WO2015085652A1

WO2015085652A1 - Drinking-water dispenser capable of discharging quantitative and constant-temperature water and control method for drinking-water dispenser to discharge water

Info

Publication number: WO2015085652A1
Application number: PCT/CN2014/001045
Authority: WO
Inventors: 何杰恩
Original assignee: 何杰恩
Priority date: 2013-12-11
Filing date: 2014-11-24
Publication date: 2015-06-18
Also published as: CN103622554A; CN103622554B

Abstract

A drinking-water dispenser capable of discharging quantitative and constant-temperature water comprises a shell (1); a normal-temperature water container (2) having a temperature sensor (21) provided therein, a normal-temperature water pump component (3) used for discharging normal-temperature water; a hot water container (4) with heat-preservation function, the hot water container (4) having a heating device, a temperature sensor (41) and a liquid level detection device (42) provided therein, a hot water pump component (5) used for discharging hot water; a delivery water pump component used for injecting water to the hot water container (4); a cold and hot water mixer (6) used for mixing the normal-temperature water and hot water; and a controller (9) used for controlling the drinking-water dispenser. The drinking-water dispenser controls the normal-temperature water pump component (3) and the hot water pump component (5) respectively to feed the normal-temperature water and the hot water to the cold and hot water mixer (6) at a certain speed or by a certain feeding mount according to a required temperature, and the normal-temperature water and the hot water are mixed to reach the required temperature or the required amount for discharging. A control method for the drinking-water dispenser to discharge quantitative and constant temperature water is also disclosed.

Description

Control method for water dispenser and water dispenser output water capable of quantitatively determining temperature and effluent

Technical field

The invention relates to a water dispenser, in particular to a water dispenser capable of quantitatively regulating water discharge and a control method for output water of a water dispenser.

Background technique

At present, there are not many water dispensers with the function of temperature regulation and immediate water discharge, especially the water dispenser that can quantitatively determine the temperature and output water. With the improvement of living standards, people have higher and higher requirements for drinking water. The precise and quantitative drinking water machine has become an urgent need in many aspects of daily life. For example, the water of baby milk powder not only has a specific temperature. The range also requires precise output water volume. Different types of tea leaves must be as close as possible to the optimum brewing temperature if they want to achieve the best brewing effect. As a point of use, it is hoped that such a water dispenser can immediately discharge water, conveniently adjust the output water temperature and water volume, and is a small size. In the era of promoting energy conservation and environmental protection, people also hope that such a product is an energy saving and waste reduction. The product.

At present, the water dispensers on the market and the patent documents related to the retrieved water dispensers, the water dispensers that realize the adjustable temperature output mainly have two ways of directly heating the water to a specified temperature and mixing the water according to the proportion of the hot water.

The direct heating method is also called the instant water dispenser. In this way, the water dispenser not only has problems of high power distribution, poor temperature control, waiting for water to be discharged, etc., but also measures to solve such problems. The problems of fouling, small flow rate, splashing of water, etc. make the structure of the machine complicated and costly. At present, there are many public water dispenser patents that use this method, but basically do not achieve accurate temperature and quantitative output around solving the above problems.

The method of mixing hot water and hot water according to the proportion of water is a better solution for realizing the temperature control water dispenser in the current technology, and the Chinese invention patent application with the publication number CN1500432A discloses a temperature-adjustable water dispenser. The invention patent application proposes two schemes for achieving proportional mixing of water, by controlling the on-off time of the solenoid valve and by controlling the flow rates of the two electric pumps. By controlling the energization time of the solenoid valve, the output temperature can only be controlled very roughly and is unstable. The method of controlling the flow rates of the two electric pumps of hot and cold water is theoretically the best solution, but the invention patent application has the following problems: 1. The hot water container does not propose an insulation scheme so that if the water of the hot water container is intended to be constant Frequent repeated heating of a certain temperature will consume a large amount of electrical energy. 2. Even if the invention patent application proposes an insulation scheme, if a temperature close to 100 degrees of water is required, the scheme must keep the water in the hot water tank at a temperature close to 100 degrees, which also consumes a relatively large amount of electricity, if the reduction is highest The temperature will reduce the range of use and inconvenience, as reflected in the temperature regulation method, the selected temperature can only be between the current water temperature of its high temperature water tank and low temperature water tank, beyond the temperature of the range Water is not available, so its use is limited. 3. The open technical solution is difficult to achieve mixing water in a precise ratio, no There are suggestions on how to achieve precise flow control. 4. In order to realize the output of cold water and hot water, three containers must be used. The heated water tank, the refrigerating water tank, the normal temperature drinking water storage tank, etc. all adopt the existing common structure, and they are independent of each other. The whole drinking fountain has a complicated structure and is not enough. Compact and bulky.

In addition, most of the prior art water dispensers have a defect that when the higher temperature water is output, the water output is usually small and the water waiting time is long.

Summary of the invention

In order to overcome the above-mentioned deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a water dispenser capable of accurately quantifying the temperature of the effluent water and immediately outputting any water of any temperature.

It is also an object of the present invention to provide a water dispenser that is more energy efficient and environmentally friendly.

Still another object of the present invention is to provide a water dispenser having a large amount of water when quantitatively venting water, and particularly when outputting a relatively high temperature water, it is also possible to preferentially ensure a large amount of water and a short waiting time for taking water.

The invention also provides a water dispenser with compact structure and small volume which can quantitatively determine the temperature and output water.

The invention further provides a control method for the output water of the water dispenser.

In order to solve the above technical problems and achieve the above object, the technical solution adopted by the present invention is:

A water dispenser capable of quantitatively determining temperature and effluent, the water dispenser comprising an outer casing; a normal temperature water container, a normal temperature water pump assembly for outputting normal temperature water, a temperature sensor in the normal temperature water container; a hot water container having a heat preservation function, a hot water pump assembly for outputting hot water, wherein the hot water container is provided with a heating device, a temperature sensor and a liquid level detecting device are arranged in the hot water container; a water pump assembly for injecting water into the hot water container; and the water and heat at normal temperature are used Water-mixed hot and cold water mixer; controller that controls the operation of the water dispenser. By controlling the normal temperature water pump assembly and the hot water pump assembly to input normal temperature water and hot water to the hot and cold water mixer at a certain rate (flow rate), and outputting the mixture, the water of the desired temperature can be obtained, and the normal temperature water pump assembly and the water temperature control unit are respectively controlled. When the hot water pump assembly outputs a certain amount of normal temperature water and hot water according to the respective flow rates, the water of the desired temperature can be quantitatively obtained. Moreover, according to the user's operation, the water dispenser can immediately output water of any temperature at any temperature. The hot water tank is designed with a heat preservation function, which can satisfy the hot water container to output hot water when needed (for mixing with normal temperature water or for direct water discharge), and at the same time has the effect of energy saving and environmental protection.

Preferably, the normal temperature water pump assembly and the hot water pump assembly employ a metering pump. More preferably, the metering pump uses a gear pump. Using a gear pump, the output water flow rate can be controlled by the rotational speed of its gear, and the amount of water can be controlled by the number of revolutions.

Further, the metering pump is connected with an encoder, and the encoder can be set to correct the correspondence between the speed and the flow rate in real time. Taking the gear pump as an example, the encoder can be set to detect the speed of the gear pump and the number of turns of the gear in real time, so as to accurately and accurately determine the speed of water delivery. During the operation, the number of pulses fed back by the encoder can be continuously compared and operated at a certain time interval, and the output control amount of the gear pump can be adjusted and corrected in real time so that the flow rates of the two pumps work according to a specified ratio. And real-time detection of whether the predetermined amount of effluent water is reached, ensuring constant speed quantification, constant speed (especially hot water and often The combination of warm water and precise control of the respective flow rates can further ensure the accuracy of the flow ratio of hot water and normal temperature water, so as to ensure the accurate quantification of the outlet water temperature (guarantee the accuracy of the water output) to ensure the precise temperature setting. Quantitative effluent.

As an improvement of the technical scheme of the water dispenser capable of quantitatively determining the temperature and effluent, the hot water pump of the hot water container is installed inside the hot water container through a bracket tube extending into the hot water container, the hot water pump The drive shaft is disposed in the bracket tube, and the outer end of the drive shaft is connected to a motor mounted outside the hot water tank or coupled through a coupling. Thus, in the specific installation, the hot water pump can be placed at the bottom of the container, and the motor is placed outside the container, which solves the problem that the motor is not properly operated by being placed in the hot water container.

As a preferred mode, the drive shaft and the motor belt drive, the pulley on the motor and the pulley on the drive shaft are set to decelerate. Of course, the drive shaft can also be driven by other gears such as motor gears. The encoder may be preferably mounted on the pulley of the motor. Since the pulley of the motor and the pulley of the drive shaft are set to deceleration, that is, the pulley of the motor is a small pulley, and the encoder is mounted on the pulley of the motor, then, correspondingly, The encoder disc of the encoder can also be small (relative to the large pulley mounted on the drive shaft), which facilitates the compactness of the internal structure of the dispenser.

As an improvement of the technical scheme of the water dispenser capable of quantitatively determining the temperature and effluent, the water inlet of the pump head of the hot water pump assembly is arranged at the bottom, and the water outlet is arranged at the upper part. Of course, this is not necessary, except that the water inlet is located at the bottom and the water outlet is located at the upper part, which is more in line with the needs of water flow. The use of other layouts is of course within the scope of the invention.

As an improvement of the embodiment of the water dispenser capable of quantitatively determining the temperature and effluent, the normal temperature water pump of the normal temperature water container is installed at the bottom of the normal temperature water container through a bracket tube extending into the normal temperature water container, the normal temperature water pump The drive shaft is disposed in the bracket tube, and the outer end is drivingly connected to a motor mounted outside the normal temperature water container. Preferably, the transmission shaft of the normal temperature water pump in the normal temperature water container is driven by the motor belt, the pulley on the motor and the belt on the transmission shaft are set to decelerate, and the encoder is mounted on the pulley of the motor. The installation method of the normal temperature water pump in the normal temperature water container is basically the same as the installation structure of the hot water pump assembly in the hot water container.

As an improvement of the embodiment of the water dispenser capable of quantitatively determining the temperature and effluent, the hot water pump and the normal temperature water pump may use other water pumps in addition to the gear pump described above, for example, as an alternative to the gear pump, the diaphragm The pump is also an option, and the diaphragm pump can be placed in the water dispenser container, but the diaphragm pump is more expensive and more noisy. In addition, a centrifugal pump is also an alternative if it is not necessary to strictly control the flow of water, i.e., to quantify the effluent.

As an improvement of the technical scheme of the water dispenser capable of quantitatively determining the temperature and effluent, the normal temperature water pump and the water supply pump for the hot water supply container are the same pump, and the utility model comprises two valves and two water outlets respectively The hot and cold water mixer supplies water or a two-way pump that injects water into the hot water container.

As an improvement of the technical scheme of the water dispenser capable of quantitatively determining the temperature and effluent, the heating device in the hot water container can reheat the water of the hot water container during the water discharge process. In the present invention, the water in the hot water container is pumped through the hot water pump The heating by the heating device before delivery is defined as one heating, and the water in the hot water container is transported by the hot water pump and is reheated by the heating device during the conveying process of the water pipe to be defined as secondary heating. Through the design of the secondary heating, the water in the hot water container can be kept at a lower temperature, and when it is required to output hot water higher than the temperature of the heat insulating water of the hot water container, the power of the heating device is adjusted (if necessary, combined Adjusting the flow rate of the hot water output from the hot water pump), so that the output heat preservation water is heated to a specified temperature during the transportation process, and hot water higher than the heat insulating water can be obtained. This kind of non-high temperature insulation solution undoubtedly has the effect of energy saving and environmental protection when it can instantly obtain high temperature hot water (or it can instantly obtain higher temperature hot water while maintaining lower temperature insulation to save energy). Has significant advantages. In addition, by the secondary heating function of the heating device, it is also possible to increase a regulating variable when adjusting the temperature of the water, so that when the hot water of the specified temperature is obtained, the water pump can be preferentially protected from the large amount of water (when the pump is operated at the maximum flow rate) By adjusting the power of the heating device to adjust the temperature of the hot water output), in the present invention, it will be further explained in connection with the temperature control method.

In order to realize the above secondary heating function, specifically, the heating device is integrally installed with the water pipe of the hot water pump assembly that supplies water to the hot and cold water mixer, and the heating device can heat the water of the hot water container, and The hot water can be reheated in the process of conveying the water in the water pipe to the hot and cold water mixer. Further, the heating device comprises a metal tube with a groove on the inner wall, a heat pipe disposed in the metal tube and closely attached to the inner wall of the metal tube and concentrically mounted, and the groove of the inner wall of the metal tube is formed to mix cold and hot water. The water delivery pipe of the water pipe is connected to the outlet of the hot water pump through a pipe, and the top end of the metal pipe is connected to the hot water inlet of the hot and cold water mixer through a pipe. In this way, the heating pipe can normally heat the water in the hot water container through the metal pipe (ie, one heating); and the water in the hot water container can be heated by the hot water pump when transported from the water pipe formed by the groove. Secondary heating.

Further, the top end of the metal pipe is connected with a connecting pipe with an opening at the side of the joint, and the pipe wall of the top end of the metal pipe is provided with a slot corresponding to the opening of the connecting pipe, and the metal pipe is slotted. An opening to the hot water inlet of the hot and cold water mixer is connected to the opening of the connecting pipe, and the electric wire of the heat pipe is taken out through the end of the connecting pipe.

In order to achieve the above secondary heating, the present invention is another improvement of the technical scheme of the water dispenser capable of quantitatively determining the temperature and effluent, the heating device comprising a conventional heater and a secondary heater, the secondary heater comprising a metal tube a heat pipe disposed in the metal pipe concentrically with the metal pipe, the heat pipe and the metal pipe having an annular water flow passage, and the bottom end of the metal pipe is connected to the output port of the hot water pump through a pipe, the metal pipe The top is connected to the hot water inlet of the mixer. That is to say, the conventional heater (for one-time heating) and the secondary heater are separated, and the secondary heater is separately used for secondary heating during the hot water conveying process, which greatly improves the secondary heating efficiency.

As an improvement of the technical scheme of the water dispenser capable of quantitatively determining the temperature and effluent, the liquid level detecting device is a liquid level sensor capable of detecting multiple points, and the liquid level sensor is a strip of a liquid level detecting circuit. a circuit board, the liquid level detecting circuit comprises a resistor circuit consisting of N resistors connected in series, and correspondingly provided with N transistors, one end of the resistor circuit is connected to the ground terminal, and the other end is a liquid level voltage output end a collector of each of the transistors is connected to a series node of each resistor of the resistor circuit; an emitter of each of the transistors is connected to a ground terminal; The bases of the transistors are respectively connected to a detecting electrode; each of the detecting electrodes respectively corresponds to a detecting point; the liquid level detecting circuit is further provided with a voltage dividing resistor, and one end of the voltage dividing resistor is connected to the The other end is connected to the first power supply terminal; the first power supply terminal supplies power to the liquid level detecting circuit; the first power supply terminal is electrically connected to the detecting electrode through a liquid; The liquid level detecting circuit seals all circuits except the detecting electrode, the first power supply terminal, and the liquid level voltage output terminal with an insulating material. The detection principle of the liquid level sensor is: when a certain detecting electrode is submerged under the liquid surface, the first power supply terminal is electrically connected to the detecting electrode through the liquid due to the conductivity of the liquid, and therefore, the first power supply terminal The connection between the detecting electrode and the detecting electrode is equivalent to being connected through a resistor, so that the transistor connected to the detecting electrode is turned on, that is, the collector and the emitter of the transistor are electrically connected, and the corresponding series node of the resistive circuit is led. To the ground terminal, and short-circuit other resistors located below the liquid surface, thereby changing the resistance value of the resistance circuit; and the change of the resistance value of the resistance circuit will cause the power supply voltage outputted by the first power supply terminal to be on the resistance circuit The pressure is changed. Therefore, by using the relationship between the resistance value of the resistance circuit, the output voltage value of the liquid level detection output terminal, and the liquid level height, the liquid level can be calculated by collecting the voltage value of the liquid level voltage output terminal of the resistance circuit. height. The above liquid level sensor in the technical solution of the present invention utilizes the physical characteristics of the transistor, combined with the flexible design of the resistance circuit, so that when the liquid level is at a position of different detecting electrodes, the liquid level voltage output end outputs different voltage values, thereby according to the specific The output voltage value is known as the current liquid level position, the design is flexible, and the liquid level detecting circuit has a simple structure, can be set as a circuit board, has a small occupied space, and is particularly convenient to install, and further facilitates the normal temperature water container of the present invention. Installation of the temperature sensor in the hot water tank. According to the needs of detection accuracy, multiple detection electrodes can be designed.

As an improvement of the above scheme, the resistance value R _m of the resistor of the mth series node of the resistance circuit is related to the resistance R _{0 of the} voltage dividing resistor:

Where m is a positive integer and 1≤m≤N-1;

The sum of the resistance values of the first resistor to the mth resistor from top to bottom of the liquid level detecting circuit; and, when m=N, the resistance value R _{N of the Nth} resistor is a custom resistance value. R _r , or, the Nth resistor is removed in the resistor circuit. And R & lt resistance value R1 of _m to m-th node of the first resistor connected in series to said level detecting circuit top-down resistor. By adopting the above formula, the output voltage value of the liquid surface voltage output terminal Level is m/N times of the power supply voltage of the first power supply terminal Vcc1 when the liquid level is located at different detecting electrodes Pm. For example, when the liquid surface just does not pass the second detecting electrode P2, the output voltage value of the liquid level voltage output terminal Level is (2/N)*Vcc1.

Further, the resistance value of the mth resistor in the resistance circuit is:

Moreover, when m=N, the resistance value R _{N of the Nth} resistor is a custom resistance value R _r , or the Nth resistor is removed in the resistance circuit to achieve a resistance value. R _N is an infinite value. Further, the circuit board is further provided with a common electrode that is not sealed by the insulating material; the common electrode is connected to the first power supply terminal through a wire; and the common electrode is electrically conductive with the detecting electrode through a liquid connection. Since the detecting electrode P _n of the liquid level detecting circuit is connected to the first power supply terminal Vcc1 by the liquid as the transmission medium, and the respective detecting electrodes P _{n are} evenly distributed along the circuit board 100 from top to bottom, the liquid level detecting The circuit has a detection range (eg, 200 mm), that is, when the detecting electrode _Pn is far from the first power supply terminal Vcc1, some transistors may not be turned on. Therefore, according to actual needs, one or more common electrodes T _x (x=1, 2, . . . ) connected to the first power supply terminal Vcc1 may be further disposed, so that the liquid level detecting circuit P _n detection electrode may be connected by a common electrode T _x and the first power supply terminal Vcc1, thereby ensuring respective transistors Qn (n = 1,2, ......, N) to work properly. Depending on the depth of the hot water container of the water dispenser and the temperature of the normal temperature water container, a common electrode may be disposed at the bottom and/or the middle of the circuit board. Of course, a larger number of common electrodes may be disposed at other locations depending on the application.

Specifically, the liquid level voltage output end, the first power supply terminal and the grounding terminal are disposed at a top of the circuit board; the temperature sensor of the normal temperature water container and the temperature sensor of the hot water container may be respectively set At the bottom end of the circuit board. The liquid level sensor designed by the invention provides a good installation position for the temperature sensor of the normal temperature water container and the hot water container.

As an improvement of the technical scheme of the water dispenser capable of quantitatively determining the temperature and effluent, the room temperature water pump and the inlet of the hot and cold water mixer are connected in series with a refrigerator.

Further, the refrigerator is a semiconductor refrigerator, and the semiconductor refrigerator includes a semiconductor refrigerating sheet, a heat exchanger, and a radiator. One of the interfaces of the heat exchanger is connected to an output port of a normal temperature water pump, and the other interface is connected to the cold. The input port of the hot water mixer.

As an improvement of the embodiment of the water dispenser capable of quantitatively determining the temperature and effluent, the water dispenser has a self-priming pump or a solenoid valve, and the outlet of the self-priming pump or the solenoid valve is connected to the room temperature water container through a pipe. The input port of the water suction pump or the solenoid valve is connected to the external water source interface through a pipe. Further, a filter is connected in series with the pipeline between the input port of the self-priming pump or the solenoid valve and the external water source interface.

As another way of injecting water into the normal temperature water container, the upper portion of the normal temperature water container of the water dispenser is provided with a water injection port that can be manually filled with water.

Further, the hot water container is a double stainless steel container or a glass liner thermos bottle.

In order to facilitate the use of the water dispenser of the present invention, a switch for detecting whether there is a cup may be provided at the water outlet. A sensor for detecting the proximity of the palm may be provided on the operating area of the controller.

Further, as an improvement of the technical scheme of the water dispenser capable of quantitatively determining the temperature and effluent, the normal temperature water container surrounds and surrounds the hot water container. The structure design can make the inner space of the water dispenser more fully utilized. Compared with some existing water dispensers, each container uses one container as the normal temperature water container and the hot water container, and separates from each other, the structure of the invention is more Compact, small and beautiful.

The invention also provides a control method for the output water of the water dispenser, which is applied to the constant temperature and water discharge control of the water dispenser, the water dispenser comprises a normal temperature water container, a normal temperature water pump assembly for outputting normal temperature water, and a temperature sensor in the normal temperature water container. a hot water container having a heat insulating function, a hot water pump assembly for outputting hot water, a heating device in the hot water container, a temperature sensor and a liquid level detecting device in the hot water container; and water injection into the hot water container a water pump assembly; a hot and cold water mixer for mixing normal temperature water and hot water; a controller for controlling the operation of the water dispenser; and the water dispenser further having a refrigerator capable of cooling the normal temperature water of the normal temperature water container during the water discharge process The heating device may perform secondary heating on the hot water of the hot water container in the water discharging process, and the method includes:

Step S1: When the water dispenser is turned on and works normally, the controller detects the temperature TL of the normal temperature water in real time through the temperature sensor of the normal temperature water container, and detects the temperature TH of the hot water in real time according to the temperature sensor of the hot water container;

Step S2: The controller determines the relationship between the selected water temperature TS and the water temperature TH of the hot water container and the water temperature TL of the normal temperature water container according to the water temperature TS selected by the user, and controls according to the relationship between the TS and the TH and the TL. The heating power PH, and/or the regulating refrigerator, respectively, by adjusting the hot water pump working flow FH in the hot water tank, and/or adjusting the heating device in the hot water container to heat the hot water in the hot water container during the water discharging process The cooling power PC for cooling the water in the normal temperature water container during the water discharge process, and/or adjusting the working flow rate FL of the normal temperature water pump in the normal temperature water container to obtain the target water temperature TS, and obtaining the target water amount according to the water discharge time.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below.

1 is a top plan view of an embodiment of a water dispenser capable of quantitatively determining temperature and effluent;

Figure 2 is a cross-sectional view taken along line B-B of Figure 1;

Figure 3 is a cross-sectional view taken along line C-C of Figure 1;

Figure 4 is a structural view of a gear pump in an embodiment of the present invention;

Figure 5 is a schematic structural view of a hot water pump assembly 5 in an embodiment of the present invention;

Figure 6 is a top plan view of the hot water pump assembly 5 of the embodiment shown in Figure 5;

Figure 7 is a cross-sectional view taken along line J-J of Figure 6;

8 is a schematic structural view of an embodiment of a normal temperature water pump assembly 3 according to an embodiment of the present invention, wherein the normal temperature water pump is a one-way pump and is only used to input normal temperature water to the hot and cold water mixer;

Figure 9 is a top plan view showing the normal temperature water pump assembly 3 of the embodiment shown in Figure 8;

Figure 10 is a cross-sectional view taken along line K-K of Figure 9;

11 is a schematic structural view of another embodiment of a normal temperature water pump assembly 3 according to an embodiment of the present invention, wherein the normal temperature water pump is a two-way pump for inputting normal temperature water to the hot and cold water mixer, and simultaneously injecting water into the hot water container;

Figure 12 is a perspective view showing the structure of the normal temperature water gear pump head in the embodiment shown in Figure 11;

Figure 13 is a cross-sectional view of the normal temperature water gear pump head of the embodiment shown in Figure 12;

Figure 14 is a schematic view of the internal structure of an embodiment of the present invention, wherein the normal temperature water pump assembly 3 uses the two-way pump shown in Figure 11;

15 is a schematic structural view of an embodiment of the present invention, in which the outer casing 1 is hidden, and the normal temperature water pump assembly 3 is a one-way pump, and the water dispenser is provided with a water pump assembly for pumping water from the normal temperature water container 2 to the hot water container 4. 8;

Figure 16 is a structural view of another perspective of the embodiment shown in Figure 15, in which the normal temperature water pump assembly 3 and the delivery pump assembly 8 are simultaneously shown;

Figure 17 is a schematic view of the internal structure of the embodiment shown in Figure 15, in which the outer casing 1, the inner cylinder bracket 14, the hot water container, the cap and the like are hidden, and the normal temperature water pump assembly 3 and the water pump assembly 8 are simultaneously shown. And hot water pump assembly 5;

Figure 18 is a front elevational view of the refrigerator in the embodiment of the present invention;

Figure 19 is a plan view of the refrigerator of the embodiment shown in Figure 18;

Figure 20 is a cross-sectional structural view of a heating device used in an embodiment of the present invention, wherein the heating device includes only one heating unit 44;

Figure 21 is a partial enlarged view of a region I in Figure 20;

Figure 22 is a vertical sectional view of the heating device in the embodiment shown in Figure 20;

Figure 23 is a cross-sectional view taken along line N-N of Figure 22;

Figure 24 is a cross-sectional structural view of a heating device used in another embodiment of the present invention, wherein the heating device comprises a conventional heating tube 440 and a secondary heater 45;

Figure 25 is a cross-sectional view of the secondary heater 45 in the embodiment shown in Figure 24;

Figure 26 is a schematic structural view of a liquid level detecting device in an embodiment of the present invention;

Figure 27 is a side view of Figure 26;

Figure 28 is a schematic diagram showing two circuit diagrams of the liquid level detecting device in the embodiment of the present invention, wherein in Figure 28(a), the resistor circuit has an Nth resistor, and in Figure 28(b), the resistor circuit is removed. The Nth resistor, such that R _N takes an infinite value;

29 is a circuit schematic diagram of a liquid level detecting circuit as a function of a liquid level;

FIG. 30 is a schematic structural diagram of the controller 9 in the embodiment of the present invention.

Description of the reference signs:

Enclosure 1 Base 10 Dispenser water outlet 101 Cup detection switch 102 Top panel 11

Semicircular annular cover 111 bottom plate 12 rubber seat 13 inner cylindrical bracket 14 lower annular surface 141

Upper annular surface 143

Long strip bracket 15 sink 16 self-priming pump 17 input port 171 output port 172

External water source interface 173

Hard tube 174 filter 175

Level sensor 200 circuit board 201 circuit board top 202 temperature sensor 203 at the bottom of the board

Normal temperature water container 2 temperature sensor 21 first liquid level detecting device 22 drain pipe 23 notch 231

Opening 24

Normal temperature water pump assembly 3 Normal temperature water pump 30 Normal temperature water gear pump head 300 First valve 301

Second valve 302

First valve plug 303 second valve plug 304 bracket 305 first water outlet 306 second water outlet 307

Drive shaft 31 Normal temperature water pump assembly Gear pump head water inlet 311 Normal temperature water pump assembly Gear pump head water outlet 312

Bracket tube 32 Large pulley 33 Small pulley 34 Encoder 35 Photoelectric switch 36 Belt 37

Motor 38

Normal temperature water pump seat 39

Hot water tank 4 temperature sensor 41 water inlet 411 of hot water tank second liquid level detecting device 42

Cork 43

Silicone sleeve 431 heating device heating unit 44 heating tube 441 heating tube wire 4411

Metal tube 442 Slot 4421 Interface 4422 Groove 443 Connection tube 444 Opening 4441

Conventional heating tube 440 secondary heater 45 second heating tube 451 second metal tube 452

Annular water flow channel 453

Hot water pump assembly 5 hot water pump 50

Hot water gear pump head 500 drive gear 501 driven gear 502 water inlet 503 water outlet 504

Drive shaft 51 hot water pump assembly gear pump head inlet 511 hot water pump assembly gear pump head outlet 512

Bracket tube 52 large pulley 53 small pulley 54 encoder 55 photoelectric switch 56 belt 57

Motor 58

Hot and cold water mixer 6 Normal temperature water inlet 61 Hot water inlet 62

Refrigerator 7 semiconductor refrigeration sheet 71

Heat exchanger 72 heat exchanger input 721 heat exchanger output 722 heat exchanger output water pipe 723

Radiator 73 fan 74

Transfer pump assembly 8 Controller 9 Display 91 Shuttle knob 92

OK button 93 Cancel/Return button 94 Sensor 95

Detailed ways

Specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

An embodiment of the water dispenser capable of quantitatively determining the temperature and output of water, as shown in FIG. 1, FIG. 2 and FIG. 3, comprises a casing 1; a normal temperature water container 2, a normal temperature water pump assembly 3 for outputting normal temperature water, and a normal temperature water container 2 There is a temperature sensor 21 for detecting the temperature of the normal temperature water, a hot water tank 4 having a heat preservation function, a hot water pump assembly 5 for outputting hot water, and a heating device for detecting the temperature of the hot water in the hot water tank 4. a temperature sensor 41 and a liquid level detecting device 42 for detecting the amount of hot water (hereinafter referred to as "second liquid level detecting device 42"); a water pump assembly for injecting water into the hot water container; and hot and cold for mixing normal temperature water and hot water Water mixer 6; a controller that controls the operation of the water dispenser. According to the embodiment of the present invention, the normal temperature water pump assembly 3 and the hot water pump assembly 5 are respectively controlled to input the normal temperature water and the hot water to the hot and cold water mixer 6 at a certain rate (flow rate) according to the required temperature, and are mixed and output, that is, The water of the required temperature can be obtained, and the normal temperature water pump assembly 3 and the hot water pump assembly 5 are respectively controlled to output a certain amount of normal temperature water and hot water according to the respective flow rates, thereby obtaining the water of the desired temperature. The hot and cold water mixer 6 is a structurally similar tee interface, and the two input ports include a normal temperature water inlet 61 and a hot water inlet 62 which are parallel to each other in the horizontal direction and then converge in a vertical downward blind. Hole, and finally install the output.

The hot water container 4 has a heat preservation function, and specifically can be a double-layer stainless steel container or a glass liner thermos bottle of a hot water bottle. The heat preservation performance of the stainless steel container is worse than that of the glass inner tank, but the stainless steel container is not easy to be broken, and the glass liner is not easy to be broken. The thermos bottle can provide very good thermal insulation performance and low cost. The energy saving effect of using the glass inner liner as the thermal insulation container is also very obvious. After testing, it takes 6 hours for the water in the qualified glass liner thermos to drop from 95° to 85°, and the heat preservation effect is very superior. The hot water container 4 is provided with a heat preservation function, so that it can satisfy the effect that the hot water container outputs hot water when needed (for mixing with normal temperature water or for direct hot water), and at the same time, energy saving and environmental protection. It should be further noted that in the existing water dispensers, double-layer stainless steel containers are mostly used for heat preservation without using a glass liner thermos bottle, and the double-layer stainless steel container is convenient for hot water, and a water outlet is arranged under the container, and a solenoid valve is passed through the solenoid valve. Or other common one-way valves can be achieved. If a glass liner thermos bottle is used, the effluent is a problem that needs to be overcome. It is difficult for the glass liner thermos to discharge hot water at the bottom of the hole. If a self-priming pump such as a diaphragm pump is used to discharge hot water at the top, the pump is on the other hand. The cost is higher, on the other hand, the noise is higher, and it is not a good choice for drinking fountains. The invention overcomes the defects of the prior art well, and can conveniently use the glass liner thermos bottle for hot water heat preservation in the water dispenser. The present invention also provides a non-high temperature insulation solution that reduces the holding temperature while simultaneously outputting hot water at a time when needed, as will be further described below.

In the present embodiment, as shown in FIG. 2 and FIG. 3, the outer casing 1 is a cylindrical structure including an inner cylindrical bracket 14 having a top panel 11 at the top and a bottom plate 12 near the bottom, and a circle in the middle of the bottom plate. The hole is used for accommodating the rubber seat 13 of the fixed hot water tank 4. The bottom of the inner cylinder bracket 14 has an inward annular surface 141 (hereinafter referred to as "lower annular surface"), and a coil of evenly distributed screw holes for the outer casing 1 is provided thereon. Fixedly, a wall of the inner cylinder bracket 14 is in contact with the bottom of the outer casing 1 with a ring of seals. The top of the inner cylinder bracket has an outward annular shape, and the outer diameter of the annular ring is equal to the diameter of the inner wall of the outer casing 1, so that the outer casing 1 The inner cylinder holder 14 constitutes an ambient temperature water container 2 in the shape of an annular cylinder. With such a configuration, the hot water container 4 is surrounded and surrounded by the normal temperature water container 2, that is, the hot water container 4 is located in the small circular inner cavity portion of the normal temperature water container 2, and the entire water dispenser appears compact and compact. Of course, the normal temperature water container can also be set as a square cylinder in a similar manner, and a cavity can also be provided in the normal temperature water container to place the hot water container, and the ambient temperature water container surrounds and surrounds the water container, and the water dispenser can also obtain the structure. Compact, compact and beautiful. More preferably, the ambient temperature water container 2 and the hot water container 4 of the water dispenser are assembled in a concentric manner. The components of the embodiment of the water dispenser of the present invention are modularly assembled in the form of components, which are convenient to install and disassemble, and are easy to clean. For example, if the outer casing is taken out, the normal temperature water container can be cleaned.

On the outward annular surface (hereinafter referred to as "upper annular surface 143") at the top of the inner cylindrical bracket 14, an elongated bracket plate 15 is fixed by screws, and the bracket plate 15 is provided near the top of the outer casing 1 for The normal temperature water pump assembly 3 and the hot water pump assembly 5 are fixed. The normal temperature water container 2 has a drain pipe 23, and the drain pipe 23 is preferably a rigid pipe which passes through the bottom to reach the top of the normal temperature water tank 2, and has a notch 231 at the top edge of the drain pipe 23. When the water level reaches the top of the normal temperature water tank 2, water can flow from the gap 231 into the drain pipe 23, and the drain pipe 23 can also serve as an exhaust pipe. The water gas generated by the heating of the hot water tank 4 can pass through the normal temperature water container. 2 The channel for adding water is returned to the normal temperature water container 2, and then discharged through the drain pipe 23, which is advantageous for the safe use of the water dispenser.

Further, the normal temperature water pump assembly and the hot water pump assembly use a quantitative pump, and the so-called quantitative pump refers to a pump whose theoretical displacement per revolution is constant. The flow rate of the dosing pump is proportional to the speed of the pump. The amount of water output is proportional to the number of turns of the pump. With this characteristic of the dosing pump, the specified flow rate can be obtained by controlling the speed and number of revolutions of the motor that drives the pump. And output water volume. Common dosing pumps, including gear pumps, diaphragm pumps, plunger pumps, peristaltic pumps, etc. In some embodiments of the present invention, the above-described metering pump may be employed to obtain water of a desired temperature by separately controlling the output flow rates of hot water and normal temperature water.

In the embodiment of the present invention, the heat pump assembly and the normal temperature water pump assembly preferably use a gear pump. The gear pump is a quantitative pump, and its flow formula is Q=2πzm ² bn×10 ^-3 η, n is the gear pump speed, and η is the gear pump. The working efficiency, z is the number of teeth of the gear of the gear pump, m is the modulus of the gear, and b is the tooth thickness of the gear. From the formula, it can be seen that the flow of the gear pump has a strict correspondence with the rotational speed, and the gear pump can accurately Control the speed of the flow and the amount of water output. In the present embodiment, the gear pump head is composed of two gears having a modulus of 1 and a number of teeth of 10, and the tooth thickness is 6 mm. The gear pump can provide a flow rate of about 2000 ml per minute at a rotational speed of 6000 rpm (with a gear pump). The working efficiency is 90%). As shown in FIG. 4, the gear pump head 500 of the gear pump includes a driving gear 501 and a driven gear 502 that mesh with each other, and the water of the water inlet 503 of the gear pump head follows the gear teeth of the driving gear 501 and the driven gear 502. The rotation is output from the water outlet 504, and the speed of the gear can be controlled to control the flow rate of the output water flow, and the number of turns of the gear can be controlled to control the water volume of the output water. Moreover, the hot water is quantitatively outputted more accurately, and the gear pump is also connected with an encoder disk. Connecting the gear pump to the encoder is due to the following considerations: The encoder can be set to detect the speed of the gear pump and the number of turns that have been turned, resulting in a more accurate fixed-speed water delivery. During the operation, the number of pulses fed back by the encoder can be continuously compared and operated at a certain time interval, and the output control amount of the gear pump can be adjusted and corrected in real time so that the flow rates of the two pumps work according to a specified ratio. And real-time detection of whether the predetermined amount of effluent water is reached, ensuring constant speed quantification, constant speed (especially the mixing of hot water and normal temperature water, precise control of the respective flow rates, in order to further ensure the precise temperature of the effluent) constant temperature (guaranteed Accurate water volume ensures maximum accurate temperature and quantitative effluent. In addition, due to the existing gear pump products, the corresponding relationship between the flow rate and the speed is often in an ideal state. Although the gear pump products on the market can work toward the accuracy of better flow speed, it is always difficult to avoid Error, setting the encoder can overcome the above error defects of the existing gear pump products, thereby further ensuring the output flow and output capacity of hot water and normal temperature water. Of course, in other embodiments, a non-gear pump such as a diaphragm pump, a plunger pump, a peristaltic pump, or the like may be used, and an encoder may be provided to correct the rotational speed of the water pump in the work of the water dispenser.

Specifically, the gear pump in the hot water tank 4 is installed inside the hot water tank 4 through a bracket tube 52 extending into the hot water tank 2, preferably at the bottom, as shown in FIGS. 5-7, and FIG. 5 is an embodiment of the present invention. FIG. 6 is a schematic plan view of the heat pump assembly 5 of the embodiment shown in FIG. 5; FIG. 7 is a cross-sectional view taken along line JJ of FIG. In the present embodiment, the hot water pump assembly 5 includes a hot water pump 50 (using a hot water gear pump head 500), a drive shaft 51, a bracket tube 52, a large pulley 53, a small pulley 54, an encoder 55, a photoelectric switch 56, and a belt 57. , motor 58 and associated fittings and piping. The two ends of the bracket tube 52 made of a stainless steel tube are respectively fixed to the bottle stoppers 43 of the gear pump head 500 and the hot water tank 4 by means of tight fitting, and the transmission shaft 51 in the tube is also extended correspondingly. Make the gear of the hot water pump The pump head 500 penetrates deep into the bottom of the hot water tank 4 and the motor portion can be placed outside the hot water container, solving the problem that the motor is not properly operated by being placed in the hot water container. The motor 58 and the drive shaft 51 are driven by a pulley so that the motor 58 can be mounted beside the drive shaft 51 and located in the gap of the upper portion of the hot water tank 4 of the glass bottle, thereby making the structure compact and space-saving, and the pulley on the motor. (ie, the small pulley 54) and the pulley on the drive shaft (ie, the large pulley 55) are set to decelerate. The higher the speed of the micro DC motor is, the higher the output power is, but the gear pump will work at too high speed. Great impact on life, so deceleration through the pulley can reduce the volume of the motor while obtaining the proper flow. Of course, the drive shaft 51 can also be connected to the motor 58 outside the hot water tank 4 by other means, such as gear transmission, in addition to the transmission connection mode, the coupling can also be connected through the coupling, and of course also falls into the protection of this patent. range. An encoder 55 is mounted on the small pulley 54 of the motor 58. Since the small pulley 54 connecting the motor is smaller, the encoder disk of the encoder 55 mounted thereon can also be smaller, so that the internal structure of the water dispenser is compact, and if When the encoder 55 is mounted to the large pulley 53 of the drive shaft, the encoder disk of the encoder 55 is also larger. A photoelectric switch 56 is mounted beside the encoder 55 for detecting the rotational speed of the motor 58 and the number of turns that have been rotated, thereby accurately quantifying the output of hot water at a constant speed. The water inlet 511 of the hot water pump assembly is at the bottom of the gear pump head 500, and the water outlet 512 is at the upper part of the gear pump head 500, so that the water at the bottom of the container can be pumped and the water outlet 512 is conveniently connected to the subsequent heat generating device, of course, the hot water pump The position of the water inlet 511 and the water outlet 512 should not impede the scope of protection of the present invention, and other positions of the water inlet 511 and the water outlet 512 should be considered to fall within the scope of protection of the present invention. The water inlet 411 of the hot water container is provided in the stopper 43, and the stopper 43 plays several roles here: a, sealing heat insulation as the hot water container 4; b, fixing the hot water container 4; c, as a hot water pump assembly 5 and the liquid level sensor and temperature sensor assembly and the fixing seat of the heating device which will be described below. The material of the stopper is insulated with a non-toxic material such as POM, and a silicone sleeve 431 is added in order to tightly bond the stopper to the mouth of the hot water container.

The structure of the normal temperature water pump assembly 3 is substantially the same as that of the above-described hot water pump assembly 5, as shown in FIG. 8-10. FIG. 8 is a schematic structural view of an embodiment of the normal temperature water pump assembly 3 according to the embodiment of the present invention, and FIG. 9 is FIG. A schematic plan view of the room temperature water pump assembly 3 in the illustrated embodiment, and Fig. 10 is a cross-sectional view taken along line KK of Fig. 9. The normal temperature water pump assembly 3 includes a normal temperature water pump 30 (using a normal temperature water gear pump head 300), a drive shaft 31, a bracket tube 32, a large pulley 33, a small pulley 34, an encoder 35, a photoelectric switch 36, a belt 37, a motor 38, and related Joints and pipes. The two ends of the stainless steel bracket tube 32 are respectively fixed on the bracket plate 15 near the top of the normal temperature water gear pump head 300 and the outer casing 1 by the tight-fitting manner, and the transmission shaft 31 in the tube is also extended correspondingly, and the extension manner can be made by such extension. The gear pump head 300 of the room temperature water pump extends into the interior of the room temperature water container, preferably the bottom. The motor 38 and the drive shaft 31 of the normal temperature water pump are also driven by a pulley. The pulley on the motor 38 (ie, the small pulley 34) and the pulley on the transmission shaft 31 (ie, the large pulley 35) are set in a deceleration manner, and are driven by a belt. The parallel connection of the motor 38 and the drive shaft 31 also makes the structure more compact and space-saving. If the motor and the drive shaft are vertically installed, the height and internal volume of the water dispenser are undoubtedly increased. Similarly, the motor 38 of the normal temperature water pump and the transmission shaft 31 can also adopt other transmission connection methods, such as gear transmission. In addition to the transmission connection mode, the transmission shaft and the motor can be directly connected by the coupling outside the normal temperature water container. . On the small pulley 34 of the motor 38 of the normal temperature water pump An encoder 35 is also mounted, and a photoelectric switch 36 is provided beside the encoder 35 for detecting the rotational speed of the motor 38 and the circling speed of the rotation, thereby accurately outputting the normal temperature water at a constant speed. Reference numeral 39 denotes a normal temperature water pump seat for fixing the normal temperature water pump unit 3 to the holder plate 15.

The water outlet 312 of the normal temperature water pump assembly is directly connected to the normal temperature water inlet 61 of the hot and cold water mixer 6 through a pipe. At this time, the water inlet 311 of the normal temperature water pump assembly is below the normal temperature water gear pump head 300, and the water outlet 312 is at normal temperature. Above the water gear pump head 300, of course, this position setting is not necessary.

In the normal temperature water tank 2, a transfer pump assembly for injecting water into the hot water tank is also required. In the embodiment of the present invention, two implementation manners are included. One is to design the normal temperature water pump assembly 3 as a two-way pump, so that it has the function of a dual pump. In this case, only the normal temperature water container 2 needs to be installed. One pump; the other way is to set up a separate pump for watering the hot water container. Of course, it is also possible to provide a transfer pump assembly for injecting water into the hot water tank outside the normal temperature water tank 2, but this increases the complexity of the structure.

The first mode is shown in FIG. 11-13. FIG. 11 is a schematic structural view of another embodiment of the normal temperature water pump assembly 3 according to the embodiment of the present invention, and FIG. 12 is a normal temperature water gear pump in the embodiment shown in FIG. FIG. 13 is a cross-sectional view of the normal temperature water gear pump head of the embodiment shown in FIG. 12; at this time, the normal temperature water pump assembly 3 is designed as a two-way pump, and the normal temperature water gear pump head 300 includes a first valve 301 and a second end. The valve 302 has two valves, and the two valves respectively include a first valve plug 303 and a second valve plug 304, and the two valve plugs are connected by a bracket 305. Correspondingly, the other end of the normal temperature water gear pump head 300 includes a first water outlet 306 and a second water outlet 307. The two water outlets are offset from the two valves. As shown in FIG. 13, when the gear pump rotates forward, the gear is driven. The flow of water flows from the direction of the first valve 301 to the direction of the second valve 302 (flow from the cavity of the first water outlet 306 to the cavity of the second water outlet 307), at which time, under the action of water pressure, the first valve plug 303 is flushed, and the second valve plug 304 is pressed against the second valve 302 by water pressure, thereby forming a water from the first valve 301 into the water from the second water outlet 307, and the second valve plug 304 is closed; However, when the gear pump is reversed, the gears drive the flow of water from the direction of the second valve 302 to the direction of the first valve 301 (flow from the cavity of the second water outlet 307 to the cavity of the first water outlet 306), at this time, Under the action of the water pressure, the second valve plug 304 is flushed, and the first valve plug 303 is pressed against the first valve 301 by the water pressure, thereby forming water from the second valve 302 and discharging water from the first water outlet 306. The first valve plug 303 is closed. In the embodiment of the present invention, any one of the water outlets may be selected to connect the normal temperature water inlet 61 of the hot and cold water mixer 6, and the other to the water inlet 411 of the hot water tank 4. By designing a room temperature water pump assembly 3 as a two-way pump, both for inputting normal temperature water to the hot and cold water mixer 6, and for injecting water into the hot water container 2, the structure is greatly simplified and the cost is reduced.

The second mode is described below. As shown in Fig. 15-17, the water dispenser is additionally provided with a water pump assembly 8 for pumping water from the normal temperature water container 2 to the hot water container 4. The water pump of the water pump assembly 8 can be installed at The normal temperature water container 2 is installed outside the normal temperature water container 2, and if it is installed inside the normal temperature water container 2, the micro submersible pump is used, and the external centrifugal pump can be installed under the container or the self-suction function is adopted. Pump (eg gear pump, diaphragm pump, The peristaltic pump, etc.) is freely installed in a suitable position. A preferred embodiment of the present embodiment is to use a micro submersible pump to be installed near the bottom of the normal temperature water container. The water inlet of the water pump is close to the bottom of the normal temperature water container, and the use of the micro submersible pump installed inside the container can save space and make the machine compact. Reference numeral 81 shows a water pipe in which the water pump assembly 8 feeds the hot water container.

The above is an embodiment in which water is injected into the hot water tank 4 by the normal temperature water container 2, and two embodiments are described. Of course, it is also possible to use a method of injecting water from the outside to the hot water tank 4, but the volume is increased and the structure is increased. The complexity and cost increase, and the manner in which such a variant is adopted should also fall within the scope of this patent.

The input of water from the outside to the normal temperature water container 2 can also be achieved in two ways, one is to manually add water, and the other is to automatically add water.

The manual watering setting is described below. As shown in FIG. 2-3, the top of the normal temperature water container 2 (ie, the upper annular surface 143) has a circular opening 24, and the corresponding position of the top panel 11 of the water dispenser has a circular shape. The opening is connected between the two openings by a cylindrical water tank 16, and the water tank 16 has a funnel-like function, thereby increasing the water injection port of the normal temperature water container 2 to facilitate manual watering. On the top side of the top panel 11 adjacent to the water injection port, there is a semicircular annular cover plate 111 which can be opened and closed with a diameter to prevent foreign matter from entering the room temperature water container and the appearance is beautiful. One side of the cover plate is fixed to the top by a hinge. On the panel 11.

The settings for automatic watering are described below. In order to allow the water dispenser to automatically fill the water from the outside water source, a self-priming pump or a solenoid valve can be provided according to the type of the external water source. When the external water source is a water-filled container, a self-priming pump can be provided (with self-priming function) The water pump) such as a diaphragm pump or a gear pump, a peristaltic pump, etc., can be set as a solenoid valve when the external water source is a pure water machine, to use the self-priming pump as an embodiment, as shown in Fig. 2 and Fig. 3, the water dispenser The bottom of the bottom is provided with a self-priming pump 17 fixed by a rubber seat. The input port 171 of the self-priming pump 17 is connected to an external water source port 173 fixed to the outer casing through a silicone tube, and the outlet port 172 of the self-priming pump 17 passes through the silicone tube. Connected to a rigid tube 174 which passes through the bottom of the cryogenic water container 2 to the top of the cryogenic water container 2, with a gap in the edge of the tube near the top of the container from which water can flow to In the normal temperature water container 2. Further, a filter 175 is disposed between the input port 171 of the self-priming pump 17 and the external water source port 173 to prevent foreign matter from entering the water dispenser to damage the parts and to ensure the water quality is clean. The above two ways of adding water to the normal temperature water container 2 may be one or a combination of the two.

In the embodiment of the water dispenser, in order to obtain water below normal temperature, as shown in FIGS. 14 and 16, the water outlet 312 of the normal temperature water pump assembly and the normal temperature water inlet 61 of the hot and cold water mixer 6 may be connected to the pipeline of the normal temperature water inlet 61. A refrigerator 7 is connected in series, and the refrigerator 7 is preferably a semiconductor refrigerator. Because of its small size and large cooling temperature difference, the refrigerator is very suitable for the small water dispenser of the present invention. 18-19, FIG. 18 is a front view of the refrigerator, and FIG. 19 is a plan view of the refrigerator. The refrigerator is mainly composed of a semiconductor refrigerating sheet 71, a heat exchanger 72, and a radiator 73, and further includes a fan 74. The chiller is mounted to the bottom of the water dispenser. Taking FIG. 16 as an example, when the refrigerator is installed, the water inlet 311 and the water outlet 312 of the normal temperature water pump assembly 3 are both disposed at the bottom (of course, the positions of the water inlet 311 and the water outlet 312 of the normal temperature water assembly 3 should not affect the present position. The scope of protection of the invention, as shown in Fig. 14, the two

water outlets

306, 307 of the bidirectional pump are disposed at the upper portion), and the water outlet 312 is connected to the input port of the heat exchanger 72 of the refrigerator 7 through the bottom plate of the normal temperature water container 2 through the interface. 721. When the water outlet 312 passes through the bottom plate of the normal temperature water container 2, it needs to be sealed with a silicone sleeve and connected to the input port of the heat exchanger 72 through a silicone tube. The output port 722 of the heat exchanger 72 is connected to the room temperature water inlet 61 of the hot and cold water mixer 6 through a silicone tube (i.e., the heat exchanger output water pipe 723 in Figs. 14 and 16). The semiconductor refrigerating sheet 71 is powered by a direct current, and a driving circuit composed of a MOSFET element controlled by a PWM signal from the controller realizes adjustment of the cooling power. It can be seen that, in the embodiment of the present invention, the fixed temperature hot water can be obtained by mixing the water output from the normal temperature water container and the hot water container, or the cold water can be output from the normal temperature water container through the refrigerator, only two containers are needed, It is necessary to provide three containers of a cold water container, a normal temperature water container and a hot water container, which simplifies the internal structure and makes the water dispenser more compact and miniaturized. Moreover, similar to the above-mentioned non-high temperature insulation scheme, when the user needs to output cold water lower than the water temperature of the normal temperature water container, the power of the refrigerator is adjusted (it is preferred to select the normal temperature water pump to operate at the maximum flow rate, and if necessary, adjust the normal temperature water pump to output the normal temperature water. The flow rate is such that the output normal temperature water is cooled to a specified temperature after passing through the refrigerator, and cold water below normal temperature can be obtained. This refrigeration function of the refrigerator, similar to the secondary heating function of the heating device, also adds an adjustment variable when adjusting the water temperature, which will be further explained below in connection with the temperature control method.

Next, a heating apparatus according to an embodiment of the present invention will be described, and the heating means in the hot water tank 4 can be reheated twice in the process of supplying hot water to the hot and cold water mixer 6. In the embodiment of the present invention, the heating in the hot water container is heated by the heating device before being transported by the hot water pump, and the heating in the hot water container is heated again by the heating device during the conveying process by the hot water pump. For secondary heating. That is to say, the heating device in the hot water tank 4 provides two functions, one is to heat the water in the hot water container to a specified temperature and keep it constant near the temperature, and the other is to heat the output of the insulated water to obtain a specific container. The hot water with high internal heat preservation temperature, for the same insulated container, if the temperature of the water in the container is higher, the more energy is consumed at the temperature, if the water in the hot water container is constant at one Although the low temperature can reduce the energy consumption, it will greatly reduce the scope of use of the water dispenser. When the heater is used to reheat the output water, it can solve the above two problems very well, not only can the water dispenser be used. The output is close to 100 degrees of boiling water and the water in the hot water container can be kept at a lower temperature to save energy and save energy. This is the non-high temperature insulation scheme as described above. Under normal conditions, it is not necessary to maintain the water in the hot water tank 4 at a very high temperature, and it is also possible to immediately output hot water of a sufficiently high temperature, which has a very superior energy saving effect. Further, by setting a reheatable heating device in the hot water tank 4, an adjustment variable is added in the process of obtaining the specified water dispenser outlet temperature, so that it is possible to preferentially obtain hot water at a specified temperature. Ensure that the pump has a large amount of water (the temperature of the heating device is adjusted to adjust the temperature of the hot water output when the pump is operated at the maximum flow rate), which ensures that the water output is large enough to avoid long time for the user to take water and requires a long wait. The above effects of the present invention will be further described when introducing the control method of the water dispenser.

The heating device can be used as follows:

In the first mode, as shown in FIG. 3 and FIG. 20 to FIG. 23, the heating device includes only one heating unit 44, and the heating device is installed. The water pump assembly 5 is integrally installed with the water pipe of the hot and cold water mixer, and the heating device can heat the water of the hot water container 4 and mix the hot water in the water pipe to the hot and cold water. It is heated twice during the conveying process. 20 is a cross-sectional structural view of a heating device used in an embodiment of the present invention, FIG. 21 is a partial enlarged view of a region I in FIG. 20, and FIG. 22 is a partial enlarged view of FIG. In the embodiment, a vertical cross-sectional view of the heating device, and Fig. 23 is a cross-sectional view in the NN direction of Fig. 22. The heating unit 44 includes a heat pipe 441, a metal pipe 442 and a joint at both ends. The metal pipe 442 is preferably an aluminum alloy material, the inner wall of the metal pipe 442 is provided with a groove 443, and the heat pipe 441 is concentrically mounted with the metal pipe 442, and the metal pipe 442 is The diameter of the inner wall is equal to the outer diameter of the heat pipe 441, and the inner wall of the metal pipe 442 is closely attached to the outer wall of the heat pipe 441. Thus, the groove of the inner wall of the metal pipe 442 forms a water delivery pipe for supplying hot water to the hot and cold water mixer 6, and since the heat pipe 441 is in close contact with the inner wall of the metal pipe 442, the heat of the heat pipe 441 can pass through the metal pipe 442. When the water in the hot water tank 2 is heated and water passes through the groove 443 of the metal pipe 442, it can be heated again. The bottom end of the metal pipe 442 has an interface 4422 for water input (i.e., connected to the output port of the hot water pump), and the top end of the metal pipe 442 is connected to the hot water inlet of the hot and cold water mixer 6 through a pipe. Preferably, the top end of the metal tube 442 has a connecting tube 444 with an open side. The metal tube 442 is fixed to the inner tube of the connecting tube 444 by a tightly inserted manner, and is fixed to the connecting tube 444. The outer cylindrical surface of the connecting tube 444 With the thread, the heat pipe 441 and the metal pipe 442 are integrally fixed to the stopper 43 by this thread. The side of the joint between the connecting pipe 444 and the metal pipe 442 has an opening 4441. The pipe wall at the top end of the metal pipe 442 is also provided with a slot 4421 corresponding to the opening 4441. The slot 4421 of the metal pipe 442 and the connecting pipe 444 are connected. The opening 4441 forms a water outlet of the hot water delivery pipe leading to the hot water inlet 62 of the hot and cold water mixer 6 through the water passage of the stopper. The wire 4411 of the heat pipe 441 is taken out through the end of the connection pipe 444. The water outlet of the metal pipe 442 is disposed on the side wall of the metal pipe to effectively isolate the heat pipe wire 4411 located at the top of the metal pipe 442 to avoid a safety hazard. Using the above heating device, the temperature of the water in the hot water tank can be kept constant at 85 degrees according to the general use condition, assuming that the output water is heated to 95 degrees and the temperature difference is 10 degrees, assuming that the flow rate of the water is set to 600 ml per minute. By calculating the required heating power at this time is 420 watts (according to the formula of specific heat capacity Q=cmΔT, the specific heat capacity of water is 4.2 J/(g·°C), and 600 ml of water is heated from 85 degrees Celsius to 95 degrees Celsius, which needs to be absorbed. The heat is Q=4.2*600*10J, then the heating power is P=Q/t=4.2*600*10/60=420 watts. According to the groove shape structure of the metal pipe 442, the heater outputs water. The heating efficiency is also different, since the tube wall of the metal tube 442 transfers heat from the heat pipe 441 (ie, through the metal portion between the adjacent grooves 443) for heating the water of the hot water container, When the hot water is output from the water flow channel formed by the groove 443, the heating power of the heat pipe 441 is not completely used for secondary heating of the water in the groove 443. When the hot water flows through the groove 443 in this embodiment, The heat pipe 441 is used for secondary heating of hot water with an efficiency of 60%. Left and right, then, at this time, the heating power of the hot water in the groove needs 420 watts, then the power of the heating tube needs 700 watts, so that the maximum power of the whole machine can be controlled within 800 watts, such power does not constitute pressure on the distribution circuit. . It can be seen that, in the above manner, the water in the hot water tank 4 usually needs to be kept at a small level. When necessary, the water flowing through the heat pipe 441 is reheated to obtain the required water. The hot water temperature has achieved good energy saving effect and is environmentally friendly.

In the second mode, the heating device includes two heating units, a conventional heater and a secondary heater. The conventional heater can be a conventional heating tube, such as a common straight electric heating tube, a U-shaped electric heating tube, an L-shaped electric heating tube or the like. A conventional heater, as shown in Figs. 24, 25, and Fig. 24 is a cross-sectional structural view of a heating device used in another embodiment of the present invention, wherein the heating device includes a conventional heating pipe 440 and a secondary heater 45, and Fig. 25 is a view In the embodiment shown in Fig. 24, a cross-sectional view of the secondary heater 45; wherein reference numeral 440 denotes a conventional heating tube. The secondary heater adopts a unique structure of the present invention, and includes a second metal pipe 452, a second heat pipe 451 disposed in the second metal pipe 452 and concentrically mounted with the second metal pipe 452, and an outer wall of the second heat pipe 451 The inner wall of the second metal pipe 452 is spaced apart to form an annular water flow passage 453, and the bottom end of the second metal pipe 452 is connected to the outlet of the hot water pump through a pipe, and the structure of the top end of the second metal pipe 452 is the same as that of FIGS. 20 to 23. In the same embodiment, the slot provided through the side wall of the second metal pipe 452 and the opening on the side of the connecting pipe are connected to the hot water inlet 62 of the hot and cold water hot water mixer 6 through a pipe, and the wire of the second heat pipe 451 is also It is taken out from the end of the connecting tube. In this manner, the second heat pipe 451 can reheat the hot water passing through the annular water flow passage 453 with high efficiency. In the first mode, since the heat of the heat pipe 441 is diffused from the metal pipe 442 to the hot water container, only part of the efficiency is used for secondary heating of the hot water flowing through the groove 443, and the present scheme is adopted. Then, the second heat pipe 451 can be used for secondary heating of the flowing hot water with an efficiency close to 100%, and the heating efficiency is high. Using the above heating device, the temperature of the water in the hot water tank can be kept constant at 85 degrees according to the general use condition, assuming that the output water is heated to 95 degrees and the temperature difference is 10 degrees, assuming that the flow rate of the water is set to 600 ml per minute. By calculating the required heating power at this time at 420 watts, at this time, the heating power of the secondary heat pipe 451 is set to 420 watts, that is, all of the water for heating in the annular water flow path 453 can be heated. A conventional heater disposed in the hot water tank 4 is used to heat the water in the hot water tank to a specified temperature and to be constant at a certain temperature. Of course, in the second mode, as a modification, the secondary heater can still adopt the heating unit 44 of the first mode, except that the heating efficiency of the secondary heating is low, but the heating unit 44 is combined with the conventional heating. When the tube 440 is used, the water in the hot water container is heated more efficiently.

In the embodiment of the present invention, a liquid level detecting device is disposed in the hot water container, and the second liquid level detecting device 42 in the hot water container is configured to detect the level of the hot water level to control the water pump for adding water to the hot water container. As a more preferred embodiment, the normal temperature water container may also be provided with a liquid level detecting device, hereinafter referred to as a first liquid level detecting device 22, and the first liquid level detecting device 22 in the normal temperature water container is used to realize the warm water capacity. Display and realize the automatic water adding function. Of course, since the amount of water in the normal temperature water container can be viewed in real time and the normal temperature water container also has a drain hole, the liquid level detecting device in the normal temperature water container is only a better solution. Not a must. In the technical solution of the present invention, the existing floating ball method, the sinking method, the water level method, or the like can be used, but a preferred solution is to use a liquid level sensor, and the liquid level sensor originally created by the present invention is used for the liquid. Bit detection.

26, 27, and 28, Fig. 26 is a schematic structural view of a liquid level detecting device in the embodiment of the present invention, and Fig. 27 is a side view of Fig. 26. The liquid level sensor 200 is a resistive liquid level sensor capable of detecting multiple points, specifically a long strip circuit board 201 with a liquid level detecting circuit, and the liquid level detecting circuit in the liquid level detecting sensor includes One by N a resistor circuit composed of a series of resistors, one end of the resistor circuit is connected to the ground terminal, and the other end is a liquid level voltage output terminal; wherein N is a positive integer; the liquid level detecting circuit is further provided with N transistors, each a collector of the transistor is respectively connected to a series node of each resistor of the resistor circuit; an emitter of each of the transistors is connected to a ground terminal; and a base of each of the transistors is respectively connected to a detecting electrode; Each detection electrode corresponds to one detection point. The liquid level detecting circuit is further provided with a voltage dividing resistor, one end of the voltage dividing resistor is connected to the liquid level voltage output end, and the other end is connected to the first power supply terminal; the first power supply terminal is opposite The liquid level detecting circuit supplies power. The first power supply terminal may be electrically connected to the detecting electrode through a liquid.

Further, the output voltage of the level voltage output terminal Level is proportional to the resistance value in the resistance circuit, and the resistance value R _{m of} the resistor of the mth series node of the resistance circuit and the resistance of the voltage dividing resistor The value R ₀ has an association:

Where m is a positive integer and 1≤m≤N-1,

The sum of the resistance values of the first resistor to the mth resistor from top to bottom of the liquid level detecting circuit. Moreover, when m=N, the resistance value R _{N of the Nth} resistor is a custom resistance value R _r , or the Nth resistor is removed in the resistance circuit, so that R _N is infinite value. 28 is a circuit schematic diagram of a liquid level detecting device according to an embodiment of the present invention. In FIG. 28(a), the resistance value R _{N of the Nth} resistor is set to a custom resistance value R _r ; In (b), the Nth resistor is removed in the resistor circuit such that R _N is an infinite value. As shown in FIG. 28(b), after the Nth resistor is removed in the resistor circuit, the collector of the Nth transistor is connected to one end of the N-1th resistor, and the other of the N-1th resistor One end is connected to the collector of the N-1th transistor, so that R _N is the same as an infinite value.

In particular, each resistance of the resistor circuit are arranged from top to bottom, the parameter m is also positioned below the level of the current detection electrode and the nearest P _m and the resistance circuit is connected to reference node, _n is the n R & lt resistance in the circuit Resistors (excluding voltage divider resistor R0), parameter N is also the total number of series nodes. The formula (1) is designed such that when the liquid level is located at a different detecting electrode P _m , the output voltage value of the liquid level voltage output terminal Level is m/N times the power supply voltage of the first power supply terminal Vcc1. For example, when the liquid surface just does not pass the second detecting electrode P ₂ , the output voltage value of the liquid surface voltage output terminal Level is (2/N)*Vcc1.

Specifically, the resistance value of the mth resistor in the resistance circuit is:

Wherein m is a positive integer, and 1≤m≤N, where N is the number of resistors in the resistor circuit; and, when m=N, the resistance value R _{N of the Nth} resistor is a self The resistance value R _{r is} defined, or the Nth resistor is removed in the resistor circuit to achieve the resistance value R _N as an infinite value, as shown in FIG. 2 .

In this embodiment, the higher the value of the constant resistance value R _{r is} , the higher the sensitivity of the liquid level detection of the bottom detecting point of the circuit board is. Therefore, on the one hand, the resistance value R _r can be set by a custom. _Therefore , the value of the resistance value R _r is sufficiently large (the larger the value of the constant resistance value R _{r is} , the better), and specifically, it is preferable to use the resistance value R _N-1 of the N-1th resistor of 10 times or more, that is, R _r ≥ 10R _N-1 ; on the other hand, by simplifying the structural composition of the resistor circuit, that is, removing the Nth resistor, the Nth series node in the resistor circuit is connected only to the collector of the Nth transistor, The resistance value R _N in the entire liquid level detecting circuit is equivalent to an infinite value (+∞), and at this time, the liquid level detecting circuit can obtain an excellent liquid level detecting effect.

As further illustrated in the following with reference to the figure, as shown in FIG. 28(a), when the parameter N=6, that is, the resistance circuit is composed of six resistors in series, the multi-point liquid level detecting circuit is also correspondingly provided. Six transistors and six detecting electrodes connected in one-to-one correspondence with the base of the transistor. Specifically, the resistor circuit is sequentially connected in series by the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4, the fifth resistor R5, and the sixth resistor _RN (N=6). The base of the first transistor Q1 is connected to the first detecting electrode P1, the collector of the first transistor Q1 is connected to the level voltage output terminal Level of the resistor circuit, and the emitter thereof is connected to the ground terminal GND; the base of the second transistor Q2 is The second detecting electrode P2 is connected, and its collector is connected to the series node of the first resistor R1 and the second resistor R2, and its emitter is connected to the ground terminal GND; the third transistor Q3 to the sixth transistor P _N (N= 6) is connected in the same manner as the second transistor Q2. The liquid level detecting circuit is further provided with a voltage dividing resistor R0. One end of the voltage dividing resistor R0 is connected to the liquid level voltage output end Level, and the other end is connected to the first power supply terminal Vcc1.

In particular, since the Nth resistor R _m , that is, R _N , is assigned according to the formula (a) in the formula (2), the denominator value (N-m+1) (Nm) will be zero. The value, that is, the calculated value of equation (a) will be an infinite value (+∞), where R _N will be an infinite value, and the connection node between the N-1th resistor and the Nth resistor can be disconnected. R _N can be achieved as an infinite value, as shown in Figure 28(b). In order to facilitate the application of the liquid level detecting circuit, R _N can be assigned, that is, a constant resistance value R _r is taken such that R _r =R _N , as shown in Fig. 28(a).

For example, when N is 6 and the voltage dividing resistor R _{0 is} preset to 10KΩ (kilo ohms), the resistance value of the first resistor R1 can be calculated according to the equation (2), R1=2KΩ, The resistance value of the two resistor R2 is R2=3KΩ, the resistance value of the third resistor R3 is R3=5KΩ, the resistance value of the fourth resistor R4 is R4=10KΩ, and the resistance value of the fifth resistor R5 is R5=30KΩ. The resistance value of the sixth resistor R6 is R6 = R _r = 10 MΩ (1 MΩ = 10 ³ KΩ). Through the above design values, when the liquid level is located at the corresponding detecting electrode Pm (1≤m≤N), the output voltage value of the level voltage output terminal Level is approximately equal to 0, 1/6Vcc1, 2/6Vcc1, 3/6Vcc1, 4/6Vcc1, 5/6Vcc1, when the liquid level is lower than the lowest detection point (sixth detection electrode P6), the output voltage of the level voltage output terminal Level is approximately equal to Vcc1.

Since each of the detecting electrodes is usually immersed in the liquid of the liquid to be tested, if the detecting electrode receives the long length of the first power supply terminal When the power is supplied, the electrode of the detecting electrode is electrolyzed, the metal ions are released to the liquid, the composition of the liquid is changed, and the service life of the detecting electrode is affected. Therefore, preferably, the first power supply terminal performs timing power supply to the liquid level detecting circuit, and specifically, power supply is only performed for a short time (e.g., several milliseconds) each time liquid level detection is performed.

Further, the liquid level detecting circuit seals all circuits except the detecting electrode, the first power supply terminal and the liquid level voltage output end with an insulating material. Since the liquid level detecting sensor needs to be immersed in the middle, if the insulation measures are not taken, the liquid level detecting sensor may cause a circuit failure and may not work normally. Preferably, the liquid level detecting sensor can be integrally applied with silica gel water to form an insulating coating layer.

Preferably, the detecting electrode is a probe composed of a corrosion-resistant conductive material or a conductive terminal with a gold-plated surface. When the detecting electrode is made of a corrosion-resistant conductive material, the corrosion-resistant conductive material is preferably made of titanium and graphite, which can effectively prevent electrode electrolysis caused by energization and prolong the service life of the detecting electrode.

Preferably, each of the detecting electrodes P _{N is} evenly distributed on the circuit board from top to bottom; the distance between each adjacent detecting electrodes is equal. Specifically, the detection electrode P _N number N may be set according to actual needs.

The liquid level voltage output terminal Level, the first power supply terminal Vcc1, and the ground terminal GND are disposed on the top portion 202 of the circuit board (all of the above three terminals are not shown in FIG. 27).

Further, a bottom portion and/or a middle portion of the circuit board is further provided with a common electrode that is not sealed by the insulating material; the common electrode is connected to the first power supply terminal Vcc1 through a wire; the common electrode can pass The liquid is electrically connected to the detecting electrode P _n (n=1, 2, . . . , N).

In a specific implementation, since the detecting electrode P _n of the liquid level detecting circuit is connected to the first power supply terminal Vcc1 by the liquid as the transmission medium, and the respective detecting electrodes P _{n are} evenly distributed along the circuit board 200 from top to bottom, The liquid level detecting circuit has a detection range (for example, 200 mm), that is, when the detecting electrode _Pn is far from the first power supply terminal Vcc1, some transistors may not be turned on. Therefore, the present invention further provides one or more common electrodes T _x (x=1, 2, . . . ) that are connected to the first power supply terminal Vcc1 to be turned on, so that the detecting electrodes P in the liquid level detecting circuit _n may be connected by a common electrode T _x and the first power supply terminal Vcc1, thereby ensuring respective transistors Qn (n = 1,2, ......, N) to work properly. According to the depth of the hot water container of the water dispenser and the temperature of the normal temperature water container, when N=6, since the electronic components of the liquid level detecting circuit can be compactly arranged on a narrow strip-shaped circuit board, A common electrode is disposed at the bottom and the middle of the circuit board 201. Specifically, as shown in FIG. 26, a first common electrode T1 may be disposed at the bottom of the liquid level detecting circuit, that is, at the bottom of the circuit board 201, and a second common electrode T2 may be disposed in the middle of the liquid level detecting circuit, that is, in the middle of the circuit board 201. The number x of the common electrode T _x should be changed correspondingly depending on the size of the detection range of the liquid level detecting sensor.

In the liquid level detecting sensor provided in this embodiment, the basic working principle of the liquid level detecting circuit is: when a certain detecting electrode is submerged under the liquid surface, the first power supply terminal passes the liquid due to the conductivity of the liquid. Conductively connected to the detecting electrode, so that the first power supply terminal and the detecting electrode are connected by a resistor, so that the transistor connected to the detecting electrode is turned on, that is, the collector and the emitting of the transistor Pole conduction connection The corresponding series node of the road leads to the grounding end, and shorts the other resistors located below the liquid surface, thereby changing the resistance value of the resistance circuit; and the change of the resistance value of the resistance circuit will cause the power supply voltage of the first power supply terminal to output The partial pressure on the resistor circuit changes. Therefore, by using the relationship between the resistance value of the resistor circuit, the output voltage value of the liquid level detection output terminal, and the liquid level height, the voltage of the liquid level voltage output terminal of the resistor circuit is collected. The value calculates the height of the liquid level.

Referring to Fig. 29, it is a circuit schematic diagram of the liquid level detecting circuit of the liquid level sensor as a function of the liquid level.

Specifically, as shown in FIG. 29, when the liquid is immersed in the first detecting electrode P1 (since the detecting electrodes Pn are arranged from top to bottom, other detecting electrodes are also located below the liquid surface), each detecting electrode passes through the liquid and the common electrode. When T1 or T2 is connected, when the first power supply terminal Vcc1 supplies power to the common electrode, all the transistors Qn in the liquid level detecting circuit can be turned on, but since the first transistor Q1 is turned on, it is equivalent to connecting its collector and the emitter. After grounding, as shown in a of FIG. 29, the first resistor R1 to the Nth resistor R _{N are} short-circuited, so that the voltage difference between the level voltage output terminal Level and the first detecting electrode P1 is zero; As shown by b in FIG. 29, when the liquid is immersed in the second detecting electrode P2, the second detecting electrode P2 to the Nth detecting electrode P _{N are} electrically connected to the first power supply terminal Vcc1, so that the second transistor Q2 to the Nth transistor Q _N Turning on, however, since the second transistor Q2 is turned on, it is grounded after the collector and the emitter are connected, thereby short-circuiting the second resistor R2 to the Nth resistor R _N , so the liquid level voltage output terminal Level and Electricity between the second detecting electrodes P2 Difference voltage across the first resistor Rl; and so on.

In a specific implementation, the corresponding relationship between the output voltage of each detecting electrode and the liquid level at the position of the detecting electrode needs to be designed, so that the position of the detecting electrode can be calculated according to the detected output voltage of the Level end, that is, the current position of the liquid surface is obtained. .

And R & lt resistance value R1 of _m to m-th node of the series (1) a first resistor to said level detecting circuit top-down resistor. Specifically, the parameter m is also a connection node number of the detection electrode P _m and the resistance circuit located below the current liquid level and the closest distance, Rn is the nth resistor in the resistance circuit (excluding the voltage dividing resistor R0), the parameter N is also the total number of series nodes. The formula (1) is designed such that when the liquid level is located at a different detecting electrode Pm, the output voltage value of the liquid level voltage output terminal Level is m/N times the power supply voltage of the first power supply terminal Vcc1. For example, when the liquid surface just does not pass the second detecting electrode P2, the output voltage value of the liquid level voltage output terminal Level is (2/N)*Vcc1. (2) The above liquid level detecting sensor utilizes the physical characteristics of the transistor and the flexible design of the resistor circuit, so that when the liquid level is at a position of different detecting electrodes, the liquid level voltage output end outputs different voltage values, thereby being The specific output voltage value is used to know the current liquid level position. The technical scheme is flexible in design, and multiple detection electrodes can be designed according to requirements to improve detection accuracy. The ingenious design realizes liquid level detection for multiple detection points, and the cost is low, and the liquid level detection circuit The utility model has the advantages of simple structure, small footprint of the circuit board and convenient installation, and further facilitates the installation of the temperature sensor in the normal temperature water container and the hot water container of the invention, which is very suitable for the implementation of small appliances, especially the water dispenser of the invention. Example application. The liquid level sensor 200 used for the room temperature water container and the hot water container in the embodiment of the present invention may be a double-sided copper clad laminate having a width of 5 mm, a length of 200 mm, and a thickness of 1 mm, although other sizes may be employed.

Further, a temperature sensor 203 for detecting the temperature of the liquid is further provided at the bottom of the circuit board of the liquid level sensor 200, that is, the temperature sensor 21 of the normal temperature water container and the temperature sensor 41 of the hot water container are installed in the respective internal liquid level sensors. The bottom end, correspondingly, the circuit board 201 further includes a liquid temperature output terminal Temp for receiving and outputting the monitoring data of the temperature sensor 203; and a second power supply terminal Vcc2 for supplying power to the temperature sensor 203. The liquid temperature output terminal Temp and the second power supply terminal Vcc2 are not shown in the drawing.

Since the temperature sensor 203 is used for detecting the temperature of the liquid in real time (that is, detecting the temperature of the normal temperature water container and the hot water container in real time), the second power supply terminal Vcc2 for supplying power for a long period of time can be added, thereby being used for the liquid The first power supply terminal Vcc1 for supplying power by the bit detecting circuit is distinguished from the second power supply terminal Vcc2 to avoid long-term power supply to the liquid level detecting circuit to cause electrolysis of the detecting electrode.

In a specific implementation, the temperature sensor 203 can use a digital or analog sensor. among them. The analog temperature sensor includes a thermistor, a platinum resistor, and a semiconductor temperature sensor. The temperature signal is transmitted by analog-to-digital conversion through a corresponding signal conditioning circuit; the digital temperature sensor is a digital temperature sensor that directly outputs a temperature value, such as a model number. For the DS18B20, LM75 and other devices. This embodiment is preferably a digital temperature sensor DS18B20, which uses a single-bus digital interface, has a simple hardware connection, and has a maximum error of ±1.5 degrees in a temperature range of 0 to 100 degrees, which can satisfactorily satisfy the water dispenser. Technical requirements.

Further, in this embodiment, the liquid level voltage output terminal Level, the liquid temperature output terminal Temp, the first power supply terminal Vcc1, the second power supply terminal Vcc2 or the ground terminal GND are inserted The connector or wire is soldered to the external host computer so that the external host computer can receive the data output by the sensor and analyze the data.

Preferably, the output voltages of the first power supply terminal Vcc1 and the second power supply terminal Vcc2 are both 5 volts. The power supply of the above two power supply terminals uses a voltage of 5V (volts), which enables the liquid level detection circuit to work stably, and the voltage of 5V can be compatible with most single-chip microcomputer systems, and the application is more convenient.

In the embodiment of the present invention, the outer casing is generally mounted on the base 10. The water outlet 101 of the water dispenser is provided with a cup detecting switch 102 for detecting whether there is a cup under the water outlet 101. As shown in FIG. 2, the cup detecting switch 102 can prevent the water. The water is erroneously discharged, and the water can be discharged from the cup, and the water is stopped when the cup is left. It is convenient to use and can perform the operation of the random water amount. The cup detecting switch 102 can adopt a switch such as an infrared switch or a mechanical switch. Referring to Figures 14, 16, the controller 9 is mounted to the top panel 11, the top panel 11 having a circular opening in the center, and the panel of the controller 9 is also a circular opening just enough to fit into the circular opening of the top panel 11. As shown in FIG. 30, the controller 9 is mainly composed of a circuit board, a display 91, and a control input module. The display 91 may be a liquid crystal display, an LED display, or a fluorescent tube display. In this embodiment, a dot matrix liquid crystal display is used as a preferred solution. With a dot matrix liquid crystal display as a display device, not only can display detailed information such as the temperature of water in each container, but also the amount of water can be in the form of images, menus, etc. Provide more human-computer interaction. The control input module is a jog dial knob and a push button switch composed of a rotary encoder, or all of the button switches, or an input device composed of a touch screen. In the embodiment, the combination of the shuttle knob 92 and the two key switches is a preferred embodiment. The forward and reverse directions of the jog dial 92 can realize the increase or decrease of the setting parameters, or the switching of menu items, and the like. The two buttons are a determination button 93 and a cancel/return button 94, respectively. Taking the most core quantitative constant temperature water output operation as an example, the initial state of the screen displays the temperature value and the water volume value set by the last water outlet, and the jog dial knob 92 is rotated, and the temperature value is a step value of 1 or 0.5 degrees (this value can be passed Set the option to customize) to increase or decrease, press the OK button 93 after reaching the set value, rotate the jog dial knob 92, the water value is in 1ml or 10ml or 50ml step value (this value can be customized by setting options) The increase or decrease is performed. After the set value is reached, the OK button 93 is pressed to start the water discharge. The water amount may be set by pressing the OK button 93 to start the water discharge when the water amount value is set, and the release determination button 93 stops the water discharge.

The controller 9 is provided with a sensor 95 for detecting the approach of the palm. The sensor may be a pyroelectric infrared sensor or an infrared radiation type sensor. In this embodiment, an infrared reflection type sensor is preferably used. The infrared signal emitted by the infrared emission tube passes through the 38 KHz. Modulation to achieve anti-interference, the detection distance is set to about 10 cm from the controller. This sensor can automatically wake up the microprocessor in the controller when the palm is close to the controller. When the controller wakes up, it will light up the display 91 and start peripheral hardware peripherals. When the machine does not operate for a certain period of time, The microprocessor turns off the display to go to sleep for the purpose of reducing power consumption and extending device life.

The driving circuit of the heating tube adopts the optocoupler to drive the thyristor. The optocoupler used is MOC3061. This optocoupler is a special thyristor driver chip with zero-crossing detection. The controller 9 only needs to output PWM. Controlling the power of the heating tube makes the circuit simple and reliable.

The drive circuit of the normal temperature water pump assembly 3, the hot water pump assembly 5, and the refrigerator 7 is a water pump that is controlled by a PWM signal from the controller 9 using a MOSFET as a switching element to add water to the hot water tank 4 (when the transfer pump assembly 8 is used alone) And a water pump (self-priming pump 17) or a solenoid valve that supplies water to the normal temperature water container 2, and a MOSFET as a switching element is controlled by a switching signal.

The controller uses 12V DC power supply, the power supply is a switching power supply, and the switching power supply has the advantages of small size, high efficiency, wide voltage range and the like.

The following is a specific embodiment of a method for controlling the output water of a water dispenser according to the present invention:

The control method can be used for the control of the output water of the above-mentioned water dispenser embodiment, and the applied water dispenser embodiment should have a refrigerator capable of cooling the normal temperature water of the normal temperature water container in the water discharge process, and the heating device can be used for the hot water container. The hot water is heated twice in the effluent process.

The control method includes:

Step S1: When the water dispenser is working, the controller detects the temperature TL of the normal temperature water in real time through the temperature sensor of the normal temperature water container, and detects the temperature TH of the hot water in real time according to the temperature sensor of the hot water container;

Step S2: The controller determines the relationship between the selected water temperature TS and the water temperature TH of the hot water container and the water temperature TL of the normal temperature water container according to the water temperature TS selected by the user, and controls according to the relationship between the TS and the TH and the TL. The heating power PH, and/or the regulating refrigerator, respectively, by adjusting the hot water pump working flow FH in the hot water tank, and/or adjusting the heating device in the hot water container to heat the hot water in the hot water container during the water discharging process The cooling power PC for cooling the water in the normal temperature water container during the water discharge process, and/or adjusting the working flow rate FL of the normal temperature water pump in the normal temperature water container to obtain the target water temperature TS.

It should be noted that, as the application of the water dispenser, the general water intake temperature is in the range of 0 ° C to 100 ° C. Therefore, the controller determines the selected water temperature TS and the water temperature TH of the hot water container and the water temperature TL of the normal temperature water container. The relationship between the two, also need to check whether the selected target water temperature is in the range of 0 ° C to 100 ° C.

Further, the step S2 is specifically: when the controller determines that the temperature selected by the user is greater than the water temperature of the hot water container, that is, TS>TH, the controller controls the normal temperature water pump not to work, the refrigerator does not work; and the controller further determines And controlling the hot water pump working flow FH and adjusting the power PH of the heating device according to the relationship between PHmax and FHmax×4.2×(TS-TH), wherein the PHmax and FHmax respectively refer to heating output provided by the heating device. The maximum power of hot water and the maximum flow of hot water pumps, including:

When PHmax>FHmax×4.2×(TS-TH), the controller controls the hot water pump working flow FH to be the maximum flow rate FHmax, and adjusts the power PH of the heating device so that PH=FHmax×4.2×(TS-TH);

When PHmax=FHmax×4.2×(TS-TH), the controller controls the hot water pump working flow FH to be the maximum flow rate FHmax, and adjusts the power PH of the heating device to the maximum power PHmax;

When PHmax < FHmax × 4.2 × (TS - TH), the controller adjusts the power PH of the heating device to the maximum power PHmax while adjusting the hot water pump working flow FH such that FH = PHmax ÷ (4.2 × (TS - TH)).

Further, the step S2 is specifically: when the controller determines that the temperature selected by the user is equal to the water temperature of the hot water container, that is, TS=TH, the controller controls the normal temperature water pump not to work, the refrigerator does not work, and the heating device does not work, And adjust the hot water pump working flow FH to the maximum flow rate FHmax.

Further, the step S2 is specifically: when the controller determines that the temperature selected by the user is greater than the water temperature of the normal temperature water container and is smaller than the water temperature of the hot water container, that is, TH>TS>TL, the controller controls the heating device not to work, the refrigerator Does not work; and the controller further determines and controls the hot water pump working flow FH and the normal temperature water pump working flow FL according to the relationship between TS and (TH-TL) / 2+ TL, including:

When TS>(TH-TL)/2+TL, the controller controls the hot water pump working flow FH to be the maximum flow rate FHmax, and adjusts the normal temperature pump working flow rate FL so that FL=(TH-TS)×FHmax÷(TS-TL );

When TS=(TH-TL)/2+TL, the controller controls the hot water pump working flow FH=normal temperature water pump working flow FL;

When TS<(TH-TL)/2+TL, the controller controls the normal temperature pump working flow FL to be the maximum flow rate FLmax, and adjusts the working flow FH of the hot water pump so that FH=(TS-TL)×FLmax÷(TH- TS).

Further, the step S2 is specifically: when the controller determines that the temperature selected by the user is equal to the water temperature of the normal temperature water container, That is, when TS=TL, the controller controls the heating device to not work, the refrigerator does not work, the hot water pump does not work, and adjusts the working flow rate FL of the normal temperature water pump to the maximum flow rate FLmax.

Further, the step S2 is specifically: when the controller determines that the temperature selected by the user is lower than the water temperature of the normal temperature water container, that is, TS<TL, the controller controls the hot water pump not to work, the heating device does not work, and the controller further determines And according to the relationship between PCmax and FLmax×4.2×(TL-TS), the normal temperature water pump working flow rate FL and the regulating power of the refrigerator PC are controlled, wherein the PCmax is the maximum power of the refrigerator, including:

When PCmax>FLmax×4.2×(TL-TS), the controller controls the normal temperature water pump working flow rate FL to be the maximum flow rate FLmax, and adjusts the power PC of the refrigerator so that PC=FLmax×4.2×(TL-TS);

When PCmax=FLmax×4.2×(TL-TS), the controller controls the normal temperature water pump working flow rate FL to be the maximum flow rate FLmax, and adjusts the power of the refrigerator PC to the maximum power PCmax;

When PCmax<FLmax×4.2×(TL-TS), the controller controls the power PC of the refrigerator to be the maximum power PCmax, that is, makes PC=PCmax, and adjusts the normal temperature pump working flow FL so that FL=PCmax÷(4.2×( TL-TS)).

In order to explain the above control method more clearly, the following will be divided into seven situations. The controller is introduced to make different adjustments to the control parameters according to different situations, and the meanings of the letters in each formula are uniformly described as follows:

In the meaning of the letters in the following formula, the unit of flow is in milliliters per second, the unit of power is watts, the time unit is seconds, and the temperature is in degrees Celsius.

The temperature selected by the TS user (ie the target temperature)

TH water temperature of hot water container

TL water temperature of normal temperature water container

FH hot water pump working flow

FL normal temperature water pump working flow

Maximum flow rate of FHmax hot water pump

Maximum flow rate of FLmax normal temperature water pump

The heating power that the PH heating device can provide to heat the output hot water

Refrigeration power of PC refrigerator

The maximum power that the PHmax heating unit can provide to heat the output hot water

Maximum cooling power of PCmax cooler

The PHmax needs to be explained as follows: PHmax refers to the maximum power that the heating device can provide for heating the output hot water, rather than the maximum operating power of the heating device itself, such as the heating unit 44 described above, by designing the dimensions of the metal tube 442. If the heating efficiency of the heating pipe 441 of the heating unit 44 to the secondary heating during the hot water discharge is 60%, then when PH=PHmax, the operating power of the heating pipe 441 of the heating unit 44 should be PHmax/60%; If the secondary heater 45 is employed, the heating power of the second heating pipe 451 of the secondary heater 45 is almost entirely used in the hot water discharge process. When secondary heating is performed, then when PH=PHmax, the second heating pipe 451 can be directly operated at a power of PHmax.

Each situation includes the following:

1. When TS>TH, that is, when the temperature selected by the user is greater than the water temperature of the hot water container, the controller performs the following adjustment control:

The normal temperature water pump does not work, that is, makes FL=0;

The refrigerator does not work, that is, makes PC=0;

And the controller further determines and controls the hot water pump according to the relationship between PHmax and FHmax×4.2×(TS-TH)

The working flow FH and the power PH of the heating device, including:

1) When PHmax>FHmax×4.2×(TS-TH), when the hot water output flow is maximum and the power of the heating device is still large enough

The controller adjusts the hot water pump working flow FH to the maximum flow rate FHmax, that is, makes FH=FHmax;

At the same time, the controller adjusts the power PH of the heating device such that PH = FHmax × 4.2 × (TS-TH);

2) When PHmax=FHmax×4.2×(TS-TH), when the output flow rate of the hot water pump is the maximum, and the power of the heating device is equal to the power required to be heated,

At the same time, the controller adjusts the power PH of the heating device to the maximum power PHmax, that is, makes PH=PHmax;

3) When PHmax < FHmax × 4.2 × (TS-TH), when the output flow rate of the hot water pump is maximum and the power of the heating device is insufficient

The controller adjusts the power PH of the heating device to a maximum power PHmax, that is, makes PH=PHmax;

At the same time, the controller adjusts the hot water pump working flow FH such that FH = PHmax ÷ (4.2 × (TS-TH)).

It is necessary to explain the relationship between PHmax and FHmax×4.2×(TS-TH). According to the formula of specific heat capacity Q=cmΔT, the specific heat capacity of water is 4.2 J/(g·°C), then the water is heated by TH temperature. To the TS temperature, according to the first case, in the case of the maximum flow rate FHmax of the hot water pump, the required heat is Q=4.2×FHmax×t×(TS-TH), where t is time, then the required heating The power is PH = Q / t = 4.2 × FHmax × (TS - TH). Accordingly, according to the third aspect, it is necessary to adjust the working flow rate of the hot water pump according to the maximum heating power of the heating device, that is, FH = PHmax ÷ (4.2 × (TS - TH)).

2. When TS=TH, that is, when the temperature selected by the user is greater than the water temperature of the hot water container, the controller performs the following adjustment control:

The normal temperature water pump does not work, that is, makes FL=0;

The refrigerator does not work, that is, makes PC=0;

The heating device does not work, that is, makes PH=0;

The controller adjusts the hot water pump working flow FH to the maximum flow rate FHmax to obtain the target water temperature TS, wherein the FHmax is the maximum flow rate of the hot water pump.

3. When TS>(TH-TL)/2+TL, the temperature selected by the user is greater than the average water temperature of the hot water container and the normal temperature water container. At this time, when the hot water and the normal temperature water are mixed, more heat needs to be input. Water, the controller performs the following adjustment controls:

The heating device does not work, that is, makes PH=0;

The refrigerator does not work, that is, makes PC=0;

Control the hot water pump working flow FH to be the maximum flow rate FHmax;

Controlling and adjusting the working flow rate FL of the normal temperature water pump so that FL=(TH-TS)×FHmax÷(TS-TL) to obtain the target water temperature; that is, according to the temperature difference between the target water temperature and the hot water and the temperature difference between the target water temperature and the normal temperature water. The ratio corresponds to the working flow of the hot water pump to control the working flow of the normal temperature water pump. For example, if the hot water of the hot water container is kept at 80 ° C, the normal temperature water of the normal temperature water container is 20 ° C, and the target temperature selected by the user is 60 ° C, the working flow rate of the hot water pump is controlled to be the maximum flow rate FHmax, and the working flow rate of the normal temperature water pump FL It is (80-60) ÷ (60-20) × FHmax = 1/2 FHmax.

4. When TS=(TH-TL)/2+TL, the temperature selected by the user is equal to the average water temperature of the hot water container and the normal temperature water container. When the hot water and the normal temperature water are mixed, only the same amount of heat needs to be input. Water and normal temperature water can be used, and the controller performs the following adjustment control:

The heating device does not work, that is, makes PH=0;

The refrigerator does not work, that is, makes PC=0;

Control the working flow of the hot water pump FH=the working flow rate FL of the normal temperature pump to obtain the target water temperature;

5. When TS<(TH-TL)/2+TL, the temperature selected by the user is lower than the average water temperature of the hot water container and the normal temperature water container. When the hot water and the normal temperature water are mixed, more normal temperature water needs to be input. The controller performs the following adjustment controls:

The heating device does not work, that is, makes PH=0;

The refrigerator does not work, that is, makes PC=0;

Control the normal temperature pump working flow FL to be the maximum flow rate FLmax;

Controlling the flow rate FH of the hot water pump so that FH=(TS-TL)×FLmax÷(TH-TS) to obtain the target water temperature; this is similar to the case of TS>(TH-TL)/2+TL, that is, According to the ratio of the temperature difference between the target water temperature and the hot water to the temperature difference between the target water temperature and the normal temperature water, the working flow rate of the normal temperature water pump is used to control the working flow of the hot water pump. For example, if the hot water of the hot water container is kept at 80 ° C, the normal temperature water of the normal temperature water container is 20 ° C, and the target temperature selected by the user is 40 ° C, the working flow rate of the normal temperature water pump is controlled to be the maximum flow rate FLmax, and the working flow rate of the hot water pump FH It is (40-20) ÷ (80-40) × FLmax = 1/2 FLmax.

6. When TS=TL, that is, when the temperature selected by the user is equal to the water temperature of the normal temperature water container, the controller performs the following adjustment control:

The heating device does not work, that is, makes PH=0;

The refrigerator does not work, that is, makes PC=0;

The hot water pump does not work, that is, FH=0;

Controlling and adjusting the working flow rate FL of the normal temperature water pump to the maximum flow rate FLmax, thereby obtaining the target water temperature;

7. When TS<TL, that is, when the temperature selected by the user is lower than the water temperature of the normal temperature water container, the controller performs the following adjustment control:

The hot water pump does not work, that is, FH=0;

The heating device does not work, that is, makes PH=0;

And the controller further determines and controls the normal temperature water pump according to the relationship between PCmax and FLmax×4.2×(TL-TS).

The working flow FL and the power of the conditioning refrigerator PC, including:

1) When PCmax>FLmax×4.2×(TL-TS), when the normal temperature pump output flow is maximum and the refrigerator power is still large enough

The controller adjusts the normal temperature water pump working flow rate FL to the maximum flow rate FLmax, that is, makes FL=FLmax;

At the same time, the controller adjusts the power PC of the refrigerator such that PC = FLmax × 4.2 × (TL-TS);

2) When PCmax=FLmax×4.2×(TL-TS), when the output flow rate of the normal temperature water pump is the maximum, the power of the refrigerator is equal to the power required for the normal temperature water to be cooled.

At the same time, the controller adjusts the power PC of the refrigerator to the maximum power PCmax, that is, makes PC=PCmax;

3) When PCmax < FLmax × 4.2 × (TL-TS), when the normal temperature water output flow is maximum and the refrigerator power is insufficient

The controller adjusts the power of the refrigerator PC to the maximum power PCmax, that is, makes PC=PCmax;

At the same time, the controller adjusts the normal temperature pump working flow rate FL such that FL = PCmax ÷ (4.2 × (TL-TS)).

This is similar to the principle of the first case described above, and is also based on the specific heat capacity formula Q=cmΔT, and the specific heat capacity of water is 4.2 J/(g·°C), then the water is cooled from the TL temperature to the TS temperature, according to the first case. In the case of the maximum flow rate FLmax of the normal temperature water pump, the required cooling power is pC=4.2×FLmax×(TL-TS); Accordingly, according to the third case, it is necessary to adjust the working flow rate of the normal temperature water pump according to the maximum cooling power of the refrigerator, that is, to make FL=PCmax÷(4.2×(TL-TS)).

It should be further noted that the above control method embodiments are only preferred, and the respective embodiments are to ensure that the water pump operates at the maximum flow rate. Only when the water pump operates at the maximum flow rate, the heating device or the refrigerator is insufficient to provide sufficient When heating power or cooling power, the flow rate of the water pump is adjusted according to the maximum power of the heating device or the refrigerator. For example, in the first case, when TS>TH, and when PHmax>FHmax×4.2×(TS-TH), the controller controls the normal temperature water pump not to work (FL=0), and the refrigerator does not work (PC=0). If the controller adjusts the hot water pump working flow FH to the maximum flow rate FHmax, ie FH=FHmax; the heating device power PH should be PH=FHmax×4.2×(TS-TH); if the controller adjusts the hot water pump working flow FH to the maximum One value in the flow range FHx (ie FHmax>FHx>0), so that FH=FHx, then the power PH of the heating device should be PH=FHx×4.2×(TS-TH); that is, at this time The hot water pump does not operate at the maximum flow rate, and the heating device operates at a lower power accordingly. Therefore, the above control method embodiment As a preferred way, in the case that the target temperature can be obtained, it is premised on ensuring that the water pump operates at the maximum flow rate, so that the water discharge amount can be maximized, and the waiting time for the user to take water is avoided.

Further, the normal temperature water pump and the hot water pump of the water dispenser to which the above control method is applied are a metering pump, and the metering pump is provided with an encoder for detecting the rotation speed of the metering pump. Step S0 further includes: initializing the setting before the water is taken by the water dispenser, and the hot water pump and the normal temperature water pump of the water dispenser are uniformly distributed between the maximum speed and the minimum speed through testing in a range of maximum flow rate and minimum flow rate. The speed-flow correspondence table composed of the rotational speed stores the table in the control system of the controller; step S2 further includes: according to the temperature selected by the user, the controller calculates the working flow FH of the hot water pump and the working flow of the normal temperature water pump according to different situations. In the case of FL, the controller's control system calculates the respective rotational speed values of the hot water pump and the normal temperature water pump according to the calculated hot water pump working flow rate FH and the normal temperature water pump working flow FL by referring to the speed-flow correspondence table, and in the effluent The process is to correct the respective rotation speeds of the hot water pump and the normal temperature water pump to adjust the output control amount of the two pumps in real time so that the flow rates of the two pumps work according to a specified ratio; further, according to the water volume selected by the user, the controller Calculating the amount of water that each of the hot water pump and the normal temperature water pump needs to output, combined with the The speed-flow correspondence table calculates the number of pulses to be fed back by the respective encoders under the water quantity that each pump needs to output, and continuously feeds back the encoders of the hot water pump and the normal temperature water pump at a certain time interval in the water discharge process. The number of pulses returned is compared and calculated to determine whether the user selected water output is reached. Through the application of the encoder, the flow rate of the hot water pump and the normal temperature water pump can be ensured to work according to the specified ratio, further ensuring the accuracy of the water outlet temperature, and the accuracy of the water output amount, and ensuring the constant temperature and the quantitative water output.

It can be seen from the above control method that the embodiment of the present invention can adopt two types of variables such as heating device (or refrigerator) and water pump adjustment (specifically, heating device heating power, refrigerator cooling power, normal temperature water pump working flow rate, hot water pump working flow rate). Four variables) achieve adjustment of the final outlet temperature. Therefore, when the hot water is output, it is possible to preferentially ensure that the hot water pump operates at the maximum flow rate, and the heating power of the heating device (especially the function of secondary heating) adjusts the temperature of the hot water to be output, so that the temperature of the outlet water is satisfied. It is also possible to discharge a large amount of water, so that the water discharge time is short, and the user is prevented from waiting for a long time, which overcomes the defects in the prior art that when the hot water is obtained, the water discharge time is slow and it takes a long time to wait. When the cold water is to be output, the same principle is given, and the normal temperature water pump is preferentially operated at the maximum flow rate, and the output cold water temperature is adjusted by the power of the refrigerator to ensure a large amount of water and reduce the waiting time of the user. In the embodiment of the invention, the quantitative constant temperature output water is realized by the precise water discharge flow rate and the water discharge amount of the hot water pump and the normal temperature water pump; the output hot water (or cold water) is increased by the secondary heating function (or the refrigerator) of the heating device. The adjustment variable allows the user to prioritize the pump to operate at maximum flow rate when taking water, resulting in a large amount of water and a short waiting time.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, and the equivalent changes made by the scope of the present invention remain within the scope of the present invention.

Claims

A water dispenser capable of quantitatively determining temperature and effluent, characterized in that: the water dispenser comprises a casing (1);

a normal temperature water container (2) for outputting a normal temperature water pump assembly (3) of normal temperature water, and a temperature sensor (21) is provided in the normal temperature water container;

a hot water container (4) having a heat insulating function, a hot water pump assembly (5) for outputting hot water, wherein the hot water container is provided with a heating device, and the hot water container is provided with a temperature sensor (41) and a liquid level detecting Device (42);

a water pump assembly for injecting water into a hot water container;

a hot and cold water mixer (6) for mixing normal temperature water and hot water;

A controller (9) that controls the operation of the water dispenser.
A water dispenser capable of quantitatively tempering water according to claim 1, wherein said normal temperature water pump assembly and said hot water pump assembly employ a metering pump.
A water dispenser capable of quantitatively tempering water according to claim 2, wherein said metering pump is a gear pump.
The water dispenser according to claim 2 or 3, wherein the hot water pump (50) of the hot water container passes through a bracket tube (52) that extends into the hot water container (4). Installed inside the hot water container (4), the drive shaft (51) of the hot water pump is disposed in the bracket tube (52), and the outer end of the drive shaft (51) is installed in the hot water container (4) The outer motor (58) is connected by a drive or via a coupling.
The water dispenser capable of quantitatively arranging water according to claim 4, wherein the transmission shaft (51) and the motor (58) are belt-driven, the pulley (54) on the motor and the pulley (53) on the transmission shaft. Set for deceleration.
The water dispenser capable of quantitatively determining the temperature and effluent according to claim 2 or 3, wherein the normal temperature water pump (30) of the normal temperature water container (2) passes through a bracket tube extending into the normal temperature water container (2) (32) installed inside the normal temperature water container (2), the transmission shaft (31) of the normal temperature water pump (30) of the normal temperature water container is disposed in the bracket tube (32), outside the transmission shaft (31) The end is drivingly connected to a motor (38) installed outside the normal temperature water container (2).
The water dispenser capable of quantitatively determining the temperature and effluent according to claim 6, wherein the transmission shaft (31) of the normal temperature water pump (30) in the normal temperature water container (2) and the motor (38) are belt driven, and the motor ( 38) The upper pulley (34) and the pulley (33) on the drive shaft (31) are set for deceleration.
A water dispenser capable of quantitatively calibrating effluent according to claim 2, wherein said ambient temperature water pump assembly (3) and hot water pump assembly (5) comprise an encoder for detecting the speed of the metering pump.
The water dispenser capable of quantitatively arranging water according to claim 1, wherein the normal temperature water pump and the water supply pump for injecting water into the hot water container are the same pump, and the utility model comprises two valves and two water outlets. To the hot and cold water separately The mixer supplies water or a two-way pump that injects water into the hot water container.
The water dispenser capable of quantitatively determining temperature and effluent according to claim 1, wherein the heating device in the hot water container can reheat the water of the hot water container during the water discharge process.
The water dispenser capable of quantitatively determining temperature and effluent according to claim 10, wherein the heating device is integrally installed with the water pipe of the hot water pump assembly and sent to the hot and cold water mixer, and the heating device can be used for hot water. The water in the container is heated and the hot water can be reheated during delivery to the hot and cold water mixer in the water pipe.
The water dispenser of claim 11, wherein the heating device comprises a metal tube (442) having a groove (443) on the inner wall, disposed in the metal tube (442) and the a heat pipe (441) which is closely attached to the inner wall of the metal pipe (442) and is concentrically mounted, and a groove (443) of the inner wall of the metal pipe (442) forms a water pipe for water supply to the hot and cold water mixer (6). The bottom end of the metal pipe (442) is connected to the output port of the hot water pump (50) through a pipe, and the top end of the metal pipe (442) passes through the hot water inlet (62) of the pipe and the hot and cold water mixer (6). connection.
The water dispenser of claim 12, wherein the top end of the metal tube (442) is connected to a connecting tube (444) having a side opening (4441) at the joint, the metal The tube wall of the top end of the tube (442) is provided with a slot (4421) corresponding to the opening (4441) of the connecting tube (444), the slot (4421) of the metal tube (444) and the connecting tube (444) The opening (4441) leads to the conduit of the hot water inlet (62) of the hot and cold water mixer (6), and the electric wire of the heat pipe (441) is led out through the end of the connecting pipe (444).
A water dispenser capable of quantitatively tempering water according to claim 10, wherein said heating means comprises a conventional heater (440) and a secondary heater (45), said secondary heater (45) comprising a a metal tube (452), a heat pipe (451) disposed in the metal pipe (452) concentrically mounted with the metal pipe (452), and an annular water flow passage between the heat pipe (451) and the metal pipe (452) (453) The bottom end of the metal pipe (452) is connected to the output port of the hot water pump (50) through a pipe, and the top end of the metal pipe (452) passes through the hot water inlet of the pipe and the hot and cold water mixer (6). (62) Connection.
The water dispenser capable of quantitatively determining the temperature and effluent according to claim 1, wherein the liquid level detecting device is a liquid level sensor (200) capable of detecting multiple points, and the liquid level sensor (200) is internally a long strip circuit board (201) of the liquid level detecting circuit, wherein the liquid level detecting circuit comprises a resistor circuit composed of N resistors connected in series, and correspondingly has N transistors, one end of the resistor circuit and grounding a terminal is connected, and the other end is a liquid level voltage output end; a collector of each of the transistors is respectively connected to a series node of each resistor of the resistor circuit; an emitter of each of the transistors is connected to a ground terminal; The bases of the transistors are respectively connected to a detecting electrode; each of the detecting electrodes respectively corresponds to a detecting point; the liquid level detecting circuit is further provided with a voltage dividing resistor, and one end of the voltage dividing resistor is connected at The liquid level voltage output end is connected to the first power supply terminal; the first power supply terminal supplies power to the liquid level detecting circuit; the first power supply terminal can pass the liquid and the detecting A conductive electrode; said level detecting circuit uses an insulating material for all circuits other than the sensing electrode into the first power supply terminal and the output terminal of the voltage level Line sealing.
The water dispenser capable of quantitatively tempering and effluent according to claim 15, wherein the resistance value R m of the resistor of the mth series connection node of the resistance circuit is related to the resistance value R 0 of the voltage dividing resistor:

Where m is a positive integer and 1≤m≤N-1;
The sum of the resistance values of the first resistor to the mth resistor from top to bottom of the liquid level detecting circuit; and, when m=N, the resistance value R N of the Nth resistor is a custom resistance value. R r , or, the Nth resistor is removed in the resistor circuit. And R & lt resistance value R1 of m to m-th node of the first resistor connected in series to said level detecting circuit top-down resistor.
The multi-point liquid level detecting circuit according to claim 16, wherein the resistance value of the mth resistor in the resistance circuit is:

Moreover, when m=N, the resistance value R N of the Nth resistor is a custom resistance value R r , or the Nth resistor is removed in the resistance circuit to achieve a resistance value. R N is an infinite value.
A water dispenser capable of quantitatively tempering and effluent according to claim 15, wherein said circuit board (201) further comprises a common electrode not sealed by said insulating material; said common electrode passing said wire and said The first power supply terminal is connected; the common electrode may be electrically connected to the detection electrode through a liquid.
The water dispenser capable of quantitatively tempering and effluent according to claim 18, wherein:

The liquid level voltage output end, the first power supply terminal and the grounding terminal are disposed at a top of the circuit board; the temperature sensor of the normal temperature water container and the temperature sensor of the hot water container are respectively disposed on the circuit board The bottom end.
The water dispenser capable of quantitatively tempering and effluent according to claim 1, wherein the normal temperature water pump (30) is connected in series with the pipeline of the normal temperature water inlet (61) of the hot and cold water mixer (6). Refrigerator (7).
The water dispenser capable of quantitatively arranging water according to claim 1, wherein the water dispenser has a self-priming pump (17) or a solenoid valve, and the self-priming pump (17) or the output port of the solenoid valve (172). The ambient temperature water container (2) is connected by a pipe, and the inlet port (171) of the self-priming pump (17) or the solenoid valve is connected to the external water source port (173) through a pipe.
The water dispenser capable of quantitatively tempering and effluent according to claim 1, wherein the water dispenser has normal temperature water The upper part of the container (2) is provided with a water injection port which can be manually filled with water.
The water dispenser capable of quantitatively tempering and effluent according to claim 1, wherein:

The hot water container (4) is a glass inner liner or a double stainless steel container.
The water dispenser capable of quantitatively tempering water according to any one of claims 1 to 23, characterized in that the normal temperature water container (2) surrounds and surrounds the hot water container (4).
The invention relates to a method for controlling the output water of a water dispenser, which is characterized in that it is applied to the constant temperature and quantitative water discharge control of the water dispenser according to claim 1, and the water dispenser further has a normal temperature water for the normal temperature water container to be cooled in the water discharge process. The chiller can reheat the hot water of the hot water container in the effluent process, the method comprising:

Step S1: When the water dispenser is turned on and works normally, the controller detects the temperature TL of the normal temperature water in real time through the temperature sensor of the normal temperature water container, and detects the temperature TH of the hot water in real time according to the temperature sensor of the hot water container;

Step S2: The controller determines the relationship between the selected water temperature TS and the water temperature TH of the hot water container and the water temperature TL of the normal temperature water container according to the water temperature TS selected by the user, and controls according to the relationship between the TS and the TH and the TL. The heating power PH, and/or the regulating refrigerator, respectively, by adjusting the hot water pump working flow FH in the hot water tank, and/or adjusting the heating device in the hot water container to heat the hot water in the hot water container during the water discharging process The cooling power PC for cooling the water in the normal temperature water container during the water discharge process, and/or adjusting the working flow rate FL of the normal temperature water pump in the normal temperature water container to obtain the target water temperature TS.
The method for controlling the output water of the water dispenser according to claim 30, wherein the step S2 is specifically:

When the controller determines that the temperature selected by the user is greater than the water temperature of the hot water container, that is, TS>TH, the controller controls the normal temperature water pump to not work, the refrigerator does not work; and the controller further determines and according to PHmax and FHmax×4.2×(TS The relationship between -TH) controls the hot water pump working flow FH and the power PH of the regulating heating device, wherein the PHmax and FHmax respectively refer to the maximum power that the heating device can provide for heating the output hot water and the maximum of the hot water pump. Traffic, including:

When PHmax>FHmax×4.2×(TS-TH), the controller controls the hot water pump working flow FH to be the maximum flow rate FHmax, and adjusts the power PH of the heating device so that PH=FHmax×4.2×(TS-TH);

When PHmax=FHmax×4.2×(TS-TH), the controller controls the hot water pump working flow FH to be the maximum flow rate FHmax, and adjusts the power PH of the heating device to the maximum power PHmax;

When PHmax<FHmax×4.2×(TS-TH), the controller adjusts the power PH of the heating device to the maximum power PHmax, and adjusts the hot water pump working flow FH such that FH=PHmax÷(4.2×(TS-TH));

Alternatively, the step S2 is specifically:

When the controller determines that the temperature selected by the user is equal to the water temperature of the hot water container, that is, TS=TH, the controller controls the normal temperature water pump to not work, the refrigerator does not work, the heating device does not work, and adjusts the hot water pump working flow FH to the maximum flow rate. FHmax;

Alternatively, the step S2 is specifically:

When the controller determines that the temperature selected by the user is greater than the water temperature of the normal temperature water container and less than the water temperature of the hot water container, When TH>TS>TL, the controller controls the heating device to be inoperative and the refrigerator does not work; and the controller further determines and controls the hot water pump working flow FH according to the relationship between TS and (TH-TL)/2+TL. Adjust the normal temperature pump working flow FL, including:

When TS>(TH-TL)/2+TL, the controller controls the hot water pump working flow FH to be the maximum flow rate FHmax, and adjusts the normal temperature pump working flow rate FL so that FL=(TH-TS)×FHmax÷(TS-TL );

When TS=(TH-TL)/2+TL, the controller controls the hot water pump working flow FH=normal temperature water pump working flow FL;

When TS<(TH-TL)/2+TL, the controller controls the normal temperature pump working flow FL to be the maximum flow rate FLmax, and adjusts the working flow FH of the hot water pump so that FH=(TS-TL)×FLmax÷(TH- TS);

Alternatively, the step S2 is specifically:

When the controller determines that the temperature selected by the user is equal to the water temperature of the normal temperature water container, that is, TS=TL, the controller controls the heating device not to work, the refrigerator does not work, the hot water pump does not work, and adjusts the working flow rate FL of the normal temperature water pump to be maximum Flow rate FLmax;

Alternatively, the step S2 is specifically:

When the controller determines that the temperature selected by the user is lower than the water temperature of the normal temperature water container, that is, TS<TL, the controller controls the hot water pump not to operate, the heating device does not work, and the controller further determines and according to PCmax and FLmax×4.2×(TL -TS) relationship between controlling the normal temperature pump working flow rate FL and adjusting the power of the cooling unit PC, wherein the PCmax is the maximum power of the refrigerator, including:

When PCmax>FLmax×4.2×(TL-TS), the controller controls the normal temperature water pump working flow rate FL to be the maximum flow rate FLmax, and adjusts the power PC of the refrigerator so that PC=FLmax×4.2×(TL-TS);

When PCmax=FLmax×4.2×(TL-TS), the controller controls the normal temperature water pump working flow rate FL to be the maximum flow rate FLmax, and adjusts the power of the refrigerator PC to the maximum power PCmax;

When PCmax<FLmax×4.2×(TL-TS), the controller controls the power PC of the refrigerator to be the maximum power PCmax, that is, makes PC=PCmax, and adjusts the normal temperature pump working flow FL so that FL=PCmax÷(4.2×( TL-TS)).
A method for controlling output water of a water dispenser according to claim 26, wherein:

The heat pump and the normal temperature water pump are metering pumps, and the metering pump is provided with an encoder for detecting the speed of the metering pump;

Step S0 further includes:

The water dispenser is initialized after being turned on, and the hot water pump and the normal temperature water pump of the water dispenser are tested to establish a speed-flow corresponding to a plurality of speeds uniformly distributed between the maximum speed and the minimum speed in the range of maximum flow and minimum flow. a relational table that stores the form in the controller's control system;

Step S2 further includes: according to the temperature selected by the user, when the controller calculates the hot water pump working flow FH and the normal temperature water pump working flow FL according to different situations, the controller control system calculates the hot water pump working flow FH and the constant The working flow rate of the warm water pump FL is calculated by the algorithm according to the speed-flow correspondence table, and the respective rotational speed values of the hot water pump and the normal temperature water pump are calculated by the algorithm, and the respective rotational speeds of the hot water pump and the normal temperature water pump are corrected in the water discharging process to adjust two in real time. The output control of the pump allows the flow of the two pumps to operate at a specified ratio;

According to the amount of water selected by the user, the controller calculates the amount of water that each of the hot water pump and the normal temperature water pump needs to output, and combines the speed-flow correspondence table to calculate the feedback of the two pumps under the respective amounts of water that need to be output. The number of pulses, and in the process of water discharge, at a certain time interval, the number of pulses fed back by the encoder of the hot water pump and the normal temperature water pump is continuously compared and calculated to detect whether the water volume selected by the user is reached.