JPS5935238Y2 - steam sterilizer - Google Patents

Description

[Detailed description of the invention] The present invention relates to a valve device for water supply and drainage of a steam sterilizer, and in particular, the object is to provide a sterilizer that is inexpensive and easy to handle without using electromagnetic valves operated by electrical control as much as possible. be.

Generally, water is supplied to the sterilization tank of a steam sterilizer from a water storage tank installed at a higher position than the sterilization tank, and a solenoid valve installed in the middle is opened due to the water level drop. When water is supplied, a liquid level switch installed in the tank detects the liquid level, and an electrical signal is used to close a solenoid valve that can be opened.

After that, the inside of the sterilization tank is heated to high temperature to perform sterilization, and when the sterilization process is completed, a separate solenoid valve is opened to discharge the high-temperature steam inside the tank, and the steam is released into the atmosphere. to force the engine to enter the exhaust stroke,
In order to detect when the exhaust stroke was completed, a mocha switch was installed inside the sterilization tank, and at the same time as the depressurization was completed, a control signal was sent to close the solenoid valve that was activated during exhaust, thus ending the entire stroke. .

Such a configuration requires at least two solenoid valves for water supply and drainage that are activated by electrical signals, etc., and also requires a mocha switch to close the solenoid valves, which naturally requires many expensive parts. It was not possible to provide this type of sterilizer at a low price.

In view of this, the present invention provides an inexpensive steam sterilizer.

To explain one embodiment below with reference to the drawings, 1 is a sterilization tank having an openable lid 2 on one side, a heater 3 for generating high-temperature, high-moisture steam is disposed at the bottom of the sterilization tank, and a heater 3 is installed on the top of the heater. A shelf member 4 is installed on the shelf 4 on which objects to be sterilized (not shown) can be placed.

Reference numeral 5 denotes a water storage tank arranged in parallel with the sterilization tank 1, and a communication pipe 6 is connected thereto so that the water stored in the tank can be supplied to the sterilization tank 1 in sequence depending on the water level drop.

A solenoid valve 7 is interposed in the communication pipe 6, and by controlling the opening and closing of the solenoid valve, a water supply stroke into the sterilization tank 1, a sterilization stroke, and an exhaust stroke after the sterilization stroke can be performed.

Reference numeral 8 denotes a check valve provided in the communication pipe 6 and located on the side of the water storage tank 5, which allows the water in the water storage tank 5 to be sent but prevents reverse flow, and allows water to flow only in the direction of the arrow. It is something to do.

9//i A branch pipe connected to the communication pipe 6 between the electromagnetic valve 7 and the check valve 8, the other end 10 of which is open to the atmosphere, and a mocha on-off valve 11 interposed in the middle.

The pressure on/off valve opens when the water pressure is higher than the water pressure of the water stored in the water storage tank 5, and remains closed when the water pressure is lower than that.

Next, the operation sequence will be described. First, by opening the electromagnetic valve 7, the water in the water storage tank 5 passes through the check valve 8 due to the water level drop and is stored in order within the sterilization number 1.

When a predetermined amount of water has been supplied, the electromagnetic valve 7 closes, and at the same time, the heater 3 in the sterilization tank 1 is made to generate heat to bring the inside of the tank into a high temperature state and begin the sterilization process.

When the sterilization process is completed after a predetermined period of time has elapsed and the solenoid valve 7 is opened, the high-temperature, high-temperature steam in the tank powerfully passes through the solenoid valve 7 and opens and closes the pressure on/off valve 11 with its own pressure. When the mocha in the sterilization tank 1 is released into the atmosphere and descends at a pressure slightly higher than the water pressure in the water storage tank 5, the pressure on/off valve 11 automatically closes, completing the entire process. .

As mentioned above, the steam sterilizer of the present invention includes a sterilization tank with an openable lid on one side, a steam generation heater disposed at the bottom of the sterilization tank, and one end of the sterilization tank to supply water from a water storage tank to the sterilization tank. a communicating pipe with the other end facing the water storage tank in the sterilization tank, and a solenoid valve on the sterilization tank side and a check valve on the water storage tank side, and one end on the communication pipe between the two valves. It consists of a branch pipe that is connected and opens the other end to the atmosphere, and a pressure on-off valve that is interposed in the branch pipe and opens at a pressure greater than the water pressure of the water storage tank, so it is operated by an electric signal as in the past. Not only are there fewer solenoid valves, they can be obtained at a lower price, but they also require less wiring for electrical control.
This results in a sterilizer that has fewer breakdowns, is extremely easy to maintain and inspect, and is easy to handle.

[Brief explanation of the drawing]

The drawing is a schematic diagram of the steam sterilizer according to the invention. 1... Sterilization tank, 5... Water storage tank, 7
...Solenoid valve, 8...Check valve, 6...
...Communication pipe, 11...Pressure opening/closing valve.

Claims (1)

[Scope of utility model registration request] A sterilization tank having an opening/closing lid on one side, a steam generation heater disposed at the bottom of the sterilization tank, and one end of the tank to supply water from a water storage tank to the sterilization tank and the other end to the water storage tank. a communication pipe having a solenoid valve on the sterilization tank side and a check valve on the water storage tank side; and a branch with one end connected to the communication pipe between the two valves and the other end open to the atmosphere. A steam sterilizer comprising a pipe and a power on/off valve which is interposed in the branch pipe and opens at a moment larger than the paddy field of the water storage tank.