JPS644329Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a breath testing device, and more particularly to the structure of a valve device that allows easy switching between tasks such as collecting, analyzing, and exhausting breath.

Conventionally, most exhaled breath analyzes have been performed using the Douglas-Bagg method. According to the Douglas Batsug method, exhaled air can be analyzed after being appropriately mixed, so the reliability of the analysis is high. However, the Douglas bag method requires a large number of bags, which not only takes time and effort, but also requires a large amount of space for arranging the bags.

Therefore, the general purpose of the present invention is to make the work of collecting, analyzing, and exhausting exhaled air into one cycle, and to immediately analyze and exhaust the collected exhaled air, thereby making it possible to significantly reduce the number of bugs. The aim is to provide a breath testing system that

A specific object of the present invention is to provide an exhaled breath sampling valve suitable for achieving the above objects.

Examples will be described below with reference to the drawings.

FIG. 1 schematically shows the overall configuration of a breath testing device using an embodiment of the breath sampling valve according to the present invention. Exhaled air blown from the mouthpiece 1 is collected in a chamber 2, passes through a flow meter 3, and flows into an exhaled breath sampling valve 6 mounted on an upper base 5 of a frame 4. For example, three bags 7a, 7b, and 7c are connected to the exhaled breath sampling valve 6. When the switching knob 8 is rotated, the exhaled breath sampling valve 6 opens the inflow pipe 9.
are sequentially connected to the bags 7a, 7b, and 7c. Bags 7a, 7b, which collected exhaled air in this way,
7c are also connected in sequence to the analyzer 11 when the switching knob 8 is rotated, and then connected in sequence to the vacuum pump 12 for evacuation. Details of these connections will be clarified later.

Figures 2 and 3 now show details of one embodiment of an exhaled breath sampling valve. This exhaled breath sampling valve 6 includes a cylindrical body 13 with a bottom, and a cylindrical body 1 with a bottom.
3, a cylindrical body 14 rotatably fitted into the interior of the cylindrical body 14;
A ring-shaped lid 15 that prevents the cylindrical body 14 from coming off
Contains. At the boundary between the inner surface of the circumferential wall of the cylindrical body 13 and the outer circumferential surface of the cylindrical body 14, three ring-shaped spaces 16 are provided with positions shifted from each other along the axial direction. Each of these ring-shaped spaces 16 is substantially sealed individually by several seal rings 17. Although the ring-shaped space 16 is obtained by forming a ring-shaped groove on the outer circumferential surface of the cylindrical body 14 in the figure, it can also be obtained by forming a ring-shaped groove on the inner circumferential surface of the cylindrical body 13. be able to.

Further, in the peripheral wall of the cylindrical body 13, three horizontal holes 18 are connected to the three ring-shaped spaces 16 in a one-to-one correspondence.
are formed at an angle of 120° to each other. Connecting tubes 19 for connecting the inflow pipe 9, analyzer 11, and vacuum pump 12 shown in FIG. 1 are attached to each of these horizontal holes 18. Furthermore, three vertical holes 21 are formed in the bottom wall of the cylindrical body 13 on the same circumference around the cylinder axis. These vertical holes 21 angularly match the horizontal holes 18 one-to-one. Each of these vertical holes 21 also has a first
A connecting tube 22 for connecting the bags 7a, 7b, and 7c shown in the figure is attached.

On the other hand, three through holes 23 bent at right angles in the middle are formed in the cylindrical body 14 at positions making an angle of 120 degrees with each other. These through holes 23 are also connected to the three ring-shaped spaces 16 in a one-to-one correspondence. Note that 24 is a seal ring.

In such an exhalation sampling valve 6,
When the switching knob 8 fixed to the cylindrical body 14 is rotated, the three ring-shaped spaces 16 are selectively connected to the three vertical holes 19 through the through holes 22 depending on the rotation angle selected at that time. It can be communicated. That is, by rotating the knob 8 by 120 degrees, the objects to be connected between the connecting tubes 19 and 22 can be sequentially switched as shown in FIGS. 4 to 6.

Now, in the state shown in Fig. 4, the bag 7a is connected to the inflow pipe 9 to collect exhaled air, the bag 7b is connected to the analyzer 11, and the bag 7c is connected to the vacuum pump 12 to collect the analyzed air. Exhaled air is expelled.
When the knob 8 is rotated 120 degrees in the direction of the arrow, the bag 7a is connected to the analyzer 11 as shown in FIG.
The bag 7b is connected to the vacuum pump 12, and the bag 7c
Exhaled air is collected in the air. When the knob 8 is further rotated 120 degrees in the same direction, the bag 7a is connected to the vacuum pump 12, as shown in FIG.
The exhaled air is collected in the bag 7b and the bag 7c is connected to the analyzer 11. Needless to say, if it is rotated a further 120 degrees, it will return to the state shown in Figure 4. In this way, the three bags are sequentially collected, analyzed, and evacuated.

As described above, according to the exhaled breath sampling valve of the present invention, there is no need to separate the bag each time an analysis is performed, which saves a considerable amount of time and effort. Furthermore, collection, analysis, and evacuation of exhaled air can be performed simultaneously in different bags, making it possible to perform exhaled breath tests efficiently.

In the above description, a case has been described in which there is one analyzer and three bags, but it goes without saying that various design changes can be made depending on the number of bags.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of the entire breath testing device using an embodiment of the exhaled breath sampling valve according to the present invention, Fig. 2 is a sectional view of one embodiment of the exhaled breath sampling valve, and Fig. 3 shows a part of the same. The exploded perspective view and FIGS. 4 to 6 are diagrams for explaining the operation. 6...Exhalation sampling valve, 7a, 7b, 7c
...Bag, 8...Switching knob, 9...Inflow pipe, 11...Analyzer, 12...Vacuum pump, 13
... Cylindrical body, 14 ... Cylindrical body, 16 ... Ring-shaped space, 17 ... Seal ring, 18 ... Horizontal hole, 1
9... Connection tube, 21... Vertical hole, 22... Connection tube,
23...Through hole.

Claims (1)

[Scope of utility model registration request] It includes a cylindrical body with a bottom and a cylindrical body rotatably fitted into the cylindrical body, and substantially every one of the cylindrical bodies is provided at the boundary between the inner surface of the peripheral wall of the cylindrical body and the outer peripheral surface of the cylindrical body. A plurality of hermetically sealed ring-shaped spaces are provided at positions offset from each other along the axial direction, and the cylindrical body has a plurality of ring-shaped spaces formed on the peripheral wall so as to communicate with the plurality of ring-shaped spaces, respectively. A horizontal hole and a plurality of vertical holes formed in the bottom wall so as to be located on the same circumference around the cylindrical axis are provided, and the plurality of ring-shaped spaces are formed in the cylindrical body by selecting the rotation angle. An exhaled breath sampling valve characterized in that a plurality of through holes are formed that can selectively communicate with a plurality of vertical holes.