossible to realize the requirement of storage pressure 8 to 10bar, in normal pressure, it is also possible to because speed or sealing ring are at the environment of high temperature Life-time service and occur aging, the risk of leakage occurs.

Utility model content

The purpose of this utility model is the deficiency overcoming above-mentioned prior art to exist, and provides a kind of simple in construction, conjunction Reason, heating fast response time, the device for heating liquids that energy consumption is low.

The purpose of this utility model is achieved in that

A kind of device for heating liquids, including main body in tubular structure respectively and heater element, heater element set Outside body surfaces, heater element is made up of outer tube and the heating circuit being printed on outer tube outer surface, it is characterised in that described master Body is made up of inner tube and helix, and inner tube two ends seal with outer tube two ends respectively and coordinate, and form inner chamber, spiral shell between outer tube and inner tube Spin line is by supporting inner core and soft set is constituted, and soft set is set in outside support inner core, and helix spiral winding tightly is located at inner tube periphery； Helix is pressed in the inner chamber between outer tube and inner tube, and wherein, helix, inner and outer tubes inwall surround spiral jointly Fluid flow path, the two ends up and down of main body correspondence fluid flow path are provided with liquid outlet channel and feed pathway.

Spiral fluid flow path defines liquid helical flow, hands over such that it is able to do sufficiently heat with heater element Change.For liquid and heater element, to realize the contact area of large-area heat exchange, body element and heater element sufficiently small, Ensure that the heat that heater element produces passes to liquid in time, so using helix to be separated out spiral fluid flow passageway Footpath, reduces helix and outer tube contact area.Can also allow on heating resistor by the temperature of body element covering part not simultaneously Can be too high, useful to main body heater element.In order to liquid flowing is smooth and easy, spiral helicine fluid flow path is needed to have certain Arranging of linear velocity and angular velocity, i.e. fluid passage road needs certain angle of inclination, is unlikely on fluid passage to form resistance Power.Because proportion declines after heated liquid, the liquid of heat always can flow up.

The purpose of this utility model can also use techniques below measure to solve:

As more specifically one scheme, described outer tube and inner tube are stainless pipe, inner tube two ends respectively with outer tube two End is sealed by welding manner.

Said inner tube is respectively arranged at two ends with flanging, flanging and outer tube port sealing.In order to realize storage pressure, in main body two End outward flanging, then after being inserted in heater element, is formed main body and heater element by the mode of welding and seals structure, it is ensured that < The storage pressure energy power of 50Bar.Welding can reliably realize sealing, and liquid will not be revealed.

As further scheme, said inner tube is centrally formed cavity, is provided with feed tube and drain pipe, feed tube in cavity Connect with feed pathway and liquid outlet channel respectively with drain pipe.Owing to inner tube uses the stainless steel tube of 0.5 to 1.0mm, in pipe Form a cavity, reduce stainless quality, reduce thermal inertia.

As more preferably scheme, the wall thickness of described outer tube and inner tube is respectively 0.5mm to 1mm.The inner core of described helix For stainless steel silk, soft set is silica gel sheath or plastic sheath (preferably silica gel sheath), and inner core diameter is 0.5mm to 3mm, and soft sleeve wall thickness is 0.5mm to 3mm；Stainless steel silk two ends are welded and fixed with inner tube.

The main body of this kind of device for heating liquids is made up of inner tube and helix, and main body thermal inertia is used to less than the heat of aluminum Amount, the residual water in passage is 6ml simultaneously.Heating element heater have have silk-screen with adding on the surface apparent surface of main body Thermal resistance.The steel pipe thickness of main body is 0.5mm, if calculated according to the specification of 2000W, a length of 62mm, external diameter is 43mm, weight Amount is 3.14mm*43mm*62mm*0.5mm/1000*7.9g/cm3=33.14g, and stainless specific heat is 0.49J/(g. DEG C), as The main body of 25 DEG C is heated to 85 DEG C by fruit, and the heat adding heat absorption is: 0.49J/(g. DEG C) * 33.14g*(85-25) DEG C ≈ 974J.Heat time heating time needs: 974J/2000W ≈ 0.48S, the most individually considers the thermal inertia of main body, it is only necessary to 2s i.e. can be with temperature rise 65℃.Adding the residual water in heat pipe is 6ml=6g, if being heated to 85 DEG C from 25 DEG C, the heat of absorption is: 4.2J/(g. DEG C) * 6g*(85-25) DEG C=1512J.Heat time heating time needs: 1512J/2000W ≈ 0.76S, i.e. needs main body and residual water temperature rise 60 DEG C time only need 0.48S+0.76=1.24S.

Simultaneously as the insulant of the thickness added between thermal resistance and rustless steel only about 83um, and with good Laterally thermal conductivity coefficient rustless steel combines, thus the thermal inertia of auxiliary heater element is the least, decreases heat losses. So, can uniformly heat on the big surface of liquid, so improve heater element due to this silk-screen type heater element Total thermal conductance efficiency.

The liquid heat that quickly also almost all acceptance passes over from silk-screen resistance, then liquid just can add in a flash Heat.So when device does not works, being not required to provide substantial amounts of energy to make it keep enough high temperature, heating at this moment The energy expenditure of device is zero.

Described heating circuit includes insulating bottom layer, heating resistor and the insulating outer layer printing burning successively at outer tube outer wall, insulation The heating energization input with heating resistor conductive contact it is additionally provided with on bottom.Described heating resistor is the most just to liquid communication Path so that the heat that heating resistor produces is absorbed by the liquid flowing through fluid flow path as far as possible.Meanwhile, the rail of heating resistor Mark is between the liquid level that liquid in-out passage is formed, and the liquid level that i.e. liquid in-out passage is formed comprises the track of heating resistor, it is ensured that work When making, the heat that heating resistor produces transmits liquid in time, is unlikely to burn heating resistor because of overheated.

Described heating resistor is at least formed by one layer of resistance slurry sintering, and it is provided with a plurality of from top to bottom, each bar heating resistor Being parallel to each other, connected by conduction access bridge between adjacent two heating resistors, the heating resistor at upper and lower two ends supplies with heating respectively Electrical input is conductively connected.

It is additionally provided with temperature controlling device on the insulating bottom layer of described heating circuit.

Described temperature controlling device includes temperature control temperature sensing device and/or anti-dry temperature sensing device, and heating circuit is additionally provided with The temperature acquisition electrode being electrically connected with temperature controlling device；Wherein, temperature control temperature sensing device is positioned close at liquid outlet channel and uses up Amount is away from heating resistor；Anti-dry temperature sensing device is positioned at by heating resistor.Owing to the purpose of temperature control temperature sensing device is mainly Detecting liquid temp and feed back to control circuit, control circuit is according to surveying out needed for liquid temp data and user set out liquid Temperature compares, and is automatically adjusted the power of heating resistor, it is achieved accurately temperature control.Therefore, temperature control temperature sensing device close proximity to Liquid outlet channel can obtain the liquid temperature closest to liquid outlet channel, but simultaneously again away from heating resistor, in order to avoid by heating resistor shadow Ring its measure data, i.e. temperature control temperature sensing device liquid have left just to heating resistor path after, outlet before Just position to liquid.Heating resistor is to when in fluid flow path, liquid heats, and heating resistor occurs heat with liquid Exchange, so temperature declines, if but when lacking liquid, quickly, there is over-temperature condition in the temperature rise of heating resistor, so, anti-dry Burning temperature sensing device needs to be positioned close to the position of heating resistor.

The beneficial effects of the utility model are as follows:

(1) this kind of device for heating liquids can reduce start preheating the waiting time at about 3 seconds, continuous effluent temperature Stable, when standby, it is not necessary to rely on heating to maintain the temperature of cast aluminium；

(2) this kind of device for heating liquids is avoided that because of the seam between flow channel for liquids and rustless steel thick film heater Gap, the string water problems brought causes gasification, and that brings goes out steam and discontinuous water outlet；

(3) this kind of device for heating liquids by inner and outer tubes use welding mode seal, can bear storage pressure < The requirement of 50bar, it is to avoid life-time service leakage；

(4) this kind of device for heating liquids simple in construction, cheap for manufacturing cost；

(5) this kind of device for heating liquids can produce rapidly temperature water between 60 DEG C to 98 DEG C, simultaneously need to Storage pressure < 50bar, is applicable to electric coffee maker, espresso maker and beverage heater etc., meet coffee or beverage mouthfeel and The extraction of nutrition；

(6) this kind of device for heating liquids can obtain continuous-stable temperature or transformation temperature in initial and any time Water.

Accompanying drawing explanation

Fig. 1 is this utility model one embodiment decomposition texture schematic diagram.

Fig. 2 is structural representation after Fig. 1 assembles.

Fig. 3 is that this utility model looks up structural representation.

Fig. 4 is the A-A sectional structure schematic diagram of Fig. 3.

Detailed description of the invention

Below in conjunction with the accompanying drawings and this utility model is further described by embodiment:

Seeing shown in Fig. 1 to Fig. 4, a kind of device for heating liquids, including main body 20 He in tubular structure respectively Heater element 10, heater element 10 is enclosed within outside main body 20 surface, and heater element 10 is by outer tube 1 and is printed on outer tube 1 outer surface Heating circuit constitute, it is characterised in that described main body 20 is made up of inner tube 6 and helix 5, inner tube 6 two ends respectively with outer tube 1 liang Holding to seal and coordinate, form inner chamber between outer tube 1 and inner tube 6, helix 5 is made up of support inner core and soft set, and soft set is set in and props up Outside support inner core, helix 5 spiral winding tightly is located at inner tube 6 periphery；Helix 5 is pressed on the inner chamber between outer tube 1 and inner tube 6 In, wherein, helix 5, inner tube 6 and outer tube 1 inwall surround spiral fluid flow path 7 jointly, the corresponding liquid of main body 20 The two ends up and down of circulation path 7 are provided with liquid outlet channel 62 and feed pathway 63.

Described outer tube 1 and inner tube 6 are stainless pipe, and inner tube 6 two ends are close by welding manner with outer tube 1 two ends respectively Envelope.

The wall thickness of described outer tube 1 and inner tube 6 is respectively 0.5mm to 1mm.

Said inner tube 6 is respectively arranged at two ends with flanging 64, flanging 64 and outer tube 1 port sealing.

Said inner tube 6 is centrally formed cavity 61, is provided with feed tube 66 and drain pipe 65 in cavity 61, feed tube 66 and go out liquid Pipe 65 connects with feed pathway 63 and liquid outlet channel 62 respectively.

Described heating circuit includes insulating bottom layer 2, heating resistor 3 and the insulating outer layer printing burning successively at outer tube 1 outer wall, absolutely It is additionally provided with on edge bottom 2 and the heating energization input 32 of heating resistor 3 conductive contact.

Described heating resistor 3 is at least formed by one layer of resistance slurry sintering, and it is provided with a plurality of from top to bottom, each bar heating resistor 3 are parallel to each other, between adjacent two heating resistors 3 by conduction access bridge 31 connect, the heating resistor 3 at upper and lower two ends respectively with add Hot energization input 32 is conductively connected.

It is additionally provided with temperature controlling device on the insulating bottom layer 2 of described heating circuit.

Described temperature controlling device includes temperature control temperature sensing device 41 and anti-dry temperature sensing device 42, and heating circuit is additionally provided with The temperature acquisition electrode 43 being electrically connected with temperature controlling device；Wherein, temperature control temperature sensing device 41 is positioned close to liquid outlet channel 62 Locate and try one's best away from heating resistor 3；It is other that anti-dry temperature sensing device 42 is positioned at heating resistor 3.

The inner core 51 of described helix 5 is stainless steel silk, and soft set is silica gel sheath or plastic sheath, a diameter of 0.5mm of inner core 51 To 3mm, soft sleeve wall thickness is 0.5mm to 3mm；Stainless steel silk two ends are welded and fixed with inner tube 6.When helix 5 coordinates with inner tube 6, First being welded and fixed with inner tube 6 stainless steel silk one end, strain helix, spiral wound, at the end being wound around by welding admittedly Fixed.Certainly, if needing spiral type 5 to position well, the anchor points such as locating slot can be provided with in inner tube 6 periphery.

Or, it is similar to spring for making the stainless steel silk of inner core 51, when helix 5 is arranged on inner tube 6 periphery, spiral shell Spin line 5 is automatic tightening under stainless steel silk elastic force effect, adds the frictional force of soft set and inner tube so that outside helix 5 is with inner tube 6 Wall is formed good fit, and inner tube 6 outer wall i.e. forms the helicla flute of required form, then after coordinating with outer tube 1, is i.e. formed spiral Fluid flow path 7.

In above-described embodiment: device for heating liquids is by a spiral on rustless steel inner tube 6 outer surface spiral winding Main body 20 and the heater element being set in outside main body 10 of line 5 are constituted, and heater element 10 is had heating electric by surface print burning The rustless steel outer tube 1 on road is constituted, main body 20 and heater element 10 two ends welded seal, the fin 52 of binding silica gel set 5 so that main Forming the fluid flow path 7 that spiral type rises between body 20 and heater element 10, water enters liquid along the feed tube 66 of lower section Shape of spinning in circulation path 7 ascending motion, water is in flow process, and the heat that heater element 10 produces passes to the interior table of outer tube Face, and flowing water realize heat exchange after flow out from drain pipe 65.

Owing to inner tube 6 uses the stainless steel tube of 0.5 to 1.0mm, in pipe, form a cavity 61, reduce stainless matter Amount, reduces thermal inertia.Consider the ability to bear of pressure 50bar simultaneously, after realizing welding for same outer tube 1 two ends, have an annulus Cavity structure, by inner tube two ends outward flanging 64.

A diameter of 0.5 to the 3mm of above-mentioned stainless steel silk, the thick end of helix is 0.5 to 3mm, in this programme, rustless steel silk thread Footpath is φ 0.8mm, and the silica gel thickness of parcel is 0.5mm, and helix wire distribution distance is 10.5mm, and i.e. fluid flow path 7 is deep Degree is much smaller than width, and liquid is when fluid flow path 7 flows, and large area absorbs the heater element 10 inner surface via outer tube 1 The heat of transmission.Generally, outer tube 1 all makes high laterally thermal conductance and the shape of low thermal inertia, in order to realize laterally passing rapidly Heat, needs the thickness that most probable is little, but in order to bear the pressure of 50bar, in this example, uses the thickness rustless steel of 0.8mm. The principle of the selection of material, to pass through silk-screen heating circuit on its surface.

The silk-screen of heating circuit: burn one layer of insulating dielectric materials (insulating bottom layer), according to need in rustless steel outer pipe surface print Wanting can to improve insulation by three layers or four layers of insulation pressure, print burns electrode material, it is achieved electrical connection, and then print burns heating electric Resistance, on the surface of heating resistor, print burns one or more layers insulating protective layer (insulating outer layer).The power of heater element typically exists 1200 to 2800W, determines peak power scope according to water flow and leaving water temperature.

Because the whole passage of fluid flow path 7 is not the track of a straight line, after being heated according to water, density subtracts simultaneously Little, that hot water flows up principle, it is impossible to rely on the flowing of gravitational force urges water, because there being the requirement of storage pressure, needs a storage pressure Water pump promote water flowing.

Integrated temperature control temperature sensing device 41(NTC temperature sensing device on heating circuit outside outer tube 1), temperature control temperature sensing device 41 by the temperature of liquid in the thickness perception fluid flow path 7 of insulating bottom layer 2 and outer tube 1, in order to ensure the accurate of measurement Property and constantly property.Temperature control temperature sensing device 41 be arranged in from heating resistor slightly away from position, it is to avoid the temperature of heating resistor is to control The temperature interference of temperature sensing device 41.

Integrated another NTC temperature sensing device of anti-dry temperature sensing device 42(on outer tube 1), prevent in anhydrous dry combustion method or heating Resistance just to inner surface fouling time, be able to detect that within the shortest time by dry combustion method or the assembly situation of incrustation scale, distance Near heating resistor, particular location needs to determine according to time or the threshold temperature of dry combustion method.

With temperature sensing device 41 operationally, in measurement fluid flow path 7, the temperature of liquid, returns to PCB control to temperature control, By calculating the power of regulation heating resistance 3, control leaving water temperature and reach required value.

When anhydrous dry combustion method or heating resistor occurring just to a large amount of attachment incrustation scale on outer tube 1 inner surface, heater element produces Raw heat can not laterally be taken away, and temperature steeply rises, and laterally delivers heat to anti-dry temperature sensing device 42, when arriving setting During threshold temperature, automatically cut off power supply and heater element is realized overtemperature protection.

When just starting to start, for ensureing that leaving water temperature is the temperature of requirement, first temperature control temperature sensing device 41 is measured The temperature of liquid in fluid flow path 7, calculates according to Current Temperatures and leaving water temperature and preheats conduction time, arrive when preheating time After reaching, pump working, in order to reduce the temperature oscillation cycle, shorten hygral equilibrium set up time, ought for the previous period in root According to calculate determine a constant power, the boundary condition of calculating includes: inflow temperature, leaving water temperature, flow, running voltage, The rated power etc. of device.After this period completes, the temperature returned by measurement, the power of control and regulation heater element, Form closed loop control, until after heat time heating time or water yield reach, quitting work.

In control technology, in addition to controlling the power of heating resistor 2, it is also possible to select to control the flow of water pump.Preheating After time reaches, determining a constant flow according to calculating within for the previous period, the boundary condition of calculating includes: water inlet temperature Degree, leaving water temperature, flow, running voltage, the rated power etc. of device.After this period completes, the temperature returned by measurement Degree, the flow of control and regulation water pump, form closed loop control, until after heat time heating time or water yield reach, quitting work.

Actually using this device, according to calculating and repeatedly actual test, when just starting to start, maximum duration exists Can go out the hot water of 85 DEG C in 3S, temperature stabilization sets up the time in 3S, and temperature stabilization is in +/-2 DEG C.During preheating in 3S Between be the shortest, it is not necessary to when standby, be always maintained at constant holding temperature, it is to avoid because the standby energy waste brought.

To sum up being told, have many advantages according to device of the present utility model, particularly, it has the least thermal inertia. Thus, when powering to heater element, hot water just can be gone out through the shortest time.

The structure of water channel is only the passage of an opposing seal, will not result in steam because of string water or current continue absolutely Continuous, safe risk, continuous effluent will not be brought because of the ejection of steam to bring the stable mood of user and to experience.

In the structure of water stream channel, use all-welded sealing means, it is possible to bear the storage pressure of maximum 50bar, full Foot coffee or beverage mouthfeel and the extraction of nutrition.Avoid because other seals the leakage problem that structure is brought.

NTC temperature sensor uses integrated mode, and the heat exchange of water is seamless structure, in NTC temperature sensing Whole of device measures temperature by the thinnest insulating barrier and rustless steel, and thermal response time is short, temperature control temperature sensing device 41 thermometric Promptly and accurately, it is achieved accurate temperature controls, and anti-dry temperature sensing device 42 detects sensitive, is reliably achieved overtemperature protection, nothing Need extra mounting structure, low cost.

Claims (10)

1. a device for heating liquids, including main body (20) in tubular structure respectively and heater element (10), heating Element (10) is enclosed within outside main body (20) surface, and heater element (10) is by outer tube (1) and the heating electric that is printed on outer tube (1) outer surface Road constitute, it is characterised in that described main body (20) is made up of inner tube (6) and helix (5), inner tube (6) two ends respectively with outer tube (1) two ends seal and coordinate, and form inner chamber between outer tube (1) and inner tube (6), and helix (5) is made up of support inner core and soft set, soft Being set in outside support inner core, helix (5) spiral winding tightly is located at inner tube (6) periphery；Helix (5) is pressed on outer tube (1) in the inner chamber and between inner tube (6), wherein, helix (5), inner tube (6) and outer tube (1) inwall surround spiral jointly Fluid flow path (7), the two ends up and down of the corresponding fluid flow path (7) of main body (20) are provided with liquid outlet channel (62) and feed liquor leads to Road (63).

The most according to claim 1, device for heating liquids, is characterized in that, described outer tube (1) and inner tube (6) are not Rust cylindrical steel tube, inner tube (6) two ends are sealed by welding manner with outer tube (1) two ends respectively.

The most according to claim 2, device for heating liquids, is characterized in that, described outer tube (1) and the wall thickness of inner tube (6) It is respectively 0.5mm to 1mm.

4. according to device for heating liquids described in Claims 2 or 3, it is characterized in that, said inner tube (6) is respectively arranged at two ends with Flanging (64), flanging (64) and outer tube (1) port sealing.

The most according to claim 4, device for heating liquids, is characterized in that, the inner core (51) of described helix (5) is Stainless steel silk, soft set is silica gel sheath or plastic sheath, inner core (51) a diameter of 0.5mm to 3mm, and soft sleeve wall thickness is 0.5mm to 3mm； Stainless steel silk two ends are welded and fixed with inner tube (6).

The most according to claim 1, device for heating liquids, is characterized in that, said inner tube (6) is centrally formed cavity (61), it is provided with feed tube (66) and drain pipe (65), feed tube (66) and drain pipe (65) in cavity (61) to lead to feed liquor respectively Road (63) connects with liquid outlet channel (62).

The most according to claim 1, device for heating liquids, is characterized in that, described heating circuit includes that printing burning successively exists The insulating bottom layer (2) of outer tube (1) outer wall, heating resistor (3) and insulating outer layer, insulating bottom layer is additionally provided with and heating resistor on (2) (3) the heating energization input (32) of conductive contact.

The most according to claim 7, device for heating liquids, is characterized in that, described heating resistor (3) is at least by one layer Resistance slurry sintering forms, and it is provided with a plurality of from top to bottom, and each bar heating resistor (3) is parallel to each other, adjacent two heating resistors (3) Between connected by conduction access bridge (31), the heating resistor (3) at upper and lower two ends is respectively with heating energization input (32) conduction even Connect.

9. according to device for heating liquids described in claim 7 or 8, it is characterized in that, the insulating bottom layer of described heating circuit (2) temperature controlling device it is additionally provided with on.

The most according to claim 9, device for heating liquids, is characterized in that, described temperature controlling device includes that temperature control is felt Temperature device (41) and/or anti-dry, with temperature sensing device (42), heating circuit are additionally provided with the temperature being electrically connected with temperature controlling device Acquisition electrode (43)；Wherein, temperature control temperature sensing device (41) is positioned close to liquid outlet channel (62) place and as far as possible away from heating electric Resistance (3)；It is other that anti-dry temperature sensing device (42) is positioned at heating resistor (3).