SU886885A1 - Device for automatic control of sterilization process of tinned food in periodic-action autoclave - Google Patents

Description

The invention relates to the food, fish and meat industries, in particular to devices for automatically controlling the sterilization process of canned food in autoclaves., ⁵

Known devices for the automatic control of the sterilization process of canned food in a batch autoclave, comprising a temperature sensor with a converter and a program controller 10 associated with electric actuators of valves installed respectively on the drain, blow and supply lines of steam, water and air [1].

A disadvantage of the known devices is that they do not provide automatic control of the rate of temperature increase depending on the initial temperature in the autoclave, which can vary over a wide range (from + 20 ° С 20 to + 85 ° С) to a temperature corresponding to technological requirements of the sterilization process during the purge period and equal to + 100 ° С. The steam supply valve of known devices during purging is opened 25 fully. As a result of this, the temperature in the autoclave at the end of the purge cycle can fluctuate within quite significant limits, which is a violation of sterilization technology. In order to avoid disruption of sterilization technology, the autoclave manually controls the valve during purging.

The aim of the invention is to improve the quality of sterilization of canned food by regulating the rate of temperature increase depending on the initial temperature in the autoclave during the purge period.

This goal is achieved in that the device for automatically controlling the sterilization process of canned food in a batch autoclave, comprising a temperature sensor with a converter and a program controller associated with electric actuators of valves installed respectively on the drain, purge and supply lines of steam, water and air, is equipped with series-connected reochord of the position of the actuator of the valve installed on the steam supply line, a comparator and an amplifier, the output of which is connected with the program the regulator, and the comparator is connected to the transmitter of the temperature sensor.

The drawing shows a device, General view.

A device for automatically controlling the sterilization process of canned food contains an autoclave 1, an electric actuator 2 of the valve 3 on the steam supply line with a position rechord, a movable contact of the rechord 4 is connected to one of the inputs of the comparator 5, and a temperature sensor 7 in the autoclave 1 is connected to the other input through the converter 6, the output of the comparator 5 through 5 amplifier 8 and the sterilization program controller 9 is connected to the control circuit 10 of the electric actuator 2 valves 3, valves 11-14 on the purge, water, drain and air lines, controlled by the program 10 Sterilizer 9.

The device operates as follows.

The temperature in the autoclave 1 is constantly monitored by a temperature sensor 7, 15 a signal from which at the initial moment of purging is supplied to the converter 6. From the converter 6, the signal corresponding to the initial temperature of the autoclave is fed to one of the inputs of the comparator 5. 20 C of the movable contact of the rechord 4 of the valve 3 position a signal is supplied to the other input of the comparator 5. In the event of an inequality of these signals from the output of the comparator 5 through the amplifier 8, the signal is fed to the program sterilization controller 9, which controls the electric ktroprivodom steam valve 3 and simultaneously moves the contact Slidewire 4, reducing the signal applied to the input of the comparator zo

5. The opening of the steam valve will occur until the signals are compared. If the signals at both inputs of the comparator 5 are equal (zero signal at the output), the valve opens.

This mode of operation allows, regardless of the initial temperature of the autoclave, to withstand a uniform rise in temperature to + 100 ° C during the purge in accordance with a given technology and thereby improve the quality of canned food.

Claims (1)

Claim A device for automatic control of the sterilization process of canned food in a batch autoclave, containing a temperature sensor with a converter and a software regulator connected to valve actuators installed respectively on the drain, purge and supply lines of steam, water and air, characterized in that in order to improve quality sterilization of canned food, it is equipped with series-connected reocord of the position of the actuator of the valve installed on the steam supply line, a comparator and ilitelem, output of the last program associated with the regulator, and a comparator coupled to the temperature sensor transmitter.