CN104219822A - Heat dissipation circuit - Google Patents
Heat dissipation circuit Download PDFInfo
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- CN104219822A CN104219822A CN201310215136.XA CN201310215136A CN104219822A CN 104219822 A CN104219822 A CN 104219822A CN 201310215136 A CN201310215136 A CN 201310215136A CN 104219822 A CN104219822 A CN 104219822A
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- module
- refrigeration
- circuit
- filter capacitor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The embodiment of the invention discloses a heat dissipation circuit. The heat dissipation circuit comprises a rectification filter module, a comparison module, a switch module and a refrigeration module, wherein the rectification filter module is used for converting a received AC voltage into a DC working voltage of a post-stage circuit; the comparison module is connected with the rectification filter module and used for comparing the DC working voltage with an actual voltage corresponding to the temperature of an LED lamp and outputting a corresponding level signal according to a comparison result; the switch module is connected with the comparison module and used for receiving the level signal and outputting a corresponding switch signal; and the refrigeration module is connected with the switch module and used for being energized to start refrigeration or being not energized to stop refrigeration so that the temperature of the LED lamp keeps within a preset temperature threshold according to the switch signal. With the adoption of the heat dissipation circuit, the working state of the refrigeration module can be automatically controlled according to the temperature change of the LED lamp during working, a favorable heat dissipation and refrigeration effect is provided for the LED lamp, and the service life of the lamp is prolonged.
Description
Technical field
The present invention relates to electronic applications, particularly relate to a kind of radiating circuit.
Background technology
Along with the development of light fixture, its application is also more and more extensive, and especially Light-Emitting Diode (Light Emitting Diode is called for short LED) light fixture development is very rapid.It has power consumption low, pollute the advantages such as little, therefore more and more used.But LED lamp is when working long hours, temperature can be higher, at high temperature works if maintained always, can cause adverse effect to the useful life of LED lamp.In the prior art, the general aluminium base that adopts comes for LED lamp heat radiation, and aluminium base has thermal conductive resin, the heat conduction of LED lamp can be gone out.But for high-power LED light fixture, its caloric value is comparatively large, is only undertaken dispelling the heat cannot satisfy the demands by aluminium base.
Summary of the invention
Embodiment of the present invention technical problem to be solved is, provides a kind of radiating circuit.The operating state of the cold module of variations in temperature nonstick system of control when can work according to LED lamp, for LED lamp provides good heat radiation and refrigeration, improves the useful life of light fixture.
In order to solve the problems of the technologies described above, embodiments provide a kind of radiating circuit, comprising:
Rectification filtering module, for being converted to the direct-current working volts of late-class circuit by the alternating voltage of reception;
Comparison module, is connected with described rectification filtering module, for more described direct-current working volts and the virtual voltage corresponding with LED lamp temperature, exports corresponding level signal according to comparative result;
Switch module, is connected with described comparison module, for receiving described level signal, exports corresponding switching signal;
Refrigeration module, is connected with described switch module, for starting within refrigeration or power-off stop refrigeration making the temperature of described LED lamp remain on preset temperature threshold value according to the energising of described switching signal.
Wherein, described radiating circuit also comprises indicating module, and described indicating module is connected with the output of described comparison module, for receiving the level signal that described comparison module exports, indicates the operating state of described refrigeration module.
Wherein, described rectification filtering module comprises transformer, rectifier bridge, filter capacitor, the two ends of the primary coil of described transformer connect two inputs of alternating voltage respectively, the first input end of rectifier bridge described in secondary coil one termination, second input of rectifier bridge described in another termination, first of described rectifier bridge exports the positive pole of filter capacitor described in termination, the negative pole of filter capacitor described in the second output termination.
Wherein, described comparison module comprises the first divider resistance, thermistor and comparable chip, the positive pole of filter capacitor described in described first divider resistance one termination, one end of thermistor described in another termination, the negative pole of filter capacitor described in another termination of described thermistor, the power input pin of described comparable chip connects the positive pole of described filter capacitor, grounding pin connects the negative pole of described filter capacitor, trigger pin connects the common node of described first divider resistance and described thermistor, reset the common node that locking pin connects described first divider resistance and described thermistor, reset the positive pole that pin connects described filter capacitor, output pin connects described switch module.
Wherein, described first divider resistance is adjustable resistance.
Wherein, described switch module comprises relay, diode, the output pin of comparable chip described in coil one termination of described relay, the negative pole of filter capacitor described in another termination, the switch of described relay connects described refrigeration module, the positive pole of described diode connects coil one end of described relay, the coil other end of negative pole contact relay.
Wherein, described refrigeration module comprises cooling piece, the positive pole of filter capacitor described in a termination of described cooling piece, and the switch of relay described in another termination, the switch of described relay connects the negative pole of described filter capacitor again.
Wherein, described refrigeration module also comprises fan, and described fan is in parallel with described cooling piece.
Wherein, described indicating module comprises the second divider resistance and light-emitting diode, the common node of comparable chip output and described diode cathode described in described second divider resistance one termination, the positive pole of Light-Emitting Diode described in another termination, the negative pole of described Light-Emitting Diode connects the switch of described relay.
Wherein, the model of described comparable chip is NE555.
Implement the embodiment of the present invention, there is following beneficial effect:
Direct-current working volts and the virtual voltage corresponding with LED lamp temperature is compared by comparison module, thus generate level signal to switch module, control conducting and the closedown in loop, refrigeration module place, finally make when LED lamp temperature is higher, automatic startup refrigeration module refrigeration, when LED lamp temperature is lower, automatic stopping refrigeration module refrigeration, within finally guaranteeing the preset temperature threshold value that the temperature of LED lamp keeps, be beneficial to the stability keeping LED lamp work, extend its useful life, whole process of refrigerastion is without the need to manual operation, simple and reliable.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the connection diagram of the first embodiment of radiating circuit of the present invention;
Fig. 2 is the connection diagram of the second embodiment of radiating circuit of the present invention;
Fig. 3 is the circuit diagram of the 3rd embodiment of radiating circuit of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope that the present invention controls.
Please refer to Fig. 1, be the connection diagram of the first embodiment of radiating circuit of the present invention, in the present embodiment, described circuit comprises: rectification filtering module 1, comparison module 2, switch module 3, refrigeration module 4.
Described rectification filtering module 1 rectification filtering module, for being converted to the direct-current working volts of late-class circuit by the alternating voltage of reception;
Described comparison module 2 is connected with described rectification filtering module 1, for more described direct-current working volts and the virtual voltage corresponding with LED lamp temperature, exports corresponding level signal according to comparative result;
Described switch module 3 is connected with described comparison module 2, for receiving described level signal, exports corresponding switching signal;
Described refrigeration module 4 is connected with described switch module 3, for starting within refrigeration or power-off stop refrigeration making the temperature of described LED lamp remain on preset temperature threshold value according to the energising of described switching signal.
Direct-current working volts and the virtual voltage corresponding with LED lamp temperature is compared by comparison module, thus generate level signal to switch module, control conducting and the closedown in loop, refrigeration module place, finally make when LED lamp temperature is higher, automatic startup refrigeration module refrigeration, when LED lamp temperature is lower, automatic stopping refrigeration module refrigeration, within finally guaranteeing the preset temperature threshold value that the temperature of LED lamp keeps, be beneficial to the stability keeping LED lamp work, extend its useful life, whole process of refrigerastion is without the need to manual operation, simple and reliable.
Please refer to Fig. 2, is the connection diagram of the second embodiment of radiating circuit of the present invention; In the present embodiment, described circuit comprises: rectification filtering module 1, comparison module 2, switch module 3, refrigeration module 4, indicating module 5.
Described rectification filtering module 1 rectification filtering module, for being converted to the direct-current working volts of late-class circuit by the alternating voltage of reception;
Described comparison module 2 is connected with described rectification filtering module 1, for more described direct-current working volts and the virtual voltage corresponding with LED lamp temperature, exports corresponding level signal according to comparative result;
Described switch module 3 is connected with described comparison module 2, for receiving described level signal, exports corresponding switching signal;
Described refrigeration module 4 is connected with described switch module 3, for starting within refrigeration or power-off stop refrigeration making the temperature of described LED lamp remain on preset temperature threshold value according to the energising of described switching signal.
Described indicating module 5 is connected with the output of described comparison module 2, for receiving the level signal that described comparison module 2 exports, indicates the operating state of described refrigeration module 4.
Indicating module can be arranged on user and facilitate visible place, even if away from working region, user also can understand the operating state of heating module and the real time temperature situation of working region.Indicating module can with sound as buzzer, light such as the modes such as Light-Emitting Diode point out user.
Please refer to Fig. 3, be the circuit diagram of the 3rd embodiment of radiating circuit of the present invention, in the present embodiment, described circuit comprises: rectification filtering module, comparison module, switch module, heating module, indicating module.
Rectification filtering module, for being converted to the direct-current working volts of late-class circuit by the alternating voltage of reception;
Comparison module, is connected with described rectification filtering module, for more described direct-current working volts and the virtual voltage corresponding with LED lamp temperature, exports corresponding level signal according to comparative result;
Switch module, is connected with described comparison module, for receiving described level signal, exports corresponding switching signal;
Refrigeration module, is connected with described switch module, for starting within refrigeration or power-off stop refrigeration making the temperature of described LED lamp remain on preset temperature threshold value according to the energising of described switching signal.
Described indicating module is connected with the output of described comparison module, for receiving the level signal that described comparison module exports, indicates the operating state of described refrigeration module.
Particularly, described rectification filtering module comprises transformer T, rectifier bridge BD, filter capacitor C, the two ends of the primary coil of described transformer T connect two inputs of alternating voltage respectively, the first input end of rectifier bridge BD described in secondary coil one termination, second input of rectifier bridge BD described in another termination, first of described rectifier bridge BD exports the positive pole of filter capacitor C described in termination, the negative pole of filter capacitor C described in the second output termination.
Described comparison module comprises the first divider resistance R1, thermistor RT and comparable chip U, the positive pole of filter capacitor C described in described first divider resistance R1 mono-termination, one end of thermistor RT described in another termination, the negative pole of filter capacitor C described in described another termination of thermistor RT, power input pin i.e. the 8th pin of described comparable chip U connects the positive pole of described filter capacitor C, grounding pin i.e. the 1st pin connects the negative pole of described filter capacitor C, trigger pin i.e. the 2nd pin connects the common node of described first divider resistance R1 and described thermistor RT, reset the common node that locking pin i.e. the 6th pin meets described first divider resistance R1 and described thermistor RT, reset pin i.e. the 8th pin and connect the positive pole of described filter capacitor, output pin i.e. the 3rd pin connects described switch module.
Preferably, described first divider resistance R1 is adjustable resistance.
Described switch module comprises relay K, diode D, the output pin of comparable chip U described in coil one termination of described relay K, the negative pole of filter capacitor C described in another termination, the K switch-1 of described relay K connects described refrigeration module, the positive pole of described diode D connects coil one end of described relay K, the coil other end of negative pole contact relay K.
Described refrigeration module comprises cooling piece P, the positive pole of filter capacitor C described in a termination of described cooling piece P, the K switch-1 of relay K described in another termination, and the K switch-1 of described relay K connects the negative pole of described filter capacitor C again.
Preferably, described refrigeration module also comprises fan M, and described fan M is in parallel with described cooling piece P.Except cooling piece P, also add fan M, multiple refrigeration radiating mode is beneficial to raising radiating efficiency.
Described indicating module comprises the second divider resistance R2 and LED, the common node of comparable chip U output and described diode D negative pole described in described second divider resistance R2 mono-termination, the positive pole of Light-Emitting Diode LED described in another termination, the negative pole of described Light-Emitting Diode LED connects the K switch-1 of described relay K.
The model of described comparable chip is NE555.Its operation technique is ripe, and stable performance is cheap.
The lighting lamp group LED0 of LED lamp is driven by LED and connects alternating voltage.
Utilize the temperature characterisitic of thermistor, the first divider resistance R1 and thermistor RT forms temperature control voltage circuit, when selecting thermistor RT, need regulate the value of the first divider resistance R1, by cooperatively interacting, and adjustable preset temperature threshold value.Judge whether that output carrys out control relay K by a comparable chip again.When the temperature of LED lamp lower than preset temperature threshold value as 70 degrees Celsius time, thermistor RT resistance raises, RT both end voltage raises, cause the voltage of the 2nd pin of NE555 higher than 1/3 of the direct-current working volts from the 8th pin and the input of the 1st pin, 3rd pin of NE555 does not export, and relay K dead electricity quits work, and K switch-1 disconnects, cooling piece P and fan M quits work, and does not carry out freezing and dispelling the heat.The Light-Emitting Diode LED simultaneously indicated extinguishes, and indicating user now cooling piece P and fan M is in the state of quitting work; When the temperature of LED lamp reaches preset temperature threshold value as 70 degrees Celsius, thermistor RT resistance reduces, RT both end voltage reduce, cause the voltage of the 2nd pin of NE555 lower than from the 8th pin and the 1st pin input direct-current working volts 1/3, NE555 the 3rd pin export high level, relay K obtains electric work, K switch-1 adhesive, the work of cooling piece P and fan M conduction, cooling piece is aluminium base refrigeration, fan turns dispels the heat, thus reduces the temperature of LED lamp.High level is powered to Light-Emitting Diode LED by the second divider resistance R2 simultaneously, and now cooling piece P and fan M is in running order for prompting user.
It should be noted that, each embodiment in this specification all adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiment, between each embodiment identical similar part mutually see.For device embodiment, due to itself and embodiment of the method basic simlarity, so description is fairly simple, relevant part illustrates see the part of embodiment of the method.
By the description of above-described embodiment, the present invention has the following advantages:
Direct-current working volts and the virtual voltage corresponding with LED lamp temperature is compared by comparison module, thus generate level signal to switch module, control conducting and the closedown in loop, refrigeration module place, finally make when LED lamp temperature is higher, automatic startup refrigeration module refrigeration, when LED lamp temperature is lower, automatic stopping refrigeration module refrigeration, within finally guaranteeing the preset temperature threshold value that the temperature of LED lamp keeps, be beneficial to the stability keeping LED lamp work, extend its useful life, whole process of refrigerastion is without the need to manual operation, simple and reliable.
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-Only Memory is called for short ROM) or random store-memory body (Random Access Memory is called for short RAM) etc.
Above disclosedly be only present pre-ferred embodiments, certainly can not limit the interest field of the present invention with this, therefore according to the equivalent variations that the claims in the present invention are done, still belong to the scope that the present invention is contained.
Claims (10)
1. a radiating circuit, is characterized in that, comprising:
Rectification filtering module, for being converted to the direct-current working volts of late-class circuit by the alternating voltage of reception;
Comparison module, is connected with described rectification filtering module, for more described direct-current working volts and the virtual voltage corresponding with LED lamp temperature, exports corresponding level signal according to comparative result;
Switch module, is connected with described comparison module, for receiving described level signal, exports corresponding switching signal;
Refrigeration module, is connected with described switch module, for starting within refrigeration or power-off stop refrigeration making the temperature of described LED lamp remain on preset temperature threshold value according to the energising of described switching signal.
2. circuit as claimed in claim 1, it is characterized in that, described radiating circuit also comprises indicating module, and described indicating module is connected with the output of described comparison module, for receiving the level signal that described comparison module exports, indicate the operating state of described refrigeration module.
3. circuit as claimed in claim 2, it is characterized in that, described rectification filtering module comprises transformer, rectifier bridge, filter capacitor, the two ends of the primary coil of described transformer connect two inputs of alternating voltage respectively, the first input end of rectifier bridge described in secondary coil one termination, second input of rectifier bridge described in another termination, first of described rectifier bridge exports the positive pole of filter capacitor described in termination, the negative pole of filter capacitor described in the second output termination.
4. circuit as claimed in claim 3, it is characterized in that, described comparison module comprises the first divider resistance, thermistor and comparable chip, the positive pole of filter capacitor described in described first divider resistance one termination, one end of thermistor described in another termination, the negative pole of filter capacitor described in another termination of described thermistor, the power input pin of described comparable chip connects the positive pole of described filter capacitor, grounding pin connects the negative pole of described filter capacitor, trigger pin connects the common node of described first divider resistance and described thermistor, reset the common node that locking pin connects described first divider resistance and described thermistor, reset the positive pole that pin connects described filter capacitor, output pin connects described switch module.
5. circuit as claimed in claim 4, it is characterized in that, described first divider resistance is adjustable resistance.
6. circuit as claimed in claim 5, it is characterized in that, described switch module comprises relay, diode, the output pin of comparable chip described in coil one termination of described relay, the negative pole of filter capacitor described in another termination, the switch of described relay connects described refrigeration module, and the positive pole of described diode connects coil one end of described relay, the coil other end of negative pole contact relay.
7. circuit as claimed in claim 6, it is characterized in that, described refrigeration module comprises cooling piece, the positive pole of filter capacitor described in a termination of described cooling piece, the switch of relay described in another termination, the switch of described relay connects the negative pole of described filter capacitor again.
8. circuit as claimed in claim 7, it is characterized in that, described refrigeration module also comprises fan, and described fan is in parallel with described cooling piece.
9. circuit as claimed in claim 8, it is characterized in that, described indicating module comprises the second divider resistance and light-emitting diode, the common node of comparable chip output and described diode cathode described in described second divider resistance one termination, the positive pole of Light-Emitting Diode described in another termination, the negative pole of described Light-Emitting Diode connects the switch of described relay.
10. circuit as claimed in claim 9, it is characterized in that, the model of described comparable chip is NE555.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310215136.XA CN104219822A (en) | 2013-05-31 | 2013-05-31 | Heat dissipation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310215136.XA CN104219822A (en) | 2013-05-31 | 2013-05-31 | Heat dissipation circuit |
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| CN104219822A true CN104219822A (en) | 2014-12-17 |
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| CN201310215136.XA Pending CN104219822A (en) | 2013-05-31 | 2013-05-31 | Heat dissipation circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114879779A (en) * | 2022-05-31 | 2022-08-09 | 成都中远创视科技有限公司 | Temperature control circuit based on filter |
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