CN112393417A - Intelligent control's hot water boiler system - Google Patents
Intelligent control's hot water boiler system Download PDFInfo
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- CN112393417A CN112393417A CN201910744251.3A CN201910744251A CN112393417A CN 112393417 A CN112393417 A CN 112393417A CN 201910744251 A CN201910744251 A CN 201910744251A CN 112393417 A CN112393417 A CN 112393417A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 322
- 238000005485 electric heating Methods 0.000 claims description 66
- 238000010438 heat treatment Methods 0.000 claims description 61
- 239000012530 fluid Substances 0.000 claims description 28
- 230000002093 peripheral effect Effects 0.000 claims description 10
- 238000004891 communication Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 19
- 238000012546 transfer Methods 0.000 description 11
- 230000008859 change Effects 0.000 description 9
- 238000002474 experimental method Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000009826 distribution Methods 0.000 description 5
- 239000002918 waste heat Substances 0.000 description 5
- 230000003247 decreasing effect Effects 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241000273930 Brevoortia tyrannus Species 0.000 description 1
- 235000010627 Phaseolus vulgaris Nutrition 0.000 description 1
- 244000046052 Phaseolus vulgaris Species 0.000 description 1
- 238000003287 bathing Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005108 dry cleaning Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 235000021251 pulses Nutrition 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011232 storage material Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
- F24H1/12—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium
- F24H1/121—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium using electric energy supply
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1818—Arrangement or mounting of electric heating means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
- F24H9/2028—Continuous-flow heaters
Abstract
The invention provides an intelligent control hot water boiler system, wherein a third temperature sensor is arranged at a hot water inlet of hot water utilization equipment and used for measuring the temperature of hot water entering the hot water utilization equipment, the third temperature sensor is in data connection with a central controller, and the central controller automatically controls the valve opening degree of a second valve and the valve opening degree of a first valve according to the temperature detected by the third temperature sensor. Through the operation, when the temperature of hot water is high, after the hot water production requirement is met, redundant heat can be stored through the heat accumulator, when the temperature of hot water is low, more hot water can enter hot water utilization equipment to be utilized, the hot water requirement is ensured, and meanwhile, energy is saved.
Description
Technical Field
The invention relates to a boiler technology, in particular to hot water utilization equipment with a heat pipe with a novel structure.
Background
Hot water utilization equipment is mechanical equipment that utilizes the heat energy of fuel or other energy sources to heat water into hot water. The hot water utilization equipment has wide application field and is widely applied to places such as clothing factories, dry cleaning shops, restaurants, bunkers, canteens, restaurants, factories and mines, bean product factories and the like.
The existing hot water utilization equipment mostly adopts gas or fuel oil for heating, and the heating efficiency is low, but the research on the hot water utilization equipment utilizing waste heat is not much.
The existing hot water boiler is low in output efficiency, low in intelligent degree and incapable of performing intelligent control as required, so that the hot water boiler based on the hot water waste heat performing intelligent control is required to be designed.
Aiming at the problems, the invention is improved on the basis of the prior invention, and provides a hot water boiler system with a novel structure, which makes full use of heat sources, reduces energy consumption and realizes intelligent control.
Disclosure of Invention
In order to solve the problems, the invention is improved on the basis of the previous invention, and provides hot water utilization equipment with a new structure so as to realize full utilization of waste heat.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a hot water boiler system comprises a hot water boiler, hot water utilization equipment and a heat accumulator, wherein the hot water boiler is connected with a hot water pipe, the hot water pipe comprises a main pipe and an auxiliary pipe, the hot water utilization equipment is arranged on the main pipe, the heat accumulator is arranged on the auxiliary pipe, the main pipe and the auxiliary pipe form a parallel pipeline, hot water generated by the hot water boiler respectively enters the hot water utilization equipment and the heat accumulator of the main pipe and the auxiliary pipe, the hot water is heated by using the heat energy of the hot water in the hot water utilization equipment and is subjected to heat accumulation in the heat accumulator, the hot water is subjected to heat exchange in the hot water utilization equipment and the heat accumulator and then converges to enter a;
the system comprises a main pipe, a secondary pipe, a first valve, a second valve, a central controller and a control unit, wherein the main pipe is used for storing hot water, the secondary pipe is used for storing heat, the first valve is arranged at the inlet of the heat accumulator of the secondary pipe, the second valve is arranged at the position of an inlet of the hot water utilization equipment of the main pipe and used for controlling the flow of the hot water entering the hot water utilization equipment, the first valve is arranged at the position of an inlet pipe of the heat accumulator of the secondary pipe and used; the third temperature sensor is arranged at the position of a hot water inlet of the hot water utilization equipment and used for measuring the temperature of hot water entering the hot water utilization equipment, the third temperature sensor is in data connection with the central controller, and the central controller automatically controls the valve opening degree of the second valve and the valve opening degree of the first valve according to the temperature detected by the third temperature sensor.
Preferably, when the temperature measured by the third temperature sensor is lower than a certain temperature, the central controller controls the valve to increase the opening degree, and controls the valve to decrease the opening degree at the same time, so as to increase the flow rate of the hot water into the hot water utilizing apparatus.
Preferably, when the temperature measured by the third temperature sensor is higher than a certain temperature, the central controller controls the valve to decrease the opening degree, and simultaneously controls the valve to increase the opening degree, so as to decrease the flow rate of the hot water entering the hot water utilizing apparatus.
Preferably, the hot water boiler comprises an electric heating device and a water tank, the electric heating device is arranged in the water tank, the water tank comprises a water inlet pipe and a hot water outlet, the electric heating device comprises a first pipe box, a second pipe box and a coil pipe, the coil pipe is communicated with the first pipe box and the second pipe box to form heating fluid closed circulation, and the electric heater is arranged in the first pipe box; the first channel box is filled with phase-change fluid; the number of the coil pipes is one or more, each coil pipe comprises a plurality of arc-shaped pipe bundles, the central lines of the arc-shaped pipe bundles are arcs taking the first pipe box as a concentric circle, and the end parts of the adjacent pipe bundles are communicated, so that the end parts of the pipe bundles form free ends of the pipe bundles; the water tank is characterized in that the water tank is of a circular section, the number of the electric heating devices is multiple, one electric heating device is arranged in the center of the water tank and becomes a central electric heating device, and the other electric heating devices are distributed around the center of the water tank and become peripheral electric heating devices.
Compared with the prior art, the invention has the following advantages:
1) according to the invention, the opening and closing of the second valve of the first valve and the opening degree are intelligently controlled through the temperature of the hot water inlet, so that when the temperature of the hot water is high, after the requirement of hot water generation is met, redundant heat can be stored through the heat accumulator, when the temperature of the hot water is low, more hot water can enter hot water utilization equipment for utilization, the requirement of the hot water is ensured, and meanwhile, energy is saved.
2. The invention designs a layout of an electric heating device with a novel structure in a water tank, which can further improve the heating efficiency.
3. The electric heating device provided by the invention intermittently heats in a period, and can realize periodic frequent vibration of the elastic coil, so that good descaling and heating effects are realized.
4. The invention increases the heating power of the coil pipe periodically and continuously and reduces the heating power, so that the heated fluid can generate the volume which is continuously in a changing state after being heated, and the free end of the coil pipe is induced to generate vibration, thereby strengthening heat transfer.
5. The invention optimizes the optimal relationship of the parameters of the coil pipe through a large amount of experiments and numerical simulation, thereby realizing the optimal heating efficiency.
Drawings
Fig. 1 is a schematic structural view of a hot water boiler system of the present invention.
Fig. 2 is a schematic view of a control structure of the hot water boiler system of the present invention.
Fig. 3 is a schematic view of a control structure of the hot water boiler system of the present invention.
Fig. 4 is a top view of the electric heating apparatus of the present invention.
Fig. 5 is a front view of the electric heating apparatus.
Fig. 6 is a coordinate schematic diagram of intermittent heating of an electric heating device.
Fig. 7 is a graph of the coordinates of the periodic increase and decrease in heating power of the electric heating device.
Fig. 8 is a coordinate diagram of another embodiment of the electric heating device periodically increasing and decreasing heating power.
Fig. 9 is a coordinate diagram of the linear change of the heating power of the electric heating device.
Fig. 10 is a schematic layout view of an electric heating device arranged in a circular water tank.
Fig. 11 is a schematic view of a coil arrangement.
Fig. 12 is a schematic view of the water tank structure.
In the figure: 1 hot water boiler, 2 hot water utilization devices, 3 heat accumulators, 4 first valves, 5 second valves, 6 third valves, 7 fourth valves, 8 fifth valves, 9 hot water pipes, 91 main pipes, 92 auxiliary pipes, 10 return pipes and 11 central controllers;
12. coil pipe 13, first pipe box 14, free end 15, free end 16, water inlet pipe 17, hot water outlet 18, free end 19, second pipe box 20, connecting point 21, electric heating device 22, water tank 23 pipe bundle 24 and electric heater
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings.
In this document, "/" denotes division and "×", "denotes multiplication, referring to formulas, if not specifically stated.
The following detailed description of embodiments of the invention refers to the accompanying drawings.
An intelligently controlled hot water boiler system, as shown in fig. 1, comprises a hot water boiler 1, a hot water utilization device 2 and a heat accumulator 3, wherein the hot water boiler 1 is connected with a hot water pipe 9, the hot water pipe 9 comprises a main pipe 91 and an auxiliary pipe 92, the hot water utilization device 2 is arranged on the main pipe 91, the heat accumulator 3 is arranged on the auxiliary pipe 92, the main pipe 91 and the auxiliary pipe 92 form a parallel pipeline, and the hot water utilization device 2 utilizes hot water generated in the hot water boiler 1. Hot water generated by the hot water boiler 1 enters the hot water utilization device 2 and the heat accumulator 3 of the main pipe 2 and the auxiliary pipe 3, the hot water is heated by the hot water heat energy in the hot water utilization device 2, heat is accumulated in the heat accumulator 3, and the hot water exchanges heat in the hot water utilization device 2 and the heat accumulator 3, then converges and enters the water return pipe, and returns to the hot water boiler 1 through the water return pipe.
In the system, the heat energy of the hot water is fully utilized, and meanwhile, the heat accumulator can be used for accumulating the redundant heat energy.
Preferably, the present system may be provided with only the hot water utilizing apparatus 2 without providing the sub pipe.
Preferably, the hot water boiler may be a hot water boiler of hot water generated by fuel combustion. Or can be an electric heating hot water boiler
As shown in fig. 1, the system includes first and second valves 4 and 5, and third and fourth valves 6 and 7, the third valve 6 being provided on a hot water pipe 9 upstream of the hot water utilizing device 2 and the regenerator 3, for controlling the total flow rate of hot water into the hot water utilization device 2 and the heat accumulator 3, a fourth valve 7 is provided on a return pipe 10 downstream of the hot water utilization device 2 and the heat accumulator 3, a second valve 5 is provided at the position of the inlet of the hot water utilization device 2 of the main pipe 91, for controlling the flow rate of the hot water entering the hot water utilization device 2, a first valve 4 is provided at the position of the inlet pipe of the heat accumulator 3 of the secondary pipe 92, for controlling the flow of hot water into the thermal accumulator 3, the system also comprises a central controller 11, the central controller is in data connection with the first valve 4, the second valve 5 and the third valve 6, the fourth valve 7. The central controller controls the opening and closing of the first valve 4, the second valve 5, the third valve 6, and the fourth valve 7, and the size of the opening, thereby controlling the amount of hot water introduced into the hot water utilizing apparatus 2 and the heat accumulator 3.
Preferably, as shown in fig. 3, the system is further provided with a bypass pipeline connected with the hot water pipe 9, the connection position of the bypass pipeline and the hot water pipe 9 is positioned at the upstream of the third valve 6, and the bypass pipeline is provided with a fifth valve 8. The fifth valve 8 is in data connection with a central control unit 11. The opening and closing of the fifth valve 8 can ensure whether or not the hot water passes through the hot water utilization device 2 and the heat accumulator 3.
Preferably, the fifth valve 8 is open and the third valve 6 and the third valve 7 are closed.
Control of the opening and closing of the valve according to the flow of hot water
Preferably, a hot water flow sensor is provided in the hot water pipe 9 upstream of the third valve 6, and the flow sensor is used for detecting whether hot water flows through the hot water pipe. The flow sensor is in data connection with a central controller, which controls the opening and closing of the third valve 6 and the fourth valve according to the data detected by the flow sensor.
When the central controller detects that hot water passes through the hot water pipe 9, for example, when the hot water boiler is running, the central controller controls the third valve 6 and the fourth valve 7 to be in an open state, the hot water can enter the hot water utilization device 2 and the heat accumulator 3, and the hot water enters the water return pipe after heat exchange is completed. When the central controller detects that no hot water passes through the hot water pipe 9, for example, when the hot water boiler stops operating, the central controller controls the third valve 6 and the fourth valve 7 to be closed, and the pipeline where the hot water utilization device 2 and the heat accumulator 3 are located forms a circulating pipeline. At this time, the hot water utilizing device 2 is heated by the stored heat of the heat accumulator 3, and the stored heat energy is utilized. Through the operation, when hot water exists, under the condition that the hot water quantity generated by the hot water utilization device 2 is met, more heat can be stored in the heat accumulator 3, and under the condition that no hot water residual heat exists, the hot water utilization device 2 is heated by the heat stored by the hot water residual heat, so that the actual working requirement of the hot water utilization device 2 is met. Therefore, the waste heat of the hot water can be fully utilized, and the waste of excessive heat is avoided.
Preferably, the fifth valve 8 is open and the third valve 6 and the third valve 7 are closed.
Preferably, when the hot water sensor detects hot water, the central controller controls the fifth valve 8 to be closed and the third valve 6 and the fourth valve 7 to be opened.
Preferably, when the hot water sensor detects that there is no hot water, the central controller controls the fifth valve 8 to be opened, and the third valve 6 and the fourth valve 7 to be closed.
(II) controlling the operation of the power plant of the closed cycle system according to the hot water flow
Preferably, the auxiliary pipe 3 is provided with a power circulating device, and the power circulating device is operated to enable the pipeline where the hot water utilization device 2 and the heat accumulator 3 are located to form a circulating pipeline under the condition that no residual heat of the hot water exists.
Preferably, the power cycle device is in data connection with a central controller, and the central controller 11 automatically controls the operation of the power cycle device according to data monitored by a hot water pipe flow sensor.
When the central controller detects that hot water passes through the pipeline, the central controller automatically controls the power cycle device to stop running. When the central controller detects that no hot water passes through the pipeline, the central controller automatically controls the power cycle device to start running. By controlling the intelligent operation of the power circulation device, the intelligent control of the operation of the power circulation device can be realized according to the actual situation, and the intelligence of the system is improved.
Preferably, the power cycle device is a pump.
(III) controlling the operation of the power cycle device based on the dual temperature detection
Preferably, the hot water utilization device 2 is a water heater, hot water enters the water heater and is heated by an indirect heat exchange mode to generate domestic hot water, such as hot water for bathing; a first temperature sensor is arranged in the heat accumulator 3 and used for detecting the temperature of a heat storage material in the heat accumulator. A second temperature sensor is arranged in the hot water utilization device and is used for detecting the temperature of the water in the hot water utilization device 2. The first temperature sensor and the second temperature sensor are in data connection with the central controller 11. The central controller 11 automatically controls the operation of the power cycle device according to the temperatures detected by the first and second temperature sensors.
The central controller 11 controls the hot water using device 2 to stop operating if the temperature detected by the first temperature sensor is lower than the temperature detected by the second temperature sensor. The central controller 11 controls the hot water utilizing apparatus 2 to start operating if the temperature detected by the first temperature sensor is higher than the temperature detected by the second temperature sensor.
The operation of the hot water utilization device 2 is controlled by the detected temperature, and the hot water utilization device can be heated autonomously. Since it is found in the research and development and experiment process that when the heat of the heat accumulator is gradually exhausted, the temperature of the hot water from the heat accumulator is lower than that of the water in the hot water utilization device 2, in such a case, it is impossible to heat the hot water utilization device by using the heat accumulator, and the heat of the hot water utilization device may be taken away. Therefore, the operation of the hot water utilization device 2 is intelligently controlled according to the detected temperature, so that the circulation of the heat accumulator 3 and the hot water utilization device 2 is intelligently controlled, and the hot water production rate is improved.
(IV) controlling the opening of the valve according to the temperature of the hot water at the inlet of the hot water utilization device
Preferably, a third temperature sensor is provided at a position of a hot water inlet of the hot water utilizing apparatus 2 for measuring a temperature of the hot water entering the hot water utilizing apparatus 3. The third temperature sensor is in data connection with a central controller 11, which automatically controls the valve opening of the second valve 5 and the first valve 4 in dependence on the temperature detected by the third temperature sensor.
Preferably, when the temperature measured by the third temperature sensor is lower than a certain temperature, the central controller controls the valve 5 to increase the opening degree, and controls the valve 4 to decrease the opening degree, so as to increase the flow rate of the hot water into the hot water utilizing apparatus 2. When the temperature measured by the third temperature sensor is higher than a certain temperature, the central controller controls the valve 5 to decrease the opening degree, and simultaneously controls the valve 4 to increase the opening degree, so as to decrease the flow rate of the hot water entering the hot water utilizing apparatus 2.
When the temperature measured by the third temperature sensor is low to a certain temperature, the heat exchange capacity of the hot water utilization equipment 2 is poor, and normal requirements cannot be met, so that more hot water is required to enter the hot water utilization equipment, and heat exchange is carried out.
Through foretell operation, can be when hot water temperature is high, after satisfying hot water production demand, carry out the heat accumulation with unnecessary heat through the heat accumulator, when hot water temperature is low, can utilize in getting into hot water utilization equipment more hot water, guaranteed hydrothermal demand, the energy saving simultaneously.
(V) controlling the opening and closing of the valve according to the temperature of the hot water
Preferably, a fourth temperature sensor is arranged in the hot water pipe 9 upstream of the third valve 6, and the fourth temperature sensor is used for detecting the temperature of hot water in the hot water pipe. The fourth temperature sensor is in data connection with the central controller, and the central controller controls the opening and closing of the third valve 6 and the fourth valve 7 according to data detected by the fourth temperature sensor.
When the central controller detects that the temperature of the hot water pipe 9 exceeds a certain temperature, for example, the hot water boiler starts to output high-temperature hot water in operation, the central controller controls the third valve 6 and the fourth valve 7 to be in an open state, the hot water can enter the hot water utilization device 2 and the heat accumulator 3, and the hot water flows back to the hot water boiler after heat exchange is completed. When the central controller detects that the temperature of the hot water in the hot water pipe 9 is lower than a certain temperature, for example, when the hot water boiler stops operating, the central controller controls the third valve 6 and the fourth valve 7 to be closed, and the pipelines where the hot water utilization device 2 and the heat accumulator 3 are located form a circulating pipeline. At this time, the hot water utilizing device 2 is heated by the heat stored in the heat accumulator 3, and the heat stored is utilized. Through the operation, when the hot water temperature meets the requirement, under the condition of meeting the hot water quantity generated by the hot water utilization equipment 2, the excessive heat can be stored in the heat accumulator 3, and under the condition of no hot water residual heat, the heat stored by the hot water residual heat is utilized to heat the hot water utilization equipment 2, so that the actual working requirement of the hot water utilization equipment 2 can be met. Therefore, the waste heat of the hot water can be fully utilized, and the waste of excessive heat is avoided.
Preferably, when the hot water sensor detects that a certain temperature is exceeded, the central controller controls the fifth valve 8 to be closed, and the third valve 6 and the fourth valve 7 to be opened.
Preferably, when the hot water sensor detects that the temperature is lower than a certain temperature, the central controller controls the fifth valve 8 to be opened, and the third valve 6 and the fourth valve 7 to be closed.
(VI) controlling the operation of the power cycle device of the closed cycle system according to the hot water flow
This embodiment is an improvement on the basis of the (fifth) embodiment.
Preferably, the auxiliary pipe 3 is provided with a power circulation device, and when the temperature of the hot water in the pipeline 14 is lower than a certain temperature, the pipeline where the hot water utilization device 2 and the heat accumulator 3 are located forms a circulation pipeline by the operation of the power circulation device which is a pump.
Preferably, the power cycle device is in data connection with a central controller, and the central controller 11 automatically controls the operation of the power cycle device according to data monitored by a hot water pipe sensor.
When the central controller detects that the temperature of the hot water in the pipeline is higher than a certain temperature, the central controller controls the third valve 6 and the fourth valve 7 to be opened, and the automatic control power cycle device stops the operation of the pump. Since the hot water temperature at this time satisfies the heat exchange requirement, the hot water utilizing device and the heat accumulator 3 can be heated by the hot water. When the central controller detects that the temperature of the pipeline hot water is lower than a certain temperature, the central controller controls the third valve 6 and the fourth valve 7 to be closed, and the central controller automatically controls the power circulation device to start the operation of the pump. Since the hot water temperature at this time does not satisfy the heat exchange requirement, the hot water utilizing device needs to be heated by the heat accumulator 3. The intelligent operation of the pump of the power circulation device is controlled according to the temperature of the hot water, so that the intelligent control of the pump operation of the power circulation device can be realized according to actual conditions, and the intelligence of the system is improved.
When the central controller detects that the temperature of the hot water in the pipeline is higher than a certain temperature, the fifth valve is closed. When the central controller detects that the temperature of the pipeline hot water is lower than a certain temperature, the fifth valve is opened.
(VII) controlling the operation of the power cycle device according to the outlet temperature detection of the heat accumulator
Preferably, a first temperature sensor is arranged at the outlet of the heat accumulator 3 for detecting the temperature of the outlet gas of the heat accumulator. A second temperature sensor is arranged in the hot water utilization device and is used for detecting the temperature of the water in the hot water utilization device 2. The first temperature sensor and the second temperature sensor are in data connection with the central controller 11. The central controller 11 automatically controls the operation of the power cycle apparatus, which is a pump, according to the temperatures detected by the first and second temperature sensors.
The central controller 11 controls the power cycle device to stop the operation of the pump if the temperature detected by the first temperature sensor is lower than the temperature detected by the second temperature sensor.
Under the condition that the third valve and the fourth valve are closed, the operation of the pump of the power cycle device is controlled through the detected temperature, and the automatic heating of the hot water utilization equipment can be realized. Since it was found in the course of research and development and experiments that the temperature of the gas from the heat accumulator is lower than the temperature of the water in the hot water utilization device 2 when the heat of the heat accumulator is gradually used up, it is impossible to heat the hot water utilization device by using the heat accumulator, and the heat of the hot water utilization device may be carried away. Therefore, the circulation of the heat accumulator 3 and the hot water utilization device 2 is intelligently controlled by intelligently controlling the operation of the power circulation device, which is a pump, according to the detected temperature, thereby increasing the production rate of hot water.
A hot water boiler comprises an electric heating device 21 and a water tank 11, wherein the electric heating device 21 is arranged in the water tank 11, and the water tank 11 comprises a water inlet pipe 5 and a hot water outlet 6. A hot water outlet 6 is provided at the upper part of the water tank.
Preferably, the water tank is of cylindrical configuration.
Fig. 4 shows a top view of the electric heating device 21, as shown in fig. 4, the electric heating device 21 includes a first pipe box 13, a second pipe box 19 and a coil 12, the coil 12 is communicated with the first pipe box 13 and the second pipe box 19, a fluid is circulated in the first pipe box 13, the second pipe box 19 and the coil 12 in a closed manner, an electric heater 24 is disposed in the electric heating device 21, and the electric heater 24 is used for heating the fluid in the electric heating device 21 and then heating the water in the water tank by the heated fluid.
As shown in fig. 4 to 5, the electric heater 24 is disposed in the first header 13; the first channel box 13 is filled with phase-change fluid; the number of the coil pipes 12 is one or more, each coil pipe 12 comprises a plurality of circular arc-shaped pipe bundles 23, the center lines of the circular arc-shaped pipe bundles 23 are circular arcs taking the first pipe box 13 as a concentric circle, the end parts of the adjacent pipe bundles 23 are communicated, and fluid forms serial flow between the first pipe box 13 and the second pipe box 19, so that the end parts of the pipe bundles form pipe bundle free ends 14 and 15; the fluid is phase-change fluid, vapor-liquid phase-change liquid, the electric heating device is in data connection with the controller, and the controller controls the heating power of the electric heating device to periodically change along with the change of time.
Preferably, the first and second headers 13 and 19 are provided along the height direction.
It has been found in research and practice that continuous power-stable heating of the electric heater results in fluid-forming stability of the internal electric heating device, i.e., fluid is not flowing or is less fluid, or flow is stable, resulting in a large reduction in the vibrational performance of the coil 12, thereby affecting the efficiency of descaling and heating of the coil 12. There is therefore a need for an improvement to the electrical heating coil described above as follows.
Preferably, the heating power is a batch type heating method.
As shown in fig. 6, the heating power P of the electric heater varies regularly during one cycle time T as follows:
in a half period of 0-T/2, P ═ n, where n is a constant number in watts (W), i.e., the heating power remains constant;
and P is 0 in the half period of T/2-T. I.e. the electric heater does not heat.
T is 50-80 minutes, wherein 4000W < n < 5000W.
Through the heating with the time variability, the fluid can be frequently evaporated, expanded and contracted in the elastic tube bundle, so that the vibration of the elastic tube bundle is continuously driven, and the heating efficiency and the descaling operation can be further realized.
Preferably, the electric heater 24 is provided in a plurality, each electric heater is independently controlled, and the number of the electric heaters which are activated is periodically changed along with the change of time.
Preferably, the number of the electric heaters is n, one electric heater is started at intervals of T/2n in one period T until the heaters are all started at the time of T/2n, and then one electric heater is stopped at intervals of T/2n until the heaters are all stopped at the time of T.
Preferably, the heating power of each electric heater is the same. The relationship diagram is shown in fig. 7.
Through the heating with the time variability, the fluid can be frequently evaporated, expanded and contracted in the elastic tube bundle, so that the vibration of the elastic tube bundle is continuously driven, and the heating efficiency and the descaling operation can be further realized.
Preferably, the electric heater is provided in a plurality of stages in the height direction, each stage is independently controlled, and the electric heater is sequentially started from the lower end in the height direction until all the stages are started in a half period T/2 along with the change of time, and then is sequentially turned off from the upper end in the following half period T/2 until all the stages are turned off.
That is, assuming that the electric heater is n segments, in a period T, every T/2n time, starting one segment from the lower end until all segments are started at T/2n time, and then every T/2n time, starting from the upper end, closing one segment until all segments are closed at T time.
Preferably, the heating power is the same for each section. The relationship diagram is shown in fig. 7.
The electric heater is started from the lower part upwards gradually, so that the fluid at the lower part is fully heated, a good natural convection is formed, the flow of the fluid is further promoted, and the elastic vibration effect is increased. Through the change of the heating power with time variability, the fluid can be frequently evaporated, expanded and contracted in the elastic tube bundle, so that the vibration of the elastic tube bundle is continuously driven, and the heating efficiency and the descaling operation can be further realized.
Preferably, the number of the electric heaters 24 is multiple, each electric heater 24 has different power, one or more electric heaters can be combined to form different heating powers, in the last half cycle, according to a time sequence, the single electric heater is started firstly, the single electric heater is independently started according to a sequence that the heating power is sequentially increased, then the two electric heaters are started, the two electric heaters are independently started according to a sequence that the heating power is sequentially increased, then the number of the started electric heating devices is gradually increased, and if the number is n, the n electric heaters are independently started according to a sequence that the heating power is sequentially increased; and ensuring that the heating power of the electric heating devices is sequentially increased until all the electric heaters are started finally. In the next half period, the single electric heater is not started independently according to the sequence that the heating power is increased sequentially, then the two electric heaters are not started, the two electric heaters are not started independently according to the sequence that the heating power is increased sequentially, then the number of the electric heaters which are not started is increased gradually, and if the number is n, the n electric heaters are not started independently according to the sequence that the heating power is increased sequentially; and (3) until all the electric heaters are not started, ensuring that the heating power of the electric heaters is reduced in sequence.
For example, the number of the electric heating devices is three, namely a first electric heating device D1, a second electric heating device D2 and a third electric heating device D3, and the heating powers are P1, P2 and P3, wherein P1 < P2 < P3, P1+ P2 > P3; the sum of the first electric heating device and the second electric heating device is larger than that of the third electric heating device, the first, the second, the third, the first plus the second, the first plus the third, the second plus the third, then the first, the second and the third are started in sequence according to the time sequence, and the sequence of non-starting in the next half period is the first, the second, the third, the first plus the second, the first plus the third, the second plus the third, then the first, the second and the third.
The heating power is gradually increased and decreased through the electric heater, the flowing of the fluid is further promoted, and the elastic vibration effect is increased. Through the change of the heating power with time variability, the fluid can be frequently evaporated, expanded and contracted in the elastic tube bundle, so that the vibration of the elastic tube bundle is continuously driven, and the heating efficiency and the descaling operation can be further realized.
Preferably, the heating power of the electric heating device is linearly increased in the first half period, and the heating power of the electric heating device is linearly decreased in the second half period, see fig. 9.
The linear variation of the heating power is achieved by a variation of the input current or voltage.
By arranging the plurality of electric heaters, the starting of the electric heaters with gradually increased quantity is realized, and the linear change is realized.
Preferably, the period is 50 to 300 minutes, preferably 50 to 80 minutes; the average heating power of the electric heating device is 2000-4000W.
Preferably, the pipe diameter of the first pipe box 13 is smaller than that of the second pipe box 19, and the pipe diameter of the first pipe box 13 is 0.5-0.8 times of that of the second pipe box 19. Through the pipe diameter change of first pipe case and second pipe case, can guarantee that the fluid carries out the phase transition and in the internal time of first box short, get into the coil pipe fast, fully get into the heat transfer of second box.
Preferably, the coil is connected to the first header at a location 20 that is lower than the location where the second header is connected to the coil. This ensures that hot water can quickly enter the second header upwards.
Preferably, the first and second headers are provided with return lines at their bottoms to ensure that condensed fluid in the second header can enter the first line.
Preferably, the first and second headers are arranged in a height direction, the coil pipe is provided in plural numbers in the height direction of the first header, and a pipe diameter of the coil pipe is gradually reduced from top to bottom.
Preferably, the pipe diameter of the coil pipe is gradually decreased and gradually increased along the direction from the top to the bottom of the first pipe box.
The pipe diameter range through the coil pipe increases, can guarantee that more hot water passes through upper portion entering second box, guarantees that hydrothermal distribution is even in all coil pipes, further reinforces the heat transfer effect for whole vibration effect is even, and the heat transfer effect increases, further improves heat transfer effect and scale removal effect. Experiments show that the structural design can achieve better heat exchange effect and descaling effect.
Preferably, the plurality of coils are arranged along the height direction of the first tube box, and the distance between the adjacent coils is increased from the top to the bottom.
Preferably, the distance between the coils increases along the height direction of the first header.
The interval amplitude through the coil pipe increases, can guarantee that more hot water passes through upper portion entering second box, guarantees that hydrothermal distribution is even in all coil pipes, further reinforces the heat transfer effect for the whole vibration effect is even, and the heat transfer effect increases, further improves heat transfer effect and scale removal effect. Experiments show that the structural design can achieve better heat exchange effect and descaling effect.
Preferably, as shown in fig. 10, the water tank is a water tank having a circular cross section, and a plurality of electric heating devices are provided in the water tank.
Preferably, as shown in fig. 10, a plurality of electric heaters are disposed in the water tank, one of the electric heaters is disposed at the center of the water tank to become a central electric heater, and the others are distributed around the center of the water tank to become peripheral electric heaters. Through such structural design, can be so that the interior fluid of water tank fully reaches the vibration purpose, improve the heat transfer effect.
Preferably, the heating power of the single peripheral electric heating means is smaller than the heating power of the central electric heating means. Through the design, the center reaches higher vibration frequency to form a central vibration source, so that the periphery is influenced, and better heat transfer enhancement and descaling effects are achieved.
Preferably, on the same horizontal heat exchange section, the fluid needs to achieve uniform vibration, and uneven heat exchange distribution is avoided. It is therefore necessary to distribute the amount of heating power among the different electric heating devices reasonably. Experiments show that the heating power ratio of the central electric heating device to the peripheral tube bundle electric heating device is related to two key factors, wherein one of the two key factors is the distance between the peripheral electric heating device and the center of the water tank (namely the distance between the circle center of the peripheral electric heating device and the circle center of the central electric heating device) and the diameter of the water tank. Therefore, the invention optimizes the optimal proportional distribution of the pulsating flow according to a large number of numerical simulations and experiments.
Preferably, the radius of the inner wall of the water tank is B, the center of the central electric heating device is arranged at the center of the circular cross section of the water tank, the distance from the center of the peripheral electric heating device to the center of the circular cross section of the water tank is S, the centers of adjacent peripheral electric heating devices are respectively connected with the center of the circular cross section, the included angle formed by the two connecting lines is a, the heating power of the peripheral electric heating device is W2, and the heating power of a single central electric heating device is W1, so that the following requirements are met:
W1/W2 ═ a-B ═ Ln (B/S); ln is a logarithmic function;
a and b are coefficients, wherein 1.855 < a < 1.865 and 0.600 < b < 0.610;
1.25＜B/S＜2.1；
1.4＜W1/W2＜1.8。
wherein 35 DEG < A < 80 deg.
Preferably, the number of the four-side distribution is 4-5.
Preferably, B is 1600-2400 mm, preferably 2000 mm; s is 1200-2000 mm, preferably 1700 mm; the diameter of the heat exchange tube is 12-20 mm, preferably 16 mm; the outermost diameter of the pulsating coil is 300-. The diameter of the riser is 100-116 mm, preferably 108 mm, the height of the riser is 1.8-2.2 m, preferably 2 m, and the spacing between adjacent pulse tubes is 65-100 mm. Preferably around 80 mm.
The total heating power is preferably 4000-10000W, more preferably 5500W.
More preferably, a is 0.18606 and b is 0.6041.
The hot water outlet is arranged at the upper position of the side wall of the water tank.
Preferably, the box body has a circular cross section, and is provided with a plurality of electric heating devices, wherein one electric heating device is arranged at the center of the circular cross section and the other electric heating devices are distributed around the center of the circular cross section.
The coils 12 are in one or more groups, each group of coils 12 comprises a plurality of circular arc-shaped tube bundles 23, the central lines of the circular arc-shaped tube bundles 23 are circular arcs of concentric circles, and the ends of the adjacent tube bundles 23 are communicated, so that the ends of the coils 12 form free ends 14 and 15, such as the free ends 14 and 15 in fig. 5.
Preferably, the heating fluid is a vapor-liquid phase-change fluid.
Preferably, the first header 13, the second header 19, and the coil pipe 12 are all of a circular pipe structure.
Preferably, the tube bundle of the coil 12 is an elastic tube bundle.
The heat transfer coefficient can be further improved by providing the tube bundle of the coil 12 with an elastic tube bundle.
Preferably, the concentric circles are circles centered on the center of the first header 13. I.e. the tube bundle 23 of the coil 12 is arranged around the centre line of the first tube box 13.
As shown in fig. 7, the tube bundle 23 is not a complete circle, but leaves a mouth, forming the free end of the tube bundle. The angle of the arc of the mouth part is 65-85 degrees, namely the sum of the included angles b and c in figure 11 is 65-85 degrees.
Preferably, the ends of the tube bundle on the same side are aligned in the same plane, with the extension of the ends (or the plane in which the ends lie) passing through the median line of the first tube box 13.
Further preferably, the electric heater 24 is an electric heating rod.
Preferably, the first end of the inner tube bundle of the coil 12 is connected to the first header 13, the second end is connected to one end of the adjacent outer tube bundle, one end of the outermost tube bundle of the coil 12 is connected to the second header 19, and the ends of the adjacent tube bundles are connected to form a serial arrangement.
The plane in which the first end is located forms an angle c of 40-50 degrees with the plane in which the centre lines of the first and second headers 13, 19 are located.
The plane in which the second end is located forms an angle b of 25-35 degrees with the plane in which the centre lines of the first and second headers 13, 19 are located.
Through the design of the preferable included angle, the vibration of the free end is optimal, and therefore the heating efficiency is optimal.
As shown in fig. 11, there are 4 tube bundles of coil 12, with tube bundles A, B, C, D in communication. Of course, the number is not limited to four, and a plurality of the connecting structures are provided as required, and the specific connecting structure is the same as that in fig. 8.
The number of the coil pipes 12 is plural, and the plural coil pipes 12 are independently connected to the first pipe box 13 and the second pipe box 19, that is, the plural coil pipes 12 are in a parallel structure.
Although the present invention has been described with reference to the preferred embodiments, it is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (5)
1. A hot water boiler system comprises a hot water boiler, hot water utilization equipment and a heat accumulator, wherein the hot water boiler is connected with a hot water pipe, the hot water pipe comprises a main pipe and an auxiliary pipe, the hot water utilization equipment is arranged on the main pipe, the heat accumulator is arranged on the auxiliary pipe, the main pipe and the auxiliary pipe form a parallel pipeline, hot water generated by the hot water boiler respectively enters the hot water utilization equipment and the heat accumulator of the main pipe and the auxiliary pipe, the hot water is heated by using the heat energy of the hot water in the hot water utilization equipment, heat is stored in the heat accumulator, the hot water is converged into a water return pipe after heat exchange in the hot water utilization equipment and the heat accumulator, and;
the system is characterized in that a second valve is arranged at the position of an inlet of hot water utilization equipment of a main pipe and used for controlling the flow of hot water entering the hot water utilization equipment, a first valve is arranged at the position of an inlet pipe of a heat accumulator of an auxiliary pipe and used for controlling the flow of the hot water entering the heat accumulator, and the system also comprises a central controller which is in data connection with the first valve and the second valve; the third temperature sensor is arranged at the position of a hot water inlet of the hot water utilization equipment and used for measuring the temperature of hot water entering the hot water utilization equipment, the third temperature sensor is in data connection with the central controller, and the central controller automatically controls the valve opening degree of the second valve and the valve opening degree of the first valve according to the temperature detected by the third temperature sensor.
2. The water heating boiler system according to claim 1, wherein the central controller controls the valve to increase the opening degree and controls the valve to decrease the opening degree to increase the flow rate of the hot water into the hot water utilizing apparatus when the temperature measured by the third temperature sensor is lower than a certain temperature.
3. The water heating boiler system according to claim 2, wherein the central controller controls the valve to decrease the opening degree and controls the valve to increase the opening degree at the same time when the temperature measured by the third temperature sensor is higher than a certain temperature to decrease the flow rate of the hot water into the hot water utilizing apparatus.
4. The hot water boiler system according to claim 1, wherein the hot water boiler comprises an electric heating device, a water tank, the electric heating device being disposed in the water tank, the water tank comprising a water inlet pipe and a hot water outlet, the electric heating device comprising a first pipe box, a second pipe box, and a coil pipe, the coil pipe being in communication with the first pipe box and the second pipe box to form a closed circulation of heating fluid, the electric heater being disposed in the first pipe box; filling phase-change fluid in the first channel; the number of the coil pipes is one or more, each coil pipe comprises a plurality of arc-shaped pipe bundles, the central lines of the arc-shaped pipe bundles are arcs taking the first pipe box as a concentric circle, and the end parts of the adjacent pipe bundles are communicated, so that the end parts of the pipe bundles form free ends of the pipe bundles; the water tank is characterized in that the water tank is of a circular section, the number of the electric heating devices is multiple, one electric heating device is arranged in the center of the water tank and becomes a central electric heating device, and the other electric heating devices are distributed around the center of the water tank and become peripheral electric heating devices.
5. The utility model provides a hot water boiler, hot water boiler includes electric heater unit, water tank, electric heater unit sets up in the water tank, the water tank includes inlet tube and hot water export, electric heater unit includes first pipe case, second pipe case and coil pipe, and the coil pipe is linked together with first pipe case and second pipe case, forms heating fluid closed cycle.
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Address after: 266000 Songling Road, Laoshan District, Qingdao, Shandong Province, No. 99 Applicant after: QINGDAO University OF SCIENCE AND TECHNOLOGY Address before: No. 53, Zhengzhou Road, North District, Qingdao, Shandong Applicant before: QINGDAO University OF SCIENCE AND TECHNOLOGY |
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Effective date of registration: 20230728 Address after: 410000 Xinya Entrepreneurship Park, Tongguan Circular Economy Industrial Base, Wangcheng Economic and Technological Development Zone, Changsha City, Hunan Province Patentee after: Changsha Langsheng Washing Co.,Ltd. Address before: 266000 Songling Road, Laoshan District, Qingdao, Shandong Province, No. 99 Patentee before: QINGDAO University OF SCIENCE AND TECHNOLOGY |