CN215860735U - Air compressor switch control device, air compressor switch and air compressor - Google Patents
Air compressor switch control device, air compressor switch and air compressor Download PDFInfo
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- CN215860735U CN215860735U CN202121521713.4U CN202121521713U CN215860735U CN 215860735 U CN215860735 U CN 215860735U CN 202121521713 U CN202121521713 U CN 202121521713U CN 215860735 U CN215860735 U CN 215860735U
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- air compressor
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- compressor switch
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- 230000006698 induction Effects 0.000 claims abstract description 30
- 230000003111 delayed effect Effects 0.000 abstract description 5
- 230000009191 jumping Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The embodiment of the utility model provides an air compressor switch control device, an air compressor switch and an air compressor. The air compressor switch control device comprises a power-off delay relay, wherein the power-off delay relay comprises an induction coil, a first normally closed contact and a second normally closed contact; the induction coil is connected with an action contact of a protection device of an air compressor switch, so that the induction coil KT is electrified when the protection device performs protection action and is powered off when the protection action returns; the first normally closed contact is connected in the air compressor switch, and the second normally closed contact is connected in the connecting circuit of the protection device and the PLC. By adopting the technical scheme of the embodiment of the utility model, the delayed switching-on of the air compressor switch after the protection action returns can be controlled, so that the problem of continuous switching-on and switching-off jumping of the air compressor switch caused by quick return of the protection action is effectively solved; and the equipment is simple and the performance is reliable.
Description
Technical Field
The utility model relates to the technical field of air compressor control, in particular to an air compressor switch control device, an air compressor switch and an air compressor.
Background
The switch of the air compressor generally adopts an electric holding switch to ensure the working safety of the air compressor, and the switch has an electric quantity protection function related to the air compressor. The on-off of the air compressor switch is controlled by a local PLC controller and is used for adjusting the outlet pressure. When the motor of the air compressor breaks down, the switch is used for protecting and acting on tripping, and a tripping instruction is given to the local PLC controller, so that the local PLC controller is disconnected with a closing instruction which is kept all the time, and the switch of the air compressor is disconnected.
Under this kind of control mode, when the air compressor machine trouble is under the snap protection, because the action time is at the millisecond level, the action returns very fast, and the protection action instruction duration for local PLC controller is shorter in this in-process, causes local PLC to can not gather the reversal of instruction easily, still keeps the operation instruction, causes the air compressor machine switch to divide and shut the jump in succession, leads to the damage of air compressor machine and switch.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides an air compressor switch control device, an air compressor switch and an air compressor, which are used for controlling the air compressor switch to be switched on in a delayed mode after a protection action returns, so that the problem of continuous on-off jumping of the air compressor switch caused by quick return of the protection action is solved.
According to a first aspect of the present invention, an embodiment of the present invention provides an air compressor switch control device, which includes a power-off delay relay, where the power-off delay relay includes an induction coil, and a first normally closed contact and a second normally closed contact; the induction coil is connected with an action contact of a protection device of an air compressor switch, so that the induction coil KT is electrified when the protection device performs protection action and is powered off when the protection action returns; the first normally closed contact is connected in the air compressor switch, and the second normally closed contact is connected in the connecting circuit of the protection device and the PLC.
Optionally, the actuating contact of the protection device comprises a normally open contact, and the induction coil is connected to the normally open contact.
Optionally, the action contact of the protection device comprises a normally closed contact, and the air compressor switch control device further comprises an intermediate relay; the control coil of the intermediate relay is connected with the normally closed contact, and the induction coil is connected with the third normally closed contact of the intermediate relay.
Optionally, the preset delay time of the power-off delay relay is in a range of 2-3 s.
According to a second aspect of the present invention, an embodiment of the present invention further provides an air compressor switch, which includes the air compressor switch control device of any one of the foregoing.
According to a third aspect of the present invention, an embodiment of the present invention further provides an air compressor, wherein the air compressor comprises any one of the air compressor switch control devices described above, or comprises the air compressor switch described above.
According to the air compressor switch control device, the air compressor switch and the air compressor, the power-off delay relay is arranged to be matched with the air compressor switch protection device and the local PLC, so that the air compressor switch can be instantly tripped when the protection device performs protection actions, the local PLC is used for delaying the switch-on of the air compressor switch after the protection actions are completed, the delay function of the power-off delay relay is utilized for controlling the delayed switch-on of the air compressor switch after the protection actions return, and the problem of continuous switch-on and switch-off jumping of the air compressor switch caused by quick return of the protection actions is effectively solved.
Drawings
Fig. 1 is a schematic diagram of a first structure of an air compressor on-off control device according to an embodiment of the present invention;
fig. 2 is a second schematic structural diagram of an air compressor on-off control device according to an embodiment of the present invention.
The reference numbers illustrate:
AR 1-normally open contact; AR 2-normally closed contact; KT-induction coil; KT 1-first normally closed contact; KT 2-second normally closed contact; k1-control coil; k11-third normally closed contact.
Detailed Description
The following detailed description of embodiments of the utility model is provided in conjunction with the accompanying drawings (like numerals indicate like elements throughout the several views) and examples. The following examples are intended to illustrate the utility model but are not intended to limit the scope of the utility model.
Fig. 1 and 2 show schematic structural diagrams of an air compressor on-off control device according to an embodiment of the present invention. The air compressor switch control device provided by the embodiment of the utility model can be arranged in an air compressor or integrated on an air compressor switch and is used for being matched with a local PLC of the air compressor switch to control the tripping and closing of the air compressor switch.
Referring to fig. 1 and 2, the air compressor switch control device of the embodiment of the present invention includes a power-off delay relay, which includes an induction coil KT, a first normally closed contact KT1, and a second normally closed contact KT 2; the induction coil KT is connected with an action contact of a protection device of an air compressor switch, and can be specifically connected in series between the anode and the cathode of a power supply; the first normally closed contact KT1 is connected to an air compressor switch, and can be specifically connected to an internal main circuit of the air compressor switch; the second normally closed contact KT2 is connected in the connecting line of the protection device and the PLC (local PLC of the air compressor switch).
According to the exemplary embodiment of the utility model, when the protection device of the air compressor switch does not perform the protection action, the induction coil KT of the power-off delay relay is not electrified, the first normally closed contact KT1 and the second normally closed contact KT2 are in a closed state, and the air compressor switch continuously executes the closing instruction of the local PLC.
When the protection device performs protection action due to factors such as air compressor motor faults, the induction coil KT of the power-off delay relay is connected with the action contact, the induction coil KT can be electrified instantly, so that the second normally-closed contact KT2 is disconnected, the connecting circuit between the local PLC and the protection device is disconnected, and the local PLC sends a tripping instruction to the air compressor switch; and the first normally closed contact KT1 is also disconnected, so that the internal circuit of the air compressor switch is disconnected, and the air compressor switch can be further ensured to complete the shutdown of the air compressor.
When the protection action of the protection device returns, the induction coil KT is powered off, and the first normally closed contact KT1 can be closed after the preset delay time, so that the internal circuit of the air compressor switch is connected after the preset delay time; and the second normally closed contact KT2 is also closed after the preset delay time, so that the local PLC can receive the information returned by the protection action after the preset delay time and send a closing instruction to the air compressor switch, that is, the air compressor switch can receive the closing instruction sent by the local PLC to close after the protection action returns the preset delay time.
The preset time delay can be set according to the actual working condition of the air compressor, for example, the range of the preset time delay can be 1-5s, and is preferably 2-3s, the problem that the continuous on-off tripping of the switch of the air compressor cannot be effectively solved due to the fact that the preset time delay is too small can be avoided, and the problem that the working efficiency of the air compressor is influenced due to the fact that the preset time delay is too large is avoided.
In an alternative embodiment, as shown in fig. 1, the actuating contact of the protection device includes a normally open contact AR1, and the induction coil KT is connected to a normally open contact AR1, wherein the normally open contact AR1 and the induction coil KT are connected in series between the positive and negative poles of the power supply.
When the protection device does not perform protection action, the normally open contact AR1 is in an open state, the induction coil KT is not electrified, and the first normally closed contact KT1 and the second normally closed contact KT2 are in a closed state; when the protection action occurs, the normally open contact AR1 is closed, so that the induction coil KT is electrified, and the first normally closed contact KT1 and the second normally closed contact KT2 are disconnected; when the protection action returns, the normally open contact AR1 is opened, so that the induction coil KT is deenergized, and the first normally closed contact KT1 and the second normally closed contact KT2 are closed with a delay.
In another alternative embodiment, as shown in fig. 2, the actuating contact of the protection device includes a normally closed contact AR2, and the air compressor switch control device further includes an intermediate relay; the control coil K1 of the intermediate relay is connected to the normally closed contact AR2, and the induction coil KT is connected to the third normally closed contact K11 of the intermediate relay. The normally closed contact AR2 and the control coil K1 are connected in series between the positive pole and the negative pole of the power supply, and the third normally closed contact K11 and the induction coil KT are connected in series between the positive pole and the negative pole of the power supply.
When the protection device does not perform protection action, the normally-closed contact AR2 is in a connected state, the control coil K1 of the intermediate relay is electrified, the third normally-closed contact K11 is in a disconnected state, the induction coil KT is not electrified, and the first normally-closed contact KT1 and the second normally-closed contact KT2 are in a closed state. When the protection action occurs, the normally closed contact AR2 is opened, so that the control coil K1 is deenergized, the third normally closed contact K11 is closed, the induction coil KT is further electrified, and the first normally closed contact KT1 and the second normally closed contact KT2 are opened. When the protection action returns, the normally closed contact AR2 is closed, so that the control coil K1 is charged, the third normally closed contact K11 is opened, the induction coil KT is further de-energized, and the first normally closed contact KT1 and the second normally closed contact KT2 are closed in a delayed manner.
According to the air compressor switch control device provided by the embodiment of the utility model, the power-off delay relay is arranged to be matched with the air compressor switch protection device and the local PLC, so that the air compressor switch can be instantaneously tripped when the protection device performs protection action, the local PLC is used for delaying the switch-on of the air compressor switch after the protection action is completed, the time delay function of the power-off delay relay is utilized for controlling the switch-on of the air compressor switch after the protection action returns, and the problem of continuous switch-on and switch-off jumping of the air compressor switch caused by quick return of the protection action is effectively solved.
Compared with the control mode that the local PLC is directly connected with the protection device in the prior art, the air compressor switch control device provided by the embodiment of the utility model can control the air compressor switch to be switched on in a delayed mode after the protection action returns, so that the problem of continuous switching on and off jumping of the air compressor switch caused by quick return of the protection action is avoided, the working stability of the air compressor can be further ensured, and the working efficiency of the air compressor is effectively improved.
On the basis of the air compressor switch control device provided by the embodiment of the utility model, the embodiment of the utility model also provides an air compressor switch, and the air compressor switch comprises the air compressor switch control device provided by the embodiment of the utility model.
Further, an embodiment of the present invention further provides an air compressor, where the air compressor includes the air compressor switch control device in the above-described embodiment of the present invention, or includes the air compressor switch in the above-described embodiment of the present invention.
The air compressor switch and the air compressor provided by the embodiment of the utility model have the same working principle and beneficial effects, and are not repeated herein.
It should be noted that, according to the implementation requirement, each component described in the embodiment of the present invention may be divided into more components, and two or more components or parts of components may be combined into a new component to achieve the purpose of the embodiment of the present invention.
The above embodiments are only for illustrating the embodiments of the present invention and not for limiting the embodiments of the present invention, and those skilled in the art can make various changes, modifications or substitutions without departing from the spirit and scope of the embodiments of the present invention, so that all equivalent technical solutions also belong to the scope of the embodiments of the present invention, and the scope of patent protection of the embodiments of the present invention should be defined by the claims.
Claims (6)
1. The switch control device of the air compressor is characterized by comprising a power-off delay relay, wherein the power-off delay relay comprises an induction coil (KT), a first normally closed contact (KT1) and a second normally closed contact (KT 2);
the induction coil (KT) is connected with an action contact of a protection device of an air compressor switch, the first normally closed contact (KT1) is connected with the air compressor switch, and the second normally closed contact (KT2) is connected in a connecting circuit of the protection device and the PLC;
when the protection device performs protection action, the induction coil (KT) is electrified, and the first normally-closed contact (KT1) and the second normally-closed contact (KT2) are disconnected;
when the protection action returns, the induction coil (KT) is powered off, and the first normally closed contact (KT1) and the second normally closed contact (KT2) are closed after a preset delay time.
2. The air compressor switch control device according to claim 1, characterized in that the action contacts of the protection device comprise a normally open contact (AR1), the induction coil (KT) being connected with the normally open contact (AR 1).
3. The air compressor on-off control device according to claim 1, wherein the actuating contact of the protection device comprises a normally closed contact (AR2), the air compressor on-off control device further comprising an intermediate relay;
the control coil (K1) of the intermediate relay is connected with the normally closed contact (AR2), and the induction coil (KT) is connected with the third normally closed contact (K11) of the intermediate relay.
4. The air compressor on-off control device according to any one of claims 1 to 3, wherein the preset delay time duration of the power-off delay relay ranges from 2 s to 3 s.
5. An air compressor switch characterized in that it comprises the air compressor switch control device of any one of claims 1 to 4.
6. An air compressor, characterized in that the air compressor includes the air compressor on-off control device of any one of claims 1 to 4, or includes the air compressor on-off of claim 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121521713.4U CN215860735U (en) | 2021-07-06 | 2021-07-06 | Air compressor switch control device, air compressor switch and air compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121521713.4U CN215860735U (en) | 2021-07-06 | 2021-07-06 | Air compressor switch control device, air compressor switch and air compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215860735U true CN215860735U (en) | 2022-02-18 |
Family
ID=80332756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121521713.4U Expired - Fee Related CN215860735U (en) | 2021-07-06 | 2021-07-06 | Air compressor switch control device, air compressor switch and air compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215860735U (en) |
-
2021
- 2021-07-06 CN CN202121521713.4U patent/CN215860735U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220218 |