CN101579192B - Healthy energy-saving water dispenser - Google Patents

Abstract

Healthy and energy-saving drinking fountains aim at healthy and energy-saving. Based on programmable logic devices, the reconstruction of drinking fountains and the design of control logic are designed for home and office users. A variety of technologies are used to meet the needs of different users to the greatest extent. , the water dispenser includes three sequentially connected water tanks and pipes and controllers connecting the three water tanks; wherein, the first water tank (1) is a water inlet, used to hold raw water that has not been burned; the second water tank (2) It is used to boil water. During use, directly boil the raw water injected into the water tank. After boiling, disconnect the power supply and wait for the next water injection; the third water tank (3) is provided with a water outlet, has a heat preservation function, and has The multi-level adjustable water temperature controller pumps boiled water when the water level is not enough to meet the needs of users for different water temperatures; the water transmission control device from the cold water area to the boiling water area is a micro submersible pump. The water transmission control device from the boiling water area to the warm water area is a solenoid valve; the controller automatically controls the work of the entire water dispenser.

Description

Healthy and energy-saving water dispenser

technical field

The present invention is aimed at health and energy saving, and carries out the reconstruction of the water dispenser and the design of the control logic based on the programmable logic device (CPLD, Complex Programmable Logic Device). This product is specially designed for home and office users. It adopts a variety of technologies to meet the needs of different users to the greatest extent, and has practical value.

Background technique

At present, most of the water dispensers used in homes and offices mainly have two problems: the one is that the water temperature cannot be adjusted, and there is no heat preservation function. The user can only get boiling water at 100°C each time. If he wants to get drinkable warm water, he must find a way to cool it himself, which is extremely inconvenient to use. Second, there is the problem of "thousand boiling water". Can obtain boiled water at any time for guaranteeing user, common water dispenser boils part of water repeatedly. Boiling for too long or multiple times of boiling water contains a lot of non-volatile substances such as calcium, magnesium and other heavy metals and nitrite. Drinking this kind of water for a long time will interfere with people's gastrointestinal function, causing hypoxia in the body, dizziness, headache, Palpitation, chest tightness, nausea, vomiting, abdominal pain, diarrhea and other conditions.

According to the sampling survey, it is found that the water temperature requirement of most people's drinking water is between 30 and 80 ℃. In addition, after certain market research and data research, it is found that the boiling water temperature for brewing beverages such as tea or coffee is 80°C. Based on the above situation, the water dispenser designed by the present invention boils the water only once, which solves the health problems caused by "thousand boiling water"; and adds a heat preservation function. ℃, to meet the needs of different groups of people for drinking water temperature; at the same time, it has a forced heating mode to meet the needs of users for brewing tea and coffee.

Under the situation that health and energy saving become the theme of the times, the present invention adopts a series of technical measures to realize health and energy saving in many aspects of the water dispenser.

Contents of the invention

Technical problem: The healthy and energy-saving water dispenser designed by the present invention focuses on the two major themes of health and energy saving, and solves the problem of "thousands of boiling water" and users' different needs for drinking water temperature.

Technical solution: The healthy and energy-saving water dispenser designed by the present invention includes three sequentially connected water tanks, pipes and controllers connecting the three water tanks; among them, the first water tank is the water inlet end, which is used to hold unburned raw water ;The second water tank is used to boil water. During use, directly boil the raw water injected into the water tank. After boiling, cut off the power supply and wait for the next water injection; the third water tank has a water outlet, has a heat preservation function, and has multiple gears The water temperature controller can be adjusted to pump boiled water when the water level is not enough to meet the needs of users for different water temperatures; the water transmission control device from the cold water area to the boiling water area is a micro submersible pump, The transmission control device of water to the warm water area is a solenoid valve; the controller automatically controls the work of the entire water dispenser.

Main control module: Programmable logic device CPLD is selected for the collection of all signals of the system, logic processing and the formation and output of control signals, so as to realize the switching of various working states of the water dispenser;

Comer detection module: Use photoelectric switch to collect whether there is a signal passing by and transmit it to CPLD for logic analysis;

Water level detection module: Insert a metal probe at the defined water level in each water tank, and use the partial pressure of water and a large resistance to judge whether the specified water level is reached; each water tank outputs two signals indicating high and low water levels respectively. Signal to CPLD;

Temperature detection module: use the integrated temperature sensor chip DS18B20 that directly outputs digital quantities, and use CPLD to communicate with it to obtain the temperature that meets the required accuracy;

Relay control module: CPLD controls the output high and low levels, amplified by the triode, as the control signal of the control relay, controls the 220V AC working power supply of the warm water tank, hot water tank and submersible pump, and determines whether it works; in addition, the solenoid valve DC 12V A relay is also added to the working power circuit, and the relay control signal provided by the CPLD is amplified to control whether the solenoid valve works or not;

Human-computer interaction module: receive the control signal from CPLD, visually display the current working status of the system through the LCD screen and color LED; set the working status of the system to CPLD through feedback signals of several buttons on the panel.

In said controller:

Water level detection module: the water level probe is connected to the wire, through the resistance divider and the comparator LM339, the output of the comparator is connected to the IO port of the main control module CPLD, and provides the current water level signal of each water tank to the CPLD, respectively indicating the high and low water levels of the three water tanks Signal;

Temperature detection module: digital sensor DS18B20 adopts 1-Wire interface, this data line is connected to the I/O port of the main control module CPLD, and provides real-time digital temperature data to the CPLD chip;

People detection module: the output signal of the photoelectric sensor is judged by the comparator LM339 and outputs high and low levels, which is connected to the IO port of the CPLD chip of the main control module to judge whether someone is approaching;

Relay control module: The main control module CPLD generates a control output signal according to the input information such as water temperature, water level, presence or absence and preset control logic, which is amplified by the triode as the control input signal of each relay of the relay control module to control the warm water tank , hot water tank, submersible pump 220V AC power supply and solenoid valve 12V DC power supply to determine whether it works;

Human-computer interaction module: The colorful LED indicator light that displays the temperature is directly connected to the I/O port of the main control module CPLD, and the actions such as display, flashing, and cycle are directly controlled by the CPLD. All display information of the liquid crystal module is directly provided by the CPLD chip. The signal of the input button is directly connected to the external I/O port of the CPLD, and the signal is directly input to the CPLD as a control signal.

The control logic of main control module CPLD in the described controller is:

The CPLD input signals of the main control module of the controller include: 1) high and low water level signals in the raw water area, heating area and heat preservation area; 2) temperature feedback signals of the temperature detection chip DS18B20 in the heat preservation water tank and hot water tank; 3) incoming person detection The incoming detection signal of the module photoelectric sensor; 4) the Reset button, Force button, Smart button, SetDown button, and SetUp button signal on the user interaction panel;

The output signals include: 1) heating signal of the heating water tank; 2) heating signal of the heat preservation water tank; 3) control signal of the submersible pump; 4) control signal of the solenoid valve; 5) control signal of the liquid crystal display module; 6) control signal of the running water lamp;

The control logic design of the main control module CPLD of the controller adopts the state machine theory to realize a multi-input and multi-output system. According to the operating characteristics of the system, the operating state of the system is divided into four types: error reporting state, standby state, intelligent heat preservation state, and forced heating state;

The error status occurs when the system has an error, including: 1) High water level signal is detected but no low water level signal is detected for the same water tank; 2) Temperature detection shows that it exceeds 100°C for a long time.

In the error reporting state, the running water lights are all off, the submersible pump is off, the solenoid valve is off, the heating of the heat preservation water tank is turned off, the heating of the heating water tank is turned off, and the status bar of the LCD screen displays error. The system jumps from the error state to the intelligent heat preservation state only through user communication Reset button on the panel;

The standby state occurs in the following situations, including: 1) The presence detection signal lasts for more than one hour, indicating that there is no one; 2) The water level detection of the three water tanks is all low;

In the standby state, the running water lights are all off, the submersible pump is turned off, the solenoid valve is turned off, the heating of the heat preservation water tank is turned off, the heating of the heating water tank is turned off, and the status bar of the LCD screen displays Hold. The conditions for the system to jump from the standby state to the intelligent heat preservation state are: 1 ) The incoming detection signal transmits the signal indicating that there are people; 2) Adding water in the raw water area changes the situation that the three water tanks are all low water levels;

The forced heating state appears when the system is in the intelligent heat preservation state, after the user presses the Force button;

In the forced heating state, the insulation water tank is fully heated, the status bar of the LCD screen displays Force, and the heating water tank, submersible pump and solenoid valve all follow the working mode in the intelligent state;

The conditions for the system to jump from the standby state to the intelligent heat preservation state are: 1) the user presses the Smart key on the panel; 2) the temperature of the heat preservation water tank reaches 80°C;

In addition to the standby state, error reporting state, and forced heating state, the system is in an intelligent heat preservation state;

The intelligent heat preservation state is divided into two working modes according to whether the water in the boiling water area is boiled;

Working mode 1: the boiling water area has been boiled

The heating tank does not heat up:

When the detection temperature of the insulation water tank is higher than the temperature set by the user or the water level in the insulation area is low, the insulation water tank will not be heated.

The running water lamp is fixedly displayed. According to the temperature of the heating zone, the higher the temperature, the more lamps.

submersible pump off,

When the insulation water tank is not full, open the solenoid valve to add the boiled water in the heating water tank to the warm water area until the water level in the warm water area is full or the water level in the boiling water area is low.

When the water level in the raw water area is low, the system prompts to add water, and the prompt bar on the LCD screen displays "Add",

Keep this state for 24 hours, the system prompts to change the water, and the prompt bar on the LCD screen displays "Change",

If the water level in the boiling water area is low, refresh the boiling signal;

Working mode two: the boiling water area is not boiled

When the water level of the heating water tank is not low, it will continue to heat. If the temperature of the heating water tank is detected to be above 95°C for 30 seconds, a boil signal will be provided.

When the detection temperature of the insulation water tank is higher than the temperature set by the user or the water level in the insulation area is low, the insulation water tank will not be heated; if the detection temperature of the insulation water tank is lower than the temperature set by the user and the water level in the insulation area is not low, the insulation water tank will be heated;

The running water lamp scrolls and flickers to let the user intuitively feel that the heating water tank is working. According to the temperature of the heating zone, the higher the temperature, the more the number.

Solenoid valve closed,

When the heating water tank is not full, turn on the submersible pump to pump the water in the raw water area into the heating water tank until the heating water tank is full or the water level in the cold water area is low.

When the water level in the raw water area is low, the system prompts to add water, and the prompt bar on the LCD screen displays "Add".

Beneficial effect:

1. To meet the needs of different users, the heat preservation temperature can be adjusted at will.

At present, most people require the water temperature to be between 18 and 45°C, and most water dispensers used in homes and offices cannot set the heat preservation temperature by the user, and can only get boiled water at 100°C, which is extremely inconvenient to use. Therefore, in our design, the heat preservation temperature range can be set at 30~80°C, with a step of 5°C, to meet various heat preservation requirements. Because the water temperature of 80°C is the most suitable for making tea or coffee, the nutrients in it will not be affected at this temperature. Therefore, the maximum set water temperature required by the user is 80°C.

2. Realize forced heating, so that people can also get water at the temperature of making tea in the smart mode.

Ordinary water dispensers can only boil the water repeatedly when the user needs to make tea. According to the survey data, the water temperature of 80°C is the most suitable for making tea or coffee, and the nutrients in it will not be affected at this temperature. So repeated boiling is completely unnecessary. We specially set the forced heating button so that users can get water at the temperature of making tea.

3. Realize healthy drinking water, only boil once, avoid thousands of boiling water.

The content of non-volatile substances such as calcium, magnesium and other heavy metals and nitrite in the water is very high due to boiling for too long or multiple times. Drinking this kind of water for a long time will interfere with human gastrointestinal function, causing the body to lack oxygen, dizziness, headache, palpitation, chest tightness, nausea, vomiting, abdominal pain, diarrhea and other conditions. The boiling area in our design is completely isolated from the heat preservation area, completely eliminating the possibility of thousands of boiling water.

4. After drinking the boiled water for a long time, prompt to change the water.

According to scientific investigations, water that has been boiled for a long time for 24 hours will have an impact on health. The water dispenser designed by the present invention will automatically prompt the user to replace the water when the water is boiled for 24 hours, so as to urge the user to develop the habit of drinking water healthily.

5. Energy saving, application of visitor detection.

When the user is not near the water dispenser for a long time, the dispenser will automatically switch to the standby state to save energy.

Description of drawings

Figure 1 is a schematic structural diagram of a water dispenser.

Figure 2 is a block diagram of the hardware structure of the water dispenser.

Fig. 3 is a schematic diagram of division of functional modules of the water dispenser controller.

Fig. 4 is a schematic diagram of the control panel of the water dispenser.

Fig. 5 is a working flow diagram of the water pump from the cold water zone to the boiling water zone.

Fig. 6 is a working flow diagram of the water valve from the boiling water zone to the warm water zone.

Fig. 7 is a working flow chart of heating the water tank in the warm water zone.

Figure 8 is a schematic diagram of the overall external circuit.

Detailed ways

The whole water dispenser comprises three water tanks with a volume of 1.2L and pipelines connecting the three water tanks. The purpose of adopting this structure of three water tanks is to meet the user's requirement for water temperature and keep the raw water separate from the boiled water. Among them, the first water tank is used to hold raw water that has not been boiled; the second water tank is used to boil water. During use, the raw water injected into the water tank is directly boiled to 100°C. water injection; the third water tank has the function of heat preservation, and has a multi-level adjustable water temperature controller. When the water level is not full, the boiled water is pumped in to meet the needs of users for different water temperatures. The water transmission control device from the cold water area to the boiling water area is a micro submersible pump, and the water transmission control device from the boiling water area to the warm water area is a solenoid valve. See attached drawing 1 for the equipment structure diagram.

The detection and control system of the healthy and energy-saving water dispenser designed by the present invention adopts a modular design, and the module division is shown in Figure 3.

The main control module is a high-performance programmable logic device CPLD, which is used for the collection and logic processing of all signals in the system and the formation and output of control signals, and realizes the function switching of various working states of the water dispenser.

The incoming person detection module uses the photoelectric switch to collect the signal of whether someone passes by and transmits it to the CPLD for logic analysis.

Water level detection module, each water tank has two signals for detecting high and low water levels and transmits them to CPLD. The method used to collect the water level signal is: insert a metal probe at the limited water level in the water tank, and use the partial pressure of the water and the large resistance resistor to judge whether it reaches the specified water level.

The temperature detection module uses an integrated temperature sensor chip DS18B20 that directly outputs digital quantities. The cost of this chip is not high, and the precision is high. It only needs to occupy one I/O port, and the temperature that meets the required precision can be obtained by communicating with CPLD.

The main control module CPLD controls the water lamp and the LCD screen to realize the system status display. A row of 8 LED lights shows the approximate temperature and heating status of the heating zone. The lamp flickers when heating, and the lamp glows steadily when not heating, giving users an intuitive impression. The LCD screen displays the current temperature of the heat preservation area and the temperature set by the user, and displays the current system status (standby, error, and normal) and the measures that need to be taken by the user (add water, change water, and normal).

There are also Reset button, Force button, Smart button, SetDown button, and SetUp button on the panel to realize manual setting and intervention on the working status of the water dispenser. Among them: Reset key to clear the system status, Force key to force heating, Smart key to switch back to smart state, SetUp key to increase the set temperature, SetDown key to decrease the set temperature, the step is 5°C.

The system is divided into three states: normal operation, failure, and standby. When working normally, the system is normal, and will perform operations and display prompts according to the state; in standby mode, the system will return to the normal working state only when the incoming signal and water level signal are judged to be normal; in the fault state, only reset Return the system to normal working condition.

The working logic of the system is as follows:

(1) In the boiling water zone, boil the tap water once, and then do not heat it.

(2) In the heat preservation mode, the warm water zone maintains the water from the boiling water zone at the temperature set by the user.

(3) In the forced heating mode, the warm water zone quickly heats the water from the boiling water zone to 80°C.

(4) When the boiling water area is empty, the water in the raw water area is added to the boiling water area until the water level in the cold water area is low or the boiling water area is full.

(5) When the warm water area is not full, add the boiled water in the boiling water area to the warm water area until the water level in the warm water area is full or the water level in the boiling water area is low.

(6) When no one enters for a long time, it will enter the standby state.

(7) The water level detection is abnormal, and it enters the standby error reporting state.

(8) Prompt to add water when the raw water area is not full.

(9) If the boiled water has not been drunk for a long time, it is suggested to change the water.

(1) Hardware structure of healthy and energy-saving water dispenser

The healthy and energy-saving water dispenser is composed of a main control module 1, a relay module 2, a water temperature detection module 3, an incoming person detection module 4, a water level detection module 5, a heating module 6, a heat preservation module 7, and a liquid crystal display module 8. Wherein, the main control module 1 can receive the signals of the water temperature detection module 3 , the incoming person detection module 4 and the water level detection module 5 as the basis for the next operation. The main control module directly controls the relay module 2 and the liquid crystal display module 8, and the relay module determines whether the heating module 6 and the heat preservation module 7 work or not, so as to realize various operations such as heating, heat preservation or standby; the liquid crystal display module 8 controls the liquid crystal screen, displays Set the heat preservation temperature, the real-time temperature in the heat-retention water tank, the real-time working status of the water dispenser and prompts. The contact block diagram of the specific hardware is shown in Figure 3.

1. Main control module

The main control module selects Altera's programmable logic device EPM1270T144C5N, which is used for the collection and processing of all signals in the system and the formation and output of control signals, to realize the function switching of each logic state of the water dispenser, and to have a certain processing speed, which is different from other The module connection interface is simple and convenient.

2. Relay control module

The relay control module uses HK3FF-DC12V-SH (T73) type relay. The first criterion to consider when selecting a relay is the contact current value. Because there is a 220V AC power supply in the peripheral circuit, the relay must be able to withstand a large enough current, otherwise it is easy to burn the device. HK3FF-DC12V-SH (T73) type relay has a contact current of 10A and a maximum switching current of 15A, which can meet the needs of the application.

Considering that the '0' and '1' signals provided by the CPLD are used to control the on-off of the relay, and the CPLD outputs a '1' signal of 3.3V, and the output current is in the order of several mA. According to the experimental measurement, the driving current in the coil of the HK3FF-DC12V-SH (T73) relay is about 20mA. Obviously, the current output by CPLD is not enough to drive the on-off of the relay, so the triode 2N3904 is selected as the amplifier device, and the maximum collector current Ic(max) can reach 200mA, which is enough to drive the relay.

Considering that there may be AC component interference in the output DC, add a capacitor between the base b and the emitter e of the triode (select a 0.1μF capacitor). In addition, if the output cannot guarantee the normal static operating voltage drop of 0.7V between the be stages of the triode, the triode will not have an amplification effect, and then the relay will not work normally, so a diode is added between the CPLD output terminal and the base of the triode , to ensure that the triode can be in the amplification area.

A resistor with a resistance value of 1KΩ is added between the CPLD output pin and the diode to convert the voltage signal output on the CPLD into a current signal, which is convenient for the next step to amplify the current to drive the relay.

The on-off relay uses the electromagnetic induction effect to work. If it is disconnected, a high reverse electromotive force may appear in the coil, which will cause damage to the device. Therefore, a Forward diode IN4148 (maximum reverse voltage 100V, forward voltage 1V), in order to release the direction electromotive force in the coil.

3. Water temperature detection module

The water temperature detection module uses DS18B20 chip, which is small in size and adopts a 1-wire bus structure, which is economical and flexible. The detection temperature range is between -55 and 125°C, and the accuracy is 2-5°C.

In the external circuit, you only need to connect 5V power supply and ground to the VDD terminal and GND terminal of DS18B20 respectively, and add a pull-up resistor (4.7KΩ) to the data output terminal and then connect it to the 5V power supply to ensure that the output data can be Normal serial transfer. The specific data transmission is carried out by the interaction between CPLD and DS18B20 directly according to the communication protocol.

4. Comer detection module

The coming detection module uses the characteristics of the proximity switch: when someone passes by, the data line of the proximity switch outputs a high level. The output signal of the photoelectric proximity switch is used as an input of LM339, and the reference comparison voltage is 5V. LM339 outputs 5V after judging by someone, and outputs 0V when no one passes by. The standard high and low levels 5V and 0V formed by the comparison result of LM339 are used as logic signal "1", and "0" is connected to CPLD for judging whether there is someone.

5. Water level detection module

The water level detection module utilizes a metal wire as a water level detection probe. If the water level is not reached, the resistance between the two probes is close to infinity. When the water level probe is submerged in water, the water conducts electricity to make the whole circuit conduct. Use 12V power supply, and use the divided voltage between water and the selected voltage dividing resistor to input the divided voltage value to the negative input terminal of LM339 (comparator), and connect the output of LM339 to CPLD to achieve the detection of water level the goal of.

Since pure water is a poor conductor, the resistance value is relatively large, and the resistance value of the voltage dividing resistor is also required to be relatively large.

In addition, the LM339 internally uses the OC gate output mode, so when outputting signals at the 4 output ports, a 4.7KΩ pull-up resistor must be connected first, and then connected to the 5V power supply to prevent the current from flowing backward into the chip and causing damage to the chip. damage.

6. Heating module 6, insulation module 7

The heating module and the heat preservation module use common electric water tanks for heating and heat preservation.

7. Liquid crystal display module 8

The liquid crystal display module selects 2×16 character liquid crystal display screens. CPLD analyzes according to all input signals, and then controls the LCD screen. The LCD screen can display the set heat preservation temperature, the real-time temperature in the heat-preservation water tank, the real-time working status of the water dispenser and prompts.

(2) Reliability analysis of water dispenser control

1. The problem of water temperature detection error

The water temperature detection chip DS18B20 is only placed on the outer wall of the water tank for sanitation and other considerations when it is installed. The water temperature measured by the outer wall must have a certain error from the actual one. Therefore, the temperature collected by DS18B20 cannot be directly applied, and error fitting processing is required.

In order to get an accurate temperature, compare the temperature detected by DS18B20 with the temperature directly detected, and get the following table: (DS18B20 detects Scan, the real temperature is Real, and the unit is °C)

real twenty one twenty two twenty three twenty four 25 26 27 28 29 30 31 32 33 34 35 36 37 scan 20 twenty one twenty one twenty two twenty two twenty three twenty three twenty four 25 26 27 28 29 29 30 31 32 real 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 scan 33 34 34 35 36 37 37 38 39 40 41 42 43 44 44 45 46 real 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 Scan 46 47 48 49 50 51 52 53 53 54 55 56 57 58 59 59 60 real 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 scan 61 62 63 64 65 65 66 67 68 68 69 70 70 71 72 73 74 real 89 90 91 92 93 94 95 96 97 98 99 Scan 75 76 76 77 78 79 80 81 82 83 84

From the test data in the above table, the actual temperature and the detected temperature error curve can be obtained, and the error curve can be analyzed: as the water temperature rises, the absolute error of the actual water temperature and the detected water temperature gradually increases. The detected water temperature needs to be processed as a function to make it fit the actual water temperature. For a temperature value that only requires integer-level processing, the number of decoding is extremely limited, so a direct decoding circuit is used to realize it, which is simple and easy to understand, and saves logic units.

2. The noise problem of the water valve

There will be a relatively large noise when the solenoid valve is switched on and off, and the on-off control of the solenoid valve is directly related to the water level detection. The water level detection scheme adopted will cause the high water level to fluctuate due to the surface tension of the water and the fluctuation of the water surface when the water surface has just reached the high water level, which will cause the solenoid valve to keep switching off. Therefore, it is considered that when the solenoid valve is open, start timing until 30 seconds before checking the water level, so that the water level has stabilized and the vibration of the solenoid valve is avoided.

However, this may cause the insulated water tank to not be closed in time when the water level is high, causing water to overflow. By observing the flow rate of water flowing through the valve many times, it is found that the high water level line of the thermal insulation tank can be properly lowered, which can basically ensure that the water will not overflow.

3. About the problem of jumping back to the standby state

In the standby state, if someone enters or breaks the hold state after adding water, it should return to the previous state. To solve this problem, first consider A: save the previous state, and jump to that state when the hold state is released. However, it does not make much sense to find such a save, because in most states there is no need to save the previous state, and more importantly, it is very likely that the situation has changed during standby, such as changes in water level, temperature change, so simply going back to the previous state is not ideal. Consider option B instead: Design a general state, which is specially used to determine what state the system should enter now. In this way, every time the state jumps, other states jump to the general state, and then jump from the general state to the next state. Such a design is based on such a system that does not require high state transition speed. At the same time, this design also solves the problem of transitioning to the standby state. Can quickly jump to the general state, so as to select the correct state.

Claims (3)

1. a health energy-saving drinking water machine is characterized in that this water dispenser comprises three orders water tank that is connected in series and the pipeline that is connected these three water tanks and heat insulation function is arranged, and has many grades of adjustable water-saving temp control system devices; Wherein, first water tank (1) is a water inlet end, is used to adorn the unboiled water that did not burn; Second water tank (2) is used to boil water, and the unboiled water that directly will inject water tank in the use is boiled, and next water filling is waited for regard to deenergization in boiled back; Three-tank (3) is provided with delivery port, and heat insulation function is arranged, and has many grades of adjustable water-saving temp control system devices, with regard to the boiled water of suction, is used to satisfy the demand of user to different water temperatures when water level is discontented; Transmission control unit (TCU) spare from cold water area to boiling water district water is a miniature immersible pump, is magnetic valve from the boiling water district to the transmission control unit (TCU) spare of warm water district water; Heat insulation function is arranged, and have the work that many grades of adjustable water-saving temp control system devices are controlled whole water dispenser automatically;

Described controller comprises:

Main control module: select for use programmable logic device (CPLD) to be used for formation, the output of collection, logical process and the control signal of all signals of system, realize each duty switching of water dispenser;

Messenger's detection module: utilize the optoelectronic switch collection whether to have the signal of people's process to be transferred to CPLD and carry out logic analysis;

The water level detecting module: the water level place that limits in each water tank inserts metal probe, utilizes the dividing potential drop of water and big resistance resistance, judges whether to specify water level; Each water tank is all exported two and is indicated the signal of high and low water level to give CPLD respectively;

Water temperature detection module: use the directly integrated temperature sensor chip of output digital quantity, communicate with CPLD and be met the temperature that needs precision;

Relay control module: CPLD control output high-low level amplifies through triode, and as the control signal of control relay, the 220V ac working power supply of control reservoir, boiler, immersible pump determines whether it works; In addition, also add relay in magnetic valve direct current 12V working power loop, whether the relay control signal that CPLD provides controls magnetic valve work after amplifying;

Human-computer interaction module: receive the control signal that comes from CPLD, by liquid crystal display and color LED visual display system work at present state; Feed back signal to CPLD initialization system duty by the plurality of keys on the panel.

2. health energy-saving drinking water machine according to claim 1 is characterized in that in the described controller:

The water level detecting module: water level probe connects lead, and through electric resistance partial pressure and comparator LM339, comparator output connects the IO mouth of main control module CPLD, provides each water tank current water level signal to CPLD, represents the high and low water level signal of three water tanks respectively;

The water temperature detection module: numeric type temperature sensor DS18B20 adopts the 1-Wire interface, and this data wire connects the I/O mouth of main control module CPLD, the real-time digital temperature data is provided for the CPLD chip;

Messenger's detection module: photoelectric sensor output signals is judged back output high-low level through comparator LM339, inserts main control module CPLD chip I mouth, and is close to have judged whether the people;

Relay control module: whether information reaches default control logic generation control output signal to main control module CPLD according to the water temperature of importing, water level, messenger, after triode amplifies as the control input signal of each relay of relay control module, the 220V ac working power supply and the magnetic valve 12V dc supply of control reservoir, boiler, immersible pump determine whether it works;

Human-computer interaction module: the color LED indicator lamp of vivid displays temperature directly links to each other with the I/O mouth of main control module CPLD, and demonstration, flicker, do action are directly controlled by CPLD; All demonstration information of Liquid Crystal Module directly provide by the CPLD chip, and the signal of input button is directly connected to the external I/O port of CPLD, and directly input signal gives CPLD as control signal.

3. health energy-saving drinking water machine according to claim 1 and 2 is characterized in that the control logic of main control module CPLD in the described controller is:

Controller main control module CPLD input signal has: 1) unboiled water district, the thermal treatment zone and the high and low signal of heat preservation zone water level; 2) temperature feedback signal of the temperature detection chip DS18B20 of attemperater and boiler; 3) messenger's detection signal of messenger's detection module photoelectric sensor; 4) the Reset button on the user interactions panel, Force button, Smart button, SetDown button, SetUp push button signalling;

Output signal has: 1) heating water tank heating signal; 2) attemperater heating signal; 3) immersible pump control signal; 4) solenoid control signal; 5) liquid crystal display mode block control signal; 6) running lamp control signal;

The state machine theory is adopted in the control logic design of controller main control module CPLD, realized a multi-input multi-output system, according to system's operation characteristic, system running state is divided into 4 kinds: the state that reports an error, holding state, intelligent heat preserving state, pressure heated condition;

The state of reporting an error appears at system and occurs comprising: 1) detect the high water level signal and do not detect the low water level signal for same water tank under the wrong situation; 2) temperature detection shows long-time above 100 ℃;

Under the state of reporting an error, running lamp goes out entirely, immersible pump cuts out, the heating of closed electromagnetic valve, attemperater is closed, the heating water tank heating is closed, the liquid crystal display status bar shows error, and system jumps to the intelligent heat preserving state from error condition can only exchange Reset button on the panel by the user;

Holding state appears under the following situation, comprising: it is unmanned that 1) messenger's detection signal surpasses lasting expression in a hour; 2) three cistern water levels detections are low entirely;

Under holding state, running lamp goes out entirely, immersible pump cuts out, the heating of closed electromagnetic valve, attemperater is closed, the heating water tank heating is closed, the liquid crystal display status bar shows Hold, and system from the condition that holding state jumps to the intelligent heat preserving state is: 1) messenger's detection signal transition table is shown with people's signal; 2) add water in the unboiled water district and change three situations that water tank all is low water levels;

When forcing heated condition to appear at system to be in the intelligent heat preserving state, the user presses after the Force key;

Forcing under the heated condition, attemperater heats with all strength, the liquid crystal display status bar shows Force, and heating water tank, immersible pump and magnetic valve are all followed the working method under the intelligent heat preserving state;

System from the condition that holding state jumps to the intelligent heat preserving state is: 1) user presses the Smart key on the lower panel; 2) temperature detection of attemperater arrives 80 ℃;

Except holding state, the state that reports an error, pressure heated condition, system all is in the intelligent heat preserving state;

The intelligent heat preserving state is divided into two kinds of mode of operations according to boiling water district water is whether boiled;

Mode of operation one: the boiling water district is boiled

Heating water tank does not heat:

The attemperater detected temperatures is higher than and maintains temperature that the user sets or heat preservation zone water level when low, and attemperater does not heat, if the attemperater detected temperatures is lower than user's design temperature and heat preservation zone water level when not being low, and the attemperater heating,

Running lamp is fixing to be shown, according to Heating Zone Temperature, the high more small cup of temperature number is many more,

Immersible pump closes,

Under the discontented situation of attemperater, open the magnetic valve water that heating water tank is boiled and add the warm water district, full or boiling water district water level is low up to warm water district water level,

When unboiled water district water level was low, system prompt added water, and the prompt column on the liquid crystal display shows " Add ",

Continue to keep this state 24 hours, system prompt changes water, and the prompt column on the liquid crystal display shows " Change ",

If boiling water district water level is low, then refresh boiled signal;

Mode of operation two: the boiling water district is not boiled

Continue heating when the heating water tank water level is not low,, provide boiled signal if the heating water tank temperature detection continues 30 seconds more than 95 ℃,

The attemperater detected temperatures is higher than and maintains temperature that the user sets or heat preservation zone water level when low, and attemperater does not heat; If the attemperater detected temperatures is lower than user's design temperature and heat preservation zone water level when not being low, the attemperater heating;

Running lamp rolls to glimmer and allows user's visual sense heating water tank in work, and according to Heating Zone Temperature, the high more small cup of temperature number is many more,

Magnetic valve closes,

Under the discontented situation of heating water tank, open the water suction heating water tank of immersible pump with the unboiled water district, full or the cold water area water level is low until heating water tank,

When unboiled water district water level was low, system prompt added water, and the prompt column on the liquid crystal display shows " Add ".

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