CN86205255U - Automatic negative pressure-regulating device - Google Patents
Automatic negative pressure-regulating device Download PDFInfo
- Publication number
- CN86205255U CN86205255U CN 86205255 CN86205255U CN86205255U CN 86205255 U CN86205255 U CN 86205255U CN 86205255 CN86205255 CN 86205255 CN 86205255 U CN86205255 U CN 86205255U CN 86205255 U CN86205255 U CN 86205255U
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- negative pressure
- voltage
- vacuum pump
- regulating device
- checking device
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Abstract
The utility model discloses an automatic negative pressure-regulating device which belongs to a medical care instrument. The position of the magnetic cores of an LC oscillator is controlled by negative pressure. The conversion of negative pressure-frequency-voltage is realized. A vacuum pump is controlled by a voltage comparator and a pumping rate control circuit to obtain desired stable negative pressure, and the negative pressure can be adjusted to a steady state or a relaxational state. When the negative pressure is at a steady state, light is emitted by a display circuit, and the light is used as the indication of the negative pressure. The automatic negative pressure-regulating device can be made as negative pressure therapeutic equipment which has the functions of curing hypertension, resting for overcoming fatigue and delaying aging, etc. The utility model can also be used as an aspirator, etc.
Description
This device belongs to medical health apparatus.
Usually, use the bigger vacuum pump of power and regulate steam leak-off valve to obtain required negative pressure, medical attractor is like this all just.The shortcoming of this mode, the one, negative pressure value changes with the leak rate of container, be difficult to stable negative pressure; The 2nd, manual adjustments air valve trouble needs the special messenger to be adjusted at any time; The 3rd, the waste energy; The 4th, show negative pressure with vacuum table, this is not very convenient for the people of old dim eyesight.
The purpose of this device is to provide a kind of robotization apparatus that obtains negative pressure to health care, and this apparatus can be automatically for the container with different volumes and leak rate provides required negative pressure, thereby has saved the inconvenience of manual adjustments.After required negative pressure reaches, will stop to bleed, perhaps bleed with the speed that equals leak rate, equipment thereby small and exquisite, power consumption is few, and noise also reduces greatly.When negative pressure reaches predetermined value, show that light can be bright, eyesight weak person also differentiates easily.This apparatus can also produce the negative pressure that is in the tension and relaxation state, selects for use during for health care.
The basic design of this device is, allows the magnetic core position of LC oscillator controlled by negative pressure, and only when negative pressure arrive desirable value, the output voltage of negative pressure---frequency---voltage conversion circuit ability was than the setting voltage height of voltage comparator, and vacuum pump is bled, intensified negative pressure.When negative pressure met or exceeded desirable value, vacuum pump then stopped to bleed.After, when negative pressure is reduced to gradually than desirable value hour, vacuum pump is bled again, is not less than desirable value up to negative pressure and just stops.Like this, just having kept negative pressure always is near the desirable value.Near the scope that negative pressure changes desirable value is elastic hysteresis and a retarded elasticity of utilizing spring, controls by the speed of exhaust of regulating vacuum pump again.When the speed of exhaust height of vacuum pump, negative pressure one rises and one falls, and is a kind of tension and relaxation state; When the speed of exhaust of vacuum pump was reduced to the leakage rate that equals container, it is constant that negative pressure maintains desirable value, is plateau.
Display circuit is also given in the output of negative pressure---frequency---voltage conversion circuit, so that negative pressure is when reaching predetermined value, and bright lamp.
Fig. 1 is the block scheme of this device.This device is by negative pressure sensing head 1, and negative pressure---frequency---voltage conversion circuit 2, voltage comparator 3, speed of exhaust control circuit 4, vacuum pump 5, display circuit 6 are formed.
Fig. 2 is the structural drawing of negative pressure sensing head 1.The inner chamber of skeleton 11 communicates with negative-pressure container by intercommunicating pore 10, sealed film 12 of the other end of inner chamber and isolated from atmosphere.One end of the magnetic core 8 in the inner chamber is close to diaphragm seal 12, and is inserted in just in the coil of wire 7.The other end of magnetic core 8 then is pressed on the spring 9.When negative pressure occurring in the inner chamber of skeleton 11, soft and whippy diaphragm seal 12 is passed to magnetic core 8 with atmospheric pressure almost undampedly, 8 compression springs 9 of magnetic core, and produce displacement together thereupon.Obviously, negative pressure is big more, and it is far away more that magnetic core 8 just leaves the coil of wire 7, and the inductance value of the coil of wire 7 is also just more little.Like this, the variation of negative pressure has converted the variation of inductance value to.
The inductance of the LC oscillator in negative pressure---frequency---the voltage transitions circuit 2 is provided by the coil of wire 7 in the negative pressure sensing head 1.So just realized the conversion of negative pressure to voltage, negative pressure is big more, and voltage is low more.Its medium frequency---voltage transitions is general common circuit.
The circuit of voltage comparator 3 is shown in Fig. 3.Transistor BG1, BG2, resistance R 1, R2, R3 constitute a differential amplifier.The difference of two transistorized collector voltages is added between the emitter and base stage of BG3 through resistance R 4.Voltage Vo on the collector resistance R5 of BG3 is the output voltage of comparer, and it is the result after the difference of two difference amplifier tube base voltage Vin and V γ ef is amplified.Obviously, when Vin＞V γ ef, Vo is just greater than zero, and during and Vin≤V γ ef, Vo equals zero.The output of Vin is exactly a negative pressure---frequency---voltage conversion circuit 2, so negative pressure value is during less than predetermined value, comparer output voltage V o is greater than zero, speed of exhaust control circuit 4 before the energy exciting vacuum pump, make vacuum pump work, and when negative pressure met or exceeded predetermined value, comparer output voltage V o equalled zero, and vacuum pump then quits work.
The circuit of speed of exhaust control circuit 4 is shown in Fig. 3.Transistor BG4, BG5, BG7, resistance R 6, R7 form amplifier, drive the motor D running of vacuum pump 5.Transistor BG6, potentiometer W, capacitor C constitutes a pressure regulation wave filter, and regulator potentiometer W changes the supply voltage of vaccum pump motor, thereby has controlled the speed of exhaust of vacuum pump.
Display circuit 6 is to be connected into window comparator with voltage comparator, the output of window comparator after triode amplifies, the driven for emitting lights diode.When the output voltage of---frequency---voltage conversion circuit 2 with negative pressure was defeated by window comparator, light emitting diode was just thought when negative pressure is a numerical value in a certain scope given in advance just luminous.
Utilize this device can make multiple medical health apparatus.Picture negative pressure therapeutic instrument, attractor etc.Make suitable shape when waiting the container of taking out negative pressure, make a certain position of human body, can be placed in one as pin, hand, trunk or a certain acupuncture point, be pumped to predetermined negative pressure value with this device again, scalable human nerve---the imbalance of body fluid function, promote human body metabolism, Here it is negative pressure therapeutic instrument.This instrument can be treated diseases such as hypertension, and health-care effect such as set up, delay senility.
Claims (4)
1, a kind of negative pressure self-checking device.It is characterized in that constituting by negative pressure sensing head 1, negative pressure-frequency-voltage transitions circuit 2, voltage comparator 3, speed of exhaust control circuit 4, vacuum pump 5, display circuit 6.
2, negative pressure self-checking device as claimed in claim 1.It is characterized in that negative pressure sensing head 1 is made of the coil of wire 7, magnetic core 8, spring 9, skeleton 11, diaphragm seal 12.
3, negative pressure self-checking device as claimed in claim 1.It is characterized in that voltage comparator 3 is to have the emitter of resistance R 4 to be connected on respectively on the collector of two difference amplifier tubes the base stage of transistor BG3 and string.And the collector of BG3 is connected to resistance R 5, and as output terminal.
4, negative pressure self-checking device as claimed in claim 1.It is characterized in that a pressure regulation wave filter that is made of transistor BG6, potentiometer W, capacitor C is arranged in the speed of exhaust control circuit 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86205255 CN86205255U (en) | 1986-07-11 | 1986-07-11 | Automatic negative pressure-regulating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86205255 CN86205255U (en) | 1986-07-11 | 1986-07-11 | Automatic negative pressure-regulating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86205255U true CN86205255U (en) | 1987-03-25 |
Family
ID=4808131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86205255 Ceased CN86205255U (en) | 1986-07-11 | 1986-07-11 | Automatic negative pressure-regulating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86205255U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104146788A (en) * | 2014-07-18 | 2014-11-19 | 苏州市君威医疗设备有限公司 | Intelligent negative pressure control aspirator applied to dental department |
| CN108030967A (en) * | 2017-12-15 | 2018-05-15 | 惠州市爱尼宝母婴用品有限公司 | The method stablized for breast pump suction |
-
1986
- 1986-07-11 CN CN 86205255 patent/CN86205255U/en not_active Ceased
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104146788A (en) * | 2014-07-18 | 2014-11-19 | 苏州市君威医疗设备有限公司 | Intelligent negative pressure control aspirator applied to dental department |
| CN108030967A (en) * | 2017-12-15 | 2018-05-15 | 惠州市爱尼宝母婴用品有限公司 | The method stablized for breast pump suction |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CE01 | Termination of patent right |