JP4698543B2 - High pressure steam sterilizer - Google Patents

Description

The present invention relates to a high-pressure steam sterilizer that is mainly installed in a hospital or the like and sterilizes an object to be sterilized such as a medical instrument under high-pressure steam.

A chamber having an upper surface opening provided in the sterilizer body, a lid housing supported to be freely opened and closed on the upper part of the sterilizer body, and a lid for sealing the upper surface opening of the chamber, and housed in the chamber In a high-pressure steam sterilizer that sterilizes an object under high-pressure steam, there is a high-pressure steam sterilizer in which a foot pedal is provided at the front bottom of the sterilizer body, and a lid is opened by operating this pedal. (See Patent Document 1).
JP 2005-6927 A

In the configuration of Patent Document 1, since the lid can be opened by stepping on the pedal with a foot, the operability in the state where the hand is blocked is improved, but the sterilization process is performed in a state where the lid is securely closed. No technology has been disclosed for safe driving that allows the lid to be opened in a safe state after the sterilization process is completed.

In view of this point, the present invention provides a high-pressure steam sterilizer considering safety so that the lid can be opened in a safe state in which the lid is securely closed and the sterilization process is completed. It is.

The high-pressure steam sterilizer of the present invention seals the upper surface opening of the chamber in a chamber having an upper surface opening provided in the sterilizer body and a lid housing supported by a hinge portion that can be opened and closed on the upper rear side of the sterilizer body. A high-pressure steam sterilizer for sterilizing an object to be sterilized stored in the chamber under high-pressure steam, a lock means for locking the lid in a sealed state on the upper front side of the sterilizer body, and the lid An operation handle for unlocking the lock means at the front of the housing, a solenoid-type lock device for locking the operation handle so as to prevent the unlocking operation, and the lid housing with respect to the sterilizer body. In front of the lid housing, a plurality of lid detection switches for detecting that the lid has been properly closed (the lid seals the top opening of the chamber). The solenoid-type locking device includes a solenoid attached to the lid housing, a plunger actuated by the solenoid so as to prevent the unlocking operation by the operation handle, and an operation handle lock actuated by the plunger. A detection switch is provided, and the operation is not started when all of the lid detection switches and the operation handle lock detection switch have not detected a normal state at the start of the operation of the high-pressure steam sterilizer.

In addition to the effects of the first invention, the present invention provides a plurality of lid detection switches on the front portion of the lid housing opposite to the hinge portion, so that the lid housing is closed in a biased manner. If this is not done, one of the lid detection switches does not detect the normal closed state, and the operation is not started, so that safety at the start of operation is further improved. Even when one of the switches breaks down and enters the closed lid detection state, the other lid detection switch does not detect the normal closed state, and the operation is not started. This will further improve safety. Then, the closed state is detected by the plurality of closed detection switches, and the start state of the safe driving is checked by double detection that detects the locked state of the operation handle by the operation handle lock detection switch. It will be possible to drive.

The high-pressure steam sterilizer of the present invention includes a chamber having an upper surface opening provided in the sterilizer body, and a lid for sealing the upper surface opening of the chamber to a lid housing supported by a hinge portion on the upper part of the sterilizer body. A high-pressure steam sterilizer for sterilizing an object to be sterilized stored in the chamber under high-pressure steam, a lock means for locking the lid in a sealed state, and an operation handle for unlocking the lock means; The solenoid-type locking device that prevents the unlocking operation by the operation handle, and the lid housing in a properly closed state with respect to the sterilizer body (the lid seals the upper surface opening of the chamber) The solenoid-type locking device includes a solenoid attached to the lid housing and the operation handle. A plunger that is actuated by the solenoid so as to prevent the unlocking operation by the actuator and an operation handle lock detection switch that is actuated by the plunger, and the lid detection switch and the operation at the start of operation of the high-pressure steam sterilizer When the handle lock detection switch is not detected, the operation is not started, and an embodiment of the present invention will be described below.

An embodiment of the present invention will be described. FIG. 1 is a front perspective view of a high-pressure steam sterilizer according to the present invention, FIG. 2 is a front perspective view of the high-pressure steam sterilizer according to the present invention with the lid opened, and FIG. 3 is a view of the high-pressure steam sterilizer according to the present invention. FIG. 4 is a piping diagram of the high-pressure steam sterilizer according to the present invention, FIG. 5 is a process operation diagram of the high-pressure steam sterilizer according to the present invention, and FIG. 6 is a side view showing in cross section the locking means for the lid of the high-pressure steam sterilizer according to the present invention, and FIG. 7 is a locking device for the lid of the high-pressure steam sterilizer, the lid detecting switch part, and the locking device for the operation handle according to the present invention. FIG. 8 is a front perspective view showing the lid detecting switch portion of the high-pressure steam sterilizer according to the present invention and a lock device portion of the operation handle, and FIG. 9 is a high-pressure steam sterilizer according to the present invention. Shows the operation handle part, lid locking means and lid detection switch part FIG. 10 is a front perspective view showing an operation handle portion, a lid locking means, an operation handle lock device, and a lid detection switch portion of the high-pressure steam sterilizer according to the present invention, and FIG. 11 is a high-pressure steam according to the present invention. The top view which shows the operation part of a sterilizer, FIG. 12 is a block diagram which shows the control part of the high pressure steam sterilizer based on this invention.

1 to 3, reference numeral 1 denotes a high-pressure steam sterilizer according to the present invention. The high-pressure steam sterilizer 1 includes a sterilizer main body 2 and a lid housing 3 supported at the upper part of the sterilizer main body 2 by a hinge part 18 so that the rear part can be freely opened and closed. The sterilizer main body 2 has an upper surface opening 4A. Bottomed cylindrical chamber 4
The lid housing 3 is provided with a lid 5 for sealing the upper surface opening 4A of the chamber 4. In the state where the object to be sterilized is stored in the chamber 4, the lid housing 3 is closed and the lid 5 seals the upper surface opening 4 </ b> A of the chamber 4, the high-pressure steam sterilizer 1 is operated, and the chamber 4
The inside is brought into a high-temperature and high-pressure state to sterilize the article to be sterilized. In order to make the upper surface opening 4 </ b> A of the chamber 4 in a good sealed state by the lid 5, an annular body 5 </ b> A is attached to the periphery of the lower end opening of the lid 5, and the annular body 5 </ b> A covers the upper end portion of the upper surface opening 4 </ b> A of the chamber 4. It becomes a state.

Since the inside of the chamber 4 is in a high temperature and high pressure state, it is important to ensure a sealed state with the lid 5.
For this reason, a lock means LK for holding the lid 5 in a locked state in which the upper surface opening 4A of the chamber 4 is sealed is provided in the front part of the sterilizer main body 2, and the lid 5 seals the upper surface opening 4A of the chamber 4. In order to detect this, a lid detection switch 7 is provided in the lid housing 3.

As shown in FIGS. 6 and 7, the lock unit LK includes a lock arm 10 that rotates with respect to the lid 5 in a locked state and an unlocked state. The locking means LK is arranged at least on the upper side of the sterilizer main body 2 so as to be separated from each other so that the lid 5 is in a locked state in which the upper surface opening 4A of the chamber 4 is securely sealed. For this reason, the lock means LK is disposed at least on the left and right sides of the upper part of the sterilizer main body 2, and a plurality of lock arms 10 are provided at left and right intervals. In the embodiment, the lock means LK is opposite to the hinge portion 18. Lock arms 10 </ b> A and 10 </ b> B are provided at the left and right locations of the upper part of the sterilizer main body 2 at the front side portion which is the side position. Each of the lock arms 10A and 10B is supported by a support portion 9 extending in parallel from the side surface of the chamber 4 so as to be rotatable by a shaft portion 8, and protrudes upward through the hole 2A1 of the upper wall 2A. Claw portions 10A1 and 10B1 that are respectively engaged with the engaging portions 11 and 11 provided on the peripheral edge portion of the lid 5 are formed on the upper portions of the lock arms 10A and 10B. Each lock arm 10A, 10B has a claw portion 10A1 by coil springs 19, 19 wound around the shaft portion 8 with one end locked to the support portion 9 and the other end locked to the lock arms 10A, 10B. 10B1 are the locking portions 11 respectively.
, 11 is biased toward the locked state. The hole 2A1 is closed by a bellows-shaped elastic material 54 in the radial direction. In addition, the support part 9 can also be provided in the state hung from the upper wall 2A of the sterilizer body 2.

As shown in FIGS. 8 to 10, the lid housing 3 has an operation handle 12 for moving forward by rotating the lock arms 10 </ b> A and 10 </ b> B from the locked state to the unlocked state by gripping the front side with a hand. I have. The operation handle 12 is provided on the front surface portion of the lid housing 3 opposite to the hinge portion 18, and the operation handle 12 is operated inside the fixed grip handle portion 3 </ b> A protruding from the front surface side of the lid housing 3. The operation handle 12 is urged rearward by a coil spring 13 disposed between the handle 12 and the base material 3A1 in the grip handle portion 3A, and is combined with the fixed grip handle portion 3A. The operation handle 12 includes a plate action portion 17 connected to left and right sides extending rearward. The action portion 17 is loosely fitted with left and right guide pins 16 erected on a fixed portion in the lid housing 3. A long hole 15 in the front-rear direction is formed in the left-right position, and is provided to slide back and forth in the lid housing 3. The action portion 17 in the lid housing 3 is supported by a support base provided horizontally in the left and right sides 3A11 of the base 3A1 in the grip handle portion 3A or in the lid housing 3 so as to slide back and forth in the lid housing 3. It is placed on the material 14. In the embodiment, the action portion 17 is placed on the left and right sides 3A11 of the base 3A1 in the grip handle portion 3A, and the left and right guide pins 16 are erected on the left and right sides 3A11 of the base 3A1. In addition, on the left and right parts of the action part 17, the action arms corresponding to the rear side of the locking parts 10A3 and 10B3 formed on the upper ends of the left and right lock arms 10A and 10B so that the left and right lock arms 10 are rotated. 17A and 17B are provided.

Each of the lock arms 10A and 10B is connected to the claw portions 10A1 and 10B1 by a coil spring 19.
Is biased in the direction of the locked state in which the engaging portions 11 and 11 are engaged. For this reason, when the lid housing 3 is operated with respect to the sterilizer body 2 from the opened state to the properly closed state (the lid 5 closes the upper surface opening 4A of the chamber 4), the locking portions 11 and 11 of the lid 5 are operated. Are inclined surfaces 10A4 that are inclined inwardly on the upper surfaces of the claw portions 10A1 and 10B1 of the lock arms 10A and 10B,
10B4 is brought into contact with the lid housing 3 and the engaging portions 11 and 11 push the inclined surfaces 10A4 and 10B4, so that the claws of the lock arms 10A and 10B are resisted against the acting force of the coil spring 19. Lock arm 10 so that portions 10A1 and 10B1 escape outward
A and 10B rotate. By this action, the locking portions 11 and 11 are moved to the claw portions 10A1 and 10B1.
After passing, the lock arms 10A and 10B are restored by the acting force of the coil spring 19, and the claw portions 10A1 and 10B1 are locked on the locking portions 11 and 11, and the lid 5 is opened on the upper surface of the chamber 4. 4A is sealed. An escape recess 3B into which the upper portions of the lock arms 10A and 10B enter is formed on the rear wall surface of the lid housing 3 so that the upper portions of the lock arms 10A and 10B do not collide with the upper portions of the lock arms 10A and 10B when the lid housing 3 is closed.

As described above, when the lid 5 is closed so that the upper surface opening 4A of the chamber 4 is sealed, the lock arms 10A and 10B are engaged with the locking portions 11 and 11 of the lid 5 by the coil spring 19 and the claw portions 10A1 and 10B1. The locked state is stopped. Since the operation handle 12 is normally biased rearward by the coil spring 13, the operating arm 17A is in the locked state in which the claw portions 10A1 and 10B1 are locked to the locking portions 11 and 11 of the lid 5. , 17B is a state close to the rear side of the locking portions 10A3, 10B3 formed at the upper ends of the lock arms 10A, 10B.

In this state, the operation handle 12 moves forward so as to approach the grip handle portion 3A by gripping the operation handle 12 together with the grip handle portion 3A against the spring force of the coil spring 13. Along with this movement, the action portion 17 is moved from the left and right guide pins 16 to the longitudinal slot 1 in the front-rear direction.
5 and moved forward, the action arms 17A and 17B provided on the left and right sides of the action part 17 pull the locking parts 10A3 and 10B3 forward, respectively. For this reason, the lock arms 10A, 10B
Is rotated forward against the spring force of the coil spring 19, and the claw portions 10 </ b> A <b> 1 and 10 </ b> B <b> 1 are disengaged from the engaging portions 11 and 11 of the lid 5 and become unlocked. In this state, by pushing or pulling up the operation handle 12 together with the grip handle portion 3A as it is, the lid housing 3 is opened upward with the hinge portion 18 as a center.
A can be opened and the object to be sterilized in the chamber 4 can be taken out.

When the lid housing 3 is not properly closed, such as when the lid housing 3 is biasedly closed, the lid 5
However, when the operation of the high-pressure steam sterilizer 1 is started in this insufficient state, the high-pressure steam in the chamber 4 leaks and is dangerous. In order to prevent this, as shown in FIGS. 7 to 10, the lid housing 3 is properly closed with respect to the sterilizer main body 2 (the lid 5 has an upper surface opening 4 </ b> A of the chamber 4. The closed lid detection switch 7 is provided for detecting that it has been in a state of sealing. In order to accurately detect the closed state, the lid detection switch 7 is provided in the lid housing 3 in a left-right arrangement at a front portion that is located on the opposite side of the hinge portion 18. In the example,
A substantially U-shaped holding member 2 mounted on a support base 14 provided in a horizontal direction in the lid housing 3.
Closed lid detection switches 7A and 7B are provided at two locations on the left and right sides of the upper surface of 0.

In order to activate the lid detection switches 7A, 7B by closing the lid housing 3,
Actuating rods 21A and 21B are provided. Specifically, each lid detection switch 7A
, 7B actuating rods 21A, 21B that actuate the respective actuating bodies 7A1, 7B1 are arranged vertically penetrating the upper and lower sides 20A, 20B of the holding member 20 so as to move up and down.
A and 21B are urged in a direction extending downward of the holding member 20 by coil springs 22A and 22B, respectively. Each actuating rod 21A, 21B has a respective stopper 23A, 2B
At the position where 3B contacts the lower side 20B of the holding member 20, the length extending downward of the holding member 20 is limited, and the length extending downward of the lid housing 3 is limited.

When the lid housing 3 is properly closed (the lid 5 seals the upper surface opening 4A of the chamber 4), the lower ends of the actuating rods 21A and 21B protrude downward from the lid housing 3, and the upper wall of the sterilizer body 2 2A is pushed up against the bias of the coil springs 22A and 22B. For this reason, each of the operating bodies 7A1 and 7B1 of the lid detection switches 7A and 7B is pushed (FIGS. 7, 8, and 10 are depicted in a plurality of stages to show the operating state), and the lid detection is performed. The switches 7A and 7B are turned ON or OFF to detect the closed state, and the closed cover detection switch 7A,
It is recognized that the sub-control unit SC on the lid housing 3 side to which 7B is connected is in the closed state. When one of the lid detection switches 7A and 7B does not detect the normal closed state, the main control unit MC on the sterilizer body 2 side is based on the detection by the sub-control unit SC. Control so as not to start the operation.

As described above, the operation handle 1 together with the grip handle portion 3A against the spring force of the coil spring 13 is used.
Since the lid 5 is unlocked by grasping 2 with a hand, if this operation is performed during the operation of the high-pressure steam sterilizer 1, the high-pressure steam in the chamber 4 leaks and is dangerous. For this reason, during the operation of the high-pressure steam sterilizer 1, in order to prevent the operation handle 12 from releasing the locked state by the lock means LK, the operation handle 12 is prevented from moving forward. A solenoid-type locking device 24 that prevents the operation of the motor 12 is provided in the lid housing 3. Specifically, the solenoid-type locking device 24 includes a solenoid 25 mounted on the support base 14, a plunger 26 that protrudes for a long time when the solenoid 25 is energized, and an operation handle lock detection that is operated by the plunger 26. A switch 28 is provided. In order to stabilize the operation of the plunger 26 in the horizontal direction and to keep the handle locked in a stable state, the plunger 26 is always in a state of passing through the hole 14B of the support side 14A rising from the support base material 14 and protrudes by turning on or off the solenoid 25. The plunger 26 passes through the hole 27A of the hanging side 27 formed in a part of the action portion 17 that is integral with the operation handle 12. For this reason, even if the gripping operation of the operation handle 12 is performed, the operation handle 12 and the action portion 17 cannot be pulled forward, and the claw portions 10A1 and 10B1 of the lock arms 10A and 10B are connected to the locking portion 11 of the lid 5, 11
It is the structure which cannot remove the locked state currently latched in.

An operation handle lock detection switch 28 is provided on the support base 14 in order to detect a handle lock state in which the operation handle 12 is locked by the solenoid type locking device 24. Specifically, the operation handle lock detection switch 28 is attached to an attachment portion extending from the holding member 20, and the actuating body 28A of the switch 28 is pressed and operated by the plunger 26 that protrudes long when the solenoid 25 is turned ON or OFF ( In FIG. 8, the switch 28 is turned ON or OFF by drawing it in a plurality of stages so as to show the operating state. Thereby, it is detected that the operation handle 12 is locked by the solenoid type locking device 24,
The sub controller SC recognizes whether the switch 28 is ON or OFF, and the main controller MC on the sterilizer body 2 side.
Receives the data (information or signal). The main control unit MC operates the sub control unit SC to turn on or off the solenoid 25 and retract the plunger 26 in a safe state in which the temperature and pressure in the chamber 4 have decreased due to the end of the predetermined operation mode. As a result, the locked state of the operation handle 12 is released, and the lid housing 3 can be opened (the lid 5 opens the upper surface opening 4 </ b> A of the chamber 4) by grasping the operation handle 12.

As one method, the solenoid 25 opens the lid housing 3 by retracting the plunger 26 by de-energizing (OFF) and grasping the operation handle 12 (the lid 5 opens the upper surface opening 4A of the chamber 4). In a non-locking state, the plunger 26 is protruded by energization (ON), and the operation handle 12 is locked in the locked state as described above, and the lid housing 3 cannot be opened (the lid 5 is the upper surface of the chamber 4). The state where the opening 4A is closed)
Can be controlled. In this case, turn on the power switch of the high-pressure steam sterilizer 1
In the state, if the temperature and pressure in the chamber 4 are in a safe state, the main controller MC
Based on the above, the solenoid 25 is deenergized (OFF) so that it is not locked, and the high-pressure steam sterilizer 1
During the operation, the solenoid 25 is energized (ON) to lock. Then, as described above, in a safe state in which the temperature and pressure in the chamber 4 are reduced by the sterilization operation and completion of the predetermined operation mode, the solenoid 25 is de-energized (OFF) based on the main control unit MC, The lid housing 3 can be opened (the lid 5 can open the upper surface opening 4A of the chamber 4). In addition, when the power is turned off due to a power failure during operation of the high-pressure steam sterilizer 1 or the power switch is turned off, the solenoid is not energized (OFF), so that the operation handle 12 is not restrained in the locked state. Absent.

As shown in FIGS. 1 and 11, the front portion of the lid housing 3 has a setting unit 31 for setting operation conditions and operation modes of the high-pressure steam sterilizer 1, and a display unit 32 for displaying operation conditions and operation modes. An operation unit 30 including a speaker SP and the like is provided. The display unit 32 is a temperature display unit 32.
A, a time display unit 32B, a course (operation mode) display unit 32C, and a process display unit 32
D is provided. The setting unit 31 includes a time setting unit 31A, a reservation setting unit 31B, and a course selection unit 3
1C, a setting confirmation unit 31D, a start unit 31E, a stop unit 31F, an up / down unit 31G for setting values of temperature and time, and the like. Each time the course selection unit 31C is turned ON, the lighting position of the LED 32C1 on the left side of each course in the course (operation mode) display unit 32C is switched to display the selected course, and the lighting position of each LED 32D1 of the process display unit 32D is switched. The process of the selected course is displayed. The setting unit 31 and the display unit 32 are connected to the sub-control unit SC to exchange data (information or signals), and the data (information or signals) with the sub-control unit SC under the control of the main control unit MC. By the exchange, the display unit 32 operates based on the operation of the setting unit 31.

The sterilizer body 2 is provided with casters 33 at the bottom four corners, an exhaust container 34 is detachably stored on the left side of the front surface, and a pressure gauge 35 with a needle type display is provided on the right side of the front surface. FIG. 4 is a piping system diagram. A water tank 37 and a heater 36 such as a sheathed heater disposed in the water in the water tank 37 are provided at the inner bottom of the chamber 4 as steam generating means. 38, a pressure release pipe 39 connected to the pressure gauge 35, a solenoid valve type exhaust valve 40 in the middle, an exhaust pipe 41 whose tip is opened to the water in the exhaust container 34, a vacuum breaker valve 42 and a digital pressure sensor 43. The connected outlet pipe 44 and the like are connected. Temperature sensors 45, respectively, near the inlets of the exhaust pipe 41 and the outlet pipe 44 and at the intermediate height position of the chamber 4, respectively.
46 and 47 are connected.

A drain electromagnetic valve 48 and a manual drain valve 49 are connected in series to the bottom surface of the chamber 4 in the middle.
A drain pipe 50 having an open end connected to the front surface of the sterilizer body 2 below the exhaust container 34 is connected. The manual drain valve 49 opens and closes by turning the handle 52.
The solenoid-type plunger 51 controlled by the main controller MC controls the handle 52 so that the handle 52 can be rotated.

As shown in FIGS. 4 and 12, the main control unit MC is a control means constituted by a microcomputer or the like, and exchanges signals with a sub-control unit SC constituted by a microcomputer or the like, or a digital type. Based on data (information or signals) from the pressure sensor 43 and the temperature sensors 45, 46, and 47, predetermined energization control for the heater 36, the exhaust valve 40, the drain electromagnetic valve 48, the solenoid plunger 51, and the like is set in advance. This is done according to a sequence. Data (information or signals) of the setting unit 31 and the lid detection switches 7A and 7B are input to the sub-control unit SC, and the display unit 32 and the like are controlled.

Next, one of the sterilization operations of the high-pressure steam sterilizer 1 will be described. FIG. 5 shows an operation process of the high-pressure steam sterilizer 1, and the operation will be described with reference to this. As described above, when the power switch is turned on, the operation handle 12 is brought into the unlocked state in which the plunger 26 is retracted by the solenoid 25, and the lock arm 10 is held by grasping the operation handle 12 as described above.
A and 10B rotate outward, and the lid housing 3 can be opened (the lid 5 can open the upper surface opening 4A of the chamber 4). The operation handle lock detection switch 28
Is in the ON or OFF state released from the operation by the plunger 26, and the non-locking state of the operation handle 12 is detected by the sub-control unit SC based on the data (information or signal). In this state, after opening the lid housing 3 and injecting a predetermined amount of water from the upper surface opening 4A of the chamber 4 into the water tank 37, an object to be sterilized such as a durham tube is accommodated in the chamber 4,
The lid housing 3 can be closed (the lid 5 closes the upper surface opening 4A of the chamber 4).

By closing the lid housing 3 (the lid 5 closes the upper surface opening 4A of the chamber 4), the lock arms 10A and 10B are restored by the coil spring 19 as described above, and the claw portion 1
0A1 and 10B1 are in a state of being locked on the locking portions 11 and 11 of the lid 5. At the same time, the respective operating bodies 7A1 and 7B1 of the closure detection switches 7A and 7B are pushed, and the closure detection switches 7A and 7B are switched to ON or OFF. Based on the data (information or signal),
The sub controller SC detects the closed state.

As described above, the lid housing 3 is properly closed (the lid 5 closes the upper surface opening 4A of the chamber 4), so that the state of the lid detection switches 7A and 7B and the operation handle lock detection switch 28 at that time Data (information or signal) is input to the sub-control unit SC, and the sub-control unit S
Based on the data (information or signal) from C, the main control unit MC determines that the lid housing 3 is properly closed (the lid 5 closes the upper surface opening 4A of the chamber 4), and the start unit 31E. By pressing, the operation of the high-pressure steam sterilizer 1 can be started.

In such a state that the operation of the high-pressure steam sterilizer 1 can be started, the course selection unit 31C selects the course to be sterilized by operating the setting unit 31 provided at the front part of the lid housing 3 and selecting the course. The LED of the course (operation mode) display section 32C is turned on according to the course, and when the temperature display section 32A is viewed and the sterilization set temperature, the exhaust temperature, etc. are to be changed, the up / down section 31G sets the predetermined value. If OK, the setting confirmation unit 31D is turned on.

In order to start the operation of the high-pressure steam sterilizer 1, the solenoid 25 is energized (ON) by pushing the start portion 31E to turn it on, and the plunger 26 protrudes as described above to restrain the operation handle 12 in the locked state. . Then, the plunger 26 is an actuator 2 of the switch 28.
8A is operated, and the switch 28 is turned ON or OFF. As a result, it is detected that the operation handle 12 is locked by the solenoid type locking device 24, and the sub-control unit SC recognizes the ON or OFF of the switch 28 at this time, and the main control unit MC receives the signal. As shown in FIG. 5, the sterilization process is started from time T1. By the start of the sterilization process, the setting unit 3
On the basis of data (information or signal) from the sub-control unit SC based on the operation of 1, the main control unit MC starts the sterilization process from time T1, as shown in FIG.
6 is energized.

In the above case, when the selected course is reserved and sterilization is started at the desired time, the reservation setting unit 31B is turned on, the time setting unit 31A is turned on, the desired time is set by the up / down unit 31G, and OK Then, the setting confirmation unit 31D is turned on. While looking at the temperature display part 32A,
After setting the sterilization set temperature, the exhaust temperature, etc. by the up / down unit 31G, if it is OK, the setting confirmation unit 31D is turned ON. Then, in order to start the operation of the high-pressure steam sterilizer 1, the start unit 3
Press 1E to turn on and wait.

At the start of operation, that is, when a start signal is input by pressing the start portion 31E, if at least one of these lid detection switches 7A and 7B and the operation handle lock detection switch 28 is When not in the detection state, the data (information or signal) is input to the sub-control unit SC, and the main control unit MC performs control so as not to start the operation of the high-pressure steam sterilizer 1. A warning voice is emitted from the speaker SP by the voice synthesizing means that the sound is not in a normal state, and the sterilization process is not started but is stopped.
As one of the detection methods of the states of the lid detection switches 7A and 7B and the operation handle lock detection switch 28, check data (
There is a method that is confirmed by a response of information or a signal).

By the start of the sterilization process, the water in the water tank 37 is heated by the heater 36 to generate water vapor in the chamber 4, and the air and moisture in the chamber 4 are changed by the main controller MC based on the detection of the temperature sensor 40. The operation of exhausting from the exhaust valve 40 to the outside is repeated, and when the temperature in the chamber 4 reaches a predetermined boiling point a predetermined number of times, the exhaust valve 40 is closed, the air venting process is terminated, and the process proceeds to the heating process.

When the temperature in the chamber 4 reaches the sterilization set temperature in this heating process, the process proceeds to the sterilization process, and the main controller MC controls the energization of the heater 36 to perform sterilization, and sterilizes at time T2. When the set time ends, the relay is turned off and the heater 36 is turned off. At the same time, the main control unit MC opens the exhaust valve 40 and proceeds to the cooling process. For example, the pressure in the chamber 4 detected by the pressure sensor 43 at time T3 is reduced to atmospheric pressure that is a predetermined safe pressure value. Then, the main control unit MC receives the data (information or signal), the sub-control unit SC is operated by the data (information or signal) from the main control unit MC, and the solenoid 25 is de-energized (OFF). Thus, the plunger 26 is retracted. When the plunger 26 is retracted, the operating body 28A of the switch 28 is restored, and the switch 28 is turned ON or OFF. When the switch 28 is turned ON or OFF, the sub-control unit SC recognizes the unlocked state of the operation handle 12 by the solenoid-type locking device 24, the main control unit MC receives the data (information or signal), and the lid housing 3 is It is determined that the cover can be opened (the lid 5 can open the upper surface opening 4A of the chamber 4). In this case, if for some reason the plunger 26 is not retracted and the actuating body 28A of the switch 28 is kept pressed, the sub-control unit SC detects the state, and the data (information or signal) is transferred to the main control unit MC. In response, the speaker SP issues a warning that the operation handle 12 is locked. As described above, when the sterilization operation is completed and the pressure in the chamber 4 is reduced to the atmospheric pressure, which is a safe predetermined pressure, the solenoid-type locking device 24 operates and the operation handle 12 is unlocked. The lid housing 3 can be opened (the lid 5 opens the upper surface opening 4A of the chamber 4).

In the above configuration, when the pressure inside the chamber 4 exceeds the atmospheric pressure, the solenoid-type plunger 51 controls the turning operation of the handle 52 to an impossible state and prevents the drain valve 49 from being opened and closed. Thus, the high temperature and high pressure steam is prevented from being ejected when the handle 52 is rotated and the drain valve 49 is opened. Further, when the inside of the chamber 4 exceeds the atmospheric pressure by the main controller MC, the drain pipe 50 is opened when the inside of the chamber 4 is pressurized in order to control the drain electromagnetic valve 48 to be closed. Therefore, stable and safe operation can be obtained.

Further, since the lock arm 10 is urged by the spring 19 in the locked state,
By grasping the operation handle 12 with a hand, the locked state of the lock arm 10 can be released, and the configuration and operability are simple.

In addition, when the lid detection switch 7 is provided and the lid housing 3 is not in a properly closed state by the switch 7, the operation of the high-pressure steam sterilizer 1 is not started, and thus the safety is further improved. Become.

In addition, during operation, the solenoid lock device 24 that holds the operation handle 12 so as not to move forward is held, and the lid is accidentally opened during the operation, so that the user is damaged such as burns. Safety is improved so that nothing happens. Since the operation handle lock detection switch 28 is actuated by the protruding plunger 26 of the solenoid-type locking device 24, it is possible to reliably detect that the operation handle 12 is locked by the detection switch 28, and to ensure safety during operation. Will be improved.

Further, since the lid detection switch 7 is provided with two switches 7A and 7B as a plurality of switches, the lid housing 3 is biased and closed, such as when it is not properly closed, In the case of a switch failure or the like, the state can be detected by one of the closed lid detection switches 7A and 7B, so that safety at the start of operation is further improved.

In addition, during operation, the solenoid lock device 24 that holds the operation handle 12 so as not to move forward is held, and the lid is accidentally opened during the operation, so that the user is damaged such as burns. Safety is improved so that nothing happens.

Further, under the overall control of the main control unit MC provided in the sterilizer body 2, the control of the operation unit 30 provided in the lid housing 3, the operation detection of the closure detection switches 7A and 7B, and the operation handle lock detection switch Since the sub-control unit SC can detect the operation 28 and control the solenoid 25 using the sub-control unit SC, the lid housing 3 can be set with an operation mode setting unit 31 and an operation mode display unit 3.
2 is suitable for adopting a configuration in which the operation unit 30 having 2 is arranged to improve operability. During the sterilization operation, the operation handle 12 is maintained in the locked state by the solenoid-type lock device 24. Therefore, the lid opening operation is prevented during the sterilization operation, and safety can be ensured.

Further, the main controller MC on the sterilizer body 2 side and the sub controller SC on the lid housing 3 side are based on a microcomputer control system, and in the embodiment, the number of lines is combined so that the number of lines is six. Can be achieved with a limited number of wires, wiring is simplified, and assembly is easy.

As described above, the main control unit MC energizes the heater 36, the exhaust valve 40, and the like based on transmission / reception of signals to / from the sub control unit SC and signals from the pressure sensor 43 and the temperature sensors 45, 46, 47. Since the control is performed in accordance with a predetermined sequence, the main control unit MC
Exchange of data (information or signals) with the sub-controller SC, pressure sensor 43, temperature sensor 45,
Based on the abnormal signals from 46 and 47, the warning mode is set, and this is warned by sound generation from the speaker SP.

The present invention is not limited to the configurations shown in the above-described embodiments, but can be applied to various forms of high-pressure steam sterilizers, and includes various forms within the technical scope of the present invention.

It is a front perspective view of the high pressure steam sterilizer concerning the present invention. Example 1 It is a front perspective view of the state where the lid of the high-pressure steam sterilizer concerning the present invention was opened. Example 1 It is a front perspective view of the state which removed the cover of the sterilizer main body of the autoclave sterilizer concerning the present invention, and opened the lid. Example 1 It is a piping system diagram of the high pressure steam sterilizer concerning the present invention. Example 1 It is process operation | movement figure of the high pressure steam sterilizer which concerns on this invention. Example 1 It is a side view which shows the locking means of the lid | cover of the high pressure steam sterilizer which concerns on this invention in a cross section. Example 1 It is a front perspective view which shows the lock | rock means of a high-pressure steam sterilizer which concerns on this invention, a cover detection switch part, and the part of the locking device of an operation handle. Example 1 It is a front perspective view which shows the cover detection switch part of the high pressure steam sterilizer which concerns on this invention, and the part of the locking device of an operation handle. Example 1 It is a top view which shows the operation handle part of the high pressure steam sterilizer which concerns on this invention, the lock | rock means of a lid | cover, and a closure detection switch part. Example 1 It is a front perspective view which shows the operation handle part of the high pressure steam sterilizer which concerns on this invention, the lock | rock means of a lid | cover, the lock device of an operation handle, and a closure detection switch part. Example 1 It is a top view which shows the operation part of the high pressure steam sterilizer which concerns on this invention. Example 1 It is a block diagram which shows the control part of the high pressure steam sterilizer which concerns on this invention. Example 1

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... High-pressure steam sterilizer 2 ... Sterilizer body 2A ... Upper wall of sterilizer body 3 ... Lid housing 3A ... Grip handle part 4 ... ··· Chamber 4A ··· Upper opening of chamber 5 ··· Lid 7 ··· Closed lid detection switch 7A and 7B ··· Closed lid detection switch 7A1 and 7B1 ··· Actuator 8 ... Shaft 9 ... Supporting part 10 ... Lock arm 10A, 10B ... Lock arm 10A1, 10B1 ... Lock arm claw part 10A3, 10B3 ... Lock Arm locking portion 11... Locking portion 12... Operating handle 13... Coil spring 14... Supporting base material 15 ... Long hole 16 ... Guide pin 17 ... Operating parts 17A, 17B ... Working arms 18 ... Ring portion 19 ... Coil spring 20 ... Holding member 20A ... Drain hole 21A, 21B ... Actuating rod 22A, 22B ... Coil spring 23A, 23B ... Stopper 24 ... · Solenoid locking device 25 ··· Solenoid 26 ··· Plunger 27 ··· Drooping side 27A · · · Dropper side hole 28 · · · Operation handle lock detection switch 28A · · · Operation handle lock detection Switch operating body 30... Operation part 31... Setting part 32... Display part 33 ... Caster 34 ... Exhaust vessel 35 ... Pressure gauge 36 ... Heater 37 ... Water tank 38 ... Pressure relief valve 39 ... Pressure relief pipe 40 ... Exhaust valve 41 ... Exhaust pipe 42 ... Vacuum break valve 43 ... Digital pressure Sensor 45, 46, 47 ... Temperature sensor 48 ... Drain solenoid valve 49 ... Manual drain valve 50 ... Drain pipe LK ... Lock means MC ... Main control Part SC ... Sub control part SP ... Speaker

Claims (1)

  A chamber having a top opening provided in the sterilizer body, a lid housing supported by a hinge portion that can be opened and closed on an upper rear side of the sterilizer body, and a lid for sealing the top opening of the chamber. In a high-pressure steam sterilizer for sterilizing a stored object to be sterilized under high-pressure steam, locking means for locking the lid in a sealed state on the upper front side of the main body of the sterilizer; An operation handle for releasing the lock, a solenoid-type lock device for locking the operation handle so as to prevent the unlocking operation, and a state in which the lid housing is properly closed with respect to the sterilizer body (the lid is A plurality of lid detection switches for detecting that the upper surface opening of the chamber is sealed) at the front of the lid housing, and the solenoid type The lock device includes a solenoid attached to the lid housing, a plunger actuated by the solenoid so as to prevent the unlocking operation by the operation handle, and an operation handle lock detection switch actuated by the plunger, The high-pressure steam sterilizer is characterized in that the operation is not started when all of the lid detection switches and the operation handle lock detection switches have not detected normal states at the start of the operation of the high-pressure steam sterilizer.

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