CN1144004C

CN1144004C - Stepless temperature regulating electronic thermostat

Info

Publication number: CN1144004C
Application number: CNB021105294A
Authority: CN
Inventors: 岑礼昌
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-01-10
Filing date: 2002-01-10
Publication date: 2004-03-31
Anticipated expiration: 2022-01-10
Also published as: CN1361402A

Abstract

The present invention relates to a stepless temperature regulating electronic thermostat which belongs to the technical field of physical thermostats. The present invention mainly comprises a box body, a cold transmission device, heat electric coolers, a composite radiator, a fan, a radiator and a closed loop electronic control system, wherein the three heat electric coolers and the cold transmission device are arranged in the back inner side of the box body; the composite radiator is arranged on the back outer side of the box body; the composite radiator and the heat electric coolers face outside; other two heat electric coolers are arranged on the thrust root of the composite radiator; a radiator is arranged on the heating surfaces of the two heat electric coolers and produces composite peltier effect; the fan is arranged between the composite radiator and the radiator, and the wind direction is outward. The present invention has substantive features and obvious progress, an all-electronic system is in an environmental protection type and has no noise and no chemical component, the temperature control range is enlarged 0 to 50 DEG C, and the present invention has the advantages of stepless temperature control, long service life, no mechanical loss, high installation rate, convenient adjustment, reliability and high safety because of wide commercial power range of 220 Vac+/-20 % and normal work frequency of 47 to 63Hz.

Description

Electronics stepless temperature-regulating insulating box

Technical field

What the present invention relates to is a kind of insulating box, and particularly a kind of electronics stepless temperature-regulating insulating box belongs to the insulating box field of physics class.

Background technology

What traditional home appliance was used is fluorine Lyons preparation refrigeration, because it has destruction to ozone layer, is eliminated in succession.And the substitute that uses at present, yet exist little effect or the relatively poor shortcoming of serviceability to environment, therefore, develop a kind of superior performance, the insulating box technology of environmental sound has become an emphasis in global constant temperature technology scientific research field.Find by literature search, China Patent No.: 00225580.4, name is called: efficent electronic thermoelectric cooling, hot device, this patent readme is: efficent electronic thermoelectric cooling (heat) device, belong to refrigeration (heat) device of answering electricity consumption, and it is characterized in that electronics thermoelectric cooling (heat) element is provided with heat resistant layer, the heat-conducting area that makes element is less than its conductive area, element adopts welding or connects, and the circuit of thermocouple adopts and is connected in series in the thermoelectric pile, and suction (or putting) hot junction is adopted and is connected in parallel.The utlity model has little power consumption, the temperature difference is big, the high characteristics of refrigeration (heat) figure of merit, and its figure of merit can meet or exceed 13 * 10 ^-3K ^-1, maximum temperature difference can be higher than common components more than one times, and the thermoelectric pile device formed is in conjunction with firmly, reliable operation, long service life is applicable to freezing, refrigeration and aircondition, cold water water dispensers etc. are made refrigeration (heat) device.This patent is to wish to realize its effect by the raising of the power of TEC own, but actual the use do not realized its effect.

Summary of the invention

The present invention proceeds from the reality, defective at prior art, a kind of electronics stepless temperature-regulating insulating box is provided, according to peltier effect, mainly utilize the semiconductor heat element to form device energising refrigeration, heat refrigeration air cooling multiple level high-power compound energy assembly of redundant n+1 and the combination of closed loop electronic control technology by all-electronin, by the output of high frequency switch power pulse-width controlled, the size of current of control TEC and obtain the effect of constant temperature.The present invention mainly comprises: electronics stepless temperature-regulating insulating box belongs to the insulating box field of physics class.Mainly comprise: casing, closed loop electric-control system figure, cold junction heat-absorbing exchanger, TEC and composite heating radiator, fan and radiator, three TECs and cold junction heat-absorbing exchanger are positioned at behind the casing inboard, the outside was outside with the hot side of TEC after composite heating radiator was arranged on casing, in the bottom of composite heating radiator two TECs in addition are set, radiator is arranged on this and in addition produces compound peltier effect on the hot side of two TECs, fan is arranged in the middle of composite heating radiator and the radiator, and wind direction is outside, forms distinguished and admirable negative-feedback cooling.Radiator obtains 30 ℃ the temperature difference through TEC on composite heating radiator, this moment, fan was forced distinguished and admirable negative-feedback cooling, and wind blows to radiator to wind chill temperature and cools off by force through composite heating radiator, makes radiator temperature be lower than room temperature.Radiator temperature is low more, because the temperature difference is constant, thereby the composite radiating actuator temperature is just low more, and the above process that circulates forms the distinguished and admirable feedback of subzero temperature and obtains cooling.Low temperature on the composite heating radiator is through the hot side of TEC 5, make the cold junction heat-absorbing exchanger produce 30 ℃ the temperature difference, if during 30 ℃ of room temperatures, the cold junction heat-absorbing exchanger can obtain-30 ℃ Cryogenic air, under maximum temperature difference, could obtain maximum cooling power Qcmax (W).Owing to adopt TEC in the redundant n+1 energy combination of the multiple level of air cooling, be in operation bad one also can operate as normal, improved dependability greatly, reduce maintenance rate.Utilize the fan wind cooling that the Cryogenic air of composite heating radiator is flowed to radiator, form the negative-feedback of air cooling temperature stream.Make it to produce maximum temperature difference, obtain big cold power, and can save the heat radiation aluminium.

Closed loop electric-control system of the present invention mainly comprises: warm electric transducer, hand switch, bridge circuit, cold and hot control system, high frequency switch power PWM variable duration impulse system, the temperature digital display screen, the DC driven phase inverter, the redundant n+1 energy combination of the multiple level of high-power air cooling, its connected mode of closed loop electric-control system is: bridge circuit is obtained temperature by hand switch and is surveyed warm voltage Vf from setting voltage value Vi and warm electric transducer and connect to form bridge arm ratio, Vi subtracts the voltage of the bridge residual quantity Δ V1 output that Vf produces, and Fen Sanlu is connected to cold and hot control system, the input of high frequency switch power PWM variable duration impulse system and temperature digital display screen.By the cold and hot command signal of the output of cold and hot control system, be connected to the input of DC driven phase inverter, simultaneously direct-current switch power supply PWM variable duration impulse system output dc voltage is connected to other input of DC driven phase inverter, the output of the DC voltage of DC driven phase inverter is connected on five TEC line ends of the redundant n+1 energy combination of the multiple level of high-power air cooling, carries out refrigeration or heats.Cold and hot control system is made up of operational amplifier and comparator, its connected mode is: the Δ V1 that is produced by bridge circuit is connected to the input of the proportional integral difference channel that four operational amplifiers in the cold and hot control system form, the output of operational amplifier is connected to the input of the logic circuit of four comparators compositions, its output is connected to the input of DC driven phase inverter, realizes refrigeration or the control that heats.

When thermostatic box turns round, by adjusting desired temperature Vi is required spin manifold temperature, the corresponding temperature voltage Vf of spin manifold temperature probe confirms through cold and hot control system computing through the voltage difference Δ V1 that electric bridge produces, send signal and give direct-flow positive voltage or the negative voltage that drives phase inverter output, supply with the high-power thermoelectric cooling energy combination of the redundant n+1 of the multiple level of air cooling by high frequency switch power, be peak power refrigeration this moment, when the voltage Vf of temp probe and temperature setting voltage near or the magnitude of voltage of mutually produced simultaneously Δ V1, the output pulse width of control high frequency switch power narrows down, DC voltage reduces, the TEC electric current of energy combination diminishes, and cooling power diminishes, temperature voltage Vf until casing is identical with the temperature setting voltage, reaches the purpose of constant temperature.

The running of closed loop electric-control system is described: the electric bridge comparator of a, temperature given value Vi and actual casing temperature electricity value Vf.B, refrigeration thermal control system Δ V1 judge that by the result of computing difference the signal that freezes or heat drives phase inverter.C, high frequency switch power pulsewidth modulation by the pulsewidth of Δ V1 value control power supply, realize the variable of VDC output.D, LCD temperature digital display have manual, automatic temperature-controlled demonstration.E, driving phase inverter have soft start, current limliting, the anti-phase output function of DC voltage, are the best protection modes to TEC.F, the high-power thermoelectric cooling energy combination of the redundant n+1 of the multiple level of air cooling.

The present invention has substantive distinguishing features and marked improvement, all-electronic system environment-friendly type noiseless, does not have any chemical composition.Cooling and warming is integrated, and temperature-control range enlarges 0-50 ℃.Stepless temperature control, spin manifold temperature swing degree approaches straight line.Long-life: because all-electronic system theoretically, there is not mechanical loss in other electronic device life-spans more than 10 years except that fan.Installation rate height, debugging is convenient.Wide civil power scope 220Vac ± 20%, frequency 47-63Hz operate as normal.Can accomplish the 100Vac-300Vac scope if any specific (special) requirements.Save electric energy: except that starting to constant temperature point, electric energy saving is 30% of traditional type on constant temperature point.Use redundant n+1 technology, reliability is guaranteed.Security is good, utilization low dc voltage 12VI) C control.

Description of drawings

Fig. 1 structural representation side view of the present invention

Fig. 2 structural representation vertical view of the present invention

Fig. 3 closed loop electric-control system schematic diagram

The specific embodiment

As Fig. 1, Fig. 2 and shown in Figure 3, the present invention mainly comprises: casing 1, radiator 3, cold junction heat-absorbing exchanger 4, TEC 5 and 6, composite heating radiator 7, fan 8 and closed loop electric-control system, it is inboard that three TECs 5 and cold junction heat-absorbing exchanger 4 are positioned at casing 1 back, after composite heating radiator 7 is arranged on casing 1, the outside is outside with the hot side of TEC 5, in the bottom of composite heating radiator 7 two TECs 6 in addition are set, radiator 3 is arranged on the hot side of these other two TECs 6, it is middle with radiator 3 that fan 8 is arranged on composite heating radiator 7, and wind direction is outside.

Closed loop electric-control system of the present invention mainly comprises: warm electric transducer 9, hand switch 10, bridge circuit 11, cold and hot control system 12, high frequency switch power PWM variable duration impulse system 13, temperature digital display screen 14, DC driven phase inverter 15, the redundant n+1 energy combination 2 of the multiple level of high-power air cooling, its connected mode is: bridge circuit 11 is obtained temperature by hand switch 10 and is connected with the warm voltage Vf of warm electric transducer 9 actual measurements from setting voltage value Vi, form bridge arm ratio, Vi subtracts the voltage of the bridge residual quantity Δ V1 output that Vf produces, divide three the road to be connected to cold and hot control system 12, the input of high frequency switch power PWM variable duration impulse system 13 and temperature digital display screen 14, by the cold and hot command signal of the output of cold and hot control system 12, be connected to the input of DC driven phase inverter 15, simultaneously direct-current switch power supply PWM variable duration impulse system 13 output dc voltages are connected to other input of DC driven phase inverter 15, the output of the DC voltage of DC driven phase inverter 15 is connected on five TECs 5 and 6 line ends of the redundant n+1 energy combination 2 of the multiple level of high-power air cooling, carries out refrigeration or heats.

Cold and hot control system 12 is made up of operational amplifier 16 and comparator 17, its connected mode is: the Δ V1 that is produced by bridge circuit 11 is connected to the input of the proportional integral difference channel that four operational amplifiers 16 in the cold and hot control system 12 form, the output of operational amplifier 16 is connected to the input of the logic circuit of four comparators, 17 compositions, and its output is connected to the input of DC driven phase inverter 15.

Claims

1, a kind of electronics stepless temperature-regulating insulating box, comprise: casing (1), radiator (3), cold junction heat-absorbing exchanger (4), TEC (5) and (6), composite heating radiator (7), fan (8) and closed loop electric-control system, it is inboard to it is characterized in that three TECs (5) and cold junction heat-absorbing exchanger (4) are positioned at casing (1) back, after composite heating radiator (7) is arranged on casing (1), the outside is outside with the hot side of TEC (5), in the bottom of composite heating radiator (7) two TECs (6) in addition are set, radiator (3) is arranged on the hot side of these other two TECs (6), it is middle with radiator (3) that fan (8) is arranged on composite heating radiator (7), and wind direction is outside.

2, electronics stepless temperature-regulating insulating box according to claim 1, it is characterized in that the closed loop electric-control system comprises: warm electric transducer (9), hand switch (10), bridge circuit (11), cold and hot control system (12), high frequency switch power PWM variable duration impulse system (13), temperature digital display screen (14), DC driven phase inverter (15), the multiple redundant n+1 energy combination of level of high-power air cooling (2), its connected mode is: bridge circuit (11) is obtained temperature by hand switch (10) and is connected with the warm voltage Vf of warm electric transducer (9) actual measurement from setting voltage value Vi, form bridge arm ratio, Vi subtracts the voltage of the bridge residual quantity Δ V1 output that Vf produces, divide three the road to be connected to cold and hot control system (12), the input of high frequency switch power PWM variable duration impulse system (13) and temperature digital display screen (14), the cold and hot command signal of output by cold and hot control system (12), be connected to the input of DC driven phase inverter (15), simultaneously direct-current switch power supply PWM variable duration impulse system (13) output dc voltage is connected to other input of DC driven phase inverter (15), and the DC voltage output of DC driven phase inverter (15) is connected to the redundant n+1 energy of the multiple level of high-power air cooling and makes up on five TECs (5) and (6) line end of (2).

3, electronics stepless temperature-regulating insulating box according to claim 1, it is characterized in that cold and hot control system (12) is made up of operational amplifier (16) and comparator (17), its connected mode is: the Δ V1 that is produced by bridge circuit (11) is connected to the input of the proportional integral difference channel that four operational amplifiers (16) in the cold and hot control system (12) form, the output of operational amplifier (16) is connected to the input of the logic circuit of four comparators (17) composition, and its output is connected to the input of DC driven phase inverter (15).