CN217933616U - Relay protection circuit applied to control panel - Google Patents
Relay protection circuit applied to control panel Download PDFInfo
- Publication number
- CN217933616U CN217933616U CN202221933772.7U CN202221933772U CN217933616U CN 217933616 U CN217933616 U CN 217933616U CN 202221933772 U CN202221933772 U CN 202221933772U CN 217933616 U CN217933616 U CN 217933616U
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- relay
- contact
- discharge tube
- control panel
- protection circuit
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Abstract
The utility model discloses a relay protection circuit applied to a control panel, which comprises a relay K1, a fuse F1, a piezoresistor RV1, a discharge tube Z1, a thermistor RT1, an MOS tube Q2, a resistor RA2 and a capacitor CA2; surge is absorbed by adding the piezoresistor RV1, and then discharge is carried out through the discharge tube Z1, so that the other end of the contact of the relay K1 obtains stable voltage, and the contact of the relay K1 and a load carried by the rear end of the contact can be protected.
Description
Technical Field
The utility model relates to an intelligence house field, in particular to be applied to control panel's relay protection circuit.
Background
At present, with the development of smart homes more and more, the required panel control is more and more, but the traditional panel has certain defects, for example, the relay lacks necessary protection, such as overcurrent protection and anti-surge lamp, and the relay needs to be frequently operated, if the relay does not have the protection, the relay is easy to damage and has short service life, and the control panel is also easy to damage and has short service life, so that a relay protection circuit applied to the control panel is urgently needed to solve the problems.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a be applied to control panel's relay protection circuit.
The utility model discloses an embodiment solves the technical scheme that its technical problem adopted and is: the utility model provides a be applied to control panel's relay protection circuit, including relay K1, fuse F1, piezo-resistor RV1, discharge tube Z1, thermistor RT1, MOS pipe Q2, resistance RA2 and electric capacity CA2, resistance RA 2's one end is connected with host system, resistance RA 2's the other end is connected with MOS pipe Q2's grid and electric capacity CA 2's one end respectively, electric capacity CA 2's the other end is connected with MOS pipe Q2's source electrode and earthing terminal respectively, MOS pipe Q2's drain electrode is connected with the one end of relay K1 coil, the other end and the power module of relay K1 coil are connected, the one end and the zero line N of relay K1 contact are connected, the other end of relay K1 contact is connected with piezo-resistor RV 1's one end and Z1's one end respectively, discharge tube Z1's the other end is connected with zero line N through thermistor RT1, piezo-resistor RV 1's the other end is connected with live wire L through fuse F1.
The utility model has the advantages that: a relay protection circuit applied to a control panel comprises a relay K1, a fuse F1, a piezoresistor RV1, a discharge tube Z1, a thermistor RT1, an MOS tube Q2, a resistor RA2 and a capacitor CA2, wherein one end of the resistor RA2 is connected with a main control module, the other end of the resistor RA2 is respectively connected with a grid electrode of the MOS tube Q2 and one end of the capacitor CA2, the other end of the capacitor CA2 is respectively connected with a source electrode and a grounding end of the MOS tube Q2, a drain electrode of the MOS tube Q2 is connected with one end of a coil of the relay K1, the other end of the coil of the relay K1 is connected with a power module, one end of a contact of the relay K1 is connected with a zero line N, the other end of the contact of the relay K1 is respectively connected with one end of the piezoresistor RV1 and one end of the discharge tube Z1, the other end of the discharge tube Z1 is connected with the zero line N through the thermistor RT1, and the other end of the piezoresistor RV1 is connected with a live wire L through the fuse F1; surge is absorbed by adding the piezoresistor RV1, and then discharge is carried out through the discharge tube Z1, so that the other end of the contact of the relay K1 obtains stable voltage, and the contact of the relay K1 and a load at the rear end of the contact can be protected.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a circuit diagram of a relay protection circuit applied to a control panel.
Detailed Description
This section will describe in detail the embodiments of the present invention, the preferred embodiments of which are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can visually and vividly understand each technical feature and the whole technical solution of the present invention, but it cannot be understood as a limitation to the scope of the present invention.
In the description of the present invention, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as excluding the number, and the terms greater than, less than, etc. are understood as including the number. If there is a description of first and second for the purpose of distinguishing technical features only, this is not to be understood as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of technical features indicated.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise explicitly defined, the terms "set," "mounted," "connected," and the like are to be understood in a broad sense, and may be directly connected or indirectly connected through an intermediate medium, for example; can be fixedly connected, can also be detachably connected and can also be integrally formed; may be a mechanical connection; either as communication within the two elements or as an interactive relationship of the two elements. The technical skill in the art can reasonably determine the specific meaning of the above words in the present invention by combining the specific contents of the technical solution.
Referring to fig. 1, a be applied to relay protection circuit of control panel, a serial communication port, including relay K1, fuse F1, piezo-resistor RV1, discharge tube Z1, thermistor RT1, MOS tube Q2, resistance RA2 and electric capacity CA2, resistance RA 2's one end is connected with main control module 20, resistance RA 2's the other end is connected with MOS tube Q2's grid and electric capacity CA 2's one end respectively, electric capacity CA 2's the other end is connected with MOS tube Q2's source and earthing terminal respectively, MOS tube Q2's the drain electrode is connected with relay K1 coil's one end, relay K1 coil's the other end is connected with power module 10, relay K1 contact's one end is connected with zero line N, relay K1 contact's the other end is connected with piezo-resistor RV 1's one end and discharge tube Z1's one end respectively, discharge tube Z1's the other end is connected with zero line N through thermistor RT1, relay RV 1's the other end is connected with live wire L through fuse F1.
The utility model discloses in, relay K1 sets up a series of protect function, the circuit is PWM1 for the output of host system 10 during normal operation, MOS pipe Q2 switches on, relay K1's coil gets electricity, relay K1's contact is closed, make the L end get electricity, connect the load work that holds at L, otherwise PWM1 is the low level, MOS pipe Q2 is closed, relay K1's coil loses electricity, relay K1's contact disconnection, make the L end lose electricity, connect the load that holds out of work, wherein:
(1) When the relay K1 is in a disconnected state, the surge enters the L end and absorbs the surge from the voltage dependent resistor RV1 through the fuse F1, and then the surge is discharged through the discharge tube Z1, so that the other end of the relay K1 contact obtains stable voltage to protect the relay K1 contact;
(2) When the relay K1 is in a closed state, the surge enters the L end and absorbs the surge from the piezoresistor RV1 through the fuse F1, and then the surge is discharged through the discharge tube Z1, so that the other end of the contact of the relay K1 obtains stable voltage to protect the contact of the relay K1 and a load at the rear end of the contact;
(3) When relay K1 is in the closure state, the surge enters into piezo-resistor RV1 from relay K1 load end L1 and absorbs the surge, discharges through discharge tube Z1 again for the one end of relay K1 contact obtains stable voltage, and the load in protection relay K1's contact and its rear end area improves relay K1 and uses the utility model discloses a relay protection circuit's control panel life-span.
The present invention is not limited to the above embodiments, and equivalent modifications and substitutions may be made by those skilled in the art without departing from the spirit of the present invention, and the equivalents and substitutions are intended to be included within the scope of the present invention as defined by the appended claims.
Claims (1)
1. The utility model provides a be applied to control panel's relay protection circuit, a serial communication port, including relay K1, fuse F1, piezo-resistor RV1, discharge tube Z1, thermistor RT1, MOS pipe Q2, resistance RA2 and electric capacity CA2, resistance RA 2's one end is connected with main control module (20), resistance RA 2's the other end is connected with MOS pipe Q2's grid and electric capacity CA 2's one end respectively, electric capacity CA 2's the other end is connected with MOS pipe Q2's source electrode and earthing terminal respectively, MOS pipe Q2's drain electrode is connected with the one end of relay K1 coil, the other end of relay K1 coil is connected with power module (10), the one end and the zero line N of relay K1 contact are connected, the other end of relay K1 contact is connected with piezo-resistor RV 1's one end and discharge tube Z1's one end respectively, discharge tube Z1's the other end is connected with zero line N through thermistor RT1, resistance RV 1's the other end is connected with live wire L through fuse F1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221933772.7U CN217933616U (en) | 2022-07-22 | 2022-07-22 | Relay protection circuit applied to control panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221933772.7U CN217933616U (en) | 2022-07-22 | 2022-07-22 | Relay protection circuit applied to control panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217933616U true CN217933616U (en) | 2022-11-29 |
Family
ID=84149102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221933772.7U Active CN217933616U (en) | 2022-07-22 | 2022-07-22 | Relay protection circuit applied to control panel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217933616U (en) |
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2022
- 2022-07-22 CN CN202221933772.7U patent/CN217933616U/en active Active
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