JP2006280427A - Steam sterilization device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a steam sterilization device capable of surely preventing the pressure destruction of a heating tub in the case that a sterilization tub and the heating tub are provided. <P>SOLUTION: In the steam sterilization device, a steam supply pipe 3 provided with a steam supply shutoff valve 2 and a steam discharge pipe 5 provided with a steam discharge shutoff valve 4 are connected to the sterilization tub 1 and an object to be sterilized housed inside is sterilized by steam introduced from the steam supply pipe 3 into the sterilization tub 1 by opening the steam supply shutoff valve 2. A magnetically operated switch 6 to be opened when a temperature inside the sterilization tub 1 exceeds a Curie point is provided, the input of the magnetically operated switch 6 is directly connected to the electric circuit of the steam supply shutoff valve 2 and/or the electric circuit of the steam discharge shutoff valve 4, and when the temperature inside the sterilization tub 1 exceeds the Curie point, the steam supply shutoff valve 2 is closed and/or the steam discharge shutoff valve 4 is opened by the operation of the magnetically operated switch 6. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a steam sterilization apparatus that sterilizes an object to be sterilized by introducing steam into a sterilization tank.

  2. Description of the Related Art Conventionally, a steam sterilization apparatus that sterilizes an object to be sterilized such as a scalpel or forceps used for treatment in a hospital or the like with steam is known. Steam sterilization is sterilization using heat released when steam condenses, and a steam sterilization apparatus introduces steam into a sterilization tank containing an object to be sterilized, pressurizes it, The temperature is maintained for a certain period of time, and the object to be sterilized is sterilized.

  In addition, many steam sterilizers pre-heat the sterilization tank and the objects to be sterilized to a predetermined temperature before sterilization in order to increase the sterilization effect and prevent the sterilized objects from getting wet. Has been implemented. In such a steam sterilization apparatus, with regard to preheating of the sterilization tank and the object to be sterilized, it has a structure equipped with a heating tank that covers the periphery of the sterilization tank containing the object to be sterilized, and steam is introduced into the heating tank. Thus, the sterilization tank is heated from the outside, and the temperature inside the sterilization tank is raised to a predetermined temperature at the start of operation, and this temperature is maintained during the operation (see, for example, Patent Document 1).

  Such a steam sterilization apparatus introduces and pressurizes steam into a sterilization tank containing an object to be sterilized, sets the inside of the sterilization tank to a predetermined temperature, introduces and pressurizes steam into the heating tank, Since the inside of the sterilization tank is heated from the outside with a predetermined temperature inside, it is necessary to be careful of the pressure destruction of the sterilization tank and the heating tank at all times, and in order to use the steam sterilization device safely, Prevention of pressure breakdown is an important point.

The pressure breakdown of the sterilization tank or heating tank is due to abnormal increase in the pressure in the tank, and a temperature sensor is installed in the sterilization tank or heating tank as a means to prevent pressure destruction of the sterilization tank or heating tank. A valve that supplies steam to the sterilization tank or heating tank when it is determined that the temperature signal in the tank detected by the temperature sensor is input to the microcomputer and the pressure in the sterilization tank or heating tank is determined to be abnormal It is conceivable that the pressure in the sterilization tank or heating tank is prevented from being closed.
JP 2001-190642 A

  However, the means for preventing pressure destruction of the sterilization tank or heating tank is that the temperature sensor is not fail-safe, and the signal from the temperature sensor is judged by a microcomputer so that the sterilization tank or heating tank Since the valve for supplying steam into the tank is controlled, there is a problem that safety cannot be ensured when the microcomputer runs away or malfunctions.

  An object of the present invention is to provide a steam sterilization apparatus that can reliably prevent pressure destruction of a heating tank when a sterilization tank or a heating tank is provided.

The configuration of the present invention that achieves the above object will be described as follows.
In the invention according to claim 1, a steam supply pipe provided with a steam supply shut-off valve in a sterilization tank and an exhaust steam pipe provided with an exhaust steam shut-off valve are connected. In a steam sterilization apparatus for sterilizing an object to be sterilized by steam introduced into a sterilization tank, a magnetically operated switch is provided that opens when the temperature in the sterilization tank exceeds the Curie point, and the input of the magnetically operated switch Is directly connected to the electric circuit of the steam supply shutoff valve and / or the electrical circuit of the exhaust steam shutoff valve, and when the temperature in the sterilization tank exceeds the Curie point, the steam supply shutoff valve is closed by the operation of the magnetic operation switch. And / or a vapor shutoff valve is opened.

  With this configuration, if a magnetically operated switch having a Curie point at a predetermined temperature corresponding to the maximum allowable pressure in the sterilization tank is used, when the temperature in the sterilization tank exceeds the Curie point, the magnetic supply switch is operated by the operation of the magnetically operated switch. Since the steam shut-off valve is closed and the introduction of steam into the sterilization tank is stopped, and / or the vaporization shut-off valve is opened and the steam in the sterilization tank is discharged, the pressure rise in the sterilization tank can be stopped. This can prevent pressure destruction of the sterilization tank. Then, the magnetic force actuating switch is operated as a fail-safe switch because the magnetic force disappears at a predetermined temperature corresponding to the allowable maximum pressure of the sterilization tank and the magnetic force actuating switch is cut off. Since the input of the operation switch is directly connected to the electric circuit of the steam supply shutoff valve or the electrical circuit of the exhaust steam shutoff valve, there is no possibility of malfunction and the pressure destruction of the sterilization tank can be reliably prevented.

  According to the invention described in claim 2, a sterilization tank steaming tube comprising a sterilization tank for storing an object to be sterilized and a heating tank for covering and heating the sterilization tank, the sterilization tank having a sterilization tank fumigation shutoff valve. And a sterilization tank exhaust pipe with a sterilization tank exhaust shutoff valve are connected, and the heating tank exhaust pipe with a heating tank steaming shutoff valve and a heating tank exhaust steam shutoff valve are connected to the heating tank. A steam pipe is connected, the heating tank steaming shutoff valve is opened, the sterilization tank is heated by steam introduced from the heating tank steaming pipe into the heating tank, and the sterilization tank steaming shutoff valve is opened to sterilize. In the steam sterilization apparatus that sterilizes the objects to be sterilized stored in the sterilization tank by the steam introduced from the tank feed pipe into the sterilization tank, a magnetically operated switch is provided that opens when the temperature in the sterilization tank exceeds the Curie point. The sterilization tank supply shutoff valve electrical circuit and / or the sterilization tank exhaustion cutoff. When the temperature in the sterilization tank exceeds the Curie point, the sterilization tank fumigation shut-off valve is closed and / or the sterilization tank fumigation shut-off valve is opened by the operation of the magnetic operation switch. In addition, a magnetic operation switch that opens when the temperature in the heating tank exceeds the Curie point is provided, and an input circuit of the magnetic operation switch serves as an electric circuit of the heating tank steaming shutoff valve and / or an electric circuit of the heating tank exhaust steam shutoff valve. When the temperature in the heating tank exceeds the Curie point, the heating tank steaming shut-off valve is closed and / or the heating tank exhaust steam shut-off valve is opened by operating the magnetic operation switch. And

  From this configuration, if a magnetically operated switch having a Curie point at a predetermined temperature corresponding to the maximum allowable pressure of the sterilization tank and the heating tank is used, the operation of the magnetically operated switch is performed when the temperature in the sterilization tank exceeds the Curie point. As a result, the sterilization tank supply shutoff valve is closed and the introduction of steam into the sterilization tank is stopped, and / or the sterilization tank exhaustion shutoff valve is opened and the steam in the sterilization tank is discharged. In addition, when the temperature in the heating tank exceeds the Curie point, the heating tank steaming shut-off valve is closed by the operation of the magnetic force operation switch, and the steam is supplied to the heating tank. Since the introduction is stopped and / or the steam in the heating tank is exhausted by opening the heating tank exhaustion shutoff valve, the pressure rise in the heating tank can be stopped, and thereby the pressure in the sterilization tank and the heating tank Destruction can be prevented. And the operation of the magnetic operation switch is a fail-safe switch because the magnetic operation disappears at a predetermined temperature corresponding to the allowable maximum pressure of the sterilization tank and the heating tank, and the magnetic operation switch is turned off, so that no electricity flows. Since the input of the magnetic operation switch is directly connected to the electrical circuit of the steam supply shutoff valve and the electrical circuit of the exhaust steam shutoff valve, there is no risk of malfunction and the pressure destruction prevention of the sterilization tank and heating tank is ensured. It can be carried out.

  As described above, according to the steam sterilization apparatus of the present invention, a sterilization tank or a sterilization tank and a heating tank are provided with a magnetic operation switch that opens when the temperature exceeds the Curie point, and the input of the magnetic operation switch is cut off from the supply of steam. When the temperature in the sterilization tank or the sterilization tank and the heating tank exceeds the Curie point, the steam supply shut-off valve is activated by the operation of the magnetically operated switch when directly connected to the electric circuit of the valve and / or the electric circuit of the fumigation cutoff valve. Since the shut-off and / or the fumigation shut-off valve are opened, the sterilization tank or sterilization tank can be used by using a magnetically actuated switch with a predetermined temperature corresponding to the maximum allowable pressure of the sterilization tank or sterilization tank and heating tank. And when the temperature in the heating tank exceeds the Curie point, the steam supply shut-off valve is closed by the operation of the magnetic operation switch, and the introduction of steam into the sterilization tank or the sterilization tank and the heating tank is stopped, and / or Exhaust block Opens and the steam in the sterilization tank or sterilization tank and heating tank is discharged, so that the pressure increase in the sterilization tank or sterilization tank and heating tank can be stopped. Pressure breakdown can be prevented. Then, the operation of the magnetic force operation switch is such that the magnetic force disappears at a predetermined temperature corresponding to the maximum allowable pressure of the sterilization tank or the sterilization tank and the heating tank, and the magnetic operation switch is turned off. Since it becomes a safe switch and the input of the magnetic operation switch is directly connected to the electric circuit of the steam supply shutoff valve and / or the electrical circuit of the exhaust steam shutoff valve, there is no risk of malfunction, and the sterilization tank or sterilization tank and heating tank Can be reliably prevented.

  Hereinafter, an example of the best mode for carrying out the steam sterilization apparatus according to the present invention will be described in detail.

  1 and 2 show a first example of an embodiment of a steam sterilization apparatus according to the present invention, FIG. 1 is a schematic configuration diagram showing the steam sterilization apparatus of this example, and FIG. 2 is a magnetically operated switch used in this example. It is a longitudinal cross-sectional view which shows an example.

  In the steam sterilization apparatus of this example, a steam supply pipe 3 provided with a steam supply shutoff valve 2 and a steam exhaust pipe 5 provided with a steaming shutoff valve 4 are connected to the sterilization tank 1. Then, by opening the steam supply shut-off valve 2, steam generated by a boiler (not shown) is introduced from the steam supply pipe 3 into the sterilization tank 1, and the steam supply shut-off valve 2 is closed. In this way, the introduction of steam into the sterilization tank 1 is shut off, and the steam introduced into the sterilization tank 1 is discharged from the exhaust pipe 5 by opening the exhaust steam shutoff valve 4. It has become.

  In the sterilization tank 1, a magnetic force actuating switch 6 that opens when the temperature in the sterilization tank 1 exceeds the Curie point is provided. FIG. 2 is a longitudinal sectional view showing an example of the magnetic force actuated switch 6 used in this example. The magnetic force actuating switch 6 includes a reed switch 8 sealed in a glass tube 7, a cylindrical temperature-sensitive magnetic body 9 that is arranged around the reed switch 8 and changes its magnetism at the Curie temperature, and is also disposed around the reed switch 8. The cylindrical permanent magnet 10 is made up of.

  In the magnetic force actuated switch 6 configured in this way, the Curie point of the temperature-sensitive magnetic body 9 is set to a predetermined temperature corresponding to the maximum pressure allowed in the sterilization tank 1, and the temperature in the sterilization tank 1 is set as described above. When the temperature is higher than the temperature, the temperature becomes higher than the Curie point of the temperature-sensitive magnetic body 9, the magnetic force disappears, and the reed switch 8 is turned off accordingly. Lead wires 11 and 12 are connected to the reed switch 8. The glass tube 7 and the lead wires 11 and 12 are covered with a heat resistant insulating material 13.

  The magnetic force actuating switch 6 is directly connected to the control circuit 14 provided in the electric circuit of the steam supply shutoff valve 2 and the electrical circuit of the exhaust steam shutoff valve 4, and the temperature in the sterilization tank 1 has exceeded the Curie point. At this time, the magnetic force of the temperature-sensitive magnetic body 9 disappears, the magnetic operation switch 6 is activated and turned OFF, and the steam supply shut-off valve 2 is closed or the exhaust steam shut-off valve 4 is opened by the control circuit 14, or the steam supply When the shutoff valve 2 is closed, the exhaust steam shutoff valve 4 is opened.

  Further, the sterilization tank 1 is provided with a temperature sensor 15 capable of detecting a saturation temperature near atmospheric pressure, and a signal from the temperature sensor 15 is given to the control circuit 14 so that the door ( The control circuit 14 confirms the zero pressure when opening the door (not shown), and issues a permission instruction when opening the door.

  In the steam sterilization apparatus configured as described above, when the temperature in the sterilization tank 1 exceeds the Curie point, the magnetic force operation switch 6 is activated, and the control circuit 14 receives a signal from the magnetic force operation switch 6 to control it. The steam supply shutoff valve 2 is closed and / or the exhaust steam shutoff valve 4 is opened. When the steam supply shut-off valve 2 is closed, the introduction of steam into the sterilization tank 1 is stopped, and when the exhaust steam shut-off valve 4 is opened, the steam in the sterilization tank 1 is discharged. The ascent can be stopped, and thereby the pressure destruction of the sterilization tank 1 can be prevented.

  The operations of the steam supply cutoff valve 2 and the exhaust steam cutoff valve 4 are controlled by the control circuit 14. Of these operations, which operation is selected is not particularly limited, but when the temperature in the sterilization tank 1 exceeds the Curie point, the steam supply shutoff valve 2 is closed and the steaming shutoff valve 4 is opened. When it is operated in a safe manner, the safety becomes even higher.

  The operation of the magnetic force operation switch 6 is a fail-safe switch because the magnetic force disappears at a predetermined temperature corresponding to the allowable maximum pressure of the sterilization tank 1 and the magnetic force operation switch is turned off, so that electricity does not flow. Since the input of the magnetic force actuating switch 6 is directly connected to the control circuit 14 provided in the electric circuit of the steam supply shutoff valve 2 and the electrical circuit of the exhaust steam shutoff valve 4, there is no risk of malfunction and the sterilization tank 1 Pressure destruction can be reliably prevented.

  In this example, the magnetic force actuated switch 6 is provided in the sterilization tank 1, but is not limited to this, and the steam supply shutoff valve 2 in the steam supply pipe 3 connected to the sterilization tank 1 is not limited thereto. It may be provided on the downstream side, or may be provided on the upstream side of the exhaust steam cutoff valve 4 in the exhaust steam pipe 5.

  FIG. 3 is a schematic configuration diagram of a second example of the embodiment of the steam sterilization apparatus according to the present invention.

  The steam sterilization apparatus of this example includes a sterilization tank 16 for storing an object to be sterilized and a heating tank 17 for covering and heating the sterilization tank 16. The sterilization tank 16 is connected to a sterilization tank steaming pipe 19 having a sterilization tank steaming shutoff valve 18 and a sterilization tank steaming pipe 21 having a sterilization tank steaming shutoff valve 20.

  The heating tank 17 is connected to a heating tank steaming pipe 23 having a heating tank steaming cutoff valve 22 and a heating tank steaming pipe 25 having a heating tank steaming cutoff valve 24.

  Then, the steam generated by a boiler (not shown) is introduced into the sterilization tank 16 from the sterilization tank steaming pipe 19 by opening the sterilization tank steaming cutoff valve 18, and the sterilization tank steaming cutoff valve is introduced. By closing 18, the introduction of steam into the sterilization tank 16 is blocked, and by opening the sterilization tank exhaust steam shutoff valve 20, the steam introduced into the sterilization tank 16 is removed. It discharges from the sterilization tank exhaust pipe 21.

  Further, by opening the heating tank supply shutoff valve 22, steam generated by a boiler (not shown) is introduced from the heating tank supply pipe 23 into the heating tank 17, and the heating tank supply cutoff valve is introduced. The steam introduced into the heating tank 17 is cut off by closing the heating tank 17, and the steam introduced into the heating tank 17 is opened by opening the heating tank exhausting shutoff valve 24. It discharges from the heating tank exhaust pipe 25.

  In the sterilization tank 16 and the heating tank 17, there are provided magnetic operation switches 26 and 27 that open when the temperature in the sterilization tank 16 and the heating tank 17 exceeds the Curie point. The magnetic force operation switches 26 and 27 used in this example have the same configuration as the magnetic force operation switch 6 used in the first example. The magnetic actuation switch 26 is set to a predetermined temperature at which the Curie point of the temperature sensitive magnetic body 9 corresponds to the maximum pressure allowed in the sterilization tank 16, and the magnetic actuation switch 27 is configured to correspond to the temperature sensitive magnetic body 9. The Curie point is set to a predetermined temperature corresponding to the maximum pressure allowed in the heating tank 17.

  The magnetic force actuating switch 26 provided in the sterilization tank 16 is directly connected to the control circuit 28 provided in the electric circuit of the sterilization tank fumigation cutoff valve 18 and / or the electric circuit of the sterilization tank fumigation cutoff valve 20. When the temperature in the sterilization tank 16 exceeds the Curie point, the magnetic force of the temperature-sensitive magnetic body 9 disappears, the magnetic force operation switch 26 is turned off, and the control circuit 28 controls the sterilization tank fumigation shutoff valve. 18 is closed or the sterilization tank exhaustion shutoff valve 20 is opened, or the sterilization tank steaming shutoff valve 18 is closed and the sterilization tank exhaustion shutoff valve 20 is opened.

  The magnetic force actuating switch 27 provided in the heating tank 17 is directly connected to the control circuit 28 provided in the electric circuit of the heating tank steaming shutoff valve 22 and / or the electrical circuit of the heating tank exhausting shutoff valve 24. When the temperature in the heating tank 17 exceeds the Curie point, the magnetic force of the temperature-sensitive magnetic body 9 disappears, the magnetic operation switch 27 is activated and turned off, and the heating circuit is heated by the control circuit 28. The shut-off valve 22 is closed or the heating tank exhaust steam shut-off valve 24 is opened, or the heating tank feed steam shut-off valve 22 is closed and the sterilization tank exhaust steam shut-off valve 20 is opened.

  Further, as in the first example, the sterilization tank 16 is provided with a temperature sensor 29 that can detect a saturation temperature near atmospheric pressure, and a signal from the temperature sensor 29 is given to the control circuit 28. The control circuit 28 confirms the zero pressure when the door (not shown) of the sterilization tank 16 is opened, and issues a permission instruction when the door is opened.

  In the steam sterilization apparatus configured as described above, when the temperature in the sterilization tank 16 exceeds the Curie point, the magnetic force actuating switch 26 is actuated and controlled by the control circuit 28 that receives a signal from the magnetic force actuating switch 26. The sterilization tank feed shutoff valve 18 is closed and / or the sterilization tank exhaust steam shutoff valve 20 is opened. Since the introduction of steam into the sterilization tank 16 is stopped by closing the sterilization tank steaming shut-off valve 18 and the sterilization tank exhaust steam shut-off valve 20 is opened, the steam in the sterilization tank 16 is discharged. The pressure rise in 16 can be stopped, and thereby the pressure destruction of the sterilization tank 16 can be prevented.

  The operations of the sterilization tank supply cutoff valve 18 and the sterilization tank exhaustion cutoff valve 20 are controlled by the control circuit 28. Of these operations, which operation is selected is not particularly limited, but when the temperature in the sterilization tank 16 exceeds the Curie point, the sterilization tank fumigation shutoff valve 18 is closed and the sterilization tank fumigation shutoff valve is closed. If it is operated so that 20 opens, it will become much safer.

  Further, when the temperature in the heating tank 17 exceeds the Curie point, the magnetic operation switch 27 is activated, and the control of the control circuit 28 that receives a signal from the magnetic operation switch 27 controls the heating tank supply shutoff valve 22. Is closed and / or the heating tank exhaust steam shutoff valve 24 is opened. Since the introduction of the steam into the heating tank 17 is stopped by closing the heating tank supply shutoff valve 22, and the steam in the heating tank 17 is discharged by opening the heating tank exhausting shutoff valve 22, the heating tank The pressure rise in 17 can be stopped, whereby the pressure breakage of the heating tank 17 can be prevented.

  The operation of the heating tank steaming shutoff valve 22 and the heating tank exhaust steam shutoff valve 24 is controlled by the control circuit 28. Of these operations, which operation is selected is not particularly limited, but when the temperature in the heating tank 17 exceeds the Curie point, the heating tank steaming cutoff valve 22 is closed and the heating tank exhausting cutoff valve is closed. If it is operated so that 24 opens, it will become much safer.

  In this example, the magnetic force actuating switch 26 is provided in the sterilization tank 16, but is not limited thereto, and the sterilization tank supply pipe 19 connected to the sterilization tank 16 is supplied with a sterilization tank. It may be provided on the downstream side of the steam shutoff valve 18 or may be provided on the upstream side of the sterilization tank exhaust steam shutoff valve 20 in the sterilization tank exhaust pipe 21.

  Moreover, although the magnetic force operation switch 27 is provided in the heating tank 17, it is not restricted to this, The heating tank steaming cutoff valve 22 in the heating tank steaming pipe 23 connected to the heating tank 17 is not limited to this. It may be provided on the downstream side, or may be provided on the upstream side of the heating tank exhaust steam shutoff valve 24 in the heating tank exhaust pipe 25.

The schematic block diagram which shows the 1st example of embodiment of the steam sterilizer which concerns on this invention. The longitudinal cross-sectional view which shows an example of the magnetic force operation switch used by this invention. The schematic block diagram which shows the 2nd example of embodiment of the steam sterilizer which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sterilization tank 2 Steam supply shut-off valve 3 Steam supply pipe 4 Steaming shut-off valve 5 Steam exhaust pipe 6 Magnetic operation switch 7 Glass tube 8 Reed switch 9 Temperature-sensitive magnetic body 10 Permanent magnet 11 Lead wire 12 Lead wire 13 Heat-resistant insulating material 14 control circuit 15 temperature sensor 16 sterilization tank 17 heating tank 18 sterilization tank steaming shutoff valve 19 sterilization tank steaming pipe 20 sterilization tank steaming shutoff valve 21 sterilization tank steaming pipe 22 heating tank steaming shutoff valve 23 heating tank steaming Pipe 24 Heating tank exhaust steam shutoff valve 25 Heating tank exhaust steam pipe 26 Magnetic operation switch 27 Magnetic operation switch 28 Control circuit 29 Temperature sensor

Claims (2)

A steam supply pipe provided with a steam supply shutoff valve is connected to a sterilization tank and an exhaust steam pipe provided with a steaming shutoff valve. The steam supply shutoff valve is opened and steam introduced from the steam supply pipe into the sterilization tank is used. In the steam sterilizer that sterilizes the objects to be sterilized inside,
A magnetically operated switch that opens when the temperature in the sterilizing tank exceeds the Curie point is provided, and the input of the magnetically operated switch is directly connected to the electric circuit of the steaming shutoff valve and / or the electrical circuit of the exhaust steam shutoff valve, A steam sterilizer characterized in that when the temperature in the interior exceeds the Curie point, the steam supply shut-off valve is closed and / or the exhaust steam shut-off valve is opened by the operation of the magnetic operation switch. A sterilization tank containing a sterilization tank and a heating tank for covering and heating the sterilization tank, and a sterilization tank provided with a sterilization tank fumigation shutoff valve and a sterilization tank fumigation shutoff valve A tank exhaust pipe is connected, a heating tank steam pipe having a heating tank steaming shutoff valve and a heating tank exhaust pipe having a heating tank steam shutoff valve are connected to the heating tank, and the heating tank steaming pipe is connected. The shut-off valve is opened and the sterilization tank is heated by the steam introduced from the heating tank steam pipe into the heating tank, and the sterilization tank feed shut-off valve is opened and introduced from the sterilization tank steam pipe into the sterilization tank. In a steam sterilization apparatus that sterilizes the object to be sterilized stored in the sterilization tank by using steam,
A magnetic operation switch that opens when the temperature in the sterilization tank exceeds the Curie point is provided, and the input of the magnetic operation switch is directly connected to the electric circuit of the sterilization tank fumigation shut-off valve and / or the electric circuit of the sterilization tank exhaustion cut-off valve When the temperature in the sterilization tank exceeds the Curie point, the sterilization tank steaming shut-off valve is closed and / or the sterilization tank exhaust steam shut-off valve is opened by the operation of the magnetic operation switch.
In addition, a magnetic operation switch that opens when the temperature in the heating tank exceeds the Curie point is provided, and an input circuit of the magnetic operation switch serves as an electric circuit of the heating tank steaming shutoff valve and / or an electric circuit of the heating tank exhaust steam shutoff valve. When the temperature in the heating tank exceeds the Curie point, the heating tank steaming shut-off valve is closed and / or the heating tank exhaust steam shut-off valve is opened by operating the magnetic operation switch. Steam sterilizer.

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