CN101770246A - Fan speed-regulating control circuit and speed-regulating fan equipment - Google Patents
Fan speed-regulating control circuit and speed-regulating fan equipment Download PDFInfo
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- CN101770246A CN101770246A CN201010002361A CN201010002361A CN101770246A CN 101770246 A CN101770246 A CN 101770246A CN 201010002361 A CN201010002361 A CN 201010002361A CN 201010002361 A CN201010002361 A CN 201010002361A CN 101770246 A CN101770246 A CN 101770246A
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Abstract
The invention provides a fan speed-regulating control circuit and speed-regulating fan equipment. The circuit comprises N detecting control units and a voltage control unit, wherein the detecting control units are used for controlling the self on-off according to the control signal; the voltage control unit is used for controlling the fan working voltage according to the on-off of each detecting control unit; and the voltage control unit comprises a resistor, a triode and N+1 voltage-regulator tubes. The N+1 voltage-regulator tubes are positively connected between the base electrode of the triode and the ground in series. The cathode of the first voltage-regulator tube is connected with the base electrode. Both ends of the resistor are respectively connected with the collector of the triode and the base electrode. The collector of the triode is connected with a voltage source and a transmitting electrode is used as an output end for connecting the fan. The output end of the Mth detecting control unit is connected with the cathode of the (M+1)th voltage-regulator tube. M is a positive integral which is smaller than or equal to N. The invention adopts multiple series voltage-regulator tubes to realize stepped control on the fan rotation speed, decreases the failure probability of the voltage stabilizing tube, avoids the failure of the whole circuit caused by the failure of one voltage-regulator tube and enhances the reliability of the circuit.
Description
Technical field
The present invention relates to the integrated circuit (IC) design technical field, relate in particular to a kind of fan speed-regulating control circuit and speed-regulating fan equipment.
Background technology
Along with the integrated level of equipment chips is more and more higher, the frequency of operation of chip and the power consumption of circuit etc. also increases thereupon, and the heat dissipation problem of equipment becomes a problem outstanding, that need solution badly.Solving the equipment cooling problem has several different methods, and wherein fan has obtained increasing application as a kind of effective heat radiation instrument.Though allow fan be in to run up down and can obtain best radiating effect always, but high wind speed also makes the noise power exponentially level in this very noisy source of fan increase, and on the energy, also caused very big waste, therefore fan runs up for a long time and can shorten greatly its serviceable life in addition, and the circuit application of adjusting rotation speed of the fan according to environment temperature is given birth to.
Fan speed-regulating control circuit is that a kind of rotation speed of the fan that makes changes along with the change of environment temperature, can improve fan serviceable life again to reach more reasonable performance fan heat dissipation, reduces the circuit of noise.When equipment work during at normal temperature, control circuit control fan work satisfies the heat radiation requirement of equipment at lower-speed state; And when equipment work during at higher temperature, control circuit is correspondingly controlled fan work and is satisfied its heat radiation requirement at fast state.
Fig. 1 is the structural representation of a kind of control circuit commonly used in the existing speed-regulating fan.As shown in Figure 1, Q1 is a NPN type triode, and its collector connects an input end IN1 of alignment circuit, and emitter connects the output of alignment circuit, and its watt level can be according to actual selection.D1～D4 is the stabilivolt that the voltage stabilizing value is successively decreased successively, and speed governing shelves number increases or reduces the quantity of stabilivolt according to actual needs, the wherein plus earth of D1, the anode of D2～D4 connects other input end IN2～IN4 of alignment circuit respectively, and negative electrode all is connected with power input IN1 by a resistance.This feature of utilizing stabilivolt voltage stabilizing value to successively decrease successively is a may command Q1 ground level voltage by the height of controlling IN2～IN4 incoming level, thus the voltage of control output " OUT ", and then the operating voltage of opertaing device fan.
Though the above-mentioned control circuit of prior art can be realized the multistep speed regulation control to fan, but there is certain drawback in it: because the main failure mode of stabilivolt is short circuit, and in above-mentioned control circuit, adopt the mode of many stabilivolt parallel connections to control the operating voltage rank of fan, if when wherein a stabilivolt lost efficacy because of short circuit, in case and this stabilivolt place in circuit, will cause the not conducting of output triode Q1 of whole fan speed regulating control, thereby entire circuit can lose efficacy thereupon, fan can not get electric quilt and move, and finally causes system overheat to damage.Further, because for stabilivolt device itself, just must guarantee that it flows through electric current in rated range if need guarantee that its voltage is stable, and in above-mentioned control circuit, adopt the mode of stabilivolt parallel connection, when needs were controlled the fan of high voltage, each stabilivolt all needed higher voltage stabilizing value, the power ratio that causes each stabilivolt to consume is bigger, has more aggravated the possibility of stabilivolt inefficacy and the reliability that has reduced circuit.
Summary of the invention
The embodiment of the invention provides a kind of fan speed-regulating control circuit and speed-regulating fan equipment, in order to the fan speed-regulating control circuit that overcomes prior art when using stabilivolt to realize step control to rotation speed of the fan, each stabilivolt is easily because need higher voltage stabilizing value, and make current rating lower, be easy to generate initial failure, and entire circuit causes global failure, the defective that reliability is lower easily because the short circuit of a stabilivolt was lost efficacy.
The embodiment of the invention provides a kind of fan speed-regulating control circuit, comprising:
N is used for the detection control module according to the break-make of the control signal control that receives self, and an on off operating mode that is used for according to N described detection control module, the voltage control unit that the operating voltage of fan is controlled; Wherein,
Described voltage control unit comprises first resistance, a first triode and N+1 stabilivolt, described N+1 stabilivolt forward is connected between the base stage and earth terminal of described first triode, and the base stage of described first triode connects the negative electrode of the 1st stabilivolt in the described N+1 stabilivolt, described earth terminal connects the anode of N+1 stabilivolt in the described N+1 stabilivolt, the two ends of described first resistance are connected with base stage with the collector of described first triode respectively, the collector of described first triode connects voltage source, and the emitter of described first triode connects described fan as the output terminal of described voltage control unit;
The output terminal of M detection control module in the individual described detection control module of N connects the negative electrode of described M+1 stabilivolt, to adjust the voltage of the output terminal of described voltage control unit by the break-make of controlling described M+1 stabilivolt; Wherein, N is a positive integer, and M is a positive integer smaller or equal to N.
The embodiment of the invention also provides a kind of speed-regulating fan equipment, comprising: above-mentioned fan speed-regulating control circuit, and the temperature sensing circuit and the fan that are connected with described fan speed-regulating control circuit respectively; Wherein,
Described temperature sensing circuit is used to detect the environment temperature of described equipment, and described environment temperature and default at least one threshold value compared, according to different comparative results, export different control signals and give described fan speed-regulating control circuit, so that described fan speed-regulating control circuit is controlled the operating voltage of described fan according to the described control signal that receives.
Fan speed-regulating control circuit that the embodiment of the invention provides and speed-regulating fan equipment, realize Multistage Control by the mode that adopts the series connection of many stabilivolts to fan work voltage, even make under the situation of a stabilivolt inefficacy short circuit, also only can cause the fan speed-regulating of certain one-level to lose efficacy, avoid because of the lost efficacy inefficacy of the entire circuit that causes of stabilivolt short circuit; Simultaneously, the series connection of stabilivolt also makes the voltage that offers fan to be shared jointly by each stabilivolt, the required voltage stabilizing value of corresponding single stabilivolt reduces, the mu balanced circuit consumed power is shared by the stabilivolt of many series connection, the probability that stabilivolt lost efficacy reduces greatly, and the reliability of circuit is improved.Further, the embodiment of the invention is also by adopting a series connection resistance to realize current limliting to the stabilivolt series loop, thereby the initial failure that can also avoid stabilivolt to cause because of electric current is excessive, has further improved the reliability of circuit.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do one to the accompanying drawing of required use in embodiment or the description of the Prior Art below introduces simply, apparently, accompanying drawing in describing below is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of a kind of control circuit commonly used in the existing speed-regulating fan;
Fig. 2 is the structural representation of fan speed-regulating control circuit embodiment one of the present invention;
Fig. 3 is the structural representation of fan speed-regulating control circuit embodiment two of the present invention;
Fig. 4 is the structural representation of fan speed-regulating control circuit embodiment three of the present invention;
Fig. 5 is the structural representation of speed-regulating fan equipment embodiment of the present invention.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer, below in conjunction with the accompanying drawing in the embodiment of the invention, technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
Fig. 2 is the structural representation of fan speed-regulating control circuit embodiment one of the present invention, as shown in Figure 2, the fan speed-regulating control circuit of present embodiment comprises that N is detected a control module 11 and a voltage control unit 12, N wherein is one more than or equal to 1 positive integer, and promptly the circuit of present embodiment has comprised that at least one detects control module and at least one detects the voltage control unit that control module is connected with this.Particularly, detect control module 11 and have the input end that is used to receive control signal, and this detection control module 11 is used for the voltage of this control signal of importing according to input end, control the break-make of self; And voltage control unit 12 is connected with the output terminal and the fan that detect control module 11 respectively, is used for the on off operating mode according to each detection control module 11, correspondingly controls the operating voltage of fan, to realize the step control to rotation speed of the fan.
Particularly, as shown in Figure 1, the voltage control unit 12 in the present embodiment comprise first resistance R 1, the first triode A1 and N+1 stabilivolt D1, D2 ..., DN+1.Wherein, N+1 stabilivolt forward is connected between the base stage and earth terminal of the first triode A1, and the negative electrode of the 1st stabilivolt D1 in this N+1 stabilivolt connects the base stage of the first triode A1, and the anode of N+1 stabilivolt DN+1 in this N+1 stabilivolt connects earth terminal; The two ends of first resistance R 1 are connected between the collector and base stage of the first triode A1; The collector of the first triode A1 also connects voltage source V CC, and the emitter of the first triode A1 then is connected with fan as the output terminal of this voltage control unit 12.
And for N detection control module, this N M detection control module that detects in the control module is corresponding with M+1 stabilivolt in N+1 the stabilivolt, and the output terminal of this M detection control module is connected to the negative electrode of M+1 stabilivolt, with break-make by control self, break-make to M+1 stabilivolt is controlled, thereby output terminal to voltage control unit, promptly the emitter terminal voltage of the first triode A1 is controlled, and finally reaches the purpose that the operating voltage of fan is adjusted.Wherein, the M of indication is a positive integer smaller or equal to N herein.
Particularly, for example, detect the control signal that control module 11 receives according to its input end when M, when being in conducting state, because the negative electrode of M+1 stabilivolt in this M output terminal that detects control module 11 and the voltage control unit 12 is connected, and this M detection control module 11 and M+1 stabilivolt is in and the state of company.Therefore this M conducting that detects control module 11 will cause M+1 stabilivolt by bypass, promptly cause ending of M+1 stabilivolt to be turn-offed, thereby make the emitter voltage V of the triode A1 that wins
E, promptly the operating voltage at fan two ends changes, and correspondingly, the rotating speed of fan also will similarly change.
And on the contrary, if M is detected the control signal that control module 11 receives according to its input end, be in when ending the state that turn-offs, M+1 stabilivolt of its correspondence is along with M shutoff that detects control module 11, to be switched on, thereby make the emitter voltage V of A1
E, promptly the operating voltage at fan two ends changes equally, and correspondingly, the rotating speed of fan changes too.
Thus, the conducting and the shutoff of the detection control module 11 by correspondence, feasible each stabilivolt that is connected between A1 and the earth terminal is in accordingly the state of conducting or shutoff, and then change the emitter voltage of the second triode A2, and the voltage that reaches control fan two ends correspondingly changes, so that the faster rotational speed of fan or the purpose that slows down.This is equivalent in embodiments of the present invention, and a stabilivolt of a detection control module and its correspondence constitutes the circuit unit of a control hierarchy of control circuit.Such circuit unit can have N in the present embodiment, and accordingly promptly, control circuit can be two-stage or multistage to the control of rotation speed of the fan.In addition, because in embodiments of the present invention, each stabilivolt exists in the mode of series connection, rotating speed to fan is controlled, and because the main failure mode of stabilivolt is short circuit, even a stabilivolt like this in the voltage control unit lost efficacy because of short circuit, other stabilivolts of series connection with it can not be short-circuited because of the short circuit of this stabilivolt yet, thereby for the The whole control circuit, only can make that also the control hierarchy corresponding with this stabilivolt lost efficacy in this control circuit, and can not influence the reliability of entire circuit.
Further, in the embodiment of the invention, each stabilivolt exists with the form of series connection, also will make the operating voltage that offers fan to share jointly by each stabilivolt, therefore for single stabilivolt, the voltage stabilizing value of bearing is also shared, and can be worth less stabilivolt by voltage stabilizing and bear.And according to the voltage stabilizing power consumption number of stabilivolt under the certain situation of electric current of voltage regulation, burning voltage is low more, the principle that the stabilivolt loss is low more, and the nominal loss of each stabilivolt reduces greatly, so the probability of each stabilivolt inefficacy will obviously reduce, and the reliability of circuit will be further enhanced.
Further, in the present embodiment, as shown in Figure 1, also be in series with first resistance R 1 in the series loop of a plurality of stabilivolts, the electric current of feasible each stabilivolt of flowing through of the existence of this resistance in series can also be controlled by the size of its resistance value, is equivalent to Current limited Control has been carried out in the series loop of stabilivolt, thereby make each stabilivolt can not take place because the electric current of flowing through is excessive, the load current value that surpasses self, and the initial failure situation that causes have improved the reliability of circuit equally.
The fan speed-regulating control circuit of present embodiment, realize step control by the mode that adopts the stabilivolt series connection to fan work voltage, even make under the situation of a stabilivolt short circuit, also only can cause the fan speed-regulating of certain one-level to lose efficacy, avoid because of the lost efficacy inefficacy of the entire circuit that causes of stabilivolt short circuit; Simultaneously, the series connection of stabilivolt also makes the voltage that offers fan to be shared jointly by each stabilivolt, and the required voltage stabilizing value of corresponding single stabilivolt reduces, and load current value increases, the probability that stabilivolt lost efficacy has obtained reduction, and the reliability of circuit is improved.Further, the embodiment of the invention is also by adopting a series connection resistance to realize current limliting to the stabilivolt series loop, thereby the initial failure that can also avoid stabilivolt to cause because of electric current is excessive, has further improved the reliability of circuit.
Fig. 3 is the structural representation of fan speed-regulating control circuit embodiment two of the present invention.As shown in Figure 3, the fan speed-regulating control circuit of present embodiment is specially the secondary speed-regulating control circuit to fan, promptly only realizes fan is carried out at a high speed or two other controls of level of low speed.Accordingly, in the circuit of present embodiment, include only one and detect control module, include only two stabilivolts in the voltage control unit, i.e. the first stabilivolt D1 and the second stabilivolt D2, the output terminal that detects control module is connected to the negative electrode place of the second stabilivolt D2.
Particularly, in the present embodiment, detecting control module can be by diode D3, second resistance R 2 and the second triode A2, and first capacitor C 1 is formed.Wherein, the anode of D3 is this input end that detects control module, is used to receive the control signal of temperature sensing circuit output; The negative electrode of D3 is connected with the base stage of A2 via R2, and the emitter of A2 connects earth terminal, and the collector of A2 is connected on the negative electrode of corresponding stabilivolt D2 as this output terminal that detects control module; C1 is connected between the emitter of the anode of D3 and A2, be used for to the control signal of input carry out burr absorption, make the milder and jamproof purpose of signal to reach.
Particularly, as shown in Figure 3, the first triode A1 in the present embodiment and the second triode A2 all can be a NPN triode.The temperature that detects equipment when the temperature-detecting device with the fan speed-regulating control circuit of present embodiment is lower than default temperature threshold (for example 60 degrees centigrade), need be with fan control in the following time of state of tick-over, the control signal of temperature sensing circuit output high level is given the control circuit of present embodiment.Diode D3 will be switched under the control of this high-level control signal, thereby make the second triode A2 also be switched on, stabilivolt D2 is ended by bypass thereby the conducting of A2 makes this moment, and diode A1 is under the forward local derviation of voltage source 12V, also be in the state of conducting, this moment A1 emitter terminal, promptly the operating voltage at fan two ends will be (V
Z1-V
BE).V wherein
Z1Be the voltage stabilizing value of stabilivolt D1, and V
BEFor the base stage of A1 and the voltage between the emitter, be generally 0.6V or 0.7V.So if in the present embodiment, the driven at low speed voltage of fan is 8V, set the voltage stabilizing value V of D1
Z1Be 8.6V, just can reach the purpose of the operating voltage of fan this moment for (8.6-0.6) V=8V.
Otherwise and the temperature that detects equipment when temperature-detecting device is higher than default temperature threshold (for example 60 degrees centigrade), promptly needs to control fan work in following time of state at a high speed, and then the control signal of output low level is given the control circuit of present embodiment.D3 will be cut off under the effect of this low level control signal, so A2 also is in the state that ends, this moment, stabilivolt D2 was switched on, and the voltage of the emitter of A1 will be (V accordingly
Z1+ V
Z2-V
BE), V wherein
Z2Voltage stabilizing value for stabilivolt D2.If in the present embodiment, the high-speed driving voltage that fan is set is 11.3V, sets the voltage stabilizing value V of D2
Z2Be 3.3V, just can realize the purpose of the operating voltage of fan this moment for (8.6+3.3-0.6) V=11.3V.
Thus, in the present embodiment, by simple circuit design, just can successfully realize two-stage speed regulating control to fan, stabilivolt exists in the mode of series connection, even one of them stabilivolt lost efficacy because of short circuit, also only can cause the rotating speed control fails of corresponding level, and can not cause the inefficacy of entire circuit.Simultaneously, when the running up of fan, high-speed driving voltage is born jointly by two stabilivolts, the required voltage stabilizing value of each stabilivolt reduces relatively, rated power reduces greatly, and stabilivolt causes the probability that short circuit was lost efficacy to be minimized because of overheated, has guaranteed the reliability of circuit more.
Need to prove in addition; though in the pairing Fig. 3 of present embodiment; show the situation that A1 and A2 are the NPN triode; but need be appreciated that; the protection domain of the embodiment of the invention is not limited to this; A1 and A2 can also be respectively replace with the NPN Darlington transistor of similar functions, promptly replace with two NPN triodes that are one another in series.Wherein the base stage of a NPN triode is as the base stage of whole NPN Darlington transistor, and the emitter of another NPN triode is as the emitter of NPN Darlington transistor, and the collector of two NPN triodes is jointly as the collector of whole NPN Darlington transistor.Using after the NPN Darlington transistor substituted the NPN triode, the control circuit of the embodiment of the invention is compared with the embodiment of above-mentioned NPN triode no matter on concrete principle of work or functional effect, does not all have any difference, does not repeat them here.
The fan speed-regulating control circuit of present embodiment, realize the two-stage of fan work voltage is controlled by the mode that adopts two stabilivolt series connection, even make under the situation of a stabilivolt short circuit, only can cause also wherein that the fan speed-regulating of one-level lost efficacy, avoid because of the lost efficacy inefficacy of the entire circuit that causes of single stabilivolt short circuit; Simultaneously, the series connection of stabilivolt also makes the voltage that offers fan to be shared jointly by each stabilivolt, and the required voltage stabilizing value of corresponding single stabilivolt reduces, and rated power reduces greatly, stabilivolt has obtained reduction because of the overheated probability that causes losing efficacy, and the reliability of circuit is improved.Further, the embodiment of the invention is also by adopting a series connection resistance to realize current limliting to the stabilivolt series loop, thereby the initial failure that can also avoid stabilivolt to cause because of electric current is excessive, has further improved the reliability of circuit.
Fig. 4 is the structural representation of fan speed-regulating control circuit embodiment three of the present invention.As shown in Figure 4, the fan speed-regulating control circuit of present embodiment is specially the three-step timing control circuit to fan, has promptly realized fan is carried out three other controls of level of high speed, middling speed or low speed.Compare with the two-stage speed-regulating control circuit of the foregoing description two, in the circuit of present embodiment, increased by one and detected control module and a stabilivolt.Be to comprise in the control circuit of present embodiment that two are detected control modules, comprise three stabilivolts in the voltage control unit, the i.e. first stabilivolt D1, the second stabilivolt D2 and the 3rd stabilivolt D2 ', first output terminal that detects control module is connected to the negative electrode of the second stabilivolt D2, and second output terminal that detects control module is connected to the negative electrode of the 3rd stabilivolt D2 '.
Particularly, in the present embodiment, two circuit structures that detect control module are consistent, and it is described by diode, resistance, triode to be the foregoing description two, and an electric capacity is formed.And particularly, the same with the foregoing description two, A1, A2 in the detection control module in the present embodiment and A2 ' all can be NPN triode or NPN Darlington transistor.And two detected the control signals that control module is imported separately, be temperature-detecting device according to the detection of facility environment temperature with judge output, be used for control signal that the rotation speed of the fan rank is controlled.Just because in the present embodiment, control hierarchy to rotation speed of the fan is three other controls of level, therefore in temperature-detecting device, answer correspondence to set two temperature thresholds, when the environment temperature that detects equipment is within the corresponding temperature range, then the corresponding control signal of output turns round with corresponding other rotating speed of level with the control fan.
Particularly, when the temperature that detects equipment when temperature-detecting device is lower than the first default temperature threshold, needs are controlled fan work under the state of low speed, are that high level, second control signal are the control circuit that high level or low level control signal are given present embodiment so temperature sensing circuit is exported first control signal.The first detection control module that is connected with first control signal is under the effect of high level, to be in the state of conducting, so the loop of stabilivolt D2 and D2 ' is by bypass and end, at this moment, the voltage of the emitter terminal of triode A1, promptly the operating voltage at fan two ends is (V
Z1-V
BE).Equally, if in the present embodiment, the driven at low speed voltage of fan is 8V, sets the voltage stabilizing value V of D1
Z1Be 8.6V, just can reach the purpose of the operating voltage of fan this moment for (8.6-0.6) V=8V.
And the temperature that detects equipment when temperature-detecting device is when being higher than the first default temperature threshold and being lower than the second default temperature threshold, needs are controlled fan work under the state of middling speed, are that low level, second control signal are the control circuit of the control signal of high level to present embodiment so temperature sensing circuit is exported first control signal.At this moment, the first detection control module that is connected with first control signal will be in the state that ends, and the second detection control module that is connected with second control signal will be in the state of conducting under the control action of high level under low level control action.So stabilivolt D2 ' detects under the control of control module second and ended by bypass, stabilivolt D2 is able to conducting, accordingly, this moment A1 emitter terminal, promptly the operating voltage at fan two ends will be (V
Z1+ V
Z2-V
BE).If in the present embodiment, the middling speed driving voltage that fan is set is 10V, sets the voltage stabilizing value V of D2
Z2Be 2V, just can realize the purpose of the operating voltage of fan this moment for (8.6+2-0.6) V=10V.
And the temperature that detects equipment when temperature-detecting device is when being higher than the second default temperature threshold, needs are controlled fan work under state at a high speed, are low level, second control signal are also given present embodiment for low level control signal control circuit so temperature sensing circuit is exported first control signal.At this moment, the first detection control module that is connected with first control signal will be in the state that ends, and the second detection control module that is connected with second control signal also will be in the state that ends under low level control action under low level control action.So stabilivolt D2 ' and D2 are able to conducting, accordingly, this moment A1 emitter terminal, promptly the operating voltage at fan two ends will be (V
Z1+ V
Z2+ V
Z2 '-V
BE), V wherein
Z2 'Voltage stabilizing value for stabilivolt D2 '.If in the present embodiment, the high-speed driving voltage that fan is set is 11.3V, sets the voltage stabilizing value V of D2 '
Z2Be 1.3V, just can realize the purpose of the operating voltage of fan this moment for (8.6+2+1.3-0.6) V=11.3V.
The fan speed-regulating control circuit of present embodiment, realize the three-step timing of fan work voltage is controlled by the mode that adopts three stabilivolt series connection, even make under the situation of a stabilivolt short circuit, only can cause also wherein that the fan speed-regulating of one-level lost efficacy, avoid because of the lost efficacy inefficacy of the entire circuit that causes of single stabilivolt short circuit; Simultaneously, the series connection of stabilivolt also makes the voltage that offers fan to be shared jointly by each stabilivolt, and the required voltage stabilizing value of corresponding single stabilivolt reduces, and rated power reduces greatly, stabilivolt has obtained reduction because of the overheated probability that causes losing efficacy, and the reliability of circuit is improved.Further, the embodiment of the invention is also by adopting a series connection resistance to realize current limliting to the stabilivolt series loop, thereby the initial failure that can also avoid stabilivolt to cause because of electric current is excessive, has further improved the reliability of circuit.
Need to prove, in the practical application, not only can be the two-stage in the foregoing description or three grades, can also be Multistage Control the control hierarchy of rotation speed of the fan.Accordingly, in temperature-detecting device, correspondence is provided with a plurality of temperature thresholds this moment, when the environment temperature that detects equipment when temperature-detecting device is within the corresponding temperature range, the control signal of then output correspondence, turn round with corresponding other rotating speed of level with the control fan, thereby reach the purpose of fully giving equipment cooling.Accordingly, this moment, the control signal of temperature-detecting device output also should be a plurality of, perhaps for having a plurality of bits, each signal or each bit are all corresponding with a detection control module in the present embodiment, to control the break-make of this detection control module, thereby control detects the break-make of the corresponding stabilivolt of control module with this, to realize the control to fan work voltage.
Fig. 5 is the structural representation of speed-regulating fan equipment embodiment of the present invention.As shown in Figure 5, the speed-regulating fan equipment of present embodiment comprises: fan speed-regulating control circuit 1 and the temperature sensing circuit 2 and the fan 3 that are connected with this fan speed-regulating control circuit 1 respectively.
Wherein, temperature sensing circuit 2 is used for the environment temperature of checkout equipment, and detected environment temperature and default at least one threshold value compared, according to different comparative results, export different control signals and give fan speed-regulating control circuit 1, so that fan speed-regulating control circuit 1 is controlled the operating voltage of fan 3 according to the control signal that receives.And the concrete structure and the course of work of the fan speed-regulating control circuit 1 in the relevant present embodiment can not repeat them here with reference to the related content of the related related embodiment exposure of said fans speed-regulating control circuit.
The speed-regulating fan equipment of present embodiment, realize step control by the mode that in fan speed-regulating control circuit, adopts the stabilivolt series connection to fan work voltage, even make under the situation of a stabilivolt short circuit, also only can cause the fan speed-regulating of certain one-level to lose efficacy, avoid because of the lost efficacy inefficacy of the entire circuit that causes of single stabilivolt short circuit; Simultaneously, the series connection of stabilivolt also makes the voltage that offers fan to be shared jointly by each stabilivolt, and the required voltage stabilizing value of corresponding single stabilivolt reduces, and rated power reduces greatly, stabilivolt has obtained reduction because of the overheated probability that causes losing efficacy, and the reliability of circuit is improved.Further, the embodiment of the invention is also by adopting a series connection resistance to realize current limliting to the stabilivolt series loop, thereby the initial failure that can also avoid stabilivolt to cause because of electric current is excessive, has further improved the reliability of circuit.
Further, in the present embodiment, all right one second electric capacity in parallel in the two ends of fan 3 is (not shown among Fig. 5, can be referring to Fig. 3 and shown in Figure 4), this second electric capacity is connected in parallel on the two ends of fan 3, can carry out Filtering Processing to the operating voltage of fan 3, thereby play the effect of the voltage noise of eliminating the fan generation, and make that the voltage at fan 3 two ends is more steady.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (6)
1. fan speed-regulating control circuit, it is characterized in that, comprise: N detection control module that is used for according to the break-make of the control signal control that receives self, and an on off operating mode that is used for according to N described detection control module, the voltage control unit that the operating voltage of fan is controlled; Wherein,
Described voltage control unit comprises first resistance, a first triode and N+1 stabilivolt, described N+1 stabilivolt forward is connected between the base stage and earth terminal of described first triode, and the base stage of described first triode connects the negative electrode of the 1st stabilivolt in the described N+1 stabilivolt, described earth terminal connects the anode of N+1 stabilivolt in the described N+1 stabilivolt, the two ends of described first resistance are connected with base stage with the collector of described first triode respectively, the collector of described first triode connects voltage source, and the emitter of described first triode connects described fan as the output terminal of described voltage control unit;
The output terminal of M detection control module in the individual described detection control module of N is connected to the negative electrode of described M+1 stabilivolt, to adjust the voltage of the output terminal of described voltage control unit by the break-make of controlling described M+1 stabilivolt; Wherein, N is a positive integer, and M is a positive integer smaller or equal to N.
2. fan speed-regulating control circuit according to claim 1 is characterized in that, each described detection control module includes diode, second resistance and second triode, wherein,
The anode of described diode is the input end of described detection control module, the negative electrode of described diode is connected with the base stage of described second triode via described second resistance, the emitter of described second triode connects described earth terminal, the collector of described second triode is connected on the negative electrode of corresponding described stabilivolt as the output terminal of described detection control module.
3. fan speed-regulating control circuit according to claim 2 is characterized in that, described detection control module also comprises first electric capacity, and described first electric capacity is connected between the emitter of the anode of described diode and described second triode.
4. according to the arbitrary described fan speed-regulating control circuit of claim 1～3, it is characterized in that described first triode and second triode are NPN type triode or NPN Darlington transistor.
5. a speed-regulating fan equipment is characterized in that, comprising: as the arbitrary described fan speed-regulating control circuit of claim 1～4, and the temperature sensing circuit and the fan that are connected with described fan speed-regulating control circuit respectively; Wherein,
Described temperature sensing circuit is used to detect the environment temperature of described equipment, and described environment temperature and default at least one threshold value compared, according to different comparative results, export different control signals and give described fan speed-regulating control circuit, so that described fan speed-regulating control circuit is controlled the operating voltage of described fan according to the described control signal that receives.
6. speed-regulating fan equipment according to claim 5 is characterized in that, described fan is also in parallel with one second electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010100023611A CN101770246B (en) | 2010-01-12 | 2010-01-12 | Fan speed-regulating control circuit and speed-regulating fan equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010100023611A CN101770246B (en) | 2010-01-12 | 2010-01-12 | Fan speed-regulating control circuit and speed-regulating fan equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101770246A true CN101770246A (en) | 2010-07-07 |
| CN101770246B CN101770246B (en) | 2012-02-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010100023611A Expired - Fee Related CN101770246B (en) | 2010-01-12 | 2010-01-12 | Fan speed-regulating control circuit and speed-regulating fan equipment |
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| CN (1) | CN101770246B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102734200A (en) * | 2012-07-13 | 2012-10-17 | 中国华录集团有限公司 | Temperature control and speed regulating system of direct current fan |
| CN103841708A (en) * | 2012-11-27 | 2014-06-04 | 深圳市海洋王照明工程有限公司 | Control circuit |
| CN103968890A (en) * | 2014-04-23 | 2014-08-06 | 苏州经贸职业技术学院 | Temperature, humidity and smoke monitoring system |
| CN106351865A (en) * | 2016-11-10 | 2017-01-25 | 东莞市富士多实业投资有限公司 | Direct current fan rotating speed precise control circuit based on single chip microcomputer |
| CN107066005A (en) * | 2017-04-18 | 2017-08-18 | 深圳市菲菱科思通信技术股份有限公司 | A kind of power switch and voltage regulating and controlling circuit |
| CN111237228A (en) * | 2018-11-28 | 2020-06-05 | 明纬(广州)电子有限公司 | Control circuit with speed regulation function |
| CN112181010A (en) * | 2020-09-23 | 2021-01-05 | 普联国际有限公司 | Temperature control method and device of router, storage medium and router |
| CN113931865A (en) * | 2021-10-20 | 2022-01-14 | 湖北芯擎科技有限公司 | Fan control circuit and temperature adjusting device |
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2010
- 2010-01-12 CN CN2010100023611A patent/CN101770246B/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102734200A (en) * | 2012-07-13 | 2012-10-17 | 中国华录集团有限公司 | Temperature control and speed regulating system of direct current fan |
| CN103841708A (en) * | 2012-11-27 | 2014-06-04 | 深圳市海洋王照明工程有限公司 | Control circuit |
| CN103841708B (en) * | 2012-11-27 | 2016-03-30 | 深圳市海洋王照明工程有限公司 | A kind of control circuit |
| CN103968890A (en) * | 2014-04-23 | 2014-08-06 | 苏州经贸职业技术学院 | Temperature, humidity and smoke monitoring system |
| CN106351865A (en) * | 2016-11-10 | 2017-01-25 | 东莞市富士多实业投资有限公司 | Direct current fan rotating speed precise control circuit based on single chip microcomputer |
| CN107066005A (en) * | 2017-04-18 | 2017-08-18 | 深圳市菲菱科思通信技术股份有限公司 | A kind of power switch and voltage regulating and controlling circuit |
| CN107066005B (en) * | 2017-04-18 | 2019-11-08 | 深圳市菲菱科思通信技术股份有限公司 | A kind of power switch and voltage regulating and controlling circuit |
| CN111237228A (en) * | 2018-11-28 | 2020-06-05 | 明纬(广州)电子有限公司 | Control circuit with speed regulation function |
| CN111237228B (en) * | 2018-11-28 | 2022-06-07 | 明纬(广州)电子有限公司 | Control circuit with speed regulation function |
| CN112181010A (en) * | 2020-09-23 | 2021-01-05 | 普联国际有限公司 | Temperature control method and device of router, storage medium and router |
| CN113931865A (en) * | 2021-10-20 | 2022-01-14 | 湖北芯擎科技有限公司 | Fan control circuit and temperature adjusting device |
| CN113931865B (en) * | 2021-10-20 | 2024-04-12 | 湖北芯擎科技有限公司 | Fan control circuit and temperature adjusting device |
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| Publication number | Publication date |
|---|---|
| CN101770246B (en) | 2012-02-29 |
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