JPS60129051A - Steam pasturizer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an improvement in a steam sterilizer for sterilizing objects to be sterilized, such as injection needles, at saturated steam pressure.

Structure of the conventional example and its problems In the water supply device of the conventional steam sterilizer, the water supply pulp is opened and water for evaporation is supplied from the water tank to the can body. The electric current flowing through the water supplied between the bodies is detected, the water supply pulp is closed, the water supply is stopped, and evaporation water is supplied up to a predetermined water level inside the can body.

Originally, in water supply systems using the conventional seed method, conduction current could be detected through water by short-circuiting the electrode and the metal can with a metal object to be sterilized, or by forming an insulating film due to adhesion of scale, etc. It becomes impossible. As a result, water for evaporation is not supplied or water supply cannot be stopped at a predetermined water level, resulting in inconveniences such as water overflowing into the can.

Purpose of the Invention Therefore, the present invention solves the drawbacks of the conventional example by setting a one-hour confirmation timer and one-hour safety timer when water is supplied, and detecting water supply abnormalities and water level abnormalities to open the power supply line. The purpose is to provide a safe and reliable steam sterilizer by shutting down the operation.

Structure of the Invention In order to achieve this object, the present invention adopts an electrode type water level detection system, introduces a timer control device during water supply, and provides a confirmation timer and a safety timer. In addition, inconveniences such as overflow can be avoided.

Description of examples An embodiment of the present invention will be described below based on the accompanying drawings.

In Fig. 1, 1 is a metal can of a steam sterilizer, and an electric heater 2. An electrode 3 for water level detection is provided, and the electrode 3 is connected to a current detector 4.

5 is a water tank that stores water for evaporation, and a solenoid valve 6 for water supply.
It is connected to the bottom of the can body 1 through a conduit 7. Note that 8 is a lid configured to seal the open end of the can body 1. Figure 2 is the electrical circuit diagram of this steam sterilizer.
゜ is a relay switch linked with the above-mentioned current detector 4, 1
1 is a timer control section having sequence characteristics as shown in FIG. 3, and 12 is a relay switch that operates in conjunction with the timer control section 11. 13 is a main switch, and 14 is a relay switch configured to operate after the water supply sequence of the timer control section 11 is completed.

Figure 3 is a water supply sequence diagram, where t is the net water supply time, T1
is a confirmation timer of one hour, T is a safety timer of one hour, and has a margin time T2.

Since the configuration is as described above, the main switch 13
When the circuit is closed, the timer control section 11 starts operating and closes the relay switch 12. Therefore, the current detector 4 is activated, the relay switch 1o is closed, the water supply electromagnetic valve 6 is opened, and the water stored in the water tank 5 is supplied from the bottom of the can body 1 through the pipe 7. . The water level gradually increases at the bottom of the can body 1, and when the liquid level rises to the detection part of the electrode 3, a current flows between the electrode 3 and the can body 1 through the water, and a signal is input to the current detector 4, which triggers a relay. Open switch 1○. Therefore, the electromagnetic valve 6 is closed and the water supply is stopped. Next, after the margin time T2 has elapsed, the relay switch 14 is closed by the timer control section 11, the electric heater 2 is energized, and steam is generated to perform sterilization.

Here, if there is a current detected by the current detector 4 within one hour T1 of the confirmation timer, and if no current is detected within one hour T of the safety timer, the timer control unit 11 opens the cylinder switch 12. to cut off the electrical circuit and stop the equipment from operating.

Effects of the Invention As is clear from the above explanation, according to the present invention, when supplying water for evaporation, it is possible to prevent abnormal heating and damage to the heater due to insufficient water supply, etc., and to prevent damage by supplying water above a predetermined water level. To provide a steam sterilizer that has a safe and reliable sterilization effect without submerging sterilized objects in water.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a steam sterilizer showing an embodiment of the present invention;
Figure 2 is an electric circuit diagram, and Figure 3 is a sequence diagram of the timer control section.〇1... Can body, 2... Electric heater, 3
...Electrode, 4...Current detector, 5...
...Water tank, 6...Solenoid valve, 11...
...Timer control section, 10, 12.14...
・Relay switch. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
figure

Claims (1)

[Claims] An electric heater for heating and an electrode for water level detection are installed at the bottom of the can body, and water is supplied from the bottom of the can body from the water storage tank via electromagnetic pulp.When water is supplied, a timer control unit and a relay switch are used to confirm that the timer is safe for one hour. Set the timer for one hour,
A steam sterilizer configured to detect water supply abnormality and water level abnormality and open an electric circuit based on a signal from a current detector connected to the water level detection electrode within the time period.