CN111102747A

CN111102747A - Novel high-precision high-safety water body heating composite control system

Info

Publication number: CN111102747A
Application number: CN201811253633.8A
Authority: CN
Inventors: 欧金安
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-10-25
Filing date: 2018-10-25
Publication date: 2020-05-05

Abstract

The invention discloses a high-precision high-safety novel water body heating composite control system which comprises a phase-shifting power adjusting module, a display module, a temperature acquisition module, an off-water power-off module, a silicon controlled temperature detection module and a CPU. Has the advantages that: the safety is high: through a multiple protection mechanism, when high temperature or water temperature is out of control, the relay protection circuit can forcibly close output, so that high temperature danger of a water body can be effectively avoided; the circuit is arranged through soft start, so that the impact of current when the heating body is started can be reduced, and through the access of the optical coupler, the control module and the driving module are isolated, the separation of strong current and weak current is realized, and the whole system is safer. The temperature control precision is high: through PID algorithm and power regulation output, the water body can be heated stably and is kept in the set target temperature range all the time. The intelligence is good: through leaving the water outage module, can guarantee that the heating member when unexpected leaving the water surface, intelligence stops the heating, protection circuit and heating member itself.

Description

Novel high-precision high-safety water body heating composite control system

Technical Field

The invention relates to the field of water heating, in particular to a novel high-precision high-safety water heating composite control system.

Background

At present, a large-scale water body system, such as a swimming pool, particularly in winter, needs to heat pool water in order to prolong the service life of the swimming pool and maintain proper temperature of the pool water, so the swimming pool is a large energy-consuming household; the heating system of the traditional swimming pool and the heating of the fish water body adopt heating rods for heating, but the current heating rods have lower quality, the temperature control of the current heating rods is not accurate, the catastrophic consequences of out-of-control and over-temperature fish cooking are easy to happen, and people are scalded.

Disclosure of Invention

The invention aims to solve the problems and provide a novel high-precision high-safety water body heating composite control system.

In order to achieve the purpose, the invention provides the following technical scheme:

the invention provides a high-precision high-safety novel water body heating composite control system which comprises a phase-shifting power adjusting module, a display module, a temperature acquisition module, an off-water power-off module, a silicon controlled temperature detection module, a CPU (central processing unit), a rectification module, a relay protection module, a voltage reduction module, a zero-crossing detection module and an alternating current input module, wherein the phase-shifting power adjusting module is connected with the display module; the alternating current input module provides electric energy for the CPU through the rectifying module and the voltage reduction module in sequence;

the display module is connected with the CPU and used for displaying system parameters;

the CPU is electrically connected with the phase-shifting power adjusting module, the display module, the temperature acquisition module, the water-leaving power-off module, the silicon controlled temperature detection module, the relay protection module and the zero-crossing detection module.

Preferably, the relay protection circuit includes a relay protection circuit constituted by one relay and a circuit for driving the relay, and is controlled to be turned on or off by the CPU.

Preferably, the phase-shift power-adjusting circuit comprises a bidirectional thyristor and a circuit for driving the bidirectional thyristor, and the CPU obtains a zero-crossing point in the zero-crossing detection module, so as to perform phase-shift power adjustment on the output power.

Preferably, the zero-crossing detection module includes a rectifier bridge and an optical coupling circuit.

Preferably, the display module comprises a led nixie tube or an LCD screen and a circuit for driving the led nixie tube or the LCD screen.

Preferably, the temperature acquisition module comprises a temperature sensing sensor and a circuit for driving the temperature sensing sensor.

Preferably, the following components: the water leaving and power off module comprises a capacitance induction type water level detection circuit and a capacitance induction type water level detection device.

Preferably, the thyristor temperature detection module is composed of a temperature acquisition circuit.

Preferably, the CPU includes a single chip microcomputer and a reset circuit of the single chip microcomputer.

Preferably, the temperature control algorithm is performed by a PID principle in the running process of the CPU. Has the advantages that: 1. the safety is high: through a multiple protection mechanism, when high temperature or water temperature is out of control, the relay protection circuit can forcibly close output, so that high temperature danger of a water body can be effectively avoided; the circuit is arranged through soft start, so that the impact of current when the heating body is started can be reduced, and through the access of the optical coupler, the control module and the driving module are isolated, the separation of strong current and weak current is realized, and the whole system is safer.

2. The temperature control precision is high: through PID algorithm and power regulation output, the water body can be heated stably and is kept in the set target temperature range all the time. The phenomenon of large fluctuation of water temperature and the like is not easy to occur, and the effect of high-precision temperature control is achieved.

3. The intelligence is good: through leaving the water outage module, can guarantee that the heating member when unexpected leaving the water surface, intelligence stops the heating, protection circuit and heating member itself.

4. The circuit has good safety, and the temperature detection of the controlled silicon detects whether the work of the phase-shifting power-adjusting module is normal or not, thereby protecting the whole system.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic block diagram of the circuit of the present invention;

FIG. 2 is a circuit schematic of the zero crossing detection module of the present invention;

FIG. 3 is a functional block diagram of the relay protection circuit of the present invention;

FIG. 4 is a schematic diagram of a phase-shift power-modulating circuit of the present invention;

FIG. 5 is a schematic diagram of a display module of the present invention;

fig. 6 is a schematic diagram of the temperature acquisition module of the present invention.

FIG. 7 is a schematic diagram of the water-leaving power-off module of the present invention.

Fig. 8 is a schematic diagram of the thyristor temperature detection module of the present invention.

The reference numerals are explained below:

1. a phase-shifting power-adjusting module; 2. a display module; 3. a temperature acquisition module; 4. an out-of-water power-off module; 5. a silicon controlled temperature detection module; 6. a CPU; 7. a rectification module; 8. a relay protection module; 9. a voltage reduction module; 10. a zero-crossing detection module; 11. and an alternating current input module.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

Referring to fig. 1-8, the high-precision high-safety novel water body heating composite control system provided by the invention comprises a phase-shifting power-adjusting module, a display module, a temperature acquisition module, an off-water power-off module, a silicon controlled temperature detection module, a CPU, a rectification module, a relay protection module, a voltage reduction module, a zero-crossing detection module and an alternating current input module; the alternating current input module provides electric energy for the CPU through the rectifying module and the voltage reduction module in sequence;

The zero-crossing detection module is used for rectifying the alternating current through the rectifier bridge, then obtaining the interruption generated by the optical coupler through the optical coupler and the CPU, and finally obtaining the zero crossing point of the alternating current, the alternating current period and the frequency of the current;

the relay protection circuit: the relay circuit directly controlled by the CPU aims to immediately disconnect the relay when the system detects abnormality, so that the heating of the water body is stopped, and the out-of-control over-temperature is avoided;

a display module: the CPU is directly or indirectly driven to display the current water temperature or the set target temperature and the abnormal number;

a temperature acquisition module: through a temperature acquisition circuit consisting of the temperature-sensitive resistor and the high-precision resistor, the CPU obtains the voltage division through ADC conversion, and the temperature is calculated according to a temperature resistance comparison table of the temperature-sensitive resistor.

The water leaving power-off module: and judging the substance corresponding to the induction sheet by calculating the capacitance value of the induction sheet. When the water is in the water, the capacitance of the induction sheet rises, and when the water leaves the water, the capacitance of the induction sheet becomes small. So as to detect whether the heating body is in water. Once leaving the water body, the CPU triggers the relay to stop heating output immediately.

And the phase-shifting power-adjusting circuit acquires the zero crossing point of the alternating current by the CPU through zero crossing detection. And triggering the controlled silicon according to the zero crossing point time sequence to enable the controlled silicon to be in non-full wave output, thereby realizing the phase-shifting power-adjusting effect.

The thyristor temperature detection module is characterized in that temperature detection is arranged near the thyristor, the CPU obtains the temperature of the thyristor through the temperature detection, and if the temperature is abnormal, the CPU can disconnect the relay according to the abnormal condition, so that the whole circuit and the water temperature are protected.

And the PID logic performs temperature control algorithm, namely, the proportion, the differentiation and the integration are calculated by the difference value of the target temperature and the current temperature so as to adjust the output power. The system adopts a PID position algorithm, and the formula is as follows:

wherein u is output power, k is acquisition time, and Kp is a proportionality coefficient; ki is an integral time constant; kd is the differential time constant. Because the heat dissipation speed of the fish tank system is slow, in order to optimize the control precision, the system optimizes and inhibits the saturation phenomenon in the PID control process, and the optimized algorithm is as follows:

wherein, max (e (k),0) function represents taking its maximum value, i.e. 0 when negative number appears.

Has the advantages that: 1. the safety is high: through a multiple protection mechanism, when high temperature or water temperature is out of control, the relay protection circuit can forcibly close output, so that high temperature danger of a water body can be effectively avoided; the circuit is arranged through soft start, so that the impact of current when the heating body is started can be reduced, and through the access of the optical coupler, the control module and the driving module are isolated, the separation of strong current and weak current is realized, and the whole system is safer.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. The utility model provides a novel water heating composite control system of high safety of high accuracy which characterized in that: the power supply device comprises a phase-shifting power adjusting module, a display module, a temperature acquisition module, an off-water power-off module, a silicon controlled temperature detection module, a CPU, a rectification module, a relay protection module, a voltage reduction module, a zero-crossing detection module and an alternating current input module; the alternating current input module provides electric energy for the CPU through the rectifying module and the voltage reduction module in sequence;

2. The high-precision high-safety novel water body heating composite control system as claimed in claim 1, wherein: the relay protection circuit includes a relay protection circuit composed of a relay and a circuit for driving the relay, and is controlled to be turned on or off by the CPU.

3. The high-precision high-safety novel water body heating composite control system as claimed in claim 2, characterized in that: the phase-shifting power-adjusting circuit comprises a bidirectional controllable silicon and a circuit for driving the bidirectional controllable silicon, and a CPU obtains a zero crossing point in a zero crossing detection module so as to perform phase-shifting power adjustment on output power.

4. The high-precision high-safety novel water body heating composite control system as claimed in claim 3, wherein: the zero-crossing detection module comprises a rectifier bridge and an optical coupling circuit.

5. The high-precision high-safety novel water body heating composite control system as claimed in claim 4, wherein: the display module comprises an LED nixie tube or an LCD screen and a circuit for driving the LED nixie tube or the LCD screen.

6. The high-precision high-safety novel water body heating composite control system as claimed in claim 5, wherein: the temperature acquisition module comprises a temperature sensing sensor and a circuit for driving the temperature sensing sensor.

7. The high-precision high-safety novel water body heating composite control system as claimed in claim 6, wherein: the water leaving and power off module comprises a capacitance induction type water level detection circuit and a capacitance induction type water level detection device.

8. The high-precision high-safety novel water body heating composite control system as claimed in claim 7, wherein: the silicon controlled temperature detection module is composed of a temperature acquisition circuit.

9. The high-precision high-safety novel water body heating composite control system as claimed in claim 8, wherein: the CPU comprises a singlechip and a reset circuit of the singlechip.