Summary of the invention
The present invention is intended to overcome the deficiencies in the prior art part and provides a kind of lightweight, and is easy to use, need not to construct on the roof, can reuse, automaticity is high, and snow melt is effective, can effectively prevent gutter snow melting system that snow-broth pours in down a chimney and the snow melt control method of gutter snow melting system.
For achieving the above object, the present invention is achieved in that gutter snow melting system comprises the thermal source layer, and the external stability of described thermal source layer is furnished with overcoat.
As a kind of preferred version, the present invention also is provided with temperature control box; The port of described thermal source layer and the port of temperature control box join.
As another kind of preferred version, the present invention fixedly is furnished with the earth leakage protective layer between described thermal source layer and overcoat; The port of described earth leakage protective layer and the port of temperature control box join.
Thermal source layer of the present invention and earth leakage protective layer are arranged on the inside of overcoat, and wherein the thermal source layer links to each other with temperature control box by power line respectively with the earth leakage protective layer.
As another kind of preferred version, overcoat of the present invention can adopt macromolecular material.
Further, thermal source layer of the present invention can adopt heater.
Heater of the present invention can be selected resistive exothermic material.
Further, thermal source layer of the present invention comprises basal layer, heating layer and insulating layer; Described heating layer is fixed between basal layer and the insulating layer.
In addition, earth leakage protective layer of the present invention can adopt the steel wire lath.
Secondly, temperature control box of the present invention comprises temperature pick up, CPU and control output circuit; The output port of described temperature pick up connects the input port of CPU; The output port of described CPU connects the input port of control output circuit.
Again, the present invention also is provided with timing circuit and display circuit; The output port of described timing circuit connects the input port of control output circuit; The output port of described CPU connects the input port of display circuit.
A kind of snow melt control method of above-mentioned gutter snow melting system, can implement as follows: (1) sets the snow melt parameter; (2) judge whether to reach the snow melt time; If, stopped heating then; If not, then continue and judge whether to reach the snow melt temperature; If, stopped heating then; If not, then start heating; (3) return execution in step (2).
The inside of gutter snow melting system overcoat of the present invention is provided with thermal source layer and earth leakage protective layer, adopts this structure not only lightweight, and has effectively avoided being exposed to for a long time outdoor circuit problem of aging.
Gutter snow melting system of the present invention adopts the temperature control box device, and its automaticity is high, and snow melt is effective, can prevent effectively that snow-broth from pouring in down a chimney, so that the snow melt process is more quick, and also more energy-conservation.
The specific embodiment
As shown in the figure, a kind of gutter snow melting system, it comprises thermal source layer 2 and temperature control box 4; Is furnished with overcoat 1 in the external stability of described thermal source layer 2; The port of the port of described thermal source layer 2 and temperature control box 4 joins; Between described thermal source layer 2 and overcoat 1, fixedly is furnished with earth leakage protective layer 3; The port of the port of described earth leakage protective layer 3 and temperature control box 4 joins.
Overcoat 1 of the present invention can adopt plastics or elastomeric polymeric material.Thermal source layer 2 of the present invention adopts resistive heating board.
Thermal source layer 2 of the present invention comprises basal layer 5, heating layer 7 and insulating layer 6; Described heating layer 7 is fixed between basal layer 5 and the insulating layer 6.
Earth leakage protective layer 3 of the present invention adopts the steel wire lath.
Temperature control box 4 of the present invention comprises temperature pick up, CPU and control output circuit; The output port of described temperature pick up connects the input port of CPU; The output port of described CPU connects the input port of control output circuit.
The present invention also is provided with timing circuit and display circuit; The output port of described timing circuit connects the input port of control output circuit; The output port of described CPU connects the input port of display circuit.
A kind of snow melt control method of gutter snow melting system, can implement as follows: (1) sets the snow melt parameter; (2) judge whether to reach the snow melt time; If, stopped heating then; If not, then continue and judge whether to reach the snow melt temperature; If, stopped heating then; If not, then start heating; (3) return execution in step (2).
Overcoat 1 of the present invention has that hot strength and tearing toughness are high, elongation at break is large, good heat resistance, low temperature flexibility are good, the superior performance such as corrosion-resistant, ageing-resistant, so that gutter snow melting system can be placed on for a long time outdoor, and be difficult for wearing out the application life of greatly having improved gutter snow melting system.
Thermal source layer 2 of the present invention has the intensity height, the characteristics that toughness is good and spring rate is large, the good stability of wear-resisting, heat-resisting, cold-resistant, oil resistant, chemistry.The heating surface temperature is the highest to be no more than 40 ℃~50 ° C, not spontaneous combustion, do not reveal, leakproof, its breakdown voltage is more than the 3750V, so operation does not have the danger of puncture under the voltage of 220V.So thermal source layer 2 can safe operation under-40 ℃~80 ℃ environment, guaranteed the security performance of gutter snow melting system.
Earth leakage protective layer 3 of the present invention is steel wire establishment wire lath, and conductance is high, and is corrosion-resistant, high temperature resistant, can antistatic, leakage current is imported the earth, and play the safeguard protection effect.
As shown in Figure 3, be provided with circuit board in the temperature control box 4 of the present invention, include keyboard and temperature pick up on the circuit board, its input signal enters in the cpu control circuit to be processed, and the data after then will processing are input to display circuit and control output circuit and show and export control; Also be provided with power circuit and timing circuit on the circuit board, power circuit provides power supply for cpu control circuit, and timing circuit provides time data for the control output circuit.This temperature control box has snow melt time and the control of snow melt temperature dual.Input snow melt time and snow melt temperature by described keyboard, and shown by display circuit.By the temperature of temperature sensor measurement snow melting panel, convert the temperature signal of snow melting panel to the signal of telecommunication, be input to and carry out data in the cpu control circuit and process, and shown the temperature of current snow melting panel by display circuit.Power circuit provides power supply for whole temperature control system.The timing circuit real-time judge snow melt time is when system arrives the snow melt set during the time, the snow melting panel stopped heating.The snow melt that does not reach setting when system is during the time, and system will continue to judge the snow melt temperature of setting.When the temperature of snow melting panel reaches the temperature of setting, will close snow melting panel power supply stopped heating.When the temperature of snow melting panel does not reach design temperature, will open the snow melting panel power supply and heat.
As shown in Figure 5, the cpu pcb in temperature control box 4 is provided with: 1) charactron DS1, DS2 and DS3, its model is: SN420362K is used for the demonstration to the temperature setting upper limit, lowest temperature and temperature.
2) LD1~LD6, its display working condition are followed successively by startup 1, startup 2, state, temperature 1, temperature 2 and power supply.
3) on ﹠ off switch K1~K6 is followed successively by switch, setting, rise, downward modulation, switching, determines.
4) CPU IC2: its model is CPU16F73, has host control program, finishes the control of whole system, has auto-reset function, has guaranteed Systems balanth.
5) IC1 is 8 bit shift register, and its model is 74HC595, has the ternary output function.
6) holder IC3, its model is the 1K serial EEPROM holder of 93C46, is used for storing temperature setting value and state of temperature.
1,2 and 5 pin by J1 are introduced power supply from power circuit, are whole circuit supply.By the snow melt temperature that K1~K6 key assignments needs, comprise the upper limit and the lower limit of its temperature, its temperature value is shown by DS2 and DS3, and is stored into holder IC3(93C46) in.Temperature pick up is by 7,8, the 10 pins access of J1, through register IC1(74HC595), be input to CPU IC3(16F73) carrying out the data processing, its temperature value shows that by DS1 relay indicating light LD3-LD6 lights simultaneously.When the temperature of DS1 was lower than the temperature of DS2, CPU IC3 exported start signal to the control output circuit of power panel by 3 and 4 pin of J1, and relay indicating light LD1 and LD2 light simultaneously, expression beginning snow melt.When the temperature of DS1 was higher than the temperature of DS3, CPU IC3 exported shutdown signal to the control output circuit of power panel by 3 and 4 pin of J1, and relay indicating light LD1 and LD2 extinguish simultaneously, and expression stops snow melt.
As shown in Figure 4, circuit board is provided with power circuit, and the AC8V power supply accesses from J1, by rectification circuit D5~D8 and filter capacitor C5 and C6, through mu balanced circuit IC1(LM7805), form dc source, 1,2 and 5 pin by J3 are the whole system power supply.
As shown in Figure 6, also be provided with the control output circuit on the power panel, by control output signal control relay T3 and the T4 of 3 and 4 pin of J3, the power supply of opening and closing snow melting panel.
As shown in Figure 7, the timing circuit plate in temperature control box 4 is provided with timing circuit: 1) charactron DS1, DS2 and DS3, its model is: SN420362K is used for the demonstration to the snow melt time.
2) LD1, LD2, display working condition.
3) on ﹠ off switch S1~S5 is followed successively by switch, setting, rise, downward modulation, determines.
4) be the CPU of timing circuit U1(PIC16f873), have timer control routine.
Set the snow melt time by on ﹠ off switch S1~S5, by CPU(PIC16f873) carry out the data processing and by the control circuit of J1 output start signal to power panel, represent the beginning snow melt.Carry out time showing (take hour as unit) by DS1, DS2 and DS3, the per flicker in 1 second of LD1, LD2 once, the expression timing system is normally moved.When DS1, DS2 and DS3 showed 000, CPU was by the control circuit of J1 output shutdown signal to power panel, and LD1, LD2 stop flicker, and expression stops snow melt.
As shown in Figure 8, the program in the described temperature control box 4 is carried out following steps: 0) opening control system.
1) sets snow melt temperature and snow melt time.
2) system detects and whether arrives the snow melt time of setting, and sets the snow melt time if arrive, and will close the snow melting panel power supply, stopped heating, and snow melt finishes.If do not reach the snow melt time of setting, continue to detect whether to reach and set the snow melt temperature.
3) whether system detects to reach and sets the snow melt temperature, sets the snow melt temperature if arrive, and will close the snow melting panel power supply, and then stopped heating enters 2) step.If do not arrive and set the snow melt temperature, will open the snow melting panel power supply, heat, then enter 2) step.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.