JP5646887B2 - Oxygen concentrator - Google Patents

Description

  The present invention relates to a pressure fluctuation adsorption type oxygen concentrator for supplying a patient or the like with high concentration oxygen (oxygen enriched gas) generated by using an adsorbent that preferentially adsorbs nitrogen over oxygen, for example.

  In recent years, oxygen inhalation therapy is known as one of the most effective treatments for respiratory diseases. This oxygen inhalation therapy is a method of supplying oxygen gas or oxygen-enriched gas to a patient. Recently, an oxygen concentrator capable of directly separating oxygen-enriched gas from the air has been developed.

  As such an oxygen concentrator, for example, an adsorbent oxygen concentrator using an adsorbent obtained by selective adsorption of nitrogen or oxygen is known, and as this adsorbent oxygen concentrator, pressure fluctuation adsorption using a compressor is known. Type oxygen concentrators are used.

  The oxygen concentrator includes a humidifier for humidifying the oxygen concentrated gas. This humidifier is a container provided with an inlet and an outlet and can hold water therein. By connecting the inlet nozzle on the oxygen concentrator main unit side to the inlet and connecting the outlet nozzle on the oxygen concentrator main unit side to the outlet, oxygen concentrated gas is temporarily introduced into the humidifier from the inlet. After humidifying, the oxygen concentrator main body can be returned from the outlet.

  When the amount of water in the humidifier decreases, it is necessary for the patient to remove the humidifier from the oxygen concentrator body, supply water, and then attach it to the oxygen concentrator body again. In order to facilitate the attachment of the humidifier, a technique has been proposed in which the humidifier can be attached by pushing it inward (see Patent Documents 1 and 2).

Japanese Patent No. 2857005 Japanese Patent No. 2773100

  However, the conventional technology has a problem that it is difficult to remove the humidifier. In the oxygen concentrator, lock the inlet nozzle and outlet nozzle connected to the humidifier to prevent the inlet nozzle and outlet nozzle from unintentionally coming off the humidifier. A mechanism is provided. When the humidifier is removed, it must be unlocked with a part of the finger of the hand holding the humidifier, the humidifier must be held with the remaining fingers and pulled out. Therefore, the humidifier may be dropped when trying to remove the humidifier, or a sufficient force cannot be applied to the humidifier, and the humidifier may not be removed.

  The present invention has been made in view of the above points, and an object thereof is to provide an oxygen concentrator in which a humidifier can be easily removed.

The present invention made in order to solve the above problems includes a generating means for generating an oxygen-enriched gas, a humidifier that introduces the oxygen-enriched gas from the inlet, and after the humidification, leads out from the outlet, and from the outlet An oxygen concentrator provided with a supply means for using the derived oxygen enriched gas, wherein the inlet and the outlet are respectively an inlet end and an outlet end on the oxygen concentrator main body side And the insertion direction in the insertion insertion between the introduction port and the introduction side end, and the insertion direction in the insertion attachment between the extraction port and the extraction side end. Are characterized by being inclined by the same angle in the same direction so that the humidifier side is low and the oxygen concentrator body side is high.

  In the present invention, since the insertion direction in the insertion and insertion of the introduction port and the introduction port is inclined so that the humidifier side is low and the oxygen concentrator main body side is high, when the humidifier is pulled out from the oxygen concentrator main body The humidifier gradually moves downward. That is, when the humidifier is removed, a force in the removal direction (a direction away from the oxygen concentrator main body) is applied to the humidifier by its own weight. Therefore, it is easy to remove the humidifier.

  Further, the insertion direction in the insertion and insertion of the inlet and the inlet is inclined so that the humidifier side is low and the oxygen concentrator main body side is high, so that the water contained in the humidifier is oxygen concentrated. It is unlikely that it will flow into the main body of the device.

  In the present invention, the inlet, the outlet, the inlet side end, and the outlet side end when the inlet and the outlet are connected to the inlet side end and the outlet side end, respectively. It is preferable that the portion is inclined so that the humidifier side is low and the oxygen concentrator main body side is high. By doing so, the insertion direction can be inclined so that the humidifier side is low and the oxygen concentrator body side is high.

  In this invention, it is preferable that the said insertion direction inclines 5-45 degrees with respect to a horizontal direction. The effect mentioned above becomes high enough because it is 5 degrees or more. Further, when the humidifier is attached to the apparatus main body side by being 45 ° or less, the connection between the introduction port and the introduction side end, and the discharge port and the discharge side end are simply performed by pushing the humidifier in the horizontal direction. Can be connected smoothly.

  It is preferable that the oxygen concentrator of the present invention includes a detecting unit that detects an abnormal insertion / insertion by detecting the position of the humidifier. Thereby, it can be easily confirmed whether or not the humidifier is correctly attached.

  Further, the oxygen concentrator of the present invention has a locking means for locking the state where the introduction side end is inserted and inserted into the introduction port, and a lock for locking the state where the extraction side end is inserted and inserted into the extraction port. Preferably, means or both are provided. By doing so, the insertion / insertion at the inlet or outlet is not unintentionally removed.

  In the case where there is a lock means, in the prior art, it is necessary to release the lock with a part of the finger of the hand holding the humidifier, hold the humidifier with the remaining fingers, and pull it out. Although removal was difficult, according to this invention, as above-mentioned, since the force to a removal direction is added with respect to the humidifier by the dead weight, removal of a humidifier is easy.

The said insertion direction is an axial direction in the insertion mounting | wearing with an inlet and an introduction side edge part. Moreover, the said insertion direction is an axial direction in the insertion mounting | wearing with an outlet port and an outlet side edge part.
The oxygen concentrator main body means a portion other than the humidifier in the oxygen concentrator, for example, a portion provided with an inlet nozzle and an outlet nozzle.

2 is an explanatory diagram illustrating a basic configuration of an oxygen concentrator 1. FIG. 3 is an explanatory diagram illustrating a control system of the oxygen concentrator 1. FIG. 1 is a perspective view of an oxygen concentrator 1. FIG. It is a perspective view of the humidifier 49. FIG. It is a side view of the humidifier 49. It is a top view of the humidifier 49, (a) represents the state where the inlet nozzle 125 is not connected, (b) represents the state where the inlet nozzle 125 is connected. It is side sectional drawing of the humidifier 49 and its periphery in the cross section which passes along the inlet 121c. It is a sectional side view of the humidifier 49 and its periphery in a cross section passing through the outlet port 123c, (a) shows a state where the outlet port nozzle 127 is not connected, (b) shows the outlet port nozzle 127. Represents the connected state. It is explanatory drawing showing the basic composition of the oxygen concentrator 1 of another form.

  Embodiments of the present invention will be described with reference to the drawings. In the present embodiment, oxygen is concentrated by adsorbing and removing nitrogen from the air using a nitrogen adsorbent (hereinafter referred to as an adsorbent), and this oxygen-enriched gas containing high-concentration oxygen is supplied to the patient. An example is a pressure fluctuation adsorption type medical oxygen concentrator to be supplied (hereinafter referred to as oxygen concentrator 1).

1. Schematic Configuration of Oxygen Concentrator 1 A schematic configuration of the oxygen concentrator 1 will be described with reference to FIG. As shown in FIG. 1, in the oxygen concentrator 1, ambient air is introduced through an air intake 3 and a dust filter 5, and the introduced air is introduced into a compressor 11 through an intake filter 7 and an intake muffler 9. Inhaled.

  The compressor 11 compresses the intake air by the rotation of the motor 13 to generate high-pressure air. The motor 13 is connected to an inverter 14, and the inverter 14 is connected to a commercial power source (not shown). The inverter 14 controls the number of revolutions of the motor 13 in accordance with a control value output from an electronic control device 77 described later. Further, the inverter 14 detects the rotational speed of the motor 13 and transmits the detection result to the electronic control unit 77.

  The high-pressure air generated by the compressor 11 passes through the check valves 15 and 17 and the supply valves (the first supply valve 19 and the second supply valve 21), and a pair of adsorption cylinders (the first adsorption cylinder 23 and the second adsorption cylinder). 25).

  Exhaust valves (first exhaust valve 27 and second exhaust valve 29) are connected to high-pressure air supply paths from the supply valves 19 and 21 to the adsorption cylinders 23 and 25, respectively. At the time of valve operation, each adsorption cylinder 23, 25 can be opened to the atmosphere.

  The adsorption cylinders 23 and 25 are filled with a zeolite-based adsorbent that preferentially adsorbs nitrogen in the air and separates oxygen. When high pressure air is supplied from the compressor 11 through the check valves 15 and 17 and the supply valves 19 and 21 when the exhaust valves 27 and 29 are closed, nitrogen is adsorbed from the air. An oxygen-enriched gas is generated, and the oxygen-enriched gas is sent to the product tank 35 side through the check valves 31 and 33.

  The oxygen enriched gas discharge path from the adsorption cylinders 23, 25 to the check valves 31, 33 is provided with a communication passage 37 that communicates the discharge sides of both adsorption cylinders 23, 25. A purge valve 43 composed of an electromagnetic valve is provided through the orifices 39 and 41.

  Further, a pressure regulator 45 for adjusting the pressure of the oxygen enriched gas is provided on the downstream side of the product tank 35, and the flow rate of the oxygen enriched gas regulated by the pressure regulator 45 is set by the flow rate setter 47. After that, it is sent to the humidifier 49, humidified by the humidifier 49, and then discharged to the outside through the discharge port 51. The humidifier 49 and the configuration around it will be described in detail later.

Further, an oxygen sensor 53 that detects the oxygen concentration of the oxygen-enriched gas is provided in the oxygen-enriched gas discharge path.
Further, the oxygen concentrator 1 includes an electronic control unit 77 that controls each part. The operation of the electronic control unit 77 will be described later.

2. Control System of Oxygen Concentrator 1 A control system of the oxygen concentrator 1 will be described with reference to FIG. The oxygen concentrator 1 includes a potentiometer 101 that detects the flow rate setting in the flow rate setting unit 47, a flow sensor 103 that detects the flow rate of the oxygen-enriched gas, the oxygen sensor 53 described above, and a temperature sensor 107 that detects the ambient temperature of the oxygen concentrator 1. , A pressure sensor 109 for detecting the pressure of the compressor 11, a contact sensor 110 for performing notification when the humidifier 49 is not properly attached, and an electronic control unit 77.

  The electronic control unit 77 includes an input unit 78, an output unit 79, a known microcomputer (microcomputer) 80, and a memory (for example, EEPROM) 81 for storing various data. The outputs of the potentiometer 101, the flow sensor 103, the oxygen sensor 53, the temperature sensor 107, the pressure sensor 109, the inverter 14, and the contact sensor 110 (hereinafter collectively referred to as sensors) are output to the input unit 78 of the electronic control device 77. Sent. The output of the inverter 14 is a rotation speed signal of the motor 13 as described above.

  The microcomputer 80 of the electronic control unit 77 controls the supply valves 19 and 21, the exhaust valves 27 and 29, the purge valve 43, the compressor 11 and the like based on the results input from the sensors. The control signal is output to the supply valves 19 and 21, the exhaust valves 27 and 29, the purge valve 43, and the compressor 11 through the output unit 79. Control of the supply valves 19 and 21, the exhaust valves 27 and 29, the purge valve 43, and the compressor 11 is the same as well-known ones. Further, based on the signal from the contact sensor 110, the notification lamp 112 is turned on. The effects of the contact sensor 110 and the notification lamp 112 will be described later.

The compressor 11 and the suction cylinders 23 and 25 correspond to the generating means in claim 1. Further, the discharge port 51 corresponds to the supply means in claim 1.
3. Humidifier 49 and its peripheral configuration The humidifier 49 and its peripheral configuration will be described with reference to FIGS. FIG. 3 is a perspective view of the oxygen concentrator 1. FIG. 4 is a perspective view of the humidifier 49. FIG. 5 is a side view of the humidifier 49. 6A and 6B are top views of the humidifier 49. FIG. 6A shows a state where the inlet nozzle 125 is not connected, and FIG. 6B shows a state where the inlet nozzle 125 is connected. FIG. 7 is a cross-sectional side view of the humidifier 49 and its periphery in a cross section passing through the inlet 121c. FIG. 8 is a side sectional view of the humidifier 49 and its periphery in a cross section passing through the outlet port 123c. FIG. 8A shows a state where the outlet port nozzle 127 is not connected, and FIG. 8B shows the outlet port. This represents a state in which the nozzle 127 is connected.

  As shown in FIG. 3, the oxygen concentrator 1 includes a humidifier housing portion 113 that enters the back of the casing 111 from the front. When the humidifier 49 is connected to the main body side of the oxygen concentrator 1, the humidifier 49 is accommodated in the humidifier accommodating portion 113.

  As shown in FIGS. 4 and 5, the humidifier 49 is joined to the main body 115, which is a container having an opening on the top, and the opening of the main body 115 via a seal member (not shown) with a screw or a one-touch structure. And a connecting member 119 provided on the upper side of the lid portion 117. Water for humidifying the oxygen-enriched gas can be held in the main body 115.

The lid portion 117 and the connection member 119 are formed with an introduction passage 121 and a lead-out passage 123 that communicate the outside and the inside of the main body portion 115, respectively. The introduction passage 121 has a substantially L-shaped path, and a section (referred to as an introduction port 121c) from the L-shaped bent portion 121a to the opening end 121b of the introduction passage 121 is an introduction port nozzle described later. Used for connection (insertion mounting) with (introduction side end) 125. The introduction port 121c has a cylindrical shape, and the direction of the axis L ₁ (see FIG. 5) (that is, the insertion direction into which the introduction port nozzle 125 is inserted) is higher on the opening end 121b side, and the bent portion 121a The side is inclined so as to be low (the humidifier 49 side is low and the inlet nozzle 125 side is high). The angle formed by the axis L ₁ and the horizontal direction is 5 °. This angle can be appropriately set within a range of 5 to 45 °.

  As shown in FIGS. 6A and 6B, the connection member 119 is provided with a locking mechanism (locking means) 124 using a known quick coupling method on the introduction passage 121 side. The lock mechanism 124 includes a movable piece 124a provided inside the introduction passage 121 and an operation piece 124b provided outside the introduction passage 121 and capable of sliding operation. When the operation piece 124b is slid to one side, the movable piece 124a escapes outward as shown in FIG. 6A, and when the operation piece 124b is slid in the opposite direction to the one, the movable piece 124a is As shown in FIG. 6 (b), it protrudes inward.

As shown in FIG. 4, the lead-out passage 123 has a substantially L-shaped path, and the section from the L-shaped bent portion 123 a to the opening end 123 b (the lead-out port 123 c) in the lead-out passage 123. ) Is used for connection (insertion mounting) with an outlet nozzle (exit side end) 127 described later. Outlet 123c has a cylindrical shape, the direction of the axis L ₂ (i.e., insertion direction inserting an electric outlet nozzle 127) has a high side of the open end 123b, as the side of the bent portion 123a is low Inclined (inclined so that the humidifier 49 side is low and the outlet port nozzle 127 side is high). The angle formed by the axis L ₂ and the horizontal direction is 5 °. This angle can be appropriately set within a range of 5 to 45 °.

As shown in FIG. 7, an inlet nozzle 125 is provided on the back side of the humidifier housing portion 113. The inlet nozzle 125 is supplied with oxygen-enriched gas whose flow rate is set by the flow rate setting unit 47 (see FIG. 1). Axis L ₃ inlet nozzles 125, (7 left) the distal end side is low is inclined to the back side is higher. The angle formed by the axis L ₃ and the horizontal direction is 5 °. This angle can be appropriately set within a range of 5 to 45 °.

  When the humidifier 49 is attached to the humidifier housing portion 113, the inlet nozzle 125 is inserted into the inlet 121c. The lock mechanism 124 described above is used to lock the inlet port nozzle 125 in a state where it is inserted into the inlet port 121c. That is, as shown in FIG. 6A, with the movable piece 124a escaping to the outside, the introduction port nozzle 125 is inserted into the introduction port 121c, and then the movable piece 124a is protruded inward. Then, as shown in FIG. 6B, the movable piece 124a is fitted into the groove portion 125a provided on the outer periphery of the inlet port 125, and is locked in a state where the inlet port 125 is inserted into the inlet port 121c. The

Further, as shown in FIGS. 8A and 8B, an outlet nozzle 127 is provided on the back side of the humidifier housing portion 113. The position of the outlet port nozzle 127 is the same height as the inlet port nozzle 125 and is a position at a predetermined distance from the inlet port nozzle 125 in the left-right direction. The outlet port nozzle 127 communicates with the discharge port 51 (see FIG. 1). As shown in FIG. 8B, the direction of the axis L ₄ of the outlet port nozzle 127 is inclined such that the tip side (left side in FIG. 8B) is low and the back side is high. The angle formed by the axis L ₄ and the horizontal direction is 5 °. This angle can be appropriately set within a range of 5 to 45 °. As shown in FIG. 8B, when the humidifier 49 is attached to the humidifier housing portion 113, the outlet port nozzle 127 is inserted into the outlet port 123c.

  Further, the contact sensor (detection means) 110 (see FIGS. 2, 7, and 8) described above is provided on the back side of the bottom surface of the humidifier housing portion 113. The contact sensor 110 contacts the back side of the bottom surface of the humidifier 49 and outputs a signal only when the humidifier 49 is normally attached. When the humidifier 49 is not normally attached (for example, when the humidifier 49 is not fully pushed in), the contact sensor 110 does not contact the humidifier 49 and does not output a signal. The notification lamp 112 (see FIG. 2) of the oxygen concentrator 1 displays a normal display when a signal is input from the contact sensor 110, and displays an abnormality when there is no signal input from the contact sensor 110.

  In a state where the humidifier 49 is normally attached, the oxygen-enriched gas introduced from the inlet port 125 to the inlet port 121c enters the main body 115 where it is humidified in contact with water. The humidified oxygen-enriched gas enters the outlet port nozzle 127 through the outlet port 123c, and is further sent to the outlet port 51 (see FIG. 1).

4). Method for Attaching / Removing Humidifier 49 (1) First, a method for attaching the humidifier 49 will be described with reference to FIGS. 7, 8A, and 8B. As shown to Fig.8 (a), the humidifier 49 is put on the bottom face of the humidifier accommodating part 113, and is pushed in to the back | inner side. At this time, the direction of the force applied to the humidifier 49 may be the horizontal direction. Then, the leading end of the outlet port nozzle 127 enters the outlet port 123c. Similarly, the tip of the inlet port nozzle 125 enters the inlet 121c.

When the humidifier 49 is further pushed into the back side, as shown in FIG. 8B, the entire part of the outlet port nozzle 127 that can be inserted is inserted into the outlet port 123c. Moreover, as shown in FIG. 7, the whole part which can be inserted among the nozzles 125 for inlets is inserted in the inlet 121c. Here, as described above, the axis L _{1 of the} inlet 121c, the axis L _{2 of the} outlet 123c, the axis L ₃ of the inlet nozzle 125, and the axis L ₄ of the outlet nozzle 127 are all in the same direction ( In FIGS. 7 and 8, the left side is inclined to the lower side and the right side is higher (in the same direction) and the same angle, so when the humidifier 49 is pushed inward, the humidifier 49 itself does not tilt, As it goes deeper, it gradually moves upward.

After the introduction port nozzle 125 is inserted to the back, the operation piece 124b of the lock mechanism 124 is slid to project the movable piece 124a inward. At this time, the movable piece 124a is fitted into the groove portion 125a to lock the inlet port nozzle 125.
(2) Next, a method for removing the humidifier 49 will be described. First, the operation piece 124b of the lock mechanism 124 is slid in the opposite direction to the case of locking, the movable piece 124a is released to the outside (see FIG. 6A), and the lock on the inlet nozzle 125 is released. Then, the humidifier 49 is pulled out to the near side. At this time, as described above, the axis L _{1 of the} inlet 121c, the axis L _{2 of the} outlet 123c, the axis L ₃ of the inlet nozzle 125, and the axis L ₄ of the outlet nozzle 127 are all in the same direction ( In FIGS. 7 and 8, the humidifier 49 is tilted in the same direction at a lower position on the left side and a higher direction on the right side, so that the humidifier 49 itself is not tilted. Move in the direction. Eventually, the inlet nozzle 125 is completely removed from the inlet 121c, the outlet nozzle 127 is completely removed from the outlet 123c, and the humidifier 49 is removed.

5. Advantages of the oxygen concentrator 1 (1) As described above, the humidifier 49 gradually moves downward as it is pulled out, so when the humidifier 49 is removed, the humidifier 49 Due to its own weight, a force is applied in the removal direction (direction to be pulled out to the near side). Therefore, the humidifier 49 can be easily removed.

When removing the humidifier 49, a part of the finger of the hand holding the humidifier 49 must be used to operate the operation piece 124b of the lock mechanism 124. The operation to pull out must be done with the remaining fingers. Therefore, conventionally, it has been difficult to pull out the humidifier 49 without dropping it, but in the present invention, as described above, the humidifier 49 can be pulled out with a small force. Is easy to remove.
(2) The axis L _{1 of the} inlet 121c, the axis L _{2 of the} outlet 123c, the axis L ₃ of the inlet nozzle 125, and the axis L ₄ of the outlet nozzle 127 are all low on the humidifier 49 side, and oxygen The main body side of the concentrating device 1 is high. Therefore, it is difficult for the water stored in the humidifier 49 to flow into the main body side of the oxygen concentrator 1.
(3) The oxygen concentrator 1 can notify the contact sensor 110 and the notification lamp 112 when the humidifier 49 is not properly attached.

Needless to say, the present invention is not limited to the above-described embodiment, and can be implemented in various modes without departing from the gist of the present invention.
For example, an infrared sensor or the like may be provided in the humidifier housing portion 113 instead of the contact sensor 110 to determine whether or not the humidifier 49 is correctly attached.

  7 and 8, the contact sensor 110 is provided on the back side of the bottom surface of the humidifier housing portion 113, but the position of the contact sensor 110 is a position where the attachment of the humidifier 49 can be detected. There is no particular limitation. For example, the contact sensor 110 can be provided on the near side or the center of the bottom surface of the humidifier housing portion 113.

The angle formed by the axis L _{1 of the} inlet 121c, the axis L _{2 of the} outlet 123c, the axis L ₃ of the inlet nozzle 125, and the axis L ₄ of the outlet nozzle 127 with the horizontal direction is an angle other than 5 °. There may be. This angle can be appropriately set within a range of 5 to 45 °.

  The configuration of the oxygen concentrator 1 may be that shown in FIG. 9 instead of that shown in FIG. The configuration shown in FIG. 9 is basically the same as that shown in FIG. 1, but includes three-way valves 201 and 203 instead of the check valves 15 and 17, the first supply valve 19 and the second supply valve 21. ing. High-pressure air generated by the compressor 11 is supplied to the first adsorption cylinder 23 and the second adsorption cylinder 25 via the three-way valves 201 and 203. The three-way valves 201 and 203 are also connected to the exhaust path 205. When the three-way valves 201 and 203 are closed with respect to the exhaust passage 205, when high-pressure air is supplied from the compressor 11 to the adsorption cylinders 23 and 25 via the three-way valves 201 and 203, nitrogen is adsorbed from the air. Then, oxygen-enriched gas is generated, and the oxygen-enriched gas is sent to the product tank 35 side through the check valves 31 and 33. Further, when the three-way valves 201 and 203 are open with respect to the exhaust path 205, the adsorption cylinders 23 and 25 are opened to the atmosphere. The three-way valves 201 and 203 are controlled by the electronic control unit 77.

1 ... oxygen concentrator, 3 ... air intake, 5 ... and dustproof filter,
7 ... Intake filter, 9 ... Intake muffler, 11 ... Compressor,
13 ... Motor, 14 ... Inverter, 15, 17 ... Check valve,
19 ... 1st supply valve, 21 ... 2nd supply valve, 23 ... 1st adsorption cylinder,
25 ... 2nd adsorption cylinder, 27 ... 1st exhaust valve, 29 ... 2nd exhaust valve,
31 ... Check valve, 35 ... Product tank, 37 ... Communication path,
39 ... Orifice, 43 ... Purge valve, 45 ... Pressure regulator,
47 ... Flow rate setting device, 49 ... Humidifier, 51 ... Discharge port, 53 ... Oxygen sensor,
77 ... Electronic control device, 78 ... Input unit, 79 ... Output unit, 80 ... Microcomputer,
81 ... Memory, 101 ... Potentiometer, 103 ... Flow rate sensor,
107 ... temperature sensor, 109 ... pressure sensor, 110 ... contact sensor,
111 ... Housing, 112 ... Notification lamp, 113 ... Humidifier housing,
115 ... body part, 117 ... lid part, 119 ... connection member,
121 ... Introductory passageway, 121a ... Bent part, 121b ... Open end,
121c ... inlet, 123 ... lead-out passage, 123a ... bent part,
123b ... Open end, 123c ... Outlet port, 124 ... Lock mechanism,
124a ... movable piece, 124b ... operation piece, 125 ... nozzle for introduction port,
125a ... groove portion, 127 ... outlet nozzle, 201, 203 ... three-way valve,
205 ... Exhaust path

Claims (5)

Generating means for generating oxygen-enriched gas;
A humidifier that introduces the oxygen-enriched gas from an inlet, and after humidification, leads out from an outlet;
A supply means for using the oxygen-enriched gas derived from the outlet;
An oxygen concentrator comprising:
The introduction port and the outlet port are respectively connected to the inlet side end portion and the outlet side end portion on the oxygen concentrator main body side by insertion and insertion,
The insertion direction in the insertion insertion of the introduction port and the introduction side end, and the insertion direction in the insertion attachment of the extraction port and the extraction side end are low on the humidifier side, An oxygen concentrator characterized in that it is inclined by the same angle in the same direction so that the main body side of the oxygen concentrator becomes higher.   When the introduction port and the lead-out port are connected to the introduction-side end portion and the lead-out-side end portion, respectively, the introduction port, the lead-out port, the introduction-side end portion, and the lead-out-side end portion are The oxygen concentrator according to claim 1, wherein the humidifier side is inclined and the oxygen concentrator main body side is inclined so as to be high.   The oxygen concentrator according to claim 1 or 2, wherein the insertion direction is inclined by 5 to 45 ° with respect to a horizontal direction.   The oxygen concentrator according to any one of claims 1 to 3, further comprising detection means for detecting an abnormality in the insertion and insertion by detecting a position of the humidifier.   The oxygen concentrator according to any one of claims 1 to 4, further comprising a lock unit that locks a state in which the insertion and insertion are performed at the introduction port and / or the outlet port.

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