CN208806600U - A kind of electric heater protective device and air-conditioner set - Google Patents
A kind of electric heater protective device and air-conditioner set Download PDFInfo
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- CN208806600U CN208806600U CN201821614197.8U CN201821614197U CN208806600U CN 208806600 U CN208806600 U CN 208806600U CN 201821614197 U CN201821614197 U CN 201821614197U CN 208806600 U CN208806600 U CN 208806600U
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- China
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- electric heater
- mainboard
- fuse
- optocoupler
- major loop
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Abstract
The utility model discloses a kind of electric heater protective device and air-conditioner set, which includes: fuse and temperature limiter, is arranged on the major loop of electric heater；Wherein, control switch, the energization or power-off of the major loop of the control signal control electric heater for being exported according to mainboard；Mainboard is connect with control switch and optocoupler respectively, for state control switch output control signal；Alternatively, if detecting the low level signal that optocoupler is exported due to conducting, issuing the first prompting message of control switch failure in the case where electric heater does not work normally.The embodiment of the utility model, can solve not can be implemented simultaneously temperature limiter and fuse-link all and can effectively disconnect electric heater major loop and the on-off that can detect electric heater and there is a problem of that protection reliability is low, achieve the effect that promote protection reliability.
Description
Technical field
The utility model belongs to air-conditioning technical field, and in particular to a kind of electric heater protective device, air-conditioner set are (as empty
Adjust constant temperature and humidity unit) and its electric heater guard method more particularly to a kind of safe reliable electric heater protective device,
Electric heater guard method with the air-conditioner set of the device and the air-conditioner set.
Background technique
Constant temperature and humidity machine requires temperature and humidity relatively high in air-conditioner set, and electricity is required out in refrigeration and heating and is added
Can hot device, protected mode and unit judge whether electric heater disconnects and all be very important.And unit use at present
Electric heater protected mode, one is: for unit using temperature limiter string in 12V control loop, fuse-link string is main on major loop
Plate carries out protected by temperature limitation by detecting the on-off of temperature limiter；Another kind is: the temperature limiter and fuse-link of unit, which are all gone here and there, to be led back
On the road, 12V control detection interface is shorted.
But all there is drawback in this two kinds of protected modes, can not solve simultaneously both of these problems: temperature limiter and fuse-link are all
The problem of electric heater major loop can effectively be disconnected, and the problem of can detect the on-off of electric heater.
Utility model content
The purpose of this utility model is that in view of the foregoing drawbacks, a kind of electric heater protective device and air-conditioner set are provided,
Not can be implemented simultaneously temperature limiter and fuse-link in the prior art all with solution can effectively disconnect electric heater major loop and can detect
To electric heater on-off and there is a problem of that protection reliability is low, achieve the effect that promoted protection reliability.
The utility model provides a kind of electric heater protective device, comprising: fuse, temperature limiter, control switch, mainboard and
Optocoupler；The fuse and the temperature limiter, are arranged on the major loop of the electric heater；Wherein, the control switch is used
The energization or power-off of the major loop of the electric heater are controlled in the control signal exported according to the mainboard；The of the optocoupler
One signal input part is connected to the first input interface of the mainboard, and the second signal input terminal of the optocoupler is connected to the master
Second input interface of plate, the signal output end of the optocoupler are connected to the I/O port of the mainboard；The mainboard, respectively with it is described
Control switch is connected with the optocoupler, for exporting the control signal to the control switch；Alternatively, in the electric heater
In the case where not working normally, if detecting the low level signal that the optocoupler is exported due to conducting, the control is issued
First prompting message of switch fault.
Optionally, further includes: the first connecting line and the second connecting line；Wherein, first connecting line is arranged in the electricity
Between first connecting pin of heater and the first input interface of the mainboard；Second connecting line, setting add in the electricity
Between the second connection end of hot device and the second input interface of the mainboard；The mainboard, if being also used to detect the optocoupler
Conducting, it is determined that the major loop of the electric heater works normally；If detecting, the optocoupler is not turned on, it is determined that the fusing
Device and/or the temperature limiter disconnect.
Optionally, the mainboard determines that the fuse and/or the temperature limiter disconnect, comprising: if the optocoupler is not led
Logical duration is greater than setting duration, it is determined that the fuse disconnects, and initiates the second prompt that the fuse disconnects
Message；Alternatively, if the duration that the optocoupler does not turn on is less than or equal to setting duration, it is determined that the temperature limiter disconnection,
And the fuse does not disconnect.
Optionally, on the firewire for the AC power source that the fuse and the temperature limiter are arranged at the electric heater,
And the temperature limiter is arranged between the fuse and the electric heater；Wherein, the fuse, for adding to the electricity
The major loop of hot device carries out the first overheat protector based on the first set temperature；And/or the temperature limiter, for the electricity
The major loop of heater carries out the second overheat protector based on the second set temperature；Second set temperature is less than described first
Set temperature.
Optionally, the control switch, comprising: A.C. contactor；The normally opened contact of the A.C. contactor is arranged in institute
It states on the major loop of electric heater；The electromagnetic coil of the A.C. contactor, be arranged in the AC power source of the mainboard with it is described
Between the control signal output interface of mainboard.
Optionally, the control switch failure, comprising: the normally opened contact adhesion of the A.C. contactor.
Optionally, the optocoupler, setting is on the main board.
Match with above-mentioned apparatus, the utility model another further aspect provides a kind of air-conditioner set, comprising: above-described electricity
Heater protective apparatus.
The embodiment of the utility model, by all can effectively disconnect electric heater major loop using temperature limiter and/or fuse-link,
It can make air-conditioner set electric heater in the case where contacts of contactor adhesion and air-conditioner set non-dry combustion method, pass through protected by temperature limitation
Disconnect electric heater major loop, will not generate it is dangerous also guarantee will not fuse fuse-link simultaneously, reduce the maintenance of electric heater
Replacement, extends service life, also improves protection reliability.
Further, the embodiment of the utility model by that can detect the on-off of electric heater, and can determine whether out it is that limit temperature is protected
Shield or permanently disconnection protection realize user or can check that breakdown judge goes out the whether recoverable limit temperature of electric heater and breaks after sale
It opens or permanent disconnection conveniently after sale is also beneficial to promote the reliability and safety of protection.
Further, the embodiment of the utility model, by can be disconnected by protected by temperature limitation when contacts of contactor adhesion electricity plus
The major loop of hot device；It can also effectively detect whether electric heater disconnects, can infer whether fuse-link disconnects according to length of time
And failure is reported, the reliability and safety of electric heater protection are improved, is also beneficial to extend the service life of electric heater.
The embodiment of the utility model as a result, by connecing temperature limiter on the major loop of electric heater, while in electric heating
Increase optocoupler detection on the mainboard of device, realizing can be returned by the master that temperature limiter and/or fuse-link all effectively disconnect electric heater
Road, and the on-off of electric heater can be detected to judge that protected by temperature limitation or permanent disconnect are protected；Solve the prior art
In not can be implemented simultaneously temperature limiter and fuse-link all and can effectively disconnect electric heater major loop and can detect the logical of electric heater
It is disconnected and there is a problem of that protection reliability is low, thus, overcome in the prior art that reliability is low, safety is poor and service life is short
Defect realizes high reliablity, the good and with long service life beneficial effect of safety.
Other features and advantages of the utility model will illustrate in the following description, also, partly from specification
In become apparent, or understood and implementing the utility model.
Below by drawings and examples, the technical solution of the utility model is described in further detail.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of an embodiment of the electric heater protective device of the utility model；
Fig. 2 is the structural schematic diagram of the technical solution one of original electric heater protection；
Fig. 3 is the structural schematic diagram of the technical solution two of original electric heater protection；
Fig. 4 is the flow diagram of an embodiment of the electric heater guard method of the utility model；
Fig. 5 be the utility model method in detect electric heater on-off an embodiment flow diagram.
In conjunction with attached drawing, appended drawing reference is as follows in the utility model embodiment:
10- mainboard；20- optocoupler；The first connecting line of 30-；The second connecting line of 40-.
Specific embodiment
It is specific below in conjunction with the utility model to keep the purpose of this utility model, technical solution and advantage clearer
Technical solutions of the utility model are clearly and completely described in embodiment and corresponding attached drawing.Obviously, described embodiment
It is only the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, this field
Those of ordinary skill's every other embodiment obtained without making creative work, belongs to the utility model
The range of protection.
Embodiment according to the present utility model provides a kind of electric heater protective device.Shown in Figure 1 practical new
The structural schematic diagram of one embodiment of the device of type.The electric heater protective device may include: fuse (i.e. fuse
FUT), temperature limiter (i.e. temperature limiter SAT), control switch, mainboard 10 and optocoupler 20.
Wherein, the major loop in the electric heater (i.e. electric heater EH) is arranged in the fuse and the temperature limiter
On.
Optionally, on the firewire for the AC power source that the fuse and the temperature limiter are arranged at the electric heater,
And the temperature limiter is arranged between the fuse and the electric heater, fire of the fuse close to the AC power source
Line setting, the electric heating are arranged close to the zero curve of the AC power source.
Specifically, the fuse can be used for carrying out the major loop of the electric heater based on the first set temperature
The first overheat protector, and first overheat protector is irrecoverable.Such as: fuse-link FUT, it is primary to fuse as overheating protection
It is irrecoverable.
Specifically, the temperature limiter can be used for carrying out the major loop of the electric heater based on the second set temperature
The second overheat protector, and second overheat protector can restore.Second set temperature is less than first set temperature.Example
Such as: temperature limiter SAT can restore as overheating protection, can on-off repeatedly.
As a result, by the way that fuse and temperature limiter to be serially connected in the major loop of electric heater, and fuse is close to electric heating
The AC power source of device is arranged, and can promote the safety of overheat protector, thus be conducive to the protection reliability of lifting electrical heating device,
It is also beneficial to extend the service life of electric heater.
In an optional example, the control switch, be arranged in the electric heater major loop and the mainboard it
Between, it can be used for controlling the energization or power-off of the major loop of the electric heater according to the control signal that the mainboard 10 exports.
Optionally, the control switch may include: A.C. contactor.
Specifically, the normally opened contact of the A.C. contactor is arranged on the major loop of the electric heater close to described
At the zero curve N of the AC power source of electric heater.The exchange in the mainboard (10) is arranged in the electromagnetic coil of the A.C. contactor
Between the zero curve N of power supply and the control signal output interface (i.e. the output interface HEAT of mainboard 10) of the mainboard (10).
Such as: A.C. contactor K1, for controlling the on-off of electric heater EH.
Power on/off by using A.C. contactor as control switch control electric heater as a result, control mode is easy,
And safety is good.
Wherein, the control switch failure may include: the normally opened contact adhesion of the A.C. contactor.
Such as: the major loop of electric heater can be disconnected by protected by temperature limitation when contacts of contactor adhesion.
For another example: temperature limiter and fuse-link all can effectively disconnect electric heater major loop, can make air-conditioner set electric heater
In contacts of contactor adhesion, electric heater major loop is disconnected by protected by temperature limitation under the non-dry-fire condition of unit, it will not
It generates dangerous while also guaranteeing the fuse-link that will not fuse, reduce the maintenance replacement of electric heater.
When as a result, by using A.C. contactor as control switch, the normally opened contact adhesion of A.C. contactor is then determined
Control switch failure, the high reliablity of judgment mode simplicity and judging result.
In an optional example, the first signal input part of the optocoupler 20 is connected to the first input of the mainboard 10
Interface (such as input interface EH1 of mainboard 10), the second signal input terminal of the optocoupler 20 are connected to the second of the mainboard 10
Input interface (such as input interface EH2 of mainboard 10), the signal output end of the optocoupler 20 are connected to the I/O port of the mainboard 10.
Such as: temperature limiter SAT connects on the major loop of electric heater EH, while increasing optocoupler detection on mainboard.
Optionally, the optocoupler 20 is arranged on the mainboard 10.
As a result, by being arranged optocoupler on mainboard, on the one hand facilitating detection, on the other hand occupying little space, route knot
Structure is simple.
In an optional example, the mainboard 10 is connect with the control switch and the optocoupler 20, Ke Yiyong respectively
In exporting the control signal to the control switch；Alternatively, in the case where the electric heater does not work normally (as in institute
State that the affiliated air-conditioner set of electric heater does not work normally, the blower of the air-conditioner set does not operate normally, the mainboard 10 is not defeated
Out in the case of at least one of described control signal), if detecting the letter of the optocoupler 20 by the I/O port of mainboard 10 itself
The low level signal that number output end is exported due to conducting, then issue the first prompting message (such as sound of the control switch failure
One or more alarm signals such as light, voice, text or warning message).Such as: the mainboard 10, it can be according to the optocoupler
20 feedback signal determine the control switch whether failure, and initiate prompting message in the case where the control switch failure
Or standby signal.Such as: mainboard can be used for exporting the control signal of control contactor；And detection signal is received, in progress
Portion judges and exports alarm signal.
Such as: when working properly, under blower normal operation, (i.e. mainboard exports control contactor to the HEAT of mainboard
The voltage signal of K1) output control signal make contactor K1 be closed, electric heater EH normal power-up work, electric heater temperature mistake
Height, temperature limiter SAT carries out protected by temperature limitation and effectively disconnects electric heater EH major loop, and keeps fuse-link FUT normal.
Such as: when non-normal working, blower under operating condition, even if the HEAT of mainboard controls signal without output, is not controlled
When the contactor K1 contact adhesion of electric heater processed, the work of electric heater EH normal power-up, temperature limiter SAT, which carries out protected by temperature limitation, to be had
Effect disconnects electric heater EH major loop, and is blown fuse-link FUT normally not.
Such as: can detect whether adhesion protects contactor K1, when non-normal working, blower is under operating condition,
The HEAT of mainboard controls signal, and the EH2 (i.e. the second input interface of mainboard) of mainboard and EH1 (i.e. the first of mainboard without output
Input interface) between have voltage 220V, optocoupler is connected, mainboard chip I/O port detects low level, and it is viscous that mainboard issues contactor
Even protection alarm signal.
As a result, by the way that fuse and temperature limiter to be serially connected in the major loop of electric heater, and optocoupler is set at mainboard,
Control switch failure is determined if detecting optocoupler conducting in the case where electric heater does not work normally, improves electric heater
The reliability and safety of protection.
It can also include: the first connecting line 30 and the second connecting line 40 in an optional embodiment.
Wherein, first connecting line 30, is arranged in first of the electric heater on the major loop of the electric heater
Between connecting pin (the i.e. described electric heater is close to one end of the temperature limiter) and the first input interface of the mainboard 10.It is described
Second connecting line 40, be arranged in the electric heater on the major loop of the electric heater second connection end (i.e. it is described electricity plus
Hot device is close to one end of the control switch) and the second input interface of the mainboard 10 between.
In an optional example, the mainboard 10, if can be also used for detecting institute by the I/O port of mainboard 10 itself
State the signal output end conducting of optocoupler 20, it is determined that the major loop of the electric heater works normally；If passing through mainboard 10 itself
I/O port detect that the signal output end of the optocoupler 20 does not turn on (high level signal such as exported due to not turning on), then really
The fixed fuse and/or the temperature limiter disconnect.
Such as: draw on the EH1 on a line to mainboard in the temperature limiter of electric heater and fuse-link front end, this line and zero
An indirect optocoupler of line N, when the HEAT on mainboard has output control signal, the contact closure of contactor K1 can be detected
The on-off of electric heater can determine whether out it is that temperature limiter SAT protection or permanent disconnect protect (FUT disconnection).
Such as: when temperature limiter SAT and fuse-link FUT all under normal circumstances, the entire circuit normally work of electric heater EH
Make, there is voltage 220V, optocoupler conducting between mainboard EH2 and EH1.
Such as: when temperature limiter SAT or fuse-link FUT is disconnected, the entire circuit electric heater EH, which disconnects, not to work, mainboard EH2
No-voltage is poor between EH1, and optocoupler is not turned on.
Such as: when temperature limiter SAT protection, after protected by temperature limitation, the sharp temperature drop of electric heater works as temperature limiter
SAT temperature drop to its can recovery temperature, temperature limiter SAT restores closure, therefore in temperature limiter between the EH2 and EH1 on mainboard
Detection no-voltage difference optocoupler is not turned on when SAT is disconnected, and when temperature limiter SAT restores to be closed, detection has the conducting of voltage difference optocoupler.
As a result, by detect optocoupler conducting then determine electric heater major loop it is normal, detecting optocoupler disconnect
Then determine that the major loop of electric heater disconnects, detection structure is simple and detection mode is convenient, enriches the protection to electric heater
Function also improves the reliability to electric heater protection.
Optionally, the mainboard 10 determines that the fuse and/or the temperature limiter disconnect, if may include: the light
The duration that coupling does not turn on is greater than setting duration, it is determined that the fuse disconnects, and initiate that the fuse disconnects the
Two prompting messages；Alternatively, if the duration that the optocoupler does not turn on is less than or equal to setting duration, it is determined that the temperature limiter
It disconnects and the fuse does not disconnect.
Such as: it can also effectively detect whether electric heater disconnects, can infer whether fuse-link disconnects according to length of time,
Report failure.As can detect the on-off of electric heater, can determine whether out be protected by temperature limitation or it is permanent disconnect protection, realize user or
It can check that breakdown judge goes out warm disconnect of the whether recoverable limit of electric heater and still permanently disconnects after sale, conveniently after sale.
Such as: then temperature limiter SAT protection when being not turned on sometimes is connected in optocoupler sometimes.
Such as: when fuse-link FUT is protected, fuse-link is irrecoverable, and the major loop of electric heater EH is thoroughly disconnected, main
Long-time no-voltage is poor between EH2 and EH1 on plate, and when optocoupler is not turned on for a long time, constant temperature and humidity unit not can guarantee constant temperature
Requirement, need to remind client to replace fuse-link FUT.
It is by the duration judgement not turned in the case where determining that the major loop of electric heater is disconnected according to optocoupler as a result,
Fuse disconnects or temperature limiter disconnects, so that the prompting message that fuse disconnects is initiated in the case where fuse disconnects, with
It is safeguarded in time convenient for user, be conducive to promote maintenance effects and restore the timeliness and reliability of electric heater work, to mention
Rise user experience.
Through a large amount of verification experimental verification, using the technical solution of the utility model, by utilizing temperature limiter and/or fuse-link all
Electric heater major loop can effectively be disconnected, can make air-conditioner set electric heater contacts of contactor adhesion and air-conditioner set it is non-
In the case where dry combustion method, electric heater major loop is disconnected by protected by temperature limitation, will not generate dangerous while also guaranteeing to fuse
Fuse-link reduces the maintenance replacement of electric heater, extends service life, also improve protection reliability.
Embodiment according to the present utility model additionally provides a kind of air-conditioner set corresponding to electric heater protective device.
The air-conditioner set may include: above-described electric heater protective device.
In an optional embodiment, the embodiment of the utility model can be protected when contacts of contactor adhesion by limit temperature
Shield disconnects the major loop of electric heater；It can also effectively detect whether electric heater disconnects, can be inferred according to length of time and be fused
Whether body disconnects, and reports failure.
Optionally, in the embodiment of the utility model, temperature limiter and fuse-link all can effectively disconnect electric heater major loop.From
And air-conditioner set electric heater can be made in contacts of contactor adhesion, pass through protected by temperature limitation under the non-dry-fire condition of unit
Disconnect electric heater major loop, will not generate it is dangerous also guarantee will not fuse fuse-link simultaneously, reduce the maintenance of electric heater
Replacement.
Optionally, in the embodiment of the utility model, can detect the on-off of electric heater, can determine whether out be protected by temperature limitation also
It is that permanent disconnect is protected.To realize user or can check that breakdown judge goes out the whether recoverable limit temperature of electric heater after sale
It disconnects or permanently disconnects, conveniently after sale.
In an optional specific embodiment, can example as shown in connection with fig. 1, to the tool of the embodiment of the utility model
Body realizes that process illustrates.
In Fig. 1, FUT be fuse-link or fuse, it is irrecoverable；SAT is temperature limiter, can be restored；EH is electric heater；
K1 is contactor.
One specific implementation process of the embodiment of the utility model may refer to example shown in FIG. 1.As shown in Figure 1, limit temperature
Device SAT connects on the major loop of electric heater EH, while increasing optocoupler detection on mainboard；Temperature limiter in original technical solution one
SAT connects on the major loop of electric heater EH, and mainboard does not detect interface, can not learn the on-off of temperature limiter SAT, such as can be with
Example shown in Figure 3；Temperature limiter SAT connects between+the 12V and EH1 of mainboard as on-off in original technical solution two
Detection can not be disconnected the major loop of electric heater EH by SAT when such as K1 adhesion, such as may refer to example shown in Fig. 2.
In Fig. 1, the effect of each component may include: fuse-link FUT, and as overheating protection, primary fusing can not be extensive
It is multiple；Temperature limiter SAT can restore as overheating protection, can on-off repeatedly；Electric heater EH can be used for the device heated；
A.C. contactor K1, for controlling the on-off of electric heater EH.Mainboard can be used for exporting the control signal of control contactor；
And detection signal is received, internal judgment is carried out and exports alarm signal.
Optionally, in the example depicted in figure 1, electric heater is using temperature limiter and fuse-link string on major loop:
1) when working properly, under blower normal operation, (i.e. mainboard exports control contactor K1's to the HEAT of mainboard
Voltage signal) output control signal make contactor K1 be closed, electric heater EH normal power-up work, electric heater temperature is excessively high,
Temperature limiter SAT carries out protected by temperature limitation and effectively disconnects electric heater EH major loop, and keeps fuse-link FUT normal.
Such as: in the case where air-conditioner set operates normally and blower operates normally, there is the reason of protected by temperature limitation, it can
Can be air port be plugged cause to divulge information it is unsmooth caused by electric heater temperature it is excessively high.
2) when non-normal working, blower is not under operating condition, even if the HEAT of mainboard controls signal without output, control is electric
When the contactor K1 contact adhesion of heater, the work of electric heater EH normal power-up, it is effectively disconnected that temperature limiter SAT carries out protected by temperature limitation
Electric heater EH major loop is opened, and is blown fuse-link FUT normally not.
3) can detect whether adhesion protects contactor K1, when non-normal working, blower is not under operating condition, mainboard
HEAT without output control signal, and mainboard EH2 (i.e. the second input interface of mainboard) and EH1 (i.e. mainboard first input
Interface) between have voltage 220V, optocoupler is connected, mainboard chip I/O port detects low level, and mainboard issues contactor adhesion and protects
Protect alarm signal.
Optionally, in the example depicted in figure 1, the on-off that can detect electric heater can determine whether out it is that temperature limiter SAT is protected
Shield or permanent disconnect protect (FUT disconnection):
Draw on the EH1 on a line to mainboard in the temperature limiter of electric heater and fuse-link front end, this line and zero curve N it
An indirect optocoupler, when the HEAT on mainboard has output control signal, the contact closure of contactor K1:
1) when temperature limiter SAT and fuse-link FUT all under normal circumstances, electric heater EH entire circuit normally work,
There are voltage 220V, optocoupler conducting between mainboard EH2 and EH1.
2) when temperature limiter SAT or fuse-link FUT are disconnected, the entire circuit electric heater EH, which disconnects, not to work, mainboard EH2 and
No-voltage is poor between EH1, and optocoupler is not turned on.
3) when temperature limiter SAT is protected, after protected by temperature limitation, the sharp temperature drop of electric heater, when temperature limiter SAT temperature
Degree drop to its can recovery temperature, temperature limiter SAT restores closure, therefore disconnected in temperature limiter SAT between the EH2 and EH1 on mainboard
It detects no-voltage difference optocoupler when opening to be not turned on, when temperature limiter SAT restores to be closed, detection has the conducting of voltage difference optocoupler；Therefore optocoupler has
When conducting then temperature limiter SAT is protected when being not turned on sometimes.
4) when fuse-link FUT is protected, fuse-link is irrecoverable, and the major loop of electric heater EH is thoroughly disconnected, mainboard
On EH2 and EH1 between long-time no-voltage it is poor, for optocoupler for a long time when being not turned on, constant temperature and humidity unit not can guarantee constant temperature
It is required that needing that client is reminded to replace fuse-link FUT.
The processing and function realized by the air-conditioner set of the present embodiment essentially correspond to aforementioned device shown in FIG. 1
Embodiment, principle and example, therefore not detailed place in the description of the present embodiment, may refer to mutually speaking on somebody's behalf in previous embodiment
Bright, this will not be repeated here.
Through a large amount of verification experimental verification, using the technical solution of the utility model, by that can detect the on-off of electric heater,
And can determine whether out it is that protected by temperature limitation or permanent disconnect are protected, it realizes user or can check that breakdown judge goes out electric heater after sale
Whether recoverable limit is warm disconnects or permanently disconnects, and conveniently after sale, is also beneficial to promote the reliability and safety of protection.
Embodiment according to the present utility model additionally provides a kind of electric heater of air-conditioner set corresponding to air-conditioner set
Guard method, the flow diagram of an embodiment of the method for the utility model as shown in Figure 4.The electric heater guard method can
To include: step S110 to step S130.
At step S110, by the control switch being arranged between the major loop of the electric heater and the mainboard,
The energization or power-off of the major loop of the electric heater are controlled according to the control signal that mainboard 10 exports.
At step S120, by the mainboard 10 being connect respectively with the control switch and optocoupler 20, opened to the control
It closes and exports the control signal.Alternatively,
At step S130, in the case where the electric heater does not work normally (such as the sky belonging to the electric heater
Unit does not work normally tune, the blower of the air-conditioner set does not operate normally, the mainboard 10 does not export in the control signal
At least one situation under), by the way that optocoupler 20 is arranged, if the mainboard 10 that can be used for exporting the control signal passes through mainboard
10 itself I/O ports, which detect, is connected to the low level that the signal output end of the optocoupler 20 of the mainboard 10 is exported due to conducting
Signal then issues the first prompting message (such as one or more alarm signals of acousto-optic, voice, text of the control switch failure
Number or warning message).Such as: the mainboard 10 can determine that the control switch is according to the feedback signal of the optocoupler 20
No failure, and prompting message or standby signal are initiated in the case where the control switch failure.
Wherein, the first signal input part of the optocoupler 20 is connected to the first input interface (such as mainboard of the mainboard 10
10 input interface EH1), the second signal input terminal of the optocoupler 20 is connected to the second input interface of the mainboard 10 (such as
The input interface EH2 of mainboard 10), the signal output end of the optocoupler 20 is connected to the I/O port of the mainboard 10.
Such as: mainboard can be used for exporting the control signal of control contactor；And detection signal is received, it carries out internal
Judge and exports alarm signal.
Such as: when working properly, under blower normal operation, (i.e. mainboard exports control contactor to the HEAT of mainboard
The voltage signal of K1) output control signal make contactor K1 be closed, electric heater EH normal power-up work, electric heater temperature mistake
Height, temperature limiter SAT carries out protected by temperature limitation and effectively disconnects electric heater EH major loop, and keeps fuse-link FUT normal.
Such as: when non-normal working, blower under operating condition, even if the HEAT of mainboard controls signal without output, is not controlled
When the contactor K1 contact adhesion of electric heater processed, the work of electric heater EH normal power-up, temperature limiter SAT, which carries out protected by temperature limitation, to be had
Effect disconnects electric heater EH major loop, and is blown fuse-link FUT normally not.
Such as: can detect whether adhesion protects contactor K1, when non-normal working, blower is under operating condition,
The HEAT of mainboard controls signal, and the EH2 (i.e. the second input interface of mainboard) of mainboard and EH1 (i.e. the first of mainboard without output
Input interface) between have voltage 220V, optocoupler is connected, mainboard chip I/O port detects low level, and it is viscous that mainboard issues contactor
Even protection alarm signal.
As a result, by the way that fuse and temperature limiter to be serially connected in the major loop of electric heater, and optocoupler is set at mainboard,
Control switch failure is determined if detecting optocoupler conducting in the case where electric heater does not work normally, improves electric heater
The reliability and safety of protection.
It can also include: the process for detecting the on-off of electric heater in an optional embodiment.
Detect that an embodiment process of the on-off of electric heater is shown in method below with reference to the utility model shown in Fig. 5
It is intended to, further illustrates the detailed process for detecting the on-off of electric heater, may include: step S210 to step S230.
Step S210 makes the optocoupler 20 be additionally coupled to the both ends of the electric heater.Such as: by the electric heating
The first connecting pin (the i.e. described electric heater is close to one end of the temperature limiter) of the electric heater and institute on the major loop of device
It states and first connecting line 30 is set between first input interface of mainboard 10, and is described on the major loop of the electric heater
The second connection end (the i.e. described electric heater is close to one end of the control switch) of electric heater and the second of the mainboard 10
Second connecting line 40 is set between input interface.And
Step S220, if detecting that the signal output end of the optocoupler 20 is connected by the I/O port of mainboard 10 itself, really
The major loop of the fixed electric heater works normally.Alternatively,
Step S230, if detecting that the signal output end of the optocoupler 20 does not turn on (such as by the I/O port of mainboard 10 itself
The high level signal exported due to not turning on), it is determined that the fuse and/or the temperature limiter disconnect.
Such as: draw on the EH1 on a line to mainboard in the temperature limiter of electric heater and fuse-link front end, this line and zero
An indirect optocoupler of line N, when the HEAT on mainboard has output control signal, the contact closure of contactor K1 can be detected
The on-off of electric heater can determine whether out it is that temperature limiter SAT protection or permanent disconnect protect (FUT disconnection).
Such as: when temperature limiter SAT and fuse-link FUT all under normal circumstances, the entire circuit normally work of electric heater EH
Make, there is voltage 220V, optocoupler conducting between mainboard EH2 and EH1.
Such as: when temperature limiter SAT or fuse-link FUT is disconnected, the entire circuit electric heater EH, which disconnects, not to work, mainboard EH2
No-voltage is poor between EH1, and optocoupler is not turned on.
Such as: when temperature limiter SAT protection, after protected by temperature limitation, the sharp temperature drop of electric heater works as temperature limiter
SAT temperature drop to its can recovery temperature, temperature limiter SAT restores closure, therefore in temperature limiter between the EH2 and EH1 on mainboard
Detection no-voltage difference optocoupler is not turned on when SAT is disconnected, and when temperature limiter SAT restores to be closed, detection has the conducting of voltage difference optocoupler.
As a result, by detect optocoupler conducting then determine electric heater major loop it is normal, detecting optocoupler disconnect
Then determine that the major loop of electric heater disconnects, detection structure is simple and detection mode is convenient, enriches the protection to electric heater
Function also improves the reliability to electric heater protection.
Optionally, determine that the fuse and/or the temperature limiter disconnect by the mainboard 10 in step S230, it can be with
If including: that the duration that does not turn on of the optocoupler is greater than setting duration, it is determined that the fuse disconnects, and initiates described molten
Second prompting message of interrupter opening；Alternatively, if the duration that the optocoupler does not turn on is less than or equal to setting duration, really
The fixed temperature limiter disconnects and the fuse does not disconnect.
Such as: it can also effectively detect whether electric heater disconnects, can infer whether fuse-link disconnects according to length of time,
Report failure.As can detect the on-off of electric heater, can determine whether out be protected by temperature limitation or it is permanent disconnect protection, realize user or
It can check that breakdown judge goes out warm disconnect of the whether recoverable limit of electric heater and still permanently disconnects after sale, conveniently after sale.
Such as: then temperature limiter SAT protection when being not turned on sometimes is connected in optocoupler sometimes.
Such as: when fuse-link FUT is protected, fuse-link is irrecoverable, and the major loop of electric heater EH is thoroughly disconnected, main
Long-time no-voltage is poor between EH2 and EH1 on plate, and when optocoupler is not turned on for a long time, constant temperature and humidity unit not can guarantee constant temperature
Requirement, need to remind client to replace fuse-link FUT.
It is by the duration judgement not turned in the case where determining that the major loop of electric heater is disconnected according to optocoupler as a result,
Fuse disconnects or temperature limiter disconnects, so that the prompting message that fuse disconnects is initiated in the case where fuse disconnects, with
It is safeguarded in time convenient for user, be conducive to promote maintenance effects and restore the timeliness and reliability of electric heater work, to mention
Rise user experience.
It can also include: to be carried out by fuse to the major loop of the electric heater in an optional embodiment
The first overheat protector based on the first set temperature, and first overheat protector is irrecoverable；It, can be with and/or by temperature limiter
The second overheat protector based on the second set temperature, and second overheat protector are carried out for the major loop to the electric heater
It can restore.Second set temperature is less than first set temperature.
Such as: fuse-link FUT once fuses irrecoverable as overheating protection.Temperature limiter SAT, as overheating protection,
It can restore, it can on-off repeatedly.
As a result, by the way that fuse and temperature limiter to be serially connected in the major loop of electric heater, and fuse is close to electric heating
The AC power source of device is arranged, and can promote the safety of overheat protector, thus be conducive to the protection reliability of lifting electrical heating device,
It is also beneficial to extend the service life of electric heater.
The processing and function realized by the method for the present embodiment essentially correspond to the embodiment of aforementioned air-conditioner set, original
Reason and example, therefore not detailed place in the description of the present embodiment, may refer to the related description in previous embodiment, do not do herein
It repeats.
Through a large amount of verification experimental verification, using the technical solution of the present embodiment, by that can pass through when contacts of contactor adhesion
The major loop of protected by temperature limitation disconnection electric heater；It can also effectively detect whether electric heater disconnects, can be pushed away according to length of time
Whether disconnected fuse-link disconnects and reports failure, improves the reliability and safety of electric heater protection, is also beneficial to extend electric add
The service life of hot device.
To sum up, it will be readily appreciated by those skilled in the art that under the premise of not conflicting, above-mentioned each advantageous manner can be certainly
It combined, be superimposed by ground.
The above description is only the embodiments of the present invention, is not intended to limit the utility model, for this field
Technical staff for, various modifications and changes may be made to the present invention.Within the spirit and principle of the utility model,
Any modification, equivalent replacement, improvement and so on should be included within the scope of the claims of the utility model.
Claims (8)
1. a kind of electric heater protective device characterized by comprising fuse, temperature limiter, control switch, mainboard (10) and
Optocoupler (20)；The fuse and the temperature limiter, are arranged on the major loop of the electric heater；Wherein,
The control switch, the control signal for being exported according to the mainboard (10) control the major loop of the electric heater
It is powered or powers off；
First signal input part of the optocoupler (20) is connected to the first input interface of the mainboard (10), the optocoupler (20)
Second signal input terminal be connected to the second input interface of the mainboard (10), the signal output end connection of the optocoupler (20)
To the I/O port of the mainboard (10)；
The mainboard (10), connect with the control switch and the optocoupler (20) respectively, for exporting to the control switch
The control signal；Alternatively, in the case where the electric heater does not work normally, if detecting the optocoupler (20) due to leading
Logical and output low level signal, then issue the first prompting message of the control switch failure.
2. the apparatus according to claim 1, which is characterized in that further include: the first connecting line (30) and the second connecting line
(40)；Wherein,
The first input of the first connecting pin and the mainboard (10) of the electric heater is arranged in first connecting line (30)
Between interface；
The second connection end of the electric heater and second input of the mainboard (10) is arranged in second connecting line (40)
Between interface；
The mainboard (10), if being also used to detect, the optocoupler (20) are connected, it is determined that the major loop of the electric heater is just
Often work；If detecting, the optocoupler (20) is not turned on, it is determined that the fuse and/or the temperature limiter disconnect.
3. the apparatus of claim 2, which is characterized in that the mainboard (10) determines the fuse and/or described
Temperature limiter disconnects, comprising:
If the duration that the optocoupler does not turn on is greater than setting duration, it is determined that the fuse disconnects, and initiates described molten
Second prompting message of interrupter opening；Alternatively,
If the duration that the optocoupler does not turn on is less than or equal to setting duration, it is determined that the temperature limiter disconnects and described
Fuse does not disconnect.
4. device described in one of -3 according to claim 1, which is characterized in that the fuse and the temperature limiter are arranged at
On the firewire of the AC power source of the electric heater, and temperature limiter setting the fuse and the electric heater it
Between；Wherein,
The fuse carries out the first overheat protector based on the first set temperature for the major loop to the electric heater；
And/or
The temperature limiter carries out the second overheat protector based on the second set temperature for the major loop to the electric heater；
Second set temperature is less than first set temperature.
5. device described in one of -3 according to claim 1, which is characterized in that the control switch, comprising: A.C. contactor；
The normally opened contact of the A.C. contactor is arranged on the major loop of the electric heater；The electricity of the A.C. contactor
Magnetic coil is arranged between the AC power source of the mainboard (10) and the control signal output interface of the mainboard (10).
6. device according to claim 5, which is characterized in that the control switch failure, comprising: the A.C. contactor
Normally opened contact adhesion.
7. device described in one of -3 according to claim 1, which is characterized in that the optocoupler (20) is arranged in the mainboard
(10) on.
8. a kind of air-conditioner set characterized by comprising electric heater protective device as claimed in claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821614197.8U CN208806600U (en) | 2018-09-30 | 2018-09-30 | A kind of electric heater protective device and air-conditioner set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821614197.8U CN208806600U (en) | 2018-09-30 | 2018-09-30 | A kind of electric heater protective device and air-conditioner set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208806600U true CN208806600U (en) | 2019-04-30 |
Family
ID=66237655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821614197.8U Withdrawn - After Issue CN208806600U (en) | 2018-09-30 | 2018-09-30 | A kind of electric heater protective device and air-conditioner set |
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| Country | Link |
|---|---|
| CN (1) | CN208806600U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109386961A (en) * | 2018-09-30 | 2019-02-26 | 珠海格力电器股份有限公司 | A kind of electric heater protective device, air-conditioner set and its electric heater guard method |
-
2018
- 2018-09-30 CN CN201821614197.8U patent/CN208806600U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109386961A (en) * | 2018-09-30 | 2019-02-26 | 珠海格力电器股份有限公司 | A kind of electric heater protective device, air-conditioner set and its electric heater guard method |
| CN109386961B (en) * | 2018-09-30 | 2023-06-30 | 珠海格力电器股份有限公司 | Electric heater protection device, air conditioning unit and electric heater protection method of air conditioning unit |
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