JPH069656Y2 - Steam discharge device for steam sterilizer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The steam discharge device for a steam sterilizer according to the present invention condenses by cooling the high temperature steam discharged from the steam sterilizer after sterilization, and then sewage. It is used to discharge to drainage facilities such as.

(Prior Art) In hospitals and various research facilities, steam sterilizers are used to sterilize used medical devices and patient clothes.

When performing sterilization with a steam sterilizer, after the object to be sterilized is stored in a sterilization container, high temperature steam is fed into the sterilization container to sterilize the bacteria attached to the object to be sterilized. After the sterilization process, after discharging the steam in the sterilization container,
The inside of the sterilization container is evacuated to dry the sterilized material that is wet during the sterilization process.

By the way, since the steam discharged from the sterilization container after the sterilization treatment is still high in temperature, it cannot be discharged as it is into the atmosphere or sewage.

For this reason, conventionally, the steam discharged from the sterilization container is condensed and liquefied by a discharge device such as disclosed in Japanese Utility Model Publication No. 53-25434, and then discharged to sewage or the like.

This conventional discharging device, as shown in FIG.
And the water vapor discharged from the steam sterilizer into the closed container 1
The steam exhaust pipes 2 and 2 to be sent to the air and the lower ends thereof are connected to the ends of the steam exhaust pipes 2 and 2, respectively, and the upper end is opened to the upper part of the closed container 1, and the intermediate part is spirally wound for cooling. Pipes 3 and 3 and a water supply pipe 4 for supplying cooling water into the closed container 1.
And a drain pipe 5 for discharging the water 7 accumulated in the closed container 1.
It consists of and. 6 detects the temperature of the water 7 stored in the closed container 1 and sends a signal to a controller for controlling the supply of cooling water into the closed container 1 and the drainage from the closed container 1. It is a temperature sensor.

When the high-temperature steam discharged from the sterilization container of the steam sterilizer is processed by the conventional discharge device configured as described above, water 7 is stored in the closed container 1 and the steam discharge pipes 2 and 2 are used. High-temperature steam is fed into the cooling pipes 3 and 3.

As a result, the water vapor is cooled and condensed while passing through the spiral portions of the cooling pipes 3 and 3, and then sent out from the upper end openings of the cooling pipes 3 and 3 and mixed with the cooling water 7.

(Problems to be Solved by the Invention) However, in the case of the conventional steam sterilizer steam discharge device configured as described above, the following inconvenience occurs.

That is, in the case of the above-mentioned conventional discharge device, since the long cooling pipes 3 and 3 having the spiral portion are used to surely condense and liquefy the steam, the steam passes through the cooling pipes 3 and 3. It was unavoidable that the resistance when doing was increased.

Moreover, the condensed water generated by the cooling of the water vapor in the cooling pipes 3 and 3 accumulates in the cooling pipes 3 and 3 and is discharged from the openings provided at the upper ends of the cooling pipes 3 and 3. hard. The steam sent from the steam discharge pipes 2, 2 into the cooling pipes 3, 3 is sent into the cooling pipes 3, 3 while pushing up the condensed water accumulated in the cooling pipes 3, 3 in this way. Therefore, it is inevitable that the resistance against the passage of water vapor through the respective cooling pipes 3 is considerably increased.

As a result, the work of discharging the high temperature steam from the sterilization container cannot be performed smoothly after the sterilization process is completed.

The steam discharge device for a steam sterilizer of the present invention eliminates the above-mentioned inconvenience.

(Means for Solving the Problems) A steam sterilizer steam discharge device of the present invention includes a closed container,
A steam discharge pipe for sending the steam discharged from the steam sterilizer into this closed container, and a diffusion provided so as to face the opening of the steam discharge pipe and diffuse the steam discharged from the steam discharge pipe around the opening. A plate, a spray nozzle provided at the upper end of the closed container for spraying cooling water into the closed container, a water supply pipe for supplying the cooling water to the spray nozzle, and a water discharge at the bottom of the closed container. It is composed of a drainage pipe for

(Operation) When the high temperature steam discharged from the sterilization container of the steam sterilizer is processed by the discharge device of the present invention configured as described above, while spraying the cooling water from the spray nozzle provided at the upper end of the closed container. , Eject steam from the steam discharge pipe.

The water vapor ejected from the steam discharge pipe diffuses to the surroundings by the diffusion plate, contacts the cooling water sprayed from the spray nozzle, condenses, accumulates at the bottom of the closed container together with the cooling water, and is discharged through the drain pipe. .

(Embodiment) Next, the present invention will be described in more detail while explaining the embodiment shown in FIG.

A steam discharge pipe 9 for sending water vapor discharged from a steam sterilizer (not shown) into the closed container 8 penetrates through an intermediate wall surface of the cylindrical closed container 8. A portion of the vapor discharge pipe 9 located at the center of the closed container 8 is bent upward so that the end opening is directed upward.

A steam temperature sensor 12 for detecting the temperature of water vapor sent into the closed container 8 through the steam discharge pipe 9 is provided at a portion located outside the closed container 8 in the middle of the steam discharge pipe 9.
And a steam valve 13 that opens and closes the flow path by electric means, such as a motor valve. In this steam valve 13, the steam temperature detected by the steam temperature sensor 12 is a limit temperature (for example, 50
In the case of (C) or higher, the flow path is opened based on a command from a controller (not shown).

On the other hand, the diffusion plate 10 is supported at the central position of the intermediate portion in the vertical direction of the closed container 8 so as to face the end opening of the vapor discharge pipe 9 as described above. The diffusion plate 10 is formed in a watch glass shape as a whole, and is supported by the hermetically sealed container 8 with its lower concave surface facing the end opening of the steam discharge pipe 9.

On the other hand, a shower nozzle-like spray nozzle 11 is provided at the upper end of the closed container 8 facing downward so that cooling water can be freely sprayed into the closed container 8. Reference numeral 14 is a water supply pipe for supplying cooling water to the spray nozzle 11, and this water supply pipe 1
In the middle of 4, a water supply valve 15 and a check valve 16 are provided in series with each other.

The water supply valve 15 is provided with the steam temperature sensor 12 described above.
It is configured to open and close in synchronization with the steam valve 13 based on the signal from the.

Further, an end of a drain pipe 17 for discharging the water 7 accumulated at the bottom of the closed container 8 is opened at the bottom of the closed container 8. And, in the middle of the drain pipe 17, the drain pipe 17
Water temperature sensor 18 for detecting the temperature of water discharged through
A check valve 19 and a drain valve 20 that opens and closes the flow path by an electric means, such as a motor valve, are provided in series with each other.

The drainage valve 20 in the water temperature sensor 18 is provided when the temperature of the water detected by the water temperature sensor 18 is equal to or lower than the second limit temperature (for example, 60 ° C.)
The flow path is opened based on a command from a controller (not shown).

Reference numeral 21 is a vacuum breaker for sucking outside air into the closed container 8 when the pressure inside the closed container 8 is lowered due to the condensation of the water vapor sent into the closed container 8.

When the high temperature steam discharged from the sterilization container of the steam sterilizer is treated by the discharge device of the present invention configured as described above, while spraying the cooling water from the spray nozzle 11 provided at the upper end of the closed container 8. , Steam is ejected from the steam discharge pipe 9.

That is, when the steam discharge from the sterilization container is started, the temperature of the steam discharge pipe 9 rises and the temperature detected by the steam temperature sensor 12 exceeds a predetermined limit temperature (50 ° C.).

As a result, the steam valve 13 and the water supply valve 15 are opened based on a command from the controller, and high-temperature steam is jetted from the end of the steam discharge pipe 9 and, at the same time, cooling water is sprayed from the spray nozzle 11.

The water vapor ejected from the end opening of the vapor discharge pipe 9 rises in the closed container 8 while being diffused to the surroundings by the diffusion plate 10 provided facing the end opening. Then, during this rising, the cooling water sprayed from the spray nozzle 11 comes into contact with the cooling water to condense, collect together with the cooling water at the bottom of the closed container 8 and be discharged through the drain pipe 17.

Since new steam is successively sent into the closed container 8 through the steam discharge pipe 9, the inside of the sterilized container 8 has a positive pressure during the discharge of the steam from the sterilized container and is accumulated at the bottom of the closed container 8. Water 7 is drain pipe 1 without using a pump, etc.
It is pushed into 7.

When the temperature of the water 7 accumulated at the bottom of the closed container 8 becomes high as a result of condensing a large amount of water vapor, when this water 7 is directly sent to a drainage facility, it is made of a material having no heat resistance such as vinyl chloride. Drainage facilities may be damaged.

Therefore, in the case of the present embodiment, when the temperature of the water discharged from the drainage pipe 17 exceeds the second limit temperature (for example, 60 ° C.), the drainage valve 20 is closed and the high temperature water is drained. To be sent to. At the same time, the steam valve 13 provided in the middle of the steam discharge pipe 9 is closed to prevent steam of high temperature and high pressure from being fed into the closed container 8. However,
The water supply valve 15 provided in the middle of the water supply pipe 14 is kept open to reduce the temperature of the water 7 remaining in the closed container 8.

As a result, if the water temperature detected by the water temperature sensor 18 becomes equal to or lower than the second limit temperature, the drain valve 20 and the steam valve 1 are restarted.
3 and are opened, and the treatment of the discharged steam is restarted.

(Effect of the Invention) Since the steam discharge device for a steam sterilizer of the present invention is configured and operates as described above, it is possible to reliably condense and liquefy high temperature steam without increasing resistance in the steam discharge path. The steam can be efficiently discharged from the sterilization container, and the time required for steam discharge can be shortened.

[Brief description of drawings]

FIG. 1 is a schematic vertical cross-sectional view showing an embodiment of a steam sterilizer steam discharge device of the present invention, and FIG. 2 is a vertical cross-sectional view showing an example of a conventional steam discharge device. 1: Closed container, 2: Steam discharge pipe, 3: Cooling pipe, 4: Water supply pipe, 5: Drain pipe, 6: Temperature sensor, 7: Water, 8: Closed container, 9: Steam discharge pipe, 10: Diffusion plate , 11: Spray nozzle, 12: Steam temperature sensor, 13: Steam valve, 14: Water supply pipe, 15: Water supply valve, 16: Check valve, 17: Drain pipe, 1
8: Water temperature sensor, 19: Check valve, 20: Drain valve, 21:
Vacuum breaker.

Claims (3)

[Scope of utility model registration request] 1. A closed container, a steam discharge pipe for sending water vapor discharged from a steam sterilizer to the closed container, and a steam discharge pipe provided so as to face an opening of the steam discharge pipe. A diffusion plate for diffusing around the opening, a spray nozzle provided at the upper end of the closed container for spraying cooling water into the closed container, a water supply pipe for supplying cooling water to the spray nozzle, and a closed container A steam discharge device for a steam sterilizer, which comprises a drain pipe for discharging the water accumulated at the bottom of the. 2. A steam temperature sensor for detecting the temperature of water vapor sent into the closed container through the steam discharge tube and a steam valve for opening and closing the flow path, and a flow path for the water supply tube. The steam discharge device for a steam sterilizer according to claim 1, wherein water supply valves for opening and closing are provided respectively, and the steam valve and the water supply valve are opened when the steam temperature detected by the steam temperature sensor is equal to or higher than a limit temperature. 3. A water temperature sensor for detecting the temperature of water discharged through the drain pipe and a drain valve for opening and closing the flow path are provided in the middle of the drain pipe, and the water temperature detected by the water temperature sensor is the steam temperature. The drain valve is opened when the temperature is equal to or lower than a second limit temperature higher than the limit temperature detected by the sensor, and the drain valve and the steam valve are closed when the temperature of water is equal to or higher than the second limit temperature. The steam discharge device for a steam sterilizer described.