CN103423829A - Variable frequency humidification system - Google Patents
Variable frequency humidification system Download PDFInfo
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- CN103423829A CN103423829A CN2012101535921A CN201210153592A CN103423829A CN 103423829 A CN103423829 A CN 103423829A CN 2012101535921 A CN2012101535921 A CN 2012101535921A CN 201210153592 A CN201210153592 A CN 201210153592A CN 103423829 A CN103423829 A CN 103423829A
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Abstract
The invention relates to a variable frequency humidification system comprising a main pipeline, at least one pump, at least one frequency converter, at least one humidity sensor and a control circuit. The main pipeline comprises a liquid input end and at least one liquid output end. The liquid input end is connected to a liquid source. The pumps are disposed on the main pipeline and used for guiding liquid in the liquid source from the liquid input end to the liquid output end. The frequency converters are electrically connected to the pumps and used for adjusting operating frequency of the pumps so that the pumps control the volume of the liquid flowing in the main pipeline. The humidity sensors are used for sensing ambient humidity. The control circuit is electrically connected to the humidity sensors and the frequency converters, and controls the operating frequency of the pumps according to change of the ambient humidity sensed by the humidity sensors so as to change the volume of the liquid in the main pipeline. The variable frequency humidification system allows for eased indoor humidity curves and prevents the pipeline from being damaged by water hammer generated in the pipeline.
Description
Technical field
The present invention relates to a kind of frequency conversion humidification system, relate in particular to a kind of frequency conversion humidification system that is used in dust free room.
Background technology
Dust free room is widely used in the responsive especially industry of environmental pollution, industries such as semiconductor production, biochemical technology, biotechnology, precision optical machinery, pharmacy, hospital etc., wherein with the semiconductor industry its to indoor humiture, cleanliness factor require especially strict, therefore it must be controlled in some range of needs, just can not exert an influence to processing procedure.
The mode of general dust free room controlled humidity is to control the humidity in dust free room by the sprinkling of heavy pressure fine spray (hi-fog) device.When the humidity in dust free room is too low, the heavy pressure fine spray device just can start to spray, and to improve the humidity in dust free room, and, when dustless indoor humidity is too high, the heavy pressure fine spray device stops spraying.Yet, use at present the heavy pressure fine spray device in dust free room only can be turned round with single frequency in the process of using, and main control only can rely on switching control pilot (ON/OFF) constantly to open and close, cause dustless indoor humidity fluctuated, can't continue to reach stationary value.And switching control pilot is opened the action of neglect closing suddenly, and water hammer (water hammer) easily occurs, cause the pipeline vibrations frequent, serious vibrations even can occur that the pipeline fracture is leaked, the booster damage by water, cause the out of control and board loss of humiture.And how for the problems referred to above, to be solved one of real emphasis that technical field is paid close attention to for this reason.
Summary of the invention
One of purpose of the present invention is exactly to be to provide a kind of frequency conversion humidification system, with so that the indoor humidity curve is tending towards relaxing, and avoids producing water hammer in pipeline and causes pipeline destroyed.
In order to reach above-mentioned advantage, the present invention proposes a kind of frequency conversion humidification system, comprises main body pipeline, at least one pumping, at least one frequency converter, at least one humidity sensor and control circuit.The main body pipeline comprises liquid input and at least one liquid output, and the liquid input is connected to the liquid source of supply.At least one pumping is arranged at the main body pipeline, in order to the liquid by the liquid source of supply, from the liquid input, guides to the liquid output.At least one frequency converter is electrically connected at pumping, in order to adjust the operating frequency of pumping, makes pumping control liquid mobile flow in the main body pipeline.At least one humidity sensor is in order to sensitive context humidity.Control circuit is electrically connected at humidity sensor and frequency converter, and the variable quantity of the ambient humidity sensed according to humidity sensor controls the operating frequency that frequency converter is adjusted pumping, and then changes the flow of liquid at the main body pipeline.
In one embodiment of the invention, above-mentioned frequency conversion humidification system, more comprise: at least one control valve, be arranged at the main body pipeline and be electrically connected at control circuit, and control valve is between pumping and liquid output, when the ambient humidity that control circuit senses at humidity sensor reaches the first humidity threshold value, control control valve and enter opening, when the ambient humidity that control circuit senses at humidity sensor reaches the second humidity threshold value, control control valve and enter closed condition, when control valve during in opening, liquid is exported via the liquid output, when control valve in closed condition liquid can't export via the liquid output, wherein the second humidity threshold value is greater than the first humidity threshold value, and pressure relief pipe, the one end is connected in the main body pipeline and between pumping and control valve, and the other end of pressure relief pipe is connected in the liquid source of supply, pressure relief pipe has relief valve, relief valve is opened when the hydraulic pressure of main body pipeline reaches the hydraulic pressure threshold value, makes part liquid in the main body pipeline be back to the liquid source of supply via pressure relief pipe.
In one embodiment of the invention, above-mentioned pressure relief pipe has more non-return valve, in order to prevent being back to the partially liq adverse current of liquid source of supply to the main body pipeline through pressure relief pipe.
In one embodiment of the invention, the ambient humidity of above-mentioned humidity sensor sensing is outside humidity.
In one embodiment of the invention, the ambient humidity of above-mentioned humidity sensor sensing is indoor humidity.
In one embodiment of the invention, the quantity of above-mentioned at least one pumping and at least one frequency converter is respectively a plurality of, and these frequency converters are electrically connected at respectively these pumpings, and in these pumpings, adjacent two pumpings are connected in parallel to each other.
In one embodiment of the invention, the quantity of above-mentioned at least one humidity sensor and at least one control valve is respectively a plurality of, these control valves are respectively in varying environment, and the ambient humidity of these humidity sensors these control valves that sensing is corresponding respectively, whether control circuit reaches the first humidity threshold value or the second humidity threshold value according to the ambient humidity of each humidity sensor institute sensing in these humidity sensors, and then control respectively these control valves and switched between opening and closed condition, and control circuit controls according to the mean value of the variable quantity of the ambient humidity of these humidity sensor institute sensings the operating frequency that frequency converter is adjusted pumping, and then change liquid is at the flow of main body pipeline.
In one embodiment of the invention, the quantity of at least one liquid output of aforementioned body pipeline is a plurality of, and these control valves lay respectively at these liquid control ends, and these liquid outputs have respectively nozzle.
In one embodiment of the invention, above-mentioned frequency conversion humidification system more comprises: return line, and the one end is connected in the main body pipeline, and, between liquid output and pumping, the other end of return line is connected in the liquid source of supply; The first control valve, be arranged at the main body pipeline and be electrically connected at control circuit, and the first control valve is between pumping and liquid output; And second control valve, be arranged at return line and be electrically connected at control circuit, control circuit makes the first control valve enter opening when the ambient humidity of humidity sensor institute sensing reaches the first humidity threshold value, and make the second control valve enter closed condition simultaneously, control circuit makes the first control valve enter closed condition when the ambient humidity of humidity sensor institute sensing reaches the second humidity threshold value, and make the second control valve enter opening simultaneously, wherein the second humidity threshold value is greater than the first humidity threshold value.
The described frequency conversion humidification system of the embodiment of the present invention, the variable quantity of the ambient humidity that its control circuit senses according to humidity sensor is controlled the operating frequency that frequency converter is adjusted pumping, and then change liquid is at the flow of main body pipeline, whether the ambient humidity sensed according to humidity sense side device reaches the humidity threshold value simultaneously, control control valve is switched between opening and closed condition, under such system architecture, except making the indoor humidity curve be tending towards relaxing and keeping constant, also can avoid pipeline easily to produce water hammer because control valve opens and closes frequently causes pipeline destroyed simultaneously.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to better understand technological means of the present invention, and can be implemented according to the content of specification, and for above and other objects of the present invention, feature and advantage can be become apparent, below especially exemplified by preferred embodiment, and the cooperation accompanying drawing, be described in detail as follows.
The accompanying drawing explanation
The system architecture schematic diagram that Fig. 1 is the described frequency conversion humidification system of one embodiment of the present of invention.
The system architecture schematic diagram that Fig. 2 is the described frequency conversion humidification system of an alternative embodiment of the invention.
The system architecture schematic diagram that Fig. 3 is the described frequency conversion humidification system of an alternative embodiment of the invention.
The system architecture schematic diagram that Fig. 4 is the described frequency conversion humidification system of an alternative embodiment of the invention.
The specific embodiment
Reach for further setting forth the present invention technological means and the effect that predetermined goal of the invention is taked, below in conjunction with accompanying drawing and preferred embodiment, its specific embodiment of frequency conversion humidification system, method, step, structure, feature and effect that foundation the present invention is proposed, be described in detail as follows.
Please refer to Fig. 1, its system architecture schematic diagram that is the described frequency conversion humidification system of one embodiment of the present of invention.As shown in Figure 1, the described frequency conversion humidification system 1 of the present embodiment comprises main body pipeline 10, at least one pumping 11, at least one frequency converter 12, at least one humidity sensor 13 and control circuit 14.Wherein main body pipeline 10 comprises liquid input 101 and at least one liquid output 102, and wherein liquid input 101 is connected to liquid source of supply 200.At least one pumping 11 is arranged at main body pipeline 10, and this pumping 11 guides to the liquid output 102 of main body pipeline 10 from liquid input 101 in order to the liquid by liquid source of supply 200.At least one frequency converter 12 is electrically connected at pumping 11, and this frequency converter 12 is in order to adjust the operating frequency of pumping 11, makes pumping 11 control liquid mobile flow in main body pipeline 10.At least one humidity sensor 13 is in order to sensitive context humidity.Control circuit 14 is electrically connected at humidity sensor 13 and frequency converter 12, and the variable quantity of the ambient humidity sensed according to humidity sensor controls the operating frequency that frequency converter 12 is adjusted pumpings 11, and then changes the flow of liquid at main body pipeline 10.
Hold above-mentioned, please refer to again Fig. 1, the described frequency conversion humidification system 1 of the present embodiment more comprises at least one control valve 15 and pressure relief pipe 16, this control valve 15 is arranged at main body pipeline 10 and is electrically connected at control circuit 14, and this control valve 15 is between pumping 11 and liquid output 102, for example, when the ambient humidity that control circuit 14 senses at humidity sensor 13 reaches the first humidity threshold value (being that humidity is 2g/kg), control control valve 15 and enter opening, for example, when the ambient humidity that control circuit 14 senses at humidity sensor 13 reaches the second humidity threshold value (being that humidity is 15g/kg), control control valve 15 and enter closed condition, when control valve 15 during in opening, liquid is via 102 outputs of liquid output, when control valve 15 during in closed condition, liquid can't be via 102 outputs of liquid output.One end of pressure relief pipe 16 is connected in main body pipeline 10 and between pumping 11 and control valve 15, and the other end of pressure relief pipe 16 is connected in liquid source of supply 200, pressure relief pipe 16 has relief valve 160, this relief valve 160 is opened when the hydraulic pressure of main body pipeline 10 reaches the hydraulic pressure threshold value, makes partially liq in main body pipeline 10 be back to liquid source of supply 200 via pressure relief pipe 16.And pressure relief pipe 16 has more non-return valve 161, this non-return valve is in order to prevent being back to the partially liq adverse current of liquid source of supply 200 to main body pipeline 10 through pressure relief pipe 16.For instance, there is spring (not shown at this) on relief valve 160, when the liquid hydraulic pressure of the main body pipeline 10 of flowing through is excessive (namely the flow of liquid is excessive), liquid just can compress the spring on relief valve 160, now, relief valve 160 is opened and is made the liquid of part be back to liquid source of supply 200 via pressure relief pipe 16.
Hold above-mentioned, please refer to again Fig. 1, the ambient humidity of 13 sensings of the described humidity sensor of the present embodiment is for example outside humidity, for instance, when season in spring and autumn, outdoor temperature roughly can be between 20 ℃ to 25 ℃, and humidity is roughly between between 10g/kg to 13g/kg, now, humidity is only not enough a little, the humidity (between 10g/kg to 13g/kg) that control circuit 14 senses according to humidity sensor is controlled the operating frequency that frequency converter 12 is adjusted pumping 11, for example that the operating frequency of pumping 11 is adjusted to 20 hertz (HZ), and keep this frequency run trace humidification.And when season early winter, outdoor temperature roughly can be between 12 ℃ to 20 ℃, and humidity is roughly between between 6g/kg to 10g/kg, now, humidity is only obviously not enough, the humidity (between 6g/kg to 10g/kg) that control circuit 14 senses according to humidity sensor 13 is controlled the operating frequency that frequency converter 12 is adjusted pumping 11, is for example that the operating frequency of pumping 11 is adjusted to 40 hertz (HZ), and keeps measuring humidification in this frequency run.In like manner, when season in severe winter, outdoor temperature roughly can be between 5 ℃ to 12 ℃, and humidity is roughly between between 2g/kg to 6g/kg, now, humidity is wretched insufficiency only, and the humidity (between 2g/kg to 6g/kg) that control circuit 14 senses according to humidity sensor is controlled the operating frequency that frequency converter 12 is adjusted pumping 11, be for example that the operating frequency of pumping 11 is adjusted to 60 hertz (HZ), and keep a large amount of humidifications of this frequency run.And in one embodiment, the ambient humidity of 13 sensings of humidity sensor is for example indoor temperature, and the humidity that control circuit 14 senses according to humidity sensor 13 is controlled frequency converter 12 to adjust the mode of operating frequency of pumpings 11 same as described above, at this, do not do detailed description.
Hold above-mentionedly, please refer to Fig. 1, the described frequency conversion humidification system of the present embodiment, have nozzle 103 on the liquid output 102 of its main body pipeline 10, and this nozzle 103 will be for example to form to have the vaporific of a plurality of liquid particles by the liquid of liquid output 102 outputs.The operating frequency of pumping 11 is higher, and that liquid is formed to vaporific area is larger for nozzle 103, and the distance of liquid particles ejection is longer.In addition, operating frequency difference according to pumping 11, liquid particle size from nozzle 103 ejections is also different, for instance, when the operating frequency of pumping 11 is 25 hertz (HZ), the particle diameter of liquid is for example 54 microns, when the operating frequency of pumping 11 is 45 hertz (HZ), the particle diameter of liquid is for example 39 microns, and when the operating frequency of pumping 11 is 60 hertz (HZ), the particle diameter of liquid is for example 25 microns.
Please refer to Fig. 2, its system architecture schematic diagram that is the described frequency conversion humidification system of an alternative embodiment of the invention.As shown in Figure 2, the frequency conversion humidification system 1 shown in the present embodiment described frequency conversion humidification system 1a and Fig. 1 is similar, and difference is that the described frequency conversion humidification system of the present embodiment 1a comprises a plurality of pumpings 11,11a and a plurality of frequency converter 12,12a.Wherein these frequency converters 12,12a are electrically connected at respectively these pumpings 11,11a, and these pumpings 11,11a are connected in parallel to each other.And the effect that pumping 11,11a are connected in parallel to each other is to effectively reduce the power consumption of frequency conversion humidification system 1a, that is to say, in the situation that a plurality of pumping 11,11a are connected in parallel to each other, can effectively promote energy-conservation efficiency.And the quantity of the described pumping of the present embodiment is two, be only one of them embodiment of the present invention, the present invention is not as limit.
Please refer to Fig. 3, its system architecture schematic diagram that is the described frequency conversion humidification system of an alternative embodiment of the invention.Frequency conversion humidification system 1 shown in the present embodiment described frequency conversion humidification system 1b and Fig. 1 is similar, and difference is that the described frequency conversion humidification system of the present embodiment 1b includes a plurality of humidity sensors 13,13a, 13b and a plurality of control valve 15,15a, 15b.These control valves 15,15a, 15b be for example respectively in varying environment, and these humidity sensors 13,13a, 13b are arranged at respectively near these control valves that are in different location 15,15a, 15b.These humidity sensors 13,13a, 13b these control valves 15 that sensing is corresponding respectively, this ambient humidity of 15a, 15b, whether control circuit 14 reaches the first humidity threshold value (being for example that humidity is 2g/kg) or the second humidity threshold value (being for example that humidity is 15g/kg) according to this ambient humidity of these humidity sensors 13,13a, 13b institute sensing, so control respectively these control valves 15,15a, 15b are switched between opening and closed condition.And this control circuit 14 controls according to the mean value of the variable quantity of the ambient humidity of these humidity sensors 13,13a, 13b institute sensing the operating frequency that frequency converter 12 is adjusted this pumping 11, and then change the flow of liquid at main body pipeline 10.In addition, the described main body pipeline 10 of the present embodiment has a plurality of liquid outputs 102,102a, 102b, these control valves 15,15a, 15b lay respectively near these liquid outputs 102,102a, 102b, and these liquid outputs 102,102a, 102b have respectively nozzle 103,103a, 103b.And the quantity of the described humidity sensor of the present embodiment, control valve and liquid output is three, be only one of them embodiment of the present invention, the present invention is not as limit.
Please refer to Fig. 4, its system architecture schematic diagram that is the described frequency conversion humidification system of an alternative embodiment of the invention.Frequency conversion humidification system 1 shown in the present embodiment described frequency conversion humidification system 1c and Fig. 1 is similar, and difference is that the described frequency conversion humidification system of the present embodiment 1c more comprises return line 17, control valve 18 and control valve 19.One end of return line 19 is connected in this main body pipeline 10, and, between liquid output 102 and pumping 11, the other end of return line 17 is connected in liquid source of supply 200.Control valve 18 is arranged at main body pipeline 10 and is electrically connected at control circuit 14, and control valve 18 is between pumping 11 and liquid output 102.Control valve 19 is arranged at return line 17 and is electrically connected at control circuit 14.Control circuit 14 for example, makes control valve 18 enter opening when the ambient humidity of 13 sensings of humidity sensor reaches the first humidity threshold value (being that humidity is 2g/kg), and makes control valve 19 enter closed condition simultaneously.For example, otherwise control circuit 14 makes control valve 18 enter closed condition when the ambient humidity of 13 sensings of humidity sensor reaches the second humidity threshold value (being that humidity is 15g/kg), and makes control valve 19 enter opening simultaneously.Due to when equipment shuts down, main body pipeline 10 still has pressure to exist, this pressure can cause liquid to be oozed by nozzle 103, and the advantage of the framework of the described frequency conversion humidification system of the present embodiment 1c is that the liquid that makes to residue in this main body pipeline 10 is back in liquid source of supply 200 by this return line 17.
In sum, at the described frequency conversion humidification system of the embodiment of the present invention, the variable quantity of the ambient humidity that its control circuit senses according to humidity sensor is controlled the operating frequency that frequency converter is adjusted pumping, and then change liquid is at the flow of main body pipeline, whether the ambient humidity sensed according to humidity sensor reaches the humidity threshold value simultaneously, control control valve is switched between opening and closed condition, under such system architecture, the described frequency conversion humidification system of the embodiment of the present invention has the following advantages:
1. can make humidity control more accurate, humiture environmental variance condition is less, produces yield better.
2. frequency conversion humidification, frequency reduces, and can save high pressure pumping power consumption, reduces the dust free room operating cost.
3. solve the pipeline water hammer, avoid shaking pipe breakage, the problem of board and production environment is produced in the impact that causes leaking.
The above, it is only preferred embodiment of the present invention, not the present invention is done to any pro forma restriction, although the present invention discloses as above with preferred embodiment, yet not in order to limit the present invention, any those skilled in the art, within not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be not break away from the technical solution of the present invention content, any simple modification of above embodiment being done according to technical spirit of the present invention, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (9)
1. a frequency conversion humidification system, is characterized in that, it comprises:
The main body pipeline, comprise liquid input and at least one liquid output, and wherein this liquid input is connected to the liquid source of supply;
At least one pumping, be arranged at this main body pipeline, guides to this liquid output of this main body pipeline from this liquid input in order to the liquid by this liquid source of supply;
At least one frequency converter, be electrically connected at this pumping, in order to adjust the operating frequency of this pumping, makes this pumping control this liquid mobile flow in this main body pipeline;
At least one humidity sensor, in order to sensitive context humidity; And
Control circuit, be electrically connected at this humidity sensor and this frequency converter, and the variable quantity of this ambient humidity sensed according to this humidity sensor controls the operating frequency that this frequency converter is adjusted this pumping, and then change the flow of this liquid in this main body pipeline.
2. frequency conversion humidification system according to claim 1, is characterized in that, more comprises:
At least one control valve, be arranged at this main body pipeline and be electrically connected at this control circuit, and this control valve is between this pumping and this liquid output, when this ambient humidity that this control circuit senses at this humidity sensor reaches the first humidity threshold value, control this control valve and enter opening, when this ambient humidity that this control circuit senses at this humidity sensor reaches the second humidity threshold value, control this control valve and enter closed condition, when this control valve during in this opening, this liquid is via this liquid output output, when this control valve during in this closed condition, this liquid can't be via this liquid output output, wherein this second humidity threshold value is greater than this first humidity threshold value, and
Pressure relief pipe, the one end is connected in this main body pipeline and between this pumping and this control valve, and the other end of this pressure relief pipe is connected in this liquid source of supply, this pressure relief pipe has relief valve, this relief valve is opened when the hydraulic pressure of this main body pipeline reaches the hydraulic pressure threshold value, makes this liquid of part in this main body pipeline be back to this liquid source of supply via this pressure relief pipe.
3. frequency conversion humidification system according to claim 2, is characterized in that, this pressure relief pipe has more non-return valve, in order to prevent being back to this liquid countercurrent of part of this liquid source of supply to this main body pipeline through this pressure relief pipe.
4. frequency conversion humidification system according to claim 1, is characterized in that, this ambient humidity of this humidity sensor sensing is outside humidity.
5. frequency conversion humidification system according to claim 1, is characterized in that, this ambient humidity of this humidity sensor sensing is indoor humidity.
6. frequency conversion humidification system according to claim 1, is characterized in that, the quantity of this at least one pumping and this at least one frequency converter is respectively a plurality of, and those frequency converters are electrically connected at respectively those pumpings, and in those pumpings, adjacent two pumpings are connected in parallel to each other.
7. frequency conversion humidification system according to claim 2, it is characterized in that, the quantity of this at least one humidity sensor and this at least one control valve is respectively a plurality of, those control valves are respectively in varying environment, and this ambient humidity of those humidity sensors those control valves that sensing is corresponding respectively, whether this control circuit reaches this first humidity threshold value or this second humidity threshold value according to this ambient humidity of each humidity sensor institute sensing in those humidity sensors, and then control respectively those control valves and switched between this opening and this closed condition, and this control circuit controls according to the mean value of the variable quantity of this ambient humidity of those humidity sensor institute sensings the operating frequency that this frequency converter is adjusted this pumping, and then change the flow of this liquid at this main body pipeline.
8. frequency conversion humidification system according to claim 7, is characterized in that, the quantity of at least one liquid output of this of this main body pipeline is a plurality of, and those control valves lay respectively at those liquid control ends, and those liquid outputs have respectively a nozzle.
9. frequency conversion humidification system according to claim 1, is characterized in that, more comprises:
Return line, the one end is connected in this main body pipeline, and, between this liquid output and this pumping, the other end of this return line is connected in this liquid source of supply;
The first control valve, be arranged at this main body pipeline and be electrically connected at this control circuit, and this first control valve is between this pumping and this liquid output; And
The second control valve, be arranged at this return line and be electrically connected at this control circuit, this control circuit makes this first control valve enter opening when this ambient humidity of this humidity sensor institute sensing reaches the first humidity threshold value, and make this second control valve enter closed condition simultaneously, this control circuit makes this first control valve enter this closed condition when this ambient humidity of this humidity sensor institute sensing reaches the second humidity threshold value, and make this second control valve enter this opening simultaneously, wherein this second humidity threshold value is greater than this first humidity threshold value.
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| CN2012101535921A CN103423829A (en) | 2012-05-15 | 2012-05-15 | Variable frequency humidification system |
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| CN2012101535921A CN103423829A (en) | 2012-05-15 | 2012-05-15 | Variable frequency humidification system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109491279A (en) * | 2017-09-13 | 2019-03-19 | 深圳市晨北科技有限公司 | A kind of intelligent aromatherapy device and its control system |
| CN109498930A (en) * | 2018-12-13 | 2019-03-22 | 江苏鱼跃医疗设备股份有限公司 | A kind of adjustable compressed air type atomizer of condensation rate |
-
2012
- 2012-05-15 CN CN2012101535921A patent/CN103423829A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109491279A (en) * | 2017-09-13 | 2019-03-19 | 深圳市晨北科技有限公司 | A kind of intelligent aromatherapy device and its control system |
| CN109498930A (en) * | 2018-12-13 | 2019-03-22 | 江苏鱼跃医疗设备股份有限公司 | A kind of adjustable compressed air type atomizer of condensation rate |
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Application publication date: 20131204 |