Oxygen enriching apparatus

[Detailed Description of the Invention]

[Field of the Invention] The present invention relates to a device for obtaining from the atmosphere air to which oxygen concentration was raised by being stabilized. It is related with oxygen Enrichment suitable for using it especially as an object for medical science. More particularly, the present invention adds improvement per [ which poses an important problem especially ] noise, when operation use is carried out near the patient in oxygen Enrichment for medical science.

[Description of the Prior Art] The conditions in which it is indispensable that it is low noise in order to use oxygen Enrichment for medical science near a patient's bedside in a home, a hospital, etc. also at night, and intermediary To have. Although there are two kinds of oxygen Enrichment, a film type (vacuum pump use) and an adsorbed type (pressurization pump use), by the difference in a pump, the direction of a film type has a low level of noise, and is suitable for home use. However, since the conventional oxygen Enrichment of the measure against noise is insufficient, a low noise level has not yet been reached enough. The method of preventing vibration of the method and the source of noise which generally seal the source of noise by a noise-proof wall as a policy which reduces noise, and decreasing a solid borne sound, the method of sticking a sound-absorbing material on an inner wall surface, and aiming at attenuation of sound, etc. are known. In the conventional oxygen Enrichment, although the above-mentioned measure against noise is taken in, it is not very much for achieving sufficient effect. For example, about the noise-proof wall which seals the source of noise, although it is necessary to make the mass of a noise-proof wall increase to improving insulation, if thickness of a wall is enlarged more than needed, the weight size of a device increases and it is not desirable. If the sound which comes out from the inflow mouth and outlet head of air becomes larger than the sound which penetrates a wall, since the sound which comes out of an air channel becomes rate-limiting, the effect of noise insulation will not come out of the noise level of the whole device. When the cross-sectional area of a channel is extracted too much and passage resistance is increased too much also about sticking a sound-absorbing material on the inner wall of an air channel, the flowing air content may decrease and it may produce inconvenience, such as a shortage of cooling of a pump. Therefore, it is difficult to take sufficient measures against noise, maintaining the performance of oxygen Enrichment in the conventional oxygen Enrichment, without increasing a weight size, and it is Oh.

[Objects of the Invention] It is in the object of the present invention providing oxygen Enrichment in which noise is smaller than before, without [ without it corrects the fault of the above-mentioned conventional technology and makes most weight and sizes increase compared with the conventional oxygen Enrichment, and ] reducing the function of Enrichment.

[Elements of the Invention] Both fan means for cooling an electric motor for a pump means drive and this for which research is needed wholeheartedly at a It was done result and oxygen Enrichment that this artificer should achieve this object are stored in a sound isolation box, It found out that it was very effective on a measure against noise to specify the number of times of crookedness of an atmospheric stream ON passage provided before and after that and an atmospheric stream appearance passage, and reached the present invention. That is, in oxygen Enrichment which obtains oxygen enriched air from the atmosphere using a pump means and a fan means which drive the present invention with power of an electric motor, Air Intake and an air outlet which were provided in a field which forms an outer shell of this Enrichment, A sound isolation box with an atmospheric stream appearance opening from an atmospheric stream ON opening and the chamber structure to the chamber structure provided in a sound-insulating-wall side which forms a Then this chamber structure with a chamber structure which stores the electric motor built in this Enrichment, a pump means, and a fan means, An atmospheric stream ON passage which restrains a flow of the atmosphere from the air Intake to the atmospheric stream ON opening, It is oxygen Enrichment, wherein it has an air ejection passage which restrains a flow of the atmosphere from the atmospheric stream appearance opening to the atmospheric stream exit, and each of the atmospheric stream ON passage and the atmospheric stream appearance passage has 5 times or more of the number of times of crookedness and an inside of the flection is provided with a sound-absorbing material at least. Hereinafter, the present invention is explained still in detail using a drawing. Although oxygen Enrichment in the present invention obtains air to which oxygen concentration was raised from the atmosphere, it may use together film separating mechanism, either of the adsorption separation, or both as a means which raises the oxygen concentration. The oxygen Enrichment builds in a pump means driven with an electric motor, i.e., a vacuum pump, at least one compressor, etc., and builds in at least one fan means for cooling this electric motor further etc. What built in a vacuum pump and one fan respectively with a low noise type which is the object of the present invention in order to obtain low weight type oxygen Enrichment is preferred, and film type oxygen Enrichment is especially suitable for noise reduction. In film type oxygen Enrichment, oxygen enriched air is obtained at the low-pressure side by passing the atmosphere on the surface of oxygen selective permeable membrane, and maintaining the back side at low pressure. A vacuum pump means driven with an electric motor as a means maintained at this low pressure is used, and a fan means is used, in order to make an atmospheric flow form in the film surface and to cool the electric machine. When an example of a component of film type oxygen Enrichment of the present invention is described briefly, oxygen enriched air condensed in arrangement possessing this film of a membrane element passes along a duct means provided with a vacuum meter, A vacuum pump is passed, after passing through a cooling method, a water separating means, a force means, a re-heat pipe, etc. provided with a moisture maintenance function part, it passes along a flow control means and a flow instrument, and also use is presented as oxygen enriched air of the specified quantity through a purification means, a disinfection filter, etc. provided with adsorbent etc. On the other hand, the atmosphere enters in a device via a filter by power of absorption of a fan means, after it passes through arrangement of the above-mentioned cooling method and the membrane element, passes along the circumference of the vacuum pump, and is discharged by fan means out of a device. The 1~3rd figure shows one in the state where film type oxygen Enrichment of this present invention was stored in a box, and, in Drawing 1, a side view and Drawing 3 of the front view and Drawing 2 are rear elevations. As each relative physical relationship, Drawing 1 is Y of Drawing 2.₁-Y₂A part of sectional view in a part is included, and Drawing 3 is Z of Drawing 2.₁-Z₂A sectional view of a part is included and Drawing 2 is X of Drawing 1.₁-X₂X of a part and Drawing 3₁-X₂A sectional view of the direction of an inner side in a portion equivalent to a part is shown. the [ namely, ] -- as shown in 1~figure 3, vacuum pump 1 and fan 2 who are the source of noise are stored by metal sound isolation box 3, and an inside of the sound isolation box is covered with damping materials and a sound-absorbing material. A vacuum pump is supported by the undersurface of a sound isolation box via spring 6, and it is formed so that vibration of a pump may be absorbed. 7 and 8 are atmospheric stream ON openings and atmospheric stream appearance openings of a sound isolation box, respectively. An outer shell comprises wooden cabinets 10 and sound isolation box 3 which stored the above-mentioned pump and a fan is stored in chamber structure 11. Air passage mouths 12 and 13 are provided in a position corresponding to an air inflow mouth and an air outlet head of a sound isolation box also at a sound isolation box storage room wall. In this example, an atmospheric stream ON passage of the sound isolation box reaches sound isolation box 3 through air-intake 14, condenser tube 15, instrument panel room 16, and module room 17 that stored membrane element arrangement 4. That is, an atmospheric stream ON passage is -> in Drawing 1 and Drawing 2... In a portion of , through which it passes to inlet section 7 of a sound isolation box, it is crooked a total of 7 times from a portion of , through which it passes to module room 17 through instrument panel room 16 from an air-intake part, the upper part of a condenser tube storage room, and there, and the lower part of module room 17 so that it may be indicated as ->. An atmospheric stream appearance passage comes out of sound isolation box 3, and results in outlet 19 and tray 21 of an external lower case through a crookedness passage by divider plate 18. That is, the atmospheric stream appearance passage is =-> in Drawing 2nd [ the ] and 3... It has a total of 8 times of the number of times of crookedness so that it may be indicated as ->=. It is good for the noise fall effect of crookedness discharge being carried out to ignore small, and to think by an air outlet. A sound-absorbing material is stuck on a passage. Via silence tank 20 for oxygen enriched air attracted by vacuum pump to prevent pulsation of a pump, a lead pipe is allotted so that wealth-ized air exit 21 may be reached, and as for the silence tank 20, being stored inside sound isolation box 3 is preferred. As stated above, oxygen Enrichment of the present invention stores an electric motor, a pump means, and a fan means in a sound isolation box, It is characterized by each of a To be atmospheric stream ON passage and an atmospheric stream appearance passage from the sound isolation box to an air outlet having 7 times or more of the number of times of crookedness still more preferably [ both ] 5 times or more even from air Intake to the sound isolation box. As for each length of both of this atmospheric stream ON passage and an atmospheric stream appearance passage, it is [ more than the minimum of an outer shell size of this Enrichment ] still more preferably effective in noise reduction that they are the 1.5 or more times. It is desirable a range whose length of the atmospheric stream appearance passage is 0.4~2.0 times the atmospheric stream ON passage length, and that it is in 0.5~1.5 times as many ranges still more preferably. In structure which is not included in this range, attenuation of noise in each passage is insufficient, and a Overtake and outflow side does not maintain both balance, but noise of a method of either 1 becomes To leave striped A result easily. As gaseous passage distance is generally lengthened, according to the length, the attenuation effect of noise becomes larger, but in noise in which various frequency is intermingled like this Enrichment, if it is very careful and passage length is not selected, noise may be conversely amplified by resonance. however -- when the passage has 5 times or more of the number of times of crookedness and it has specific length like the above in the present invention, at the same time it can control resonance -- noise of various frequency -- an exit and entrance -- it finds out that it is alike together and can decrease almost equally. It is preferred to install a sound-absorbing material in a flection at least of the passage. A noise fall is still more possible if a sound-absorbing material is provided in the whole inside of a passage. As for oxygen Enrichment of the present invention, as the material, although the outer shell box comprises a case which consists of a material for sound isolation, wooden is preferred. Every time this case removes an atmospheric inflow exit and an outlet head of oxygen enriched air, airtight structure is desirable, and a part which touches a sound source at least fully takes thickness of a noise-proof wall, and sticks a sound-absorbing material inside. As a concrete means of sealing-izing, connection by an ant slot and grill processing in panel surface 22 are effective, and also it is preferred to make a panel portion into dual structure. the wooden case -- 15 mm of sound isolation top Counselor -- By then -- it is, and a thickness of 15~20 mm is preferred for a weight saving, and noise is direct -- per -- being hard -- it is also effective to router-omission-process the inside about a portion. Although what kind of thing may be used as a material which constitutes it about a sound isolation box which is one of the features of the present invention, metal, such as a griddle, is preferred, in order to require the above mass to some extent on sound isolation and to attain a miniaturization. As the thickness, 0.7 mm or more is preferred, and also in order to attain the whole weight saving, a thickness of 1.5 mm or less is good. As for this sound isolation box, it is preferred that damping materials possess a sound-absorbing material on a measure against noise, among those in a side, and it is desirable to dedicate to the case in the state where it stored in wooden boxes further where a space part is established in the outside. It is effective to form a silence tank for attenuating the pulsating sound in the pump discharge side as an antinoise measure about an outflow system of oxygen enriched air. The especially silence tank is good to provide in the sound isolation box. To have for flow control means provided with a function which discharges wealth-ized air superfluous when presenting use with this wealth-ized air -- although there are things A certain thing [ making an exhaust pipe long to 10 cm or more, in order to prevent noise generating in the case of this wealth-ized air discharge, or forming a silence tank, or being and providing a flection ] is desirable.

[Example] In oxygen Enrichment shown in the 1~3rd figure, each generating noise at the time of changing the number of sheets of divider plate 18, and changing the number of times of crookedness of an atmospheric stream appearance passage and its length was measured. As a measuring method of noise, it is the place which was 1 m away from the front after 2-hour operation in the general European-style room, and used the method of measuring the noise in height above the floor level [ 40 cm of ]. The result is shown according to the 1st table below.

[Table]

[Effect of the Invention] Oxygen Enrichment by the present invention is owner ing about the characteristic which was very small and very excellent in it also as an object for medical science. [ of the occurring noise ] [ very especially near the patient ], even when it operates at night, there is an outstanding advantage that a quiet feeling can be maintained. It has the feature outstanding also in carrying, without weight and a size increasing especially by the measure against sound isolation.

[Brief Description of the Drawings]

The 1~3rd figure shows the example of 1 embodiment of the oxygen enriched air in the present invention, and, in Drawing 1, the sectional view of the side and Drawing 3 of the Drawing 2 of a front view (one copy is a sectional view) are rear elevations (most is a sectional view). In Drawing 2, a vacuum pump and 2 are [ a fan and 3 ] sound isolation boxes 1.