JP2009268738A - Oxygen concentrator - Google Patents
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- JP2009268738A JP2009268738A JP2008122325A JP2008122325A JP2009268738A JP 2009268738 A JP2009268738 A JP 2009268738A JP 2008122325 A JP2008122325 A JP 2008122325A JP 2008122325 A JP2008122325 A JP 2008122325A JP 2009268738 A JP2009268738 A JP 2009268738A
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- 239000001301 oxygen Substances 0.000 title claims abstract description 77
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 77
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 76
- 238000001816 cooling Methods 0.000 claims abstract description 60
- 239000002994 raw material Substances 0.000 claims abstract description 37
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000001179 sorption measurement Methods 0.000 claims abstract description 29
- 238000005192 partition Methods 0.000 claims abstract description 24
- 230000006835 compression Effects 0.000 claims abstract description 23
- 238000007906 compression Methods 0.000 claims abstract description 23
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 13
- 239000003463 adsorbent Substances 0.000 claims abstract description 11
- 230000003584 silencer Effects 0.000 claims description 30
- 230000005855 radiation Effects 0.000 claims description 5
- 239000011358 absorbing material Substances 0.000 claims description 4
- 238000009413 insulation Methods 0.000 abstract description 6
- 150000002926 oxygen Chemical class 0.000 abstract 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 10
- 239000000047 product Substances 0.000 description 10
- 229910001882 dioxygen Inorganic materials 0.000 description 9
- 229910001873 dinitrogen Inorganic materials 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 230000030279 gene silencing Effects 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010926 purge Methods 0.000 description 4
- 238000002664 inhalation therapy Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 229910021536 Zeolite Inorganic materials 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000003795 desorption Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000001743 silencing effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000010457 zeolite Substances 0.000 description 2
- -1 5A type Chemical compound 0.000 description 1
- 206010006458 Bronchitis chronic Diseases 0.000 description 1
- 208000014085 Chronic respiratory disease Diseases 0.000 description 1
- 206010014561 Emphysema Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 208000006673 asthma Diseases 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 206010006451 bronchitis Diseases 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 208000007451 chronic bronchitis Diseases 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000004630 mental health Effects 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 238000002640 oxygen therapy Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Oxygen, Ozone, And Oxides In General (AREA)
- Separation Of Gases By Adsorption (AREA)
Abstract
Description
本発明は、酸素よりも窒素を優先的に吸着する吸着剤を用いた圧力変動吸着型の酸素濃縮装置に関するものであり、特に慢性呼吸器疾患患者などに対して行われる酸素吸入療法に使用する医療用酸素濃縮装置に関するものである。さらに詳細には、装置内部の防音ボックス内部での消音性能の向上し、かつ、冷却手段機能劣化時における空気圧縮手段の温度上昇による故障、及び酸素生成原料空気の窒素リッチ化による酸素生成能力低下を削減することができる圧力変動吸着型酸素濃縮装置に関するものである。 The present invention relates to a pressure fluctuation adsorption type oxygen concentrator using an adsorbent that preferentially adsorbs nitrogen over oxygen, and is used particularly for oxygen inhalation therapy performed for patients with chronic respiratory diseases. The present invention relates to a medical oxygen concentrator. More specifically, the sound deadening performance inside the soundproof box inside the apparatus is improved, the failure due to the temperature rise of the air compression means at the time of the cooling means function deterioration, and the oxygen production capacity decline due to the nitrogen enrichment of the oxygen production raw material air The present invention relates to a pressure fluctuation adsorption type oxygen concentrator capable of reducing the pressure.
近年、喘息、肺気腫症、慢性気管支炎等の呼吸器系器官の疾患に苦しむ患者が増加する傾向にあるが、その治療法として最も効果的なもののひとつに酸素吸入療法がある。かかる酸素吸入療法とは、酸素ガスあるいは酸素富化空気を患者に吸入させるものである。その供給源として、酸素濃縮装置、液体酸素、酸素ガスボンベ等が知られているが、使用時の便利さや保守管理の容易さから、在宅酸素療法には酸素濃縮装置が主流で用いられている。 In recent years, the number of patients suffering from respiratory organ diseases such as asthma, emphysema, and chronic bronchitis has been increasing. One of the most effective treatment methods is oxygen inhalation therapy. Such oxygen inhalation therapy is to allow a patient to inhale oxygen gas or oxygen-enriched air. Oxygen concentrators, liquid oxygen, oxygen gas cylinders, and the like are known as supply sources, but oxygen concentrators are mainly used in home oxygen therapy because of convenience during use and ease of maintenance.
酸素濃縮装置は、空気中の約２１％の酸素を濃縮して供給する装置であり、それには酸素を選択的に透過する膜を用いた膜式酸素濃縮装置と、窒素または酸素を優先的に吸着しうる吸着剤を用いた圧力変動吸着型酸素濃縮装置があるが、高濃度の酸素が得られるという観点から圧力変動吸着型酸素濃縮装置が主流になっている。 The oxygen concentrator is a device that concentrates and supplies about 21% of oxygen in the air, and includes a membrane oxygen concentrator using a membrane that selectively permeates oxygen and nitrogen or oxygen preferentially. Although there are pressure fluctuation adsorption type oxygen concentrators using adsorbents that can be adsorbed, pressure fluctuation adsorption type oxygen concentrators are mainly used from the viewpoint of obtaining high-concentration oxygen.
圧力変動吸着型酸素濃縮装置は、酸素よりも窒素を選択的に吸着する吸着剤として５Ａ型や１３Ｘ型、Ｌｉ−Ｘ型などのモレキュラーシーブゼオライトを充填した吸着筒を用い、コンプレッサにより圧縮空気を供給することにより加圧条件下で窒素を吸着させ、未吸着の酸素を濃縮酸素として取り出す装置である。 The pressure fluctuation adsorption type oxygen concentrator uses an adsorption cylinder filled with molecular sieve zeolite such as 5A type, 13X type, and Li-X type as an adsorbent that selectively adsorbs nitrogen over oxygen, and compresses compressed air with a compressor. This is a device for adsorbing nitrogen under pressurized conditions by supplying and taking out unadsorbed oxygen as concentrated oxygen.
このような酸素濃縮装置は、患者の近傍に設置され、患者の飲食時、就寝時を問わず、終日連続的に使用するものである。そのため、酸素濃縮器から発生する騒音は、直接的に患者又は患者の家族等の耳に入り、不快感を与える恐れがある。特に就寝時などは、騒音の与える影響が大きく、患者又は患者の家族の睡眠を妨げ、メンタルヘルスにも悪影響を及ぼすことが懸念される。 Such an oxygen concentrator is installed in the vicinity of a patient, and is used continuously throughout the day regardless of whether the patient is eating or drinking and at bedtime. Therefore, the noise generated from the oxygen concentrator may directly enter the ears of the patient or the patient's family and cause discomfort. Especially at bedtime, the influence of noise is great, and there is a concern that the patient or the family of the patient may be disturbed and the mental health may be adversely affected.
圧力変動吸着タイプの酸素濃縮装置の騒音発生因子としては、圧力変動用のコンプレッサからの固体音、同コンプレッサの吸着音及び排気音、コンプレッサ駆動用モータの作動音、吸着床パージ気流音、機体内冷却用ファンの作動音等がある。中でも、コンプレッサ自身の固体放射音、コンプレッサの吸気音及び排気音を含むコンプレッサに起因する騒音は、全体に占める割合が大きい。 Noise generation factors of the pressure fluctuation adsorption type oxygen concentrator include solid sound from the compressor for pressure fluctuation, adsorption sound and exhaust sound of the compressor, operation sound of the motor for driving the compressor, suction bed purge airflow sound, There is a noise of the cooling fan. Especially, the noise which originates in the compressor including the solid radiation sound of the compressor itself, the intake sound of the compressor, and the exhaust sound is large.
従来の酸素濃縮装置では、コンプレッサからの吸気音、排気音、あるいは各種パージ音等の気流音を低減させるために、空洞型あるいは膨張型と呼ばれている消音器を使用している。例えば、特開平１０−２４５２０３号公報には膨張室の形状を方形とした消音器が記載されている（特許文献１）。 A conventional oxygen concentrator uses a silencer called a cavity type or an expansion type in order to reduce airflow noise such as intake noise, exhaust noise, and various purge sounds from a compressor. For example, Japanese Patent Application Laid-Open No. 10-245203 describes a silencer having a rectangular expansion chamber (Patent Document 1).
しかしながら、酸素生成機構に影響が生じない範囲で消音性能を向上することは困難であり、消音器だけでは十分な消音効果が得られない場合が多い。そのため、消音器を防音ボックス内に設置することで、防音ボックスの遮音・消音効果を利用し、十分な消音効果を得る構造とすることが一般的である（特許文献２）。 However, it is difficult to improve the silencing performance within a range that does not affect the oxygen generation mechanism, and a sufficient silencing effect cannot often be obtained with the silencer alone. For this reason, it is common to use a structure that obtains a sufficient silencing effect by installing a silencer in the soundproof box to utilize the sound insulation / silence effect of the soundproof box (Patent Document 2).
しかしコンプレッサは内部の摺動部品や動力源、空気の圧縮による発熱を伴うため、防音ボックス内は外部環境よりも温度が高い状態であり、また、防音ボックス内に窒素リッチガスの排気・パージ音を低減する消音器を設置した場合、防音ボックス内も窒素リッチの状態になる。このような状態の防音ボックス内に、コンプレッサの吸気音を低減する吸気消音器を設置した場合、原料空気の温度が高くなるためにコンプレッサの寿命が短くなったり、窒素リッチな空気を原料空気として取り込むことになるため、製品酸素濃度が低下するといった問題が生じていた。 However, since the compressor generates heat due to internal sliding parts, the power source, and air compression, the temperature inside the soundproof box is higher than that of the external environment, and exhaust and purge sounds of nitrogen-rich gas are generated in the soundproof box. When a silencer that reduces noise is installed, the soundproof box also becomes nitrogen-rich. When an intake silencer that reduces the intake noise of the compressor is installed in the soundproof box in such a state, the life of the compressor is shortened due to the high temperature of the raw material air, or nitrogen-rich air is used as the raw material air. Since it was taken in, the problem that the product oxygen concentration fell occurred.
本発明は、かかる装置の防音ボックスの構造を見直すことによって、十分なコンプレッサの冷却と製品酸素濃度を確保し、かつコンプレッサの吸気騒音を消音する事ができる酸素濃縮装置を提供することにある。 It is an object of the present invention to provide an oxygen concentrator capable of ensuring sufficient compressor cooling and product oxygen concentration, and capable of silencing compressor intake noise by reexamining the structure of the soundproof box of such a device.
かかる課題に対して本発明者は鋭意検討した結果、以下の酸素濃縮装置を見出した。すなわち本発明は、酸素よりも窒素を優先的に吸着する吸着剤を充填した少なくとも1個の吸着筒と、該吸着筒に圧縮空気を供給する空気圧縮手段と、該空気圧縮手段を冷却する冷却風を供給する冷却手段と、該空気圧縮手段の放射騒音を低減するための防音ボックスとを備えた酸素濃縮装置において、該防音ボックスは隔壁によって第１室および第２室に分割され、第１室に該冷却風を供給する冷却風流路と、該空気圧縮手段に原料空気を供給する原料空気流路とが各々隔壁によって分割された２流路を備え、第２室に該空気圧縮手段を備えると共に、第１室の冷却風流路と第２室の隔壁に冷却風を送風する開口部を、第１室の原料空気流路と第２室の隔壁に、一端が該空気圧縮手段に接続され、他端が原料空気流路に開口する導管を備えることを特徴とする酸素濃縮装置を提供するものである。 As a result of diligent studies on the problem, the present inventors have found the following oxygen concentrator. That is, the present invention includes at least one adsorption cylinder filled with an adsorbent that preferentially adsorbs nitrogen over oxygen, air compression means for supplying compressed air to the adsorption cylinder, and cooling for cooling the air compression means In an oxygen concentrating apparatus comprising a cooling means for supplying wind and a soundproof box for reducing radiation noise of the air compression means, the soundproof box is divided into a first chamber and a second chamber by a partition wall, The cooling air flow path for supplying the cooling air to the chamber and the raw air flow path for supplying the raw air to the air compression means are each provided with two flow paths divided by a partition, and the air compression means is provided in the second chamber. In addition, an opening for blowing cooling air to the cooling air flow path of the first chamber and the partition wall of the second chamber is connected to the raw material air flow path of the first chamber and the partition wall of the second chamber, and one end is connected to the air compression means And provided with a conduit whose other end opens into the raw material air flow path. An oxygen concentrator characterized by this is provided.
また本発明は、該原料空気流路内に、該導管に接続され、該空気圧縮手段から発生する吸気騒音を消音するための消音器が備えられたことを特徴とする酸素濃縮装置を提供するものである。 The present invention also provides an oxygen concentrator provided with a silencer in the raw material air flow path, which is connected to the conduit and silences intake noise generated from the air compression means. Is.
また本発明は、該消音器の吸気開口部の開口方向が、該防音ボックスの第１室に開口した該原料空気流路の吸気口の空気流入方向とが、直線上になく、異なる方向となるように設けられたことを特徴とする酸素濃縮装置を提供するものである。 Further, according to the present invention, the opening direction of the intake opening of the silencer is different from the direction in which the air inflow direction of the intake port of the raw material air flow path opened in the first chamber of the soundproof box is not linear. The present invention provides an oxygen concentrator provided as described above.
さらに本発明は、該冷却風流路と該原料空気流路の隔壁には吸音材を備えることを特徴とする酸素濃縮装置を提供するものである。 Furthermore, the present invention provides an oxygen concentrating device characterized in that a sound absorbing material is provided in a partition wall of the cooling air flow channel and the raw material air flow channel.
また本発明は、コンプレッサを内蔵しコンプレッサから発生する放射騒音を低減させる防音ボックス、及び該コンプレッサを冷却する冷却ファンを備えた空気圧縮装置であり、該防音ボックスは隔壁によって第１室および第２室に分割され、第１室に、該コンプレッサを冷却する冷却風を供給する冷却風流路と、該コンプレッサの原料空気を供給する原料空気流路とが各々隔壁によって分割された２流路を備え、第２室にコンプレッサを備え、該原料空気流路端部からコンプレッサの原料空気供給口を接続する導管、該冷却風流路と第１室とを連通する開口部を第1室及び第2室の間の隔壁に備えた、空気圧縮装置を提供するものである。 In addition, the present invention is a soundproof box having a built-in compressor and reducing radiation noise generated from the compressor, and an air compressor including a cooling fan for cooling the compressor. The soundproof box is divided into a first chamber and a second by a partition wall. The first chamber is provided with two flow paths in which a cooling air flow path for supplying cooling air for cooling the compressor and a raw air flow path for supplying raw air for the compressor are each divided by a partition wall. The second chamber is provided with a compressor, a conduit connecting the raw material air supply port of the compressor from the raw material air flow path end, and an opening communicating the cooling air flow channel and the first chamber with the first chamber and the second chamber. An air compression device provided in a partition wall between the two is provided.
さらに本発明は、該防音ボックスがコンプレッサを内蔵する第２室を上部とする上下２室に分割され、コンプレッサの原料空気供給口と接続する導管の第１室側端部に消音器を備えた空気圧縮装置を提供するものである。 Further, according to the present invention, the soundproof box is divided into two upper and lower chambers with the second chamber containing the compressor as an upper portion, and a silencer is provided at the first chamber side end of the conduit connected to the raw material air supply port of the compressor. An air compression device is provided.
本発明の酸素濃縮装置を使用することにより、製品酸素濃度が低下することなく、コンプレッサの吸気温度を下げることによってコンプレッサの寿命が向上し、かつ吸気騒音が低減した静音化された酸素濃縮器を提供できる。 By using the oxygen concentrator of the present invention, a silent oxygen concentrator in which the life of the compressor is improved by reducing the intake temperature of the compressor without reducing the product oxygen concentration and the intake noise is reduced. Can be provided.
本発明の酸素濃縮装置の実施態様例について図面を用いて説明する。
図１は、本発明の一実施形態である圧力変動吸着型酸素濃縮装置を例示した概略装置構成図である。この図１において、１は酸素濃縮装置、３は加湿された酸素富化空気を吸入する使用者（患者）を示す。圧力変動吸着型酸素濃縮装置１は、外部空気取り込みフィルタ101、吸気消音器102、コンプレッサ103、切換弁104、吸着筒105、逆止弁106、製品タンク107、調圧弁108、流量設定手段109、パーティクルフィルタ110を備える。これにより外部から取り込んだ原料空気から酸素ガスを濃縮した酸素富化空気を製造することができる。また、酸素濃縮装置の筐体内には、生成された酸素富化空気を加湿するための加湿器201、前記流量設定手段109の設定値と、酸素濃度センサ301、流量センサ302の測定値を用いて、コンプレッサや切換弁を制御する制御手段401、コンプレッサの騒音を防音するためのコンプレッサボックス501、コンプレッサを冷却するための冷却ファン502が内蔵されている。
Embodiment examples of the oxygen concentrator of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic device configuration diagram illustrating a pressure fluctuation adsorption type oxygen concentrator as an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes an oxygen concentrator, and 3 denotes a user (patient) who inhales humidified oxygen-enriched air. The pressure fluctuation adsorption type oxygen concentrator 1 includes an external air intake filter 101, an intake silencer 102, a compressor 103, a switching valve 104, an adsorption cylinder 105, a check valve 106, a product tank 107, a pressure regulating valve 108, a flow rate setting means 109, A particle filter 110 is provided. Thereby, oxygen-enriched air obtained by concentrating oxygen gas from the raw material air taken in from the outside can be produced. Further, the humidifier 201 for humidifying the generated oxygen-enriched air, the set value of the flow rate setting means 109, and the measured values of the oxygen concentration sensor 301 and the flow rate sensor 302 are used in the casing of the oxygen concentrator. A control unit 401 for controlling the compressor and the switching valve, a compressor box 501 for preventing noise from the compressor, and a cooling fan 502 for cooling the compressor are incorporated.
まず外部から取り込まれる原料空気は、塵埃などの異物を取り除くための外部空気取り込みフィルタ101、吸気消音器102を備えた空気取り込み口から取り込まれる。このとき、通常の空気中には、約２１％の酸素ガス、約７７％の窒素ガス、０．８％のアルゴンガス、水蒸気ほかのガスが１．２％含まれている。かかる装置では、呼吸用ガスとして必要な酸素ガスのみを濃縮して取り出す。 First, raw material air taken in from the outside is taken in from an air intake port provided with an external air intake filter 101 and an intake silencer 102 for removing foreign matters such as dust. At this time, the normal air contains 1.2% of oxygen gas of about 21%, nitrogen gas of about 77%, argon gas of 0.8%, water vapor and the like. In such an apparatus, only oxygen gas necessary as a breathing gas is concentrated and extracted.
この酸素ガスの取り出しは、原料空気を酸素ガス分子よりも窒素ガス分子を選択的に吸着するゼオライトなどからなる吸着剤が充填された吸着筒に対して、切換弁104によって対象とする吸着筒を順次切り換えながら、原料空気をコンプレッサ103により加圧して供給し、吸着筒内で原料空気中に含まれる約７７％の窒素ガスを選択的に吸着除去する。 The oxygen gas is taken out from the adsorption cylinder filled with an adsorbent made of zeolite or the like that selectively adsorbs nitrogen gas molecules rather than oxygen gas molecules. While sequentially switching, the source air is pressurized and supplied by the compressor 103, and approximately 77% of nitrogen gas contained in the source air is selectively adsorbed and removed in the adsorption cylinder.
前記の吸着筒としては、前記吸着剤を充填した円筒状容器で形成され、通常、１筒式、２筒式の他に３筒以上の多筒式が用いられるが、連続的かつ効率的に原料空気から酸素富化空気を製造するためには、多筒式の吸着筒を使用することが好ましい。また、前記のコンプレッサとしては、揺動型空気圧縮機が用いられるほか、スクリュー式、ロータリー式、スクロール式などの回転型空気圧縮機が用いられる場合もある。また、このコンプレッサを駆動する電動機の電源は、交流であっても直流であってもよい。
前記吸着筒105で吸着されなかった酸素ガスを主成分とする酸素富化空気は、吸着筒へ逆流しないように設けられた逆止弁106を介して、製品タンク107に流入する。
The adsorption cylinder is formed of a cylindrical container filled with the adsorbent, and usually a multi-cylinder type of three or more cylinders is used in addition to the one-cylinder type and the two-cylinder type. In order to produce oxygen-enriched air from raw material air, it is preferable to use a multi-cylinder type adsorption cylinder. As the compressor, a swing type air compressor may be used, and a rotary type air compressor such as a screw type, a rotary type, or a scroll type may be used. Further, the power source of the electric motor that drives the compressor may be alternating current or direct current.
Oxygen-enriched air mainly composed of oxygen gas that has not been adsorbed by the adsorption cylinder 105 flows into the product tank 107 through a check valve 106 provided so as not to flow backward to the adsorption cylinder.
また、吸着筒内に充填された吸着剤に吸着された窒素ガスは、新たに導入される原料空気から再度窒素ガスを吸着するために吸着剤から脱着させる必要がある。このために、コンプレッサによって実現される加圧状態から、切換弁によって減圧状態（例えば大気圧状態又は負圧状態）に切り換え、吸着されていた窒素ガスを脱着させて吸着剤を再生させる。この脱着工程において、その脱着効率を高めるため、吸着工程中の吸着筒の製品端側或いは製品タンクから酸素富化空気をパージガスとして逆流させるようにしてもよい。 Further, the nitrogen gas adsorbed by the adsorbent filled in the adsorption cylinder needs to be desorbed from the adsorbent in order to adsorb the nitrogen gas again from the newly introduced raw material air. For this purpose, the pressurized state realized by the compressor is switched to a reduced pressure state (for example, an atmospheric pressure state or a negative pressure state) by the switching valve, and the adsorbent is regenerated by desorbing the adsorbed nitrogen gas. In this desorption process, in order to increase the desorption efficiency, oxygen-enriched air may be allowed to flow back as a purge gas from the product end side or product tank of the adsorption cylinder during the adsorption process.
原料空気から生成された酸素富化空気は、製品タンクへ蓄えられる。この製品タンクに蓄えられた酸素富化空気は、例えば９５％といった高濃度の酸素ガスを含んでおり、調圧弁108や流量設定手段109などによってその供給流量と圧力とが制御されながら、加湿器201へ供給され、加湿された酸素富化空気が患者に供給される。かかる加湿器には、水分透過膜を有する水分透過膜モジュールによって、外部空気から水分を取り込んで乾燥状態の酸素富化空気へ供給する無給水式加湿器や、水を用いたバブリング式加湿器、或いは表面蒸発式加湿器を用いることが出来る。 Oxygen-enriched air generated from the raw air is stored in the product tank. The oxygen-enriched air stored in this product tank contains high-concentration oxygen gas, for example, 95%, and the humidifier is controlled while the supply flow rate and pressure are controlled by the pressure regulating valve 108 and the flow rate setting means 109. Supplied to 201 and humidified oxygen-enriched air is supplied to the patient. In such a humidifier, a moisture permeable membrane module having a moisture permeable membrane takes in moisture from external air and supplies it to dry oxygen-enriched air, a bubbling humidifier using water, Alternatively, a surface evaporation humidifier can be used.
また、流量設定手段109の設定値を検知し、制御手段401によりコンプレッサの電動機の回転数を制御することで吸着筒への供給風量を制御する。設定流量が低流量の場合には回転数を落とすことで生成酸素量を抑え、且つ消費電力の低減を図ることができる。 Further, the set value of the flow rate setting means 109 is detected, and the control means 401 controls the number of rotations of the compressor motor, thereby controlling the amount of air supplied to the adsorption cylinder. When the set flow rate is low, the amount of generated oxygen can be suppressed and the power consumption can be reduced by reducing the rotation speed.
図２、図３は図１のコンプレッサ103の吸気騒音を低減するためコンプレッサボックス501内に吸気消音器102を備えた場合における、コンプレッサボックス501内の冷却風と原料空気の吸気機構の模式図である。コンプレッサボックス501はコンプレッサ底板隔壁601によってコンプレッサボックス下側の第１室602、コンプレッサボックス上側の第２室603の２室に分かれており、第１室602はさらに吸気消音器102と流路隔壁604によって原料空気流路701と冷却風流路702に分かれている。 2 and 3 are schematic views of the intake mechanism for the cooling air and the raw air in the compressor box 501 when the intake silencer 102 is provided in the compressor box 501 in order to reduce the intake noise of the compressor 103 in FIG. is there. The compressor box 501 is divided into two chambers, a first chamber 602 on the lower side of the compressor box and a second chamber 603 on the upper side of the compressor box, by a compressor bottom plate partition 601. Are divided into a raw material air channel 701 and a cooling air channel 702.
原料空気は第１室の側面に開口した吸気口605より流入し、原料空気流路701を通り、原料空気流路内に設置された吸気消音器102の原料空気流路701側に設けられた空気取り込み口より吸気消音器102に取り込まれ、吸気配管606を通してコンプレッサに取り込まれる。かかる消音器は、コンプレッサが発生する吸気騒音によってその種類、大きさは選定されるが、かかる実施例では膨張型消音器を用いた。原料空気流路内に膨張型消音器モジュールを設置する他、原料空気流路を隔壁により区画して消音室を設けても良い。 The raw material air flows in from the intake port 605 that opens to the side surface of the first chamber, passes through the raw material air channel 701, and is provided on the raw material air channel 701 side of the intake silencer 102 installed in the raw material air channel. The air is taken into the intake silencer 102 from the air intake port, and taken into the compressor through the intake pipe 606. Such a silencer is selected depending on the intake noise generated by the compressor, and in this embodiment, an expansion silencer is used. In addition to installing the expansion silencer module in the raw material air flow path, the raw air flow path may be partitioned by a partition wall to provide a silencer chamber.
一方、冷却ファン502によって冷却風は原料空気と同じ第１室の側面に開口した吸気口605より流入し、コンプレッサ底板隔壁601に備えられた冷却風流入口607を通り、コンプレッサ103を冷却し、コンプレッサボックス内部の熱と排気消音器111から放出される窒素リッチな空気を押し出すようにコンプレッサボックス501上部に備えられた冷却風流出口608を通り、冷却ファン502より流出する。 On the other hand, the cooling air is cooled by the cooling fan 502 through the air inlet 605 opened on the side of the first chamber, which is the same as the raw material air, passes through the cooling air inlet 607 provided in the compressor bottom plate partition wall 601, and cools the compressor 103. The air flows out of the cooling fan 502 through the cooling air outlet 608 provided at the top of the compressor box 501 so as to push out the heat inside the box and the nitrogen-rich air discharged from the exhaust silencer 111.
このようにコンプレッサ103の吸気騒音を低減するために、コンプレッサボックス501内に吸気消音器102を備えた場合においても、冷却風と原料空気の流路がコンプレッサボックス501内で切り離されているため、原料空気と冷却風が混じる可能性が少なくなり、冷却ファン502が機能劣化した場合においても原料空気が冷却風流路からの影響によって温度上昇や窒素リッチ化することが防ぐことができ、コンプレッサの劣化や酸素生成能力低下を抑えることができる。 As described above, in order to reduce the intake noise of the compressor 103, even when the intake silencer 102 is provided in the compressor box 501, the flow path of the cooling air and the raw material air is separated in the compressor box 501, The possibility that raw material air and cooling air are mixed is reduced, and even when the cooling fan 502 is deteriorated in function, the raw material air can be prevented from rising in temperature and nitrogen-rich due to the influence of the cooling air flow path, and the deterioration of the compressor And a decrease in oxygen generation capacity can be suppressed.
具体的な実施事例として、図３（Ａ）のように吸気消音器102に備えられた空気取り込み口は吸気騒音をコンプレッサボックス501より漏れ出さないように、吸気口605からできるだけ離れた場所に備え消音性能を向上することが望ましく、該消音器の吸気開口部の開口方向が、該防音ボックスの第１室に開口した該原料空気流路の吸気口の空気流入方向とが、直線上になく、異なる方向となるように設けるのが好ましい。図３（Ａ）のように原料空気流路を第１室に鉤状に区画し、吸気口605と吸気消音器102の空気取り入れ口が最も離れるように設け、開口方向が同一方向にならないように開口部を設ける。 As a specific implementation example, an air intake port provided in the intake silencer 102 as shown in FIG. 3A is provided in a place as far as possible from the intake port 605 so as not to leak the intake noise from the compressor box 501. It is desirable to improve the silencing performance, and the opening direction of the intake opening portion of the silencer is not in a straight line with the air inflow direction of the inlet port of the raw material air flow path opened in the first chamber of the soundproof box. It is preferable to provide them in different directions. As shown in FIG. 3A, the raw material air flow path is partitioned into a first chamber and is provided so that the air intake port 605 and the air intake port of the intake silencer 102 are farthest from each other so that the opening directions are not the same direction. An opening is provided in
また冷却風流入口606はより外気に近い冷たい空気を吸い込むことで冷却性能が上がるため、吸気口605にできるだけ近い場所に備えることが望ましい。但し、冷却風流入口607からはコンプレッサ103の放射音が漏れ出るため冷却性能に影響が出ない範囲で吸気口605から離すことが望ましい。 Further, the cooling air inlet 606 is preferably provided in a place as close as possible to the intake port 605 because the cooling performance is improved by sucking cold air closer to the outside air. However, since the radiated sound of the compressor 103 leaks from the cooling air inlet 607, it is desirable to keep it away from the inlet 605 within a range that does not affect the cooling performance.
また、図３（Ｂ）のように原料空気流路701や冷却風流路702の周囲隔壁に吸音材・制振材801を貼る事で、吸気消音器102から漏れ出す吸気騒音や冷却風流入口607から漏れ出すコンプレッサ103の放射音を低減する消音ダクトを構成することができる。 In addition, as shown in FIG. 3B, by attaching a sound absorbing material / damping material 801 to the surrounding partition walls of the raw air flow path 701 and the cooling air flow path 702, the intake noise leaking from the intake silencer 102 and the cooling air inlet 607 It is possible to configure a silencer duct that reduces the radiated sound of the compressor 103 that leaks from the compressor.
さらに、図３（Ｃ）のように冷却風流路の吸気ダクトの消音・遮音効果を高めるための構造として遮音・吸音隔壁802を追加することも可能であり、原料空気流路701には消音性能の向上と吸着性能の維持を、冷却風流路702には冷却性能の維持を考慮し、各々に適した消音ダクトを構築することができるため効果的にコンプレッサボックス501内で発生する騒音の低減を実現することができる。 Further, as shown in FIG. 3 (C), a sound insulation / sound absorbing partition wall 802 can be added as a structure for enhancing the noise reduction / sound insulation effect of the intake duct of the cooling air passage. Considering the maintenance of the cooling performance in the cooling air flow path 702, it is possible to construct a silencing duct suitable for each, so that the noise generated in the compressor box 501 can be effectively reduced. Can be realized.
１：酸素濃縮装置
２：無給水式加湿器
３：使用者
101：外部空気取り込みフィルタ
102：吸気消音器
103：コンプレッサ
104：切換弁
105：吸着筒
106：逆止弁
107：製品タンク
108：調圧弁
109：流量設定手段
110：パーティクルフィルタ
111：排気消音器
201：加湿器
301：酸素濃度センサ
302：流量センサ
401：制御手段
501：コンプレッサボックス
502：冷却ファン
601：コンプレッサ底板隔壁
602：コンプレッサボックス下側１室
603：コンプレッサボックス上側２室
604：流路隔壁
605：吸気口
606：吸気配管
607：冷却風流入口
608：冷却風流出口
701：原料空気流路
702：冷却風流路
801：吸音材・制振材
802：遮音・吸音隔壁
1: Oxygen concentrator 2: Waterless humidifier 3: User
101: External air intake filter
102: Intake silencer
103: Compressor
104: Switching valve
105: Adsorption cylinder
106: Check valve
107: Product tank
108: Pressure regulating valve
109: Flow rate setting method
110: Particle filter
111: Exhaust silencer
201: Humidifier
301: Oxygen concentration sensor
302: Flow sensor
401: Control means
501: Compressor box
502: Cooling fan
601: Compressor bottom plate partition
602: One room below the compressor box
603: Two upper chambers in the compressor box
604: Channel bulkhead
605: Inlet
606: Intake piping
607: Cooling air inlet
608: Cooling air outlet
701: Raw material air flow path
702: Cooling air flow path
801: Sound absorbing material / damping material
802: Sound insulation / absorption wall
Claims (6)
該防音ボックスは隔壁によって第１室および第２室に分割され、第１室に該冷却風を供給する冷却風流路と、該空気圧縮手段に原料空気を供給する原料空気流路とが各々隔壁によって分割された２流路を備え、第２室に該空気圧縮手段を備えると共に、第１室の冷却風流路と第２室の隔壁に冷却風を送風する開口部を、第１室の原料空気流路と第２室の隔壁に、一端が該空気圧縮手段に接続され、他端が原料空気流路に開口する導管を備えることを特徴とする酸素濃縮装置。 At least one adsorption cylinder filled with an adsorbent that preferentially adsorbs nitrogen over oxygen, air compression means for supplying compressed air to the adsorption cylinder, and cooling for supplying cooling air for cooling the air compression means And an oxygen concentrator comprising a soundproof box for reducing radiation noise of the air compression means,
The soundproof box is divided into a first chamber and a second chamber by a partition, and a cooling air passage for supplying the cooling air to the first chamber and a raw air passage for supplying the raw air to the air compressing means are each a partition. And the air compression means in the second chamber, and an opening for sending cooling air to the cooling air flow channel of the first chamber and the partition wall of the second chamber, the raw material of the first chamber An oxygen concentrating apparatus comprising: an air flow path and a partition wall of a second chamber; and a conduit having one end connected to the air compression means and the other end opened to the raw material air flow path.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103663383A (en) * | 2013-12-24 | 2014-03-26 | 湖南新云医疗装备工业有限公司 | Small type wall-mounted oxygen making machine |
| JP2014064771A (en) * | 2012-09-26 | 2014-04-17 | Teijin Pharma Ltd | Oxygen concentrator |
| CN106348250A (en) * | 2016-08-27 | 2017-01-25 | 成都联帮医疗科技股份有限公司 | Double-action Roots pump oxygen-generation air compressor and air compression denitrogenation method |
| JP2020028860A (en) * | 2018-08-23 | 2020-02-27 | 北越工業株式会社 | Gas generator |
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| JP2001278603A (en) * | 2000-03-31 | 2001-10-10 | Ngk Spark Plug Co Ltd | Oxygen enricher |
| JP2004188123A (en) * | 2002-12-13 | 2004-07-08 | Terumo Corp | Oxygen condensator |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001278603A (en) * | 2000-03-31 | 2001-10-10 | Ngk Spark Plug Co Ltd | Oxygen enricher |
| JP2004188123A (en) * | 2002-12-13 | 2004-07-08 | Terumo Corp | Oxygen condensator |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014064771A (en) * | 2012-09-26 | 2014-04-17 | Teijin Pharma Ltd | Oxygen concentrator |
| CN103663383A (en) * | 2013-12-24 | 2014-03-26 | 湖南新云医疗装备工业有限公司 | Small type wall-mounted oxygen making machine |
| CN106348250A (en) * | 2016-08-27 | 2017-01-25 | 成都联帮医疗科技股份有限公司 | Double-action Roots pump oxygen-generation air compressor and air compression denitrogenation method |
| CN106348250B (en) * | 2016-08-27 | 2018-04-17 | 成都联帮医疗科技股份有限公司 | A kind of double acting lobe pump oxygen air compressor machine and air compress denitrogen method |
| JP2020028860A (en) * | 2018-08-23 | 2020-02-27 | 北越工業株式会社 | Gas generator |
| JP7188691B2 (en) | 2018-08-23 | 2022-12-13 | 北越工業株式会社 | gas generator |
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