CN110715452B

CN110715452B - Control system of full-function water heater

Info

Publication number: CN110715452B
Application number: CN201810768612.3A
Authority: CN
Inventors: 来伟为
Original assignee: Guangzhou Zhongnan Mechatronics Engineering Co ltd
Current assignee: Guangzhou Zhongnan Mechatronics Engineering Co ltd
Priority date: 2018-07-13
Filing date: 2018-07-13
Publication date: 2021-06-29
Anticipated expiration: 2038-07-13
Also published as: CN110715452A

Abstract

The invention discloses a control system of a full-function water heater, which comprises a hot water heat-preservation water tank with a temperature transmitter and a water level transmitter, a constant-temperature water return device, a constant-pressure water supply device, a water supplementing system, an air energy heating device, a heat recovery heating device, a solar energy heating device and a main controller which is connected with the temperature transmitter and the water level transmitter in the hot water heat-preservation water tank in real time to control the hot water heat-preservation water tank to realize the functions of constant-temperature water return operation, constant-pressure water supply operation, water supplementing operation and air energy heating operation, the main controller is provided with three communication interfaces, the first communication interface is in communication connection with a touch screen of a system human-computer interface, the second communication interface is connected with an expansion module and an intelligent electric meter through a selection switch, and the selection switch can realize the communication of the expansion module and the main controller independently or the communication of the intelligent electric meter and the main controller independently or the communication of the expansion module and the intelligent electric meter and the main controller simultaneously. The invention has high operation reliability and reduced cost.

Description

Control system of full-function water heater

Technical Field

The invention relates to the technical field of hot water control, in particular to a control system of a full-function water heater.

Background

The water heater is a device which can increase the temperature of cold water into hot water in a certain time by various physical principles. According to different principles, the water heater can be divided into an electric water heater, a gas water heater, a solar water heater, a magnetic water heater, an air energy water heater, a heating water heater and the like. The water heater has the advantages of high heat efficiency, high heating speed, stable temperature regulation, continuous use by multiple persons and a batch of fixed consumers. Hot water can be supplied at any time in a kitchen in winter, so that convenience is brought; the water temperature is constant, and the purchase cost is low. Generally, a household uses 8 liters of machines enough, so the household is very popular, with the continuous development of science and technology, the functional requirements on the water heater are more and more, with the increase of functions, the control system of hot water is relatively complex and difficult to control, and because each device in the control system of the water heater at present works independently, the information during the work can not be shared or coordinated, so the cost is relatively high, and the operation reliability is relatively poor, so the improvement is needed.

Disclosure of Invention

The present invention is to provide a control system of a full-function water heater to solve the above-mentioned deficiencies of the prior art.

In order to achieve the purpose, the control system of the full-function water heater comprises a hot water heat-preservation water tank with a temperature transmitter and a water level transmitter inside, a constant-temperature water return device, a constant-pressure water supply device, a water supplementing system, a heat recovery heating device, a solar heating device and an air heating device which are respectively connected with the hot water heat-preservation water tank, and a main controller which is connected with the temperature transmitter and the water level transmitter in the hot water heat-preservation water tank in real time to control the hot water heat-preservation water tank to realize functions of constant-temperature water return operation, constant-pressure water supply operation, water supplementing operation and air heating operation, wherein the main controller is provided with three communication interfaces, the first communication interface is in communication connection with a touch screen of a system human-computer interface, the second communication interface is connected with an expansion module and an intelligent ammeter through a selection switch, and the third communication interface is in communication connection with, the selection switch is capable of realizing the independent communication between the selection expansion module and the main controller or the independent communication between the intelligent electric meter and the main controller or the simultaneous communication between the expansion module and the intelligent electric meter and the main controller.

Further, the water charging system comprises two water pumps or electromagnetic valves selectively installed according to automatic water supply or passive water supply and a Hall flow sensor for detecting water supply flow, the Hall flow sensor is connected with the water pumps or electromagnetic valves in series and then connected to the hot water heat-preservation water tank, the water pumps or electromagnetic valves are connected with the main controller, the constant-pressure water supply equipment comprises a low-region water supply system and a high-region water supply system, the low-region water supply system comprises a low-region water supply pipe connected with the hot water heat-preservation water tank, a low-region water supply pressure transmitter and two low-region processing water pumps connected in parallel are sequentially connected between the low-region water supply pipe and the hot water heat-preservation water tank, the high-region water supply system comprises a high-region water supply pipe connected with the hot water heat-preservation water tank, and a high-region water supply pressure transmitter and two high-region processing water pumps connected in parallel, the high-region water supply pressure transmitter, the high-region processing water pump, the low-region water supply pressure transmitter and the low-region processing water pump are connected with the main controller; the constant-temperature water return equipment comprises a low-region water return system and a high-region water return system, wherein the low-region water return system comprises a low-region water return pipe connected with a hot water heat-preservation water tank, a low-region water return temperature transmitter and two low-region water return electromagnetic valves connected in parallel are sequentially connected between the low-region water return pipe and the hot water heat-preservation water tank, the high-region water return system comprises a high-region water return pipe connected with the hot water heat-preservation water tank, a high-region water return temperature transmitter and two high-region water return electromagnetic valves connected in parallel are sequentially connected between the high-region water return pipe and the hot water heat-preservation water tank, and the high-region water return temperature transmitter, the high-region water return electromagnetic valves, the low-region water return temperature; the air energy heating equipment comprises more than one air energy water heater which is in control connection with the main controller, and the air energy water heater is connected with the hot water heat-preservation water tank through a water pipe.

Furthermore, the main controller is also in communication connection with other solar heat source equipment which is connected with a hot water heat-preservation water tank to realize heat supply.

Further, the control method of the control system of the full-function water heater comprises the following steps:

s1, a water replenishing method: the system is selectively installed according to automatic water supply or passive water supply, when the system is used for supplementing water through tap water, only 2 electromagnetic valves need to be installed, and when no tap water needs to be pumped, 2 water pumps need to be installed for pumping water to supplement water; when water is needed, recording the water supplement amount of each hour by using the Hall flow sensor, and sending the water supplement amount to the main controller, wherein the main controller obtains the water consumption amount of each hour or the water supplement amount of each day, obtains the water consumption amount of each day and stores the water consumption amount; the water supply system is characterized in that two water pumps or electromagnetic valves are respectively arranged to finish one use, water is supplied in a standby mode, one water pump or electromagnetic valve is started to supply water when water is required to be supplied, the water supply system is stopped when the water supply system does not reach a limit value, and the other water pump or electromagnetic valve is started when water is required to be supplied next time; meanwhile, the water pump or the electromagnetic valve can also acquire the temperature of the water tank in real time through a temperature transmitter in the hot water heat-preservation water tank to control the on-off condition of water supplement;

s2, a constant-pressure water supply method: the water supply system can realize timing water supply, when the water supply is started, the corresponding booster pumps start to work, pressure conversion conditions of corresponding pipelines are monitored by using pressure transmitters of water pump outlets corresponding to a low-region water supply system or a high-region water supply system, the pressure conversion conditions are compared with set target pressure, then output power of the corresponding water pumps is obtained through PID operation, a main controller controls frequency converters on the water pumps corresponding to the low-region water supply system or the high-region water supply system to output corresponding power, and meanwhile, the two booster pumps are mutually standby for use;

s3, constant-current water return method: after the water in the pipeline of the low-region water return system or the high-region water return system is cooled, a water return electromagnetic valve on the corresponding low-region water return system or the high-region water return system is automatically opened, cold water in the pipeline flows back into a water tank to be heated, hot water comes from a water tap of a user, when a pressure water pump on the low-region water return system or the high-region water return system starts to supply water, a return water temperature transmitter on the low-region water return system or the high-region water return system monitors the temperature to be compared with the set temperature, when the temperature is lower than the set temperature, a water return electromagnetic valve on the corresponding pipeline of the low-region water return system or the high-region water return system is opened, the electromagnetic valves on the low-region water return system or the high-region water return system are closed when the temperature is higher than the set temperature, meanwhile, the two electromagnetic valves, the main controller estimates that the electromagnetic valve is possible to be in fault, and the other electromagnetic valve is forcibly started;

s4, heating methods of all water heaters: when the water temperature in the hot water heat-preservation water tank is lower than the set water temperature, the main controller gives a closing signal to the first water heater after 30 seconds to enable the water heaters to work, and then one water heater is added to work at intervals until all the water heaters work, so that the heating function is started at intervals;

and S5, connecting the main controller with the electronic equipment on each equipment to acquire signals of each equipment in real time to control the operation steps of constant-temperature water return, constant-pressure water supply, water supplement and air energy heating.

The control system of the full-function water heater solves the problems that each device of the traditional hot water control system works independently, information during working cannot be shared or coordinated, all the devices are coordinated to work, energy is saved, the operation reliability is high, remote control can be realized, and the cost is reduced.

Drawings

FIG. 1 is a structural connection diagram of a hot water holding water tank and an external system in a control system of a full function water heater in embodiment 1;

FIG. 2 is a connection diagram of the main controller connected to other devices in the control system of the full-function water heater in embodiment 1;

FIG. 3 is a structural connection diagram in the case where a water replenishing part in embodiment 1 employs a water pump;

FIG. 4 is a structural connection diagram of a constant pressure water supplying apparatus in embodiment 1;

FIG. 5 is a structural connection diagram of a constant-temperature water returning apparatus in embodiment 1;

fig. 6 is a structural connection diagram of the air energy heating apparatus in embodiment 1.

In the reference symbols: 1. a hot water heat preservation water tank; 2. a temperature transmitter; 3. a water level transmitter; 4. a constant temperature water return device; 5. a constant pressure water supply device; 6. a water replenishing system; 7. an air energy heating device; 9. a main controller; 10. a communication interface; 11. a touch screen; 12. an expansion module; 13. a smart meter; 14. a selector switch; 15. a Hall flow sensor; 16. a water pump; 17. an electromagnetic valve; 18. a low-region water supply pipe; 19. a low-region water supply pressure transmitter; 20. a water pump is processed in a low area; 21. a high-region water supply pipe; 22. a high-region water supply pressure transmitter; 23. processing a water pump in a high area; 24. a low-region water return pipe; 25. a low-region water return electromagnetic valve; 26. a high-region water return pipe; 27. a high-region water return electromagnetic valve; 28. a low-region return water temperature transmitter; 29. a high-region return water temperature transmitter; 30. an air energy water heater; 31. a system human-computer interface; 32. a heat recovery heating device; 33. a solar heating device.

Detailed Description

The invention creation is preferably described below with reference to the examples.

Example 1:

as shown in fig. 1-6, the control system of a full-function water heater provided in this embodiment includes a hot water thermal insulation water tank 1 with a temperature transmitter 2 and a water level transmitter 3 inside, a constant temperature water return device 4, a constant pressure water supply device 5, a water supply system 6, a heat recovery heating device 32, a solar heating device 33, and an air heating device 7 connected to the hot water thermal insulation water tank 1, and further includes a main controller 9 connected to the temperature transmitter 2 and the water level transmitter 3 in the hot water thermal insulation water tank 1 in real time to control the hot water thermal insulation water tank 1 to implement functions of constant temperature water return operation, constant pressure water supply operation, and air heating operation, three communication interfaces 10 are provided on the main controller 9, wherein the first communication interface 10 is in communication connection with a touch screen 11 of a system human-machine interface 31, the second communication interface 10 is connected to an expansion module 12 and an intelligent electric meter 13 through a selection switch 14, the third communication interface 10 is connected with a third party for controlling communication, and the selection switch 14 is a selection switch 14 which can realize the communication of the selection expansion module 12 and the main controller 9 or the communication of the intelligent electric meter 13 and the main controller 9 or the communication of the expansion module 12 and the intelligent electric meter 13 and the main controller 9 at the same time.

Further, the water charging system 6 includes two water pumps 16 or solenoid valves 17 selectively installed according to automatic water supply or passive water supply and a hall flow sensor 15 for detecting water supply flow, the hall flow sensor 15 is connected to the hot water heat-preserving water tank 1 after being connected in series with the water pumps 16 or solenoid valves 17, the water pumps 16 or solenoid valves 17 are connected to the main controller 9, the constant pressure water supply equipment 5 includes a low region water supply system and a high region water supply system, the low region water supply system includes a low region water supply pipe 18 connected to the hot water heat-preserving water tank 1, a low region water supply pressure transmitter 19 and two low region processing water pumps 20 connected in parallel are sequentially connected between the low region water supply pipe 18 and the hot water heat-preserving water tank 1, the high region water supply system includes a high region water supply pipe 21 connected to the hot water heat-preserving water tank 1, and a high region water supply pressure transmitter 22 and two high region processing water pumps connected in parallel are sequentially connected between the high region water supply pipe 21 The water pump 23, and the high area water supply pressure transmitter 22, the high area processing water pump 23, the low area water supply pressure transmitter 19 and the low area processing water pump 20 are connected with the main controller 9; the constant-temperature water return equipment 4 comprises a low-region water return system and a high-region water return system, the low-region water return system comprises a low-region water return pipe 24 connected with the hot water heat-preservation water tank 1, a low-region water return temperature transmitter 28 and two low-region water return electromagnetic valves 25 connected in parallel are sequentially connected between the low-region water return pipe 24 and the hot water heat-preservation water tank 1, the high-region water return system comprises a high-region water return pipe 26 connected with the hot water heat-preservation water tank 1, a high-region water return temperature transmitter 29 and two high-region water return electromagnetic valves 27 connected in parallel are sequentially connected between the high-region water return pipe 26 and the hot water heat-preservation water tank 1, and the high-region water return temperature transmitter 29, the high-region water return electromagnetic valves 27, the low-region water return temperature transmitter 28 and the low; the air energy heating equipment 7 comprises more than one air energy water heater 30 which is in control connection with the main controller, and the air energy water heater 30 is connected with the hot water heat-preservation water tank 1 through a water pipe.

Furthermore, the main controller 9 is also connected with other solar heat source equipment which is connected with the hot water heat-preservation water tank 1 to realize heat supply.

as shown in fig. 3, S1, the water replenishing method: the installation is selected according to automatic water supply or passive water supply, when the system is used for supplementing water through tap water, only 2 electromagnetic valves 17 need to be installed, and when no tap water needs to be pumped, 2 water pumps 16 need to be installed for water pumping to supplement water; when water is needed, the Hall flow sensor 15 is used for recording the water supplement amount of each hour and sending the water supplement amount to the main controller 9, and the main controller obtains the water consumption of each hour or the water supplement amount of each day, obtains the water consumption of each day and stores the water consumption; meanwhile, two water pumps 16 or electromagnetic valves 17 are respectively arranged to finish one use, water is supplied in a standby mode, when water is required to be supplied, one water pump 16 or electromagnetic valve 17 is firstly started to supply water, the water supply is stopped when the water supply is not up to a limit value, and when the water supply is required again next time, the other water pump 16 or electromagnetic valve 17 is started; meanwhile, the water pump 16 or the electromagnetic valve 17 can also acquire the temperature of the water tank in real time through the temperature transmitter 2 in the hot water heat-preservation water tank 1 to control the on-off condition of water supplement; in the specific embodiment, when tap water is adopted for supplying water, the water pump 16 can be replaced by the electromagnetic valve 17;

as shown in fig. 4, S2, constant pressure water supply method: the water supply system can realize timing water supply, when the water supply is started, the corresponding booster pumps start to work, pressure conversion conditions of corresponding pipelines are monitored by using pressure transmitters of water pump outlets corresponding to a low-region water supply system or a high-region water supply system, the pressure conversion conditions are compared with set target pressure, then output power of the corresponding water pumps is obtained through PID (proportion integration differentiation) operation, a main controller 9 controls frequency converters on the water pumps corresponding to the low-region water supply system or the high-region water supply system to output corresponding power, and meanwhile, the two booster pumps are mutually overlapped for use;

as shown in fig. 5, S3, constant-flow water returning method: after the water in the pipeline of the low-region water return system or the high-region water return system is cooled, a water return electromagnetic valve on the corresponding low-region water return system or the high-region water return system is automatically opened, cold water in the pipeline flows back into a water tank to be heated, hot water comes from a water tap of a user, when a pressure water pump on the low-region water return system or the high-region water return system starts to supply water, a return water temperature transmitter on the low-region water return system or the high-region water return system monitors the temperature to be compared with the set temperature, when the temperature is lower than the set temperature, a water return electromagnetic valve on the corresponding pipeline of the low-region water return system or the high-region water return system is opened, the electromagnetic valves on the low-region water return system or the high-region water return system are closed when the temperature is higher than the set temperature, meanwhile, the two electromagnetic valves, the main controller 9 predicts that the electromagnetic valve may be in failure, and the other electromagnetic valve is forcibly started;

as shown in fig. 6, S4, heating method of all water heaters: when the temperature of water in the hot water heat-preservation water tank 1 is lower than a set temperature, the main controller gives a closing signal to the first water heater after 930 seconds, so that the water heaters work, and then one water heater can work at intervals until all the water heaters work, so that the heating function is started at intervals;

s5, the main controller 9 is connected with the electronic equipment on each equipment to acquire the signal of each equipment in real time to control the operation steps of constant temperature water return, constant pressure water supply, water supplement and air energy heating.

Because the number of the heating devices controlled by each hot water system is different, the design of the embodiment adopts a main controller 9+ an expansion module + an intelligent electric meter, when the number of the hot water system air energy devices is less than 15, and the number of other heat sources is less than 3, the whole system can be controlled by adopting the main controller 9 (so as to reduce the cost of the controller and the space occupation of an electric box), if the expansion module is added, the number of the hot water system air energy devices can reach 15, and when the number of other heat source stations can reach 10, if the energy consumption of the system needs to be calculated, the intelligent electric meter can be accessed (after the intelligent electric meter is accessed, the system can calculate the power consumption condition of each ton of hot water so as to judge whether the system is energy-saving). Main control unit 9 has 3 communication ports, the first communicates with this system touch-sensitive screen, the second can with expansion module 12 and ammeter communication need with certain equipment communication occasionally select switch, optional arbitrary, also can two all select, also can two all do not select, because main control unit 9 is when communicating with the equipment that this system does not exist, can not obtain the response of corresponding equipment, can wait for 1 second at every turn, system communication efficiency has been reduced), the third reserves the communication for third party control (make things convenient for this system of property side remote monitoring, adopt international standard MODBUS-RTU communication protocol).

In this embodiment, each analog channel input of the main controller 9 adopts 4-20ma current sensors, which increases the accuracy of analog acquisition to the maximum extent (analog signals have 3 types, 1 type is current signal, 1 type is voltage signal, and 1 type is resistance signal, the voltage signal has the disadvantage that the voltage drop is generated when the wire of the sensor is too long, which results in the module receiving incorrect signals, the signal of the resistance has the disadvantage that the wire of the sensor is too long, which also generates resistance, thus, the module receives incorrect signals, only current signals are adopted, no matter how long the connecting wire is, the signals acquired by the sensors keep the corresponding current generated on the connecting wire, the current has a characteristic, that is, the currents of all devices on a loop are equal, so that the signals received by the module do not generate errors), each way of analog quantity measuring range is adjustable, each way of sensor according to different measuring ranges can be ensured, correct numerical value feedback can be obtained as long as the measuring range of the sensor is set, and 2-bit decimal points are reserved for numerical values, namely when the temperature of the sensor takes degree as a unit, the output temperature precision is 0.01 degree.

Water supplement system:

the main equipment comprises 3 Hall flow sensors and 2 water pumps or electromagnetic valves (when tap water is supplemented, only 2 electromagnetic valves are needed to be installed to control the water to enter, when no tap water is available, 2 water pumps are needed to be installed to supplement water, therefore, the water supplementing equipment is marked as a water pump or an electromagnetic valve, the flow sensors are used for recording the water supplementing amount of each hour when a system uses water to obtain the water consumption of each hour or daily water supplementing amount, obtaining the daily water consumption and storing the daily water consumption in a historical record form, analyzing in a later period to obtain an estimate of the water consumption of each period in one year, and when the estimate is obtained, the heating equipment has a target value for heating water, the water in a water tank does not need to be fully boiled every day to achieve the purpose of energy saving, particularly when solar energy or other heat sources are free, when the free heat source is enough for the consumption of hot water today, no energy is needed to heat the water. Another purpose of the flow sensor is to calculate the total amount of water supplement and the total amount of power consumption, and obtain the actual power consumption per ton of water to evaluate whether the system is energy-saving. The starting of the water replenishing pump is also a strategy, 2 water pumps are in a one-use one-standby relation, when water is required to be replenished, the water replenishing is started by the No. 1 water pump firstly, the water replenishing is stopped when the water is not up to a limit value, and when the water is required to be replenished next time, the No. 2 water pump is started, and the 2 water pumps interact in the form, so that each device is ensured to work, and the standby pump is prevented from rusting and damaging after being stopped for a long time; the water replenishing pump can interact with an external heat source according to time, when water is used at night, if the system has solar energy, water is not replenished at night, when the water level is very low, water is replenished in a proper amount, the water is sufficient, when the water level is in the daytime, solar energy is utilized to produce water, according to the solar energy condition, the water level and the water temperature in the water tank are monitored every hour, when the water temperature and the water temperature reach the standard, air can not be subjected to auxiliary heating and water replenishing, when the water temperature and the water level do not reach the standard in every hour, less water is replenished, and the temperature is lowered by the air and can be subjected to auxiliary heating, so that the water level and the water temperature standard in the current period are. Therefore, the solar energy is used for heating as much as possible, and the air energy is used for heating as little as possible, so that the aim of saving energy is fulfilled. The water replenishing pump can also interact according to the temperature in the water tank, when hot water for bathing is about 42 ℃, water is directly replenished, when the temperature of the water in the water tank is lower than 45 ℃, the system stops replenishing water, and water is replenished when the temperature of the water rises to be higher than 45 ℃ so as to reach the temperature which influences the water in the water replenishing process.

When the water level is already ultra-low, if the water level is low again, air energy faults can be caused, and at the moment, in order to protect the air energy, the water supplement is not limited by the temperature and is directly supplemented to the proper water level. When the water replenishing pump starts one pump for replenishing water, after a certain time, and the water level does not reach a target value, the system is suspected that the equipment breaks down, and the other water replenishing pump is started to work, so that the reliable operation of the system is ensured.

A water supply system:

for supplying water to high and low areas, considering that some buildings are high, if 1 set of water supply system is adopted, in order to ensure the water pressure of water for high-rise buildings, the water pressure of the low area may be too high, generally about 10 layers can be 1 water supply system, if a building has 20 layers, the hot water tank is on the top of the building, the water pressure of the water for general use is 2.5bar, if one set of water supply system, the water pressure of the water for users at 20 layers is 2.5bar if a pressure water pump pressurizes the water pressure to 2.5bar, the water pressure of the water for users at 20 layers is 0.3bar if the height of the building is 3 meters, the water pressure of the water for users at 10 layers is 5.5bar, the water pressure of users at 1 layer is 8.5bar, the water pressure of water for users at 1-10 layers is too high, and if 1-10 layers are divided into low areas for supplying water, even if the water is not pressurized, the water pressure for users at 10 layers is 3bar, thereby being very suitable for, the purpose of installing the pressurizing water pump in the low area is that when the temperature of water in the main pipeline is low, cold water in the pipeline is pressed back to the water tank by a power to be heated, and a user can have hot water through a water boiling faucet.

The control logic will be described below with respect to high-area water supply, and the main controller 9 has a timing function for water supply, and can freely set any time of day to start water supply or stop water supply, and each time can set 7 time periods, or can time water supply in weeks, for example: schools and projects need to supply water regularly every day, 19-23 o 'clock water at every night, 6-9 o' clock water at morning and no water at other time, so that the purpose of energy saving is achieved, and daily timing can be adopted; when some office buildings need water supply at a certain time from Monday to Friday, water supply is not needed for Saturday or the water supply time is different, and the weekly timing can be adopted.

When beginning to supply water, the force (forcing) pump begins work, the transform of pressure is monitored to pressure transmitter at the water pump export, compare with the target pressure of settlement, through PID operation, obtain the output power of water pump, main control unit 9 can tell the water pump converter, let the converter output to the power, guarantee that the water pressure of water pump export keeps the pressure value that we set for all the time, 2 water pumps are reserve each other, also superpose each other, when a water pump trouble, another water pump will mend with higher speed, when a water pump can not support terminal water use, another can superpose, 2 water pumps can switch the priority once at a period of time, guarantee that the operating time of 2 water pumps is the same length.

A water return system:

the water return system ensures that the water return electromagnetic valve can be automatically opened after the water in the hot water pipeline is cooled in the water using time, so that the cold water in the pipeline flows back into the water tank to be heated, and a user can have hot water to come once a water boiling faucet (instead of hot water coming after the cold water in the pipeline is completely discharged). The control principle is that when the pressure water pump starts to supply water, the temperature monitored by the backwater temperature transmitter is compared with the set temperature, the backwater electromagnetic valve is opened when the temperature is lower than the set temperature, the electromagnetic valve is closed when the temperature is higher than the set temperature, 2 electromagnetic valves are mutually standby and are switched to work, after one electromagnetic valve is opened and waits for a period of time, when the temperature does not reach a target value, the system predicts that the electromagnetic valve possibly breaks down, and the other electromagnetic valve is forcibly started.

The air energy control system:

one set of air energy heating system can have a plurality of air energy water heating machines, but basically no more than 15 air energy water heating machines, so that the main controller 9 can basically cover all the air energy water heating systems. The main controller 9 controls the start and stop of the water heater through the switching value, and detects whether the equipment is faulty or not through the switching value, so the set of control system can control all the air energy water heaters in the market, for example, some brands provide communication protocols, and more detailed parameters of the water heaters can be controlled through the protocols.

When the water temperature in the water tank is lower than the set water temperature, the main controller 930 seconds later gives a closing signal to the first water heater to enable the water heater to work, then one water heater can be added to work at intervals (the starting interval time can be set by itself) until all 15 water heaters work, so that the purpose of starting the water heater is to avoid starting 15 devices at one time to bring impact to a power grid, and when the water temperature reaches the set value, the 15 devices are closed in sequence. (when the quantity of the switch is controlled by the device, the set temperature of the air energy device is required to be adjusted to the highest temperature, and the switch quantity is remotely used for controlling the start and stop of the water heater).

Control systems of other solar heat source apparatuses:

other heat sources generally refer to free heat sources, such as solar energy, air conditioner heat recovery, air compressor heat recovery, steam heat recovery and the like, except for a system in a glass fiber reinforced plastic form, other systems can be heated in a direct heating form, a circulating pump or a water replenishing electromagnetic valve is started when a temperature sensor at the outlet of a heating system detects that the water temperature reaches a set temperature, the minimum electric energy is used, the heated water is directly discharged into a heat preservation water tank, and the glass fiber reinforced plastic can burst when the temperature difference of the glass fiber reinforced plastic is large. Circulating thermal working logic: the outlet temperature of using other heat sources contrasts with the water tank temperature, start circulating water pump when being greater than 8 ℃ (temperature is adjustable), stop equipment when being less than 2 ℃ (temperature is adjustable), two water pumps switch over the operation each other, reserve each other, guarantee system safety operation, when the water tank temperature exceeds the setting value, and the water level is less than the highest water level, begin the moisturizing, the temperature is less than the setting value or the water level stops the moisturizing when exceeding the highest water level, stop heating the circulating pump when the temperature exceeds the highest temperature limit value in the water tank, guarantee that the temperature in the water tank is controllable. Direct heating working logic (water supplement and heat preservation water tank): comparing the outlet temperature of other heat sources with the set temperature, starting the circulating water pump when the outlet temperature of other heat sources is higher than the set temperature, stopping the circulating water pump when the outlet temperature of other heat sources is lower than the set temperature, switching the two water pumps to operate mutually for standby to ensure the safe operation of the system, starting water supplement when the temperature of the water tank exceeds the set value and the water level is lower than the highest water level, stopping water supplement when the temperature is lower than the set value or the water level exceeds the highest water level, and stopping heating the circulating pump when the temperature in the water tank exceeds the highest temperature limit value to ensure that the temperature in the water tank is controllable.

Direct heating working logic (water supplement is directly supplemented into other heat sources for heating): the outlet temperature of other heat sources is compared with the set temperature, when the outlet temperature of other heat sources is higher than the set temperature, the corresponding water replenishing electromagnetic valve is opened, cold water is injected into the interior of other heat sources, the heated water is pressed into the heat preservation water tank, when the outlet temperature of other heat sources is lower than the set temperature, the corresponding water replenishing electromagnetic valve is closed until the water level in the water tank exceeds the highest water level, after the water is replenished, if the water temperature in the water tank is lower than the set temperature, the circulating heating water pump can be started to circularly heat the water in the water tank to the set temperature, the two water pumps are mutually switched to operate and are mutually standby, the safe operation of the system is ensured, when the temperature in the water tank exceeds the highest temperature limit, the heating circulating pump is stopped, and the temperature in.

While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A control system of a full-function water heater comprises a hot water heat-preservation water tank (1) with a temperature transmitter (2) and a water level transmitter (3) inside, a constant-temperature water return device (4), a constant-pressure water supply device (5), a water supplementing system (6), a heat recovery heating device (32), a solar heating device (33) and an air energy heating device (7) which are respectively connected with the hot water heat-preservation water tank (1), and a main controller (9) which is connected with the temperature transmitter (2) and the water level transmitter (3) in the hot water heat-preservation water tank (1) in real time to control the hot water heat-preservation water tank (1) to realize functions of constant-temperature water return operation, constant-pressure water supply operation, water supplementing operation and air energy heating operation, wherein three communication interfaces (10) are arranged on the main controller (9), wherein the first communication interface (10) is in communication connection with a touch screen (11) of a human-machine interface, the second communication interface (10) is connected with an expansion module (12) and an intelligent electric meter (13) through a selector switch (14), the third communication interface (10) is in control communication connection with a third party, the selector switch (14) is a selector switch (14) which can realize the communication of the selection expansion module (12) and the main controller (9) or the communication of the intelligent electric meter (13) and the main controller (9) or the communication of the expansion module (12) and the intelligent electric meter (13) and the main controller (9) at the same time, the water supplementing system (6) comprises two water pumps (16) or electromagnetic valves (17) which are selectively installed according to automatic water supply or passive water supply and a Hall flow sensor (15) for detecting water supply flow, and the Hall flow sensor (15) is connected with the water pumps (16) or electromagnetic valves (17) in series and then is connected to the hot water heat preservation water tank (1), water pump (16) or solenoid valve (17) be connected with main control unit (9), constant pressure water supply equipment (5) including low district water supply system and high district water supply system, low district water supply system include low district delivery pipe (18) be connected with hot water holding water box (1), low district water supply pressure transmitter (19) and two parallelly connected low district processing water pumps (20) have connected gradually between low district delivery pipe (18) and hot water holding water box (1), high district water supply system include high district delivery pipe (21) be connected with hot water holding water box (1), high district water supply pressure transmitter (22) and two parallelly connected high district processing water pumps (23) have connected gradually between high district delivery pipe (21) and hot water holding water box (1), just high district water supply pressure transmitter (22), high district processing water pump (23), low district water supply pressure transmitter (19), The low-zone processing water pump (20) is connected with the main controller (9); the constant-temperature water return equipment (4) comprises a low-region water return system and a high-region water return system, the low-region water return system comprises a low-region water return pipe (24) connected with the hot water heat-preservation water tank (1), a low-region return water temperature transmitter (28) and two low-region return water electromagnetic valves (25) which are connected in parallel are sequentially connected between the low-region return water pipe (24) and the hot water heat-preservation water tank (1), the high-region water return system comprises a high-region water return pipe (26) connected with the hot water heat-preservation water tank (1), a high-region return water temperature transmitter (29) and two high-region return water electromagnetic valves (27) which are connected in parallel are sequentially connected between the high-region return water pipe (26) and the hot water heat-preservation water tank (1), the high-region backwater temperature transmitter (29), the high-region backwater electromagnetic valve (27), the low-region backwater temperature transmitter (28) and the low-region backwater electromagnetic valve (25) are connected with the main controller (9); the air energy heating equipment (7) comprises more than one air energy water heater (30) which is in control connection with a main controller, the air energy water heater (30) is connected with a hot water heat-preservation water tank (1) through a water pipe, and the main controller (9) is also in communication connection with other solar heat source equipment which is connected with the hot water heat-preservation water tank (1) to realize heat supply, and the control method of the control system of the full-function water heater is characterized by comprising the following steps:

s1, a water replenishing method: the water supply system is selectively installed according to automatic water supply or passive water supply, when the water is supplemented through tap water, only 2 electromagnetic valves (17) need to be installed, and when no tap water needs to be pumped, 2 water pumps (16) need to be installed for water supplement; when water is needed, the Hall flow sensor (15) is used for recording the water supplement amount of each hour and sending the water supplement amount to the main controller (9), and the main controller obtains the water consumption of each hour or the water supplement amount of each day, obtains the water consumption of each day and stores the water consumption; simultaneously, two water pumps (16) or electromagnetic valves (17) are respectively arranged to finish one use, water is supplied in a standby mode, when water is required to be supplied, one of the water pumps (16) or the electromagnetic valves (17) is firstly started to supply water, the water supply is stopped when a limit value is reached, and when water is required to be supplied again next time, the other water pump (16) or the electromagnetic valve (17) is started; meanwhile, the water pump (16) or the electromagnetic valve (17) can also acquire the temperature of the water tank in real time through the temperature transmitter (2) in the hot water heat-preservation water tank (1) to control the on-off condition of water supplement;

s2, a constant-pressure water supply method: the water supply system can realize timing water supply, when the water supply is started, the corresponding booster pumps start to work, pressure conversion conditions of corresponding pipelines are monitored by using pressure transmitters of water pump outlets corresponding to a low-region water supply system or a high-region water supply system, the pressure conversion conditions are compared with set target pressure, then output power of the corresponding water pumps is obtained through PID (proportion integration differentiation) operation, a main controller (9) controls frequency converters on the water pumps corresponding to the low-region water supply system or the high-region water supply system to output corresponding power, and meanwhile, the two booster pumps are mutually overlapped for use;

s3, constant-current water return method: after the water in the pipeline of the low-region water return system or the high-region water return system is cooled, a water return electromagnetic valve on the corresponding low-region water return system or the high-region water return system is automatically opened, cold water in the pipeline flows back into a water tank to be heated, hot water comes from a water tap of a user, when a pressure water pump on the low-region water return system or the high-region water return system starts to supply water, a return water temperature transmitter on the low-region water return system or the high-region water return system monitors the temperature to be compared with the set temperature, when the temperature is lower than the set temperature, a water return electromagnetic valve on the corresponding pipeline of the low-region water return system or the high-region water return system is opened, the electromagnetic valves on the low-region water return system or the high-region water return system are closed when the temperature is higher than the set temperature, meanwhile, the two electromagnetic valves, the main controller (9) predicts that the electromagnetic valve is possible to break down, and the other electromagnetic valve is started forcibly;

s4, heating methods of all water heaters: when the water temperature in the hot water heat-preservation water tank (1) is lower than the set water temperature, the main controller (9) gives a closing signal to the first water heater after 30 seconds to enable the water heater to work, and then one water heater is added to work at intervals until all the water heaters work, so that the heating function is started at intervals;

s5, the main controller (9) is connected with the electronic equipment on each equipment to acquire the signals of each equipment in real time to control the operation steps of constant-temperature water return, constant-pressure water supply, water supplement and air energy heating.