CN210725432U - Anti-induction circuit of operating column indicator lamp - Google Patents
Anti-induction circuit of operating column indicator lamp Download PDFInfo
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- CN210725432U CN210725432U CN201921148134.2U CN201921148134U CN210725432U CN 210725432 U CN210725432 U CN 210725432U CN 201921148134 U CN201921148134 U CN 201921148134U CN 210725432 U CN210725432 U CN 210725432U
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Abstract
The utility model provides an anti induction circuit of operation post pilot lamp, include: an operating circuit; the control circuit is connected with the operating circuit in parallel and is provided with an intermediate relay coil; the first operation circuit is connected with the operation circuit in parallel, and is provided with a first operation indicator light and two intermediate relay normally-open auxiliary contacts which are connected in series in front of and behind the first operation indicator light; the first stop circuit is arranged in parallel with the operating circuit, the first stop circuit is provided with a first stop indicator lamp and two intermediate relay normally-closed auxiliary contacts which are connected in series in front of and behind the first stop indicator lamp, the operating circuit receives a power-on instruction to enable an intermediate relay coil of the control circuit to be powered on, so that the two intermediate relay normally-open auxiliary contacts are closed, the two intermediate relay normally-closed auxiliary contacts are opened, the first operating indicator lamp is turned on, and the first stop indicator lamp is turned off. The problem of there is the erroneous judgement in operation post pilot lamp among the prior art has been solved to this application.
Description
Technical Field
The utility model relates to an electrical equipment and electrical engineering technical field particularly, relate to an anti induction circuit of operation post pilot lamp.
Background
At present, 2011 the postproduction used novel 120 tons/year ethylene plant's electrical equipment is many later, and the cable is arranged closely, and there is induced voltage at on-the-spot motor operation post pilot lamp, no matter whether the motor is at the running state, the pilot lamp all can have the luminance of different degrees, and operating personnel judges the instruction from the operation post that can not be simple to the differentiation of the running state of motor, has influenced the normal clear of production, and when misjudging, the maloperation can appear even.
That is to say, there is the problem of erroneous judgement in the operation post pilot lamp among the prior art.
SUMMERY OF THE UTILITY MODEL
A primary object of the utility model is to provide an anti induction circuit of operation post pilot lamp to there is the problem of erroneous judgement in the operation post pilot lamp among the solution prior art.
In order to achieve the above object, according to an aspect of the present invention, there is provided an operation column indicator lamp anti-induction circuit, including: an operating circuit; a control circuit disposed in parallel with the operating circuit and having an intermediate relay coil; the first operating circuit is connected with the operating circuit in parallel and is provided with a first operating indicator light and two normally open auxiliary contacts of an intermediate relay connected in series in front of and behind the first operating indicator light; the first stop circuit is arranged in parallel with the operating circuit, the first stop circuit is provided with a first stop indicator lamp and two intermediate relay normally closed auxiliary contacts which are connected in series in front of and behind the first stop indicator lamp, the operating circuit receives an electrifying instruction to electrify an intermediate relay coil of the control circuit, two intermediate relay normally open auxiliary contacts of the first operating circuit are closed, two intermediate relay normally closed auxiliary contacts of the first stop circuit are opened, the first operating indicator lamp is turned on, and the first stop indicator lamp is turned off.
Furthermore, the first stop circuit is also provided with at least one second stop indicator lamp, and each second stop indicator lamp is connected with the first stop indicator lamp in parallel.
Further, the operating circuit includes a contactor coil; the control circuit further comprises a contactor normally-open auxiliary contact connected with the intermediate relay coil in series, and the contactor coil is electrified to close the contactor normally-open auxiliary contact so that the intermediate relay coil is electrified.
Further, the operating circuit further comprises a second operation indicator lamp, and the second operation indicator lamp is connected with the contactor coil in parallel.
Further, the operation circuit further includes: the remote operation circuit and the field operation circuit are connected in parallel and then are connected with the contactor coil in series; and the change-over switch controls the switching of the remote operation circuit and the field operation circuit.
Further, the operating circuit further comprises a normally open switch, and the normally open switch is connected with the remote operating circuit and the field operating circuit in parallel.
Furthermore, the operation post pilot lamp anti-induction circuit also comprises a grounding protection circuit, and the grounding protection circuit is connected with the operation circuit in parallel.
Furthermore, the operating column indicator light anti-induction circuit further comprises a motor protection circuit, the motor protection circuit comprises a microcomputer motor protection device and a micro-break switch, the micro-break switch is connected with the microcomputer motor protection device in series, and the micro-break switch controls the power-on state of the microcomputer motor protection device.
Further, the first stop indicator light is a green light; and/or the first running indicator light is a red light.
Further, the operating circuit further comprises a meter stop switch connected in series with the remote operating circuit and the field operating circuit.
By applying the technical scheme of the utility model, the anti-induction circuit of operation post pilot lamp includes operating circuit, control circuit, first operation circuit and first stop circuit, control circuit and operating circuit parallel arrangement, and control circuit has the auxiliary relay coil, first operation circuit and operating circuit parallel arrangement, first operation circuit has first operation pilot lamp and two auxiliary relay normally open contacts that establish ties around first operation pilot lamp, first stop circuit and operating circuit parallel arrangement, first stop circuit has first stop pilot lamp and two auxiliary relay normally closed contacts that establish ties around first stop pilot lamp, wherein, operating circuit receives the circular telegram order, so that the auxiliary relay coil of control circuit circular telegram, make two auxiliary relay normally open contacts of first operation circuit closed, two auxiliary relay normally closed contacts of first stop circuit open, the first operation indicator lamp is turned on, and the first stop indicator lamp is turned off.
The intermediate relay coil, the intermediate relay normally-open auxiliary contact and the intermediate relay normally-closed auxiliary contact are arranged in the anti-induction circuit of the operating column indicating lamp, so that the intermediate relay coil can simultaneously control the opening and closing of the intermediate relay normally-open auxiliary contact and the intermediate relay normally-closed auxiliary contact. After the intermediate relay coil circular telegram, two intermediate relay normally open auxiliary contact closed to make first operation pilot lamp circular telegram operation, with suggestion staff's equipment is operating work, meanwhile, two intermediate relay normally closed auxiliary contact disconnection, so that first stop indicator lamp outage no longer gives staff's suggestion. After the intermediate relay coil cuts off the power supply, two intermediate relays normally open auxiliary contact disconnection to make first operation pilot lamp outage, and no longer give the staff suggestion, with this while two intermediate relay normally closed auxiliary contact closure, so that first stop indicator lamp circular telegram operation, with suggestion staff's equipment operation work that does not operate. Because an auxiliary contact is normally opened to the auxiliary relay that respectively establishes ties around first operation pilot lamp, two auxiliary contacts are normally opened to the auxiliary relay and the circuit of first operation pilot lamp is whole to be cut off, has just so cut off the response circuit of first operation pilot lamp to reach the effect of eliminating induced voltage, increased the accuracy that first operation pilot lamp instructed. In a similar way, the induction line of the first stop indicator lamp is cut off, and the indicating accuracy of the first stop indicator lamp is improved. The problem of misjudgment of the first running indicator lamp and the first stop indicator lamp is reduced, and the safety of manual operation is improved.
Drawings
The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 shows an anti-induction circuit diagram of an operation column indicator light according to an alternative embodiment of the present invention.
Wherein the figures include the following reference numerals:
1. an operating circuit; 2. a control circuit; 3. a first operation circuit; 4. a first stop circuit; 10. an intermediate relay coil; 20. a first operation indicator light; 30. the normally open auxiliary contact of the intermediate relay; 40. a first stop indicator light; 50. normally closing an auxiliary contact of the intermediate relay; 60. a second stop indicator light; 70. a contactor coil; 80. a normally open auxiliary contact of the contactor; 90. a second running indicator light; 100. a transfer switch; 110. a normally open switch; 120. a ground protection circuit; 130. a microcomputer motor protection device; 140. a micro-break switch; 150. an instrument stop switch; 160. a remote operation circuit; 170. a field operation circuit; 180. the tripping relay of the microcomputer motor protection device outputs a normally closed node; 190. the trip relay of the microcomputer motor protection device outputs a first normally open node; 200. the trip relay of the microcomputer motor protection device outputs a second normally open node; 210. operating the column on site; 220. a field operation stop switch; 230. operating a starting switch on site; 250. an instrument start switch; 260. a circuit breaker; 270. and (4) switching.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
In the present application, where the contrary is not intended, the use of directional words such as "upper, lower, top and bottom" is generally with respect to the orientation shown in the drawings, or with respect to the component itself in the vertical, perpendicular or gravitational direction; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the invention.
In order to solve the problem that there is the erroneous judgement in the operation post pilot lamp among the prior art, the utility model provides an anti induction circuit of operation post pilot lamp.
As shown in FIG. 1, the column indicator anti-induction circuit comprises an operation circuit 1, a control circuit 2, a first operation circuit 3 and a first stop circuit 4, wherein the control circuit 2 is arranged in parallel with the operation circuit 1, the control circuit 2 is provided with an intermediate relay coil 10, the first operation circuit 3 is arranged in parallel with the operation circuit 1, the first operation circuit 3 is provided with a first operation indicator lamp 20 and two intermediate relay normally-open auxiliary contacts 30 connected in series in front of and behind the first operation indicator lamp 20, the first stop circuit 4 is arranged in parallel with the operation circuit 1, the first stop circuit 4 is provided with a first stop indicator lamp 40 and two intermediate relay normally-closed auxiliary contacts 50 connected in series in front of and behind the first stop indicator lamp 40, and the operation circuit 1 receives an electrifying instruction to electrify the intermediate relay coil 10 of the control circuit 2 to close the two intermediate relay normally-closed auxiliary contacts 30 of the first operation circuit 3, The two intermediate relay normally-closed auxiliary contacts 50 of the first stop circuit 4 are opened, the first running indicator lamp 20 is turned on, and the first stop indicator lamp 40 is turned off.
By arranging the intermediate relay coil 10, the intermediate relay normally-open auxiliary contact 30 and the intermediate relay normally-closed auxiliary contact 50 in the operating column indicator light anti-induction circuit, the intermediate relay coil 10 can simultaneously control the opening and closing of the intermediate relay normally-open auxiliary contact 30 and the intermediate relay normally-closed auxiliary contact 50. After the intermediate relay coil 10 is energized, the two intermediate relay normally open auxiliary contacts 30 are closed to energize the first operation indicating lamp 20 to operate to indicate to the staff that the equipment is operating, and at the same time, the two intermediate relay normally closed auxiliary contacts 50 are open to deenergize the first stop indicating lamp 40 to no longer indicate to the staff. After the intermediate relay coil 10 is powered off, the two intermediate relay normally-open auxiliary contacts 30 are opened to power off the first operation indicator lamp 20, so that the worker is not prompted any more, and meanwhile, the two intermediate relay normally-closed auxiliary contacts 50 are closed to power on the first stop indicator lamp 40 to prompt the worker that the equipment is not operated. Because an intermediate relay normally-open auxiliary contact 30 is respectively connected in series in the front and back of the first operation indicating lamp 20, the two intermediate relay normally-open auxiliary contacts 30 cut off the circuit of the first operation indicating lamp 20, so that the induction circuit of the first operation indicating lamp 20 is cut off, the effect of eliminating induction voltage is achieved, and the accuracy of indication of the first operation indicating lamp 20 is improved. Similarly, the sensing line of the first stop indicator lamp 40 is also cut off, and the accuracy of the indication of the first stop indicator lamp 40 is increased. This arrangement reduces the problem of erroneous judgment of the first running indicator lamp 20 and the first stop indicator lamp 40, and increases the safety of manual operation.
As shown in fig. 1, the first stop circuit 4 further has at least one second stop indicator lamp 60, and each second stop indicator lamp 60 is provided in parallel with the first stop indicator lamp 40. The second stop indicator lamp 60 is also used for indicating that the equipment is in a non-working state, the second stop indicator lamp 60 and the first stop indicator lamp 40 are on and off simultaneously, and the first stop indicator lamp 40 and the second stop indicator lamp 60 are located at different positions, so that an operator can observe the running state of the equipment at different positions. In addition, the first stop indicator lamp 40 and the second stop indicator lamp 60 are also mutually replaced, so that the accuracy of indication can be increased, the phenomenon that one of the first stop indicator lamp 40 and the second stop indicator lamp 60 is damaged and the other one of the first stop indicator lamp 40 and the second stop indicator lamp 60 can continue to work is avoided, the misjudgment situation is reduced, and the safety of manual operation is improved.
As shown in fig. 1, the operating circuit 1 includes a contactor coil 70, and the control circuit 2 further includes a contactor normally open auxiliary contact 80 connected in series with the intermediate relay coil 10, the contactor coil 70 being energized to close the contactor normally open auxiliary contact 80, so that the intermediate relay coil 10 is energized. This arrangement facilitates the operation of the control circuit 2 by the operation circuit 1, so that whether the intermediate relay coil 10 is energized or not becomes controllable. In addition, the arrangement facilitates the maintenance of the anti-induction circuit of the operating column indicator lamp. After the operation circuit 1 receives the power-on instruction, the first operation indicating lamp 20 is not lighted, and the fact that a circuit has a problem in the anti-induction circuit of the operation column indicating lamp is proved, at the moment, the circuit of the contactor coil 70 part is firstly checked, then the middle relay coil 10 part is checked, and finally the first operation circuit 3 part is checked, so that the problem can be rapidly checked on which part of the anti-induction circuit of the operation column indicating lamp, and the overhauling efficiency is improved.
As shown in fig. 1, the operating circuit 1 further includes a second operation indicator lamp 90, and the second operation indicator lamp 90 is disposed in parallel with the contactor coil 70. The second operation indicator light 90 can also indicate the operation state of the device, and is located at a different position from the first operation indicator light 20, so that the operation state of the device can be observed by an operator at different positions. The second running indicator 90 is complementary to the first running indicator 20. The arrangement can increase the indicating accuracy, avoid that one of the first operation indicating lamp 20 and the second operation indicating lamp 90 breaks down and the other one can continue to work, reduce the misjudgment condition and increase the safety of manual operation.
As shown in fig. 1, the operating circuit 1 further includes a remote operating circuit 160 and a field operating circuit 170 connected in parallel with each other, and a transfer switch 100, wherein the remote operating circuit 160 and the field operating circuit 170 are connected in parallel and then connected in series with the contactor coil 70, and the transfer switch 100 controls switching of the remote operating circuit 160 and the field operating circuit 170. By arranging the remote operation circuit 160 and the field operation circuit 170 which are connected in parallel in the operation circuit 1, a user can perform two operation modes of field operation and remote operation, and the convenience of the operation of the anti-induction circuit of the operation column indicator lamp is improved.
Specifically, the operation circuit 1 further has a field operation column 210, the field operation column 210 includes a field operation stop switch 220 and a field operation start switch 230, and the field operation stop switch 220, the transfer switch 100, and the field operation start switch 230 are connected in series in this order, so that the field operation stop switch 220 can turn off the field operation circuit 170 and also turn off the remote operation circuit 160. The working mode of remote start and field stop can be realized, and the convenience of the work of the anti-induction circuit of the indicating lamp of the operating column is increased.
As shown in fig. 1, the remote operation circuit 160 includes a meter start switch 250, and when the remote operation is performed in the machine room, the transfer switch 100 turns on the remote operation circuit 160, and then the meter start switch 250 is closed to turn on the operation circuit 1, thereby implementing the remote operation.
As shown in fig. 1, the operating circuit 1 further includes a trip relay output normally-closed node 180 of the microcomputer motor protection device to protect the operating column indicator light anti-induction circuit and reduce the occurrence of safety accidents.
As shown in fig. 1, the operating circuit 1 further includes a normally open switch 110, the normally open switch 110 being disposed in parallel with the remote operating circuit 160 and the field operating circuit 170. When the intermediate relay coil 10 is energized, a signal is simultaneously sent to the normally open switch 110 to close the normally open switch 110, so as to turn on the line of the second operation indicator lamp 90. It should be noted that the normally open switch 110 has the same function as the normally open auxiliary contact of the intermediate relay.
As shown in fig. 1, the operating circuit 1 further comprises a microcomputer motor protection device trip relay output second normally open node 200, the microcomputer motor protection device trip relay output second normally open node 200 being arranged in parallel with the normally open switch 110 and functioning the same as the normally open switch 110.
As shown in fig. 1, the operation column indicator lamp reactance circuit further includes a ground protection circuit 120, and the ground protection circuit 120 is connected in parallel with the operation circuit 1. The ground protection circuit 120 can provide protection for the anti-induction circuit of the operation column indicator lamp, and safety accidents are reduced. The ground protection circuit 120 includes a micro-electromechanical machine protection device trip relay output first normally open node 190 and a circuit breaker 260 to protect the power lines and the motor and reduce the occurrence of safety accidents.
As shown in fig. 1, the column indicator light anti-sense circuit further includes a switch 270, and the switch 270 controls the power-on state of the column indicator light anti-sense circuit.
As shown in fig. 1, the operation column indicator light anti-induction circuit further includes a device power protection circuit, the device power protection circuit includes a micro-electromechanical machine protection device 130 and a micro-break switch 140, the micro-break switch 140 is connected in series with the micro-electromechanical machine protection device 130, and the micro-break switch 140 controls the power-on state of the micro-electromechanical machine protection device 130.
As shown in fig. 1, the operation column indicator light anti-induction circuit further includes a motor protection circuit, the motor protection circuit includes a micro-electromechanical machine protection device 130 and a micro-break switch 140, the micro-break switch 140 is connected in series with the micro-electromechanical machine protection device 130, and the micro-break switch 140 controls the power-on state of the micro-electromechanical machine protection device 130. The motor protection circuit is connected to the same zero line as the operating circuit 1, and the live line connected to the operating circuit 1 and the live line connected to the motor protection circuit are taken from different phases of the three-phase circuit. The motor protection circuit protects the operating column indicator light anti-induction circuit.
Specifically, the first stop indicator lamp 40 is a green lamp; the first running indicator lamp 20 is a red lamp. This arrangement makes it possible to quickly distinguish which operating state the apparatus is in, and makes it easy to distinguish between the first stop indicator lamp 40 and the first running indicator lamp 20.
In addition, the second stop indicator lamp 60 is also a green lamp, and the second running indicator lamp 90 is also a red lamp. The same function as the first stop indicator lamp 40 and the first running indicator lamp 20. Of course, the first stop indicator light 40 and the first operation indicator light 20 may be in other colors, and it is only necessary to ensure that the first stop indicator light 40 is different from the first operation indicator light 20 in color, the first operation indicator light 20 is the same as the second operation indicator light 90 in color, and the first stop indicator light 40 is the same as the second stop indicator light 60 in color.
As shown in fig. 1, the operation circuit 1 further includes a meter stop switch 150, and the meter stop switch 150 is connected in series with the remote operation circuit 160 and the field operation circuit 170. The meter stop switch 150 is provided in parallel with the field operation stop switch 220, and can turn off the field operation circuit 170 and also turn off the remote operation circuit 160. The working modes of two-position control, field starting and remote stopping can be realized by setting the instrument stop switch.
It is obvious that the above described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An operating column indicator light anti-induction circuit, comprising:
an operating circuit (1);
a control circuit (2), the control circuit (2) being arranged in parallel with the operating circuit (1), and the control circuit (2) having an intermediate relay coil (10);
the first operation circuit (3), the first operation circuit (3) and the operation circuit (1) are arranged in parallel, the first operation circuit (3) is provided with a first operation indicator lamp (20) and two intermediate relay normally-open auxiliary contacts (30) which are connected in series in front of and behind the first operation indicator lamp (20);
a first stop circuit (4), the first stop circuit (4) being disposed in parallel with the operating circuit (1), the first stop circuit (4) having a first stop indicator (40) and two intermediate relay normally-closed auxiliary contacts (50) connected in series before and after the first stop indicator (40), wherein the operating circuit (1) receives a power-on instruction to power on the intermediate relay coil (10) of the control circuit (2) so that the two intermediate relay normally-open auxiliary contacts (30) of the first operating circuit (3) are closed, the two intermediate relay normally-closed auxiliary contacts (50) of the first stop circuit (4) are opened, the first operation indicator (20) is turned on, and the first stop indicator (40) is turned off.
2. The mast indicator light anti-induction circuit according to claim 1, characterized in that the first stop circuit (4) further has at least one second stop indicator light (60), and each of the second stop indicator lights (60) is provided in parallel with the first stop indicator light (40).
3. The operation column indicating lamp anti-induction circuit according to claim 1,
the operating circuit (1) comprises a contactor coil (70);
the control circuit (2) further comprises a contactor normally-open auxiliary contact (80) connected in series with the intermediate relay coil (10), and the contactor coil (70) is electrified to close the contactor normally-open auxiliary contact (80) so that the intermediate relay coil (10) is electrified.
4. The mast indicator lamp anti-induction circuit according to claim 3, characterized in that the operating circuit (1) further comprises a second running indicator lamp (90), the second running indicator lamp (90) being arranged in parallel with the contactor coil (70).
5. The operation column indicator light anti-induction circuit according to claim 3, characterized in that the operation circuit (1) further comprises:
a remote operation circuit (160) and a field operation circuit (170) which are connected in parallel, wherein the remote operation circuit (160) and the field operation circuit (170) are connected in parallel and then are connected in series with the contactor coil (70);
a transfer switch (100), the transfer switch (100) controlling switching of the remote operating circuit (160) and the field operating circuit (170).
6. The operating column indicator light anti-induction circuit according to claim 5, characterized in that the operating circuit (1) further comprises a normally open switch (110), the normally open switch (110) being arranged in parallel with the remote operating circuit (160) and the field operating circuit (170).
7. The operatory column indicator light anti-induction circuit according to any of claims 1 to 6, further comprising a ground protection circuit (120), the ground protection circuit (120) being connected in parallel with the operation circuit (1).
8. The courtesy lamp anti-induction circuit according to any of the claims 1 to 6, characterized in that it further comprises a motor protection circuit comprising a micro-electromechanical motor protection device (130) and a micro-break switch (140), said micro-break switch (140) being connected in series with said micro-electromechanical motor protection device (130) and said micro-break switch (140) controlling the energization state of said micro-electromechanical motor protection device (130).
9. The operation column indicator light anti-induction circuit according to any one of claims 1 to 6,
the first stop indicator light (40) is a green light; and/or
The first operation indicator lamp (20) is a red lamp.
10. Operating column indicator light anti-induction circuit according to claim 5 or 6, characterized in that the operating circuit (1) further comprises an instrument stop switch (150), the instrument stop switch (150) being in series with the remote operating circuit (160) and the field operating circuit (170).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921148134.2U CN210725432U (en) | 2019-07-19 | 2019-07-19 | Anti-induction circuit of operating column indicator lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921148134.2U CN210725432U (en) | 2019-07-19 | 2019-07-19 | Anti-induction circuit of operating column indicator lamp |
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| Publication Number | Publication Date |
|---|---|
| CN210725432U true CN210725432U (en) | 2020-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921148134.2U Active CN210725432U (en) | 2019-07-19 | 2019-07-19 | Anti-induction circuit of operating column indicator lamp |
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| CN (1) | CN210725432U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112469176A (en) * | 2020-12-21 | 2021-03-09 | 珠海格力电器股份有限公司 | Control circuit and method for preventing false lighting of indicator lamp, storage medium and apparatus |
-
2019
- 2019-07-19 CN CN201921148134.2U patent/CN210725432U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112469176A (en) * | 2020-12-21 | 2021-03-09 | 珠海格力电器股份有限公司 | Control circuit and method for preventing false lighting of indicator lamp, storage medium and apparatus |
| CN112469176B (en) * | 2020-12-21 | 2022-04-22 | 珠海格力电器股份有限公司 | Control circuit and method for preventing false lighting of indicator lamp, storage medium and apparatus |
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