CN206673574U - Dryer electrostatic discharge protective circuit and dryer - Google Patents
Dryer electrostatic discharge protective circuit and dryer Download PDFInfo
- Publication number
- CN206673574U CN206673574U CN201720298109.7U CN201720298109U CN206673574U CN 206673574 U CN206673574 U CN 206673574U CN 201720298109 U CN201720298109 U CN 201720298109U CN 206673574 U CN206673574 U CN 206673574U
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- China
- Prior art keywords
- dryer
- transient voltage
- electrostatic
- voltage suppressor
- bonding jumper
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Abstract
The utility model belongs to electrostatic process field; disclose a kind of dryer electrostatic discharge protective circuit and dryer; the dryer electrostatic discharge protective circuit includes two bonding jumpers being arranged in drum for clothes drier; each bonding jumper is in series with transient voltage suppressor; transient voltage suppressor is unidirectional transient voltage suppressor; and its negative electrode is connected to bonding jumper, plus earth is set, for the electrostatic on bonding jumper to be directed into ground.Dryer of the present utility model includes above-mentioned dryer electrostatic discharge protective circuit.Pass through the unidirectional transient voltage suppressor for ground connection that bonding jumper is connected, on the one hand the electrostatic on bonding jumper can be directed into ground, and then avoid damage of the electrostatic of bonding jumper to electrical equipments such as dryer computer boards, on the other hand, in the case where ground wire electrification, machine shell are powered, unidirectional transient voltage suppressor also can prevent power supply clutter to be directly transferred to by wire on computer board, avoid the serious distortion of data acquisition.
Description
Technical field
It the utility model is related to electrostatic process field, more particularly to a kind of dryer electrostatic discharge protective circuit and drying
Machine.
Background technology
Existing dryer mostly detects clothing electrical conductivity to realize that the automatic drying of clothing judges using bimetal strip, and it is led
If it is made up of the humidity collection circuit of two bonding jumpers on roll supporting part, connecting wire and computer board.This set system
By gathering the electrical conductivity between bimetal strip, computer board correlated sampling circuit is updated to, clothing is then judged by software calculating
The dry and wet degree of thing.This requires that sample circuit is reliable and stable, related device accuracy is high.
But because the bimetal strip of this dryer directly contacts clothing, when clothing is relatively dry, especially
Contain chemical fibre clothes in drying clothing, be just easy to produce electrostatic, electrostatic is sometimes up to more than ten kilovolts.Electrostatic passes through metal
Bar, connecting wire are transmitted on computer board, can be produced harmful effect to the appliance component on computer board, will so be broken for a long time
Bad electronic circuit, long-term operating can damage delicate electronic device, have influence on the collection of laundry humidity, judge, or even lose automatic
Drying function.
For the situation of above-mentioned bimetal strip conducting static electricity, intuitively idea is exactly to be connected to the bonding jumper for detecting humidity
Machine casing (ground connection), electrostatic are conducted by earthing of casing line, and so caused electrostatic would not be transmitted on computer board,
Appliance component on computer board would not be had an impact, ensure that data are accurately gathered, judged.But bonding jumper is directly connect
To machine casing, in the case where ground wire electrification, machine shell are powered, power supply clutter will be directly transferred to computer by wire
On plate, data acquisition serious distortion is caused.
Utility model content
The purpose of this utility model is to provide a kind of dryer electrostatic discharge protective circuit and dryer, to solve existing drying
Electrostatic causes to easily cause computer board data acquisition serious distortion when damage and metal strips for grounding to computer board on machine bonding jumper
The problem of.
To use following technical scheme up to this purpose, the utility model：
A kind of dryer electrostatic discharge protective circuit, including two bonding jumpers being arranged in drum for clothes drier, each bonding jumper
Transient voltage suppressor is in series with, the transient voltage suppressor is unidirectional transient voltage suppressor, and
Its negative electrode is connected to the bonding jumper, and plus earth is set, for the electrostatic on bonding jumper to be directed into ground.
Preferably, each transient voltage suppressor is parallel with electric capacity, the electric capacity is used to store metal
The electrostatic of bar transmission.
Preferably, the transient voltage suppressor is 400V-600V unidirectional transient voltage suppressor.
Preferably, the ground connection that the anode of the unidirectional transient voltage suppressor is connected to the dryer shell is led
Line.
Preferably, the anode of two unidirectional transient voltage suppressors is all connected to the ground connection of a dryer shell
Wire.
Preferably, the bonding jumper is arranged in the support member in drum for clothes drier.
The utility model also provides a kind of dryer, including above-mentioned dryer electrostatic discharge protective circuit.
The beneficial effects of the utility model：The unidirectional transient voltage suppressor being grounded by the way that bonding jumper is connected, one
Electrostatic on bonding jumper can be directed into ground by aspect, and then the electrostatic for avoiding bonding jumper is electric to dryer computer board etc.
The damage of element, on the other hand, in the case where ground wire electrification, machine shell are powered, unidirectional transient voltage suppressor
Also power supply clutter can be prevented to be directly transferred to by wire on computer board, avoids the serious distortion of data acquisition.
By the matched electric capacity in parallel in transient voltage suppressor, transient voltage can be reduced and suppress two poles
The working frequency of pipe, and then extend the service life of transient voltage suppressor.
Brief description of the drawings
Fig. 1 is the circuit diagram of the utility model dryer electrostatic discharge protective circuit.
In figure：
1st, bonding jumper；2nd, transient voltage suppressor；3rd, electric capacity；4th, computer board.
Embodiment
Further illustrate the technical solution of the utility model below in conjunction with the accompanying drawings and by embodiment.
The utility model provides a kind of dryer electrostatic discharge protective circuit, as shown in figure 1, the dryer electrostatic discharge protective circuit bag
Two bonding jumpers 1 being arranged in drum for clothes drier are included, two bonding jumpers 1 are connected to the computer board 4 of dryer, the specific gold
Category bar 1 is arranged in the support member inside drum for clothes drier, and it can be by adopting with the contact with clothing in dryer, dryer
Collect the electrical conductivity between bimetal strip 1, the dry and wet degree of clothing is then judged by software calculating.
In order to realize the discharge of electrostatic on bonding jumper 1, to avoid damage of the electrostatic on the grade electrical equipment of computer board 4 from influenceing,
The above-mentioned each bonding jumper 1 of the present embodiment is in series with transient voltage suppressor 2, specifically, the transient voltage suppresses two poles
Pipe 2 is unidirectional transient voltage suppressor, and its negative electrode is connected to bonding jumper 1, and plus earth is set, for by bonding jumper 1
Electrostatic be directed into ground.In the present embodiment, above-mentioned (the Transient Voltage of transient voltage suppressor 2
Suppressor, also referred to as Transient Voltage Suppressor) abbreviation TVS, it is a kind of high-effect protection device of diode, is had
Document on also referred to as TVP, AJTVS, SAJTVS etc..In normal state, above-mentioned transient voltage suppressor 2 is to above-mentioned gold
It is in high impedance status to belong to the laundry humidity Acquisition Circuit that bar 1 connects, when the two poles of the earth of transient voltage suppressor 2 are by reverse wink
During state high energy impact events, that is, when voltage caused by electrostatic exceedes its breakdown voltage, it can be with 10-12The speed of second-time, will
The high impedance of its two interpolar is changed into Low ESR, and then electrostatic is flowed into ground through the transient voltage suppressor 2, to keep away
Exempt from damage of the electrostatic to the grade electrical equipment of computer board 4, the precision components in electronic circuit can be effectively protected, from electrostatic
Damage.
In the present embodiment, above-mentioned transient voltage suppressor 2 uses unidirectional transient voltage suppressor, i.e. bonding jumper
Electrostatic on 1 is releasably arrived outside dryer shell, and the electrostatic outside dryer shell can not be then conducted to computer board 4.It is above-mentioned
Unidirectional transient voltage suppressor can prevent that, in the case where ground wire electrification, machine shell are powered, power supply clutter is by leading
Line is directly transferred on computer board 4, avoids the serious distortion of data acquisition.In the present embodiment, above-mentioned transient voltage suppresses two
Pole pipe 2 is 400V-600V unidirectional transient voltage suppressor, to improve the service life of transient voltage suppressor 2.
In the present embodiment, it is contemplated that the life-span number of transient voltage suppressor 2 and the antistatic behaviour of computer board 4,
Electric capacity 3 is parallel with each transient voltage suppressor 2, the electric capacity 3 can be used for the electrostatic that storage bonding jumper 1 transmits,
Electrostatic only is stored to after a certain amount of in electric capacity 3, the release electrostatic of electric capacity 3 and by transient voltage suppressor 2, by transient electrical
Constrain diode 2 processed to discharge to ground.In the present embodiment, the selection of above-mentioned electric capacity 3 should be with the phase of transient voltage suppressor 2
Match somebody with somebody, i.e., should select high-voltage capacitance.By the setting of above-mentioned electric capacity 3, can minimizing electrostatic pass through transient voltage suppressor 2
Frequency, it is also just corresponding to reduce the frequency of use of transient voltage suppressor 2, transient voltage suppression is extended in terms of access times
The service life of diode 2.
In the present embodiment, the ground connection that the anode of above-mentioned unidirectional transient voltage suppressor is connected to dryer shell is led
Line, i.e. realization share with dryer earth lead, without additionally setting earth lead.More specifically, the present embodiment
The anode of two unidirectional transient voltage suppressors is all connected to the earth lead of a dryer shell, is manufactured into saving
This.
The utility model also provides a kind of dryer, including above-mentioned dryer electrostatic discharge protective circuit, passes through above-mentioned drying
Machine electrostatic discharge protective circuit, the electrostatic protection of the grade electrical equipment of computer board 4 of dryer can be realized, avoids the quiet of bonding jumper 1
Damage of the electricity to the grade electrical equipment of dryer computer board 4.And in the case that ground wire electrification, machine shell are powered, unidirectional
Transient voltage suppressor 2 also can prevent power supply clutter to be directly transferred to by wire on computer board 4, avoid data acquisition
Serious distortion.
Obviously, above-described embodiment of the present utility model is used for the purpose of clearly illustrating the utility model example, and
It is not the restriction to embodiment of the present utility model.For those of ordinary skill in the field, in described above
On the basis of can also make other changes in different forms.There is no need and unable to give all embodiments
It is exhaustive.All made within spirit of the present utility model and principle all any modification, equivalent and improvement etc., should be included in
Within the protection domain of the utility model claims.
Claims (7)
1. a kind of dryer electrostatic discharge protective circuit, it is characterised in that including two bonding jumpers being arranged in drum for clothes drier
(1), each bonding jumper (1) is in series with transient voltage suppressor (2), and the transient voltage suppressor (2) is single
To transient voltage suppressor, and its negative electrode is connected to the bonding jumper (1), and plus earth is set, for by bonding jumper (1)
On electrostatic be directed into ground.
2. dryer electrostatic discharge protective circuit according to claim 1, it is characterised in that each transient voltage suppresses two
Pole pipe (2) is parallel with electric capacity (3), and the electric capacity (3) is used for the electrostatic for storing bonding jumper (1) transmission.
3. dryer electrostatic discharge protective circuit according to claim 2, it is characterised in that the transient voltage suppressor
(2) the unidirectional transient voltage suppressor for being 400V-600V.
4. dryer electrostatic discharge protective circuit according to claim 3, it is characterised in that the unidirectional transient voltage suppresses two
The anode of pole pipe is connected to the earth lead of the dryer shell.
5. dryer electrostatic discharge protective circuit according to claim 3, it is characterised in that two unidirectional transient voltages suppress two
The anode of pole pipe is all connected to the earth lead of a dryer shell.
6. dryer electrostatic discharge protective circuit according to claim 1, it is characterised in that the bonding jumper (1) is arranged on dry
In support member in clothing machine cylinder.
7. a kind of dryer, it is characterised in that including any described dryer electrostatic discharge protective circuits of claim 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720298109.7U CN206673574U (en) | 2017-03-25 | 2017-03-25 | Dryer electrostatic discharge protective circuit and dryer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720298109.7U CN206673574U (en) | 2017-03-25 | 2017-03-25 | Dryer electrostatic discharge protective circuit and dryer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206673574U true CN206673574U (en) | 2017-11-24 |
Family
ID=60374411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720298109.7U Active CN206673574U (en) | 2017-03-25 | 2017-03-25 | Dryer electrostatic discharge protective circuit and dryer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206673574U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108631285A (en) * | 2017-03-25 | 2018-10-09 | 青岛海尔洗衣机有限公司 | Dryer electrostatic discharge protective circuit and dryer |
-
2017
- 2017-03-25 CN CN201720298109.7U patent/CN206673574U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108631285A (en) * | 2017-03-25 | 2018-10-09 | 青岛海尔洗衣机有限公司 | Dryer electrostatic discharge protective circuit and dryer |
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