CN101757708B - Control method of constant pressure and flow air supply system of medical large-flow air storage tank - Google Patents
Control method of constant pressure and flow air supply system of medical large-flow air storage tank Download PDFInfo
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- CN101757708B CN101757708B CN 200810239335 CN200810239335A CN101757708B CN 101757708 B CN101757708 B CN 101757708B CN 200810239335 CN200810239335 CN 200810239335 CN 200810239335 A CN200810239335 A CN 200810239335A CN 101757708 B CN101757708 B CN 101757708B
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Abstract
The invention provides a control method of a constant pressure and flow air supply system of a medical large-flow air storage tank. The air supply system comprises a compressor, a cooling and drying machine and an air storage tank, wherein the cooling and drying machine is arranged at the downstream of the compressor and the air storage tank is arranged at the downstream of the cooling and drying machine, especially, the control method comprises the pressure control on the air storage tank, the pressure control comprises the steps of electronic control and electric control, wherein the electronic control part limits the constant flow output pressure range of the air storage tank, the electric control part limits the safety pressure range of the air storage tank, and the constant flow output pressure range is included into the safety pressure range. Further, the control method also comprises the temperature control on the compressor.
Description
Technical field
The present invention relates to medical field, be specifically related to the method for the control constant pressure and flow air supply system of medical large-flow air storage tank.
Background technology
At medical central gas supply system (for example, system for one or more respirator or anesthetic machine air feed) in, in order to guarantee to provide stably breathing gas for the patient, the gas of constant voltage and constant current is exported in requirement in the air feed process, simultaneously, also to guarantee gas temperature in the air supply system basic with atmospheric temperature quite and the maintenance relative humidity very low.At present, medical central gas supply system commonly used adopts following dual mode in the prior art: the direct air feed of air compressor and air accumulator air feed.Adopting the shortcoming of the direct air feed of compressor is that the Compressed Gas utilization rate is low, because when suspending air feed, the gas that compressor is transported in the air supply system has just directly been discharged, thereby has caused gas effciency low, and causes the waste of compressor operating usefulness.And adopt the air supply system of air accumulator to address the above problem, when suspending air feed, the gas that is transported by compressor can be temporarily stored in air accumulator, just the gas in the air accumulator directly can be offered patient's use when needs use, thereby has improved the utilization rate of gas.And, can remain on requiring in the temperature range of cooling driers in order to make the gas temperature in the air supply system, also use radiator that gas is lowered the temperature in the air supply system of this improvement, utilize subsequently cooling driers Compressed Gas is further lowered the temperature and to dewater.But, in the air supply system of this employing air accumulator, pressure in the air accumulator is higher, the efficient of compressor also just descends thereupon, then determine a suitable working pressure range: the pressure in this scope in the air accumulator can guarantee to realize the demand of constant current output, can also guarantee that meanwhile compressor has preferably work efficiency.Guarantee that constant current output just must guarantee that the gas of air accumulator is in the certain pressure scope, also to guarantee on this basis the use safety of air accumulator, namely, gas in the air accumulator can not exceed the safe pressure scope, if hypotony, then can't realize air feed, if hypertonia, then air accumulator just has the danger of explosion.
Summary of the invention
The control method that the purpose of this invention is to provide a kind of constant pressure and flow air supply system of medical large-flow air storage tank, this control method is controlled the associated temperature characteristic of safety, constant current output and the compressor of air accumulator air supply system.
For above-mentioned purpose, the invention provides a kind of control method of constant pressure and flow air supply system of medical large-flow air storage tank, above-mentioned air supply system comprises compressor, be arranged on the cooling driers in compressor downstream, and the air accumulator that is arranged on the cooling driers downstream, especially, this control method comprises the pressure control to air accumulator, this pressure control comprises electronic control part and electric control system, wherein, electronic control part defines the constant current output pressure limit of air accumulator, electric control system defines the safe pressure scope of air accumulator, and the constant current output pressure limit is comprised in the safe pressure scope; Particularly, electric control system comprises: when the gas pressure in any air accumulator that senses in the pressure transducer that is connected in air accumulator and the first pressure switch was lower than the threshold pression of safe pressure scope, the control motor that is electrically connected with compressor was according to the signal enabling compressor and the cooling driers that sense; When pressure transducer with when being connected in any gas pressure that senses in the second pressure switch of air accumulator and being higher than the upper limits pressure of safe pressure scope, the control motor is according to the pressure signal close compressor and the cooling driers that sense; In the time of in the pressure in the air accumulator is in the safe pressure scope, electronic control part carries out the control of constant current output pressure to air accumulator, electronic section control comprises: when pressure sensor senses to pressure when being higher than the upper pressure of constant current pressure limit, the control motor is according to the pressure signal close compressor and the cooling driers that sense; When pressure sensor senses to pressure when being lower than the next pressure of constant current pressure limit, the control motor starts compressor and cooling driers according to the pressure signal that senses.
Preferably, control method according to constant pressure and flow air supply system of medical large-flow air storage tank of the present invention, wherein, this control method also comprises the temperature control to compressor, temperature control comprises: when be arranged on ventilating duct that compressor communicates in and when being positioned at temperature that the temperature switch in compressor downstream senses and reaching the ventilation critical temperature, control motor close compressor and cooling driers; When the temperature sensor senses in being arranged on compressor reached ceiling temperature to the temperature of compressor inside, the control motor was according to the temperature signal close compressor and the cooling driers that sense; When temperature sensor senses to temperature when being lower than lower limit temperature, the control motor is opened compressor and cooling driers according to the temperature signal that senses.
Preferably, according to the control method of constant pressure and flow air supply system of medical large-flow air storage tank of the present invention, wherein, temperature control has precedence over pressure control.
Preferably, control method according to constant pressure and flow air supply system of medical large-flow air storage tank of the present invention, wherein, comprise the intermediate pressure between upper pressure and the next pressure in the constant current output pressure limit, pressure control is carried out in accordance with the following steps: a1) at first whether the pressure in the air accumulator that senses of detected pressures sensor or the first pressure switch is lower than threshold pression, if the gas pressure that senses is lower than threshold pression, then control electric motor starting compressor and cooling driers; B1) if the gas pressure that senses is not less than threshold pression, then then detect the gas pressure that senses and whether be higher than limits pressure, if the gas pressure that senses is higher than limits pressure, then control motor close compressor and described cooling driers; C1) if the gas pressure that senses is not higher than limits pressure, whether the pressure that then detects in the air accumulator by pressure transducer is higher than upper pressure, if the gas pressure that senses is higher than upper pressure, then controls motor close compressor and cooling driers; D1) if the gas pressure that senses is not higher than upper pressure, then detect the gas pressure that senses and whether be lower than intermediate pressure, if the pressure in the air accumulator is not less than intermediate pressure, then controls motor and do not operate; E1) if the gas pressure that senses is lower than intermediate pressure, whether the pressure that then detects in the described air accumulator is lower than the next pressure, if the gas pressure that senses is not less than the next pressure, then control motor and open first cooling driers, after the scheduled time, open subsequently compressor; F1) if the gas pressure that senses is lower than the next pressure, then controls motor and open compressor and cooling driers.
Preferably, according to the control method of constant pressure and flow air supply system of medical large-flow air storage tank of the present invention, wherein, at step a1) in, the control motor also sends the low pressure alarming signal when starting compressor and cooling driers; At step b1) in, the control motor also sends the alarm for high voltage signal in close compressor and cooling driers.
Preferably, control method according to medical large-flow gas storage constant pressure and flow tank air supply system of the present invention, wherein, the first pressure switch is carried out state according to the pressure in the air accumulator and is switched, particularly, when the pressure rise in the air accumulator when the next pressure, the first pressure switch can switch to from normality abnormal, the first pressure switch disconnects and controls being connected of motor; When the reseat pressure of the pressure switch of the pressure drop to the first in the air accumulator, the first pressure switch is from the abnormal normality that switches to, and the first pressure switch is connected with the control motor again.
Preferably, control method according to constant pressure and flow air supply system of medical large-flow air storage tank of the present invention, wherein, the second pressure switch is carried out state according to the pressure in the air accumulator and is switched, particularly, when the supreme limits pressure of pressure rise in the air accumulator, the second pressure switch can switch to from normality abnormal, and the second pressure switch disconnects and controls being connected of motor; When the reseat pressure of the pressure switch of the pressure drop to the second in the air accumulator, the second pressure switch is from the abnormal normality that switches to, and the second pressure switch is connected with the control motor again.
Preferably, control method according to constant pressure and flow air supply system of medical large-flow air storage tank of the present invention, wherein, temperature control is carried out in accordance with the following steps: a2) at first whether the temperature that senses of detected temperatures switch is higher than the ventilation critical temperature, if sensed to temperature be higher than the ventilation critical temperature then control motor close compressor and cooling driers; B2) if sensed to temperature be not higher than the ventilation critical temperature, then whether the temperature in the compressor that senses of detected temperatures sensor is higher than ceiling temperature, if the temperature that senses has reached ceiling temperature, then controls motor close compressor and cooling driers; C2) if the temperature that senses is not higher than ceiling temperature, whether the temperature that then detects in the compressor is lower than lower limit temperature, if the temperature that senses is not less than lower limit temperature, then controls motor and does not operate; D2) if the temperature that senses is lower than lower limit temperature, then controls motor and open compressor and cooling driers.
Preferably, according to the control method of constant pressure and flow air supply system of medical large-flow air storage tank of the present invention, wherein, temperature switch sensed to temperature can switch by the generation state when rising to the ventilation critical temperature, thereby disconnect and control being connected of motor; During to the reset temperature of temperature switch, temperature switch returns to original state, again is connected with the control motor at the sensed drop in temperature that arrives.
Preferably, according to the control method of constant pressure and flow air supply system of medical large-flow air storage tank of the present invention, wherein, at step a2) in, the control motor also sends the high temperature alarm signal in close compressor and cooling driers; In steps d 2) in, the control motor stops to send the high temperature alarm signal when opening compressor and cooling driers.
The present invention has following technique effect:
Control method according to constant pressure and flow air supply system of medical large-flow air storage tank of the present invention adopts the control of Electrical and Electronic Dual Logic that the pressure in the air accumulator is controlled, electric control system assurance air accumulator is worked in the safe pressure scope, electronic control part guarantees that air accumulator carries out constant current output, and this control method also comprises temperature control (comprising the control to ventilation temperature and the compressor internal temperature of compressor), by the temperature of compressor being controlled to improve the work efficiency of compressor, and the gas pressure in the air accumulator is controlled in the constant current output scope of setting and is conducive to also guarantee that compressor is with preferably work efficiency operation.
Should be appreciated that, above generality is described and the following detailed description is all enumerated and illustrative, and purpose is for to the claimed further instruction that the invention provides.
Description of drawings
Accompanying drawing consists of the part of this description, is used for helping further to understand the present invention.These accompanying drawings are used for illustrating principle of the present invention with description and are not used in and limit the scope of the invention.In the accompanying drawing:
Fig. 1 shows the schematic diagram of gas circuit that has adopted according to the constant pressure and flow air supply system of medical large-flow air storage tank of control method of the present invention;
Fig. 2 shows the temperature control flow figure according to the control method of constant pressure and flow air supply system of medical large-flow air storage tank of the present invention;
Fig. 3 shows the graph of a relation according to each pressure control point of the control method of constant pressure and flow air supply system of medical large-flow air storage tank of the present invention;
Fig. 4 shows the pressure control flow chart according to the control method of constant pressure and flow air supply system of medical large-flow air storage tank of the present invention.
The specific embodiment
Below with reference to accompanying drawings the specific embodiment of the present invention and corresponding principle are described.
At first with reference to Fig. 1, wherein show a kind of gas circuit schematic diagram of constant pressure and flow air supply system of medical large-flow air storage tank, the below describes control method according to the present invention with reference to the air supply system among Fig. 1.As shown in Figure 1, this air accumulator air supply system air accumulator 8 of having comprised compressor 3, being arranged on the cooling driers 7 in compressor 3 downstreams and being arranged on cooling driers 7 downstreams.Further, also be connected with pressure transducer 9 and threshold pression switch (the first pressure switch) 10 and upper limit pressure switch (the second pressure switch) 11 on the air accumulator 8.Be provided with temperature probe (temperature sensor) (not shown) for detection of compressor 3 internal temperatures in the compressor 3, temperature probe is arranged on the coil exit of compressor 3, with herein as the temperature monitoring point, this is that the temperature of this position can reflect the duty of compressor more exactly on the other hand because this temperature probe is easily installed in this position on the one hand.And, with ventilating duct that compressor 3 links to each other in set temperature switch (not shown), this temperature switch is positioned at compressor 3 downstreams, is used for the ventilation temperature of the ventilating duct that monitoring links to each other with compressor 3.
It should be noted that in the air supply system shown in Fig. 1 each device all with prior art in used device same or similar, that is, have same or analogous structure, operation principle and effect, therefore, just given unnecessary details no longer one by one at this.Need to prove at this, pressure transducer 9 and upper limit pressure switch 10 and threshold pression switch 11 may be used to the pressure of sensing air accumulator 8 inside, and the pressure signal that senses is sent to the control motor (not shown) that links to each other with them, the control motor is as an actuator at this, when the pressure signal that receives from pressure transducer 9 and upper limit pressure switch 10 and threshold pression switch 11, the control motor will operate to start or close compressor 3 and cooling driers 7.
Especially, utilize electrical control and Electronic Control that the pressure of air accumulator 8 is carried out Dual Logic control according to the control method of air accumulator air supply system of the present invention, the pressure control of air accumulator 8 comprises electronic control part and electric control system, wherein, electronic control part defines the constant current output pressure limit of air accumulator 8, be used for guaranteeing that air accumulator 8 carries out constant current output, and electric control system defines the safe pressure scope of air accumulator 8, be used for guaranteeing that air accumulator 8 carries out work under the pressure of safety, in particular for guaranteeing the safety of air supply system in the situation that electronic control part loses efficacy.It should be noted that above-mentioned constant current output pressure limit is comprised in the safe pressure scope, that is to say, Electronic Control is carried out in the safe pressure scope.Below in conjunction with Fig. 2 safe pressure scope and choosing of constant current output pressure limit are described.Particularly, in preferred implementation of the present invention, in the situation that air accumulator 8 adopts the 8mm steel plate to make, determine that the safe pressure scope is 0.35-0.7MPa, determine that the constant current output pressure limit is 0.45-0.65MPa, wherein, 0.35MPa be called threshold pression, 0.7MPa be called limits pressure, 0.45MPa is called compressor start pressure (upper pressure), 0.65MPa is called compressor closing presure (the next pressure).In addition, also comprise the cooling driers starting pressure (intermediate pressure) between upper pressure and the next pressure in the constant current pressure limit, this pressure also is pre-set, concrete numerical value can be chosen according to actual needs, in the present embodiment, this cooling driers starting pressure can be chosen for 0.5MPa.One skilled in the art should appreciate that, because the pressure in the air accumulator 8 is less, then its gas flow that provides is larger, and the gas pressure in the air accumulator 8 is larger, then the work efficiency of compressor 3 is just relatively lower, and comprehensive above-mentioned reason has also selected above-mentioned constant current Output pressure scope in conjunction with concrete test data, certainly, this constant current Output pressure scope only is exemplary, can choose other suitable constant current Output pressure scopes according to the practical application needs.
Further, threshold pression switch 10 and upper limit pressure switch 11 have operating pressure point and reseat pressure point separately, when the pressure in they sense air accumulator 8 reaches separately operating pressure (reaching the operating pressure point), will switch by the generation state, and work as the pressure that senses when reaching reseat pressure, will reply original state.Wherein, in this preferred embodiment, the operating pressure of threshold pression switch 10 equals above-mentioned the next pressure, and (that is, 0.45MPa), its reseat pressure equals above-mentioned threshold pression (that is, 0.35MPa); (that is, 0.7MPa), its reseat pressure is elected 0.6MPa as, and this is because the pressure of pressure switch adjusting smallest interval is 0.1MPa and the operating pressure of upper limit pressure switch 11 equals above-mentioned upper limits pressure.
Below with reference to Fig. 3 the control method of air accumulator air supply system of the present invention is described, whether the pressure that at first detects in the air accumulator is in the safe pressure scope, and the detection of safe pressure scope is carried out in accordance with the following steps:
Whether the pressure that a1) detect in the air accumulator 8 that control motor detected pressures sensor 9 or threshold pression switch 10 sense are lower than threshold pression (0.35MPa), if the pressure that senses is lower than threshold pression, then controls motor and just start compressor 3 and cooling driers 7 according to this pressure signal;
B1) if the pressure in the air accumulator 8 is not less than threshold pression, whether the pressure that then then detect in the air accumulator 8 that control motor detected pressures sensor 9 or upper limit pressure switch 11 sense are higher than limits pressure (0.7MPa), if the pressure in the air accumulator 8 is higher than limits pressure on this, then control motor with regard to close compressor 3 and cooling driers 7.
If the pressure in the air accumulator that pressure transducer 9 senses 8 is not higher than limits pressure yet, show that then air accumulator 8 is in the safe pressure scope, whether the pressure that detect in the air accumulator 8 this moment is in the constant current output pressure limit:
C1) whether the pressure in the air accumulator 8 that senses of detected pressures sensor 8 are higher than compressor closing presure (0.65MPa), if the pressure in the air accumulator 8 is higher than this upper pressure, then control motor just according to the pressure signal close compressor 3 that senses and cooling driers 7;
D1) if the pressure in the air accumulator 8 is not higher than upper pressure, whether the pressure that then then detects in the air accumulator 8 is lower than cooling driers starting pressure (0.5MPa), if the pressure in the air accumulator 8 is not less than this cooling driers starting pressure, then controls motor and do not operate;
E1) if the pressure in the air accumulator 8 is lower than the cooling driers starting pressure, whether the pressure that then detects in the air accumulator 8 is lower than compressor start pressure (0.45MPa), if the pressure in the air accumulator 8 is not less than compressor start pressure, then control motor and just open first cooling driers 7, (for example, start compressor 3 after 20s) in the scheduled time subsequently;
F1) if the pressure in the air accumulator 8 has been lower than compressor start pressure, then controls motor and just open by force compressor 3 and cooling driers 7.
Preferably, at above-mentioned step a1) in, the control motor also sends the low pressure alarming signal when starting compressor 3 and cooling driers 7; And at above-mentioned step b1) in, the control motor also sends the alarm for high voltage signal in close compressor 3 and cooling driers 7.In addition, in the present embodiment, after the pressure in the air accumulator 8 is lower than the cooling driers starting pressure, start first cooling driers 7 and then start compressor 3, this is to process because Compressed Gas will carry out bleed by cooling driers 7 first before entering air accumulator 8, to reduce the relative humidity of Compressed Gas, so that gas is more suitable for patient respiratory.In above-mentioned testing process, corresponding state all can occur at operating pressure point place separately in the process of upper limit pressure switch 10 and the gas pressure change of threshold pression switch 11 in air accumulator 8 to be switched, so that whole pressure control procedure is switched between Electrical and Electronic control, concrete switching mode will be described below.
In the control method according to constant pressure and flow air supply system of medical large-flow air storage tank of the present invention, threshold pression switch 10 mainly is the threshold pression of controlling the safe pressure scope, in the present embodiment, threshold pression switch 10 has between the motor with control under original state and is electrically connected, and threshold pression switch 10 can change himself and the connection status of controlling between the motor according to pressure.On the one hand, operating pressure (the 0.45MPa that pressure in air accumulator 8 rises gradually and reaches threshold pression switch 10, equal the next pressure) time, threshold pression switch 10 can switch by the generation state, threshold pression switch 10 just disconnects and controls being connected of motor at this moment, and pressure was controlled and just finished by electronic control part this moment; On the other hand, when the pressure in air accumulator 8 dropped to the reseat pressure (0.35MPa equals threshold pression) of threshold pression switch 10 gradually, then threshold pression switch 10 was connected with the control motor again at this moment, namely returns to again original state.
Relatively, upper limit pressure switch 11 is mainly used to control the upper limits pressure of safe pressure scope, in the present embodiment, upper limit pressure switch 11 also is electrically connected with the control motor under original state, and upper limit pressure switch 11 can change himself and control connection status between the motor according to pressure equally.Upper limit pressure switch 11 can be switched by the generation state when pressure in air accumulator 8 reached, on the one hand, operating pressure (the 0.7MPa of the supreme limits pressure switch 11 of the pressure rise in air accumulator 8, equal limits pressure) time, upper limit pressure switch 11 will be from disconnecting and controlling being connected of motor, and this moment, electronic section was controlled air-channel system; And on the other hand, when the reseat pressure (0.6MPa) of the supreme limits pressure switch 11 of the pressure drop in the air accumulator 8, upper pressure switch 11 just can be recovered again and being connected of control motor, thereby returns to original state.Need to prove, the threshold pression switch 11 of upper limit pressure switch 10 can also provide pressure control buffering, control iff relying on 9 pairs of pressure of pressure transducer, then compressor 3 and cooling driers 7 can frequently be opened or close along with the fluctuation of the gas pressure in the air accumulator 8, this can cause damage to equipment undoubtedly, and use upper and lower limit pressure switch 10 and 11 to bring certain time delay to the pressure oscillation feedback, thereby control cushions to pressure.
Further, control method according to constant pressure and flow air supply system of medical large-flow air storage tank of the present invention can also be controlled the temperature of compressor 3, and temperature control has precedence over above-mentioned pressure control, namely, only under the temperature of air supply system was in situation in the safe temperature scope, system just might start.Aforesaid temperature switch is used for the ventilation temperature in sensing and the ventilating duct that compressor 3 links to each other, guarantee that the interior temperature of ventilating duct is lower than the critical temperature of ventilation, temperature sensor is used for the temperature in the sensing compressor 3, guarantees that the temperature of compressor 3 inside is in the range of safety operation of himself.Compressor for 110 ℃ of self-shield temperature; in the present embodiment; the temperature controlling range of the trouble free service of compressor is defined as 70-90 ℃; can have preferably work efficiency at this temperature range inner compressor 3; wherein 90 ℃ are called ceiling temperature, and 70 ℃ be called lower limit temperature, and the ventilation critical temperature is elected 70 ℃ as; that is the gas temperature that, enters cooling driers 7 should not be higher than 70 ℃.Below with reference to Fig. 4 temperature controlled processes of the present invention is described, temperature control is carried out in accordance with the following steps:
A2) at first the detected temperatures switch senses to the temperature of gas that is about to enter cooling driers 7 whether be higher than the ventilation critical temperature, if sensed to temperature be higher than the ventilation critical temperature then control motor close compressor 3 and cooling driers 7;
B2) if sensed to temperature be not higher than the ventilation critical temperature, the temperature sensor senses that then detects compressor 3 inside to temperature whether be higher than ceiling temperature, if the temperature that senses has reached ceiling temperature, then control motor with regard to close compressor 3 and cooling driers 7;
C2) if the temperature that senses is not higher than alarm temperature, whether the temperature that then detects in the compressor 3 is lower than lower limit temperature, if the temperature that senses is not less than lower limit temperature, then controls motor and does not operate;
D2) if the temperature that senses is lower than lower limit temperature, then controls motor and just start compressor 3 and cooling driers 7.
Need to prove, the said temperature switch has operating temperature point and reset temperature point equally, and when the temperature that senses when temperature switch reached operating temperature, temperature switch will switch by the generation state, and when reaching reset temperature, temperature switch just restPoses.In the present embodiment, the operating temperature of temperature switch is elected 70 ℃ as, and reset temperature is elected 60 ℃ as, and when the gas temperature rising reached operating temperature, temperature switch disconnected and controls being connected of motor, thus close compressor 3 and cooling driers 7; When gas temperature dropped to reset temperature, temperature switch was connected with the control motor again, thereby opened compressor 3 and cooling driers 7.In, temperature switch and situation that the control motor is connected, control motor according to temperature sensor senses to temperature compressor 3 and cooling driers 7 are controlled.
Preferably, at above-mentioned step a2) in, the control motor also sends the high temperature alarm signal in close compressor 3 and cooling driers 7, and in steps d 2) in, the control motor stops to send the high temperature alarm signal when opening compressor 3 and cooling driers 7.It should be noted that, after whole air-channel system is opened, the initial temperature of compressor 3 is very low, therefore compressor 3 can start operation, and increase gradually when the temperature in the compressor 3 and be higher than alarm temperature and so that after compressor 3 and cooling driers 7 close, by the blower fan (not shown) compressor pump 3 is dispelled the heat, until the temperature of compressor 3 just starts compressor 3 and cooling driers 7 at this after being lower than recovery temperature.In control method according to the present invention, need to utilize blower fan that compressor pump 3 is dispelled the heat, generally, after air-channel system was opened, blower fan will start thereupon, and after air-channel system was closed 10 minutes, blower fan just cut out.In another case, blower fan can cut out under the state that air-channel system is opened, that is, also again do not start in 20 minutes if compressor 3 is closed, and then blower fan can cut out.
Employing is according to the control method of constant pressure and flow air supply system of medical large-flow air storage tank of the present invention, just can realize simultaneously one or more respirator or anesthetic machine are carried out air feed, guarantee that they carry out constant voltage output in the pressure limit of safety, guarantee that meanwhile compressor has higher work efficiency.
Be the preferred embodiments of the present invention only below, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.All any modifications of doing within the spirit and principles in the present invention, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the control method of a constant pressure and flow air supply system of medical large-flow air storage tank, described air supply system comprises compressor, be arranged on the cooling driers in described compressor downstream, and the air accumulator that is arranged on described cooling driers downstream, it is characterized in that, described control method comprises the pressure control to described air accumulator, described pressure control comprises electronic control part and electric control system, wherein, described electronic control part defines the constant current output pressure limit of described air accumulator, described electric control system defines the safe pressure scope of described air accumulator, and described constant current output pressure limit is comprised in the described safe pressure scope;
Described electric control system comprises:
-when the gas pressure in any the described air accumulator that senses in the pressure transducer that is connected in described air accumulator and the first pressure switch was lower than the threshold pression of described safe pressure scope, the control motor that is electrically connected with described compressor was according to the described compressor of the signal enabling that senses and described cooling driers;
-when described pressure transducer with when being connected in any gas pressure that senses in the second pressure switch of described air accumulator and being higher than the upper limits pressure of described safe pressure scope, described control motor cuts out described compressor and described cooling driers according to the pressure signal that senses;
In the time of in the pressure in the described air accumulator is in described safe pressure scope, described electronic control part carries out the control of constant current output pressure to described air accumulator, and described electronic section control comprises:
-when described pressure sensor senses to pressure when being higher than the upper pressure of described constant current pressure limit, described control motor cuts out described compressor and described cooling driers according to the pressure signal that senses;
-when described pressure sensor senses to pressure when being lower than the next pressure of described constant current pressure limit, described control motor starts described compressor and described cooling driers according to the pressure signal that senses.
2. the control method of constant pressure and flow air supply system of medical large-flow air storage tank according to claim 1 is characterized in that, described control method also comprises the temperature control to described compressor, and described temperature control comprises:
-in being arranged on the ventilating duct that communicates with described compressor and when being positioned at temperature that the temperature switch in described compressor downstream senses and reaching the ventilation critical temperature, described control motor cuts out described compressor and described cooling driers;
When-temperature sensor senses in being arranged on described compressor reached ceiling temperature to the temperature of described compressor inside, described control motor cut out described compressor and described cooling driers according to the temperature signal that senses;
-when described temperature sensor senses to temperature when being lower than lower limit temperature, described control motor is opened described compressor and described cooling driers according to the temperature signal that senses.
3. the control method of constant pressure and flow air supply system of medical large-flow air storage tank according to claim 2 is characterized in that, described temperature control has precedence over described pressure control.
4. the control method of constant pressure and flow air supply system of medical large-flow air storage tank according to claim 1, it is characterized in that, comprise the intermediate pressure between described upper pressure and described the next pressure in the described constant current output pressure limit, described pressure control is carried out in accordance with the following steps:
Whether the pressure that a1) at first detects in the described air accumulator that described pressure transducer or described the first pressure switch sense is lower than described threshold pression, if the gas pressure that senses is lower than described threshold pression, the then described compressor of described control electric motor starting and described cooling driers;
B1) if the gas pressure that senses is not less than described threshold pression, then then detect the gas pressure that senses and whether be higher than described upper limits pressure, if the gas pressure that senses is higher than described upper limits pressure, then described control motor cuts out described compressor and described cooling driers;
C1) if the gas pressure that senses is not higher than described upper limits pressure, whether the pressure that then detects in the described air accumulator by described pressure transducer is higher than described upper pressure, if the gas pressure that senses is higher than described upper pressure, then described control motor cuts out described compressor and described cooling driers;
D1) if the gas pressure that senses is not higher than described upper pressure, then detect the gas pressure that senses and whether be lower than described intermediate pressure, if the pressure in the described air accumulator is not less than described intermediate pressure, then described control motor does not operate;
E1) if the gas pressure that senses is lower than described intermediate pressure, whether the pressure that then detects in the described air accumulator is lower than described the next pressure, if the gas pressure that senses is not less than described the next pressure, then described control motor is opened first described cooling driers, opens subsequently described compressor after the scheduled time;
F1) if the gas pressure that senses is lower than described the next pressure, then described control motor is opened described compressor and described cooling driers.
5. the control method of constant pressure and flow air supply system of medical large-flow air storage tank according to claim 4 is characterized in that,
At described step a1) in, described control motor also sends the low pressure alarming signal when starting described compressor and described cooling driers;
At described step b1) in, described control motor also sends the alarm for high voltage signal when cutting out described compressor and described cooling driers.
6. the control method of constant pressure and flow air supply system of medical large-flow air storage tank according to claim 4 is characterized in that, described the first pressure switch is carried out state according to the pressure in the described air accumulator and switched, wherein,
When the pressure rise in the described air accumulator when the described the next pressure, described the first pressure switch can switch to from normality abnormal, described the first pressure switch disconnects and being connected of described control motor; When the pressure drop in the described air accumulator during to the reseat pressure of described the first pressure switch, described the first pressure switch is from the abnormal normality that switches to, and described the first pressure switch is connected with described control motor again.
7. the control method of constant pressure and flow air supply system of medical large-flow air storage tank according to claim 4 is characterized in that, described the second pressure switch is carried out state according to the pressure in the described air accumulator and switched, wherein,
When the pressure rise in the described air accumulator when the described upper limits pressure, described the second pressure switch can switch to from normality abnormal, described the second pressure switch disconnects and being connected of described control motor; When the pressure drop in the described air accumulator during to the reseat pressure of described the second pressure switch, described the second pressure switch is from the abnormal normality that switches to, and described the second pressure switch is connected with described control motor again.
8. the control method of constant pressure and flow air supply system of medical large-flow air storage tank according to claim 2 is characterized in that, described temperature control is carried out in accordance with the following steps:
A2) at first detect the temperature that described temperature switch senses and whether be higher than described ventilation critical temperature, if sensed to temperature be higher than described ventilation critical temperature then described control motor cuts out described compressor and described cooling driers;
B2) if sensed to temperature be not higher than described ventilation critical temperature, then detect described temperature sensor senses to described compressor in temperature whether be higher than ceiling temperature, if the temperature that senses has reached described ceiling temperature, then described control motor cuts out described compressor and described cooling driers;
C2) if the temperature that senses is not higher than described ceiling temperature, whether the temperature that then detects in the described compressor is lower than described lower limit temperature, if the temperature that senses is not less than described lower limit temperature, then described control motor does not operate;
D2) if the temperature that senses is lower than described lower limit temperature, then described control motor is opened described compressor and described cooling driers.
9. the control method of constant pressure and flow air supply system of medical large-flow air storage tank according to claim 8, it is characterized in that, described temperature switch sensed to temperature can switch by the generation state when rising to described ventilation critical temperature, thereby disconnect and being connected of described control motor; Sensed to drop in temperature during to the reset temperature of described temperature switch described temperature switch return to original state, again be connected with described control motor.
10. the control method of constant pressure and flow air supply system of medical large-flow air storage tank according to claim 8 is characterized in that,
At described step b2) in, described control motor also sends the high temperature alarm signal when cutting out described compressor and described cooling driers;
In described steps d 2) in, described control motor stops to send the high temperature alarm signal when opening described compressor and described cooling driers.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200810239335 CN101757708B (en) | 2008-12-10 | 2008-12-10 | Control method of constant pressure and flow air supply system of medical large-flow air storage tank |
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| CN 200810239335 CN101757708B (en) | 2008-12-10 | 2008-12-10 | Control method of constant pressure and flow air supply system of medical large-flow air storage tank |
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| CN101757708B true CN101757708B (en) | 2013-02-20 |
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| CN103446637B (en) * | 2012-05-31 | 2017-03-08 | 张锡涛 | A kind of department of otorhinolaryngology medical multifunctional air supply system |
| CN112607710B (en) * | 2020-12-30 | 2022-10-28 | 青岛精安医疗科技有限责任公司 | Oxygen generation system and control method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5353788A (en) * | 1992-09-21 | 1994-10-11 | Miles Laughton E | Cardio-respiratory control and monitoring system for determining CPAP pressure for apnea treatment |
| CN1479639A (en) * | 2000-11-02 | 2004-03-03 | J | Breating apparatus |
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| US5522382A (en) * | 1987-06-26 | 1996-06-04 | Rescare Limited | Device and method for treating obstructed breathing having a delay/ramp feature |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5353788A (en) * | 1992-09-21 | 1994-10-11 | Miles Laughton E | Cardio-respiratory control and monitoring system for determining CPAP pressure for apnea treatment |
| CN1479639A (en) * | 2000-11-02 | 2004-03-03 | J | Breating apparatus |
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