Heat guns( fan heaters) were scolded for their ability to burn air. Not surprising. Such devices are designed to work in hangars and on construction sites. There is enough oxygen, the goal is to quickly heat people and technology. Modern fan heater no longer burns oxygen. Consider what are, on what basis the principles of work, why it is advantageous to take the model and in what cases.
Pros and cons
Forced airflow - the fastest way to equalize the temperature in the room. Effective for purposeful action on the object, but people do not seek to fall under the stream for obvious reasons. Not everyone likes this. Fans rustle, if a certain object falls on the grid in front of the spirals, we get a fire.
Forced airflow in an
fan heater Already mentioned that a thermal fan blows air. The analogy with the open-hearth furnace, where the steelmaker for the best burning of coke pumps oxygen with the help of furs, is appropriate. Fresh air will cause the fuel to burn with such intensity that the furnace is heated to the desired temperature.
Let's see how a typical heat fan works. Inside the case with an impressive system of grids and slots fit a pair of spirals. Located in the front, where the air flow blown by the fan goes outside:
- rotate blades;
- air enters through multiple slots;
- blows hot spirals;
- warm flow raises the temperature in the room.
Heater with a fan form an effective pair that allows you to dramatically increase the impact of the device. Let's see how a typical electric fireplace of the last century is made. There are two spirals of nichrome, wound on a rod of ceramic or similar heat-resistant material. The wire during the passage of the current is heated to an incredible temperature, the metal is red-hot. By the way, the phenomenon is possible when heated to 500 degrees. The metal, brought to a high temperature, begins to glow. When this occurs, intense radiation of heat in the infrared range, here comes into play reflector. Like a mirror, it reflects energy in a given direction.
Efficiency of the device is high. Heats the room for the night, dries things, does not allow to cling to furniture in the dark, illuminating the situation with dim radiance. Two drawbacks have been noticed in the device, forcing us to look for new ways and methods:
- The device burns air. More precisely, the oxygen is consumed for the burning of dust, which hovers around, and the metal slowly burns. The latter process can not be called significant, otherwise the spirals of nichrome would be expended at an increased rate, increasing operating costs. An oxide film forms on top of the alloy, preventing the molecules of the helix from combining with oxygen. Otherwise, the service life of the heater will be short.
- The efficiency of typical electric fireplaces did not differ much. A certain amount of energy was transformed into light. Modern infrared heaters are far ahead in this regard. The only drawback is that only bodies within the line of sight can give heat.
In addition, infrared heaters shock air dry. In the old constructions, special open containers were placed over the spirals to eliminate the defect, where it was necessary to pour water. In areas where increased rigidity, the fluid had to be further filtered. Or use distilled water.
Why do we need fan heaters
With the efficiency of infrared heaters figured out. Let's say it more - they are leaders in the mentioned index today. What if the perimeter of the room is heavily cut, and we want to provide heat to the corners. It is uneconomical and inefficient to take on every nook of the infrared heater. It is much easier to get around circulating air to make the process go faster, get ready to introduce forced convection.
Thus came to the fan heaters. The devices mentioned spirals blown blades, the process of heat transfer is much more efficient. The main thing is that the air circulates and reaches the corners. If the helix is covered with an inert and heat-resistant material, the oxygen burning feature is solved. Largely due to lowering the temperature of the heating element.
Ceramics endowed with inertia, therefore, not too hot. In this case, part of the energy goes through infrared radiation. In aggregate, the situation leads to a positive effect. However, ceramics-covered spirals for fan heaters are protected by a grill. In appearance, it resembles the construction of mikatermichesky copies. The meaning is common. However, the fan heater is much smaller in size, has a lower temperature: a decent amount of energy carries the passing stream.
A typical fan heater consists of:
- Spirals coated with mica.
- control schemes.
Not too different from the one described. Due to the ceramic, the fan with the heating function does not burn much oxygen. The heater is called a fan for a simple reason: manufacturers are showing a tendency to produce products called two in one. The said case falls within the definition.
Fan Heaters from the Cool Point of View
Heated fan comes in two designs:
- Compact “mikatermichesky heater”.
- "The internal unit of the split-system."
Limited to relevant comparisons. By the way, it is quite possible to call a split system a fan heater. The essence of the total. Sometimes it is permissible to refer to a fan with a heating function. But this is a stretch, the work of the split-system strongly depends on weather conditions. At temperatures below zero is not recommended.
The internal device is already outlined, let's talk about the functionality. Heated fan works in two modes:
- Ordinary fan.
- Fan Heater.
A set of buttons and indicator lights is provided for control on the panel. It is possible to include separately one spiral( or together), set the desired room air temperature. Smart equipment will independently take the necessary measurements, will control the heating in terms of maintaining the necessary conditions. This is useful at night when households sleep, but it is not recommended to leave the fan with heating function unattended for all day round.
The option of controlling shutters is available for wall models. In this regard, the devices do not differ from the internal units of split-systems. However, they cannot work on cooling. These devices delightfully complement each other.
It is pleasant when the fan for heating is supplied with a control panel. Unlike the one supplied with the split system, an instance of this type is simple. For example, there are four buttons:
- On, off.
- Blinds control.
- Set thermostat parameters.
- Launching individual spirals.
Manufacturer emphasizes the simplicity of the device. Electric heater with a fan suitable for older people. By the way, the buttons on the remote control are large, the difficulties with vision are not a hindrance. Easy to learn the location of the keys to the touch.
The advantages of modern
Note that none of the devices seen on the instrument window did not consider options for increasing the humidity in the room. A disadvantage of this factor due to respiratory diseases. The humidity value should be constantly maintained within 40 - 60%.Similar indicators block the development of diseases; for a full effect, high-quality humidifiers disinfect the environment by ultraviolet irradiation or other means.
Search engines often search for an oil heater with a fan, but the device has not yet come to the authors. The inclusion of a rotating part in the design will greatly reduce the reliability of unpretentious devices. It is for certain known that the equipment is protected from falling by special sensors, rarely become the cause of a fire. Perhaps the fan will increase the fire hazard design.
With other things, the temperature of the oil heater is relatively small. If you blow the accordion case with increased speed, you will not achieve much effect. But you will find oil heaters with a chimney effect, where a special form of the body ensures enhanced air circulation in the vertical direction. This increases heat transfer, speed is sufficient for the temperature of the oil heater. At the same time not a single kilowatt of energy is spent. The described option is useful.