CN2591070Y - Straightway discharging water electromagnet for washing machine - Google Patents
Straightway discharging water electromagnet for washing machine Download PDFInfo
- Publication number
- CN2591070Y CN2591070Y CN 02249891 CN02249891U CN2591070Y CN 2591070 Y CN2591070 Y CN 2591070Y CN 02249891 CN02249891 CN 02249891 CN 02249891 U CN02249891 U CN 02249891U CN 2591070 Y CN2591070 Y CN 2591070Y
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- winding
- circuit
- switch
- washing machine
- adhesive
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- Detail Structures Of Washing Machines And Dryers (AREA)
Abstract
The utility model relates to a straight flow water discharging electromagnet for a washing machine, which comprises a skeleton, a yoke, an armature, a break sensitive position switch and a coil, wherein, the break sensitive position switch moves when the armature is attracted, the holding winding of the coil is connected with the switch in parallel and then is connected with an attracting winding in series, and the coil accepts a DC power supply. The utility model is characterized in that the attracting winding is connected with the connection point of the switch, and a spark quenching circuit is between the attracting winding and one pole of the DC power supply in bridge connection. The spark quenching circuit is connected with a semiconductor diode in reverse parallel or is connected with a varistor in parallel along the direction of voltage drop of the DC power supply at both ends of the attracting winding; or both poles of the switch are connected with a capacitor or a circuit in bridge connection, wherein, the circuit is composed of a capacitor and a resistor connected in series. The spark quenching circuit provides a follow current loop for the current of the attracting winding when the switch is off, and the follow current loop can release energy. Consequently, the spark quenching circuit inhibits the over voltage and eliminates the damage to a switch contact and the coil insulation. The improvement has the advantages of low cost and high reliability, and the utility model is particularly suitable for the straight flow water discharging electromagnet of the washing machine which is controlled by a contact circuit.
Description
Technical field
The utility model relates to a kind of washing machine electromagnetic for direct drainage, especially uses the electromagnetic for direct drainage of the washing machine that contact circuit control is arranged.
Background technology
The washing machine electromagnetic for direct drainage has used for many years, recent developments still are found in the light industry standard QB/T2482-2000 of the People's Republic of China (PRC) " electromagnetic for direct drainage " of on June 13rd, 2000 issue and " automatic washing machine principle and maintenance " (Fujian science tech publishing house 2000 January the 1st edition the 27th page).The formation of this electromagnet comprises: skeleton, and the iron yoke, armature, the moving disconnected moving position switch S that declines that moves during the armature adhesive is by adhesive winding L 1 and the coil that keeps winding L 2 to form; Its circuit structure is as shown in Figure 1: after keeping winding L 2 and the moving disconnected moving position switch S parallel connection that declines, connect with adhesive winding L 1 again, accept the dc source that control circuit of the washing machine provides; When this electromagnetic actuation started, the voltage of dc source all was applied on the adhesive winding L 1, forms enough big first absorbing current; Finish when changing hold mode in adhesive action, switch S is pushed to off-state by electromagnet armature, keep winding L 2 access circuits, the voltage of same dc source is applied to adhesive winding L 1 and keeps making electric current be reduced to the maintenance electric current on the series circuit of winding L 2.Keep electric current usually than the little order of magnitude of operating current.
The problem that such electromagnet exists is: described switch S is pushed into when disconnecting, bigger first absorbing current bust is less maintenance electric current in adhesive winding L 1, usually the maintenance winding that can be subjected to by the continuous current circuit that power supply discharges its electromagnetic energy being sealed in intercepts, this transient process produces quite high overvoltage (because inductance is bigger, electromagnetic energy can reach a joule level, voltage can reach a kilovolt level), obvious damage switch contact and coil insulation.Be limited to volume and cost, this electromagnet is not suitable for again prolonging its life-span by the grade that improves switch and coil insulation, just takes place after a period of time malfunctioningly easily so that use, and burns winding, even quality problems such as electrical fire.
Summary of the invention
Technical problem to be solved in the utility model is: a kind of washing machine electromagnetic for direct drainage is provided, and with respect to prior art, its circuit can be avoided superpotential harm when described switch disconnects, and quality can obviously improve and cost is lower.
The technical solution of the utility model is a kind of washing machine electromagnetic for direct drainage, and its formation comprises: skeleton, iron yoke, armature, moving disconnected moving position switch and the coil of declining that moves during the armature adhesive; Coil is by the adhesive winding and keep winding to form; After keeping winding and described switch in parallel, with the adhesive windings in series, accept the dc source that control circuit of the washing machine provides again; It is characterized in that: described adhesive winding connects the tie point of described switch, and cross-over connection one flame-out flower circuit between the utmost point of described dc source.
Flame-out flower circuit is generally non-linear element or the energy exchange element that moves when changing the road in the prior art.Described flame-out colored circuit is after electromagnet is accepted power supply and before described switch disconnects, do not influence adhesive winding work in parallel; When described switch disconnects, flame-out flower circuit directly or the described dc source of connecting for the electric current of adhesive winding provides the continuous current circuit that discharges its energy, thereby suppresses overvoltage, elimination solves the relevant quality problems of prior art electromagnet to the infringement of switch contact and winding insulation.
One of further design of the technical solution of the utility model is that described flame-out colored circuit is at the direction of described adhesive winding two ends along described dc source voltage landing, semiconductor diode oppositely in parallel.After electromagnet is accepted power supply and before the disconnection of described switch, therefore the electric current of dc source can not influence its adhesive winding work in parallel by this semiconductor diode that is connected with its reversed polarity; When described switch disconnected, the induced voltage that produces on the adhesive winding was that supply voltage is oppositely, and described semiconductor diode thereby conducting are for the electric current of adhesive winding provides the continuous current circuit that discharges its energy.The semiconductor diode conducting voltage is very low, can suppress overvoltage and approach zero.
Two of the further design of the technical solution of the utility model is that described flame-out colored circuit is in described adhesive winding two an ends piezo-resistance in parallel.The piezo-resistance conventional design selects its breakdown voltage to be higher than the maximum of the voltage of described dc source.After electromagnet is accepted power supply and before the disconnection of described switch, the electric current of dc source can not pass through this piezo-resistance, does not therefore influence its adhesive winding work in parallel; When described switch disconnected, the induced voltage that produces on the adhesive winding was higher than dc source voltage, and the piezo-resistance conducting is for the electric current of adhesive winding provides the continuous current circuit that discharges its energy.This circuit need not to consider the polar relationship of element and power supply when connecting, but overvoltage need suppress the maximum for the voltage that is higher than described dc source.
Three of the further design of the technical solution of the utility model is, described flame-out colored circuit is two utmost points at described switch, cross-over connection one capacitor, or the connect circuit of a resistor of a capacitor.After electromagnet is accepted power supply and before the disconnection of described switch, therefore the capacitor of this cross-over connection is not influenced the work of adhesive winding by described switch short circuit; When described switch disconnected, the induced voltage stack dc source voltage that the adhesive winding produces charged to capacitor, and the continuous current circuit of its energy of release is provided for the electric current of adhesive winding.
Compare with the way of winding insulation grade with improving switch, the flame-out colored circuit volume of electronic components such as use semiconductor diode is little, low price and reliable.For use the washing machine of contact circuit control is arranged and since do not have can by electronic controller with suitable control mode the structure of prior art electromagnet is improved, technical solutions of the utility model are especially suitable.
Description of drawings
The following drawings is used to illustrate embodiment of the present utility model:
Fig. 1 is a prior art washing machine electromagnetic for direct drainage circuit diagram.
Fig. 2 is the utility model the 1st embodiment washing machine electromagnetic for direct drainage circuit diagram.
Fig. 3 is the utility model the 2nd embodiment washing machine electromagnetic for direct drainage circuit diagram.
Fig. 4 is the utility model the 3rd embodiment washing machine electromagnetic for direct drainage circuit diagram.
The specific embodiment
Prior art washing machine electromagnetic for direct drainage, its formation comprises: skeleton, the iron yoke, armature moves position switch S by moving disconnected the declining that the armature adhesive promotes, by adhesive winding L 1 and the coil that keeps winding L 2 to form.As shown in Figure 1: after keeping winding L 2 and the moving disconnected moving position switch S parallel connection that declines, electromagnetic for direct drainage 14 circuit that are composed in series with adhesive winding L 1 are again accepted the dc source voltage that the AC power 11 of washing machine controller control provides through full-wave rectification bridge V2.When this electromagnetic actuation started, dc source voltage all was applied to the enough big first absorbing current of formation on the adhesive winding L 1; Finish when changing hold mode in adhesive action, switch S is pushed to off-state by electromagnet armature, keep winding L 2 access circuits, same dc source voltage is applied to adhesive winding L 1 and keeps making electric current be reduced to the maintenance electric current on the series circuit of winding L 2.
The utility model embodiment can improve on the basis of prior art washing machine electromagnetic for direct drainage 14 circuit and form, and its circuit diagram is seen Fig. 2, Fig. 3 and Fig. 4.
Circuit such as Fig. 2 of the utility model the 1st embodiment washing machine electromagnetic for direct drainage 14.The difference of itself and Fig. 1 only is two ends of adhesive winding L 1, along the direction of supply voltage landing, and semiconductor diode D oppositely in parallel.For example among Fig. 2, circuit design is the positive output end that an end of adhesive winding L 1 connects described full-wave rectification bridge V2, and then the negative electrode of semiconductor diode D is connected with this end of adhesive winding L 1, and its anode is connected with the other end of adhesive winding L 1.
The rated value of semiconductor diode D can stop working according to the prior art electric contact and spend circuit design: its breakdown reverse voltage needs the maximum greater than dc source voltage, when for example the control circuit of the washing machine of rated voltage 220V provides this dc source with full-wave rectification bridge, the about 310V of the maximum of this voltage, the breakdown reverse voltage that can choose semiconductor diode D is 400V～600V; Its forward current needs can be chosen for 4A～6A usually greater than the dc resistance of dc source voltage divided by adhesive winding L 1.Can consider to choose its suitable maximum operating frequency in addition,, help the overvoltage that prevents that contingent vibration causes in the transient process to improve response.Semiconductor diode D can also connect in parallel with two ends of adhesive winding L 1 again behind the resistance of a suitable resistance, to adjust transient process.
Circuit such as Fig. 3 of the utility model the 2nd embodiment washing machine electromagnetic for direct drainage 14.The difference of itself and Fig. 1 only is the two ends piezo-resistance R in parallel of adhesive winding L 1.Piezo-resistance R often selects the zinc oxide type for use, and choosing of its rated value can be with reference to the 1st embodiment.This piezo-resistance R in parallel also can replace with two Zener diodes of differential concatenation, reaches similar functions.When the inductive current energy was big especially, present embodiment can also be in conjunction with the 1st embodiment, and semiconductor diode promptly in parallel is again strengthened superpotential inhibition ability.
Circuit such as Fig. 4 of the utility model the 3rd embodiment washing machine electromagnetic for direct drainage 14.The difference of itself and Fig. 1 only is two end shnt capacitor C of switch S.Its capacity can be the capacitor of 0.1 microfarad～1 microfarad range, is generally electrolytic capacitor; Choosing of its rated voltage can be with reference to the 1st embodiment.Capacitor C can also connect in parallel with two ends of switch S again behind the resistance.This resistance helps containing the impact and the contingent vibration of charging and discharging currents.
The volume of semiconductor diode D, piezo-resistance R and capacitor C is little, can be encapsulated in the coil.At this moment, its rated value can be considered the suitably adjustment of influence do of coil heating.
Claims (4)
1, a kind of washing machine electromagnetic for direct drainage, its formation comprises: skeleton, iron yoke, armature, moving disconnected moving position switch and the coil of declining that moves during the armature adhesive; Coil is by the adhesive winding and keep winding to form; After keeping winding and described switch in parallel, with the adhesive windings in series, accept the dc source that control circuit of the washing machine provides again; It is characterized in that: described adhesive winding connects the tie point of described switch, and cross-over connection one flame-out flower circuit between the utmost point of described dc source.
2, according to the described washing machine electromagnetic for direct drainage of claim 1, it is characterized in that: described flame-out colored circuit is at the direction of described adhesive winding two ends along described dc source voltage landing, semiconductor diode oppositely in parallel.
3, according to the described washing machine electromagnetic for direct drainage of claim 1, it is characterized in that: described flame-out colored circuit is in described adhesive winding two an ends piezo-resistance in parallel.
4, according to the described washing machine electromagnetic for direct drainage of claim 1, it is characterized in that: described flame-out colored circuit is two utmost points at described switch, cross-over connection one capacitor, or the connect circuit of a resistor of a capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02249891 CN2591070Y (en) | 2002-11-29 | 2002-11-29 | Straightway discharging water electromagnet for washing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02249891 CN2591070Y (en) | 2002-11-29 | 2002-11-29 | Straightway discharging water electromagnet for washing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2591070Y true CN2591070Y (en) | 2003-12-10 |
Family
ID=33720231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02249891 Expired - Lifetime CN2591070Y (en) | 2002-11-29 | 2002-11-29 | Straightway discharging water electromagnet for washing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2591070Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104715883A (en) * | 2015-03-09 | 2015-06-17 | 天津津滨高铁电气装备科技有限公司 | Energy-saving type continuous duty locomotive door control electromagnet |
-
2002
- 2002-11-29 CN CN 02249891 patent/CN2591070Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104715883A (en) * | 2015-03-09 | 2015-06-17 | 天津津滨高铁电气装备科技有限公司 | Energy-saving type continuous duty locomotive door control electromagnet |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20121129 Granted publication date: 20031210 |