CN203802265U - Water dispenser capable of quantitatively outputting water at fixed temperature - Google Patents

Abstract

The utility model discloses a water dispenser capable of quantitatively outputting water at fixed temperature. The water dispenser capable of quantitatively outputting water at fixed temperature comprises a shell, a hot water container with a heat insulating function, a hot water pump assembly which is used for outputting hot water, a water delivery pump assembly which is used for filling water into the hot water container, a cold water and hot water mixer which is used for mixing normal-temperature water with the hot water and a controller which is used for controlling the water dispenser to work, wherein a heating device is arranged in the hot water container and a temperature sensor and a liquid level detection device are arranged in the hot water container. By using the water dispenser capable of quantitatively outputting water at fixed temperature, the normal-temperature water pump assembly and the hot water pump assembly are respectively controlled to input the normal-temperature water and the hot water into the cold water and hot water mixer at fixed speed or output quantity according to the required temperature, the normal-temperature water and the hot water are mixed and output and the water at the required temperature or in the required quantity can be obtained.

Description

A kind of water dispenser that can quantitative constant temperature water outlet

Technical field

The utility model relates to a kind of water dispenser, relates in particular to a kind of water dispenser that can quantitative constant temperature water outlet.

Background technology

Have in the market temperature adjustment immediately the water dispenser of effluent functions seldom especially lack water dispenser that can quantitative constant temperature water outlet.Along with growth in the living standard, people are more and more higher to the requirement of drinking-water, accurately constant temperature and quantitative drinking water machine become people in daily life many aspects in the urgent need to, for example rush the water of baby milk and not only want specific temperature range also to need to export accurately the water yield, if the tealeaves of different types wants that the temperature that brews effect institute water that reaches best must approach as much as possible the best and brew temperature.In the angle using, people wish that such water dispenser is water outlet at once, regulation output water temperature and the water yield easily, and be that a volume is small and exquisite, also wishes that the epoch people that advocate energy-conserving and environment-protective such product is energy-conserving and environment-protective and the product that cuts the waste.

The water dispenser patent documentation relevant with the water dispenser retrieving on market at present, the water dispenser of realizing adjustable temperature output mainly contains directly water is heated to assigned temperature and mixes two kinds of modes by hot and cold water in water yield ratio.

Direct-fired mode is also referred to as immediate heating type water dispenser, the water dispenser of this mode not only exists distribution power high, temperature control effect is poor, water outlet need to be waited for etc. substantially insoluble problem, and will take measures to solve problem less than normal such as fouling, flow velocity, to go out water projection etc. and make the complex structure cost of machine high.There are at present a lot of disclosed water dispenser patents to make in this way, but are all not realize accurate constant temperature and quantitatively export around addressing the above problem substantially.

The mode that adopts hot and cold water to mix in water yield ratio is to realize the preferably scheme of one ratio of temperature-regulating drinking fountain in the middle of current technology, publication number is the water dispenser that the Chinese invention patent application of CN1500432A discloses a kind of temp. controllable, this utility application has proposed two schemes and has realized the mixing in proportion of water, with controlling the mode of magnetic valve make-and-break time and by controlling the flow of cold and hot two electric pumps.By controlling the magnetic valve control output temperature that such mode can only be very general conduction time and unstable.The mode of the flow by controlling hot and cold water two electric pumps is theoretic preferred plan, but this utility application exists following problem: if 1. hot water tank does not propose thermal-insulating scheme and makes to want to allow that the water of hot water tank is constant must repeatedly heat and will consume a large amount of electric energy frequently in a certain temperature.Even if 2. this utility application proposes thermal-insulating scheme, if but this scheme of temperature that need to approach the water of 100 degree just must allow the water termostat in hot water tank approach 100 degree, so also can the more electric energy of consumption rate, will make the scope of application reduce and make troubles if reduce maximum temperature, such as what embody in its method for regulating temperature, selected temperature can only be between its high temperature water pot and the current water temperature of low temperature water pot, the water that exceeds this range temperature can not obtain, and therefore its scope of application is limited.3. disclosed technical scheme is difficult to realize and allows water mix in accurate ratio, and not how proposition does not realize accurate flow-control.4. the output that wants to realize cold water, hot water must three containers, and heating jug, tank for making cold, normal temperature drinking water aqua storage tank etc. all adopt existing common structure, separate separately, whole water dispenser complex structure, and compact not, volume is large.

In addition, in the water dispenser of prior art, mostly can have a defect,, in the time of output higher temperature water, water yield can be less conventionally, and the water intaking stand-by period is long.

Utility model content

For overcoming the defect of above-mentioned prior art, technical problem to be solved in the utility model be to provide a kind of can the water outlet of accurate quantification constant temperature and can export immediately the water dispenser of the arbitrary water yield water of arbitrary temperature.

The purpose of this utility model is also to provide a kind of water dispenser of more energy-conserving and environment-protective.

Another object of the present utility model be to provide a kind of in the time of quantitative constant temperature water outlet the large water dispenser of water yield, especially, in the time of output higher temperature water, also can preferentially ensure that water yield is large, the water intaking stand-by period is short.

The utility model also provide a kind of compact conformation, volume small and exquisite can quantitative constant temperature water outlet water dispenser.

For solving the problems of the technologies described above, realize above-mentioned purpose, the technical scheme that the utility model is taked is:

Water dispenser that can quantitative constant temperature water outlet, described water dispenser comprises shell; Normal-temperature water container, for exporting the normal temperature water pump component of normal-temperature water, is provided with temperature sensor in normal-temperature water container; There is the hot water tank of heat insulation function, for exporting the heat-exchanger pump assembly of hot water, in described hot water tank, be provided with heater, in hot water tank, be provided with temperature sensor and liquid level detection device; Give the transportation water pump assembly of hot water tank water filling; Be used for the hot-and-cold water mixer of normal-temperature water and hot water mixing; Control the controller of water dispenser work.Respectively input normal-temperature water and hot water with given pace (flow) toward hot-and-cold water mixer by controlling normal temperature water pump component and heat-exchanger pump assembly, and through mixing output, can obtain temperature required water, control respectively normal temperature water pump component and heat-exchanger pump assembly simultaneously and export a certain amount of normal-temperature water and hot water by flow separately, can quantitatively obtain temperature required water.And according to user's operation, water dispenser can be exported the water of the arbitrary water yield of arbitrary temperature immediately.Hot water tank is designed with heat insulation function, can meet hot water tank export when needed hot water (for mix with normal-temperature water or for direct water outlet), and there is the effect of energy-conserving and environment-protective simultaneously.

Preferably, described normal temperature water pump component and heat-exchanger pump assembly adopt constant displacement pump.Preferred, constant displacement pump adopts gear pump.Use gear pump, by the rotary speed of its gear, can control its output discharge, by rotating cycle, can control water yield.

Further, described constant displacement pump is connected with encoder, encoder is set and can revises in real time the corresponding relation between rotating speed and flow.Taking gear pump as example, the encoder rotating speed and the number of turns turning over of detection of gear pump is in real time set, thus constant speed quantitative water delivery more accurately.In running, the umber of pulse that can constantly return to encoder feedback with certain hour interval is compared and works, the output controlled quentity controlled variable of adjustment that can be real-time and correction gear pump makes the flow of two pumps carry out work according to the ratio of specifying, and whether detection in real time arrives the predetermined water outlet water yield, guarantee constant speed quantitative, constant speed (the especially mixing of hot water and normal-temperature water, to the accurate control of flow separately, could further ensure the accuracy of the flow proportional of hot water and normal-temperature water, with ensure leaving water temperature accurately) quantitatively (ensured water yield accurately) ensured to greatest extent accurately constant temperature quantitative-outlet.

As the improvement of a kind of water dispenser technical scheme that can quantitative constant temperature water outlet of the utility model, the heat-exchanger pump of described hot water tank is installed on described hot water tank inside by a stand tube that stretches into described hot water tank, the power transmission shaft of described heat-exchanger pump is located in described stand tube, and the outer end of power transmission shaft is connected or connects by shaft coupling with the motor-driven being installed on outside hot water tank.Like this, in the time of concrete installation, heat-exchanger pump can be arranged at container bottom, and motor is arranged at external container, has solved and has allowed motor be placed on to be heated in hot water tank the problem of cisco unity malfunction.

As the preferred mode of one, described power transmission shaft and motor belt transmission, the belt pulley on belt pulley and power transmission shaft on motor arranges for slowing down.Certainly, power transmission shaft also can with other kinds of drive such as motor gear transmission.Described encoder can preferably be installed on the belt pulley of described motor, because the belt pulley of motor and the belt pulley of power transmission shaft arrange for slowing down, the belt pulley that is motor is small belt pulley, encoder is installed on the belt pulley of motor, so, accordingly, the coding disk of encoder also can less (with respect to being arranged on the big belt pulley of power transmission shaft), is conducive to the compactness of water dispenser internal structure.

As the improvement of a kind of water dispenser technical scheme that can quantitative constant temperature water outlet of the utility model, the water inlet of the pump head of heat-exchanger pump assembly is located at bottom, and delivery port is located at top.Certainly, this is nonessential, and only water inlet is located at bottom, and delivery port is located at top, more meets the needs of current.Adopt other layouts, certainly also belong in protection domain of the present utility model.

As the improvement of a kind of water dispenser embodiment that can quantitative constant temperature water outlet of the utility model, the normal temperature water pump of described normal-temperature water container is installed on described normal-temperature water container bottom by a stand tube that stretches into described normal-temperature water container, the power transmission shaft of described normal temperature water pump is located in described stand tube, and outer end is connected with the motor-driven being installed on outside normal-temperature water container.Preferably, the power transmission shaft of the normal temperature water pump in described normal-temperature water container and motor belt transmission, the belt on belt pulley and power transmission shaft on motor arranges for slowing down, and described encoder is installed on the belt pulley of motor.The mounting structure of the heat-exchanger pump assembly in mounting means and the hot water tank of the normal temperature water pump in normal-temperature water container is basic identical.

As the improvement of a kind of water dispenser embodiment that can quantitative constant temperature water outlet of the utility model, described heat-exchanger pump and normal temperature water pump are except adopting above-mentioned gear pump, also can adopt other water pumps, such as, as the another kind of alternative of gear pump, membrane pump is also a kind of selection, and membrane pump can not be arranged in water dispenser container, but the cost of membrane pump is higher, and noise is larger.In addition, if do not need strictly to control the flow of water, i.e. quantitative constant temperature water outlet, so, centrifugal pump is also a kind of interchangeable scheme.

As the improvement of a kind of water dispenser technical scheme that can quantitative constant temperature water outlet of the utility model, described normal temperature water pump and the described transportation water pump of giving hot water tank water filling are same pump, adopt and comprise that two valves and two delivery ports can send water or the two-way pump to described hot water tank water filling to described hot-and-cold water mixer respectively.

As the improvement of a kind of water dispenser technical scheme that can quantitative constant temperature water outlet of the utility model, the heater in described hot water tank can carry out to the water of hot water tank post bake in exiting water process.In the utility model, the water in hot water tank is defined as once and is heated by heater heating before heat-exchanger pump is carried, and water in hot water tank is carried in water-supply-pipe course of conveying and again heated and be defined as post bake by heater by heat-exchanger pump.By the design of post bake, water in hot water tank can be incubated the temperature lower at, when needs output is during higher than the hot water of the temperature of the insulation water of hot water tank, regulate the power (if desired in conjunction with the flow that regulates heat-exchanger pump output hot water) of heater, make output insulation water in course of conveying, be heated to assigned temperature, can obtain the hot water higher than insulation water.The scheme of this non high temperature insulation, undoubtedly in the time can immediately obtaining high-temperature-hot-water, the effect (be incubated with in energy-conservation maintaining lower temperature in other words, can immediately obtain again the hot water of higher temperature) again with energy-conserving and environment-protective, has significant superiority.In addition, by this post bake function of heater, can also in the time of adjusting water outlet temperature, increase a regulated variable, thereby can be in the time obtaining the hot water of assigned temperature, preferential ensure a large amount of water outlets of water pump (water pump with maximum stream flow working condition under, by regulating the power of heater to regulate the temperature of hot water output), in the utility model, also further set forth in connection with temperature-controlled process.

In order to realize above-mentioned post bake function, concrete, described heater and described heat-exchanger pump assembly are installed toward the water-supply-pipe one of hot-and-cold water mixer water delivery, described heater can heat the water of hot water tank, and can in hot-and-cold water mixer course of conveying, carry out post bake to it by the water in water-supply-pipe to hot water.Further, described heater comprise an inner wall belt groove metal tube, be located at and be adjacent to described inner wall of metal tube in metal tube and the heat-generating pipe of concentric installation, the groove of described inner wall of metal tube forms the aqueduct to hot-and-cold water mixer water delivery, the bottom of described metal tube is connected with the delivery outlet of heat-exchanger pump by pipeline, and the top of described metal tube is connected with the hot water input port of hot-and-cold water mixer by pipeline.Like this, heating tube can carry out conventional heating (i.e. once heating) to the water in hot water tank by metal tube; And the water of hot water tank can be heated pipe post bake through heat-exchanger pump in the time that the aqueduct of above-mentioned groove formation is carried.

Further, the top of described metal tube is connected with a tube connector at the side of junction band opening, the opening of the corresponding described tube connector of tube wall on the top of described metal tube is provided with fluting, the fluting of described metal tube and the opening of described tube connector lead to the pipeline of the hot water input port of hot-and-cold water mixer, and the electric wire of described heat-generating pipe is drawn by the end of tube connector.

In order to realize above-mentioned post bake, the another kind of a kind of water dispenser technical scheme that can quantitative constant temperature water outlet of the utility model improves, described heater comprises conventional heating device and after-heater, described after-heater comprises a metal tube, be located in metal tube and the heat-generating pipe of the concentric installation of metal tube, between described heat-generating pipe and metal tube, there is annular flow channel, the bottom of described metal tube is connected with the delivery outlet of heat-exchanger pump by pipeline, and the top of described metal tube is connected with the hot water input port of hot-and-cold water mixer by pipeline.That is to say, conventional heating device (for once heating) and after-heater are separated, and after-heater for delivery process is carried out to post bake, has improved post bake efficiency separately greatly.

As the improvement of a kind of water dispenser technical scheme that can quantitative constant temperature water outlet of the utility model, described liquid level detection device is a liquid level sensor can multiple spot detecting, described liquid level sensor is the strip circuit board of establishing liquid level detection circuit in one, described liquid level detection circuit comprises a resistance circuit being made up of N resistor in series, and correspondence is provided with N transistor, one end of described resistance circuit is connected with ground terminal, and the other end is liquid level voltage output; Each described transistorized colelctor electrode is connected on the series connection node of each resistor of described resistance circuit; Each described transistorized emitter stage is connected with ground terminal; Each described transistorized base stage is connected with an exploring electrode respectively; The respectively corresponding test point of each described exploring electrode; Described liquid level detection circuit is also provided with a voltage grading resistor, and one end of described voltage grading resistor is connected on described liquid level voltage output, and the other end is connected with the first power supply terminal; Described the first power supply terminal is powered to described liquid level detection circuit; Described the first power supply terminal can be connected with described exploring electrode conduction by liquid; Described liquid level detection circuit adopts insulating materials to seal all circuit except described exploring electrode, described the first power supply terminal and described liquid level voltage output.The detection principle of above-mentioned liquid level sensor is: in the time that certain exploring electrode is immersed in liquid level below, due to the electric conductivity of liquid, described the first power supply terminal is connected with described exploring electrode conduction by this liquid, therefore, between the first power supply terminal and this exploring electrode, be equivalent to couple together by a resistor, thereby the transistor turns that this exploring electrode is connected, make this transistorized colelctor electrode be connected with emitter stage conducting, guide the corresponding series connection node of resistance circuit into earth terminal, and other is positioned to the resistor short circuit below liquid level, thereby change the resistance value of resistance circuit, and the dividing potential drop of the supply voltage that the variation of the resistance value of resistance circuit will cause the first power supply terminal output on this resistance circuit changes, therefore, utilize the resistance value, liquid level of resistance circuit to detect the incidence relation between output voltage values and the liquid level three of output, can calculate the height of liquid level by gathering the magnitude of voltage of liquid level voltage output of resistance circuit.Above-mentioned liquid level sensor in technical solutions of the utility model utilizes transistorized physical characteristic, in conjunction with the flexible design of resistance circuit, while making the position of liquid level in different exploring electrodes, liquid level voltage output is exported different magnitudes of voltage, thereby know current liquid level position according to its concrete output voltage values, flexible design, and liquid level detection circuit is simple in structure, be set to a circuit board, occupy space minimum, it is especially convenient to install, and also further facilitates the installation of the temperature sensor in normal-temperature water container and hot water tank in the utility model.And according to the needs of accuracy of detection, can design multiple exploring electrodes.

Further, on described circuit board, be also provided with the public electrode not sealed by described insulating materials; Described public electrode is connected with described the first power supply terminal by wire; Described public electrode can be connected with described exploring electrode conduction by liquid.Due to the exploring electrode P of liquid level detection circuit _nthat dependence liquid is that transmission medium is connected conducting with the first power supply terminal Vcc1, and each exploring electrode P _nbe uniformly distributed along circuit board 100 from top to bottom, therefore, liquid level detection circuit exists and detects range (as 200 millimeters), as exploring electrode P _ndistance the first power supply terminal Vcc1 may make time far away some transistor cannot conducting.Therefore, according to the actual needs, one or more public electrode T that are connected conducting with the first power supply terminal Vcc1 can be further set _x(x=1,2 ...), make the exploring electrode P in liquid level detection circuit _ncan pass through public electrode T _xbe connected with the first power supply terminal Vcc1, thus ensure each transistor Qn (n=1,2 ..., N) can normally work.According to the situation of the hot water tank of water dispenser and normal-temperature water container depth, can bottom and/or middle part on circuit board public electrode be set, certainly, according to application needs, the public electrode of greater number also can be set in other positions.

Concrete, described liquid level voltage output, described the first power supply terminal and described ground terminal are arranged on the top of described circuit board; The temperature sensor of described normal-temperature water container and the temperature sensor of hot water tank can be located at respectively the bottom of described circuit board.The liquid level sensor that the utility model is designed, for the temperature sensor of normal-temperature water container and hot water tank provides good installation site.

As the improvement of a kind of water dispenser technical scheme that can quantitative constant temperature water outlet of the utility model, the refrigerator of connecting on the pipeline of described normal temperature water pump and the input port of described hot-and-cold water mixer.

Further, described refrigerator is semiconductor cooler, described semiconductor cooler comprises semiconductor chilling plate, heat exchanger, radiator, and one of them interface of described heat exchanger connects the delivery outlet of normal temperature water pump, and another interface connects the input port of hot-and-cold water mixer.

As the improvement of a kind of water dispenser embodiment that can quantitative constant temperature water outlet of the utility model, described water dispenser has self-priming water pump or magnetic valve, the delivery outlet of described self-priming water pump or magnetic valve connects described normal-temperature water container by pipeline, and the input port of described self-priming water pump or magnetic valve connects external water source interface by pipeline.Further, the pipeline between the input port of self-priming water pump or magnetic valve and external water source interface is in series with filter.

As the another kind of mode that is the water filling of normal-temperature water container, the normal-temperature water container top of described water dispenser is provided with water filling port that can Manual water injection.

Further, described hot water tank adopts double-layer stainless steel container or glass inner bag vacuum flask.

For the ease of the use of the utility model water dispenser, whether water outlet can be provided with detection the switch of cup.On the operating space of controller, can be provided with and detect the approaching sensor of palm.

Further, as the improvement of a kind of water dispenser technical scheme that can quantitative constant temperature water outlet of the utility model, normal-temperature water container ring around and surround hot water tank.Adopt this structural design, can make water dispenser inner space utilize more abundant, compared to some existing water dispensers, it respectively uses a container as normal-temperature water container and hot water tank, and separate separating, and the utility model more compact structure is small and exquisite attractive in appearance.

Brief description of the drawings

In order to be illustrated more clearly in the technical scheme of the utility model embodiment, below the accompanying drawing to embodiment is briefly described.

Fig. 1 is the top view of a kind of water dispenser embodiment that can quantitative constant temperature water outlet of the utility model;

Fig. 2 is the cutaway view along B-B direction in Fig. 1; Fig. 3 is the cutaway view along C-C direction in Fig. 1;

Fig. 4 is the utility model embodiment middle gear pump structure figure;

Fig. 5 is the structural representation of heat-exchanger pump assembly 5 in the utility model embodiment; Fig. 6 is the plan structure schematic diagram of middle heat-exchanger pump assembly 5 embodiment illustrated in fig. 5; Fig. 7 is the cutaway view along J-J direction in Fig. 6;

Fig. 8 is the structural representation of 3 one kinds of embodiments of normal temperature water pump component in the utility model embodiment, and wherein normal temperature water pump is one-way pump, only for inputting normal-temperature water to hot-and-cold water mixer;

Fig. 9 is the plan structure schematic diagram of middle normal temperature water pump component 3 embodiment illustrated in fig. 8; Figure 10 is the cutaway view along K-K direction in Fig. 9;

Figure 11 is the structural representation of normal temperature water pump component 3 another kind of embodiments in the utility model embodiment, and wherein normal temperature water pump is two-way pump, for to hot-and-cold water mixer input normal-temperature water, is hot water tank water filling simultaneously;

Figure 12 is the perspective view of middle normal-temperature water gear pump head embodiment illustrated in fig. 11;

Figure 13 is the cutaway view of middle normal-temperature water gear pump head embodiment illustrated in fig. 12;

Figure 14 is the internal structure schematic diagram of a kind of embodiment of the utility model, and wherein normal temperature water pump component 3 adopts the two-way pump shown in Figure 11;

Figure 15 is the structural representation of a kind of embodiment of the utility model, has wherein hidden shell 1, and normal temperature water pump component 3 is one-way pump, is provided with from normal-temperature water container 2 and draws water to the transportation water pump assembly 8 of hot water tank 4 water fillings in water dispenser;

Figure 16 be embodiment illustrated in fig. 15 in the structure chart at another visual angle, wherein shown normal temperature water pump component 3 and transportation water pump assembly 8 simultaneously;

Figure 17 is internal structure schematic diagram embodiment illustrated in fig. 15, has wherein hidden the parts such as shell 1, inner cylinder support 14, hot water tank, bottle cap, and in figure, has shown normal temperature water pump component 3, transportation water pump assembly 8 and heat-exchanger pump assembly 5 simultaneously;

Figure 18 is the front view of refrigerator in the utility model embodiment; Figure 19 is the top view of middle refrigerator embodiment illustrated in fig. 18;

Figure 20 is the sectional structure chart of the heater that adopts of embodiment of the utility model, and wherein heater only includes a heating unit 44; Figure 21 is the partial enlarged drawing of region I in Figure 20; Figure 22 be embodiment illustrated in fig. 20 in vertical cross-sectional to heater; Figure 23 is the cutaway view along N-N direction in Figure 22;

The sectional structure chart of the heater that another embodiment of Figure 24 the utility model adopts, wherein heater comprises conventional heating pipe 440 and after-heater 45; Figure 25 be embodiment illustrated in fig. 24 in, the cross-sectional figure of after-heater 45;

Figure 26 is the structural representation of liquid level detection device in the utility model embodiment; Figure 27 is the side view of Figure 26;

Figure 28 is two kinds of circuit theory diagrams of liquid level detection device in the utility model embodiment, wherein, in Figure 28 (a), has N resistor, and in Figure 28 (b), removed N resistor in resistance circuit in resistance circuit, makes R _nget infinitely large quantity;

Figure 29 is the circuit theory diagrams that liquid level detection circuit changes with liquid level, wherein Figure 29 (a) has shown the circuit theory diagrams of liquid-immersed the first exploring electrode P1, and Figure 29 (b) has shown that liquid level decline makes the circuit theory diagrams of liquid-immersed the second exploring electrode P2;

Figure 30 is the structural representation of the utility model embodiment middle controller 9.

Description of reference numerals:

Shell 1 base 10 water outlet of drinking machine 101 cup sense switch 102 top panels 11

Ring surface 143 on 14 times ring surfaces 141 of semicircle annular cover plate 111 base plate 12 rubber base 13 inner cylinder supports

The external water source interface 173 of strip supporting plate 15 tank 16 self-priming water pump 17 input port 171 delivery outlet 172

Stereoplasm tube 174 filters 175

The temperature sensor 203 of the 202 circuit board bottoms, top of liquid level sensor 200 circuit board 201 circuit boards

Normal-temperature water container 2 temperature sensor 21 first liquid level detection device 22 leak-off pipe 23 breach 231 openings 24

Normal temperature water pump component 3 normal temperature water pump 30 normal-temperature water gear pump head 300 first valve 301 second valves 302

The first valve stopper 303 second valve stopper 304 support 305 first delivery port 306 second delivery ports 307

The delivery port 312 of the water inlet 311 normal temperature water pump component gear pump heads of power transmission shaft 31 normal temperature water pump component gear pump heads

Stand tube 32 big belt pulley 33 small belt pulley 34 encoder 35 optoelectronic switch 36 belt 37 motors 38

Normal-temperature water pump seat 39

Water inlet 411 second liquid level detection device 42 bottle stoppers 43 of hot water tank 4 temperature sensor 41 hot water tanks

Silica gel sheath 431 heating unit 44 heat-generating pipe 441 heat-generating pipe wires 4411

Metal tube 442 4421 interface 4422 groove 443 tube connector 444 openings 4441 of slotting

Conventional heating pipe 440 after-heater 45 second heat-generating pipe 451 second metal tube 452 annular flow channels 453

Heat-exchanger pump assembly 5 heat-exchanger pumps 50

Hot water gear pump head 500 driving gear 501 driven gear 502 water inlet 503 delivery ports 504

The delivery port 512 of the water inlet 511 heat-exchanger pump component gear pump heads of power transmission shaft 51 heat-exchanger pump component gear pump heads

Stand tube 52 big belt pulley 53 small belt pulley 54 encoder 55 optoelectronic switch 56 belt 57 motors 58

61 hot water input ports 62, hot-and-cold water mixer 6 normal-temperature water input port

Refrigerator 7 semiconductor chilling plates 71

Heat exchanger 72 heat exchanger input port 721 heat exchanger delivery outlet 722 heat exchanger output water pipes 723

Radiator 73 fans 74

Transportation water pump assembly 8 controller 9 displays 91 fly shuttle knob 92

Determine that button 93 cancels/return button 94 sensors 95

Detailed description of the invention

Further describe detailed description of the invention of the present utility model below in conjunction with accompanying drawing.

A kind of water dispenser embodiment that can quantitative constant temperature water outlet of the utility model, as shown in Figure 1, Figure 2, Figure 3 shows, comprises shell 1; Normal-temperature water container 2, for exporting the normal temperature water pump component 3 of normal-temperature water, is provided with the temperature sensor 21 for detection of normal-temperature water temperature in normal-temperature water container 2; There is the hot water tank 4 of heat insulation function, for exporting the heat-exchanger pump assembly 5 of hot water, in hot water tank 4, be provided with heater, for detection of hot water temperature's temperature sensor 41 with detect the liquid level detection device 42 (calling " the second liquid level detection device 42 " in the following text) of the hot water water yield; Give the transportation water pump assembly of hot water tank water filling; Be used for the hot-and-cold water mixer 6 of normal-temperature water and hot water mixing; Control the controller of water dispenser work.Use the utility model embodiment, according to needed temperature, control respectively normal temperature water pump component 3 and heat-exchanger pump assembly 5 and respectively input normal-temperature water and hot water with given pace (flow) toward hot-and-cold water mixer 6, and through mixing output, can obtain the water of required temperature, control respectively normal temperature water pump component 3 and heat-exchanger pump assembly 5 by a certain amount of normal-temperature water of each output of flow separately and hot water simultaneously, can quantitatively obtain temperature required water.Hot-and-cold water mixer 6 is interfaces of similar threeway in a structure, and two input ports comprise a normal-temperature water input port 61 and a hot water input port 62 parallel being close in the horizontal direction, then converge in a blind hole vertically downward, finally load onto delivery outlet.

Described hot water tank 4 has heat insulation function, specifically can adopt the glass inner bag vacuum flask of double-layer stainless steel container or hot-water bottle, the heat-insulating property of rustless steel container is poorer than glass inner bag, but the solid difficult fragmentation of rustless steel container, and glass inner bag vacuum flask can provide extraordinary heat-insulating property and with low cost, use glass inner bag vacuum flask also very obvious as cool-bag energy-saving effect.Through test, the water in qualified glass inner bag vacuum flask drops to 85 ° of needs 6 hours from 95 °, and heat insulation effect is very superior.Hot water tank 4 is increased to heat insulation function, make it have can meet hot water tank export when needed hot water (for mix with normal-temperature water or for directly going out hot water), and the effect of simultaneously energy-conserving and environment-protective.What need to further illustrate is, in existing water dispenser, mostly adopt double-layer stainless steel container to be incubated and not adopt glass inner bag vacuum flask, double-layer stainless steel container to go out hot water convenient, below container, set out the mouth of a river, and can realize by magnetic valve or other common check valves.If adopt glass inner bag vacuum flask, water outlet is a problem that needs overcome, glass inner bag vacuum flask is difficult at its bottom opening output hot water, if adopt self priming pump such as membrane pump goes out hot water at top, the cost of pump is higher on the one hand, noise is larger on the other hand, is not a good selection for water dispenser.The utility model has overcome the defect of prior art well, can in water dispenser, apply easily glass inner bag vacuum flask and carry out hot water thermal insulating.The utility model also provides and can reduce holding temperature, can at once export when needed again the non high temperature thermal-insulating scheme of high-temperature-hot-water simultaneously, and this will be further explained below.

In the present embodiment, as Fig. 2, shown in Fig. 3, shell 1 is a cylindrical structure, include inner cylinder support 14, shell 1 top has top panel 11, near bottom, there is a base plate 12, in the middle of base plate, there is a circular hole for laying the rubber base 13 of stationary heat water receptacle 4, inner cylinder support 14 bottoms have an inside ring surface 141 (calling " lower ring surface " in the following text), there is the equally distributed screw hole of a circle above for fixing with shell 1, the place contacting with shell 1 bottom at the wall of inner cylinder support 14 is with a circle sealing ring, one outside annular is arranged at the top of inner cylinder support, the external diameter of annular equals the diameter of shell 1 inwall, like this, shell 1 and inner cylinder support 14 have formed the normal-temperature water container 2 of a ring-shaped cylinder shape.By such structure, hot water tank 4 by normal-temperature water container 2 around and surround, also hot water container 4 is positioned at the roundlet internal cavity part of normal-temperature water container 2, the whole water dispenser compact conformation that seems is small and exquisite attractive in appearance.Certainly, normal-temperature water container also can be set to square cylinder by similar mode, can in normal-temperature water container, cavity be set equally, to place hot water tank, and make normal-temperature water container ring around and surround it, water dispenser also can be obtained compact conformation, bijou effect.More excellent mode is that normal-temperature water container 2 and the hot water tank 4 of water dispenser are assembled in concentric mode.Each part of the utility model water dispenser embodiment is with the form of assembly, and Modularly is assembled, and easy installation and removal is convenient to clean, and such as shell is taken out, can clean normal-temperature water container.

On the outside ring surface (calling " upper ring surface 143 " in the following text) at inner cylinder support 14 tops, be screwed a strip supporting plate 15, this supporting plate 15 is located near the top of shell 1, for fixing normal temperature water pump component 3 and heat-exchanger pump assembly 5.In normal-temperature water container 2, there is a leak-off pipe 23, leak-off pipe 23 preferably adopts stereoplasm tube, this root pipe arrives the top of normal-temperature water container 2 always through bottom, at the top band jagged 231 of leak-off pipe 23, in the time that water level reaches the top of normal-temperature water container 2, water can flow to leak-off pipe 23 earial drainages from this breach 231, leak-off pipe 23 also can be used as blast pipe, hot water tank 4 adds the passage that thermogenetic aqueous vapor can add water to it by normal-temperature water container 2 and turns back to normal-temperature water container 2, then discharge by this leak-off pipe 23, be conducive to the safe handling of water dispenser.

Further, normal temperature water pump component and heat-exchanger pump assembly adopt constant displacement pump, and so-called constant displacement pump refers to the constant pump of theoretical displacement often turning.The flow of constant displacement pump and the rotating speed of pump are proportional, and the number of turns that the water yield of output turns over pump is directly proportional, and utilizes this specific character of constant displacement pump, drive rotating speed and the revolution of the motor of pump just can obtain flow and the output water yield of specifying by control.Common constant displacement pump, comprises gear pump, membrane pump, plunger displacement pump, peristaltic pump etc.In some embodiment of the utility model, can adopt above-mentioned constant displacement pump, by controlling respectively the output flow of hot water and normal-temperature water, obtain the water of needed temperature.

The utility model embodiment heat-exchanger pump assembly and normal temperature water pump component preferably adopt gear pump, and gear pump is a kind of constant displacement pump, and its flow formula is Q=2 π zm ²bn × 10 ^-3η, n is gear pump rotating speed, η is the operating efficiency of gear pump, z is the number of teeth of the gear of gear pump, m is the modulus of gear, b is the transverse tooth thickness of gear, can see that the flow transfer speed of gear pump has strict corresponding relation from formula, uses gear pump can accurately control the speed of flow and the water yield of output.In the present embodiment, gear pump head is 1 by two moduluses, gear that the number of teeth is 10 composition, and transverse tooth thickness is 6mm, gear pump can provide about 2000 milliliters of flows per minute (taking the operating efficiency of gear pump as 90%) in the time of the rotating speed that 6000 turn.As shown in Figure 4, in the gear pump head 500 of gear pump, comprise an intermeshing driving gear 501 and a driven gear 502, the water of the water inlet 503 of gear pump head is exported from delivery port 504 with the rotation of the gear teeth of driving gear 501 and driven gear 502, the rotating speed of control gear can be controlled the flow velocity of output current, and the number of turns that control gear turns over can be controlled the water yield of output water.More constant speed quantitative output hot water more accurately, gear pump is also connected with coding disk.Gear pump is connected to encoder, is for following consideration: the rotating speed that encoder can detection of gear pump and the number of turns turning over are set, thus constant speed quantitative water delivery more accurately.In running, the umber of pulse that can constantly return to encoder feedback with certain hour interval is compared and works, the output controlled quentity controlled variable of adjustment that can be real-time and correction gear pump makes the flow of two pumps carry out work according to the ratio of specifying, and whether detection in real time arrives the predetermined water outlet water yield, guarantee constant speed quantitative, constant speed (the especially mixing of hot water and normal-temperature water, to the accurate control of flow separately, could further ensure water outlet temperature accurately) constant temperature (ensured water yield accurately) ensured accurately constant temperature quantitative-outlet to greatest extent.In addition, due to existing gear pump product, its flow rotating speed corresponding relation of indicating is often with a kind of perfect condition, although the gear pump product on market can be towards the precision effort of better flow rotating speed, but, be always difficult to avoid having error, encoder is set can overcomes the above-mentioned defect error of existing gear pump product, thereby further ensure the output flow of hot water and normal-temperature water, with output capacity.Certainly, in other embodiments, adopt non-gear pump such as membrane pump, plunger displacement pump, peristaltic pump etc., also can revise by encoder is set the rotating speed flow of water pump in water dispenser work engineering.

Concrete, the gear pump in hot water tank 4 is installed on hot water tank 4 inside by a stand tube 52 that stretches into hot water tank 2, is preferably bottom, and as shown in Fig. 5-7, Fig. 5 is the structural representation of heat-exchanger pump assembly 5 in the utility model embodiment; Fig. 6 is the plan structure schematic diagram of middle heat-exchanger pump assembly 5 embodiment illustrated in fig. 5; Fig. 7 is the cutaway view along J-J direction in Fig. 6.In the present embodiment, heat-exchanger pump assembly 5 comprises heat-exchanger pump 50 (adopting hot water gear pump head 500), power transmission shaft 51, stand tube 52, big belt pulley 53, small belt pulley 54, encoder 55, optoelectronic switch 56, belt 57, motor 58 and relevant joint and pipeline.The two ends of the stand tube 52 of being done by stainless steel tube are separately fixed at by the mode tightly entering on the bottle stopper 43 of gear pump head 500 and hot water tank 4, power transmission shaft 51 in pipe also correspondingly extends, can make the gear pump head 500 of heat-exchanger pump be deep into the bottom of hot water tank 4 and motor part can be placed on the outside of hot water tank by such extension system, solve and allowed motor be placed on to be heated in hot water tank the problem of cisco unity malfunction.Motor 58 and power transmission shaft 51 drive by the mode of belt pulley, make motor 58 can and power transmission shaft 51 be arranged on side abreast and thereby the space that is arranged in hot water tank 4 tops of glass refills makes compact conformation saving space, belt pulley (being big belt pulley 55) on belt pulley (being small belt pulley 54) and power transmission shaft on motor arranges for slowing down, the power of DC micromotor higher output of rotating speed under same volume is larger, if can affect the life-span greatly but gear pump is operated in too high rotating speed, so carry out deceleration energy and reduce the volume of motor in obtaining suitable flow by belt pulley.Certainly, power transmission shaft 51 also can be in transmission connection in hot water tank 4 outsides by other means with motor 58, such as gear drive, and except the mode of being in transmission connection, the mode that can also connect by shaft coupling, certain protection domain that also falls into this patent.On the small belt pulley 54 of motor 58, encoder 55 is installed, because the small belt pulley 54 of connection motor is less, the coding disk that is installed on so this encoder 55 also can be less, be convenient to water dispenser internal structure compactness, if and encoder 55 is installed on to the big belt pulley 53 of power transmission shaft, the coding disk of encoder 55 is also larger.On the side of encoder 55, optoelectronic switch 56 is housed, for detection of the rotating speed of motor 58 and the number of turns turning over, thereby accurately constant speed quantitative is exported hot water.The water inlet 511 of heat-exchanger pump assembly is in gear pump head 500 bottoms; delivery port 512 is on gear pump head 500 tops; water and the delivery port 512 that can be extracted into like this container bottom are convenient with follow-up electro-heat equipment connection in the above; certainly the water inlet 511 of heat-exchanger pump and the setting position of delivery port 512 should not hinder protection domain of the present utility model; other position modes of water inlet 511 and delivery port 512, will be understood that and also fall into protection domain of the present utility model.The water inlet 411 of hot water tank is located at bottle stopper 43, and bottle stopper 43 plays several effects: a, heat insulation as the sealing of hot water tank 4 here; B, stationary heat water receptacle 4; C, as heat-exchanger pump assembly 5 and below by the holder of the liquid level sensor of retouching and temperature sensor assembly, heater.The such as POM of the heat insulation nontoxic material of materials'use of bottle stopper, in order to allow the mouth of bottle stopper and hot water tank combine closely, adds a silica gel sheath 431.

The structure of the structure of normal temperature water pump component 3 and above-mentioned heat-exchanger pump assembly 5 is roughly the same, as shown in Fig. 8-10, Fig. 8 is the structural representation of 3 one kinds of embodiments of normal temperature water pump component in the utility model embodiment, Fig. 9 is the plan structure schematic diagram of middle normal temperature water pump component 3 embodiment illustrated in fig. 8, and Figure 10 is the cutaway view along K-K direction in Fig. 9.Normal temperature water pump component 3 comprises normal temperature water pump 30 (adopting normal-temperature water gear pump head 300), power transmission shaft 31, stand tube 32, big belt pulley 33, small belt pulley 34, encoder 35, optoelectronic switch 36, belt 37, motor 38 and relevant joint and pipeline.Two ends by stainless steel stent pipe 32 are separately fixed near the supporting plate 15 normal-temperature water gear pump head 300 and shell 1 top by the mode tightly entering, power transmission shaft 31 in pipe also correspondingly extends, can make the gear pump head 300 of normal temperature water pump stretch into the inside of normal-temperature water container by such extension system, be preferably bottom.The motor 38 of normal temperature water pump and power transmission shaft 31 are also to drive by the mode of belt pulley, belt pulley (being big belt pulley 35) on belt pulley (being small belt pulley 34) and power transmission shaft 31 on motor 38 arranges for slowing down, by bel-drivenn mode and make motor 38 installation parallel with power transmission shaft 31, also make the more compact saving of structure space, if the vertical installation of motor and power transmission shaft has increased height and the internal volume of water dispenser undoubtedly.Same, motor 38 and the power transmission shaft 31 of normal temperature water pump also can adopt other modes that are in transmission connection, such as gear drive, and except the mode of being in transmission connection, also can be by power transmission shaft and the mode of motor at normal-temperature water external container employing shaft coupling direct connection.On the small belt pulley 34 of the motor 38 of normal temperature water pump, encoder 35 is also installed, optoelectronic switch 36 is housed for detection of the rotating speed of motor 38 and the Lap Time turning on the side of encoder 35, thereby accurately constant speed quantitative is exported normal-temperature water.Reference numeral 39 represents normal-temperature water pump seat, for normal temperature water pump component 3 is fixed on to supporting plate 15.

The delivery port 312 of normal temperature water pump component is directly connected to the normal-temperature water input port 61 of hot-and-cold water mixer 6 by pipeline, at this moment, the water inlet 311 of normal temperature water pump component is below normal-temperature water gear pump head 300, delivery port 312 is on normal-temperature water gear pump head 300, and certain this position arranges and be nonessential.

In normal-temperature water container 2, also need to be provided with the transportation water pump assembly to hot water tank water filling.Comprise two kinds of implementations at the utility model embodiment, one is that normal temperature water pump component 3 is designed to two-way pump, makes it possess the dual-purpose function of a pump, in this case, in normal-temperature water container 2, just only a water pump need to be installed; Another kind of mode is a pump to be set separately for to hot water tank water filling.Certainly, also can be in the outer setting of normal-temperature water container 2 the transportation water pump assembly to hot water tank water filling, but, increased like this complexity of structure.

Introduce first kind of way below, as shown in Figure 11-13, Figure 11 is the structural representation of normal temperature water pump component 3 another kind of embodiments in the utility model embodiment, Figure 12 is the perspective view of middle normal-temperature water gear pump head embodiment illustrated in fig. 11, and Figure 13 is the cutaway view of middle normal-temperature water gear pump head embodiment illustrated in fig. 12; Now normal temperature water pump component 3 is designed to two-way pump, normal-temperature water gear pump head 300 one end comprise the first valve 301 and 302 two valves of the second valve, two valves comprise that respectively the first valve stopper 303 and 304, two valve stoppers of the second valve stopper connect by support 305.Corresponding, normal-temperature water gear pump head 300 other ends comprise the first delivery port 306 and the second delivery port 307, two delivery ports are corresponding with two valve displacements, as shown in figure 13, in the time of gear pump forward, gear driven current flow to the direction (flowing to the cavity of the second delivery port 307 from the cavity of the first delivery port 306) of the second valve 302 from the direction of the first valve 301, at this moment, under the effect of hydraulic pressure, the first valve stopper 303 is rushed to open, the second valve stopper 304 is pressed on the second valve 302 by hydraulic pressure, thereby form and enter water from the second delivery port 307 water outlets from the first valve 301, the situation that the second valve stopper 304 is closed simultaneously, vice versa, in the time that gear pump reverses, gear driven current flow to the direction (flowing to the cavity of the first delivery port 306 from the cavity of the second delivery port 307) of the first valve 301 from the direction of the second valve 302, at this moment, under the effect of hydraulic pressure, the second valve stopper 304 is rushed to open, and the first valve stopper 303 is pressed on the first valve 301 by hydraulic pressure, enter water from the first delivery port 306 water outlets thereby form from the second valve 302, the situation that the first valve stopper 303 is closed simultaneously.In the utility model embodiment, can select any delivery port to connect the normal-temperature water input port 61 of hot-and-cold water mixer 6; Another leads to the water inlet 411 of hot water tank 4.By a normal temperature water pump component 3 is designed to two-way pump, both for inputting normal-temperature water to hot-and-cold water mixer 6, also, for to hot water tank 2 water fillings, greatly simplify the structure, reduce cost.

Introduce the second way below, as shown in Figure 15-17, water dispenser is provided with in addition one and from normal-temperature water container 2, draws water to the transportation water pump assembly 8 of hot water tank 4 water fillings, the water pump that transportation water pump assembly 8 adopts can be arranged in normal-temperature water container 2 and be arranged on outside normal-temperature water container 2, if what be arranged on normal-temperature water container 2 inside just selects miniature immersible pump, can select common centrifugal pump to be arranged on below container or select pump (for example gear pump with self-suction function at external container, membrane pump, peristaltic pump etc.) be mounted freely on suitable position.The preferred scheme of the present embodiment is to use miniature immersible pump to be arranged near the bottom in normal-temperature water container, and the water inlet of water pump approaches the bottom of normal-temperature water container, uses miniature immersible pump to be arranged on internal tank can to save space and make the compact conformation of machine.Reference numeral 81 has shown transportation water pump assembly 8 water pipes to hot water tank water filling.

Above-mentioned is the implementation toward hot water tank 4 water fillings by normal-temperature water container 2; two kinds of embodiment are introduced; certainly; also can adopt the mode from outside toward hot water tank 4 water fillings; only increase volume; increase the complexity of structure and increased cost, also should fall into the protection domain of this patent by a kind of like this mode of modification.

Input water from outside to normal-temperature water container 2 and also can realize by two kinds of modes, one is manually to add water, and one is automatic watering.

Introduce the setting that manually adds water below, as Figure 2-3, the top (going up ring surface 143) of normal-temperature water container 2 is with the opening 24 of a circle, also there is the opening of a circle the corresponding position of top panel 11 of water dispenser, between two openings, connect by a cylindrical tank 16, tank 16 is with the effect of similar funnel, thereby the water filling port of increase normal-temperature water container 2 adds water to facilitate manually.On top panel 11 near one side of something of water filling port with an energy semicircle annular cover plate 111 taking diameter as axle center folding, reach and prevent that foreign matter from entering normal-temperature water container and effect attractive in appearance, one side of cover plate is fixed on top panel 11 by hinge.

Introduce the setting of automatic watering below.In order to allow the drinking-water function automatic filled with water in water source from the outside, can self-priming water pump or magnetic valve be set according to the type at external water source, in the time that external water source is the container of a dress water, self-priming water pump (having the water pump of self-suction function) for example membrane pump or gear pump can be set, peristaltic pump etc., in the time that being purified water machine, external water source just can be set to magnetic valve, to use self-priming water pump as embodiment, as Fig. 2, shown in Fig. 3, the bottom of water dispenser with one with the fixing self-priming water pump 17 of rubber base, the input port 171 of self-priming water pump 17 is connected to the external water source interface 173 being fixed on shell by silicone tube, the delivery outlet 172 of self-priming water pump 17 is connected on a stereoplasm tube 174 by silicone tube, this root stereoplasm tube 174 arrives the top of water at low temperature container 2 through the bottom of water at low temperature container 2, jagged near the marginal belt of container top at pipeline, water can flow in normal-temperature water container 2 from this breach.Further, between the input port 171 of self-priming water pump 17 and external water source interface 173, be provided with a filter 175 and enter water dispenser and part of damage to have prevented foreign matter, and ensure water cleaning.Above-mentioned two kinds of modes that usual warm water container 2 adds water, can get one, but also both are combined with.

In this water dispenser embodiment, in order to obtain the water lower than normal temperature, as shown in Figure 14,16, the refrigerator 7 of can connecting on the pipeline that connects the delivery port 312 of normal temperature water pump component and the normal-temperature water input port 61 of hot-and-cold water mixer 6, refrigerator 7 is preferably semiconductor cooler, because this refrigerator has, volume is little, the large feature of the refrigeration temperature difference, is applicable to very much the related small-sized water dispenser of the utility model.As shown in Figure 18-19, the front view that Figure 18 is refrigerator, the top view that Figure 19 is refrigerator, refrigerator is mainly made up of semiconductor chilling plate 71, heat exchanger 72, radiator 73, also comprises fan 74.This refrigerator is installed on the bottom of water dispenser.Taking Figure 16 as example, in the time that refrigerator is set, the water inlet 311 of normal temperature water pump component 3 and delivery port 312 are all arranged on bottom (certainly, the water inlet 311 of normal-temperature water assembly 3 and the setting position of delivery port 312 should not affect protection domain of the present utility model, as Figure 14, two delivery ports 306 of two-way pump, 307 are arranged on top), the base plate that delivery port 312 passes normal-temperature water container 2 by interface is connected to the input port 721 of the heat exchanger 72 of refrigerator 7, delivery port 312 need to use silica gel sheath sealing during through the base plate of normal-temperature water container 2, and be connected to the input port of heat exchanger 72 by silicone tube.The delivery outlet 722 of heat exchanger 72 is connected to the normal-temperature water input port 61 of hot-and-cold water mixer 6 by silicone tube (being the heat exchanger output water pipe 723 in Figure 14 and Figure 16).Semiconductor chilling plate 71 adopts direct current supply, and the drive circuit of the MOSFET element composition of the pwm signal control of origin self-controller is realized the adjusting of refrigeration work consumption.As can be seen here, the utility model embodiment, both can be mixed to get constant temperature hot water by the water of normal-temperature water container and hot water tank output, also can from normal-temperature water container, export cold water by refrigerator, only need two containers, do not need to arrange cold water vessels, normal-temperature water container and three containers of hot water tank, simplified internal structure, make more exquisiteness and miniaturization of water dispenser.And, be similar to above-mentioned non high temperature thermal-insulating scheme, in the time that user need to export the cold water lower than the water temperature of normal-temperature water container, regulate the power of refrigerator (preferentially to select normal temperature water pump with maximum stream flow work, regulate if desired the flow of normal temperature water pump output normal-temperature water), make to export normal-temperature water cooled to assigned temperature after refrigerator, can obtain the cold water lower than normal temperature.By this refrigerating function of refrigerator, be similar to the post bake function of heater, also in the time of adjusting water outlet temperature, increase a regulated variable, this also will further set forth in conjunction with temperature-controlled process hereinafter.

Next will introduce the heater of the utility model embodiment, the heater in hot water tank 4 can be transported in the process of hot-and-cold water mixer 6 its post bake at hot water.In the utility model embodiment, the water in hot water tank is defined as to once heating by heater heating before heat-exchanger pump is carried, and water in hot water tank is again heated and is defined as post bake in the course of conveying through heat-exchanger pump conveying by heater.That is to say, heater in hot water tank 4 provides two kinds of functions, one is that water in heat hot water container is to assigned temperature and make it constant near this temperature, be exactly that the insulation water that again adds thermal output is incubated to obtain in container the hot water that coolant-temperature gage is high in addition, for identical cool-bag, if the temperature of the water in container is higher constant water just more at the spent electric energy of this temperature, although if can reduce energy consumption but the meeting scope of application of minimizing water dispenser greatly constant the water in hot water tank a lower temperature, when just said two problems above the extraordinary solution of energy of the words that use heating element again to heat the water of output, not only can allow water dispenser output approach the boiling water of 100 degree but also can allow water in hot water tank is constant to be saved energy consumption at one compared with low temperature and reach energy-conservation object.This is non high temperature thermal-insulating scheme as above, does not need the water in hot water tank 4 to maintain very high temperature under normality, also can at once export the hot water of high enough temp, has very superior energy-saving effect.In addition, by heater that can post bake in the interior setting of hot water tank 4, in the process of water fountain effluent temperature that obtains appointment, increased a regulated variable, thereby can be in the time obtaining the hot water of assigned temperature, preferentially ensure a large amount of water outlets of water pump (water pump with maximum stream flow working condition under, by regulating the power of heater to regulate the temperature of hot water output), ensure that water yield is enough large, avoided user's water intaking time long, need to wait as long for.In the time introducing the control method of this water dispenser, also will further introduce above-mentioned effect of the present utility model.

Heater can be in the following way:

First kind of way, as shown in Fig. 3 and Figure 20 to Figure 23, heater only includes a heating unit 44, heater and heat-exchanger pump assembly 5 are installed toward the water-supply-pipe one of hot-and-cold water mixer water delivery, this heater both can heat the water of hot water tank 4, and can to hot water in water-supply-pipe it being carried out to post bake in hot-and-cold water mixer course of conveying.Concrete, as shown in Figure 20-23, Figure 20 is the sectional structure chart of the heater that adopts of embodiment of the utility model, Figure 21 is the partial enlarged drawing of region I in Figure 20, Figure 22 be embodiment illustrated in fig. 20 in vertical cross-sectional to heater, Figure 23 is the cutaway view along N-N direction in Figure 22.Heating unit 44 comprises the joint at heat-generating pipe 441, metal tube 442 and two ends, metal tube 442 is preferably aluminum alloy materials, the inner wall belt fluted 443 of metal tube 442, heat-generating pipe 441 and the concentric installation of metal tube 442, the external diameter of the diameter of the inwall of metal tube 442 and heat-generating pipe 441 equates, and together with metal tube 442 inwalls fit tightly with the outer wall of heat-generating pipe 441.Like this, the groove of metal tube 442 inwalls forms the aqueduct to hot-and-cold water mixer 6 delivering hot waters, because heat-generating pipe 441 and the inwall of metal tube 442 are adjacent to, like this heat of heat-generating pipe 441 can the water of 2 li of hot water tanks be heated by metal tube 442 and water from the groove 443 of metal tube 442 by time can again be heated.The bottom of metal tube 442 has an interface 4422 to realize the input of water (being connected with the delivery outlet of heat-exchanger pump), and the top of metal tube 442 is connected with the hot water input port of hot-and-cold water mixer 6 by pipeline.Preferably, there is the tube connector 444 of a side band opening on the top of metal tube 442, metal tube 442 is inserted into tube connector 444 inner bore of pipeline by the mode tightly entering is fixed together with tube connector 444, the external cylindrical surface of tube connector 444 is threaded, and by this screw thread, heat-generating pipe 441 and metal tube 442 entirety is fixed on bottle stopper 43.The side of the junction of tube connector 444 and metal tube 442 is with opening 4441, the tube wall on the top of metal tube 442 also corresponding described opening 4441 is provided with fluting 4421, and the fluting 4421 of above-mentioned metal tube 442 passes through the water channel of bottle stopper towards the hot water input port 62 of hot-and-cold water mixer 6 with the delivery port that the opening 4441 of tube connector 444 forms hot water aqueduct.The wire 4411 of heat-generating pipe 441 is drawn by the end of tube connector 444.The delivery port of metal tube 442 is arranged on to the sidewall of metal tube, effectively the heat-generating pipe wire 4411 that is positioned at metal tube 442 tops is kept apart, avoid occurring potential safety hazard.Use above-mentioned heater, can be the temperature constant of the water in hot water tank at 85 degree according to general service condition, suppose that it is 10 degree that the water of output is heated to the 95 degree temperature difference, the flow set of supposing water outlet be 600 milliliters per minute, heating power by calculating needs at this time at 420 watts (according to the formula Q=cm Δ T of specific heat capacity, specific heat of water holds for 4.2J/ (g DEG C), 600 ml waters are heated to 95 degrees Celsius by 85 degrees Celsius, needing the heat absorbing is Q=4.2*600*10J, heating power is P=Q/t=4.2*600*10/60=420 watt so), according to the groove shapes structure difference of metal tube 442, the efficiency of heating surface of the water of heating element to output is also corresponding different, because the tube wall of metal tube 442 can pass the heat of heat-generating pipe 441 (by the metal part between adjacent notches 443) for the water heating to hot water tank, therefore, when the water stream channel that hot water forms from groove 443 is exported, the heating power of heat-generating pipe 441 not carries out post bake for the water in groove 443 completely, when in the present embodiment, hot water flows through in groove 443, heat-generating pipe 441 is for being 60% left and right to the efficiency of hot water post bake, so, at this time in groove, the heating power of hot water needs 420 watts, the power of heat-generating pipe needs 700 watts, complete machine peak power can be controlled in 800 watts like this, such power can not form pressure to power distribution circuit.As can be seen here, by the way, the water of hot water tank 4 the insides only need to be incubated in less level at ordinary times, when needed, by heat-generating pipe 441, the water therefrom flowing through is carried out to post bake, can reach needed hot water temperature, obtain good energy-saving effect, and environmental protection.

The second way, heater comprises conventional heating device and two heating units of after-heater, conventional heating device can adopt conventional heating tube, such as common straight type electrothermal tube, U-shaped electrothermal tube, L-type electrothermal tube or other existing heaters, as Figure 24,25, the sectional structure chart of the heater that another embodiment of Figure 24 the utility model adopts, wherein heater comprises conventional heating pipe 440 and after-heater 45, Figure 25 be embodiment illustrated in fig. 24 in, the cross-sectional figure of after-heater 45; Wherein Reference numeral 440 represents conventional heating pipe.After-heater adopts the distinctive structure of the utility model, it comprises the second metal tube 452, be located in the second metal tube 452 the second heat-generating pipe 451 with the concentric installation of the second metal tube 452, the inwall of the outer wall of the second heat-generating pipe 451 and the second metal tube 452 keeps at a certain distance away thereby forms annular flow channel 453, the bottom of the second metal tube 452 is connected with the delivery outlet of heat-exchanger pump by pipeline, the structure on the top of the second metal tube 452 is identical with the embodiment of Figure 20 to 23, the fluting arranging via the second metal tube 452 sidewalls and the opening of tube connector side, be connected with the hot water input port 62 of hot and cold water hot-and-cold water mixer 6 by pipeline, the wire of the second heat-generating pipe 451 is also to be drawn by the end of tube connector.Adopt which, the second heat-generating pipe 451 can carry out post bake to the hot water passing through from annular flow channel 453 with very high efficiency.In first kind of way, the heat of heat-generating pipe 441 is owing to spreading from metal tube 442 to hot water tank, therefore, only has part efficiency for the hot water flowing through from groove 443 is carried out to post bake, and employing this programme, the second heat-generating pipe 451 can be to approach 100% efficiency for the hot water flowing through is carried out to post bake, and the efficiency of heating surface is high.Use above-mentioned heater, can be the temperature constant of the water in hot water tank at 85 degree according to general service condition, suppose that it is 10 degree that the water of output is heated to the 95 degree temperature difference, the flow set of supposing water outlet be 600 milliliters per minute, heating power by calculating needs is at this time at 420 watts, now, the heating power of secondary heat-generating pipe 451 is set as to 420 watts, can be all for heating the water of carrying at annular flow channel 453.Be located at conventional heating device in hot water tank 4 for the water in hot water tank is heated to assigned temperature, and constant in uniform temperature.Certainly, in this second way, be out of shape as one, after-heater also still can adopt the heating unit 44 of first kind of way, just the efficiency of heating surface of post bake is low, but adopt heating unit 44 while using in conjunction with conventional heating pipe 440, the water efficiency of heating surface in hot water tank is wanted to high.

In embodiment of the present utility model, in hot water tank, be provided with liquid level detection device, the water pump that the second liquid level detection device 42 in hot water tank adds water to hot water tank with control for detection of the height of hot water water level.As a kind of more excellent embodiment, normal-temperature water container also can be provided with liquid level detection device, be called the first liquid level detection device 22 below, the first liquid level detection device 22 in normal-temperature water container is for realizing the demonstration of warm water capacity and realizing automatic watering function, certainly, due to the water yield in normal-temperature water container can be real-time view and normal-temperature water container also has discharge orifice, therefore, liquid level detection device is set just as a more excellent scheme in normal-temperature water container, instead of necessary scheme.In the technical solution of the utility model, can adopt the modes such as existing ball float method, heavy cylinder method, water-level gauge method to realize, but preferred scheme is to adopt liquid level sensor, and the liquid level sensor of creating by the utility model detect for liquid level.As shown in Figure 26,27, Figure 26 is the structural representation of liquid level detection device in the utility model embodiment, and Figure 27 is the side view of Figure 26.Liquid level sensor 200 is a resistor-type liquid level sensor can multiple spot detecting, be specially the strip circuit board 201 of establishing liquid level detection circuit in one, described liquid level detection circuit in described liquid level detecting sensor comprises a resistance circuit being made up of N resistor in series, one end of described resistance circuit is connected with ground terminal, and the other end is liquid level voltage output; Wherein N is positive integer; Described liquid level detection circuit also correspondence is provided with N transistor, and each described transistorized colelctor electrode is connected on the series connection node of each resistor of described resistance circuit; Each described transistorized emitter stage is connected with ground terminal; Each described transistorized base stage is connected with an exploring electrode respectively; The respectively corresponding test point of each exploring electrode.Described liquid level detection circuit is also provided with a voltage grading resistor, and one end of described voltage grading resistor is connected on described liquid level voltage output, and the other end is connected with the first power supply terminal; Described the first power supply terminal is powered to described liquid level detection circuit.Described the first power supply terminal can be connected with described exploring electrode conduction by liquid.

Further, the resistance value relation in direct ratio in output voltage and the resistance circuit of described liquid level voltage output Level, the resistance R of the resistor of m series connection node of described resistance circuit _mresistance R with voltage grading resistor ₀there is incidence relation:

$\frac{\underset{n=1}{\overset{m}{\mathrm{\Σ}}}{R}_n}{R_0+\underset{n=1}{\overset{m}{\mathrm{\Σ}}}{R}_n}=\frac{m}{N}---\left(1\right)$

Wherein, m is positive integer, and 1≤m≤N-1, for the resistance value summation of top-down the first resistor to the m resistor of described liquid level detection circuit.And, in the time of m=N, the resistance value R of N resistor _nbe a self-defined resistance value R _r, or, described N resistor removed in described resistance circuit, make R _nfor infinitely large quantity.As Figure 28, Figure 28 is the circuit theory diagrams of liquid level detection device in the utility model embodiment, in Figure 28 (a), and the resistance value R of N resistor _nbe made as a self-defined resistance value R _r; In Figure 28 (b), N resistor removed in resistance circuit, to make R _nfor infinitely large quantity.As shown in Figure 28 (b), after N resistor removed in described resistance circuit, the transistorized colelctor electrode of N is connected on one end of N-1 resistor, and the other end of N-1 resistor is connected with the transistorized colelctor electrode of N-1, like this, and R _njust as being infinitely large quantity.

Particularly, each resistor from top to down in resistance circuit is arranged, and parameter m is also for being positioned at current liquid level below and nearest exploring electrode P _mwith the connected node label of resistance circuit, R _nbe n the resistor (not comprising voltage grading resistor R0) in resistance circuit, parameter N is also series connection node sum.The design of formula (1) can make to be positioned at different exploring electrode P when liquid level _mtime, the output voltage values of liquid level voltage output end Level be the first power supply terminal Vcc1 supply voltage m/N doubly.For example,, when liquid level did not just have the second exploring electrode P ₂time, the output voltage values of liquid level voltage output end Level is (2/N) * Vcc1.

Particularly, the resistance value of m resistor in described resistance circuit is:

$R_m=\frac{{\mathrm{NR}}_0}{(N-m+1)(N-m)},m=\mathrm{1,2},...,N-1---\left(2\right)$

Wherein, m is positive integer, and 1≤m≤N, and N is the quantity of the resistor in described resistance circuit; And, in the time of m=N, the resistance value R of described N resistor _nbe a self-defined resistance value R _r, or, described N resistor removed to realize resistance value R in described resistance circuit _nfor infinitely large quantity, can be referring to Figure 28 (b).

In the present embodiment, due to described constant resistance value R _rthe larger sensitivity to the lowermost test point level detection of circuit board of value higher, therefore, on the one hand, can be by the self-defined resistance value R that arranges _r, make resistance value R _renough large (constant resistance value R of value _rvalue be the bigger the better), particularly, preferably adopt the resistance value R of 10 times of above N-1 resistors _n-1, i.e. R _r>=10R _n-1; On the other hand, can, by simplifying the structure composition of resistance circuit, remove N resistor, only be connected the resistance value R in whole liquid level detection circuit thereby realized N series connection node in resistance circuit with the transistorized colelctor electrode of N _nbe equivalent to infinitely large quantity (+∞), now, liquid level detection circuit can obtain good liquid level and detect effect.

Further illustrate below in conjunction with illustrating, as shown in Figure 28 (a), in the time of parameter N=6,, described resistance circuit is made up of six resistor in series, and described multiple spot liquid level detection circuit is corresponding six exploring electrodes that are provided with six transistors and connect one to one with described transistor base also.Particularly, this resistance circuit is by the first resistor R1, the second resistor R2, the 3rd resistor R3, the 4th resistor R4, the 5th resistor R5 and the 6th resistor R _n(N=6) be in series successively; The base stage of the first transistor Q1 is connected with the first exploring electrode P1, and its colelctor electrode is connected with the liquid level voltage output Level of resistance circuit, and its emitter stage is connected with ground terminal GND; The base stage of transistor seconds Q2 is connected with the second exploring electrode P2, and its colelctor electrode is connected on the series connection node of the first resistor R1 and the second resistor R2, and its emitter stage is connected with ground terminal GND; The 3rd transistor Q3 to the six transistor P _n(N=6) connected mode is identical with the connected mode of transistor seconds Q2.Liquid level detection circuit is also provided with a voltage grading resistor R0, and it is upper that one end of this voltage grading resistor R0 is connected to described liquid level voltage output Level, and the other end is connected with the first power supply terminal Vcc1.

Especially, owing to coming N resistor R according to the formula (a) in formula (2) _m, i.e. R _n, while carrying out assignment, its denominator value (N-m+1) will be (N-m) null value, the calculated value of formula (a) will be infinitely large quantity (+∞), now R _nto be infinitely large quantity, can realize R by unsettled the connected node disconnection between N-1 resistor and N resistor _nfor infinitely large quantity, as Figure 28 (b).For convenience of the application of liquid level detection circuit, can be to R _ncarry out assignment, get a constant resistance value R _r, make R _r=R _n, as Figure 28 (a).

For example, when N value is 6, and by voltage grading resistor R ₀be preset as 10K Ω (kilohm) time, the resistance value that can calculate the first resistor R1 according to formula (2) is R1=2K Ω, the resistance value of the second resistor R2 is R2=3K Ω, the resistance value of the 3rd resistor R3 is R3=5K Ω, the resistance value of the 4th resistor R4 is R4=10K Ω, the resistance value of the 5th resistor R5 is R5=30K Ω, and the resistance value of the 6th resistor R6 is R6=R _r=10M Ω (1M Ω=10 ³k Ω).By above design value, can make liquid level be positioned at corresponding exploring electrode Pm (1≤m≤N) to locate time, the output voltage values of liquid level voltage output Level is respectively and approximates 0,1/6Vcc1,2/6Vcc1,3/6Vcc1,4/6Vcc1,5/6Vcc1, when liquid level is during lower than the sensing point (the 6th exploring electrode P6) of below, the output voltage of liquid level voltage output Level approximates Vcc1.

Because each exploring electrode is immersed in the liquid of liquid level to be measured conventionally, if exploring electrode is accepted the long-time power supply of the first power supply terminal, can cause the electrolysis of exploring electrode generating electrodes, to liquid release metal ions, change liquid constituent, and affect the service life of exploring electrode.Therefore, preferred, the first power supply terminal is carried out the timing power supply to level detection circuit, particularly, and the only just power supply of short time (as several milliseconds) in the time at every turn carrying out liquid level detection.

Further, described liquid level detection circuit adopts insulating materials to seal all circuit except described exploring electrode, described the first power supply terminal and described liquid level voltage output.Due to during liquid level detecting sensor need to be immersed in, if do not take insulation measures will make liquid level detecting sensor circuit for generating fault and cisco unity malfunction.Preferably, can use silica gel water to carry out entirety to liquid level detecting sensor and smear, to form one deck insulating coating layer.

Preferably, described exploring electrode is the probe being made up of anti-corrosion electric conducting material, or, be the conducting terminal of surface gold-plating.When described exploring electrode is when being made up of anti-corrosion electric conducting material, described anti-corrosion electric conducting material preferably adopts titanium and graphite, can effectively prevent the electrolysis that energising causes, and extends the service life of exploring electrode.

Preferably, exploring electrode P described in each _nbe evenly distributed on from top to bottom on described circuit board; Distance between each adjacent exploring electrode equates.Particularly, exploring electrode P _nquantity N can arrange according to actual needs.

Described liquid level voltage output Level, described the first power supply terminal Vcc1 and described ground terminal GND are arranged on the top 202 of described circuit board (above-mentioned three terminals all do not draw in Figure 27).

Further, the bottom on described circuit board and/or middle part are also provided with a public electrode not sealed by described insulating materials; Described public electrode is connected with described the first power supply terminal Vcc1 by wire; Described public electrode can be by liquid and described exploring electrode P _n(n=1,2 ..., N) and conduction connection.

When concrete enforcement, due to the exploring electrode P of liquid level detection circuit _nthat dependence liquid is that transmission medium is connected conducting with the first power supply terminal Vcc1, and each exploring electrode P _nbe uniformly distributed along circuit board 200 from top to bottom, therefore, liquid level detection circuit exists and detects range (as 200 millimeters), as exploring electrode P _ndistance the first power supply terminal Vcc1 may make time far away some transistor cannot conducting.Therefore, the utility model further arranges one or more public electrode T that are connected conducting with the first power supply terminal Vcc1 _x(x=1,2 ...), make the exploring electrode P in liquid level detection circuit _ncan pass through public electrode T _xbe connected with the first power supply terminal Vcc1, thus ensure each transistor Qn (n=1,2 ..., N) can normally work.According to the situation of the hot water tank of water dispenser and normal-temperature water container depth, in the time of N=6, owing to can each electronic devices and components of liquid level detection circuit being carried out to compact layout on narrow strip circuit board time, therefore can a public electrode be respectively set in the bottom of circuit board 201 and middle part.Particularly, as shown in figure 26, can be that circuit board 201 bottoms arrange the first public electrode T1 in liquid level detection circuit bottom, be that circuit board 201 middle parts arrange the second public electrode T2 at liquid level detection circuit middle part.Public electrode T _xquantity x should be according to the size of the detection range of liquid level detecting sensor and corresponding change.

In the liquid level detecting sensor providing at the present embodiment, the basic functional principle of its liquid level detection circuit is: in the time that certain exploring electrode is immersed in liquid level below, due to the electric conductivity of liquid, described the first power supply terminal is connected with described exploring electrode conduction by this liquid, therefore, between the first power supply terminal and this exploring electrode, be equivalent to couple together by a resistor, thereby the transistor turns that this exploring electrode is connected, make this transistorized colelctor electrode be connected with emitter stage conducting, guide the corresponding series connection node of resistance circuit into earth terminal, and other is positioned to the resistor short circuit below liquid level, thereby change the resistance value of resistance circuit, and the dividing potential drop of the supply voltage that the variation of the resistance value of resistance circuit will cause the first power supply terminal output on this resistance circuit changes, therefore, utilize the resistance value, liquid level of resistance circuit to detect the incidence relation between output voltage values and the liquid level three of output, can calculate the height of liquid level by gathering the magnitude of voltage of liquid level voltage output of resistance circuit.

Referring to Figure 29, that the liquid level detection circuit of liquid level sensor is with the circuit theory diagrams of liquid level variation, wherein Figure 29 (a) has shown the circuit theory diagrams of liquid-immersed the first exploring electrode P1, and Figure 29 (b) has shown that liquid level decline makes the circuit theory diagrams of liquid-immersed the second exploring electrode P2.

Particularly, as shown in Figure 29 (a), in the time of liquid-immersed the first exploring electrode P1 (due to exploring electrode Pn arranged distribution from top to bottom, therefore other exploring electrode is also positioned at liquid level below), each exploring electrode is all connected with public electrode T1 or T2 by liquid, when the first power supply terminal Vcc1 powers to public electrode, can make all crystals pipe Qn conducting in level detection circuit, but, after the first transistor Q1 conducting, be equivalent to its colelctor electrode and be connected rear ground connection with emitter stage, thereby by the first resistor R1～the N resistor R _nshort circuit, therefore the voltage difference between liquid level voltage output Level and the first exploring electrode P1 is zero; As shown in Figure 29 (b), in the time of liquid-immersed the second exploring electrode P2, the second exploring electrode P2～the N exploring electrode P _nwith the first power supply terminal Vcc1 conducting, make transistor seconds Q2～the N transistor Q _nconducting, still, after transistor seconds Q2 conducting, is equivalent to its colelctor electrode and is connected rear ground connection with emitter stage, thereby by the second resistor R2～the N resistor R _nshort circuit, therefore the voltage difference between liquid level voltage output Level and the second exploring electrode P2 is the magnitude of voltage at the first resistor R1 two ends; So analogize.

When concrete enforcement, corresponding relation while needing design to make the output voltage of each exploring electrode and liquid level be positioned at the position of this exploring electrode, thereby the position that can calculate according to the output voltage of the Level end detecting exploring electrode, obtains liquid level current location.

Above-mentioned liquid level detecting sensor, utilize transistorized physical characteristic, in conjunction with the flexible design of resistance circuit, can make the position of liquid level in different exploring electrodes time, liquid level voltage output is exported different magnitudes of voltage, thereby can know current liquid level position according to its concrete output voltage values.This Technical Design is flexible, can design as required multiple exploring electrodes, to improve accuracy in detection, it has been realized the liquid level of multiple test points has been detected by design cleverly, and cost is very low, and liquid level detection circuit is simple in structure, can make circuit board take up room by compact layout little, it is especially convenient to install, further facilitate the installation of the temperature sensor in the utility model normal-temperature water container and hot water tank, be highly suitable for the especially application of the utility model water dispenser embodiment of small household appliances.Can adopt width for the normal-temperature water container of the utility model embodiment and the liquid level sensor 200 of hot water tank is that 5 millimeters, length are that 200 millimeters, thickness are the double face copper of 1 millimeter, can certainly adopt other sizes.

Further, circuit board bottom at liquid level sensor 200 is also provided with the temperature sensor 203 for detection of fluid temperature, it is the bottom that temperature sensor 21 of normal-temperature water container and the temperature sensor 41 of hot water tank are installed on inner separately liquid level sensor, accordingly, on circuit board 201, also comprise the fluid temperature output Temp of the monitored data that receives and export described temperature sensor 203; And, for the second power supply terminal Vcc2 that described temperature sensor 203 is powered.Wherein, fluid temperature output Temp and the second power supply terminal Vcc2 do not draw in the drawings.

Because temperature sensor 203 is for the temperature (detecting in real time the temperature of normal-temperature water container and hot water tank) of real-time tracer liquid, therefore, can be by adding the second power supply terminal Vcc2 for a long time it being powered, thereby the first power supply terminal Vcc1 for liquid level detection circuit is powered and the second power supply terminal Vcc2 are made a distinction, avoid for a long time liquid level detection circuit being powered to make exploring electrode generation electrolysis.

When concrete enforcement, temperature sensor 203 can adopt the sensor of digital form or analog form.Wherein.The temperature sensor of analog form comprises thermistor, RTD, semiconductor temperature sensor, adopts analog-to-digital mode to transmit temperature data by corresponding signal conditioning circuit; The temperature sensor of digital form is the digital temperature sensor of direct output temperature value, and for example model is DS18B20, the device of LM75 etc.The present embodiment digit preference temperature sensor DS18B20, this temperature sensor uses the digital interface of monobus, hardware connects simple, and its worst error in the temperature range of 0 to 100 degree be ± 1.5 to spend, and can very well meet the technical requirement of this water dispenser.

Further, in the present embodiment, described liquid level voltage output Level, described fluid temperature output Temp, described the first power supply terminal Vcc1, described the second power supply terminal Vcc2 or described ground terminal GND, mode by plug connector or wire bonds is connected with outside host computer, so that the data of outside host computer receiving sensor output, and to this data analysis processing.

Preferably, the output voltage of described the first power supply terminal Vcc1 and the second power supply terminal Vcc2 is 5 volts.The power supply of above two power supply terminals uses the voltage of 5V (volt), can make liquid level detection circuit stably work, and the voltage of 5V can be compatible mutually with most SCM system, applies more convenient.

In the utility model embodiment, shell is generally installed on base 10, delivery port 101 sides of water dispenser are provided with and detect 101 belows, the mouth of a river and whether have the cup sense switch 102 of cup, see Fig. 2, can realize and prevent mistake water outlet by this cup sense switch 102, and can realize cup with regard to water outlet, cup leaves and just stops water outlet, be easy to use and can reasonable realization the operation of the random water yield, this cup sense switch 102 can adopt as the switch such as infrared switch or mechanical switch.See Figure 14,16, controller 9 is installed on top panel 11, and there is the opening of a circle at top panel 11 center, and the panel of controller 9 is that a circular size just can be embedded in the circular hole of top panel 11 too.As shown in figure 30, controller 9 is mainly made up of circuit board, display 91, control inputs module, display 91 can be liquid crystal display, light-emitting diode display, fluorescent tube display, at the present embodiment, using the liquid crystal display of dot matrix as preferred version, not only can show for example temperature of water in each container of detailed information using lattice lcd display as display device, the number of the water yield can also provide more human-computer interaction function with image, menu etc. form.Control inputs module is that the shuttle knob that flies of rotary encoder composition adds key switch, or all by key switch, or the input unit forming for touch-screen.Be combined as preferred embodiment with what fly that shuttle knob 92 adds two key switches in the present embodiment, fly shuttle knob 92 rotating directions and can realize increase, the minimizing of parameters, or the switching of menu item etc. function, two buttons are respectively that a definite button 93 and one cancel/return button 94.Taking the output function of the most crucial quantitative constant temperature water yield as example, the init state of screen shows temperature value and the water yield value that water outlet last time is set, rotation flies shuttle knob 92, temperature value increases or reduces with the step value (this value can be undertaken self-defined by setting options) of 1 or 0.5 degree, after arriving setting value, press definite button 93, rotation flies shuttle knob 92, water yield value increases or reduces with the step value (this value can be undertaken self-defined by setting options) of 1ml or 10ml or 50ml, after arrival setting value, press and determine that button 93 starts water outlet, the setting of the water yield can also be that length starts water outlet by definite button 93 in setting water yield value, discharge and determine that button 93 stops water outlet.

Controller 9 is with detecting the approaching sensor 95 of palm, this sensor can be pyroelectric infrared sensor, also can be the sensor of infrared emitting type, the sensor of the preferred infrared reflection type of the present embodiment, the infrared signal that infrared emission tube sends is anti-interference to realize by the modulation of 38KHz, and detection range is set to from 10 centimetres of left and right of controller.Can realize and in the time having palm to approach controller, automatically wake the microprocessor in controller up by this sensor, after being waken up, just puts by controller the hardware adaptor of bright display 91 and startup periphery, when machine does not operate within a certain period of time, thereby microprocessor cuts out and shows that entering dormancy realizes the object that reduces energy consumption and extend device service life.

The drive circuit of heat-generating pipe adopts optocoupler to drive silicon controlled mode, the optocoupler driving uses MOC3061, and this optocoupler is a slice silicon controlled special driving chip, carries zero passage detection, 9 of controllers need to be exported PWM and just can control the power of heat-generating pipe, make circuit simple and reliable.

The drive circuit of normal temperature water pump component 3, heat-exchanger pump assembly 5, refrigerator 7 is to use the pwm signal control that comes from controller 9 using MOSFET as switch element, and the water pump (in the time of independent employing transportation water pump assembly 8) adding water to hot water tank 4 and water pump (self-priming water pump 17) or the magnetic valve of adding water to normal-temperature water container 2 are used switching signal control taking MOSFET as switch element.

Controller uses the direct current supply of 12V, and power supply is Switching Power Supply, and Switching Power Supply has advantages of that the little efficiency high voltage range of volume is wide etc.

Application and the superior effect thereof of this use novel water dispenser are described below in conjunction with a kind of preferred control method of the utility model water dispenser, controller is according to different situations, make different adjustment to controlling parameter respectively, and the implication of letter in each formula be unitedly described as follows:

In following formula in the implication of letter, the milliliters/second of the unit of flow, the unit of power be watt, and chronomere is second, and temperature unit is degree Celsius,

The temperature (being target temperature) that TS user selects

The water temperature of TH hot water tank

The water temperature of TL normal-temperature water container

The working flow of FH heat-exchanger pump

The working flow of FL normal temperature water pump

The maximum stream flow of FHmax heat-exchanger pump

The maximum stream flow of FLmax normal temperature water pump

PH heater can provide for heat output hot water heating power

The refrigeration work consumption of PC refrigerator

PHmax heater can provide for heat output hot water peak power

The maximum refrigeration work consumption of PCmax refrigerator

Need to be described as follows for PHmax: what PHmax referred to is, and heater can provide for heating the peak power of output hot water, but not the maximum service rating of heater itself, than heating unit 44 described above, by the size of design metal tube 442, if the heat-generating pipe 441 of heating unit 44 is 60% to carrying out the efficiency of heating surface of post bake in hot water effluent's process, in the time of PH=PHmax, the operating power of the heat-generating pipe 441 of heating unit 44 should be PHmax/60% so; If adopt after-heater 45, because the heating power of the second heating tube 451 of after-heater 45 almost carries out post bake for hot water effluent's process entirely, so in the time of PH=PHmax, directly with the second heating tube 451 according to the power work of PHmax.

Each situation comprises as follows:

One,, in the time of TS>TH, when the temperature that user selects is greater than the water temperature of hot water tank, controller carries out following adjusting control:

Normal-temperature water air pump inoperative, makes FL=0;

Refrigerator is not worked, and makes PC=0;

And further judgement according to being related to control heat-exchanger pump between PHmax and FHmax × 4.2 × (TS-TH) of controller

The power P H of working flow FH and adjusting heater, comprising:

1) when PHmax>FHmax × 4.2 × (TS-TH) are when hot water output flow be maximum, and the power of heater is still enough large time

It is maximum stream flow FHmax that controller regulates heat-exchanger pump working flow FH, makes FH=FHmax;

Meanwhile, controller regulates the power P H of heater, makes PH=FHmax × 4.2 × (TS-TH);

2) when PHmax=FHmax × 4.2 × (TS-TH) when heat-exchanger pump output flow is maximum, the power of heater is followed when needing the power of heating equal

It is maximum stream flow FHmax that controller regulates heat-exchanger pump working flow FH, makes FH=FHmax;

Meanwhile, it is peak power PHmax that controller regulates the power P H of heater, makes PH=PHmax;

3) when PHmax<FHmax × 4.2 × (TS-TH) are when heat-exchanger pump output flow be maximum, when the power of heater is inadequate

It is peak power PHmax that controller regulates the power P H of heater, makes PH=PHmax;

Meanwhile, controller regulates heat-exchanger pump working flow FH, makes FH=PHmax ÷ (4.2 × (TS-TH)).

What be necessary explanation is the relation between PHmax and FHmax × 4.2 × (TS-TH), according to the formula Q=cm Δ T of specific heat capacity, specific heat of water holds for 4.2J/ (g DEG C), so water is being heated to TS temperature by TH temperature, according to the 1st) kind situation, the in the situation that of heat-exchanger pump maximum stream flow FHmax, needed heat is Q=4.2 × FHmax × t × (TS-TH), wherein t is the time, and so needed heating power is PH=Q/t=4.2 × FHmax × (TS-TH).Accordingly, according to the 3rd) plant situation, need to regulate according to the maximum heating power of heater the working flow of heat-exchanger pump, make FH=PHmax ÷ (4.2 × (TS-TH)).

Two,, in the time of TS=TH, when the temperature that user selects is greater than the water temperature of hot water tank, controller carries out following adjusting control:

Normal-temperature water air pump inoperative, makes FL=0;

Refrigerator is not worked, and makes PC=0;

Heater is not worked, and makes PH=0;

Thereby controller regulates heat-exchanger pump working flow, FH is that maximum stream flow FHmax obtains target water temperature TS, and wherein said FHmax is heat-exchanger pump maximum stream flow.

Three, in the time of TS> (TH-TL)/2+TL, it is the average water temperature that temperature that user selects is greater than hot water tank and normal-temperature water container, now, in the time of hot water and normal-temperature water mixing, need to input more hot water, controller carries out following adjusting control:

Heater is not worked, and makes PH=0;

Refrigerator is not worked, and makes PC=0;

Controlling heat-exchanger pump working flow FH is maximum stream flow FHmax;

Control and regulation normal-temperature water pump work flow FL, make FL=(TH-TS) × FHmax ÷ (TS-TL) thus obtain target water temperature; That is to say, control the working flow of normal temperature water pump according to the temperature difference of target water temperature and hot water and the working flow of the corresponding heat-exchanger pump of ratio of the temperature difference of target water temperature and normal-temperature water.If such as the hot water thermal insulating of hot water tank is at 80 DEG C, the normal-temperature water of normal-temperature water container is 20 DEG C, the target temperature that user selects is 60 DEG C, controlling heat-exchanger pump working flow is maximum stream flow FHmax, and the working flow FL of normal temperature water pump is (80-60) ÷ (60-20) × FHmax=1/2FHmax.

Four, in the time of TS=(TH-TL)/2+TL, it is the average water temperature that temperature that user selects equals hot water tank and normal-temperature water container, when now hot water and normal-temperature water are mixed, only need to input equally hot water and normal-temperature water, controller carries out following adjusting control:

Heater is not worked, and makes PH=0;

Refrigerator is not worked, and makes PC=0;

Control heat-exchanger pump working flow FH=normal-temperature water pump work flow FL, thereby obtain target water temperature;

Five, in the time of TS< (TH-TL)/2+TL, it is the average water temperature that temperature that user selects is less than hot water tank and normal-temperature water container, when now hot water and normal-temperature water are mixed, need to input more normal-temperature water, controller carries out following adjusting control:

Heater is not worked, and makes PH=0;

Refrigerator is not worked, and makes PC=0;

Controlling normal-temperature water pump work flow FL is maximum stream flow FLmax;

Control and regulation heat-exchanger pump working flow FH, make FH=(TS-TL) × FLmax ÷ (TH-TS) thus obtain target water temperature; The situation of this and TS> (TH-TL)/2+TL is similar, that is to say, control the working flow of heat-exchanger pump according to the temperature difference of target water temperature and hot water and the working flow of the corresponding normal temperature water pump of ratio of the temperature difference of target water temperature and normal-temperature water.If such as the hot water thermal insulating of hot water tank is at 80 DEG C, the normal-temperature water of normal-temperature water container is 20 DEG C, the target temperature that user selects is 40 DEG C, controlling normal-temperature water pump work flow is maximum stream flow FLmax, and the working flow FH of heat-exchanger pump is (40-20) ÷ (80-40) × FLmax=1/2FLmax.

Six,, in the time of TS=TL, when the temperature that user selects equals the water temperature of normal-temperature water container, controller carries out following adjusting control:

Heater is not worked, and makes PH=0;

Refrigerator is not worked, and makes PC=0;

Hot water air pump inoperative, makes FH=0;

The working flow FL of control and regulation normal temperature water pump is maximum stream flow FLmax, thereby obtains target water temperature;

Seven, in the time of TS<TL, the temperature that user selects is during lower than the water temperature of normal-temperature water container, and controller carries out following adjusting control:

Hot water air pump inoperative, makes FH=0;

Heater is not worked, and makes PH=0;

And further judgement according to being related to control normal temperature water pump between PCmax and FLmax × 4.2 × (TL-TS) of controller

The power P C of working flow FL and adjusting refrigerator, comprising:

1) when PCmax>FLmax × 4.2 × (TL-TS) are when normal-temperature water POF be maximum, and the power of refrigerator is still enough large time

It is maximum stream flow FLmax that controller regulates normal-temperature water pump work flow FL, makes FL=FLmax;

Meanwhile, controller regulates the power P C of refrigerator, makes PC=FLmax × 4.2 × (TL-TS);

2) when PCmax=FLmax × 4.2 × (TL-TS) are when normal-temperature water POF be maximum, when power that the power of refrigerator follows normal-temperature water to freeze is equal

It is maximum stream flow FLmax that controller regulates normal-temperature water pump work flow FL, makes FL=FLmax;

Meanwhile, it is peak power PCmax that controller regulates the power P C of refrigerator, makes PC=PCmax;

3) when PCmax<FLmax × 4.2 × (TL-TS) are when normal-temperature water output flow be maximum, when the power of refrigerator is inadequate

It is peak power PCmax that controller regulates the power P C of refrigerator, makes PC=PCmax;

Meanwhile, controller regulates normal-temperature water pump work flow FL, makes FL=PCmax ÷ (4.2 × (TL-TS)).

The principle of this and above-mentioned the first situation is similar, also be according to specific heat capacity formula Q=cm Δ T, specific heat of water holds for 4.2J/ (g DEG C), so water is being freezed to TS temperature by TL temperature, according to the 1st) kind situation, the in the situation that of normal temperature water pump maximum stream flow FLmax, needed refrigeration work consumption is PC=4.2 × FLmax × (TL-TS); .Accordingly, according to the 3rd) plant situation, need to regulate according to the maximum refrigeration work consumption of refrigerator the working flow of normal temperature water pump, make FL=PCmax ÷ (4.2 × (TL-TS)).

What need to further illustrate is, above-mentioned control method embodiment is just as preferred mode, and embodiment preferentially ensures that water pump is with maximum stream flow work separately, only have in the time that water pump is worked with maximum stream flow, when the heating power that heater or refrigerator are not enough to provide enough or refrigeration work consumption, just, according to the peak power of heater or refrigerator, adjust the flow of water pump.Such as, in the first situation, when TS>TH, and in the time of PHmax>FHmax × 4.2 × (TS-TH), controller control normal-temperature water air pump inoperative (FL=0), refrigerator is not worked (PC=0), if controller regulates heat-exchanger pump working flow, FH is maximum stream flow FHmax, i.e. FH=FHmax; The power P H of heater should be PH=FHmax × 4.2 × (TS-TH); If controller regulates heat-exchanger pump working flow, FH is the value FHx (being FHmax>FHx>0) within the scope of maximum stream flow, make FH=FHx, now the power P H of heater should be PH=FHx × 4.2 × (TS-TH); That is to say, now heat-exchanger pump is not with maximum stream flow work, and heater is correspondingly with less power work.Therefore, above-mentioned control method embodiment, as the preferred mode of one, is with in the situation that can obtaining target temperature, preferentially ensures that water pump is taking maximum stream flow work as prerequisite, like this, can make water yield maximize, and avoids user's stand-by period of fetching water long.

Further, what the normal temperature water pump of the applied water dispenser of above-mentioned control method and heat-exchanger pump adopted is constant displacement pump, and described constant displacement pump is provided with the encoder for detection of constant displacement pump rotating speed.Step S0 also comprises: before using water dispenser to fetch water, initialize setting, heat-exchanger pump to water dispenser and normal temperature water pump are set up by multiple rotating speed-flow correspondence table that equally distributed rotating speed forms between maximum (top) speed and minimum speed by test in the scope of maximum stream flow and minimum discharge, form are stored in the control system of controller, step S2 also comprises: the temperature of selecting according to user, when controller calculates heat-exchanger pump working flow FH and normal-temperature water pump work flow FL according to different situations, the control system of controller calculates heat-exchanger pump and normal temperature water pump tachometer value separately with reference to described rotating speed-flow correspondence table by algorithm according to calculated heat-exchanger pump working flow FH and normal-temperature water pump work flow FL, and at exiting water process, heat-exchanger pump and normal temperature water pump rotating speed are separately revised, make the flow of two pumps carry out work according to the ratio of specifying to adjust in real time the output controlled quentity controlled variable of two pumps, further, the water yield of selecting according to user, controller calculates heat-exchanger pump and normal temperature water pump needs the water yield of exporting separately, and calculate two water pumps umber of pulse that encoder separately will feed back under the water yield that needs separately output in conjunction with described rotating speed-flow correspondence table, and at exiting water process, the umber of pulse of constantly encoder feedback of heat-exchanger pump and normal temperature water pump being returned is at a certain time interval compared and calculates, and detects and whether reaches the water yield that user selects.By the application of encoder, the flow that can ensure heat-exchanger pump and normal temperature water pump, according to the ratio work of specifying, is further guaranteed the accuracy of leaving water temperature, and the accuracy of water yield, ensures and realizes constant temperature quantitative-outlet.

Visible by above-mentioned control method, the utility model embodiment can realize the adjusting to final outflow water temperature by such two class variables of the adjusting of heater (or refrigerator) and water pump (being specially heater heating power, refrigerator refrigeration work consumption, normal-temperature water pump work flow, four variablees of heat-exchanger pump working flow).Therefore, in the time of output hot water, can preferentially ensure that heat-exchanger pump is with maximum stream flow work, carry out the hot water temperature of regulation output by the heating power of heater (the especially function of post bake), thereby make in the situation that meeting constant temperature water outlet, water outlets in a large number, make water discharging time short, avoid user to wait as long for, overcome in prior art in the time obtaining hot water, water discharging time is slow, the defect that need to wait as long for.In the time will exporting cold water, be also same principle, preferentially ensure that normal temperature water pump, with maximum stream flow work, carrys out the cold water temperature of regulation output by the power of refrigerator, thereby guarantee a large amount of water outlets, reduce period of reservation of number.The utility model embodiment, by heat-exchanger pump and normal temperature water pump accurate water flow and water yield separately, has realized quantitative constant temperature output water; Increased the regulated variable of output hot water (or cold water) by the post bake function (or refrigerator) of heater, make user in the time of water intaking, can preferentially ensure that water pump, with maximum stream flow work, makes water yield large, period of reservation of number is short.

Above disclosed is only preferred embodiment of the present utility model, certainly can not limit with this interest field of the utility model, and the equivalent variations of therefore doing according to the utility model claim, still belongs to the scope that the utility model is contained.

Claims (22)

1. a water dispenser that can quantitative constant temperature water outlet, is characterized in that: described water dispenser comprises shell (1);

Normal-temperature water container (2), for exporting the normal temperature water pump component (3) of normal-temperature water, is provided with temperature sensor (21) in normal-temperature water container;

There is the hot water tank (4) of heat insulation function, for exporting the heat-exchanger pump assembly (5) of hot water, in described hot water tank, be provided with heater, in hot water tank, be provided with temperature sensor (41) and liquid level detection device (42);

Give the transportation water pump assembly of hot water tank water filling;

Be used for the hot-and-cold water mixer (6) of normal-temperature water and hot water mixing;

Control the controller (9) of water dispenser work.

2. water dispenser that can quantitative constant temperature water outlet as claimed in claim 1, is characterized in that: described normal temperature water pump component and heat-exchanger pump assembly adopt constant displacement pump.

3. water dispenser that can quantitative constant temperature water outlet as claimed in claim 2, is characterized in that: described constant displacement pump is gear pump.

4. water dispenser that can quantitative constant temperature water outlet as claimed in claim 2, it is characterized in that: the heat-exchanger pump (50) of described hot water tank is installed on described hot water tank (4) inside by a stand tube (52) that stretches into described hot water tank (4), the power transmission shaft (51) of described heat-exchanger pump is located in described stand tube (52), and the outer end of power transmission shaft (51) motor (58) outer with being installed on hot water tank (4) is in transmission connection or connects by shaft coupling.

5. water dispenser that can quantitative constant temperature water outlet as claimed in claim 4, it is characterized in that: described power transmission shaft (51) and motor (58) belt transmission, the belt pulley (53) on belt pulley (54) and power transmission shaft on motor arranges for slowing down.

6. water dispenser that can quantitative constant temperature water outlet as claimed in claim 2, it is characterized in that: the normal temperature water pump (30) of described normal-temperature water container (2) is installed on described normal-temperature water container (2) inside by a stand tube (32) that stretches into described normal-temperature water container (2), the power transmission shaft (31) of the normal temperature water pump (30) of described normal-temperature water container is located in described stand tube (32), and the outer end of power transmission shaft (31) motor (38) outer with being installed on normal-temperature water container (2) is in transmission connection.

7. water dispenser that can quantitative constant temperature water outlet as claimed in claim 6, it is characterized in that: the power transmission shaft (31) of the normal temperature water pump (30) in described normal-temperature water container (2) and motor (38) belt transmission, the belt pulley (33) on belt pulley (34) and power transmission shaft (31) on motor (38) arranges for slowing down.

8. water dispenser that can quantitative constant temperature water outlet as claimed in claim 2, is characterized in that: described normal temperature water pump component (3) and heat-exchanger pump assembly (5) comprise the encoder for detection of constant displacement pump rotating speed.

9. water dispenser that can quantitative constant temperature water outlet as claimed in claim 1, it is characterized in that: described normal temperature water pump and described be same pump to the transportation water pump of hot water tank water filling, adopt and comprise that two valves and two delivery ports can send water or the two-way pump to described hot water tank water filling to described hot-and-cold water mixer respectively.

10. water dispenser that can quantitative constant temperature water outlet as claimed in claim 1, is characterized in that: the heater in described hot water tank can carry out to the water of hot water tank post bake in exiting water process.

11. water dispensers that can quantitative constant temperature water outlet as claimed in claim 10, it is characterized in that: described heater and described heat-exchanger pump assembly are transported to the water-supply-pipe one of hot-and-cold water mixer and installed, described heater can heat the water of hot water tank, and can in water-supply-pipe, in hot-and-cold water mixer course of conveying, carry out post bake to it to hot water.

12. water dispensers that can quantitative constant temperature water outlet as claimed in claim 11, it is characterized in that: described heater comprises the metal tube (442) of an inner wall belt groove (443), be located at and be adjacent to described metal tube (442) inwall in metal tube (442) and the heat-generating pipe (441) of concentric installation, the groove (443) of described metal tube (442) inwall forms the aqueduct to hot-and-cold water mixer (6) water delivery, the bottom of described metal tube (442) is connected with the delivery outlet of heat-exchanger pump (50) by pipeline, the top of described metal tube (442) is connected with the hot water input port (62) of hot-and-cold water mixer (6) by pipeline.

13. water dispensers that can quantitative constant temperature water outlet as claimed in claim 12, it is characterized in that: the top of described metal tube (442) is connected with a tube connector (444) at the side of junction band opening (4441), the opening (4441) of the corresponding described tube connector of tube wall (444) on the top of described metal tube (442) is provided with fluting (4421), the fluting (4421) of described metal tube (444) and the pipeline of the opening (4441) of described tube connector (444) towards the hot water input port (62) of hot-and-cold water mixer (6), the electric wire of described heat-generating pipe (441) is drawn by the end of tube connector (444).

14. water dispensers that can quantitative constant temperature water outlet as claimed in claim 10, it is characterized in that: described heater comprises conventional heating device (440) and after-heater (45), described after-heater (45) comprises a metal tube (452), be located in metal tube (452) heat-generating pipe (451) with the concentric installation of metal tube (452), between described heat-generating pipe (451) and metal tube (452), there is annular flow channel (453), the bottom of described metal tube (452) is connected with the delivery outlet of heat-exchanger pump (50) by pipeline, the top of described metal tube (452) is connected with the hot water input port (62) of hot-and-cold water mixer (6) by pipeline.

15. water dispensers that can quantitative constant temperature water outlet as claimed in claim 1, it is characterized in that: described liquid level detection device is a liquid level sensor (200) can multiple spot detecting, described liquid level sensor (200) is the strip circuit board (201) of establishing liquid level detection circuit in one, described liquid level detection circuit comprises a resistance circuit being made up of N resistor in series, and correspondence is provided with N transistor, one end of described resistance circuit is connected with ground terminal, and the other end is liquid level voltage output; Each described transistorized colelctor electrode is connected on the series connection node of each resistor of described resistance circuit; Each described transistorized emitter stage is connected with ground terminal; Each described transistorized base stage is connected with an exploring electrode respectively; The respectively corresponding test point of each described exploring electrode; Described liquid level detection circuit is also provided with a voltage grading resistor, and one end of described voltage grading resistor is connected on described liquid level voltage output, and the other end is connected with the first power supply terminal; Described the first power supply terminal is powered to described liquid level detection circuit; Described the first power supply terminal can be connected with described exploring electrode conduction by liquid; Described liquid level detection circuit adopts insulating materials to seal all circuit except described exploring electrode, described the first power supply terminal and described liquid level voltage output.

16. water dispensers that can quantitative constant temperature water outlet as claimed in claim 15, is characterized in that: described circuit board is also provided with the public electrode not sealed by described insulating materials on (201); Described public electrode is connected with described the first power supply terminal by wire; Described public electrode can be connected with described exploring electrode conduction by liquid.

17. water dispensers that can quantitative constant temperature water outlet as claimed in claim 16, is characterized in that:

Described liquid level voltage output, described the first power supply terminal and described ground terminal are arranged on the top of described circuit board; The temperature sensor of described normal-temperature water container and the temperature sensor of hot water tank are located at respectively the bottom of described circuit board.

18. water dispensers that can quantitative constant temperature water outlet as claimed in claim 1, is characterized in that: the refrigerator (7) of connecting on the pipeline of described normal temperature water pump (30) and the normal-temperature water input port (61) of described hot-and-cold water mixer (6).

19. water dispensers that can quantitative constant temperature water outlet as claimed in claim 1, it is characterized in that: described water dispenser has self-priming water pump (17) or magnetic valve, the delivery outlet (172) of described self-priming water pump (17) or magnetic valve connects described normal-temperature water container (2) by pipeline, and the input port (171) of described self-priming water pump (17) or magnetic valve connects external water source interface (173) by pipeline.

20. water dispensers that can quantitative constant temperature water outlet as claimed in claim 1, is characterized in that: normal-temperature water container (2) top of described water dispenser is provided with water filling port that can Manual water injection.

21. water dispensers that can quantitative constant temperature water outlet as claimed in claim 1, is characterized in that:

Described hot water tank (4) adopts glass inner bag vacuum flask or double-layer stainless steel container.

22. as described in claim 1 to 21 any one can quantitative constant temperature water outlet water dispenser, it is characterized in that: described normal-temperature water container (2) around and surround described hot water tank (4).