CN105528007A - Power control device and method for disinfection cabinet and disinfection cabinet - Google Patents
Power control device and method for disinfection cabinet and disinfection cabinet Download PDFInfo
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- CN105528007A CN105528007A CN201510979786.0A CN201510979786A CN105528007A CN 105528007 A CN105528007 A CN 105528007A CN 201510979786 A CN201510979786 A CN 201510979786A CN 105528007 A CN105528007 A CN 105528007A
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- 238000004659 sterilization and disinfection Methods 0.000 title claims abstract description 130
- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000001514 detection method Methods 0.000 claims abstract description 54
- 238000010438 heat treatment Methods 0.000 claims abstract description 32
- 230000000630 rising effect Effects 0.000 claims description 28
- 230000008569 process Effects 0.000 claims description 18
- 230000003111 delayed effect Effects 0.000 claims description 9
- 230000006870 function Effects 0.000 claims description 8
- 230000000694 effects Effects 0.000 abstract description 7
- 230000001276 controlling effect Effects 0.000 description 12
- 230000009467 reduction Effects 0.000 description 6
- 230000000249 desinfective effect Effects 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 208000032365 Electromagnetic interference Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012905 input function Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/12—Regulating voltage or current wherein the variable actually regulated by the final control device is ac
- G05F1/14—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using tap transformers or tap changing inductors as final control devices
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
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- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Apparatus For Disinfection Or Sterilisation (AREA)
Abstract
The invention provides a power control device and method of a disinfection cabinet and the disinfection cabinet. Wherein the device includes: the zero-crossing detection circuit is used for detecting the zero-crossing point of the alternating current waveform and generating a PWM waveform according to the alternating current waveform; the control unit is connected with the zero-crossing detection circuit and used for acquiring a zero-crossing point and a PWM waveform, and adjusting the PWM waveform according to the zero-crossing point of the alternating current waveform to generate a PWM adjustment waveform; the control unit is also used for generating a control signal for controlling the actuating mechanism according to the PWM adjusting waveform; and the actuating mechanism is connected with the control unit and used for controlling the heating power of the disinfection cabinet according to the control signal. The power control device and the method of the disinfection cabinet greatly reduce EMI interference, enhance the stability of the circuit and meet the requirements of products. The hardware circuit in the disinfection cabinet is simple, no additional electric device is added, and the effect of saving cost is achieved.
Description
Technical field
The present invention relates to the sterilizing equipment decontaminating apparatus technical field of tableware, particularly relate to a kind of output control device of disinfection cabinet and method and disinfection cabinet.
Background technology
Tableware disinfector safety and health requires sterilisation temp and the disinfecting time of (standard No.: GB17988-2008) clear stipulaties disinfection cabinet: in a star disinfection cabinet, sterilisation temp should be more than or equal to 100 DEG C, and disinfecting time should be more than or equal to 15 minutes; In two star disinfection cabinets, disinfecting time should be more than or equal to 120 DEG C, and disinfecting time should be more than or equal to 20 minutes.
Traditional disinfection cabinet carries out power in the following ways and controls with the object reaching temperature control, thus realizes the requirement meeting disinfection cabinet country test stone.The first controls output power by the frequent break-make of components and parts, although the effect of temperature control can be reached, for non-purely resistive load the frequent break-make of components and parts can produce very serious electromagnetic interference (EMI), affect the stability of circuit and the performance of product.The second adopts controllable silicon to realize the adjustment of power by the method for copped wave or zero passage detection, although FR power adjustments can be realized, but very serious electromagnetic interference (EMI) can be produced by the method for copped wave, cause EMI (ElectroMagneticInterference, electromagnetic interference (EMI)) detect defective, although can not electromagnetic interference (EMI) be produced in theory by the method for zero passage detection, but the components and parts with switching characteristic still have certain pressure drop when conducting, when the time interval is very short, even small voltage, also can produce very serious electromagnetism to infect, affect EMI test result, cause test result defective.
Summary of the invention
Given this, be necessary the problem that can produce very serious electromagnetic interference (EMI) for conventional power adjustment, provide a kind of power reducing the disinfection cabinet of the electromagnetic interference (EMI) that regulating circuit produces to control control device and method and disinfection cabinet.
For reaching goal of the invention, provide a kind of output control device of disinfection cabinet, described device comprises:
Zero cross detection circuit, for detecting the zero crossing of ac power waveform, and generates PWM waveform according to described ac power waveform;
Control module, is connected with described zero cross detection circuit, for obtaining described zero crossing and described PWM waveform, and adjusts described PWM waveform according to the zero crossing of described ac power waveform, generates PWM and adjusts waveform;
Described control module also generates for adjusting waveform according to described PWM the control signal controlling topworks;
Described topworks, for being connected with described control module, for controlling the heating power of described disinfection cabinet according to described control signal.
Wherein in an embodiment, described control module is also for obtaining the zero crossing of described ac power waveform that described zero cross detection circuit detects and the described PWM waveform that described zero cross detection circuit generates; Delay time corresponding to described PWM waveform and retardation time is obtained according to the zero crossing of described ac power waveform and described PWM waveshape, wherein, described delay time is the difference of time corresponding with the rising edge of adjacent described PWM waveform time that the zero crossing of described ac power waveform is corresponding, and described retardation time is the difference of time corresponding with the zero crossing of adjacent described ac power waveform time that the negative edge of described PWM waveform is corresponding; Delay process is carried out to described delay time, delayed process is carried out to described retardation time, make the rising edge of described PWM waveform and negative edge level off to the zero crossing of described ac power waveform, thus generate described PWM and adjust waveform.
Wherein in an embodiment, described topworks comprises:
Device for power switching, is connected with described control module, for being turned on or off under the control of said control signal;
Heater element, is connected with described device for power switching, is arranged in the disinfection room of described disinfection cabinet, for heating described disinfection room when described device for power switching conducting.
Wherein in an embodiment, also comprise:
Temperature detecting unit, is connected with described control module, is arranged in the disinfection room of described disinfection cabinet, for detecting the temperature in described disinfection room;
Described control module, also for gathering the temperature in the described disinfection room of described temperature detecting unit detection, compares the temperature in described disinfection room and preset temperature threshold value; If the temperature in described disinfection room is more than or equal to described preset temperature threshold value, is then stopped by described topworks or reduce the heating power to described disinfection cabinet; If the temperature in described disinfection room is less than described preset temperature threshold value, then increased the heating power of described disinfection cabinet by described topworks.
Wherein in an embodiment, also comprise:
Human-machine interface unit, is connected with described control module, for providing input/output function and prompt functions.
Wherein in an embodiment, also comprise:
Power supply unit, be connected with described zero cross detection circuit, described control module, described topworks, temperature detecting unit and human-machine interface unit respectively, for described ac power waveform being converted to the voltage needed for described zero cross detection circuit, described control module, described topworks, described temperature detecting unit and described human-machine interface unit.
The present invention also provides a kind of Poewr control method of disinfection cabinet, and described method comprises:
Zero cross detection circuit detects the zero crossing of ac power waveform, and exports PWM waveform to control module according to described ac power waveform;
Described control module obtains described zero crossing and described PWM waveform, and adjusts described PWM waveform according to the zero crossing of described ac power waveform, generates PWM and adjusts waveform;
Described control module adjusts waveform according to described PWM and generates the control signal controlling topworks;
Described topworks controls the heating power of described disinfection cabinet according to described control signal.
Wherein in an embodiment, described control module obtains described zero crossing and described PWM waveform, and adjusts described PWM waveform according to the zero crossing of described ac power waveform, and the step generating PWM adjustment waveform comprises:
Obtain the zero crossing of the described ac power waveform that described zero cross detection circuit detects and the described PWM waveform of described zero cross detection circuit generation;
Delay time corresponding to described PWM waveform and retardation time is obtained according to the zero crossing of described ac power waveform and described PWM waveshape, wherein, described delay time is the difference of time corresponding with the rising edge of adjacent described PWM waveform time that the zero crossing of described ac power waveform is corresponding, and described retardation time is the difference of time corresponding with the zero crossing of adjacent described ac power waveform time that the negative edge of described PWM waveform is corresponding;
Delay process is carried out to described delay time, delayed process is carried out to described retardation time, make the rising edge of described PWM waveform and the zero crossing of negative edge convergence and described ac power waveform, thus generate described PWM adjustment waveform.
Wherein in an embodiment, also comprise:
Temperature detecting unit detects the temperature in the disinfection room of disinfection cabinet;
Control module gathers the temperature in described disinfection room, and the temperature in described disinfection room and preset temperature threshold value is compared; If the temperature in described disinfection room is more than or equal to described preset temperature threshold value, is then stopped by described topworks or reduce the heating power to described disinfection cabinet; If the temperature in described disinfection room is less than described preset temperature threshold value, then increased the heating power of described disinfection cabinet by described topworks.
The present invention also provides a kind of disinfection cabinet, comprising:
Zero cross detection circuit, for detecting the zero crossing of ac power waveform, and generates PWM waveform according to described ac power waveform;
Control module, is connected with described zero cross detection circuit, for obtaining described zero crossing and described PWM waveform, and adjusts described PWM waveform according to the zero crossing of described ac power waveform, generates PWM and adjusts waveform;
Described control module also generates for adjusting waveform according to described PWM the control signal controlling topworks;
Described topworks, for being connected with described control module, for controlling the heating power of described disinfection cabinet according to described control signal.
Beneficial effect of the present invention comprises:
The output control device of above-mentioned disinfection cabinet and method and disinfection cabinet, zero crossing according to ac power waveform adjusts the PWM waveform that zero cross detection circuit feeds back, make the rising edge of PWM waveform and negative edge as much as possible close to the zero crossing of alternating current, obtain PWM and adjust waveform, and then adjust waveform generation control signal according to PWM, control topworks and provide heating power for disinfection cabinet, because the rising edge of the PWM waveform after being adjusted by control module and negative edge are as much as possible close to the zero crossing of ac power waveform, therefore can disturb the reduction EMI of high degree, the stability of intensifier circuit, meet the demand of product.Further, the hardware circuit in the present embodiment is simple, does not increase extra voltage, current detection circuit, does not also increase extra filtering device, reach cost-saving effect.
Accompanying drawing explanation
Fig. 1 is the structural representation of the output control device of disinfection cabinet in an embodiment;
Fig. 2 is the structural representation of the output control device of disinfection cabinet in another embodiment;
Fig. 3 is the modulation waveform schematic diagram of the output control device of disinfection cabinet in an embodiment;
Fig. 4 is the schematic flow sheet of the Poewr control method of disinfection cabinet in an embodiment.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the output control device of disinfection cabinet of the present invention and method and disinfection cabinet are further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
In one embodiment, as shown in Figure 1, provide a kind of output control device of disinfection cabinet, this device comprises: zero cross detection circuit 100, for detecting the zero crossing of ac power waveform, and generate PWM (PulseWidthModulation, pulse-length modulation) waveform according to ac power waveform.Control module 200, is connected with zero cross detection circuit 100, for obtaining zero crossing and PWM waveform, and adjusts PWM waveform according to the zero crossing of ac power waveform, generates PWM and adjusts waveform.Control module 200 also generates for adjusting waveform according to PWM the control signal controlling topworks 300.Topworks 300, for being connected with control module 200, for controlling the heating power of disinfection cabinet according to control signal.
In the present embodiment, when alternating current (civil power) inputs zero cross detection circuit 100, the positive half cycle of ac power waveform makes the components and parts conducting in over-current detection circuit, the voltage of the input port of control module is dragged down, the now input port input low-voltage of control module 200, the negative half period of ac power waveform makes the components and parts in over-current detection circuit 100 end, the voltage of the input port of control module 200 is raised by external power source, the now input port input high level of control module, such alternating current is just converted to the PWM waveform of control module 200 input port after by over-current detection circuit 100.If the components and parts in over-current detection circuit do not have conduction voltage drop when conducting, the then rising edge of PWM waveform and the zero crossing (the integral multiple moment of π) of the corresponding ac power waveform of negative edge, but in the application process of reality, the conduction voltage drop of components and parts cannot be avoided, so the zero crossing of the not corresponding alternating current of the rising edge of PWM waveform and negative edge, cut-off time delay has been there is like this at the rising edge of PWM waveform, occur that conducting is delayed at the negative edge of PWM waveform, thus serious voltage change ratio has been there is near the rising edge and negative edge of PWM waveform, showing is exactly current spike interference, when doing EMI test, current spike interference can have a strong impact on test result, cause EMI test failure.
In order to overcome reduction current spike, reduce electromagnetic interference (EMI), EMI is tested and meets test request as far as possible, control module in the present embodiment adjusts the PWM waveform that zero cross detection circuit feeds back according to the zero crossing of ac power waveform, make the rising edge of PWM waveform and negative edge as much as possible close to the zero crossing of alternating current, obtain PWM and adjust waveform, and then adjust waveform generation control signal according to PWM, control topworks 300 and provide heating power for disinfection cabinet, because the rising edge of the PWM waveform after being adjusted by control module and negative edge are as much as possible close to the zero crossing of ac power waveform, therefore can disturb the reduction EMI of high degree, the stability of intensifier circuit, meet the demand of product.Further, the hardware circuit in the present embodiment is simple, does not increase extra voltage, current detection circuit, does not also increase extra filtering device, reach cost-saving effect.
Wherein, control module 200 comprises MCU (MicrocontrollerUnit, micro-control unit).
Concrete, in one embodiment, see Fig. 2, control module 200 is also for obtaining the zero crossing of ac power waveform that zero cross detection circuit 100 detects and the PWM waveform that zero cross detection circuit generates, delay time corresponding to PWM waveform and retardation time is obtained according to the zero crossing of ac power waveform and PWM waveshape, wherein, delay time is the difference of time corresponding with the rising edge of adjacent PWM waveform time that the zero crossing of described ac power waveform is corresponding, retardation time is the difference of time corresponding with the zero crossing of adjacent ac power waveform time that the negative edge of PWM waveform is corresponding, delay process is carried out to delay time, delayed process is carried out to retardation time, make the rising edge of PWM waveform and the zero crossing of negative edge convergence and ac power waveform, thus generate PWM adjustment waveform.
For the present embodiment, in composition graphs 3 1.-be 5. described in detail, 1. in Fig. 3 is the input waveform of zero cross detection circuit 100, i.e. ac power waveform, zero cross detection circuit 100 detects the zero crossing of ac power waveform, and generate PWM waveform according to ac power waveform and feed back to control module 200, because components and parts exist forward voltage, for interval t0-t2 when conducting, when interval t0-t1, components and parts are in conducting state, in the t1 moment, owing to there is conduction voltage drop, U in figure
nfor conduction voltage drop, wherein n is 0, 1, 2, 3 components and parts end at the moment, but the now corresponding moment is not but the zero crossing of ac power waveform, there is cut-off time delay in the rising edge of PWM waveform, delay time is (t11-t1), in like manner, at the conducting of t2 moment components and parts (originally should in the t22 moment with regard to conducting), occur that conducting is delayed at the negative edge of PWM waveform, retardation time is (t2-t22), serious voltage change ratio has been there is like this at the rising edge of PWM waveform and negative edge, embodying is exactly current spike interference (i=C △ U/ △ t, wherein △ U=U
2n-1-0, △ t=m π-tm, m be 1,3,5,7...) or (i=C △ U/ △ t, wherein △ U=U
2n-0, △ t=tk-k π, k be 0,2,4,6...), owing to there is current spike interference, its test result will be affected when doing EMI test, causing EMI test failure.
Because the forward voltage of the components and parts in zero cross detection circuit is not identical, therefore control module also has change in various degree when processing delay time and retardation time.For Fig. 3, as can be known from Fig. 3, it is exactly the delay time t11-t1 calculated that voltage drops to the required time from U1, can obtain voltage equally from 0 time risen to needed for U2 is exactly t2-t22 retardation time, control module 200 is after obtaining PWM waveform 2. shown in figure, automatically delay process will be carried out to delay time t11-t1, delayed process is carried out to 2t2-t22 retardation time, object allows △ U be tending towards 0 as much as possible, namely the rising edge of PWM waveform and negative edge is allowed to level off to the zero crossing of ac power waveform, namely the rising edge of PWM waveform is allowed to level off to the t11 moment, the negative edge of PWM waveform levels off to the t22 moment, now control module 200 obtains PWM 3. shown in figure and adjusts waveform, adjusting waveform according to PWM 3. shown in figure obtains comparatively close to judging the zero point of ac power waveform zero crossing, and then in output map 4. shown in the control waveform of control topworks 300, be equivalent to control signal, when control waveform is high level, topworks 300 works, when control waveform is low level, topworks 300 does not work, 5. the waveform of topworks's real output is depicted as in figure.So just can reach reduction current spike, reduce electromagnetic interference (EMI), the effect of As soon as possible Promising Policy EMI test request.
What deserves to be explained is, above-described embodiment can not eliminate the impact of △ U completely, and concrete degree delay time and the process of retardation time need to modify according to the test result of EMI.
In one embodiment, topworks 300 comprises: device for power switching 310, is connected with control module 200, for being turned on or off under control of the control signal.Heater element 320, is connected with device for power switching 310, is arranged in the disinfection room of disinfection cabinet, for heating disinfection room when device for power switching 310 conducting.
Control module 200, by controlling the heating power of the ON time control heater part of device for power switching, realizes accurate control of the disinfection room temperature to disinfection cabinet.In a specific embodiment, device for power switching 310 and heater element 320 are multiple, and multiple heater element 320 and multiple device for power switching 310 one_to_one corresponding, carry out handle control with temperature indoor to sterilization more accurately.Wherein, the disinfection room of disinfection cabinet is lower floor's cabinet room of disinfection cabinet.
Preferably, in one embodiment, heater element 320 is resistive heater part.Avoid the frequent break-make of device for power switching 310 to make it produce serious electromagnetic interference (EMI), reduce the impact of electromagnetic interference (EMI) further.
What deserves to be explained is, device for power switching 310 is preferably controllable silicon, and heater element 320 is preferably high temperature carbon element pipe.
In one embodiment, also comprise: temperature detecting unit 400, be connected with control module 200, be arranged in the disinfection room of disinfection cabinet, for detecting the temperature in disinfection room.Control module 200, also for the temperature in the disinfection room of collecting temperature detecting unit 400 detection, compares the temperature in disinfection room and preset temperature threshold value; If the temperature in described disinfection room is more than or equal to preset temperature threshold value, is then stopped by topworks or reduce the heating power to disinfection cabinet; If the temperature in disinfection room is less than preset temperature threshold value, then increased the heating power of disinfection cabinet by topworks.
Temperature in the disinfection room detected by temperature detecting unit 400 in above-described embodiment and the heating power of preset temperature threshold value to disinfection cabinet are regulated, and reach the effect of accurate temperature controlling.Meanwhile, if when heater element 320 is high temperature carbon element pipe, to the accurate phenomenon can effectively preventing the heating temperatures that causes due to carbon element pipe waste heat upper punch excessive control of temperature.Further, because it can carry out corresponding power adjustments according to the temperature in disinfection room, device for power switching, without the need to break-make frequently, effectively protects device for power switching, the serviceable life of the device for power switching greatly improved.
In one embodiment, also comprise: human-machine interface unit 500, be connected with control module 200, for providing input/output function and prompt functions.
Concrete, human-machine interface unit 500 comprises keyboard input module, display module and Buzzing module, keyboard input module provides input function for device, display module provides output function for device, for duty, the gear and alarm lamp light on and off etc. of display device, Buzzing module mainly plays the function of button prompting and alarm.
In one embodiment, also comprise: power supply unit 600, be connected with zero cross detection circuit 100, control module 200, topworks 300, temperature detecting unit 400 and human-machine interface unit 500 respectively, for ac power waveform being converted to the voltage needed for zero cross detection circuit 100, control module 200, topworks 300, temperature detecting unit 400 and human-machine interface unit 500.
In one embodiment, as shown in Figure 4, additionally provide a kind of Poewr control method of disinfection cabinet, the method comprises:
S100, zero cross detection circuit detects the zero crossing of ac power waveform, and exports PWM waveform to control module according to described ac power waveform.
S200, control module obtains zero crossing and PWM waveform, and adjusts PWM waveform according to the zero crossing of ac power waveform, generates PWM and adjusts waveform.
S300, control module adjusts waveform according to PWM and generates the control signal controlling topworks;
S400, topworks controls the heating power of disinfection cabinet according to control signal.
The Poewr control method of the disinfection cabinet in the present embodiment, zero crossing according to ac power waveform adjusts the PWM waveform that zero cross detection circuit feeds back, make the rising edge of PWM waveform and negative edge as much as possible close to the zero crossing of alternating current, obtain PWM and adjust waveform, and then adjust waveform generation control signal according to PWM, control topworks 300 and provide heating power for disinfection cabinet, because the rising edge of the PWM waveform after being adjusted by control module and negative edge are as much as possible close to the zero crossing of ac power waveform, therefore can disturb the reduction EMI of high degree, the stability of intensifier circuit, meet the demand of product.
In one embodiment, step S200 comprises:
S210, obtains the zero crossing of the described ac power waveform that zero cross detection circuit detects and the described PWM waveform of described zero cross detection circuit generation.
S220, delay time corresponding to PWM waveform and retardation time is obtained according to the zero crossing of ac power waveform and PWM waveshape, wherein, delay time is the difference of time corresponding with the rising edge of adjacent PWM waveform time that the zero crossing of described ac power waveform is corresponding, and retardation time is the difference of time corresponding with the zero crossing of adjacent ac power waveform time that the negative edge of described PWM waveform is corresponding.
S230, carries out delay process to delay time, carries out delayed process to retardation time, makes the rising edge of PWM waveform and the zero crossing of negative edge convergence and ac power waveform, thus generates PWM adjustment waveform.
In one embodiment, also comprise:
Temperature detecting unit detects the temperature in the disinfection room of disinfection cabinet.
Control module gathers the temperature in disinfection room, and the temperature in disinfection room and preset temperature threshold value is compared; If the temperature in disinfection room is more than or equal to described preset temperature threshold value, is then stopped by described topworks or reduce the heating power to described disinfection cabinet; If the temperature in disinfection room is less than described preset temperature threshold value, then by described topworks for described disinfection cabinet provides corresponding heating power.
The principle of dealing with problems due to this system is similar to the output control device of aforementioned a kind of disinfection cabinet, and therefore the enforcement of the method see the enforcement of aforementioned means, can repeat part and repeat no more.
One of ordinary skill in the art will appreciate that all or part of flow process realized in above-described embodiment method, that the hardware that can carry out instruction relevant by computer program has come, described program can be stored in a computer read/write memory medium, this program, when performing, can comprise the flow process of the embodiment as above-mentioned each side method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-OnlyMemory, ROM) or random store-memory body (RandomAccessMemory, RAM) etc.
In one embodiment, a kind of disinfection cabinet being also provided, comprising: zero cross detection circuit 100, for detecting the zero crossing of ac power waveform, and generating PWM waveform according to ac power waveform.Control module 200, is connected with zero cross detection circuit 100, for obtaining zero crossing and PWM waveform, and adjusts PWM waveform according to the zero crossing of ac power waveform, generates PWM and adjusts waveform.Control module 200 also generates for adjusting waveform according to PWM the control signal controlling topworks.Topworks 300, for being connected with control module 200, for controlling the heating power of disinfection cabinet according to control signal.
Disinfection cabinet in the present embodiment adjusts the PWM waveform that zero cross detection circuit feeds back according to the zero crossing of ac power waveform, make the rising edge of PWM waveform and negative edge as much as possible close to the zero crossing of alternating current, obtain PWM and adjust waveform, and then adjust waveform generation control signal according to PWM, control topworks and provide heating power for disinfection cabinet, because the rising edge of the PWM waveform after being adjusted by control module and negative edge are as much as possible close to the zero crossing of ac power waveform, therefore can disturb the reduction EMI of high degree, the stability of intensifier circuit, meet the demand of product.Further, the disinfection cabinet hardware circuit in the present embodiment is simple, does not increase extra voltage, current detection circuit, does not also increase extra filtering device, reach cost-saving effect.
Each technical characteristic of the above embodiment can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, be all considered to be the scope that this instructions is recorded.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be construed as limiting the scope of the patent.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. an output control device for disinfection cabinet, is characterized in that, described device comprises:
Zero cross detection circuit (100), for detecting the zero crossing of ac power waveform, and generates PWM waveform according to described ac power waveform;
Control module (200), is connected with described zero cross detection circuit (100), for obtaining described zero crossing and described PWM waveform, and adjusts described PWM waveform according to the zero crossing of described ac power waveform, generates PWM and adjusts waveform;
Described control module (200) also generates for adjusting waveform according to described PWM the control signal controlling topworks (300);
Described topworks (300), for being connected with described control module (200), for controlling the heating power of described disinfection cabinet according to described control signal.
2. the output control device of disinfection cabinet according to claim 1, it is characterized in that, described control module (200) is also for obtaining the zero crossing of described ac power waveform that described zero cross detection circuit detects and the described PWM waveform that described zero cross detection circuit generates; Delay time corresponding to described PWM waveform and retardation time is obtained according to the zero crossing of described ac power waveform and described PWM waveshape, wherein, described delay time is the difference of time corresponding with the rising edge of adjacent described PWM waveform time that the zero crossing of described ac power waveform is corresponding, and described retardation time is the difference of time corresponding with the zero crossing of adjacent described ac power waveform time that the negative edge of described PWM waveform is corresponding; Delay process is carried out to described delay time, delayed process is carried out to described retardation time, make the rising edge of described PWM waveform and negative edge level off to the zero crossing of described ac power waveform, thus generate described PWM and adjust waveform.
3. the output control device of disinfection cabinet according to claim 1, is characterized in that, described topworks (300) comprising:
Device for power switching (310), is connected with described control module (200), for being turned on or off under the control of said control signal;
Heater element (320), is connected with described device for power switching (310), is arranged in the disinfection room of described disinfection cabinet, for heating described disinfection room when described device for power switching (310) conducting.
4. the output control device of disinfection cabinet according to any one of claims 1 to 3, is characterized in that, also comprise:
Temperature detecting unit (400), is connected with described control module (200), is arranged in the disinfection room of described disinfection cabinet, for detecting the temperature in described disinfection room;
Described control module (200), also for gathering the temperature in described disinfection room that described temperature detecting unit (400) detects, compares the temperature in described disinfection room and preset temperature threshold value; If the temperature in described disinfection room is more than or equal to described preset temperature threshold value, is then stopped by described topworks or reduce the heating power to described disinfection cabinet; If the temperature in described disinfection room is less than described preset temperature threshold value, then increased the heating power of described disinfection cabinet by described topworks.
5. the output control device of disinfection cabinet according to any one of claims 1 to 3, is characterized in that, also comprise:
Human-machine interface unit (500), is connected with described control module (200), for providing input/output function and prompt functions.
6. the output control device of the disinfection cabinet according to any one of claims 1 to 3, is characterized in that, also comprises:
Power supply unit (600), be connected with described zero cross detection circuit (100), described control module (200), described topworks (300), temperature detecting unit (400) and human-machine interface unit (500) respectively, for described ac power waveform being converted to the voltage needed for described zero cross detection circuit (100), described control module (200), described topworks (300), described temperature detecting unit (400) and described human-machine interface unit (500).
7. a Poewr control method for disinfection cabinet, is characterized in that, described method comprises:
Zero cross detection circuit detects the zero crossing of ac power waveform, and exports PWM waveform to control module according to described ac power waveform;
Described control module obtains described zero crossing and described PWM waveform, and adjusts described PWM waveform according to the zero crossing of described ac power waveform, generates PWM and adjusts waveform;
Described control module adjusts waveform according to described PWM and generates the control signal controlling topworks;
Described topworks controls the heating power of described disinfection cabinet according to described control signal.
8. the Poewr control method of disinfection cabinet according to claim 7, it is characterized in that, described control module obtains described zero crossing and described PWM waveform, and adjusts described PWM waveform according to the zero crossing of described ac power waveform, and the step generating PWM adjustment waveform comprises:
Obtain the zero crossing of the described ac power waveform that described zero cross detection circuit detects and the described PWM waveform of described zero cross detection circuit generation;
Delay time corresponding to described PWM waveform and retardation time is obtained according to the zero crossing of described ac power waveform and described PWM waveshape, wherein, described delay time is the difference of time corresponding with the rising edge of adjacent described PWM waveform time that the zero crossing of described ac power waveform is corresponding, and described retardation time is the difference of time corresponding with the zero crossing of adjacent described ac power waveform time that the negative edge of described PWM waveform is corresponding;
Delay process is carried out to described delay time, delayed process is carried out to described retardation time, make the rising edge of described PWM waveform and the zero crossing of negative edge convergence and described ac power waveform, thus generate described PWM adjustment waveform.
9. the Poewr control method of disinfection cabinet according to claim 7, is characterized in that, also comprises:
Temperature detecting unit detects the temperature in the disinfection room of disinfection cabinet;
Control module gathers the temperature in described disinfection room, and the temperature in described disinfection room and preset temperature threshold value is compared; If the temperature in described disinfection room is more than or equal to described preset temperature threshold value, is then stopped by described topworks or reduce the heating power to described disinfection cabinet; If the temperature in described disinfection room is less than described preset temperature threshold value, then increased the heating power of described disinfection cabinet by described topworks.
10. a disinfection cabinet, is characterized in that, comprising:
Zero cross detection circuit (100), for detecting the zero crossing of ac power waveform, and generates PWM waveform according to described ac power waveform;
Control module (200), is connected with described zero cross detection circuit (100), for obtaining described zero crossing and described PWM waveform, and adjusts described PWM waveform according to the zero crossing of described ac power waveform, generates PWM and adjusts waveform;
Described control module (200) also generates for adjusting waveform according to described PWM the control signal controlling topworks (300);
Described topworks (300), for being connected with described control module (200), for controlling the heating power of described disinfection cabinet according to described control signal.
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