CN205921363U - Direct current overvoltage protection system of on -vehicle refrigerator - Google Patents
Direct current overvoltage protection system of on -vehicle refrigerator Download PDFInfo
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- CN205921363U CN205921363U CN201620664110.2U CN201620664110U CN205921363U CN 205921363 U CN205921363 U CN 205921363U CN 201620664110 U CN201620664110 U CN 201620664110U CN 205921363 U CN205921363 U CN 205921363U
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- circuit
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- direct current
- control circuit
- protection system
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- 238000001514 detection method Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 230000000052 comparative effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
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Abstract
The utility model discloses a direct current overvoltage protection system of on -vehicle refrigerator, including car direct current output interface, overvoltage crowbar board and compressor control module, be equipped with ON -OFF control circuit, voltage detection circuit and voltage comparison circuit on the overvoltage crowbar board, car direct current output interface is connected with ON -OFF control circuit, voltage detection circuit's input respectively, and ON -OFF control circuit's output is connected with compressor control module, and voltage detection circuit's output is connected with voltage comparison circuit, ON -OFF control circuit in proper order, the utility model discloses direct current overvoltage protection system of on -vehicle refrigerator passes through voltage detection circuit and gathers voltage signal, and voltage detection circuit transmits voltage signal to voltage comparison circuit and carries out the comparison, and voltage comparison circuit's judged result drive switch control circuit's break -make effectually prevents car direct current output interface from to produce in the twinkling of an eye when the power supply high voltage burns out mobile unit, has played the effect of protection.
Description
Technical field
This utility model is related to over-voltage protection technology field, the DC over-voltage protection system of particularly a kind of car refrigerator.
Background technology
With the raising of expanding economy and people's living standard, the pursuit also more and more higher to quality of life for the people, car
Carry refrigerator to arise at the historic moment；Car refrigerator refers to the refrigerator that can carry on automobile, and car refrigerator is international city in recent years
Popular refrigeration of new generation, cooling apparatus on field.In prior art, automobile direct current output interface can produce moment in power supply
High voltage, its voltage peak, more than 100v, can burn mobile unit, or even the safety threatening occupant.
Utility model content
The purpose of this utility model is to provide a kind of the straight of the car refrigerator that structure is simple, easy to use, reliability is high
Stream overvoltage protective system.
The technical solution realizing this utility model purpose is:
A kind of DC over-voltage protection system of car refrigerator is it is characterised in that include automobile direct current output interface, overvoltage is protected
Protection circuit plate and compressor control module, described overvoltage crowbar plate is provided with ON-OFF control circuit, voltage detecting circuit
And voltage comparator circuit；Described automobile direct current output interface is connected with the input of ON-OFF control circuit, meanwhile, automobile direct current
Output interface is connected with the input of voltage detecting circuit, and the outfan of ON-OFF control circuit is connected with compressor control module
Connect, the outfan of voltage detecting circuit is connected with the input of voltage comparator circuit, the outfan of voltage comparator circuit with open
The control end closing control circuit is connected.
Preferably, described overvoltage crowbar plate is provided with delay circuit, described automobile direct current output interface and time delay
The input of circuit is connected, and the outfan of delay circuit is connected with the input of ON-OFF control circuit.
Preferably, described overvoltage crowbar plate is provided with warning circuit, described warning circuit and voltage comparator circuit
It is connected.
Preferably, described ON-OFF control circuit is mos pipe ON-OFF control circuit or relay switch control circuit.
This utility model compared with prior art, its remarkable advantage:
(1) the DC over-voltage protection system of this utility model car refrigerator passes through voltage detecting circuit collection voltages signal,
Voltage signal is transmitted and is compared to voltage comparator circuit by voltage detecting circuit, and the judged result of voltage comparator circuit drives to be opened
Close the break-make of control circuit, effectively prevent automobile direct current output interface from producing instant high-voltage in power supply and burn vehicle-mounted setting
Standby, serve the effect of protection.
(2) the DC over-voltage protection system of this utility model car refrigerator passes through delay circuit to automobile direct current output interface
Output signal enter line delay, improve the stability of DC over-voltage protection system.
(3) the DC over-voltage protection system of this utility model car refrigerator is connected with voltage comparator circuit using warning circuit
Connect, when in voltage comparator circuit, voltage signal is more than setting value, warning circuit sends warning, points out occupant.
Below in conjunction with the accompanying drawings this utility model is described in further detail.
Brief description
Fig. 1 is the structural representation of the DC over-voltage protection system of this utility model car refrigerator.
Specific embodiment
Embodiment 1:
As shown in figure 1,
A kind of DC over-voltage protection system of car refrigerator, including automobile direct current output interface, overvoltage crowbar plate and
Compressor control module, described overvoltage crowbar plate is provided with ON-OFF control circuit, voltage detecting circuit and voltage ratio relatively
Circuit；Described automobile direct current output interface is connected with the input of ON-OFF control circuit, meanwhile, automobile direct current output interface with
The input of voltage detecting circuit is connected, and the outfan of ON-OFF control circuit is connected with compressor control module, and voltage is examined
The outfan of slowdown monitoring circuit is connected with the input of voltage comparator circuit, the outfan of voltage comparator circuit and ON-OFF control circuit
Control end be connected；Wherein, described voltage detecting circuit is used for detecting current voltage, every δ t time detecting magnitude of voltage, will
Voltage signal delivers to voltage comparator circuit.
Delay circuit is provided with described overvoltage crowbar plate, described automobile direct current output interface is defeated with delay circuit
Enter end to be connected, the outfan of delay circuit is connected with the input of ON-OFF control circuit.
It is provided with warning circuit, described warning circuit is connected with voltage comparator circuit on described overvoltage crowbar plate.
Described ON-OFF control circuit is mos pipe ON-OFF control circuit or relay switch control circuit.
The operation principle of the DC over-voltage protection system of this utility model car refrigerator:
Voltage detecting circuit is responsible for detection and sample input voltage values, and magnitude of voltage is sent to voltage comparator circuit carries out
Relatively；When voltage comparator circuit judges that voltage is higher than setting value or judges that rate of voltage rise is more than setting within a certain short time
During value, voltage comparator circuit can will determine that result delivers to ON-OFF control circuit, after ON-OFF control circuit receives this judged result
To be gone off by conducting, now compressor control module will be cut off the electricity supply, serve the effect of protection.
Voltage comparator circuit: compare in real time, whether the current voltage of testing circuit is electric more than the setting of voltage comparator circuit
Pressure；Compare in advance, the magnitude of voltage of the testing circuit changing value within the δ t time whether more than the setting value of voltage comparator circuit,
One of comparative result judges to set up, you can sends instructions to ON-OFF control circuit disconnecting circuit and connects.
In sum, the DC over-voltage protection system of this utility model car refrigerator passes through voltage detecting circuit collection voltages
Signal, voltage signal is transmitted and is compared to voltage comparator circuit by voltage detecting circuit, the judged result of voltage comparator circuit
The break-make of driving switch control circuit, effectively prevents automobile direct current output interface from producing instant high-voltage in power supply and burns car
Load equipment, serves the effect of protection.The DC over-voltage protection system of this utility model car refrigerator passes through delay circuit to vapour
The output signal of car direct current output interface enters line delay, improves the stability of DC over-voltage protection system.This utility model car
The DC over-voltage protection system carrying refrigerator is connected with voltage comparator circuit using warning circuit, when voltage in voltage comparator circuit
When signal is more than setting value, warning circuit sends warning, points out occupant.
Claims (4)
1. a kind of DC over-voltage protection system of car refrigerator is it is characterised in that include automobile direct current output interface, overvoltage protection
Circuit board and compressor control module, described overvoltage crowbar plate is provided with ON-OFF control circuit, voltage detecting circuit and
Voltage comparator circuit；Described automobile direct current output interface is connected with the input of ON-OFF control circuit, and meanwhile, automobile direct current is defeated
Outgoing interface is connected with the input of voltage detecting circuit, and the outfan of ON-OFF control circuit is connected with compressor control module
Connect, the outfan of voltage detecting circuit is connected with the input of voltage comparator circuit, the outfan of voltage comparator circuit with open
The control end closing control circuit is connected.
2. the DC over-voltage protection system of car refrigerator according to claim 1 is it is characterised in that described overvoltage protection is electric
Delay circuit is provided with the plate of road, described automobile direct current output interface is connected with the input of delay circuit, delay circuit
Outfan is connected with the input of ON-OFF control circuit.
3. the DC over-voltage protection system of car refrigerator according to claim 1 is it is characterised in that described overvoltage protection is electric
It is provided with warning circuit, described warning circuit is connected with voltage comparator circuit on the plate of road.
4. the DC over-voltage protection system of car refrigerator according to claim 1 is it is characterised in that described on-off control is electric
Road is mos pipe ON-OFF control circuit or relay switch control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620664110.2U CN205921363U (en) | 2016-06-29 | 2016-06-29 | Direct current overvoltage protection system of on -vehicle refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620664110.2U CN205921363U (en) | 2016-06-29 | 2016-06-29 | Direct current overvoltage protection system of on -vehicle refrigerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205921363U true CN205921363U (en) | 2017-02-01 |
Family
ID=57875046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620664110.2U Active CN205921363U (en) | 2016-06-29 | 2016-06-29 | Direct current overvoltage protection system of on -vehicle refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205921363U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108646626A (en) * | 2018-05-31 | 2018-10-12 | 佛吉亚好帮手电子科技有限公司 | A kind of mobile unit control signal transmission protection system |
-
2016
- 2016-06-29 CN CN201620664110.2U patent/CN205921363U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108646626A (en) * | 2018-05-31 | 2018-10-12 | 佛吉亚好帮手电子科技有限公司 | A kind of mobile unit control signal transmission protection system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No. 23 Jiankang Road, Torch Development Zone, Zhongshan City, Guangdong Province, 528400 Patentee after: Indre Industries (Guangdong) Co.,Ltd. Country or region after: China Address before: No. 23 Jiankang Road, Health Base, Torch Development Zone, Zhongshan City, Guangdong Province, 528400 Patentee before: GUANGDONG INDEL B ENTERPRISE Co.,Ltd. Country or region before: China |