Hot air oven

1) work

• Hot air oven The time can be set for a maximum of 24 hours and the temperature can be adjusted from 30-90 degrees Celsius. The heat will come from the heater bar. And use the fan on top of the machine to distribute heat to flow down to the raw materials. To bake, expel moisture from the bottom opening throughout the oven. Loop back out to the top as before. Continue this cycle until the desired time has elapsed. Can be a good replacement for sun exposure.

• Heat Pump Oven It is a new technology incubator. that increases the ability to control relative humidity There is a heat system generated from heater rods. through the raw material room It goes to the cold coil room and it condenses into water. to pull moisture out of the air And the air will be directed to the hot coil flowing into the raw material room again. The incubator will continue to rotate like this. 

2) The advantages of a 100% closed system are: 

• Save on labor costs Because the incubator receives heat evenly. This means you don’t have to turn the tray upside down when baking like a normal oven.
• Modern working functions, adjustable temperature, time, and humidity in up to 6 ranges, supporting a variety of production, good yield, and quality.
• Save energy Because it has a 1200w motor compared to the general model that has up to 3000w. 

3) Compare the electricity usage rate for 1 hour.

General hot air oven	The power consumption rate is 3000w in 1 hour. The average electricity cost per unit is 4.50 baht per unit. It will consume up to 13.50 baht of electricity. Give an example Calculate the units used: 3000 x 1 ÷ 1000 x 1 = 3 units/hr. Electricity cost 4.5 x 3 = 13.50 baht/hr.
Heat Pump Oven	The power consumption rate is 1200w in 1 hour. The average electricity cost per unit is 4.50 baht per unit. It will consume electricity at 5.40 baht. Give an example  Calculate the units used: 1200 x 1 ÷ 1000 x 1 = 1.2 units/hr. Electricity cost 4.5 x 1.2 = 5.40 baht/hr.

4) Test usage

Test the actual use, actually bake. The raw materials used are mangoes and bananas. They are set at the same baking temperature for both models in 21 hours. The results are as follows: 

• mango: Mangoes that are baked in a Heat Pump oven are very dry, hard and have little moisture. As for the general hot air oven, the mangoes will still have moisture and be soft.
• banana: Bananas baked in a Heat Pump oven will be noticeably very dry. As for the general hot air oven The bananas will still have moisture.

The advantage of the Heat Pump is that we do not need to bake for 21 hours. In case you want results like a normal hot air oven, just reduce the time. Got the same results. It can be said to save more energy, reduce time, reduce energy, worthwhile for SME businesses. 

Did you know? The machine can control the relative humidity. No need to use high temperatures. It will reduce the baking time. Takes 30-40% less time than a general hot air oven, reducing production costs. and the produce still retains its color, flavor, and nutrients. without being destroyed by heat as well

5) Conclusion 

Three things can be summarized: 

• Production period 
• Quality obtained
• Power consumption rate 

The Heat Pump oven is considered to be better. and meets the needs of medium-large businesses and factories that require precise, controllable quality and low production costs. As for the normal hot air oven It will answer the needs of general startup businesses that want to control the quality of their products.

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