》Constant temperature control (constant temperature control):

Fixed value control, in simple terms, means that only one temperature value can be set each time the temperature is set, and then the oven starts heating to this temperature setting value, and then maintains this temperature setting value. After a period of time, the oven automatically stops heating. Data from hocheck

            《定值控制》                              《程序温度控制》

》Program temperature control (program control):

Program temperature control, in simple terms, is to set multiple temperature values each time the temperature of the oven is set. After the oven starts to operate, it will start to heat up or cool down in sequence according to the set temperature values (because the oven usually has no cooling function, it can only control the temperature rise). Each temperature point will be matched with a time value, and when the time expires, it will jump to the next temperature value, The operation will not stop until all the temperature values are reached in sequence.

As shown in the above figure, this is a 4-stage programmable temperature control. The temperature starts to rise from normal temperature to the set value 1. After a period of time, it will drop to the set value 2. After a period of time, it will rise to the set value 3. After a period of time, it will rise to the set value 4. After a period of time, the oven will stop running because all the set values have passed.

》In addition, it should be noted that the oven itself is a heating machine, and there is no cooling device. Therefore, when the temperature setting value of this section is lower than the temperature setting value of the previous section, it must take a long time to cool down naturally, as in paragraphs 1 to 2 above.