CN109779738A - A kind of expansion tank with liquid level warning function - Google Patents
A kind of expansion tank with liquid level warning function Download PDFInfo
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- CN109779738A CN109779738A CN201910068526.6A CN201910068526A CN109779738A CN 109779738 A CN109779738 A CN 109779738A CN 201910068526 A CN201910068526 A CN 201910068526A CN 109779738 A CN109779738 A CN 109779738A
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- signal
- liquid level
- expansion tank
- warning function
- capacitor
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Abstract
The present invention relates to a kind of expansion tanks with liquid level warning function, including expansion tank ontology, are equipped with warning metal line；Signal input unit, for providing different voltage input signals to signal processing unit according to the intrinsic liquid level of the expansion tank；Signal processing unit is electrically connected with the signal input unit, controls transmission alarm signal for judging whether the voltage value received in some cycles is all larger than predetermined voltage threshold, and according to judging result.Implement a kind of expansion tank with liquid level warning function of the invention, monitoring of the personnel to expansion tank ontology liquid level can be reduced, to reduce the consumption of personnel time and energy, and reduces the occurrence probability of cooling system failure.
Description
Technical field
The present invention relates to vehicle expansion tank, in particular to a kind of expansion tank with liquid level warning function.
Background technique
When engine operation, a large amount of heat can be generated, in order to enable correlated parts steady operation under high temperature and pressure,
Engine must distribute extra heat, and automobile cooling system is used to distribute extra heat, guarantee to start
Machine works under optimum state of temperature, cooling system includes radiator, fan, expansion tank etc., wherein expansion tank
Effect is that when water temperature increases, storage is due to extra coolant liquid caused by expanding, when coolant liquid is damaged in cooling system cyclic process
Time-consuming in time supplements coolant liquid.
In order to guarantee the amount of liquid of coolant liquid in expansion tank, when liquid level reaches alert locations in expansion tank, just must
Driver must be reminded to supplement coolant liquid in time.But existing expansion tank lacks liquid level warning unit, needs driver or maintenance
Maintenance personnel periodically checks, when not only expending the time and efforts of personnel in this way, but also being negligent of monitoring because of personnel's reason, it is easy to
Make the liquid level of expansion tank lower than alert locations, so as to cause cooling system of vehicle failure.
Summary of the invention
In view of the above problems in the prior art, the purpose of the present invention is to provide a kind of expansions with liquid level warning function
Kettle to reduce the consumption of personnel time and energy, and is reduced with reducing monitoring of the personnel to expansion tank ontology liquid level
The occurrence probability of cooling system failure.
First aspect present invention provides a kind of expansion tank with liquid level warning function, including expansion tank ontology, if
There is warning metal line；Signal input unit, for being provided according to the intrinsic liquid level of the expansion tank to signal processing unit
Different voltage input signals；Signal processing unit is electrically connected with the signal input unit, for judging that some cycles are inscribed
Whether the voltage value received is all larger than predetermined voltage threshold, and is controlled according to judging result and send alarm signal；The signal is defeated
Entering unit includes: signal generator, for issuing square-wave signal；First capacitor is electrically connected with the signal generator；Condenser type
Liquid level sensor, including two electrodes, two electrodes are set at the intrinsic warning metal line of the expansion tank, and
One electrode of the capacitance level transducer is electrically connected with the first capacitor, the capacitance level transducer it is another
A electrode ground connection.
Further, the signal input circuit further includes first resistor, and described first resistor one end and the signal are sent out
The output end electrical connection of raw device, the other end are electrically connected with the first capacitor and the signal processing unit respectively.
Further, the signal processing unit includes that signal receives processor, the signal receive processor with it is described
The series circuit of first capacitor and capacitance level transducer is in parallel.
Further, it includes: signal judgment module that the signal, which receives processor, for judge to receive in some cycles
Whether voltage value is all larger than predetermined voltage threshold, when the voltage value of receiving is all larger than predetermined voltage threshold, then triggers warning device
Control module；Warning device control module sends alarm signal for controlling.
Further, the signal processing unit further includes the second capacitor, at second capacitor and the signal receiving
It is in parallel to manage device.
Further, the signal processing unit further includes second resistance, and described second resistance one end and the signal are defeated
Enter unit electrical connection, the other end receives processor with second capacitor and signal respectively and is electrically connected.
Further, the capacitance level transducer is PIN needle formula sensor.
Further, it is 5V that the signal generator, which issues the voltage of signal, and frequency is more than or equal to 10Hz, and duty ratio is
1%.
Further, the expansion tank further includes warning device, and the warning device and the warning device control mould
Block electrical connection, for sending alarm signal to driver.
Further, the warning device is one of display screen, light alarming device or audible alarm unit or several
Kind.
Due to above-mentioned technical proposal, the expansion tank with liquid level warning function of the invention is had the following beneficial effects:
The function of realizing liquid level in real-time detection expansion tank ontology, when liquid level is lower than warning liquid level line, from trend
Driver initiates alarm, avoids the cooling system failure as caused by coolant liquid deficiency；
Within a certain period, when collected signal, which is all satisfied, to be required, alarm is just initiated, vehicle liquid fluctuating is avoided
The false alarm of formation.
Detailed description of the invention
It, below will be to required in embodiment or description of the prior art in order to illustrate more clearly of technical solution of the present invention
The attached drawing used is briefly described.It should be evident that drawings in the following description are only some embodiments of the invention, it is right
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings
Its attached drawing.
Fig. 1 is a kind of circuit diagram of expansion tank with liquid level warning function of the invention；
Fig. 2 is the enlarged drawing in Fig. 1 at A；
Fig. 3 is a kind of voltage signal figure of expansion tank with liquid level warning function of the invention.
In attached drawing:
1- expansion tank ontology 2- signal input unit 21- signal generator
3- signal processing unit 31- signal receives processor
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The model that the present invention protects all should belong in member's every other embodiment obtained without making creative work
It encloses.
It should be noted that term " first ", " second " etc. in description and claims of this specification and attached drawing
It is to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that the number used in this way
According to being interchangeable under appropriate circumstances, so that the embodiment of the present invention described herein can be in addition to illustrating herein or describing
Those of other than sequence implement.In addition, term " includes " and " having " and their any deformation, it is intended that covering is not
Exclusive includes.
Embodiment one
As shown in Figure 1 and Figure 2, the embodiment of the present invention one provides a kind of swelling water with liquid level warning function
Pot, including expansion tank ontology 1, signal input unit 2 and signal processing unit 3, the expansion tank ontology 1 are equipped with warning liquid
Upper thread, the signal input unit 2 are used to be provided not according to the liquid level in the expansion tank ontology 1 to signal processing unit 3
Same voltage input signal, the signal processing unit 3 is electrically connected with the signal input unit 2, for judging some cycles
Whether the voltage value of interior receiving is all larger than predetermined voltage threshold, and is controlled according to judging result and send alarm signal.
The signal input unit 2 includes that signal generator 21, first resistor R1, first capacitor C1 and capacitance type liquid level pass
Sensor, the signal generator 21 is for issuing square-wave signal, in some possible embodiments, the signal generator 21
The voltage of the square-wave signal of sending is 5V (being powered by main relay), and frequency is more than or equal to 10Hz, duty ratio 1%, the frequency
Rate and duty ratio are adjustable, use duty ratio for 1% square-wave signal, there is reduction energy consumption, reduce electrolysis and the area of coolant liquid
Divide the function of other signals；The first resistor R1 is electrically connected with the output end of the signal generator 21, the first resistor
R1 is pull-up resistor, plays the square-wave signal clamper of sender unit sending to high level, reduces circuital current and reduction
The effect of 3 power consumption of signal processing unit；The first capacitor C1 is electrically connected with the first resistor R1, the first capacitor
C1 is that signal processing unit 3 provides the basis of detection, in charge and discharge process, plays the process for delaying circuit discharging,
Preventing PIN needle is the effect of often electricity；The capacitance level transducer includes two electrodes, and two electrodes are set to described swollen
At warning metal line in swollen water kettle body 1, and an electrode of the capacitance level transducer and the first capacitor
C1 electrical connection, another electrode ground connection of the capacitance level transducer.Specifically, under normal circumstances, expansion tank ontology
Interior liquid level is higher than warning metal line or just flushes with warning metal line, and electrode submerges in liquid level completely, when liquid level is lower than warning
When liquid level line, electrode section expose, when liquid level as low as to a certain degree when, electrode is completely exposed.In some possible embodiments
In, the capacitance level transducer is PIN needle formula sensor.
The signal processing unit 3 includes that second resistance R2, the second capacitor C2 and signal receive processor 31, and described second
Node between resistance R2 and the first resistor R1 and first capacitor C1 is electrically connected, and the second resistance R2 has the second electricity of reduction
Hold the function of C2 interference；Described one end second capacitor C2 is electrically connected with the second resistance R2, other end ground connection, second electricity
Holding C2 plays the role of reducing electromagnetic interference and protects circuit；It is in parallel with the second capacitor C2 that the signal receives processor 31.
In some possible embodiments, it includes signal judgment module and warning device that the signal, which receives processor 31,
Control module, it is default that the signal judgment module is used to judge in some cycles whether the voltage value that (such as several seconds) receive to be all larger than
Voltage threshold then triggers warning device control module, the warning device when the voltage value of receiving is all larger than predetermined voltage threshold
Control module sends alarm signal for controlling.Its function is, when vehicle traveling is at bad road or climb and fall, avoid occurring due to
Cooling-liquid level fluctuation and caused by false alarm.
The expansion tank ontology 1 further includes warning device, the warning device and warning device control module electricity
Connection, for sending alarm signal to driver.In some possible embodiments, the warning device is display screen, lamp
One or more of light warning device or audible alarm unit.
Accordingly, when practical application, the expansion tank ontology 1 is provided with coolant liquid, when liquid level is normal, the coolant liquid
Height be greater than or equal to warning metal line, the PIN needle of PIN needle formula sensor submerges coolant liquid completely, inside coolant liquid
Contain Na+1、K+1Etc., therefore when PIN needle and coolant liquid contact, PIN needle formula sensor is powered, and first capacitor C1 is formed in short-term
Charge and discharge process, the signal processing unit 3 receive first voltage input signal V1, as shown in Fig. 3, since PIN needle is complete
It submerges entirely, the first voltage input signal V1It is less than normal；(cooling system is likely to occur when coolant liquid is seriously lower than warning metal line
Reduced after each related components of uniting leakage or coolant liquid normal consumption), PIN needle is completely exposed, and the PIN needle formula sensor is not
It is powered, the complete charge and discharge of first capacitor C1, the signal processing unit 3 receives second voltage input signal V2, such as 3 institute of attached drawing
Show, the second voltage input signal V2It is bigger than normal.
The alarm principle of the expansion tank is that the signal receives processor 31 equipped with predetermined voltage threshold, this voltage
Value is V3, set V1<V3<V2, when signal judgment module judges that the voltage value V received in some cycles is all larger than predeterminated voltage threshold
Value V3When, then warning device control module is triggered, the warning device control module controls the warning device and sends out to driver
Send sound or light warning signal.To avoid false alarm, (V can be set1+V2)/2≤V3<V2, which can be to circuit element
Deviation is evaded.
Only several embodiments of the present invention are expressed for above embodiments, and the description thereof is more specific and detailed, but can not
Therefore it is construed as limiting the scope of the patent.It should be pointed out that for those of ordinary skill in the art,
Under the premise of not departing from present inventive concept, various modifications and improvements can be made, and these are all within the scope of protection of the present invention.
Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of expansion tank with liquid level warning function characterized by comprising
Expansion tank ontology (1) is equipped with warning metal line；
Signal input unit (2), for being provided according to the liquid level in the expansion tank ontology (1) to signal processing unit (3)
Different voltage input signals；
Signal processing unit (3) is electrically connected, for judging the voltage received in some cycles with the signal input unit (2)
Whether value is all larger than predetermined voltage threshold, and is controlled according to judging result and send alarm signal；
The signal input unit (2) includes:
Signal generator (21), for issuing square-wave signal；
First capacitor C1 is electrically connected with the signal generator (21)；
Capacitance level transducer, including two electrodes, two electrodes are set to the warning in the expansion tank ontology (1)
At metal line, and an electrode of the capacitance level transducer is electrically connected with the first capacitor C1, the condenser type
Another electrode of liquid level sensor is grounded.
2. a kind of expansion tank with liquid level warning function according to claim 1, which is characterized in that the signal is defeated
Entering circuit further includes first resistor R1, and the one end the first resistor R1 is electrically connected with the output end of the signal generator (21),
The other end is electrically connected with the first capacitor C1 and the signal processing unit (3) respectively.
3. a kind of expansion tank with liquid level warning function according to claim 1, which is characterized in that at the signal
Managing unit (3) includes that signal receives processor (31), and the signal receives processor (31) and the first capacitor C1 and capacitor
The series circuit of formula liquid level sensor is in parallel.
4. a kind of expansion tank with liquid level warning function according to claim 3, which is characterized in that the signal connects
Included: by processor (31)
Signal judgment module works as receiving for judging whether the voltage value received in some cycles is all larger than predetermined voltage threshold
Voltage value be all larger than predetermined voltage threshold, then trigger warning device control module；
Warning device control module sends alarm signal for controlling.
5. a kind of expansion tank with liquid level warning function according to claim 3, which is characterized in that at the signal
Reason unit (3) further includes that with the signal to receive processor (31) in parallel by the second capacitor C2, the second capacitor C2.
6. a kind of expansion tank with liquid level warning function according to claim 3, which is characterized in that at the signal
Managing unit (3) further includes second resistance R2, and the one end the second resistance R2 is electrically connected with the signal input unit, the other end point
Do not receive processor (31) with the second capacitor C2 and signal to be electrically connected.
7. a kind of expansion tank with liquid level warning function according to claim 1, which is characterized in that the condenser type
Liquid level sensor is PIN needle formula sensor.
8. a kind of expansion tank with liquid level warning function according to claim 1, which is characterized in that the signal hair
The voltage that raw device (21) issue signal is 5V, and frequency is more than or equal to 10Hz, duty ratio 1%.
9. a kind of expansion tank with liquid level warning function according to claim 4, which is characterized in that the swelling water
Pot further includes warning device, and the warning device is electrically connected with the warning device control module, is reported for sending to driver
Alert signal.
10. a kind of expansion tank with liquid level warning function according to claim 9, which is characterized in that the alarm
Device is one or more of display screen, light alarming device or audible alarm unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910068526.6A CN109779738B (en) | 2019-01-24 | 2019-01-24 | Expansion kettle with liquid level alarming function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910068526.6A CN109779738B (en) | 2019-01-24 | 2019-01-24 | Expansion kettle with liquid level alarming function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109779738A true CN109779738A (en) | 2019-05-21 |
| CN109779738B CN109779738B (en) | 2021-04-13 |
Family
ID=66502431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910068526.6A Active CN109779738B (en) | 2019-01-24 | 2019-01-24 | Expansion kettle with liquid level alarming function |
Country Status (1)
| Country | Link |
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| CN (1) | CN109779738B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3322825A1 (en) * | 1983-06-24 | 1985-01-03 | Siemens AG, 1000 Berlin und 8000 München | Circuit arrangement for monitoring the level of electrically conductive fluids |
| JPH1194630A (en) * | 1997-09-17 | 1999-04-09 | Nitta Ind Corp | Level sensor |
| CN108759977A (en) * | 2018-04-27 | 2018-11-06 | 青岛海尔科技有限公司 | A kind of immersion detection device |
| CN108981850A (en) * | 2018-06-29 | 2018-12-11 | 宝沃汽车（中国）有限公司 | Detect method, apparatus, probe, liquid level sensor and the vehicle of coolant liquid liquid level |
-
2019
- 2019-01-24 CN CN201910068526.6A patent/CN109779738B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3322825A1 (en) * | 1983-06-24 | 1985-01-03 | Siemens AG, 1000 Berlin und 8000 München | Circuit arrangement for monitoring the level of electrically conductive fluids |
| JPH1194630A (en) * | 1997-09-17 | 1999-04-09 | Nitta Ind Corp | Level sensor |
| CN108759977A (en) * | 2018-04-27 | 2018-11-06 | 青岛海尔科技有限公司 | A kind of immersion detection device |
| CN108981850A (en) * | 2018-06-29 | 2018-12-11 | 宝沃汽车（中国）有限公司 | Detect method, apparatus, probe, liquid level sensor and the vehicle of coolant liquid liquid level |
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| Publication number | Publication date |
|---|---|
| CN109779738B (en) | 2021-04-13 |
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| TR01 | Transfer of patent right |
Effective date of registration: 20220402 Address after: 310051 No. 1760, Jiangling Road, Hangzhou, Zhejiang, Binjiang District Patentee after: ZHEJIANG GEELY HOLDING GROUP Co.,Ltd. Patentee after: Zhejiang liankong Technology Co., Ltd Address before: 318000 Chengdong gate head, Linhai City, Taizhou City, Zhejiang Province Patentee before: ZHEJIANG GEELY AUTOMOBILE RESEARCH INSTITUTE Co.,Ltd. Patentee before: Zhejiang Geely Holding Group Co., Ltd |
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