CN201741045U - Control circuit of proportional valve - Google Patents
Control circuit of proportional valve Download PDFInfo
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- CN201741045U CN201741045U CN2010201043815U CN201020104381U CN201741045U CN 201741045 U CN201741045 U CN 201741045U CN 2010201043815 U CN2010201043815 U CN 2010201043815U CN 201020104381 U CN201020104381 U CN 201020104381U CN 201741045 U CN201741045 U CN 201741045U
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Abstract
The utility model relates to a control circuit of a proportional valve for controlling ventilation flow rate of the proportional valve V1 in a valve interface circuit, which comprises a processing and converting circuit and a reference voltage regulating circuit, as well as a driving circuit, a protecting circuit and a current detecting circuit, wherein the driving circuit is connected with the reference voltage regulating circuit and used for providing reference driving current according to reference voltage, the protecting circuit is connected with the driving circuit, and the current detecting circuit is connected with the driving circuit and used for monitoring driving current and converting the driving current into voltage for collection. The control circuit of the proportional valve can dynamically regulate the flow rate, effectively control the ventilation flow rate and improve the reliability and the safety of a machine.
Description
[technical field]
The utility model relates to the control circuit of medicine equipment, relates in particular to a kind of Proportion valve controlling circuit.
[background technology]
At present, the medical electronics product is lung ventilator and Anesthesia machine for example, is severe case's important salvage tool, and is more and more general in clinical practice, how to improve the reliability and the security of ventilation, to clinical significant.Lung ventilator and Anesthesia machine mainly are made up of gas circuit structure and electrical control two large divisions, gas circuit structure provides the patient respiration gas flow loop, electric control system provides the driving of device parts such as valve, sensor, and the extraction of the sensor signal of parameter monitoring handled, thereby realize adjusting and monitoring, to reach the purpose that appropriate airshed is provided to patient to airshed.
Present most of machine adopts proportioning valve, realization is to the adjusting of airshed, the principle device of this method Control Flow as shown in Figure 6, this device comprises to be handled and change-over circuit 110, reference voltage regulating circuit 120, driving circuit 130, valve interface circuit 140 and drive current testing circuit 150.Handle and change-over circuit 110 output predeterminated voltages, this voltage is processed into a reference voltage through reference voltage regulating circuit 120, the size of this reference voltage determined the to flow through size of current of proportioning valve V1 in the valve interface circuit 140, the size of current of proportioning valve V1 of flowing through has determined valve opening, and then the flow through airshed of valve of control, realize control to flow.And the release electric current of inductive load valve of diode D1 in the valve interface circuit 140 plays the afterflow protective effect.Drive current testing circuit 150 detects the size of the drive current of valve, converts the drive current of valve to voltage, gives ADC and gathers and analyzing and processing, and then judge the duty of valve, provides reference process, for example reports to the police etc.
This circuit is only realized the dynamic adjustments of flow, lacks the abnormal protection measure.Such as: if the negative supply of the amplifier U1B that driving circuit 130 comprises (VCC) breaks for a certain reason, analysis circuit is easily known, the grid of driving tube Q1 (end that connects resistance R 5) is in high level all the time, driving tube Q1 is in conducting state (test shows it also is like this), the corresponding power supply open mode that is in of valve V1 always.At this moment, the reference voltage of processor output does not have control action, and airshed is in runaway condition, if this valve V1 controls to patient ventilating, then air-flow can stop far from into patient lung, will damage patient.Thereby from the consideration of ventilation security standpoint, this circuit arrangement does not play the security protection effect.
Prior art need to be improved and enhanced.
[utility model content]
The technical problems to be solved in the utility model provides and a kind ofly can effectively improve the Proportion valve controlling circuit of security.
The utility model provides a kind of Proportion valve controlling circuit, ventilation flow rate to the proportioning valve V1 in the valve interface circuit is controlled, comprise processing and change-over circuit and reference voltage regulating circuit, the digital quantity voltage that this processing and change-over circuit send also is converted into analog quantity voltage, this analog quantity voltage is sent to the reference voltage regulating circuit, be adjusted to reference voltage, also comprise: driving circuit, be connected in the reference voltage regulating circuit, provide reference drive current according to reference voltage, comprise operational amplifier U1B, resistance R 5 and driving tube Q1, resistance R 5 are connected between the grid of the output terminal of operational amplifier U1B and driving tube Q1; Holding circuit is connected in driving circuit, comprises diode D2, the plus earth of diode D2, negative pole connection processing device, the signal S of receiving processor; Current detection circuit is connected in driving circuit, and drive current is monitored, and drive current is converted into voltage collection, comprises computing
Amplifier U1C, operational amplifier U1D and resistance R 7, resistance R 7 are connected between the in-phase input end of the source electrode of driving tube Q1 and operational amplifier U1C.
As further improvement of the utility model, this Proportion valve controlling circuit also comprises flow detection circuit and flow sensor, and wherein the flow detection circuit is connected in the valve interface circuit, and flow sensor is connected between flow detection circuit and processing and the change-over circuit.
As further improvement of the utility model, driving circuit also comprises resistance R 6, is connected between the source electrode and ground of described driving tube Q1.
As further improvement of the utility model, also comprise air flue pipeline and flow sensor, wherein the air flue pipeline is connected in the valve interface circuit, and flow sensor one end is connected in the air flue pipeline, and the other end is connected in described processing and change-over circuit.
As further improvement of the utility model, described holding circuit is connected between described driving circuit and the described valve interface circuit.
As further improvement of the utility model, this driving circuit can also comprise capacitor C 3 and capacitor C 4, capacitor C 3 is deglitch electric capacity with capacitor C 4, and capacitor C 3 is connected between the drain electrode and grid of driving tube Q1, and capacitor C 4 is connected between the grid and ground of driving tube Q1.
As further improvement of the utility model, this driving circuit can also comprise capacitor C 4, and capacitor C 4 is a deglitch electric capacity, is connected between the drain electrode and ground of driving tube Q1.
As further improvement of the utility model, this holding circuit also comprises relay K 1, and its first input control end is connected in the source electrode of driving tube Q1, and the second input control end is connected in operation valve V1.
As further improvement of the utility model; described holding circuit also comprises relay K 1; its first input control end is connected in the drain electrode of described driving tube Q1; the second input control end is connected in described operation valve V1; first output terminal is connected in the positive pole of described diode D2, and second output terminal is connected in the negative pole of described diode D2.
As further improvement of the utility model, described holding circuit is connected between the source electrode and resistance R 6 of described driving tube Q1.
As further improvement of the utility model, described driving circuit also comprises capacitor C 3 and capacitor C 4, described capacitor C 3 is deglitch electric capacity with capacitor C 4, and wherein capacitor C 3 is connected between the drain electrode and resistance R 7 of described driving tube Q1, and capacitor C 4 is connected between resistance R 7 and the ground.
As further improvement of the utility model; described holding circuit also comprises relay K 1; its first input control end is connected in the source electrode of described driving tube Q1; the second input control end is connected in described resistance R 6; first output terminal is connected in the positive pole of described diode D2, and second output terminal is connected in the negative pole of described diode D2.
The present invention's beneficial effect compared with prior art is:
When (1) the present invention adopts holding circuit to break down in system, can in time block proportioning valve, improve the security of equipment;
(2) the present invention effectively controls ventilation flow rate by the dynamic adjustments of holding circuit realization to flow;
(3) the present invention protects driving tube Q1 by spike electric capacity in driving circuit, improves the reliability and the security of machine.
[description of drawings]
Fig. 1 is the circuit diagram of the utility model Proportion valve controlling circuit;
Fig. 2 is the circuit diagram of first kind of embodiment of the utility model Proportion valve controlling circuit;
Fig. 3 is the circuit diagram of second kind of embodiment of the utility model Proportion valve controlling circuit;
Fig. 4 is the circuit diagram of the third embodiment of the utility model Proportion valve controlling circuit;
Fig. 5 is the circuit diagram of the utility model Proportion valve controlling circuit prior art.
[embodiment]
Be described in further detail below in conjunction with accompanying drawing and embodiment of the present utility model.
Be the circuit diagram of the utility model Proportion valve controlling circuit as shown in Figure 1.Proportion valve controlling circuit comprises to be handled and change-over circuit 110, reference voltage regulating circuit 120, driving circuit 130, valve interface circuit 140, current detection circuit 150 and holding circuit 160.Wherein, handle with change-over circuit 110 and comprise processor and analog to digital conversion circuit; one end of reference voltage regulating circuit 120 is connected in to be handled and change-over circuit 110; the other end is connected in driving circuit 130, and valve interface circuit 140, current detection circuit 150 all are electrically connected with this driving circuit 130 with holding circuit 160.
Wherein, the processor of processing and change-over circuit 110 sends default digital quantity voltage, converts analog quantity to through analog to digital conversion circuit.Analog quantity is adjusted to reference voltage through reference voltage regulating circuit 120.Driving circuit 130 is the flow through drive current of valve interface circuit 140 and then the aperture of control ratio valve V1 of control according to this reference voltage.
In addition, this Proportion valve controlling circuit also comprises air flue pipeline 170 and flow sensor 180.Air flue pipeline 170 connects valve interface circuit 140, and an end of flow sensor 170 is connected in to be handled and change-over circuit 110, and the other end is connected in air flue pipeline 170.Wherein, the size of proportioning valve V1 aperture has determined the flow size of air flue pipeline 170, and flow sensor 180 detects patient airway loop airshed, gives processor with testing result.Whole process is a closed loop, and processor is by predeterminated voltage, and certain flow is exported in control earlier, and driving circuit 130 is regulated the aperture of proportioning valve V1 according to the flow size, and then realizes the accurate control of flow.Current detection circuit 150 is responsible for the duty of detection ratio valve V1, when appearance is unusual, provides warning message.If when taking place unusually, the reference voltage that processor is exported is uncontrollable, and then holding circuit 160 is blocked driving circuit 130 by force, intercepts hardware fault is caused unusual ventilation, guarantees the security of ventilating.
Be the circuit diagram of first kind of embodiment of the utility model Proportion valve controlling circuit as shown in Figure 2.Proportion valve controlling circuit is controlled the ventilation flow rate of the proportioning valve V1 in the valve interface circuit 140, comprises handling and change-over circuit 110, reference voltage regulating circuit 120, driving circuit 130, holding circuit 160 and current detection circuit 150.Wherein, valve interface circuit 140 comprises driving power+VCC, proportioning valve V1 and inductive load sustained diode 1, and this circuit provides valve interface and afterflow protection.Handle with change-over circuit 110 and comprise processor and analog to digital conversion circuit, the predeterminated voltage of driving circuit 130 is provided, the signal of current monitoring circuit is carried out acquisition process, and holding circuit 160 is controlled.The digital quantity voltage that this processing and change-over circuit 110 send also is converted into analog quantity voltage, and this analog quantity voltage is sent to reference voltage regulating circuit 120, is adjusted to reference voltage, and wherein, reference voltage regulating circuit 120 mainly plays the convergent-divergent effect.
Be the circuit diagram of second kind of embodiment of the utility model Proportion valve controlling circuit as shown in Figure 3.The difference of present embodiment and first kind of embodiment shown in Figure 2 is that driving circuit 130 comprises operational amplifier U1B, resistance R 4, resistance R 5, resistance R 6, capacitor C 2 and driving tube Q1.Also comprise capacitor C 4, capacitor C 4 is a deglitch electric capacity, is connected between the drain electrode and ground of driving tube Q1.Current detection circuit 150 uses the Butterworth filtering circuit, and has increased the clamping protection circuit.The control signal of holding circuit 160 is a negative logic signal.
Be the circuit diagram of the third embodiment of the utility model Proportion valve controlling circuit as shown in Figure 4.The difference of present embodiment and first kind of embodiment shown in Figure 2 is; holding circuit 160 is connected between the source electrode and resistance R 6 of driving tube Q1; the first input control end of its relay K 1 is connected in the source electrode of driving tube Q1; the second input control end is connected in resistance R 6; first output terminal is connected in the positive pole of diode D2, and second output terminal is connected in the negative pole of diode D2.
Proportion valve controlling circuit provided by the utility model; by the dynamic adjustments of holding circuit realization to flow; effectively control ventilation flow rate; and driving tube Q1 is protected by spike electric capacity; improve the reliability and the security of machine; it is higher to have solved in the prior art shown in Figure 5 driving tube Q1 spoilage, and lacks the problem to the abnormal protection outside the dynamic adjustments that realizes flow.
Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be considered as belonging to protection domain of the present utility model.
Claims (10)
1. Proportion valve controlling circuit, ventilation flow rate to the proportioning valve V1 in the valve interface circuit is controlled, comprise processing and change-over circuit and reference voltage regulating circuit, the digital quantity voltage that this processing and change-over circuit send also is converted into analog quantity voltage, this analog quantity voltage is sent to the reference voltage regulating circuit, be adjusted to reference voltage, it is characterized in that, also comprise:
Driving circuit, be connected in described reference voltage regulating circuit, provide reference drive current according to described reference voltage, comprise operational amplifier U1B, resistance R 5 and driving tube Q1, resistance R 5 is connected between the grid of the output terminal of described operational amplifier U1B and driving tube Q1;
Holding circuit is connected in described driving circuit, comprises diode D2, the plus earth of described diode D2, and negative pole connects described processor, the signal S of receiving processor;
Current detection circuit, be connected in described driving circuit, described drive current is monitored, described drive current is converted into voltage collection, comprise operational amplifier U1C, operational amplifier U1D and resistance R 7, resistance R 7 is connected between the in-phase input end of the source electrode of described driving tube Q1 and described operational amplifier U1C.
2. Proportion valve controlling circuit according to claim 1 is characterized in that: described driving circuit also comprises resistance R 6, is connected between the source electrode and ground of described driving tube Q1.
3. Proportion valve controlling circuit according to claim 2, it is characterized in that: also comprise air flue pipeline and flow sensor, wherein the air flue pipeline is connected in the valve interface circuit, and flow sensor one end is connected in the air flue pipeline, and the other end is connected in described processing and change-over circuit.
4. Proportion valve controlling circuit according to claim 3 is characterized in that: described holding circuit is connected between described driving circuit and the described valve interface circuit.
5. Proportion valve controlling circuit according to claim 4, it is characterized in that: described driving circuit also comprises capacitor C 3 and capacitor C 4, described capacitor C 3 is deglitch electric capacity with capacitor C 4, described capacitor C 3 is connected between the drain electrode and grid of described driving tube Q1, and described capacitor C 4 is connected between the grid and ground of described driving tube Q1.
6. Proportion valve controlling circuit according to claim 4 is characterized in that: described driving circuit also comprises capacitor C 4, and described capacitor C 4 is a deglitch electric capacity, is connected between the drain electrode and ground of described driving tube Q1.
7. according to claim 5 or 6 described Proportion valve controlling circuits; it is characterized in that: described holding circuit also comprises relay K 1; its first input control end is connected in the drain electrode of described driving tube Q1; the second input control end is connected in described operation valve V1; first output terminal is connected in the positive pole of described diode D2, and second output terminal is connected in the negative pole of described diode D2.
8. Proportion valve controlling circuit according to claim 3 is characterized in that: described holding circuit is connected between the source electrode and resistance R 6 of described driving tube Q1.
9. Proportion valve controlling circuit according to claim 8, it is characterized in that: described driving circuit also comprises capacitor C 3 and capacitor C 4, described capacitor C 3 is deglitch electric capacity with capacitor C 4, wherein capacitor C 3 is connected between the drain electrode and resistance R 7 of described driving tube Q1, and capacitor C 4 is connected between resistance R 7 and the ground.
10. Proportion valve controlling circuit according to claim 9; it is characterized in that: described holding circuit also comprises relay K 1; its first input control end is connected in the source electrode of described driving tube Q1; the second input control end is connected in described resistance R 6; first output terminal is connected in the positive pole of described diode D2, and second output terminal is connected in the negative pole of described diode D2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201043815U CN201741045U (en) | 2010-01-26 | 2010-01-26 | Control circuit of proportional valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201043815U CN201741045U (en) | 2010-01-26 | 2010-01-26 | Control circuit of proportional valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201741045U true CN201741045U (en) | 2011-02-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201043815U Expired - Fee Related CN201741045U (en) | 2010-01-26 | 2010-01-26 | Control circuit of proportional valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201741045U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103187871A (en) * | 2011-12-30 | 2013-07-03 | 北京谊安医疗系统股份有限公司 | Power supply control device of magnetic valve flow in anaesthesia machine and method thereof |
| CN104421477A (en) * | 2013-09-03 | 2015-03-18 | 北京谊安医疗系统股份有限公司 | Proportional valve control device used for anesthesia machine |
| CN105571846A (en) * | 2015-12-16 | 2016-05-11 | 宁波宝新不锈钢有限公司 | Portable electro-hydraulic proportional valve fault diagnostic instrument |
-
2010
- 2010-01-26 CN CN2010201043815U patent/CN201741045U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103187871A (en) * | 2011-12-30 | 2013-07-03 | 北京谊安医疗系统股份有限公司 | Power supply control device of magnetic valve flow in anaesthesia machine and method thereof |
| CN103187871B (en) * | 2011-12-30 | 2016-04-20 | 北京谊安医疗系统股份有限公司 | The power control of electromagnetically operated valve flow and method in a kind of Anesthesia machine |
| CN104421477A (en) * | 2013-09-03 | 2015-03-18 | 北京谊安医疗系统股份有限公司 | Proportional valve control device used for anesthesia machine |
| CN105571846A (en) * | 2015-12-16 | 2016-05-11 | 宁波宝新不锈钢有限公司 | Portable electro-hydraulic proportional valve fault diagnostic instrument |
| CN105571846B (en) * | 2015-12-16 | 2018-06-26 | 宁波宝新不锈钢有限公司 | A kind of portable electro-hydraulic proportional valve failure diagnostic apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110209 Termination date: 20180126 |