CN201574909U - Multi-fan malfunction detecting device and system thereof - Google Patents
Multi-fan malfunction detecting device and system thereof Download PDFInfo
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- CN201574909U CN201574909U CN2009202668407U CN200920266840U CN201574909U CN 201574909 U CN201574909 U CN 201574909U CN 2009202668407 U CN2009202668407 U CN 2009202668407U CN 200920266840 U CN200920266840 U CN 200920266840U CN 201574909 U CN201574909 U CN 201574909U
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Abstract
The utility model provides a multi-fan malfunction detecting device and a system thereof. The device comprises a first detecting circuit, a first analog-to-digital converting circuit, a first comparing circuit and a judging circuit, wherein the first detecting circuit comprises a first input terminal and a first output terminal which are connected with the first-phase circuits of a plurality of fans and is used for outputting a first small current by the first output terminal after converting the sum of the first-phase working currents into the first small current; the first analog-to-digital converting circuit is used for converting the first small current output by the first output terminal into a first digital signal; the first comparing circuit is used for comparing the first digital circuit with a first prearranged current and outputting a comparing result; the first prearranged current is a small current corresponding to the sum of the theoretical working currents of the first-phase circuits of the plurality of fans; and the judging circuit is used for judging the working states of the plurality of fans according to the comparing result. In the utility model, the multi-fan malfunction detecting device and the system thereof solve the problem that the plurality of fans can not be detected due to deficiency of AD passages on the controller in the prior art, and can realize the purpose of detecting the working states of the plurality of fans.
Description
Technical field
The utility model embodiment relates to the fan trouble detection device, relates in particular to a kind of multi fan Fail detecting apparatus and system.
Background technique
May have in the power electronic equipment multiplely be used to freeze, the fan part of heating, water cycle, oil circulation etc., it plays an important role in power electronic equipment, wherein, blower fan can be to be the three-phase blower fan of power source with the three phase mains, also can be the single-phase blower fan with the single phase poaer supply power supply.
At present, the controller of power electronic equipment the or working state of blower fan is not detected is perhaps by analog-to-digital conversion (Analog to Digital independently; Abbreviate as: the AD) operating current of each blower fan of channel sample, detect the working state of each blower fan according to the real work electric current, with the serious consequence of avoiding causing because of fan trouble.
In realizing process of the present utility model, the inventor finds that there is following deficiency in prior art, in case adopt first kind of mode blower fan to break down, controller can't detect fault, especially when the blower fan that breaks down be when being used for crucial heat radiation or thermal cycle, may cause power electronic equipment that wider damage takes place, bring graver results; And the restriction of the limited AD passage of the controlled device of the second way, when more blower fan, just can't detect the working state of all blower fans, a kind of solution is the AD passage that increases on the controller, guarantee that each blower fan all has an AD passage that it is sampled, to detect its working state, this method can detect the working state of a plurality of blower fans, but because AD adopts chip price more expensive, if be used for expanding the AD passage, both increased design cost, increase design time again, will increase the cost of testing circuit greatly.
The model utility content
The utility model embodiment provides a kind of multi fan Fail detecting apparatus and system, in order to solve in the prior art problem that can't detect a plurality of blower fans because of AD passage deficiency on the controller, realizes a plurality of blower fan work status detection.
The utility model embodiment provides a kind of multi fan Fail detecting apparatus, comprising:
First testing circuit, comprise first first input end and first output terminal that connect of circuit mutually with a plurality of blower fans, described first testing circuit is used to detect the first phase operating current of described a plurality of blower fans, and with the first phase operating current that detected and be converted to the first little electric current after, by described first output terminal output;
First analog to digital conversion circuit is connected with described first output terminal, and the first little current conversion that is used for described first output terminal output is first digital signal;
First comparison circuit, be connected with the output terminal of described first analog to digital conversion circuit, be used for described first digital signal and first electric current that prestores is compared, and the output comparative result, described first electric current that prestores is the theoretical work electric current sum of the first phase circuit of described a plurality of blower fans;
Decision circuitry is connected with the output terminal of described first comparison circuit, is used for judging according to the comparative result of described first comparison circuit working state of described a plurality of blower fans.
The utility model embodiment also provides a kind of multi fan fault detection system, comprises multi fan Fail detecting apparatus and a plurality of blower fan that the foregoing description provides; Described a plurality of blower fan is connected with described multi fan Fail detecting apparatus, described multi fan Fail detecting apparatus, be used to detect described a plurality of blower fans operating current and, and to detected operating current and compare processing, detect the working state of described a plurality of blower fans according to processing result.
The utility model embodiment's multi fan Fail detecting apparatus and system, operating current sum by a plurality of blower fans that testing circuit is detected, compare with the theoretical current sum of a plurality of blower fans that prestore, judge the working state of a plurality of blower fans by comparative result, the technical solution of the utility model, utilize the operating current sum of a plurality of blower fans, can detect the working state of a plurality of blower fans simultaneously by one road AD passage, overcome in the prior art defective that can't detect a plurality of blower fans, realized a plurality of blower fan work status detection because of AD passage deficiency on the controller.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technological 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 embodiments more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The structural representation of the multi fan Fail detecting apparatus that Fig. 1 provides for the utility model embodiment one;
The structural representation of the multi fan Fail detecting apparatus that Fig. 2 provides for the utility model embodiment two;
The structural representation of the multi fan Fail detecting apparatus that Fig. 3 provides for the utility model embodiment three.
Embodiment
For the purpose, technological scheme and the advantage that make the utility model embodiment clearer, below in conjunction with the accompanying drawing among the utility model embodiment, technological scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, rather than whole embodiments.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment who is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
Defective based on prior art, technical solutions of the utility model are used to realize the detection to the working state of a plurality of blower fans, technical solutions of the utility model do not limit the number of blower fan, but technology side for convenience of explanation of the present utility model, in each embodiment of the utility model, be example all with three blower fans, it will be understood by those skilled in the art that its principle was identical with following examples when this technological scheme detected the blower fan of other quantity.Wherein, blower fan can be single-phase blower fan, also can be heterogeneous blower fan; Divide from the type of power supply, blower fan can be an AC blower fan, also can dc fan.Single-phase blower fan has only a phase circuit, corresponding to the first phase circuit; The three-phase blower fan then has three-phase line, corresponds respectively to the first phase circuit, the second phase circuit and third phase circuit in following examples.
The structural representation of the multi fan Fail detecting apparatus that Fig. 1 provides for the utility model embodiment one, as shown in Figure 1, the multi fan Fail detecting apparatus that provides of present embodiment comprises: first testing circuit 11, first analog to digital conversion circuit 12, first comparison circuit 13 and decision circuitry 14.
Concrete, first testing circuit 11 comprises the first input end and first output terminal, first input end and a plurality of blower fans first mutually circuit connect, be a kind of in parallel relation between the first phase circuit of a plurality of blower fans.As shown in Figure 1, first of first phase circuit a2 of the first phase circuit a1 of blower fan 100, blower fan 200 and blower fan 300 mutually circuit a3 be parallel to the input end of first testing circuit 11.First testing circuit is used to detect the first phase operating current of a plurality of blower fans, and with the detected first phase operating current and be converted to the first little electric current, export by first output terminal.Because the blower fan power supply voltage is a high voltage, so detect the control circuit of the working state of blower fan for follow-up being used to, the operating current of blower fan is a kind of big electric current, detect for the ease of the control circuit of back working state blower fan, therefore, need be little electric current with big current conversion, wherein, control circuit in the present embodiment comprises first analog to digital conversion circuit 12, first comparison circuit 13 and decision circuitry 14, the size that wherein requires the first little electric current is within the input current scope that first analog to digital conversion circuit 12 requires, need to prove at this, little electric current among present embodiment and following each embodiment be with the operating current of blower fan comparatively speaking, and satisfy the requirement of this electric current place circuit to size of current, its occurrence is decided on place circuit and selected device.
First analog to digital conversion circuit 12, be connected with first output terminal of first testing circuit 11, first analog to digital conversion circuit 12 is used for the first little electric current of first output terminal output is carried out analog-to-digital conversion, make the first little current digitalization, generate first digital signal, and first digital signal is offered first comparison circuit 13.Wherein, first analog to digital conversion circuit 12 can be a road AD passage in the existing analog-digital converter.
Working principle below by describing the multi fan Fail detecting apparatus of present embodiment under the concrete condition illustrates the technical solution of the utility model:
The model of (1) three blower fan is all identical, and promptly the theoretical work electric current of each blower fan is identical, and corresponding operating current is also identical; If the running current of each blower fan is I, be approximately equal to the theoretical work electric current of each blower fan, first electric current that prestores is I1, and for example the little electric current with the I correspondence is 1A, and I1 is that 3A is an example, then:
When first testing circuit, 11 detected working current values are 3I, size through first digital signal after 12 conversions of first analog to digital conversion circuit is 3A, in first comparison circuit 13 first prestores the size of electric current for for 3A, the equal and opposite in direction of itself and first digital signal, decision circuitry 14 can judge that according to this result the working state of three blower fans is all normal;
When first testing circuit, 11 detected working current values are 2I, size through first digital signal after 12 conversions of first analog to digital conversion circuit is 2A, first comparison circuit 13 compares first digital signal and the first value I1 that prestores electric current, draw first digital signal than first comparative result that prestores the little 1A of electric current, decision circuitry 14 can judge have a blower fan to break down in three blower fans according to this result;
When first testing circuit, 11 detected working current values are I, size through first digital signal after 12 conversions of first analog to digital conversion circuit is 1A, first comparison circuit 13 compares first digital signal and the first value I1 that prestores electric current, draw first digital signal than first comparative result that prestores the little 2A of electric current, decision circuitry 14 can judge have two blower fans to break down in three blower fans according to this result;
When more a plurality of blower fan, and the like, can judge whether exist blower fan to break down in a plurality of blower fans, to break down, to be beneficial to the staff and power electronic equipment to be safeguarded according to testing result but also can judge several blower fans.
The model of (2) three blower fans is all different, and promptly the theoretical work electric current of each blower fan has nothing in common with each other, and corresponding operating current is also different;
The operating current of supposing blower fan 100 is I11, and the operating current of blower fan 200 is I22, and the operating current of blower fan 300 is I33; Present embodiment is 0.5A with the little electric current of I11 correspondence, and the little electric current of I22 correspondence is 1A, and the little electric current of I33 correspondence is 2A, and I1 is that 3.5A is an example, then:
When first testing circuit, 11 detected working current values are I11+I22+I33, size through first digital signal after 12 conversions of first analog to digital conversion circuit is 3.5A, first size that prestores electric current in first comparison circuit 13 is 3.5A, the equal and opposite in direction of itself and first digital signal, decision circuitry 14 can judge that according to this result the working state of three blower fans is all normal;
When first testing circuit, 11 detected working current values are I22+I33, size through first digital signal after 12 conversions of first analog to digital conversion circuit is 3A, first comparison circuit 13 compares first digital signal and the first value I1 that prestores electric current, draw first digital signal than first comparative result that prestores the little 0.5A of electric current, decision circuitry 14 can judge have a blower fan to break down in three blower fans according to this result, and can to judge the fault blower fan be blower fan 100; In like manner, when blower fan 200 or blower fan 300 broke down, this detection device can detect equally;
When first testing circuit, 11 detected working current values are I11, size through first digital signal after 12 conversions of first analog to digital conversion circuit is 0.5A, first comparison circuit 13 compares first digital signal and the first value I1 that prestores electric current, draw first digital signal than first comparative result that prestores the little 3A of electric current, decision circuitry 14 can judge have two blower fans to break down in three blower fans according to this result, and can to judge the fault blower fan be blower fan 200 and blower fan 300; In like manner, when any two blower fans break down, can be detected;
When more a plurality of blower fan, and the like, can judge whether exist blower fan to break down in a plurality of blower fans; In addition, when the electric current index difference of each blower fan is suitable, in some cases even can judge scope of failure, can improve the accuracy of detection, dwindle the scope that the staff safeguards power electronic equipment according to testing result, improve maintenance efficiency power electronic equipment.
From the above mentioned as can be known, the multi fan Fail detecting apparatus that present embodiment provides, can realize a plurality of blower fan work status detection, and owing to detect with the operating current sum of parallel way by a plurality of blower fans, only need a testing circuit and an AD passage, testing circuit and AD passage have been saved, the technological scheme that present embodiment provides, neither need to increase the AD sense channel, also need not abandon blower fan work status detection, overcome in the prior art because of the not enough defective that can't detect the working state of a plurality of blower fans of AD passage on the controller, realized a plurality of blower fan work status detection.
Concrete, if the blower fan in the foregoing description is an AC blower fan, then first testing circuit can be a mutual inductor, also can be sensor, and the first side of mutual inductor or sensor is the input end of first testing circuit, and second side is the output terminal of first testing circuit.If the blower fan in the foregoing description is a dc fan, then first testing circuit is a sensor, and the first side of sensor is the input end of first testing circuit, and second side is the output terminal of first testing circuit.Wherein mutual inductor or sensor are used for to be small voltage or little electric current, for example to adopt current transformer or the current sensor working current value and the first little electric current that is converted to second side with a plurality of blower fans of first side high voltage or big current conversion.
Further, blower fan can be that single-phase blower fan also can be the three-phase blower fan in the foregoing description, all is suitable for the technological scheme of present embodiment.
When blower fan is the three-phase blower fan,, can two circuits of three-phase blower fan be detected in order further to improve the degree of accuracy that detects.The structural representation of the multi fan Fail detecting apparatus that Fig. 2 provides for the utility model embodiment two, as shown in Figure 2, present embodiment is realized based on embodiment one, be that with embodiment one difference the multi fan Fail detecting apparatus of present embodiment also comprises: second testing circuit 21, second analog to digital conversion circuit 22, second comparison circuit 23.Wherein, blower fan 100, blower fan 200 and blower fan 300 also comprise second circuit b1, the second phase circuit b2 and the second circuit b3 mutually mutually respectively, and third phase circuit c1, third phase circuit c2 and third phase circuit c3.
Concrete, second testing circuit 21 comprises second input end and second output terminal, second testing circuit 21 is used to detect the second phase operating current of a plurality of blower fans, with the detected second phase operating current and be converted to the second little electric current, and export to second analog to digital conversion circuit 22 by second output terminal; Wherein, require the size of the second little electric current within the input current scope that second analog to digital conversion circuit 22 requires.As shown in Figure 2, the second phase circuit b3 of the second phase circuit b1 of blower fan 100, the second phase circuit b2 of blower fan 200 and blower fan 300 is connected respectively at second input end of second testing circuit 21, is relation in parallel between the second phase circuit b1, the second phase circuit b2 and the second phase circuit b3.
Second analog to digital conversion circuit 22, be connected with second output terminal of second testing circuit 21, the second little current conversion that is used for the output of second output terminal is second digital signal, concrete, second analog to digital conversion circuit 22 can adopt road AD passage in the existing analog-digital converter to realize, and second analog to digital conversion circuit 22 and first analog to digital conversion circuit 12 can be the two-way AD passages of same analog-digital converter;
Wherein, if the blower fan of present embodiment is an AC blower fan, then second testing circuit can be a mutual inductor, also can be sensor, and the first side of mutual inductor or sensor is the input end of second testing circuit, and second side is the output terminal of second testing circuit.If the blower fan in the present embodiment is a dc fan, then second testing circuit is a sensor, and the first side of sensor is the input end of second testing circuit, and second side is the output terminal of second testing circuit.
Concrete, the principle of the multi fan Fail detecting apparatus that present embodiment provides is identical with embodiment one, difference is, in the present embodiment two-phase circuit is detected, but the detection principle of each phase circuit is all identical, so do not repeat them here, please refer to the foregoing description about the detection principle of the second phase circuit.
The technological scheme of present embodiment by increasing the detection to a phase circuit, can make decision circuit further go to judge the working state of blower fan, avoids improving the detection accuracy to the multi fan working state because of detecting the erroneous judgement that a phase circuit occurs.
Further can also the three-phase line of three-phase blower fan all be detected, with the accuracy of further raising detection.The structural representation of the multi fan Fail detecting apparatus that Fig. 3 provides for the utility model embodiment three, as shown in Figure 3, present embodiment is realized based on embodiment two, difference is, the multi fan Fail detecting apparatus of present embodiment also comprises: three testing circuit 31, the 3rd analog to digital conversion circuit 32 and the 3rd comparison circuit 33.
Three testing circuit 31 comprises the 3rd input end and the 3rd output terminal, be used to detect the third phase operating current of a plurality of blower fans, with detected third phase operating current and be converted to the 3rd little electric current, and export to the 3rd analog to digital conversion circuit 32 by the 3rd output terminal; Wherein, require the size of the 3rd little electric current within the input current scope that the 3rd analog to digital conversion circuit 32 requires.As shown in Figure 3, the third phase circuit c3 of the third phase circuit c1 of blower fan 100, the third phase circuit c2 of blower fan 200 and blower fan 300 is connected with the 3rd input end of three testing circuit 31 respectively, is relation in parallel between third phase circuit c1, third phase circuit c2 and the third phase circuit c3.
The 3rd analog to digital conversion circuit 32, be connected with the 3rd output terminal of three testing circuit 31, the 3rd little current conversion that is used for the output of the 3rd output terminal is a three digital signal, concrete, the 3rd analog to digital conversion circuit 32 can adopt road AD passage in the existing analog-digital converter to realize, and the 3rd analog to digital conversion circuit 32 and first analog to digital conversion circuit 12, second analog to digital conversion circuit 22 can be three road AD passages of same analog-digital converter;
The 3rd comparison circuit 33, be connected with the output terminal of the 3rd analog to digital conversion circuit 32, be used for three digital signal and the 3rd electric current that prestores is compared, and comparative result exported to decision circuitry 14, further judge the working state of three blower fans according to the comparative result of the 3rd comparison circuit 33 for decision circuitry 14, wherein, the 3rd prestores electric current for corresponding to the third phase circuit c1 of blower fan 100, the third phase circuit c2 of blower fan 200, little electric current with the theoretical work electric current sum of the third phase circuit c3 of blower fan 300, the size of this little electric current should adapt with the 3rd little electric current, so that three digital signal and the 3rd electric current that prestores is compared.
Concrete, the principle of the multi fan Fail detecting apparatus that present embodiment provides is identical with embodiment one, difference is, in the present embodiment three-phase line is detected, but the detection principle of each phase circuit is all identical, so do not repeat them here, please refer to the foregoing description about detection principle to the second phase circuit and third phase circuit.
The technological scheme that present embodiment provides by the detection to three-phase line, has improved the accuracy to the multi fan faut detection.
Concrete, if the blower fan in the present embodiment is an AC blower fan, then three testing circuit can be a mutual inductor, also can be sensor, and the first side of mutual inductor or sensor is the input end of three testing circuit, and second side is the output terminal of three testing circuit.If the blower fan in the present embodiment is a dc fan, then three testing circuit is a sensor, the first side of sensor is the input end of three testing circuit, second side is the output terminal of three testing circuit, for example adopts current transformer or current sensor the operating current sum of a plurality of blower fans of first side to be converted to the 3rd little electric current of second side.
Further, technical solutions of the utility model also provide a kind of multi fan fault detection system, comprise multi fan Fail detecting apparatus and a plurality of blower fan that the foregoing description provides, wherein can be according to the corresponding multi fan Fail detecting apparatus of the type selecting of blower fan, to realize to a plurality of blower fan work status detection.
In power electronic equipment, also may there be a plurality of pump base parts, need the working state of a plurality of pump base parts be detected equally, the technical solution of the utility model is not only applicable to the working state of blower fan is detected, be equally applicable to the pump base part, for example oil pump, water pump etc. carry out the detection of working state.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be finished by the relevant hardware of programming instruction, aforesaid program can be stored in the computer read/write memory medium, this program is carried out the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
It should be noted that at last: above embodiment only in order to the explanation the technical solution of the utility model, is not intended to limit; Although the utility model is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technological scheme that aforementioned each embodiment put down in writing, and perhaps part technical characteristics 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 each embodiment's technological scheme of the utility model.
Claims (6)
1. a multi fan Fail detecting apparatus is characterized in that, comprising:
First testing circuit, comprise first first input end and first output terminal that connect of circuit mutually with a plurality of blower fans, described first testing circuit be used to detect described a plurality of blower fans the first phase operating current and, and with the first phase operating current that detected and be converted to the first little electric current after, by described first output terminal output;
First analog to digital conversion circuit is connected with described first output terminal, and the first little current conversion that is used for described first output terminal output is first digital signal;
First comparison circuit, be connected with the output terminal of described first analog to digital conversion circuit, be used for described first digital signal and first electric current that prestores is compared, and the output comparative result, described first prestore electric current for the first corresponding little electric current of theoretical work electric current sum of circuit mutually of described a plurality of blower fans;
Decision circuitry is connected with the output terminal of described first comparison circuit, is used for judging according to the comparative result of described first comparison circuit working state of described a plurality of blower fans.
2. multi fan Fail detecting apparatus according to claim 1 is characterized in that, also comprises:
Second testing circuit, comprise second second input end and second output terminal that connect of circuit mutually with described a plurality of blower fans, described second testing circuit is used to detect the second phase operating current of described a plurality of blower fans, and with the detected second phase operating current and be converted to the second little electric current after, by the output of described second output terminal;
Second analog to digital conversion circuit is connected with described second output terminal, and the second little current conversion that is used for described second output terminal output is second digital signal;
Second comparison circuit, be connected with the output terminal of described second analog to digital conversion circuit, be used for described second digital signal and second electric current that prestores is compared, and comparative result exported to described decision circuitry, further judge the working state of described a plurality of blower fans for described decision circuitry according to the comparative result of described second comparison circuit, described second prestore electric current for the second corresponding little electric current of theoretical work electric current sum of circuit mutually of described a plurality of blower fans.
3. multi fan Fail detecting apparatus according to claim 2 is characterized in that, also comprises:
Three testing circuit, comprise the 3rd input end and the 3rd output terminal that are connected with the third phase circuit of described a plurality of blower fans, described three testing circuit is used to detect the third phase operating current of described a plurality of blower fans, and with detected third phase operating current and be converted to the 3rd little electric current after, by the output of described the 3rd output terminal;
The 3rd analog to digital conversion circuit is connected with described the 3rd output terminal, and the 3rd little current conversion that is used for described the 3rd output terminal output is a three digital signal;
The 3rd comparison circuit, be connected with the output terminal of described the 3rd analog to digital conversion circuit, be used for described three digital signal and the 3rd electric current that prestores is compared, and comparative result exported to described decision circuitry, further judge the working state of described a plurality of blower fans for described decision circuitry according to the comparative result of described the 3rd comparison circuit, the described the 3rd prestore electric current for the corresponding little electric current of theoretical work electric current sum of the third phase circuit of described a plurality of blower fans.
4. multi fan Fail detecting apparatus according to claim 3 is characterized in that,
Described a plurality of blower fan is an AC blower fan;
Described first testing circuit is current transformer or current sensor;
Described second testing circuit is current transformer or current sensor;
Described three testing circuit is current transformer or current sensor.
5. multi fan Fail detecting apparatus according to claim 3 is characterized in that,
Described a plurality of blower fan is a dc fan;
Described first testing circuit is a current sensor;
Described second testing circuit is a current sensor;
Described three testing circuit is a current sensor.
6. a multi fan fault detection system is characterized in that, comprises each described multi fan Fail detecting apparatus and a plurality of blower fan as claim 1-5; Described a plurality of blower fan is connected with described multi fan Fail detecting apparatus, described multi fan Fail detecting apparatus, be used to detect described a plurality of blower fans operating current and, and to detected operating current and compare processing, detect the working state of described a plurality of blower fans according to processing result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202668407U CN201574909U (en) | 2009-11-09 | 2009-11-09 | Multi-fan malfunction detecting device and system thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202668407U CN201574909U (en) | 2009-11-09 | 2009-11-09 | Multi-fan malfunction detecting device and system thereof |
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| CN201574909U true CN201574909U (en) | 2010-09-08 |
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| CN2009202668407U Expired - Fee Related CN201574909U (en) | 2009-11-09 | 2009-11-09 | Multi-fan malfunction detecting device and system thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104373337A (en) * | 2014-11-14 | 2015-02-25 | 苏州迈创信息技术有限公司 | Roots blower testing system |
| CN107807292A (en) * | 2017-11-07 | 2018-03-16 | 中车大连电力牵引研发中心有限公司 | The failure detector circuit and DC fan system of DC fan |
| CN109209969A (en) * | 2018-09-28 | 2019-01-15 | 漳州科华技术有限责任公司 | DC fan fault detection means |
| CN114089025A (en) * | 2020-08-25 | 2022-02-25 | 广东博智林机器人有限公司 | Detection device and drive system |
-
2009
- 2009-11-09 CN CN2009202668407U patent/CN201574909U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104373337A (en) * | 2014-11-14 | 2015-02-25 | 苏州迈创信息技术有限公司 | Roots blower testing system |
| CN107807292A (en) * | 2017-11-07 | 2018-03-16 | 中车大连电力牵引研发中心有限公司 | The failure detector circuit and DC fan system of DC fan |
| CN109209969A (en) * | 2018-09-28 | 2019-01-15 | 漳州科华技术有限责任公司 | DC fan fault detection means |
| CN114089025A (en) * | 2020-08-25 | 2022-02-25 | 广东博智林机器人有限公司 | Detection device and drive system |
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