JPH0647473Y2 - Inhalation cooling system for circulating respirator - Google Patents

Description

FIELD OF THE INVENTION The present invention relates to a device for cooling inhalation in a respirator.

2. Description of the Related Art Conventionally, exhaled air is guided to a cleaning can to absorb and remove carbon dioxide contained in the exhaled air, and is reused as part of inhalation. This intake air is supplemented with oxygen from the pressure vessel.

In a clean can, carbon dioxide is removed by a chemical reaction, which is an exothermic reaction. Therefore, the temperature of the intake air rises, and also when the temperature of the environment of use is high, the temperature of the intake air also rises.

Problems to be Solved by the Invention When the temperature of the inspiratory air rises, the user of the respiration system becomes uncomfortable with breathing, and becomes difficult to breathe, especially when performing intense activity.

SUMMARY OF THE INVENTION An object of the present invention is to provide an intake air cooling device for a circulation type respirator, which allows comfortable breathing without increasing the temperature of the intake air.

Means for Solving the Problems The present invention relates to an inhalation cooling device for a circulation type respirator that uses exhaled air as a part of inhalation by absorbing carbon dioxide with a cleaning can and is partitioned by a heat transfer wall in the middle of the inspiration path. Intake has been inserted into the space defined by one surface of the heat transfer wall, and frozen refrigerant can be freely stored in the space defined by the other surface. It is a characteristic inhalation cooling device for a circulation type respirator.

Operation According to the present invention, two spaces are formed by the heat transfer wall of the intake air cooling device, one space is supplied with intake air, and the other space is stored with the frozen refrigerant. Are cooled by the refrigerant. Therefore, the rise in intake air temperature can be suppressed.

The rise in the temperature of the intake air is caused by, for example, a chemical reaction for removing carbon dioxide in the cleaning can and a rise in the temperature of the environment in which the respiratory system is used. Therefore, in the present invention, there is no abnormal rise in intake air, and comfortable use can be continued.

Embodiment FIG. 1 is a front view of an embodiment of the present invention, and FIG. 2 is a side view thereof. Exhalation from the breathing tube connection port 2 of the face piece 1 is guided from the flexible exhalation tube 3 through the pipe joint 4, the connecting pipe 5 and the pipe joint 6 to the clean can 7 and is exhaled in the clean can 7. Carbon dioxide is removed. Exhaled air from the cleaning can 7 is guided to a flexible breathing bag 8. An automatic exhaust valve 9 is attached to the breathing bag 8 so that part of the exhaled air is discharged to the outside. The gas from the breathing bag 8 is guided to the automatic supply valve 10. Compressed oxygen from the pressure vessel 11 is replenished at a constant flow rate from the block valve 12 through the pressure reducing valve 13 to the constant quantity reinforcing nozzle 14 to the automatic replenishment valve 10, and thus is aspirated from the automatic replenishment valve 10 through the flexible pipe 15. Is guided. The intake air from the pipe 15 is cooled by an intake air cooling device 16 and is used from the intake pipe 17 through the face piece 1.

The belt 19 is used for mounting the face piece 1 on the user's face. The belt 20 is attached to the support member 21, and is wound around the user's shoulder or the like to carry the support member 21 on his back. The cleaning can 7, the breathing bag 8, the pressure vessel 11 and the like are fixed to the support member 21, and the intake cooling device 16 is fixed by a mounting piece 23 and a pipe joint 28.

FIG. 3 is a sectional view of the intake air cooling device 16, and FIG. 4 is an exploded perspective view thereof. The casing 24 includes a tubular portion 24a and a tubular portion 2
An end plate 24b that closes one end of 4a and a connecting piece 24c that is airtightly brazed to the other end of the tubular portion 24a are included. The tubular portion 24a is
The bulging portion 25 is continuous in the circumferential direction, and the strength is improved by this. An inner screw 26 is engraved on the connection piece 24c, and a heat transfer wall 27 is housed in the casing 24. The heat transfer wall 27 is
It has a straight cylindrical tubular portion 27a and an end plate 27b that closes one end thereof, and the other end of the tubular portion 27a made of a material having good thermal conductivity such as copper or brass is airtight to the connection piece 24c. It is brazed and welded.

FIG. 5 is a sectional view taken along the section line V-V in FIG. Pipe fittings 28, 29 are provided in the tubular portion 24a of the casing 24. Having a pipe joint 28, a packing 66 and a bag nut 30,
The pipe 15 is screwed and brazed and welded to the connecting pipe 31 so as to be detachably connected. An external thread 32 is engraved on the pipe joint 29,
A bag nut 67 provided on 17 is screwed to be detachably connected.

The connection member 33 partitions the two spaces 34, 35 by a partition member 36, the space 34 communicates with the space 35, and the space 35 communicates with the intake pipe 17. A fin 37 for partitioning is formed over the entire length of the tubular portion 27a of the casing 27, and the fin 37 is airtightly connected at a connecting position 38 which is continuous with the partitioning member 36. Tube
A plurality of fins 39 extending along the axial direction are connected to 27a, and the fins 39 are in contact with the inner peripheral surface of the tubular portion 24a. As a result, the tubular portion 27a and the tubular portion 24a are held concentrically, and the heat exchange efficiency of the intake air flowing from the pipe 15 through the space 34 to the intake pipe 17 from the spaces 40, 35 can be improved. A lid 43 having an external screw 42 is detachably attached to the connecting piece 24c.

FIG. 6 is a sectional view of the vicinity of the drain plug 60 provided in the casing 24. A tubular body 62 having an outer screw 61 engraved on the outer peripheral surface thereof is brazed and welded to the casing 24. The cylindrical body 62 has a drain hole 63, and the drain hole 63 communicates with the space 40.
A cap 65 having an inner screw 64 engraved on the inner peripheral surface thereof is screwed onto the cylindrical body 62. With such a drain plug 60,
Even if condensation is formed on the outer peripheral surface of the heat transfer wall 27, the water droplets can be extracted to the outside from the drain hole 63.

7 is a sectional view taken along the line VII-VII in FIG. 3, and FIG. 8 is a sectional view taken along the section line VIII-VIII in FIG. The connecting pipe 5 is surrounded by a supporting piece 71 fixed to the intake air cooling device 16 and a fixing belt 72 extending from the supporting piece 71, and the fixing belt 72 is fixed by a bolt 73 and a nut 68. It As a result, the connecting pipe 5 is fixed at a fixed position.

FIG. 9 is a perspective view of the vicinity of the positioning member 44 fixed to the end plate 27b of the heat transfer wall 27. The positioning member 44 is fixed to the end plate 27b of the heat transfer wall 27. The positioning member 44 can be in contact with the end plate 24b to maintain a constant gap between the outer peripheral surface of the heat transfer wall 27 and the inner peripheral surface of the casing 24.

FIG. 10 is a perspective view of the cooling means 47, and FIG. 11 is a vertical sectional view thereof. The cooling means 47 is a hermetically sealed can body, in which a gas region 48 is partially provided inside a right cylindrical shape and a refrigerant 49 is stored therein. A plurality of the cooling means 47 is put in the freezer to freeze the refrigerant 49. The gas region 48 is for preventing the cooling means 47 from being damaged when the refrigerant 49 is frozen.
A plurality of cooling means 47 are stored in the heat transfer wall 27 by opening the lid 43, and the heat transfer wall 27 is cooled by closing the lid 43,
The intake air in the space 40 is cooled. Since the cooling means 47 is divided into a plurality of parts in the axial direction, its strength is improved and deformation due to impact force or the like is prevented.

FIG. 12 is an exploded perspective view of the cooling means 50 of another embodiment. The cooling means 50 has a bottomed cylindrical main body 51 and a lid 52. The lid 52 is made of synthetic resin, for example. The lid 52 includes a plug 53 and an end plate 54. The plug body 53 has elasticity and is a hole formed in the inward flange 55 of the main body 51.
56 can be fitted / removed in an airtight manner.

FIG. 13 is a sectional view showing a state in which the lid body 52 is attached to the main body 51 of the cooling means 50. A coolant such as water is stored in the main body 51 and is frozen in a freezer. At this time, the lid 52 is airtightly fitted in the main body 51. At the time of use, the lid 52 is first removed, a plurality of them are housed in the heat transfer wall 27, and the lid 43 is closed to cool the heat transfer wall 27 and cool the intake air in the space 40. During use, the ice blocks in the main body 51 are gradually melted, and the melted water is collected between the outer peripheral surface of the main body 51 and the heat transfer wall 27 to promote heat transfer, so that heat exchange efficiency can be improved.

Advantageous Effects According to the present invention, two spaces are formed by the heat transfer wall, one space is supplied with intake air, and the other space stores frozen refrigerant. Thereby, the intake air can be cooled by the refrigerant. Therefore, the rise in intake air temperature can be suppressed, and the temperature of the intake air will rise due to the heat generated by the chemical reaction for absorbing carbon dioxide in the cleaning can and the increase in the temperature of the environment in which the respiratory system is used. Can be suppressed, and a comfortable use state can be maintained.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention, FIG. 2 is a side view thereof, FIG. 3 is a sectional view of an intake air cooling device 16, FIG. 4 is an exploded perspective view thereof, and FIG. 6 is a sectional view taken along section line VV of FIG. 6, FIG. 6 is a sectional view near the drain plug 60 provided in the casing 24, and FIG. 7 is a sectional view taken along section line VII-VII of FIG. 8 is a sectional view taken along the section line VIII-VIII in FIG. 7, FIG. 9 is a perspective view near the positioning member 44 fixed to the end plate 27b of the heat transfer wall 27, and FIG. 10 is cooling. FIG. 11 is a perspective view of the means 47, FIG. 11 is a sectional view thereof, FIG. 12 is an exploded perspective view of a cooling means 50 of another embodiment, and FIG.
FIG. 5 is a cross-sectional view showing a state in which 52 is attached. 1 ... Face piece, 2 ... Breathing pipe connection port, 3 ... Exhalation pipe, 4,6 ... Pipe joint, 7 ... Clean can, 16 ... Intake cooling device, 24 ... Casing,
27 ... Heat transfer wall, 34, 35, 40 ... Space, 37, 39 ... Fin, 47, 50 ...
Cooling means

Claims (1)

[Scope of utility model registration request] 1. An inhalation cooling device for a circulation type respirator, which uses exhaled air as a part of inhalation by absorbing carbon dioxide with a cleaning can, and has two spaces partitioned by heat transfer walls in the middle of an inhalation path. Inhalation is inserted into the space defined by one surface of the heat transfer wall, and frozen refrigerant is stored in the space defined by the other surface so as to be freely extracted. Intake cooling system.