JP2001190670A - Gas-supplying device for breathing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas-supplying device for breathing equipped with a flow setting device which causes no blow-off by residual pressure when exchanging gas cylinders and ensures the safety of the exchange operation. SOLUTION: The gas-supplying device for breathing is equipped with an oxygen cylinder and a flow setting means and supplies oxygen to the user's cannula. Here, the flow setting means is equipped with a depressurizing means and a flow control means, and the depressurizing means has a depressurizing valve at its lower-pressure side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a respiratory gas supply device for supplying oxygen from an oxygen cylinder to a patient with a respiratory disease. More specifically, it is possible to easily and safely release the residual oxygen pressure existing between the flow rate setting device and the cylinder when replacing the oxygen cylinder used when the patient with chronic respiratory disease performs oxygen inhalation therapy. The present invention relates to a respiratory gas supply device provided with a flow setting device.

[0002]

2. Description of the Related Art One of the most effective treatments for respiratory diseases such as emphysema and chronic bronchitis is oxygen inhalation therapy. In recent years, an oxygen-enriched air supply device or an oxygen cylinder has been used for this therapy. It has come to be used. When performing the inhalation therapy in a hospital or home, an oxygen-enriched air supply device or a large-capacity fixed oxygen cylinder is used, but when the patient goes out to hospital or the like, a portable oxygen cylinder is used. Can be

[0003] Since this is a cylinder carried by patients with respiratory diseases, it must be small and lightweight, and is filled with high-pressure oxygen gas in order to increase the amount of oxygen that can be filled. Also, in order to further extend the time that the patient can use, a demand regulator that incorporates a breathing sensor and an automatic open / close valve inside, supplies oxygen only during the patient's inspiration time, and stops supply during the expiration time. Means to save oxygen are used.

[0004] Such a high-pressure oxygen cylinder is supplied with oxygen as a continuous flow or in synchronization with respiration through a demand regulator after setting a prescribed flow rate for a physician via a flow setting device. Of course, replacement of these oxygen cylinders used at home is usually performed by the patient who is the user or his caregiver. The replacement of the oxygen cylinder container is performed by removing the flow setting device from the empty cylinder and then attaching the flow setting device to the filled high-pressure oxygen cylinder.

[0005]

Usually, a portable oxygen cylinder for medical use is filled with oxygen at a high pressure of 15 MPa or 20 MPa. When replacing the oxygen cylinder, besides when the cylinder is emptied, the approximate remaining amount of oxygen in the cylinder (residual pressure) is compared with the amount of use during the time of going out. There are cases where there is.
If there is residual oxygen pressure in the cylinder, close the main valve of the cylinder when replacing the cylinder, set the flow setting device to zero, or turn off the demand regulator connected to it and close the automatic open / close valve. The residual pressure remains in the flow setting device, and when the flow setting device is removed from the cylinder, a phenomenon occurs in which several hundred ml of oxygen is blown out. Normally, only a shoe sound is emitted, but if there is a fire in the surroundings, or if static electricity is accumulated in a dry state, there is a possibility that danger such as flashing or firing may occur.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to provide a respiratory gas supply apparatus having a flow setting device which can replace a cylinder more safely. Things. As a result of intensive studies on such a problem, the present inventors have found a respiratory gas supply device provided with the following flow setting device.

That is, according to the present invention, there is provided a respiratory gas supply device comprising an oxygen cylinder and a flow rate setting means for supplying oxygen to a user's cannula, wherein the flow rate setting means comprises a pressure reducing means and a flow rate adjusting means, A respiratory gas supply device characterized in that a pressure release valve is provided on the low pressure side.

Further, the present invention provides a breathing gas supply device characterized in that such a pressure relief valve is provided upstream of the flow rate adjusting means.

The present invention also provides a respiratory gas supply device characterized in that the pressure relief valve is a self-returning push button valve.

Further, the present invention relates to a medical oxygen gas flow rate setting device provided with a pressure reducing means and a flow rate adjusting means, wherein a self-return type pusher is provided on the low pressure side of the pressure reducing means and upstream of the flow rate adjusting means. A medical oxygen gas flow rate setting device comprising a button-type pressure release valve is provided.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the respiratory gas supply device of the present invention will be described with reference to the drawings. As shown in the schematic diagram of FIG. 1, the respiratory gas supply device of the present invention includes an oxygen cylinder and a flow rate setting means, and supplies oxygen to a user's cannula.

The oxygen cylinder in the respiratory gas supply device of the present invention is an oxygen cylinder as an oxygen supply source used in home oxygen therapy, and is a cylinder filled with high-pressure oxygen or a liquid acid cylinder.

The high-pressure oxygen is not used at the same pressure, but is once reduced to a low pressure and then supplied through a flow regulator. In the apparatus of the present invention, a flow setting device having a pressure reducing mechanism is used. In the flow setting device used for the oxygen cylinder for medical use, such a pressure reducing function unit has a volume of 1 to 2 ml, and the residual oxygen pressure remaining in this portion causes gas blowing at the time of replacing the cylinder. When replacing the cylinder, such a flow setting device needs to be removed from the container valve and a new cylinder must be attached to the container valve. When removing from the container valve, the inside of the flow setting unit may be at the same pressure as the cylinder internal pressure.If the cylinder is at a high pressure, the flow setting unit should be connected to the container with the residual gas inside the flow setting unit. When removed from the valve, high pressure oxygen will blow out instantaneously.

As shown in FIG. 2, in the flow setting device of the present invention, by providing a pressure release valve on the low pressure side of the flow setting device having a pressure reducing function, the valve can be opened before removing the flow setting device. Thus, the residual gas in the flow setting device can be safely removed at a low pressure.

Preferably, such a pressure relief valve is provided upstream of a flow rate setting function unit such as an orifice as shown in FIG. 2, for example, so that residual gas can be instantaneously released regardless of the set flow rate. Although it can be provided downstream of the flow rate setting mechanism, it has a demerit that the time required for depressurization differs depending on the set flow rate.

As the pressure release valve used in the present invention, various types can be used. Among them, it is preferable to use a self-returning type push button valve using a spring means or the like as shown in FIG. By using such a push-button type having a self-closing valve, operation errors such as forgetting to recover after depressurization can be eliminated, and operability can be improved.

In the respiratory gas supply device provided with such a flow setting device, in order to replace the cylinder, after closing the main valve of the cylinder, first, a pressure release valve (push button) attached to the flow setting device body is set to a predetermined pressure. By pressing for a long time, the residual gas after the container valve is released at a low pressure, and then the exchange work can be performed without blowing out the high-pressure gas by loosening the tightening of the yoke-tightening type flow setting device.

[Brief description of the drawings]

FIG. 1 shows an embodiment of a breathing gas supply device according to the present invention.

FIG. 2 is a cross-sectional view of a flow rate setting device used in the respiratory gas supply device of the present invention.

FIG. 3 is a sectional view of a pressure relief valve of the flow setting device according to the present invention.

Claims (4)

[Claims] 1. A respiratory gas supply device comprising an oxygen cylinder and a flow rate setting means for supplying oxygen to a user's cannula, wherein the flow rate setting means comprises a pressure reducing means and a flow rate adjusting means, and a low pressure side of the pressure reducing means. A respiratory gas supply device, further comprising a pressure relief valve. 2. The respiratory gas supply device according to claim 1, wherein said pressure relief valve is provided upstream of said flow rate adjusting means. 3. The respiratory gas supply device according to claim 1, wherein said pressure release valve is a self-returning type push button type valve. 4. A medical oxygen gas flow rate setting device comprising a pressure reducing means and a flow rate adjusting means, wherein a self-return type push button type pressure is provided on a low pressure side of the pressure reducing means and upstream of the flow rate adjusting means. A medical oxygen gas flow rate setting device comprising a drain valve.