When the temperature of the autoclave reaches the air, how can it be automatically cooled down witho

This is a high-risk industry. Be sure to operate cautiously and conduct fault checks as required.

1) The instrument leaks and the pressure cannot meet the requirements.

Instrument air leakage is commonly found in the sealing rubber ring on the upper cover of the instrument. It is caused by damage to the rubber ring due to the aging of the rubber ring or the rotation of the upper cover.

Treatment: Take out the sealing rubber ring and reinstall it, and the damage is not serious, and it can be treated with talcum powder; Aged or badly damaged must be replaced.

2) The safety valve works abnormally, and the pressure is too high to relieve the pressure.

The safety valve is a protective barrier behind the autoclave. When the instrument works abnormally, it will automatically jump up and relieve the pressure when the pressure is greater than 127MPa, so as to protect the safety of the instrument and the operator.

Solution: Manually open the safety valve to relieve pressure when the pressure is about 108MPa to prevent the safety valve from rusting for a long time; When the damage is serious, it must be replaced and re-debugged by professional maintenance personnel.

3) The instrument cannot be vented and discharged normally, resulting in a large difference between pressure and temperature, and it cannot be sterilized normally.

Usually the "autoclave jet" is because the internal pressure has exceeded the set value of the safety valve, the high-pressure steam is released through the safety valve to reduce the pressure, under normal circumstances, the temperature control of the sterilizer will control the pressure within the required range, the temperature (steam pressure) will automatically stop heating when the temperature (steam pressure) reaches the set value, the internal steam pressure will no longer rise, and the steam pressure in the process does not exceed the threshold of the safety valve, of course, it will not work to release the pressure.

Check whether the safety valve is normal every day, and accept the mandatory verification of the measurement department to ensure the normal operation of the pressure vessel.

Check the containment system, there may be air leaks, and see.

The pressure cooker can be used for disinfection and sterilization, but the sterilizer is used instead of the pressure gauge and temperature gauge for sterilization.

It's fine, but the time has to be controlled.

It doesn't matter. It's still a little short of the danger index.

The internal pressure of the autoclave varies according to the medium being killed, like the medium we commonly use, which is 115kpa when sterilizing them

The maximum temperature of atmospheric water is 100 degrees, but the temperature of steam can be higher.

This is like our pressure cooker, which is artificially achieved through vacuuming.

Solution: 1) endothermic Q=cm (T2T1

j/（kg?℃）5kg×（115℃－15℃）=j；2) According to the topic, when the air pressure in the pot is not higher than 1 standard atmosphere, the resistance of the pressure sensor is r1

By Ohm's law, the electric current in a circuit.

i1<>

The zero starting point of the pressure sensor should be marked on the ammeter A1

dial.

3) Ammeter A2

When the indication number is I260mA, the thermistor resistance value is R2

<> from the data in the table, it can be seen that the change in temperature with resistance is linear, with an increase in temperature of 5 and a decrease in resistance of 10

The resistance changes from 80 to 75, and the resistance decreases by 5, then the temperature rises and the temperature in the pot is t3

Because when using autoclaving, it is extremely important to remove the cold air from the autoclave, because the expansion pressure of the air is greater than the expansion pressure of the water vapor, so when the water vapor contains air, the temperature of the airborne vapor is lower than the temperature of the saturated steam at the same pressure.

The consequences of opening the lid before the pressure drops to "0" can be as follows: the pressure of the pressure cooker drops suddenly, causing the solution in the container to eject out of the container opening, causing contamination or scalding.

Precautions for the use of autoclaves:

1. The water in the pot must be distilled or purified;

2. The items to be sterilized should not be placed too tightly;

3. The nut of the lid must be tightened symmetrically;

4. The cold air must be fully discharged, otherwise the temperature in the pot will not reach the specified temperature, which will affect the sterilization effect.

At the same temperature, the sterilization effect of damp heat is greater than that of dry heat, and when using an autoclave for sterilization, the removal of cold air in the autoclave is completely important, because the expansion pressure of air is greater than the expansion pressure of water vapor, so when the water vapor contains air, at the same pressure, the temperature of the airborne steam is lower than the temperature of the saturated steam.

If the pressure does not drop to 0, open the exhaust valve, the pressure in the pot will drop suddenly, and the medium in the container will rush out of the mouth of the flask or test tube due to the imbalance of internal and external pressure, causing the tampon to contaminate the medium and contaminate.

Draining is to improve heat conductivity.

Dropping to 0 prevents it from being turned on**.

Hello, glad your question Shanghai Tongwei told you the answer I hope to be.

Yes to the pressure gauge that was formulated.

It's just that when the temperature reaches it, it can kill bacteria.

(1) When the current is i1=, the resistance value of the thermistor r1=20, and the power supply voltage u=i1r1+i1r0=

When the current is i2=, the resistance value of the thermistor r2=7, and the supply voltage u=i2r2+i2r0=

Lianli is available. r0=5ω，u=6v；

When the temperature in the pot is 125, the current is i3=, and the resistance of the thermistor rx=u

i-r0=6v

2) It can be seen that when the temperature in the pot reaches 112, the pressure of the gas is p=;

From the condition of the equilibrium of the two forces, it can be seen that ps=p0s+mg, i.e., :, and the solution obtains: m=

Answer: (1) When the temperature in the pot is 125, the resistance value of the thermistor Rx is 5;

2) The mass of the metal body is:

Generally speaking, the pressure of a pressure vessel indicates the pressure in excess of atmospheric pressure. If the pressure is marked at one atmosphere, the internal pressure should be two, and the temperature is expected to be 120 degrees.

The maximum atmospheric pressure is, while the high pressure is, the unit is different!

Speaking of high pressure, how can it be the same as atmospheric pressure?