CN205941737U - Radiator fan's fault detection device and heat abstractor - Google Patents
Radiator fan's fault detection device and heat abstractor Download PDFInfo
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- CN205941737U CN205941737U CN201620858572.8U CN201620858572U CN205941737U CN 205941737 U CN205941737 U CN 205941737U CN 201620858572 U CN201620858572 U CN 201620858572U CN 205941737 U CN205941737 U CN 205941737U
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Abstract
An embodiment of the utility model provides a radiator fan's fault detection device and heat abstractor, radiator fan's fault detection device includes: detection and control circuit and setting fault detection branch road and the the normal power supply branch road between the positive pole of the anodal of radiator fan and radiator fan's power, fault detection branch road and the normal power supply branch road parallel connection, and all be provided with electric control switch, detect and control circuit respectively with fault detection branch road and the normal power supply branch road in electric control switch and fault detection on the road put and be connected, measuring and control circuit are arranged in the electric control switch who controls fault detection branch road and the normal power supply branch road not switch on simultaneously to through detecting the voltage signal that fault detection is ordered when electric control switch in control fault detection branch road switches on, confirm radiator fan's fault type. The utility model discloses a safe, carry out fault detection to radiator fan reliably, and simple structure, with low costs.
Description
Technical field
The utility model is related to fault detection technique field, more particularly, to a kind of failure detector of radiator fan and dissipate
Thermal.
Background technology
Existing power electronic equipment, due to itself having higher loss, often need to be carried out cold using radiator fan to equipment
But., in regulator cubicle, apply the such as frequency conversion of all kinds of electronic devices taking the regulator cubicle of wind power generating set (hereinafter referred to as unit) as a example
Device, solid-state relay, transformer, rectification module etc. are so that in-cabinet temperature more and more higher.Too high temperature can reduce electronic device
Service life, or even cause damage.Common method is to be radiated using radiator fan, so that in-cabinet temperature is just maintained at
In the range of constant value.
However, because a variety of causes can lead to radiator fan fault, common radiator fan fault has open circuit, short circuit, blocks up
Turn, owe lubrication etc..Radiator fan fault can make electric in-cabinet temperature raise, and then affects unit safety operation.Checked reviewing knowledge already acquired
The regular hour can be expended, the parameter that such as temperature sensor fault, master controller start fan is improper, master control during barrier reason
The many reasons such as device temperature collect module channel failure processed, all can lead to unit wrong report excess temperature fault, and fan running status is past
Toward will not arouse attention first, thus causing the prolongation of different degrees of downtime.Therefore, the fault detect of radiator fan exists
The aspects such as fan early warning, components and parts protection, saving time cost, reduction unit generation amount loss all have highly important meaning
Justice.
Fig. 1 is the structured flowchart of the failure detector of radiator fan of prior art, and fault detect as shown in Figure 1 fills
Put including radiator fan 101, relay 102, sampling resistor 103 and electronic circuit 104.Wherein, relay 102 controls and dissipates
The connection in the 24V loop of Hot-air fan 101.Its operation principle is as follows：After regulator cubicle temperature is detected higher than predetermined threshold value, connect
Relay 102, makes radiator fan 101 start working.By concatenating sampling resistor 103 in the current supply circuit of radiator fan 101,
Current value in the current supply circuit of radiator fan 101 is sampled, and is converted into the magnitude of voltage at sampling resistor 103 two ends, make
(specifically include voltage amplifier, waveform generator, voltage collection circuit, voltage comparator, filtering with electronic circuit 104
The electronic components such as device) sampled voltage is processed, and then the operation shape to radiator fan 101 according to the sampled voltage after processing
Condition is judged.However, said apparatus have following weak point：One is that electronic circuit 104 needs development board, and electricity
Sub- components and parts are more so that circuit structure is more complicated, and reliability is relatively low；Two is it is necessary to total head opens during detection radiator fan fault
Dynamic radiator fan, if radiator fan fault (as stall), can lead to that in circuit, electric current is larger, cause more to radiator fan
Big damage, security is not high；Three is sampling resistor 103 resistance less (generally 0.1 ohm, or even 0.01 ohm), and goes here and there
It is associated in radiator fan current supply circuit, after sampling resistor fault, radiator fan cannot run, also just cannot be reliably to radiating
Whether fan breaks down is detected.
Utility model content
The purpose of the utility model embodiment is, provides a kind of failure detector of radiator fan and heat abstractor,
To realize reliably and securely carrying out fault detect to radiator fan, and structure is simple, low cost.
For realizing above-mentioned utility model purpose, embodiment of the present utility model provides a kind of fault detect of radiator fan
Device, including：Detection and control circuit and be arranged on the positive pole of radiator fan and the power supply of described radiator fan positive pole it
Between fault detect branch road and normal power supply branch road；Described fault detect branch road and normal power supply branch circuit parallel connection connect, and are all provided with
It is equipped with electric-controlled switch；Described detection and control circuit respectively with described fault detect branch road and normal power supply branch road in automatically controlled open
Fault detecting point on pass and described fault detect branch road is connected；Described detection and control circuit are used for controlling described fault
Detection branch is not simultaneously turned on the electric-controlled switch in normal power supply branch road, and automatically controlled in controlling described fault detect branch road
Pass through during switch conduction to detect the voltage signal of described fault detecting point, determine the fault type of described radiator fan.
Preferably, described detection and control circuit include controller and the control unit of connected described electric-controlled switch.
Preferably, described electric-controlled switch includes the first electromagentic switching apparatus and the switch portion of the second electromagentic switching apparatus；
First control signal output end of described controller and one end phase of the control unit of described first electromagentic switching apparatus
Connect, the second control signal output end of described controller is connected with one end of the control unit of described second electromagentic switching apparatus
Connect, the other end of the control unit of described first electromagentic switching apparatus and described second electromagentic switching apparatus is all connected with described radiation air
The negative pole of fan；
The switch portion of described first electromagentic switching apparatus is connected on the first switch portion of described second electromagentic switching apparatus
In described fault detect branch road, the second switch portion of described second electromagentic switching apparatus is connected in described normal power supply branch road,
Described first switch portion is different with the on off operating mode in second switch portion；Or, the switch portion string of described first electromagentic switching apparatus
It is associated in described fault detect branch road, the switch portion of described second electromagentic switching apparatus is connected in described normal power supply branch road.
Preferably, described fault detect branch road includes the first diode, the second diode and the divider resistance being sequentially connected in series,
Wherein, described first diode and described divider resistance correspond to respectively and are located at described radiator fan side and described mains side.
Preferably, described device also includes：For sensing the temperature sensor of the environment temperature residing for described radiator fan,
Described temperature sensor is connected with described detection and control circuit, and described detection and control circuit are used in described temperature sensor
Sensing result control the electric-controlled switch in described fault detect branch road to turn on when exceeding preset temperature threshold value.
Preferably, described controller includes main control module, analogue collection module, temperature collect module and output switch parameter
Module；
The input of described analogue collection module connects described fault detecting point, the input of described temperature collect module
Connect the output end of described temperature sensor, described analogue collection module is connected institute respectively with the output end of temperature collect module
State two inputs of main control module；The input of described switching value output module connects the output end of described main control module, institute
The output end stating switching value output module connects the control unit of described electric-controlled switch.
Preferably, described controller is PLC.
Preferably, described first electromagentic switching apparatus are relay, and/or, described second electromagentic switching apparatus are relay
Device.
Preferably, described device also includes the alarm module being connected with described controller.
Embodiment of the present utility model additionally provides a kind of heat abstractor, including：Radiator fan and such as previous embodiment
The failure detector of described radiator fan.
The failure detector of radiator fan and heat abstractor that the utility model embodiment provides, by radiator fan
The fault detect branch road being connected in parallel and normal power supply branch road are set and power supply between, are controlled by detection and control circuit and set respectively
The electric-controlled switch put in this two branch roads does not simultaneously turn on, and when the electric-controlled switch in controlling fault detect branch road turns on,
By detecting the voltage signal of the fault detecting point on fault detect branch road, determine the fault type of radiator fan.Thus realizing
Reliably and securely fault detect is carried out to radiator fan, and structure is simple, low cost.
Brief description
Fig. 1 is the structured flowchart of the failure detector of radiator fan of prior art；
Fig. 2 is the structured flowchart of the failure detector of radiator fan of the utility model embodiment one；For convenience of understanding,
In figure shows radiator fan and power supply；
Fig. 3 is the circuit structure block diagram of the failure detector of radiator fan of the utility model embodiment two；
Fig. 4 is the circuit structure diagram of the failure detector of radiator fan of the utility model embodiment three.
Specific embodiment
Below in conjunction with the accompanying drawings the failure detector and heat abstractor of the utility model embodiment radiator fan is carried out in detail
Thin description.Following examples are used for the utility model is described, but are not limited to scope of the present utility model.
It will be understood by those skilled in the art that the term such as " first ", " second " in the utility model embodiment is only used for
Difference different step, equipment or module etc., neither represent any particular technology implication, also do not indicate that the inevitable logic between them
Sequentially.
Embodiment one
Fig. 2 is the structured flowchart of the failure detector of radiator fan of the utility model embodiment one.With reference to Fig. 2, dissipate
The failure detector of Hot-air fan includes detection and control circuit 201 and the positive pole and the radiation air that are arranged on radiator fan 202
Fault detect branch road 204 between the positive pole of power supply 203 of fan and normal power supply branch road 205, fault detect branch road 204 and normal
Power supply branch road 205 is connected in parallel, and is provided with electric-controlled switch (not shown)；Detection and control circuit 201 respectively with therefore
Electric-controlled switch in barrier detection branch 204 and normal power supply branch road 205 and the fault detecting point phase on fault detect branch road 204
Connect；Detection and control circuit 201 are used for controlling electric-controlled switch in fault detect branch road 204 and normal power supply branch road 205 not
Simultaneously turn on, and by detecting the voltage letter of fault detecting point when the electric-controlled switch in controlling fault detect branch road 204 turns on
Number, determine the fault type of radiator fan 202.Additionally, the detection shown in Fig. 2 and control circuit 201 are propped up with fault detect respectively
The implication of the dotted line between road 204 and normal power supply branch road 205 is mainly control planning, does not limit the connection being interpreted as reality
Relation.
In concrete implementation mode, it is first before starting normal power supply branch road 205, connects fault detect branch road
204 are detected.I.e. when radiator fan 202 is debugged first, detection and control circuit 201 control fault detect branch road 204 to connect
Logical, radiator fan 202 obtains electric operation.Now, detection and control circuit 201 gather the fault detect on fault detect branch road 204
The voltage signal of point, and record the voltage signal collecting.When carrying out radiator fan fault detect later, can be with this value as fault
The a reference value judging.It should be noted that in actual applications, event can be determined according to specific circuit structure, actual voltage value
The particular location of the fault detecting point in barrier detection branch 204.
Next to that debugging as after working properly first in radiator fan 202, can be according to such as radiator fan 202 local environment
Temperature exceed temperature threshold, the setting trigger condition such as failure detection time, connect fault detect branch road 204 and carry out fault inspection
Survey.Subsequent embodiment will be described in detail as trigger condition to temperature, will not be described here.
Hereinafter the principle of fault detect is described in detail.Pass between motor speed according to radiator fan and electric current
It is shown in formula such as following formula (1)：
Wherein, n is motor speed, and U is armature voltage, and I is armature supply, and R is the resistance of armature circuit, and L is armature electricity
Sense,It is magnetic flux, K is induction electric potential constant.
Can be seen that armature voltage one timing from formula (1), motor speed is lower, and electric current is bigger, therefore, detection embodies and dissipates
The voltage parameter of the size of current of Hot-air fan is it becomes possible to judge to the running status of radiator fan.Correspondingly, in this enforcement
In example, the voltage signal of detection fault detecting point, the fault type of radiator fan 202 is determined according to this voltage signal.Various events
The concrete basis for estimation of barrier type is following (being illustrated with the voltage of power supply 23 for 24V in the present embodiment)：
1) if the magnitude of voltage of fault detecting point is aforementioned basic value, radiator fan is normal；
2) if the magnitude of voltage of fault detecting point is more than predetermined voltage threshold and is less than a reference value, the fault of radiator fan
Type is to owe lubrication；
3) if the magnitude of voltage of fault detecting point is less than predetermined voltage threshold, the fault type of radiator fan is stall；
4) if the magnitude of voltage of fault detecting point is 0V, there is open circuit in fault detect branch road；
5) if the magnitude of voltage of fault detecting point is 1V, the fault type of radiator fan is short circuit；
6) if the magnitude of voltage of fault detecting point is 23V, fault detect branch road is short-circuited；
7) if the magnitude of voltage of fault detecting point is 23.5V, the fault type of radiator fan is open circuit.
Wherein, for the first situation above-mentioned：Testing result is radiator fan fault-free.After detection fault-free, can connect
Logical normal power supply branch road 205 is radiated using radiator fan 202.
It should be noted that it is separately positioned due to fault detect branch road 204 and normal power supply branch road 205, in fault inspection
When survey branch road 204 occurs open circuit or short circuit, do not interfere with the operation of radiator fan 202.Detection and control circuit 201 can bases
The last radiator fan failure detection result, controls normal power supply branch road 205 to connect, thus normally starting radiator fan
202.
In actual applications, would generally be realized to fault detect using controller (as PLC) in detection and control circuit
The break-make of the electric-controlled switch in branch road and normal power supply branch road controls.It should be noted that the application make use of controller
Conventional treatment function, the whole circuit structure of the failure detector being improved by radiator fan of the application.
The failure detector of the radiator fan that the utility model embodiment provides, by between radiator fan and power supply
The fault detect branch road being connected in parallel and normal power supply branch road are set, are controlled by detection and control circuit and be separately positioned on this two
Electric-controlled switch in branch road does not simultaneously turn on, and when the electric-controlled switch in controlling fault detect branch road turns on, by detection event
The voltage signal of the fault detecting point in barrier detection branch, determines the fault type of radiator fan.It is achieved thereby that it is safe and reliable
Ground carries out fault detect to radiator fan, and structure is simple, low cost.Further, since employ parallel branch mode so that
Fault detect branch road and normal power supply branch road are each independent, do not interact.Further increase the reliability of device.
Embodiment two
Fig. 3 is the circuit structure block diagram of the failure detector of radiator fan of the utility model embodiment two, can be considered
A kind of specific implementation of Fig. 2 shown device embodiment.With reference to Fig. 3, compare the apparatus structure of embodiment illustrated in fig. 2, in Fig. 3
Particularly illustrate the specific implementation of fault detect branch road 204, the specific implementation of normal power supply branch road 205, Yi Jijian
Survey and the specific implementation of control circuit 201.
With reference to Fig. 3, the first diode 301 that fault detect branch road 204 includes being sequentially connected in series, the second diode 302 and point
Piezoresistance 303, wherein, the first diode 301 and divider resistance 303 correspond to respectively and are located at radiator fan side and mains side.
Specifically, the negative pole of the first diode 301 is one end of fault detect branch road 204, is just connecting radiator fan 202
Pole, divider resistance 203 is the other end of fault detect branch road 204, connects the positive pole of power supply 203.Here, the first diode 301
Can be all pressure drop diode with the second diode 302.
In the present embodiment, the voltage signal of this fault detecting point is the cathode voltage of the second diode 302.Here, dissipate
The internal resistance of Hot-air fan 202 can be 100 ohms, and the resistance of divider resistance 303 can be with the internal resistance one of radiator fan 202
Cause, or the internal resistance more than radiator fan 202.
It should be noted that fault detect herein make use of partial pressure detection mode, that is, each element of Main Basiss point
Pressure value, concrete form can have multiple changes.Therefore, the one or two pole in including but not limited to above-mentioned fault detect branch road 204
The form of the circuit structure of pipe 301, the second diode 302 and divider resistance 303 composition it is possible to understand that ground, for example, passes through adjustment
The deformation of the circuit structures such as the position relationship between each element, change component type, increase component kind belongs to the application
The technical scope protected.
Detection and control circuit 201 include the control unit 305 of controller 304 and connected electric-controlled switch.Wherein, electricity
Control switch includes the first electromagentic switching apparatus 3K1 and the switch portion of the second electromagentic switching apparatus 3K2.
First control signal output end of controller 304 and one end A2 phase of the control unit of the first electromagentic switching apparatus 3K1
Connect, the second control signal output end of controller 304 is connected with one end A4 of the control unit of the second electromagentic switching apparatus 3K2
Connect, the other end of the control unit of the other end A1 of the control unit of the first electromagentic switching apparatus 3K1 and the second electromagentic switching apparatus 3K2
A3 is all connected with the negative pole of radiator fan 202；One end 11 of the switch portion of the first electromagentic switching apparatus 3K1 connects divider resistance 303,
The one end in the first switch portion of the other end 12 of the switch portion of the first electromagentic switching apparatus 3K1 and the second electromagentic switching apparatus 3K2
13 connections, the other end 14 in the first switch portion of the second electromagentic switching apparatus 3K2 connects power supply 203, the second electromagentic switching apparatus
The one end 23 in the second switch portion of 3K2 connects radiator fan 202, and the other end 24 connects power supply 203, and first switch portion and second opens
The on off operating mode in pass portion is different.
Specifically, in conjunction with the particular circuit configurations of above-mentioned fault detect branch road 204, the first electromagentic switching apparatus 3K1 opens
Pass portion can be connected on the partial pressure in power supply 203 and fault detect branch road 204 with the first switch portion of the second electromagentic switching apparatus 3K2
Between resistance 303.Wherein, above-mentioned first switch portion different with the on off operating mode in second switch portion that is to say, that the second electromagnetism is opened
Close the first switch portion of device 3K2 and second switch portion obtain, under same control signal, thering is contrary action in its control unit,
Second switch portion closure when i.e. first switch portion disconnects, or during first switch portion closure, second switch portion disconnects.Generally, power supply
203 is 24V power supply, for providing 24V power supply for the controller 304 in radiator fan 202 and detection and control circuit 201.
It is emphasized that in the specific implementation of electric-controlled switch, can be with the control unit of above-mentioned electromagentic switching apparatus
Its switch portion closure or the mode of disconnection is controlled to realize.But not limited to this, for example, also can directly by controller 304 pass through have
Line or wireless mode send control signal to electric-controlled switch, to realize controlling fault detect branch road 204 and normal power supply branch road 205
Do not simultaneously turn on.
Preferably, the first electromagentic switching apparatus 3K1 can be relay, and/or, the second electromagentic switching apparatus 3K2 is permissible
For relay.
As an example it is assumed that the switch portion of the first electromagentic switching apparatus 3K1 is normally opened contact, the second electromagentic switching apparatus
The first switch portion of 3K2 is normally-closed contact, and the second switch portion of the second electromagentic switching apparatus 3K2 is normally opened contact.When the first electricity
The control unit (i.e. coil) of magnetic switching device 3K1 electric after, the switch portion of the first electromagentic switching apparatus 3K1 is that normally opened contact is inhaled
Close, now fault detect branch road 204 is connected, radiator fan 202 obtains electric operation, carries out the fault detect of radiator fan 202；When
The control unit (i.e. coil) of two electromagentic switching apparatus 3K2 electric after, the first switch portion of the second electromagentic switching apparatus 3K2 is normally closed
Contact disconnects, and the second switch portion of the second electromagentic switching apparatus 3K2 is normally opened contact adhesive, and now normal power supply branch road 205 connects
Logical, radiator fan 202 obtains electric operation and is radiated.
Further, this failure detector may also include：For sensing the temperature of the environment temperature residing for radiator fan 202
Degree sensor 306, temperature sensor 306 is connected with detection and control circuit 201, and detection and control circuit 201 are used in temperature
The sensing result of sensor 306 exceedes the electric-controlled switch conducting controlling during preset temperature threshold value in fault detect branch road 204.In tool
In the implementation of body, except using super temperature threshold as triggering fault detect condition in addition to, can also set according to certain time
Put detection.
Aforementioned controllers 304 may particularly include main control module 3041, analogue collection module 3042, temperature collect module
3043 and switching value output module 3044.Here, controller 304 can be programmable logic controller (PLC) (Programmable
Logic Controller, PLC).
Wherein, the input connecting fault test point of analogue collection module 3042, the input of temperature collect module 3043
End connects the output end of temperature sensor 306, and the output end of analogue collection module 3042 and temperature collect module 3043 is respectively
Connect two inputs of main control module 3041；The input of switching value output module 3044 connects the output of main control module 3041
End, the output end of switching value output module 3044 connects the control unit 305 of electric-controlled switch.
In concrete implementation mode, temperature collect module 3043 gathers regulator cubicle temperature, regulator cubicle taking regulator cubicle as a example
Temperature is the environment temperature residing for radiator fan 202.Judge that the regulator cubicle temperature value collecting surpasses in main control module 3041
When crossing preset temperature threshold value, analogue collection module 3042 is controlled to pass through between fault detecting point and analogue collection module 3042
Circuit (as analog acquisition circuit) detect fault detecting point the magnitude of voltage (negative pole of the second diode 302 as shown in Figure 3
Voltage), the collectable voltage range of analogue collection module 3042 is 0～24V.Main control module 3041 is according to the fault detecting
The magnitude of voltage of test point determines the fault type of radiator fan 202, then according to the fault type controlling switch amount output mould determining
Output switch amount signal gives the first electromagentic switching apparatus 3K1 and the second electromagentic switching apparatus 3K2, to control series connection to block 3044 respectively
The adhesive in second switch portion of the second electromagentic switching apparatus 3K2 in normal power supply branch road 205 and disconnection, and it is connected on event
The switch portion of the first electromagentic switching apparatus 3K1 in barrier detection branch 204 and the first switch portion of the second electromagentic switching apparatus 3K2
Adhesive and disconnection, thus realizing controlling the break-make of two branch roads, complete the fault detect of radiator fan 202.Need explanation
It is that the first control signal output end of aforementioned controllers 304 and the second control signal output end are switching value as shown in Figure 3
Two ports of output module 3044 output switch amount signal.
Here, said temperature threshold value is not the alarm threshold value of usual definition.As an example it is assumed that the report of usual regulator cubicle
Alert threshold value is 100 DEG C, and when that is, in-cabinet temperature is more than 100 DEG C, startup radiator fan is radiated.In order to open in radiator fan
Carry out fault detect, " temperature threshold " in the present embodiment can be set as 90 DEG C, or can be this warning before dynamic radiating
I.e. 60 DEG C of the setting ratio (as 60%) of threshold value, that is, carry out fault detect in advance before radiator fan work.
Hereinafter the course of work of the failure detector of the radiator fan of the present embodiment is described in detail.
When radiator fan is debugged first, main control module 3041 controlling switch amount output module 3044 is so that the first electromagnetism
The coil of switching device 3K1 obtains electric, and now fault detect branch road 204 is connected, radiator fan 202 electric operation.Analog acquisition
Module 3042 gathers the cathode voltage of the second diode 302, and recording voltage value, when carrying out radiator fan fault detect later,
Can a reference value with this value as breakdown judge.Here, for a reference value of breakdown judge, an initial value can be first set, then
Partial pressure value according to diode during normal work, to determine, can accomplish self-adaptative adjustment for various types of circuit, no
With pre-setting.
Radiator fan 202 is debugged first as after working properly, surpassing the environment temperature residing for radiator fan 202 is detected
When crossing preset temperature threshold value, with predetermined time interval controlling switch amount output module 3044 so that control the first electromagentic switching apparatus
, so that fault detect branch road 204 is connected, normal power supply branch road 205 disconnects for 3K1, the second electromagentic switching apparatus 3K2.According to enforcement
Relational expression (1) between the motor speed of the radiator fan described in example one and electric current can draw, armature voltage one timing, electricity
Machine rotating speed is lower, and electric current is bigger, and then can become big according to the magnitude of voltage on Ohm's law divider resistance, and supply voltage is constant,
So the magnitude of voltage of fault detecting point that analogue collection module 3042 collects can diminish.Specifically, various fault types
Basis for estimation is as follows：
1) if be worth on the basis of the second diode 302 cathode voltage, radiator fan is normal；
2) if the second diode 302 cathode voltage is more than predetermined voltage threshold and is less than a reference value, radiator fan
Fault type is to owe lubrication；
3) if the second diode 302 cathode voltage is less than predetermined voltage threshold, the fault type of radiator fan is stifled
Turn；
4) if the second diode 302 cathode voltage is 0V, there is open circuit in fault detect branch road；
That is, because the switch portion of the first electromagentic switching apparatus 3K1 connects fault detect branch road 204, if second
Diode 302 cathode voltage for 0V then it represents that not having voltage in fault detect branch road 204, then send out by divider resistance 303 place branch road
Raw open circuit, that is, there is open circuit in fault detect branch road 204；
5) if the second diode 302 cathode voltage is 1V, the fault type of radiator fan is short circuit；
If the second diode 302 cathode voltage is 1V, that is, the cathode voltage of the first diode 301 is 0V, is equivalent to straight
Connect the negative pole of short circuit power supply 203, show radiator fan 202 internal short-circuit.It should be noted that due to divider resistance 303 resistance
Larger, even if so in radiator fan internal short-circuit it is also possible to the short time connects fault detect branch road 204 carries out fault inspection
Survey, power supply 203 will not be impacted；
6) if the second diode 302 cathode voltage is 23V, fault detect branch road is short-circuited；
That is, because the switch portion of the first electromagentic switching apparatus 3K1 connects fault detect branch road the 204, the 2nd 2 pole
The pressure drop constant (about 1V) of pipe 302, if the second diode 302 cathode voltage is that (supply voltage deducts the second diode to 23V
302 pressure drop), then divider resistance 303 place branch road is short-circuited, and that is, fault detect branch road 204 is short-circuited；
7) if the second diode 302 cathode voltage is that (cathode voltage is the value close to 24V to 23.5V, due to because two poles
Pipe also will produce some pressure drops, such as 23.5V), then the fault type of radiator fan is open circuit.
In above-mentioned seven kinds of situations, radiator fan 202 is short-circuited, open circuit, stall, owe lubrication in any one failure classes
During type, main control module 3041 will controlling switch amount output module 3044, the control unit making the second electromagentic switching apparatus 3K2 must not
Electricity, normal power supply branch road 205 is off, thus not starting radiator fan 202, and sends warning, notifies operation maintenance personnel
Keeped in repair.Warning herein can be that software is reported to the police, and is shown by CSRC.Further, it is also possible to it is real by hardware alarms
Existing.
Correspondingly, the failure detector of this radiator fan can also include the alarm module being connected with controller 304
(not shown).In actual applications, alarm module can be alarm lamp or alert tone generator (as buzzer),
But not limited to this.
The failure detector of the radiator fan that the utility model embodiment provides, on the basis of previous embodiment, also
Have the following technical effect that：
On the one hand, prior art adopts sampling resistor and electronic circuit (as amplifier, comparator) to realize radiator fan
Fault detect, by comparison, the completely left out electronic circuit of the present embodiment, drastically increase the reliability of device；
On the other hand, in the present embodiment, because fault detect branch road is separately positioned with normal power supply branch road, in divider resistance
When place branch road (i.e. fault detect branch road) is short-circuited or is breaking, it is not belonging to radiator fan fault, does not interfere with radiation air
The operation of fan and fault detect.If additionally, divider resistance in radiator fan short circuit occurred inside, but still can start radiation air
In the case of fan, whole device (especially power supply) is played a protective role.
Another aspect, by the first electromagentic switching apparatus and the second electromagentic switching apparatus (as relay), and master control mould
Block, analogue collection module, temperature collect module, switching value output module cooperate, thus being accurately controlled fault detect
Branch road and the break-make of normal power supply branch road, and then improve the degree of accuracy of the fault detect of radiator fan；
Another further aspect, senses the environment temperature residing for radiator fan by temperature sensor, exceedes in temperature sensing result
During temperature threshold control fault detect branch road electric-controlled switch conducting it is achieved that radiator fan normal power supply work before pre- advanced
Row fault detect.Additionally, can more directly, rapidly notify related personnel to be keeped in repair by alarm module.
Embodiment three
Fig. 4 is the circuit structure diagram of the failure detector of radiator fan of the utility model embodiment three, can be considered Fig. 2
Another kind of specific implementation of shown device embodiment.Electricity with the failure detector of the radiator fan shown in embodiment two
Line structure figure is compared, and in the present embodiment, the specific implementation of electric-controlled switch is different.Other components such as first diode
301st, the second diode 302, divider resistance 303, main control module 3041 etc. are all identical with content described in embodiment two, specifically can join
See above-described embodiment two, will not be described here.
As shown in figure 4, the control unit of the first control signal output end of controller 304 and the first electromagentic switching apparatus 4K1
One end A6 be connected, the one of the second control signal output end of controller 304 and the control unit of the second electromagentic switching apparatus 4K2
End is connected, the control unit of the other end A5 of the control unit of the first electromagentic switching apparatus 4K1 and the second electromagentic switching apparatus 4K2
Other end A7 connects the negative pole of radiator fan 202；The switch portion of the first electromagentic switching apparatus 4K1 is connected on fault detect branch road
In 204, the switch portion of the second electromagentic switching apparatus 4K2 is connected in normal power supply branch road 205.Specifically, in conjunction with aforementioned enforcement
The particular circuit configurations of the fault detect branch road 204 described in example two, the switch portion of the first electromagentic switching apparatus 4K1 can be connected on electricity
Between divider resistance 303 in source 203 and fault detect branch road 204.
As an example it is assumed that the switch portion of the first electromagentic switching apparatus 4K1 is normally opened contact, the second electromagentic switching apparatus
The switch portion of 4K2 is normally opened contact, when the control unit (i.e. coil) of the first electromagentic switching apparatus 4K1 obtains electric, the second electromagnetic switch
The control unit of device 4K2 must not be electric, and the switch portion of the first electromagentic switching apparatus 4K1 is normally opened contact adhesive, the second electromagnetic switch
The switch portion of device 4K2 is that normally opened contact remains open, and now normal power supply branch road 205 is disconnected, and fault detect branch road 204 connects
Logical, radiator fan 202 obtains electric operation, carries out the fault detect of radiator fan 202.
When the first electromagentic switching apparatus 4K1 control unit must not electricity, the control unit of the second electromagentic switching apparatus 4K2 obtain electric,
The switch portion of the first electromagentic switching apparatus 4K1 is that normally opened contact disconnects, and the switch portion of the second electromagentic switching apparatus 4K2 is normally opened touching
Put adhesive, now normal power supply branch road 205 is connected, and fault detect branch road 204 disconnects, radiator fan 202 obtains electric operation and dissipated
Heat.
The failure detector of the radiator fan that the utility model embodiment provides, compared with previous embodiment two, first
Electromagentic switching apparatus and the second electromagentic switching apparatus are all that a control unit corresponds to a switch portion, and circuit structure is more succinct.
Simultaneously so that the break-make control logic of fault detect branch road and normal power supply branch road is also simpler.
Example IV
Heat abstractor includes radiator fan and as arbitrary described in previous embodiment one, embodiment two and embodiment three
The failure detector of radiator fan.
The heat abstractor that the utility model embodiment provides, is connected in parallel by setting between radiator fan and power supply
Fault detect branch road and normal power supply branch road, are controlled be separately positioned in this two branch roads automatically controlled to open by detection and control circuit
Close and do not simultaneously turn on, and when the electric-controlled switch in controlling fault detect branch road turns on, by detecting on fault detect branch road
The voltage signal of fault detecting point, determines the fault type of radiator fan.It is achieved thereby that carrying out radiating treatment in radiator fan
While, reliably and securely can detect to whether radiator fan breaks down, and circuit structure is simple, low cost.
The above, specific embodiment only of the present utility model, but protection domain of the present utility model does not limit to
In this, any those familiar with the art, in the technical scope that the utility model discloses, can readily occur in change
Or replace, all should cover within protection domain of the present utility model.Therefore, protection domain of the present utility model should be with described power
The protection domain that profit requires is defined.
Claims (10)
1. a kind of failure detector of radiator fan is it is characterised in that include：Detection and control circuit and be arranged on scattered
Fault detect branch road between the positive pole of the power supply of the positive pole of Hot-air fan and described radiator fan and normal power supply branch road；Described event
Barrier detection branch and normal power supply branch circuit parallel connection connect, and are provided with electric-controlled switch；Described detection and control circuit respectively with
Electric-controlled switch in described fault detect branch road and normal power supply branch road and the fault detecting point on described fault detect branch road
It is connected；
Described detection and control circuit are used for controlling described fault detect branch road different from the electric-controlled switch in normal power supply branch road
When conducting, and control described fault detect branch road in electric-controlled switch conducting when by detect described fault detecting point voltage
Signal, determines the fault type of described radiator fan.
2. failure detector according to claim 1 is it is characterised in that described detection and control circuit include controller
And the control unit of connected described electric-controlled switch.
3. failure detector according to claim 2 is it is characterised in that described electric-controlled switch includes the first electromagnetic switch
Device and the switch portion of the second electromagentic switching apparatus；
First control signal output end of described controller is connected with one end of the control unit of described first electromagentic switching apparatus,
Second control signal output end of described controller is connected with one end of the control unit of described second electromagentic switching apparatus, described
The other end of the control unit of the first electromagentic switching apparatus and described second electromagentic switching apparatus is all connected with the negative of described radiator fan
Pole；
The first switch portion of the switch portion of described first electromagentic switching apparatus and described second electromagentic switching apparatus is connected on described
In fault detect branch road, the second switch portion of described second electromagentic switching apparatus is connected in described normal power supply branch road, described
First switch portion is different with the on off operating mode in second switch portion；Or, the switch portion of described first electromagentic switching apparatus is connected on
In described fault detect branch road, the switch portion of described second electromagentic switching apparatus is connected in described normal power supply branch road.
4. the failure detector according to any one of claim 1-3 is it is characterised in that described fault detect branch road bag
Include the first diode being sequentially connected in series, the second diode and divider resistance, wherein, described first diode and described divider resistance
Correspond to respectively and be located at described radiator fan side and described mains side.
5. the failure detector according to Claims 2 or 3 is it is characterised in that described device also includes：For sensing
State the temperature sensor of the environment temperature residing for radiator fan, described temperature sensor is connected with described detection and control circuit,
Described detection and control circuit are used for controlling described event when the sensing result of described temperature sensor exceedes preset temperature threshold value
Electric-controlled switch conducting in barrier detection branch.
6. failure detector according to claim 5 is it is characterised in that described controller includes main control module, simulation
Amount acquisition module, temperature collect module and switching value output module；
The input of described analogue collection module connects described fault detecting point, and the input of described temperature collect module connects
The output end of described temperature sensor, described analogue collection module is connected described master respectively with the output end of temperature collect module
Two inputs of control module；
The input of described switching value output module connects the output end of described main control module, described switching value output module defeated
Go out the control unit that end connects described electric-controlled switch.
7. failure detector according to claim 6 is it is characterised in that described controller is PLC.
8. failure detector according to claim 3 is it is characterised in that described first electromagentic switching apparatus are relay
Device, and/or, described second electromagentic switching apparatus are relay.
9. failure detector according to claim 5 is it is characterised in that described device also includes and described controller phase
The alarm module connecting.
10. a kind of heat abstractor is it is characterised in that described heat abstractor includes：In radiator fan and such as claim 1～9
The failure detector of the radiator fan described in any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620858572.8U CN205941737U (en) | 2016-08-09 | 2016-08-09 | Radiator fan's fault detection device and heat abstractor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620858572.8U CN205941737U (en) | 2016-08-09 | 2016-08-09 | Radiator fan's fault detection device and heat abstractor |
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| Publication Number | Publication Date |
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| CN205941737U true CN205941737U (en) | 2017-02-08 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107589327A (en) * | 2017-09-19 | 2018-01-16 | 天津康途科技有限公司 | A kind of detection means of fan of frequency converter failure |
| CN110996483A (en) * | 2019-12-19 | 2020-04-10 | 斯比夫（西安）照明技术有限公司 | Fault detection system for railway locomotive illuminating lamp |
| CN114184970A (en) * | 2021-11-24 | 2022-03-15 | 北京海博思创科技股份有限公司 | Battery system, control method, device, apparatus, storage medium, and program product |
-
2016
- 2016-08-09 CN CN201620858572.8U patent/CN205941737U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107589327A (en) * | 2017-09-19 | 2018-01-16 | 天津康途科技有限公司 | A kind of detection means of fan of frequency converter failure |
| CN110996483A (en) * | 2019-12-19 | 2020-04-10 | 斯比夫（西安）照明技术有限公司 | Fault detection system for railway locomotive illuminating lamp |
| CN114184970A (en) * | 2021-11-24 | 2022-03-15 | 北京海博思创科技股份有限公司 | Battery system, control method, device, apparatus, storage medium, and program product |
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