CN102946679A - Respiration lamp control circuit and refrigerator with same - Google Patents

Respiration lamp control circuit and refrigerator with same Download PDF

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Publication number
CN102946679A
CN102946679A CN2012105125358A CN201210512535A CN102946679A CN 102946679 A CN102946679 A CN 102946679A CN 2012105125358 A CN2012105125358 A CN 2012105125358A CN 201210512535 A CN201210512535 A CN 201210512535A CN 102946679 A CN102946679 A CN 102946679A
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CN
China
Prior art keywords
breath light
control circuit
switching tube
controller
switch pipe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2012105125358A
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Chinese (zh)
Inventor
陈银飞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hefei Midea Refrigerator Co Ltd
Original Assignee
Hefei Midea Rongshida Refrigerator Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hefei Midea Rongshida Refrigerator Co Ltd filed Critical Hefei Midea Rongshida Refrigerator Co Ltd
Priority to CN2012105125358A priority Critical patent/CN102946679A/en
Publication of CN102946679A publication Critical patent/CN102946679A/en
Pending legal-status Critical Current

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Abstract

The invention provides a respiration lamp control circuit which comprises a first switching tube, a second switching tube and a controller, wherein the first switching tube is controlled by an input pulse, the second switching tube is controlled by the first switching tube, when the second switching tube is closed, a first input voltage can supply power for a respiration lamp, and the controller is used for providing the input pulse for the first switching tube. The respiration lamp control circuit provided by the embodiment of the invention has the advantages that the control circuit is simple, the chip requirements are not high, and the respiration lamp control circuit can be realized in a software control manner and is easy to realize, strong in adaptability, easy to popularize and low in cost. The invention also provides a refrigerator.

Description

A kind of breath light control circuit and have its refrigerator
Technical field
The present invention relates to the refrigerating system technical field, be specifically related to a kind of breath light control circuit and have the refrigerator of described breath light control circuit.
Background technology
Respiration lamp apparatus is applied to terminal equipment, LED(Light Emitting Diode in the device, light-emitting diode) brightness is finished under microcomputerized control by bright to dark gradually changing, breathe seemingly general, can provide visual cues at terminal equipment, play good visual decorative effect, the every field such as mobile phone, computer, automobile have been widely used in, but be used for increasing display effect at computer refrigerator and also rarely have application, and circuit structure more complicated, cost is higher, is not suitable for promoting.
Breath light product in the market adopts following dual mode control LED lamp usually:
(1) the PWM(Pulse Width Modulation by high frequency (more than the 10KHz), pulse-width modulation) work of control breath light, the shortcoming of the method is that the master chip that need to use is more senior, cost is higher;
(2) increase separately chip controls electric current output size and control breath light work, the shortcoming of the method is to need to increase than multicomponent device, the control circuit complex structure, and cost is higher, is not suitable for promoting.
Summary of the invention
The present invention is intended to solve at least one of technical problem that exists in the prior art.For this reason, first purpose of the present invention is to propose a kind of simple in structure and lower-cost breath light control circuit.Second purpose of the present invention is to propose a kind of refrigerator, and the refrigerator of the embodiment of the invention is applied to the display module of refrigerator with breath light, and fashion attractive in appearance is with low cost, is easy to promote.
For achieving the above object, a first aspect of the present invention embodiment provides a kind of breath light control circuit, comprising: the first switching tube, and described the first switching tube is controlled by input pulse; Second switch pipe, described second switch pipe are by described the first switch controlled, and described second switch pipe is powered to breath light by the first input voltage when closure; And controller, described controller is used to described the first switching tube that described input pulse is provided.
In one embodiment of the invention, the base stage of described the first switching tube links to each other with described controller by the first resistance, and the collector electrode of described the first switching tube is by second linking to each other and grounded emitter with power supply with the 3rd resistance of connecting; The emitter of described second switch pipe links to each other with described power supply and base stage links to each other with node between the described second and the 3rd resistance, and the collector electrode of described second switch pipe links to each other with described breath light so that described power supply provides described the first input voltage by described second switch pipe to described breath light.
In one embodiment of the invention, described breath light control circuit also comprises: the filter capacitor in parallel with described breath light.
In one embodiment of the invention, described controller can be the input pulse that described the first switching tube provides multi-frequency.
In one embodiment of the invention, when described input pulse is high level, described the first and second switching tube conductings, described power supply is powered to described breath light.
Simple in structure according to the breath light control circuit of the embodiment of the invention, less demanding to chip, also can realize by the software control mode, thereby reduce cost largely.
For achieving the above object, a second aspect of the present invention embodiment provides a kind of refrigerator, comprising: casing; Be installed in the door body on the described casing; The described breath light control circuit of above-described embodiment; The breath light that links to each other with described breath light control circuit; And the display screen of door on the body that is installed in refrigerator, described breath light shows by described display screen.
According to the refrigerator of the embodiment of the invention, by breath light control circuit being applied on the display floater of computer refrigerator, circuit carries on the display screen of refrigerator door, and fashion attractive in appearance is with low cost, and strong adaptability is easy to promote.
Additional aspect of the present invention and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage are from obviously and easily understanding becoming the description of embodiment in conjunction with following accompanying drawing, wherein:
Fig. 1 is the circuit theory diagrams of the breath light control circuit of one embodiment of the invention;
Fig. 2 is the breath light control circuit input oscillogram of one embodiment of the invention;
Fig. 3 is the breath light control circuit output waveform figure of one embodiment of the invention; With
Fig. 4 is the schematic diagram of the refrigerator of another embodiment of the present invention.
Embodiment
The below describes embodiments of the invention in detail, and the example of described embodiment is shown in the drawings, and wherein identical or similar label represents identical or similar element or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment that is described with reference to the drawings, only be used for explaining the present invention, and can not be interpreted as limitation of the present invention.
In description of the invention, it will be appreciated that, term " vertically ", " laterally ", " on ", orientation or the position relationship of the indications such as D score, 'fornt', 'back', " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward " be based on orientation shown in the drawings or position relationship, only be for convenience of description the present invention and simplified characterization, rather than indication or the hint device of indication or element must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as limitation of the present invention.
In addition, term " first ", " second " only are used for describing purpose, and can not be interpreted as indication or hint relative importance.
In description of the invention, unless otherwise prescribed and limit, need to prove that term " installation ", " linking to each other ", " connection " should be done broad understanding, for example, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be directly to link to each other, and also can indirectly link to each other by intermediary, for the ordinary skill in the art, can understand as the case may be the concrete meaning of above-mentioned term.
Below with reference to the breath light control circuit of Fig. 1 to Fig. 3 description according to first aspect present invention embodiment.
As shown in Figure 1, the breath light control circuit that provides of first aspect present invention embodiment comprises: the first switching tube Q1, second switch pipe Q2 and controller 200.
Wherein, the first switching tube Q1 is controlled by input pulse.Second switch pipe Q2 is controlled by the first switching tube Q1, and second switch pipe Q2 is powered to breath light D1 by the first input voltage when closure.Controller 200 is used to the first switching tube Q1 that described input pulse is provided.
Particularly, the base stage of the first switching tube Q1 links to each other with controller 200 by the first resistance R 1, and the collector electrode of the first switching tube Q1 links to each other and grounded emitter with power supply 100 with the 3rd resistance R 3 by the second resistance R 2 of series connection.The emitter of second switch pipe Q2 links to each other with power supply 100 and base stage links to each other with node between the second resistance R 2 and the 3rd resistance R 3, the collector electrode of second switch pipe Q2 links to each other with breath light D1 so that power supply 100 provides the first input voltage by second switch pipe Q2 to breath light D1, in one embodiment of the invention, power supply 100 is+the 12V power supply.
In an example of the present invention, the resistance of the first resistance R 1 can be 2.2K ohm, and the resistance of the second resistance R 2 can be 2.2K ohm, and the resistance of the 3rd resistance R 3 can be 1K ohm.The first switching tube Q1 is NPN type triode, and second switch pipe Q2 is the positive-negative-positive triode.
In one embodiment of the invention, controller 200 can be the input pulse that the first switching tube Q1 provides multi-frequency.When input pulse is high level, the first switching tube Q1 and second switch pipe Q2 conducting, power supply 100 is powered to breath light D1.
Controller 200 as: MCU (Micro Control Unit, micro-control unit), chip pin function is set to GPIO(General Purpose Input/Output, universal input/output), pin that can control chip provides periodically variable pwm signal by the first resistance R 1 to the first switching tube Q1, and adjust gradually the duty ratio of pwm control signal with default step-length take Preset Time as the cycle, namely obtain the square-wave signal of variable duty ratio, thereby control the turn-on and turn-off of the first switching tube Q1 and second switch pipe Q2, drive the light on and off of breath light E1.
As shown in Figure 1, in the breath light control circuit of the embodiment of the invention, further comprise the filter capacitor E1 in parallel with breath light D1.Wherein, the appearance value of filter resistance E1 can be 470 μ F.Filter capacitor E1 can make the big or small smooth change of output voltage.
In an example of the present invention, breath light D1 is LED.LED is the light source that a kind of monochromaticjty is good, the power energy consumption is little, thermal effect is few, cheap and easy to get, extensive use in electronic applications.Adopt LED as breath light, energy consumption and production cost that can breath light be lower.
In an example of the present invention, power supply 100 can provide direct current supply voltage, and magnitude of voltage can be 12V.Wherein, power supply 100 can be converted to through AC-DC (AC-DC) converting unit by the 220V AC power.
In an example of the present invention, the square-wave signal frequency of controller 200 outputs is 160Hz.Need to prove that this signal frequency value only is for exemplary purposes, the signal frequency value is not limited thereto.Because people's visual persistence effect, when light source flashes frequency and is higher than 100Hz, be not aware of scintillation, so the square-wave signal frequency of controller 200 outputs also can be for being higher than other values of 100Hz.But the equipment price of high frequency is more expensive, so preferred square-wave signal frequency values is 160Hz.
In an example of the present invention, Preset Time can be 100ms, and default step-length can be 2%.Be that controller 200 is take 100ms as the cycle, adjust gradually the duty ratio of the square-wave signal of output take 2% as amplitude.Need to prove that the breath light control circuit that the present invention proposes is not limited thereto the situation of numerical value.The value of Preset Time is larger, means that then the variation of duty ratio of output signal is slower, and the brightness of breath light D1 changes slower.The value of default step-length is larger, means that then the variation of duty ratio of output signal is faster, and the brightness of breath light D1 changes faster.Therefore, according to the intensity of breath light flicker with change the different of requirement, Preset Time and default step-length can arrange separately.
In an example of the present invention, controller 200 also is used for after the duty ratio of square-wave signal equals first threshold, heighten duty ratio with default step-length, and after the duty ratio of square-wave signal equals Second Threshold, turn down duty ratio with default step-length, thereby the duty ratio of the square-wave signal of controller 200 outputs fluctuates between first threshold and Second Threshold, and the brightness of breath light is also fluctuateed between darker and brighter two states.Preferably, first threshold is 0, and Second Threshold is 80%.Need to prove that the breath light control circuit that the present invention proposes is not limited thereto the situation of numerical value, can adjust according to practical situations.
Specifically describe the working method of the breath light control circuit of first aspect present invention embodiment below in conjunction with Fig. 1.
In the present invention, controlled the opening and closing of breath light D1 by controller 200 output square-wave signals.When controller 200 output high level signal, the first switching tube Q1 and successively conducting of second switch pipe Q2, the current collection of second switch pipe Q2 is high level very, and breath light D1 is luminous; When controller 200 output low level signal, the first switching tube Q1 and second switch pipe Q2 turn-off successively, and the current collection of second switch pipe Q2 is low level very, and breath light D1 extinguishes.Because the square-wave signal of controller 200 outputs has certain duty ratio and this duty cycle variation, so the average output current value in the circuit has certain value and this value cyclic variation, so breath light D1 also has certain brightness and cyclic variation.
Wherein, the square-wave signal frequency of controller 200 outputs is 160Hz, and namely output signal is take 6.25ms as one-period.From 2% to 80% variation of the duty ratio of controller 200 output signals is 16 cycles every 100ms() change in duty cycle 2%.Particularly, the moment during initial power-up is designated as 0 constantly.Then, controller 200 begin to control I/O periodically output duty cycle be 2% signal.Particularly, be in the one-period of 6.25ms at duration, can export 1*125 μ s high level and 49*125 μ s low level signal, to realize that duty ratio is as 2%.Through after the 100ms, namely export 16 all after dates, controller 200 control I/O periodically output duty cycle are 4% signal.Particularly, be in the one-period of 6.25ms at duration, can export 2*125 μ s high level and 48*125 μ s low level signal, to realize that duty ratio is as 4%.The like, the duty ratio of output signal increases gradually, and breath light brightness increases progressively.Until after the 3900ms, I/O periodically output duty cycle is 80% signal, and it is maximum that breath light brightness reaches.After 100ms, namely export 16 all after dates, begin to reduce the breath light descending luminance according to same method by I/O control duty ratio.During 7800ms, the duty ratio of output signal is 2%, and is identical with 0 constantly duty ratio, can regard as this moment to begin system from 7800ms and enter new round circulation, and the duty ratio of output signal rises to 80% by 2% and falls back 2% again, breath light brightness from the darkest to the brightest again to the darkest.
As shown in Figure 1, breath light control circuit also further comprises, the filter capacitor E1 in parallel with breath light D1.Wherein, the appearance value of filter resistance E1 can be 470 μ F.Filter capacitor E1 can make the big or small smooth change of output voltage.
Fig. 2 is the breath light control circuit input oscillogram of the embodiment of the invention, and this oscillogram is to be detected by the A point (see figure 1) between the first resistance R 1 and the first switching tube Q1 to obtain.
Fig. 3 is the breath light control circuit output waveform figure of the embodiment of the invention, and this oscillogram is to be detected by the B point (see figure 1) between second switch pipe Q2 and the breath light D1 to obtain.
Contrast as can be known in conjunction with Fig. 2 and Fig. 3, under the effect of filter capacitor C, the input waveform that originally is interrupted is converted to stable continuous wave output waveform, thereby realizes level and smooth effect of breathing.
Simple in structure according to the breath light control circuit of the embodiment of the invention, realize control to the brightness of breath light D1 by the variable volume square-wave signal of controller 200 output duty cycles, the common IO of general MCU can control, less demanding to chip, strong adaptability, also can realize by the software control mode, thereby reduce cost largely, be easy to promote.
Below in conjunction with the refrigerator of accompanying drawing description according to second aspect present invention embodiment.
As shown in Figure 4, the refrigerator of the embodiment of the invention comprises: casing, (not shown), door body (not shown), breath light control circuit 110, breath light 120 and display screen 130.
Wherein, the door body is installed on the casing.
Breath light control circuit 110 as shown in Figure 1, comprising: the first switching tube Q1, second switch pipe Q2 and controller 200.Wherein, the first switching tube Q1 is controlled by input pulse.Second switch pipe Q2 is controlled by the first switching tube Q1, and second switch pipe Q2 is powered to breath light D1 by the first input voltage when closure.Controller 200 is used to the first switching tube Q1 that described input pulse is provided.
Breath light 120 links to each other with breath light control circuit 110, and particularly, breath light 120 is in parallel with the filter capacitor E1 of breath light control circuit 110, namely in the position at the D1 place of above-mentioned example.
Particularly, the 200 output square-wave signals of the controller in the breath light control circuit 110 are controlled the opening and closing of breath light D1.When controller 200 output high level signal, the first switching tube Q1 and successively conducting of second switch pipe Q2, the current collection of second switch pipe Q2 is high level very, and breath light 120 is luminous; When controller 200 output low level signal, the first switching tube Q1 and second switch pipe Q2 turn-off successively, and the current collection of second switch pipe Q2 is low level very, and breath light 120 extinguishes.Because the square-wave signal of controller 200 outputs has certain duty ratio and this duty cycle variation, so the average output current value in the circuit has certain value and this value cyclic variation, so breath light 120 also has certain brightness and cyclic variation.
In an example of the present invention, breath light 120 is LED.LED is the light source that a kind of monochromaticjty is good, the power energy consumption is little, thermal effect is few, cheap and easy to get, extensive use in electronic applications.Adopt LED as breath light, energy consumption and production cost that can breath light be lower.
Display screen 130 is installed on the door body of refrigerator, and breath light 120 shows by display screen 130.Particularly, when refrigerator moved, breath light 120 presented such as the bright dark variation as people's the breathing for the user by display screen 130.
According to the refrigerator of the embodiment of the invention, by breath light control circuit being applied on the display floater of computer refrigerator, circuit carries on the display screen of refrigerator door, and fashion attractive in appearance is with low cost, and strong adaptability is easy to promote.
In the description of this specification, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or the example in conjunction with specific features, structure, material or the characteristics of this embodiment or example description.In this manual, the schematic statement of above-mentioned term not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or characteristics can be with suitable mode combinations in any one or more embodiment or example.
Although and illustrate and described embodiments of the invention, those having ordinary skill in the art will appreciate that: can carry out multiple variation, modification, replacement and modification to these embodiment in the situation that does not break away from principle of the present invention and aim, scope of the present invention is limited by claim and equivalent thereof.

Claims (6)

1. a breath light control circuit is characterized in that, comprising:
The first switching tube, described the first switching tube is controlled by input pulse;
Second switch pipe, described second switch pipe are by described the first switch controlled, and described second switch pipe is powered to breath light by the first input voltage when closure; And
Controller, described controller are used to described the first switching tube that described input pulse is provided.
2. breath light control circuit according to claim 1 is characterized in that,
The base stage of described the first switching tube links to each other with described controller by the first resistance, and the collector electrode of described the first switching tube is by second linking to each other and grounded emitter with power supply with the 3rd resistance of connecting;
The emitter of described second switch pipe links to each other with described power supply and base stage links to each other with node between the described second and the 3rd resistance, and the collector electrode of described second switch pipe links to each other with described breath light so that described power supply provides described the first input voltage by described second switch pipe to described breath light.
3. breath light control circuit according to claim 1 is characterized in that, also comprises:
The filter capacitor in parallel with described breath light.
4. breath light control circuit according to claim 1 is characterized in that, described controller can be the input pulse that described the first switching tube provides multi-frequency.
5. breath light control circuit according to claim 1 is characterized in that, when described input pulse is high level, and described the first and second switching tube conductings, described power supply is powered to described breath light.
6. a refrigerator is characterized in that, comprising:
Casing;
Be installed in the door body on the described casing;
Such as each described breath light control circuit of claim 1-5;
The breath light that links to each other with described breath light control circuit; And
Be installed in the display screen of door on the body of refrigerator, described breath light shows by described display screen.
CN2012105125358A 2012-12-04 2012-12-04 Respiration lamp control circuit and refrigerator with same Pending CN102946679A (en)

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Application Number Priority Date Filing Date Title
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105208754A (en) * 2015-10-30 2015-12-30 合肥晶弘三菱电机家电技术开发有限公司 Control method and drive circuit of LED illuminating lamp for refrigerators
CN105578654A (en) * 2016-01-20 2016-05-11 四川长虹电器股份有限公司 Indicator lamp control device capable of reducing stand-by power consumption of liquid crystal display television
CN108646806A (en) * 2018-04-27 2018-10-12 北京海林节能科技股份有限公司 A kind of temperature controller and its control method
CN111181642A (en) * 2020-02-17 2020-05-19 海信(山东)冰箱有限公司 Refrigerator and optical signal transmission system thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102378454A (en) * 2011-12-05 2012-03-14 合肥美的荣事达电冰箱有限公司 Breath light control circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102378454A (en) * 2011-12-05 2012-03-14 合肥美的荣事达电冰箱有限公司 Breath light control circuit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105208754A (en) * 2015-10-30 2015-12-30 合肥晶弘三菱电机家电技术开发有限公司 Control method and drive circuit of LED illuminating lamp for refrigerators
CN105578654A (en) * 2016-01-20 2016-05-11 四川长虹电器股份有限公司 Indicator lamp control device capable of reducing stand-by power consumption of liquid crystal display television
CN108646806A (en) * 2018-04-27 2018-10-12 北京海林节能科技股份有限公司 A kind of temperature controller and its control method
CN111181642A (en) * 2020-02-17 2020-05-19 海信(山东)冰箱有限公司 Refrigerator and optical signal transmission system thereof

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Free format text: CORRECT: APPLICANT; FROM: HEFEI MEDIA RONGSHIDA REFRIGERATOR CO., LTD. TO: HEFEI MIDEA REFRIGERATORCO., LTD.

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Address after: 230601 Hefei Changjiang Road, Anhui, No. 669

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Application publication date: 20130227