Why Do We Need Ovens With Several Glasses In The Door?

Why Do We Need Ovens With Several Glasses In The Door?

The number of oven door glasses plays a very important role when choosing an oven since first of all it is the safety of you and your loved ones. In all ovens, the inner glass is heat-resistant, the outer glass is tempered.

When using the oven, we most often touch the control panel and the outer surface of the door. Therefore, it is very important that they are comfortable and safe. The door must not become hot or burn when touched. This is especially true if the family has small children or pets.

Why Do We Need Ovens With Several Glasses In The Door

Oven operating temperatures

The capabilities of the oven largely depend on the range of its operating temperatures. Typically, a gas oven can heat up to 480 °F. For electric ovens, the range is wider – from 120 to 660 °F. At the same time, maximum temperatures are usually used rarely, usually when cooking pizza or fast roasting meat.

For electric ovens with pyrolytic cleaning, the maximum temperature is 930 °F. Such heating is necessary so that all food residues and drops of fat burn down, turning into ashes. Then it is enough to wipe it with a damp cloth from the surface of the chamber.

How fast does the door heat up?

In modern ovens, the security system is thought out in such a way that even when operating at maximum temperatures, the heating of the outer surface of the oven does not exceed a safe 120 °F. Normal operation of the oven for one and a half to two hours at an average temperature of 390 °F is absolutely not dangerous. Especially if the model is equipped with tangential cooling functions and automatic shutdown when the door is open.

How protective glasses work

High-quality oven doors are made with laminated glazing. As a rule, four-layer glazing is used in ovens with pyrolytic cleaning. Due to the air gap between the panes, the outer surface of the door remains cold.

First, the inner glass is subjected to the highest heating by hot air. It is made of heat-resistant, tempered, fire-resistant glass. The heating temperature of the next glass is significantly reduced due to the air insulation between the glasses. Accordingly, the outer glass is almost at room temperature. The outer glass is decorative, but it also withstands heat well.

The cold front technology provides complete protection against burns when touching the door of an operating oven. At the same time, the oven door does not heat up. Such multi-layer glazing also ensures the high efficiency of the oven. The presence of additional glasses allows you to avoid unnecessary heat loss during operation. Accordingly, the dishes will be cooked faster, the appliance will consume less electricity.

Features in pyrolysis mode

Pyrolysis is the most radical and effective way to clean the working chamber of the oven. This cleaning is done completely automatically. It should be understood that when performing pyrolytic cleaning, the outer side of the door can heat up to 185 °F. Therefore, during pyrolysis, and it can take up to 3 hours, it is necessary to control the device.

Built-in fans during pyrolysis work very intensively, ensuring even distribution of heat. At the end of the process, the ventilation will continue to operate automatically for a time sufficient to prevent overheating of the walls of the furniture next to the oven and the front of the oven. Manufacturers usually provide a door lock function when pyrolysis is performed. The lock is released automatically when the temperature inside the oven returns to a safe level after cleaning.

SMEG ovens

SMEG ovens combine functionality, reliability, sophisticated style, and thoughtful security system. Depending on the energy used, the manufacturer produces gas and electric models of ovens. Various sizes of ovens allow you to choose the best option for a kitchen of any size.

Depending on the model, SMEG ovens are equipped with built-in steamers, have microwave, steam, grill, spit functions. The presence of a timer, automatic cooking programs, a temperature probe and telescopic guides, tangential cooling of the body allows you to comfortably and safely cook the most delicious dishes in the SMEG oven.

3 to 4 glasses in the oven

3 to 4 glasses in the oven

Most SMEG ovens have a “cold door”. The tangential cooling system and internal heat-reflecting glass do not allow the outer surface of the door to heat up above 120 °F. The design provides for a hinged door with 3 or 4 glasses. This number of glasses is additional protection for the user from getting burned and provides the possibility of steam cleaning. Many models provide easy dismantling of the door and glass to facilitate the cleaning operation.

Three glasses ensure the safety of household appliances and reduce heat loss. Thanks to three glasses, the front part of the ovens practically does not heat up (the temperature on the surface reaches 120-140 °F (about like hot water from a tap). In addition, thanks to reliable thermal insulation and a tangential cooling system, the power consumption of the device are reduced and the risk of burnout of heating elements is reduced.

Models with 4 glasses have the coldest front The temperature on the surface during cooking will reach a maximum of 104 °F. As a rule, models equipped with 4 glasses have a pyrolytic cleaning function, this is due to the fact that when cleaning the oven, the chamber inside heats up to 930 °F. Such models of ovens will be the most expensive.

Instrument Overheating Warning

To prevent overheating, the oven is equipped with a temperature sensor, a built-in cooling system, and auto-off.

Thermal sensors are triggered when heating starts and ventilation and cooling systems start.

During the heating process, the fan on the back of the oven starts, which draws in room air from below under the door, along with the lower casing. Rising along the rear wall, hot vapors are discharged along the upper side out through the holes between the panel and the door. This is how tangential cooling occurs, that is, the flow of colder air around the inner hot chamber of the oven.

If for some reason (program failure, short circuit) the temperature cannot be lowered, the auto-off will work.

Side and door cooling

There is a small space between the inner and outer bodies of the oven. So that heat is not transferred from metal to metal, the outer frame and the heating chamber are interconnected in several places. As a result of tangential cooling, an air barrier is created around the entire inner casing.

To cool the door, manufacturers use the following techniques:

  • several glasses (usually 2, maximum 4);
  • thermal protection of glass (Cool Door);
  • glass blowing (ventilation system between glasses).

The glasses on the oven door are not located close, but at a certain distance, as in double-glazed windows. An air barrier is formed, in which the thermal conductivity from the inner glass to the outer glass decreases.

Thanks to the thermal protection layer on the outer glass of the door, the risk of burns are eliminated. Many ovens have a fan for blowing the door from the inside: it ventilates between the panes and prevents fogging.

Control panel heating prevention

Tangential cooling prevents the control panel from heating up. Cold air flows over the inner chamber and under the electronic panel, keeping wires and microcircuits intact.

In certain models of ovens, there is a “Double circulation”: the air flows in the middle of the fan are divided into warm and cold. The advantage of this cooling method is the reduction of noise and energy consumption.

The DCS+ system is an advanced version of tangential cooling. The thermal sensor with the “Cool Down” function, which is located inside the heating body, starts the fan after the oven is turned off. And it does not allow it to stop up to a level of 165 °F in the working chamber.

Instrument Overheating Warning

Exclusion of heating of nearby furniture

The inner chamber is protected by a layer of heat-insulating material (aluminum foil with a reflective effect and fiberglass).

Modern ovens have a “Fan” function that can work simultaneously with other programs. It cools the outer casing and the oven door.

Internal fans perform a dual role:

  • evenly distribute the temperature inside the cavity;
  • carry out ventilation (removal of odors and hot air) and blowing the door.

Some models are equipped with a Dynamic Cooling system, in which thermal sensors control the heating of the outer case and automatically cool it down to 140 °F. New multifunctional ovens cool themselves and prevent deformation, damage to other kitchen appliances and furniture that is nearby.

Why Do We Need Ovens With Several Glasses In The Door?

An oven is no longer just a baking tool. Modern ovens are equipped with special functions for cooking various dishes, defrosting, and creating the right temperature conditions. They are also often equipped with a cooling system, which means they are safer.

See also: All You Need To Know About Ovens From The SMEG Dolce Stil Novo Collection

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