JP2010178939A - Oxygen supplying apparatus for medical use - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an oxygen supplying apparatus for medical use having the function that an ultraviolet sensor mounted on a body detects a fire. <P>SOLUTION: In the oxygen supplying apparatus, comprising a fire sensor and a temperature sensor, an control section drives a reporting means to report the fire when the fire sensor detects the fire, and the control section further drives the reporting means to report and controls an oxygen generating means to stop when the temperature sensor detects the predetermined temperature or higher. The fire sensor, or an ultraviolet sensor, is mounted on the inside of the body, and has an ultraviolet transmitting window. Also, two or more fire sensors are mounted, and their directional axes are different view angles mutually. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

The present invention relates to a medical oxygen supply device, and more particularly, to a medical oxygen supply device including fire spread suppression and fire prevention means.

Conventionally, a medical oxygen supply device used for oxygen inhalation therapy that is effective as a treatment for patients with respiratory diseases such as asthma, emphysema, and chronic bronchitis selectively transmits nitrogen through air. Adsorption methods using adsorbed zeolite as an adsorbent are widely used.

In addition, since this type of medical oxygen supply device is usually used by a home patient in the home, pressure abnormalities or generated are generated in order to ensure the safety of operation of the medical oxygen supply device. There is also a system that detects equipment abnormalities such as oxygen concentration abnormality and equipment temperature abnormality.

However, since oxygen has an auxiliary property, when using a medical oxygen supply device, the surrounding fire is strictly prohibited, but the user (patient) or the user's family or caregiver in the vicinity of the device Smoking when using this device, or using a device near a fire such as a stove, ignited an extension tube to which a nasal cannula or mouth mask is connected, resulting in a fire accident. As a means to prevent fire due to ignition, the medical oxygen supply device is equipped with a smoke detection function to issue a warning against smoking around the device (Patent Document 1), and with a flame retardant fiber around the soft tube The use of coated conduit means (Patent Document 2) and the connection between the concentrated oxygen outlet and the conduit are composed of a conduit joint made of a non-combustible material (Patent Document 3) have been proposed.

JP 2001-314507 A Patent No. 2598126 JP 2006-280470 A

In oxygen inhalation therapy for patients with respiratory diseases, there is a possibility of ignition of oxygen inhalation openings such as nasal cannula and mouth mask due to smoking, and use of a device near the presence of fire such as a stove. Exists and there is a risk of fire.

The present invention solves the above-mentioned problem, when a user (patient) performing oxygen inhalation therapy or a user's family or a caregiver smokes near a medical oxygen supply device, or at a short distance It is an object of the present invention to provide a medical oxygen supply device having a function of detecting a flame by an ultraviolet sensor provided in a main body when a fire such as a stove is present.

In order to solve the above problems and achieve the object, according to the present invention, there is provided a medical oxygen supply device including a flame sensor and a temperature sensor, which is notified by the control unit when the flame sensor detects a flame. The device is driven to perform the first notification, and when the temperature sensor detects a temperature equal to or higher than the predetermined temperature, the control device drives the notification device to perform the second notification and to stop the oxygen generation device. It is characterized by controlling to. The flame sensor is an ultraviolet sensor, and is provided inside the main body and includes an ultraviolet transmitting window. Further, two or more flame sensors are provided, and the directional axes are different viewing angles. In addition, according to the present invention, there is provided a drive control method for a medical oxygen supply apparatus including a flame sensor and a temperature sensor. When the flame sensor detects a flame, the control unit drives the notification means to perform notification. And a step of driving the notification means by the control unit when the temperature sensor detects a temperature equal to or higher than a predetermined temperature, and a step of stopping the oxygen generation means. The present invention is also a computer-readable storage medium storing a program code of a driving control method for a medical oxygen supply apparatus including a flame sensor and a temperature sensor, and is controlled when the flame sensor detects a flame. A program code for performing notification by driving the notification means by the unit, and a program code for performing notification by driving the notification means by the control unit when the temperature sensor detects a temperature equal to or higher than a predetermined temperature; The computer-readable storage medium further stores a program code of a driving control method for a medical oxygen supply device, characterized by comprising a program code of a step of stopping the oxygen generating means.

As described above, according to the present invention, in the detection of the flame by the flame sensor, only the alert is given, and the oxygen generation is stopped when the temperature sensor provided separately detects the rise in the temperature of the device, It is possible to reduce the occurrence of false alarms and the risk of stopping the medical oxygen supply device due to false alarms. In addition, since two or more flame sensors are provided and the viewing axes are different from each other in viewing angles, a wide range of flames can be detected without blind spots.

It is an appearance perspective view of medical oxygen supply device 1 which is one embodiment of the present invention. 2 is a block diagram that also serves as a piping diagram of the medical oxygen supply apparatus 1. FIG. It is a flowchart figure of the drive control based on the detection of the flame sensor in the medical oxygen supply apparatus 1, and a temperature sensor.

Next, embodiments of the present invention will be described in detail with reference to the drawings. However, the embodiments can be appropriately changed and are not limited to the examples. The medical oxygen supply apparatus of the present invention can use various pressure swing methods such as a PSA method, a VSA method, a VPSA method, and a membrane type as means for obtaining high-concentration oxygen. In this embodiment, the PSA method is used. The medical oxygen supply apparatus using the (positive pressure fluctuation adsorption method) will be described.

FIG. 1A is an external perspective view of a medical oxygen supply device 1 according to an embodiment as viewed from the front left oblique upper side, and FIG. 1B is an XX ′ cross-sectional view of FIG. It is a figure which shows the positional relationship of the ultraviolet sensor 221 and the oxygen exit 7 which are mentioned later. The medical oxygen supply apparatus 1 has a smart and seemingly small travel bag-like appearance that is slender in the vertical direction in order to minimize the installation location. For this reason, consideration is given so as not to let others know that the device is a medical oxygen supply device 1 with a glance.

In addition to the fact that the conventional device has been reduced to a weight of about 3 in weight and pursued energy saving, it can be used with an attached rechargeable battery and a household power source. The rechargeable battery can also be used as a backup power source in the event of a power failure. Further, in the rechargeable battery use mode, when the oxygen flow rate of about 90% or more is set to a predetermined flow rate per minute, for example, 1.25 L or more, oxygen is sent out in synchronism with intake air to save battery power. It has the function of automatically switching to the “tuning mode”.

The front cover 2a and the back cover 2b constituting the main body of the medical oxygen supply apparatus 1 are made of injection-molded resin parts, and other components including the adsorption cylinder are lightened as much as possible so that the total weight is about 10 kg. (When AC carrier is used and no carrier is provided).

As a result, the handle 4 has a handle portion for making it a so-called portable type that can be carried by an adult with one hand, and provided with a handle 4 having a strength sufficient to withstand the force of lifting the medical oxygen supply device 1. Has produced a special feature.

The overall dimensions of the medical oxygen supply device 1 are rounded. Specifically, the width W is 350 mm × the depth D is 250 mm × the height H is 550 mm. For this reason, since the occupation area on a floor surface can be made as small as possible, it is aiming at size reduction with said weight reduction.

Further, as a design feature of the medical oxygen supply apparatus 1, a surface cover 2a that covers the front surface of the medical oxygen supply apparatus 1 three-dimensionally from the installation floor is handled as shown in FIG. While the accent line continuous to the bottom surface of 4 is integrally formed in a concave shape in the vertical direction on the left and right, the portion sandwiched between these accent lines is a light warm color system, and the operation panel 5 of the same color system is disposed above this, The remaining part including the back cover 2b has a beige or cream color.

By adopting a so-called two-tone modern design with the above design and color scheme, when the medical oxygen supply device 1 is installed indoors, it can be harmonized with other furniture such as furniture. Consideration. Further, the front cover 2a and the back cover 2b are made of, for example, ABS resin, which is a thermoplastic resin having impact resistance, thereby ensuring a degree of design freedom. Further, the medical oxygen supply device 1 is placed on the carrier 12 via a bolt 12a, and the caster 12b provided integrally with the carrier 12 facilitates movement in a room or the like.

The operation panel 5 provided in the main body portion of the medical oxygen supply apparatus 1 includes a display unit 128, and is formed at an angle of, for example, about 10 degrees to the joint surface with the back cover 2b at the opening below the handle 4. The power switch 6, the oxygen outlet 7, and the oxygen flow rate setting button 8 are arranged in that order from the left. Above the oxygen outlet 7 is shown a resin coupler 13 which is engaged with a stepped portion formed in the oxygen outlet 7 in an airtight manner and is detachably provided. An opening of an extension tube 15 that forms a part of a cannula having a length of about 1 to 15 m communicates with a coupler 13 that is connected to the oxygen outlet 7 provided in the main body, and a nasal cannula (oxygen inhaler). The 14 openings are set to communicate with each other. The extension tube 15 is made of vinyl chloride resin or the like and has an outer diameter of 5 to 10 mm and an inner diameter of 3 to 6 mm.

The operation panel 5 is provided at a height substantially corresponding to a waist portion where a patient having a standard height (160 to 170 cm) stands with both hands lowered, so that the medical oxygen supply apparatus 1 can be kept standing. Can be operated. For this reason, it is not necessary to sit down and look into each other like a conventional device. Therefore, the burden on the chest and abdomen of the patient is greatly reduced. Furthermore, even a left-handed person can operate without any sense of incongruity because the dials are arranged in symmetrical positions with the oxygen outlet 7 at the center.

A hook (not shown) for hooking the extension tube 15 connected to the nasal cannula (oxygen inhaler) 14 may be provided. The extension tube 15 connected to the nasal cannula 14 has a total length substantially corresponding to the range of movement in the same room where the patient lives. When the extension tube 15 is not used, the extension tube 15 is wound several times and then extended. The tube 15 is hooked on the hook.

Further, for example, even when a patient hits the operation panel 5 violently, safety considerations are taken so as not to get injured. At a position corresponding to the ON position of the power switch 6, for example, an operation state lamp 128 a incorporating a light emitting LED that is lit in green and red is provided. Further, a battery remaining amount display portion 128d is provided on the operation state lamp 128a.

Further, as shown in the figure, the central oxygen outlet 7 is also provided in a recess 5b formed so that most of the enclosed portion is retracted from the operation surface of the operation panel 5 to the back side (the back side in the drawing), and further, a flame sensor. The ultraviolet sensor 221 is attached in the vicinity of the oxygen outlet 7. As the ultraviolet sensor 221, a ZnO ultraviolet sensor, a GaN ultraviolet sensor, an AlGaN ultraviolet sensor, a diamond ultraviolet sensor, or the like is used. The ultraviolet sensor 221 is preferably a medical oxygen supply device so that a predetermined distance from the coupler 13 to the nasal cannula 14, for example, 20 to 50 cm, falls within a predetermined viewing angle (θ), for example, 20 to 45 degrees. 1 is provided on the back surface of the operation panel 5 so as to have the same axis as viewed from the front. The operation panel 5 is provided with an opening 221b in a tapered shape (widely outward) so that the ultraviolet sensor 221 can obtain the predetermined viewing angle. Preferably, the opening 221b has a wavelength. An ultraviolet transmissive window such as borosilicate glass is inserted so as to selectively transmit ultraviolet rays of 185 to 260 nm. On the oxygen outlet 7, an alarm display portion 128 c printed with “inspection” characters is provided. In addition, since the ultraviolet sensor 221 is provided with two or more (preferably two), the directivity with respect to ultraviolet rays and the viewing angle are different from each other, so that the flame can be detected with higher accuracy. Further, the temperature sensor 222 is also provided at an appropriate position of the medical oxygen supply device 1 (in the vicinity of the oxygen outlet 7 in FIG. 1B). As the temperature sensor 222, a semiconductor type temperature sensor using a band gap voltage, a thermopile type infrared sensor, a thermistor, or a thermocouple type temperature sensor is used. Based on the output values from these sensors, the controller 200 converts them into temperature values. Below the alarm display portion 128c, for example, an oxygen lamp 128b incorporating a light emitting LED that is lit in green and red is provided. Moreover, the set oxygen flow rate (L / min) display part 128e is also provided. The battery remaining amount display portion 128d is fully lit for about 2 seconds when the power is turned on. Thereafter, when the remaining amount of the built-in battery 228 is 100%, all of the five levels of light emitting LEDs are turned on. In addition, every time the remaining battery level is reduced by 20%, the light is turned off from the right side and the number of lights is reduced.

When the remaining amount of the built-in battery 228 becomes 10% or less, a lamp with a built-in light emitting LED provided on the left side flashes red (lights intermittently) and warns with a built-in buzzer every 5 minutes. In this way, safety in use in the battery drive mode is ensured particularly when going out. The alarm display section 128c is printed with the letters “check”, and a built-in lamp is lit to notify when the oxygen concentration is lowered. In addition, a buzzer sounds when an abnormality occurs on the device side. In addition, when the device stops due to a power failure, it blinks and notifies the visually impaired person by sounding a buzzer. The oxygen lamp 128b is turned off in green when the oxygen is flowing normally, and is turned off when oxygen is not emitted. When the respiratory state is not detected for a certain time in the respiratory synchronization mode, the light turns red and the buzzer sounds.

When the power switch 6 is turned on, a buzzer sounds and all the lamps are lit in green for 2 seconds. And when using it in battery drive mode, it lights up according to the remaining amount in 5 steps | paragraphs of light emission LED after that. When the patient sets the predetermined flow rate with the oxygen flow rate setting button 8 according to the doctor's prescription, the oxygen supply is started. At the time of stop, when the power switch 6 is turned off, the oxygen lamp 128b is turned off, and the operation lamp 128a flashes for a while and then automatically ends. As a work performed by the patient every day, there is a case where dust and dirt adhering to the outside air introduction filter 22 provided on the back cover 2b are removed with a vacuum cleaner. In order to facilitate this operation, the outside air introduction filter 22 is configured to be easily detachable.

<Description of piping and block diagram of medical oxygen supply device 1>
FIG. 2 is a schematic diagram of the piping illustrated also serving as a block diagram of the medical oxygen supply apparatus 1. In the figure, components that have already been described are denoted by the same reference numerals and description thereof is omitted. The double line in the figure is a pipe 24 that is a flow path for air, oxygen, and nitrogen gas, and is generally indicated by the pipe 24. A thin solid line indicates power supply or electric signal wiring.

Here, in the following description, a case where a horizontally opposed two-cylinder compressor is used as the compressor 10 constituting the oxygen generating means will be described. In addition, the main housing 2 that introduces outside air (air) into the compressor 10 through the intake port 2c and the filter 22 and discharges it to the outside through the exhaust port 2d is shown as a sealed container in the figure by a broken line. Yes.

In FIG. 2, description will be made sequentially along the flow of the introduced air. The raw material air (outside air) enters the compressor 10 located in the soundproof chamber 3 shown by a broken line in FIG. 1 through the air inlet 2c, the filter 22, and the pipe 24.

The filtered raw material air is pressurized by a compression mechanism of the compressor 10 to be described later to become compressed air. At this time, the temperature is raised in an aluminum lower manifold M1 (shown by a broken line) in which the pipe 24 is formed. Since it is sent out and cooled by the heat radiation effect of the lower manifold M1, the blower fan 30 can be downsized. The cooled compressed air is introduced into the first adsorption cylinder 108a and the second adsorption cylinder 108b constituting the oxygen generation means. Thus, as a result of the function of zeolite, which is an adsorbent whose function deteriorates at high temperatures, oxygen can be concentrated to about 90% or more.

The compressed air is alternately supplied to the first adsorption cylinder body 108a and the second adsorption cylinder body 108b, which are arranged in parallel through the pipe 24 as described above. For this reason, the three-way switching valves 109a and 109b, which are switching valves, are connected as shown in the figure. In order to perform a purification process for desorbing unnecessary gases from these three-way switching valves 109a and 109b and the first and second adsorption cylinders 108a and 108b, the three-way switching valves 109a and 109b The pipe 24 is connected as shown in the figure.

Or of the first adsorption cylinder 108a and zeolite catalyst adsorbent are respectively stored in the second adsorption column body 108b _is, X-type Si0 2 / _Al 2 _{O 3} ratio of 2.0 to 3.0 The amount of nitrogen adsorbed per unit weight can be increased by using zeolite which is obtained by binding at least 88% or more of the tetrahedral unit of Al ₂ O ₃ with a lithium cation. In particular, a granule measurement value of about 0.3 to 0.6 mm and a fusion of at least 88% or more of tetrahedral units with a lithium cation are preferable.

By using such a zeolite, it becomes possible to reduce the amount of raw material air required to produce the same oxygen. As a result, the compressor 10 for generating compressed air can be of a smaller type, and further noise reduction can be achieved.

On the other hand, an equal pressure valve 107 including a check valve, a throttle valve, and an on-off valve is branched and connected to the outlet side above the first adsorption cylinder 108a and the second adsorption cylinder 108b as shown in the figure. A product tank 111 serving as a container for storing separated and produced oxygen having a concentration of about 90% or more is connected to the pipe 24 as shown in the figure.

On the downstream side of the product tank 111, a pressure regulator 112, which is a so-called regulator that automatically adjusts the pressure of oxygen on the outlet side to be constant, is piped. An oxygen concentration sensor 114, which will be described later, is connected to the downstream side of the pressure regulator 112 via a pipe 24 so that the oxygen concentration is detected intermittently (every 10 to 30 minutes) or continuously. A proportional opening valve 115 that opens and closes in conjunction with the oxygen flow rate setting button 8 is connected to the downstream side via a pipe 24, and an oxygen flow rate sensor 116 is further connected to the downstream side. A demand valve 117 is connected downstream of the oxygen flow sensor 116 via a negative pressure circuit board 118 for breathing synchronization control, and passes through the sterilization filter 119 to the oxygen outlet 7 of the medical oxygen supply device 1. Are connected to each other. With the above configuration, it is possible to inhale oxygen concentrated to about 90% or more through the nasal cannula 14 and the like at a maximum flow rate of 5 L / min.

Next, the power supply system includes an AC adapter 19 that is connected via the connector 130, an internal battery 228 that is built in the bottom of the main housing 2, and an external that is detachably provided via the connector 131. A battery 227 and a power supply control circuit 226 are included. The internal battery 228 and the external battery 227 are rechargeable secondary batteries, and the internal battery 228 is charged by receiving power from the power supply control circuit 226. The built-in battery 228 can be repeatedly charged and discharged at least about 500 times, and has a management function such as the remaining battery level, the number of charge / discharge cycles used, the degree of deterioration, and the output voltage. What has a management function which can confirm charge capacity and the frequency | count of charging / discharging with an external portable terminal etc. is preferable. In addition, the external battery 227 can be charged by receiving power from the power supply control circuit 226 in a connected state via the connector 131, but is normally repeatedly charged using a separately prepared battery charger. It will be. Or you may prepare as the external battery 227 which integrated the battery charger designed exclusively.

In the configuration of the power supply system described above, the medical oxygen supply device 1 operates in response to the power supply from the AC adapter 19 and the second power supply that operates in response to the power supply from the internal battery 228. The state is automatically switched to one of three power supply states, ie, a third power supply state that operates by receiving power supply from an external battery.

The power supply control circuit 226 is controlled by the central controller 200 so that the priority for this automatic switching is automatically determined in the order of the first power supply state, the third power supply state, and the second power supply state.

In addition, an ID tag code identification circuit 230 may be further connected to the power supply control circuit 226 to prevent a situation where the rechargeable battery runs out when being carried, as will be described later. That is, in order to prevent a situation where the rechargeable battery runs out when being carried, a modular power supply device that connects a plurality of built-in batteries 228 may be used. However, when a plurality of batteries are connected in this way, the power switching means becomes complicated. Moreover, it becomes impossible to monitor power consumption individually.

Therefore, among the plurality of built-in batteries 228,... 228, an identification ID tag code and a charge state detection means are individually provided to enable control to automatically switch from a discharged battery to a fully charged rechargeable battery. Is provided so that a discharged battery can be confirmed and switched to a fully charged battery. Furthermore, the number of batteries to be connected is freely selected according to the time when the battery is desired to be used, thereby improving convenience.

A central control unit (CPU) 200 including a microcomputer stores a program for switching to an optimum operation mode according to the amount of oxygen to be generated. When a large amount of oxygen is generated, the compressor 10, In particular, the built-in battery 228 is preserved by driving the blower fan 30 through the motor control unit 201 and the fan motor control unit 203 which control to rotate at a low speed when oxygen is generated at a low speed. I am doing so. As a result, even when the external battery 227 is forgotten to be charged, it is possible to cope with sudden outings or power outages.

The central control unit 200 incorporates a ROM that stores a predetermined operation program, and is further connected to an external storage device 210, a circuit 207 including a volatile memory, a temporary storage device, and a real-time clock. The stored contents can be accessed by connecting to a communication line or the like via the communication line.

In addition, a control circuit that controls to desorb unnecessary gas in the first adsorption cylinder body 108a and the second adsorption cylinder body 108b by performing on / off control of the three-way switching valves 109a and 109b and the equal pressure valve 107. 208, a flow rate control unit 202 that drives and controls the oxygen concentration sensor 114, the proportional opening valve 115, the flow rate sensor 116, and the demand valve 117 is connected to the central control unit 200. The oxygen concentration sensor 114 may be a galvanic cell type, an ultrasonic type, a zirconia type, or the like, but a zirconia type oxygen concentration sensor is preferable in terms of size and measurement accuracy.

The compressor 10 having a total weight of about 500 g is driven by a variable speed control unit built in the motor control unit 201 so that the driving sound of the DC motor including the outer rotor type electric motor is controlled with a sinusoidal drive waveform. is doing.

The compressor 10 has a function only for generating compressed air as described above, and the rotation speed is automatically controlled according to the oxygen flow rate taken out, and the rotation speed is controlled between 500 rpm and 3000 rpm. Further, the compressor 10 has a performance of compressing air to about 60 to 150 kPa.

The operating temperature surrounding the compressor 10 is 0 ° C. to 40 ° C., and the driving voltage of the compressor 10 is DC 12V or 24V, which is a power source obtained from a cigarette lighter adapter such as an automobile or truck, and the power consumption is , About 30W. For this reason, in the worst case, the power can be supplied by connecting to the connector 131. Since the lower manifold M1 has a heat dissipation / cooling effect, a minimum necessary fan is sufficient, which contributes to noise reduction and power reduction.

As the three-way switching valves 109a and 109b, electromagnetic valves that perform a valve operation generally called a direct acting type by a magnetic force during energization can be used. This type of solenoid valve has a problem of high power consumption because the main valve is operated only by electric power. Therefore, a pilot-type three-way switching valve can be used as the three-way switching valves 109a and 109b. According to this pilot-type three-way selector valve, since it can be operated by using a little power consumption and the air pressure from the compressor, it is reduced from the conventional 8W to 0.5W, so the power consumption is greatly reduced. It will be planned.

Each of the above components can be fixed mainly from one direction as its mounting portion in consideration of the improvement of assembly workability and inspection maintainability of the medical oxygen supply device 1 with reduced noise. Designed to. That is, various control boards, the pressure regulator 112 that automatically adjusts the oxygen pressure to be constant as described above, the oxygen concentration sensor 114, the proportional opening valve 115 on the downstream side of the pressure regulator 112, and the oxygen flow rate sensor 116. The demand valves 117 connected to the negative pressure circuit board 118 for breathing synchronization control can all be fixed from one direction. In particular, components that generate vibration or noise are provided in the soundproof room 3 in a soundproof and vibration-proof state, so that the supply sound of compressed air, the introduction sound of external air, and the filtered air for producing raw air Noise is reduced by preventing the introduction sound and the periodically generated exhaust sound from leaking outside. Further, the operation sound of the three-way switching valve is soundproofed by covering with the soundproofing material (soundproofing sheet) 11 as described above. Further, since the main housing 2 is configured as a hermetic cover having a minimum necessary opening that is introduced into the inside through the air inlet 2c and discharged to the outside through the air outlet 2d, further noise reduction is achieved. It becomes possible to plan.

<Drive control by the control unit based on the flame sensor and temperature sensor>
The ultraviolet sensor 221 as a flame sensor detects a flame, and the temperature sensor 222 detects whether the temperature is a predetermined temperature, for example, 80 ° C. or higher. Based on the detection results of the ultraviolet sensor 221 and the temperature sensor 222, the operation of the compressor 10 and the proportional opening valve 115 or the demand valve 117 are closed in the central control unit 200, and the supply of concentrated oxygen is immediately stopped to perform voice guidance. An electric signal is sent. The central control unit 200 sends an electric signal for stopping the operation of the compressor 10 to the motor control unit 201 based on the electric signal informing the presence or absence of the flame, and the proportional opening valve 115 or the demand to the flow rate control unit 202. An electric signal is sent to close the valve 117 and stop the supply of concentrated oxygen. Further, as a flame detection method of the ultraviolet sensor 221, for example, a flame in which hydrogen burns emits light having a strong ultraviolet wavelength in the range of 185 to 260 nm, and thus detects ultraviolet light having a wavelength in the range of 185 to 260 nm. Thus, the presence or absence of a flame is determined.

FIG. 3 is a flowchart showing an example of an operation description for detecting the flame by the ultraviolet sensor 221 and stopping the operation of the compressor 10 and the supply of the concentrated oxygen when a temperature equal to or higher than a predetermined temperature is detected. . First, when the medical oxygen supply device 1 is activated, the process proceeds to step S11, where it is determined whether detection by the flame sensor has continued for a first predetermined second, for example, 5 seconds or more. When the detection of the flame sensor is the first predetermined second, for example, 5 seconds or more, the process proceeds to step S12, and the voice synthesis IC 250 controlled by the central control unit 200 passes through the speaker 251 as voice guide means that is notification means. Then, a voice guide is executed, and control is performed to perform a first voice guide, for example, “Fire is strictly prohibited during oxygen inhalation”. Next, proceeding to step S13, it is determined whether or not the temperature detection by the temperature sensor 222 is a predetermined value, for example, 80 ° C. or higher. When the detection of the temperature sensor is a predetermined value, for example, 80 ° C. or more, the voice synthesis IC 250 controlled by the central control unit 200 that is a control unit performs voice guidance via a speaker 251 as a voice guide unit that is a notification unit. The control is performed to perform the second voice guide such as “Fire has occurred. Oxygen output is stopped”. Next, it progresses to step S15, the drive of the compressor 10 is stopped by the central control part 200 via the motor control part 201, and the supply of concentrated oxygen is stopped by the flow volume control part 202. In step S11, when the ultraviolet sensor 221 does not detect a flame, the process returns to the original process flow and is repeated from step S11. In step S13, when the detection of the temperature sensor is a predetermined value, for example, less than 80 ° C., the process returns to the original processing flow. In the case where two or more ultraviolet sensors 221 are provided, it is more effective for preventing fire by preferentially processing a value having a long flame detection time (seconds).

<Description of voice guide>
For voice guidance, the voice synthesis IC 250 controlled by the central control unit 200 executes voice guidance via the speaker 251 as voice guidance means. At this time, the speaker 251 only needs to be provided at a position where the voice guide can be easily heard. Therefore, the speaker 251 is not limited to the inside of the medical oxygen supply device 1 and is provided on the surface of the display panel 5 or the medical oxygen supply device 1. May be.

In addition, since the patient always has an additional freshly charged external battery, the patient can go out for a longer time and the QOL at that time is greatly improved. Moreover, you may provide the humidification means (not shown) for adding moisture to the flow of concentrated oxygen through a suitable connection part.

Although the present invention has been described with a medical oxygen supply apparatus using the PSA method (positive pressure fluctuation adsorption method) as an embodiment, other means for obtaining high concentration oxygen include membrane oxygen concentration and oxygen by electrolysis. Any method may be used as long as it is a method for obtaining high-concentration oxygen such as generation, air liquefaction separation, and oxygen generation by chemical reaction.

Claims (5)

A medical oxygen supply device comprising a flame sensor and a temperature sensor,
When the flame sensor detects a flame, the control unit drives the notification unit to perform a first notification, and when the temperature sensor detects a temperature equal to or higher than a predetermined temperature, the control unit drives the notification unit. A medical oxygen supply device that controls to perform the second notification and to stop the oxygen generation means.   The medical oxygen supply apparatus according to claim 1, wherein the flame sensor is an ultraviolet sensor, and is provided inside the main body and includes an ultraviolet transmission window.   3. The medical oxygen supply device according to claim 1, wherein two or more flame sensors are provided and the directional axes have different viewing angles. A drive control method for a medical oxygen supply device including a flame sensor and a temperature sensor,
When the flame sensor detects a flame, the control unit drives the notification unit to perform notification, and when the temperature sensor detects a temperature equal to or higher than a predetermined temperature, the control unit drives the notification unit. A drive control method for a medical oxygen supply apparatus, comprising: a step of performing a notification; and a step of further stopping an oxygen generation means. A computer-readable storage medium storing a program code of a driving control method for a medical oxygen supply device including a flame sensor and a temperature sensor,
When the flame sensor detects a flame, the control unit drives the notification means to notify the program code, and when the temperature sensor detects a temperature equal to or higher than a predetermined temperature, the control unit notifies the notification means. The program code of the step of driving and notifying and the program code of the step of further stopping the oxygen generation means are read by a computer storing the program code of the drive control method of the medical oxygen supply device Possible storage medium.

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