CN213693136U - Vehicle-mounted interphone with over-temperature protection - Google Patents
Vehicle-mounted interphone with over-temperature protection Download PDFInfo
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- CN213693136U CN213693136U CN202022783129.8U CN202022783129U CN213693136U CN 213693136 U CN213693136 U CN 213693136U CN 202022783129 U CN202022783129 U CN 202022783129U CN 213693136 U CN213693136 U CN 213693136U
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Abstract
The utility model provides an on-vehicle intercom with excess temperature protection, including DC power supply, a control module, a relay, radio frequency circuit, a power module, first triode, the fan, fan switch module and temperature detection module, temperature detection module sets up in on-vehicle intercom and is connected with the first input of control module, radio frequency circuit's first input passes through the normally open contact of relay and is connected with DC power supply, the second input is connected with voltage stabilizing circuit's second output, the third input is connected with the switch circuit output, first triode base is connected with the first output of control module, the relay coil concatenates between DC power supply and first triode collecting electrode. The utility model discloses can in time be the intercom cooling, prevent that the performance of components and parts from worsening because of high temperature work, also avoid appearing overheated phenomenon on fire.
Description
Technical Field
The utility model relates to an on-vehicle intercom with excess temperature protection.
Background
The vehicle-mounted interphone is usually installed on a transportation means or placed in a certain place as a relay station for a long time, and at the moment, the requirement of the vehicle-mounted interphone on reliability and safety is very high, and the requirement of the vehicle-mounted interphone on the service life is also very high.
However, the vehicle-mounted interphone has high radio frequency power and high power consumption, the temperature of the interphone gradually rises along with the increase of the continuous service time, the working limit temperature of electronic components is generally 125 ℃, the performance of the electronic components deteriorates when the working limit temperature exceeds or works for a long time under the limit temperature, and meanwhile, the service life of the electronic components is influenced and even the vehicle-mounted interphone is on fire.
SUMMERY OF THE UTILITY MODEL
The utility model aims at prior art not enough, provide an on-vehicle intercom with excess temperature protection, can in time be the intercom cooling, prevent that the performance of components and parts from worsening because of high temperature work, also avoid appearing overheated phenomenon of catching a fire.
The utility model discloses a following technical scheme realizes:
a vehicle-mounted interphone with over-temperature protection comprises a direct-current power supply, a control module, a relay, a radio frequency circuit, a first power supply module, a first triode, a fan switch module and a temperature detection module, wherein the temperature detection module is arranged in the vehicle-mounted interphone and connected with a first input end of the control module, the first power supply module comprises a voltage stabilizing circuit of which the input end is connected with the direct-current power supply through a normally open contact of the relay and a switch circuit connected with a first output end of the voltage stabilizing circuit, a first input end of the radio frequency circuit is connected with the direct-current power supply through a switch of the relay, a second input end of the radio frequency circuit is connected with a second output end of the voltage stabilizing circuit, a third input end of the radio frequency circuit is connected with an output end of the switch circuit, a base electrode of the first triode is connected with a first output end of the control module, a coil of the relay is, The second input end is connected with a direct current power supply, and the output end is connected with the fan.
Further, fan switch module includes band elimination triode, PNP triode, first resistance and LC filter circuit, and band elimination triode base is fan switch module first input, and the PNP triode emission is fan switch module second input, and band elimination triode collecting electrode is connected with PNP triode base through first resistance, and PNP triode collecting electrode is connected with LC filter circuit input, and the LC filter circuit output is fan switch module output.
Further, the radio frequency circuit comprises a final-stage power amplifying circuit, a push amplifying circuit and a transceiving switching circuit, wherein a first input end of the radio frequency circuit is an input end of the final-stage power amplifying circuit, a second input end of the radio frequency circuit is an input end of the push amplifying circuit, and a third input end of the radio frequency circuit is an input end of the transceiving switching circuit.
Further, the control module comprises a microprocessor.
Further, the temperature detection unit includes a temperature sensor.
Furthermore, the vehicle-mounted interphone further comprises a second power supply module which is connected between the power supply and the input end of the control module in series.
The utility model discloses following beneficial effect has:
1. the utility model utilizes the temperature detection module to detect the temperature in the vehicle-mounted interphone in real time and feed back the temperature to the control module, a high temperature threshold value and a recovery threshold value are arranged in the control module, when the vehicle-mounted interphone normally works, the first output end of the control module outputs high level to the base electrode of the first triode to lead the collector electrode and the emitter electrode of the first triode to be conducted, thereby leading the coil of the relay to be electrified, the normally open contact of the relay is closed, a direct current power supply supplies power for a radio frequency circuit directly or through the first power supply module, the fan does not work at the moment, when the detected temperature exceeds the high temperature threshold value, the first output end of the control module outputs low level to the base electrode of the first triode to lead the collector electrode and the emitter electrode to be disconnected, thereby leading the coil of the relay to lose power, the normally open contact of the relay is disconnected, the direct current power supply, the temperature reduction speed is increased, and when the temperature is reduced to be below the recovery threshold value, the interphone enters a normal working state, so that the interphone is cooled in time, the performance of components is prevented from being deteriorated due to high-temperature work, the service life of the components is prolonged, and the phenomenon of overheating and fire is avoided; moreover, when the temperature exceeded the high temperature threshold value, directly made the intercom stop work when using the fan cooling, for only using the fan to carry out the scheme of cooling, can avoid the condition that the fan cooling rate is not as fast as intercom's rate of rise of temperature, guaranteed the safety of components and parts more effectively, moreover, both combine together, also can make the intercom stop work time shorten greatly to satisfy user's demand.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of the present invention.
Wherein, 1, a direct current power supply; 2. a control module; 3. a relay; J. a relay coil; j1, normally open contact of relay; 41. a final power amplifier circuit; 42. a push amplifying circuit; 43. a transmit-receive switching circuit; 51. a voltage stabilizing circuit; 52. a switching circuit; 6. a second power supply module; 7. a fan switch module; 71. an LC filter circuit; q2, a band-stop triode; q3 and a PNP triode; r, a first resistor; 8. a fan; 9. a temperature detection module; q1, the first triode.
Detailed Description
As shown in fig. 1, the vehicle-mounted interphone with over-temperature protection comprises a direct current power supply 1, a control module 2, a relay 3, a radio frequency circuit, a first power supply module, a second power supply module 6, a first triode Q1, a fan switch module 7, a fan 8 and a temperature detection module 9, wherein the first power supply module comprises a voltage stabilizing circuit 51 of which the input end is connected with the direct current power supply 1 through a relay normally open contact J1 and a switch circuit 52 connected with a first output end of the voltage stabilizing circuit 51, the first input end of the radio frequency circuit is connected with the direct current power supply 1 through a relay normally open contact J1, the second input end is connected with a second output end of the voltage stabilizing circuit 51, a third input sheet is connected with an output end of the switch circuit 52, the temperature detection module 9 is arranged in the vehicle-mounted interphone and is connected with a first input end of the control module 2, a base of the first triode Q1, the relay coil J is connected in series between the direct current power supply 1 and the collector of the first triode Q1, the emitter of the first triode Q1 is grounded, the first input end of the denoising module 7 is connected with the second output end of the control module 2, the second input end is connected with the direct current power supply 1, the output end is connected with the fan 8, the second power supply module 6 is connected in series between the power supply and the input end of the control module 2, and the specific circuit of the second power supply module 6 is the prior art. The first transistor Q1 is an NPN transistor. In another embodiment, the voltage stabilizing circuit can be connected with the direct current power supply through the normally closed contact of the relay, correspondingly, when the detected temperature exceeds the high-temperature threshold, the first output end of the control module outputs a high level to the base electrode of the first triode so as to connect the collector electrode with the emitter electrode of the first triode, so that the coil of the relay is electrified, the normally closed contact of the relay is disconnected, the direct current power supply does not supply power for the radio frequency circuit any more, and the interphone stops working.
The radio frequency circuit comprises a final power amplifying circuit 41, a push amplifying circuit 42 and a transceiving switching circuit 43, wherein a first input end of the radio frequency circuit is an input end of the final power amplifying circuit 41, a second input end of the radio frequency circuit is an input end of the push amplifying circuit 42, and a third input end of the radio frequency circuit is an input end of the transceiving switching circuit 43. The final power amplifier circuit 41, the push amplifier circuit 42, and the transmit/receive switching circuit 43 are conventional.
Fan switch module 7 includes band elimination triode Q2, PNP triode Q3, first resistance R and LC filter circuit 71, band elimination triode Q2 base is the first input end of fan switch module 7, PNP triode Q3 emission pole is fan switch module 7 second input end, band elimination triode Q2 collecting electrode is connected with PNP triode Q3 base through first resistance R, the projecting pole ground connection, PNP triode Q3 collecting electrode is connected with LC filter circuit 71 input, LC filter circuit 71 output is fan switch module 7 output, be connected with fan 8. The specific circuit of the LC filter circuit 71 is the prior art. The rotation of the fan 8 can cause the dc power supply 1 to generate some ripple interference, thereby affecting circuits connected with the dc power supply 1, such as a radio frequency circuit, and the like, and therefore the fan switch module 7 is arranged to remove the ripples to ensure the normal operation of other circuits.
In the present embodiment, the control module 2 is a microprocessor. The temperature detection unit is a temperature sensor.
The above description is only a preferred embodiment of the present invention, and therefore the scope of the present invention should not be limited thereby, and all equivalent changes and modifications made within the scope of the claims and the specification should be considered within the scope of the present invention.
Claims (6)
1. The utility model provides an on-vehicle intercom with excess temperature protection which characterized in that: the temperature detection module is arranged in the vehicle-mounted interphone and connected with a first input end of the control module, the first power supply module comprises a voltage stabilizing circuit of which the input end is connected with the direct-current power supply through a switch of the relay and a switch circuit of which the first output end is connected with a first output end of the voltage stabilizing circuit, a first input end of the radio-frequency circuit is connected with the direct-current power supply through a normally open contact of the relay, a second input end of the radio-frequency circuit is connected with a second output end of the voltage stabilizing circuit, a third input end of the radio-frequency circuit is connected with an output end of the switch circuit, a base of the first triode is connected with a first output end of the control module, a relay coil is connected between the direct-current power supply and a collector electrode of the first triode in series, a first input end of the fan switch module is connected with a second output end of, The second input end is connected with a direct current power supply, and the output end is connected with the fan.
2. The vehicle-mounted interphone with over-temperature protection function as claimed in claim 1, characterized in that: fan switch module includes band elimination triode, PNP triode, first resistance and LC filter circuit, and the band elimination triode base is fan switch module first input, and the PNP triode emission is fan switch module second input, and band elimination triode collecting electrode is connected with PNP triode base through first resistance, and PNP triode collecting electrode is connected with LC filter circuit input, and the LC filter circuit output is fan switch module output.
3. The vehicle-mounted interphone with over-temperature protection function as claimed in claim 1, characterized in that: the radio frequency circuit comprises a final-stage power amplifying circuit, a push amplifying circuit and a receiving and transmitting switching circuit, wherein a first input end of the radio frequency circuit is an input end of the final-stage power amplifying circuit, a second input end of the radio frequency circuit is an input end of the push amplifying circuit, and a third input end of the radio frequency circuit is an input end of the receiving and transmitting switching circuit.
4. The vehicle-mounted interphone with over-temperature protection as claimed in claim 1, 2 or 3, wherein: the control module includes a microprocessor.
5. The vehicle-mounted interphone with over-temperature protection as claimed in claim 1, 2 or 3, wherein: the temperature detection module comprises a temperature sensor.
6. The vehicle-mounted interphone with over-temperature protection as claimed in claim 1, 2 or 3, wherein: the vehicle-mounted interphone further comprises a second power supply module which is connected between the power supply and the input end of the control module in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022783129.8U CN213693136U (en) | 2020-11-26 | 2020-11-26 | Vehicle-mounted interphone with over-temperature protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022783129.8U CN213693136U (en) | 2020-11-26 | 2020-11-26 | Vehicle-mounted interphone with over-temperature protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213693136U true CN213693136U (en) | 2021-07-13 |
Family
ID=76736122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022783129.8U Active CN213693136U (en) | 2020-11-26 | 2020-11-26 | Vehicle-mounted interphone with over-temperature protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213693136U (en) |
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2020
- 2020-11-26 CN CN202022783129.8U patent/CN213693136U/en active Active
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