JPS5818111Y2 - Infrared radiation drying and heating device using combustion gas - Google Patents

Description

[Detailed explanation of the invention] This invention uses a forced fan to supply the air necessary for combustion.
Burn liquid or gaseous fuel in an oil or gas burner.

- Air introduced from another air blowing hole by a fan is passed through the gap between the combustion chamber cylinder and outer cylinder, and is mixed with high-temperature combustion gas near the combustion chamber outlet while preventing overheating of the cylinder wall surface of the combustion chamber. To dilute and increase the amount of hot gas, pass it through a detour or a radiation circuit configured in a straight line, and appropriately adjust the ratio of the amount of air for combustion and the amount of air for dilution/increase using an adjustment mechanism. The present invention relates to a device in which the surface temperature of a radiation circuit is raised to a desired arbitrary temperature, and infrared rays having a desired arbitrary wavelength are effectively concentrated on the front surface by a reflecting plate provided on the back surface of the radiation circuit.

The features of this invention are as follows.

(1) As mentioned above, since it has an adjustment mechanism that can adjust and supply the amount of air required for combustion and the amount of air to dilute and increase the hot gas at any ratio, it is possible to adjust the surface temperature of the radiation circuit to the desired level. It can be tuned to best suit any wavelength of infrared radiation.

In other words, increasing the amount of air for dilution or increase will lower the surface temperature of the radiation circuit and emit long-wavelength far infrared rays; conversely, decreasing the amount of dilution air will increase the surface temperature of the radiation circuit and emit far-infrared rays with short wavelengths. Emit infrared rays.

In particular, it is easy to obtain the optimal surface temperature for far-infrared radiation, which has recently attracted attention as being effective for drying and heating.

The adjustment function can be further enhanced by adjusting the amount of air blown by the forced fan.

(2) Since the amount of hot gas is increased and flows through the radiation circuit,
A more uniform surface temperature is achieved throughout the radiant circuit from the inlet to the outlet, resulting in a more uniform drying or heating effect.

(3) Conventionally, an infrared radiation dryer (heater) and a warm air dryer (heater) were each independent, but according to the device of this invention, infrared radiation and warm air are used simultaneously. Moreover, the ratio of both energies can be arbitrarily changed within a certain range.

That is, according to the device of the present invention, in addition to the energy radiated from the radiating circuit, the hot gas discharged from the end of the radiating circuit can be used as hot air.

Furthermore, the relationship between the radiant energy and the hot air energy can be arbitrarily changed by adjusting the ratio between the amount of combustion air and the amount of dilution/increase air using the adjustment mechanism as described above.

In this way, the device of the present invention reduces the input thermal energy by 1
It has great practical value in that it can be used 00% effectively.

(4) There is an idea to install a suction fan at the end of the radiant circuit instead of the push-in fan to suck and introduce air (the present applicant has applied for a radiant heater that also serves as a hot air fan, No. 7953, 1983). ) In this case, the temperature of the gas sucked by the fan differs considerably between when combustion starts and when the temperature of each part of the radiation circuit reaches a certain temperature after a while, so the mass of the sucked gas changes, resulting in a problem. It may happen.

To be more specific, in the case of a suction fan, air at room temperature is sucked in when the burner is started, but once combustion begins, combustion gas is sucked in at a considerably higher temperature than room temperature, even though it is diluted and the amount is increased.

Therefore, if you set the fan's air volume adjustment port to the appropriate amount of air at startup, as combustion begins and the temperature of the suction gas increases, the specific gravity of the gas will decrease, and the mass of the gas being sucked will decrease. As a result, the combustion performance will deteriorate due to air shortage.

On the other hand, if the amount of air is set to an appropriate amount during combustion, there will be a slight excess of air when the burner is started, reducing ignition performance.

Although this problem generally poses no problem in practical use, it may cause some degree of trouble, especially in cold regions such as Hokkaido.

The present invention improves these drawbacks.

In other words, the present invention does not use a suction fan, but instead installs a forced fan at the inlet of the radiation circuit, so as mentioned above, the temperature of the gas entering the fan does not change with the elapse of burner operation time, and remains almost the same at any time. Since air is taken in at the same temperature (room temperature), the performance of the burner is stable and the above-mentioned drawbacks are eliminated.

An embodiment of the present invention will be described below with reference to the accompanying drawings.

In the figure, 1 is a forced fan that supplies the air necessary for combustion and the air necessary to dilute and increase the amount of combustion gas, 2 is an ignition transformer 2' for igniting the fuel, and a nozzle 10 for injecting the fuel. 3 is a combustion chamber consisting of an inner cylinder 3' and an outer cylinder 3'', 4 is a radiation circuit for emitting infrared rays, 5 is a reflector for effectively concentrating the infrared rays forward, 6 is a control panel for managing combustion and temperature, 7 is an oil tank, 8 is a pump for supplying oil under pressure, 9 is the amount of air necessary for combustion and dilution of combustion gas,
10 is a nozzle for injecting fuel, and 11 is a shutter for adjusting the air volume at the inlet of the forced fan.

Note that this figure is an example for liquid fuel; in the case of gaseous fuel, a cylinder container is installed in place of the oil tank 7, or if city gas is used, these are unnecessary, and the pump 8 is also unnecessary. Become.

In addition to the cylindrical circuit shown in this figure, the detour of the radiation circuit 4 may be a square tube or a partition circuit.

4' is a support frame for the radiation circuit 4.

Next, briefly explaining the operation of this device, fuel is ignited and combusted in the burner 2, and further mixed sufficiently with air supplied from the forced fan 1 in the combustion chamber 3 for complete combustion.

The high temperature combustion gas coming out from the end of the combustion chamber 3 is controlled by the adjustment mechanism 9.
The inner cylinder 3' of the combustion chamber and the outer cylinder 3 are distributed in an appropriate ratio by
is diluted by the air supplied from the forced fan 1 while preventing the cylindrical wall of the combustion chamber from overheating through the passage between the
At the same time, the amount of gas increases and is sequentially swept away through the radiation circuit 4 in the direction of the arrow, and is discharged into the atmosphere from the end of the radiation circuit 4.

As a result, the radiation circuit 4 is heated and infrared rays are radiated from the same surface, which can be effectively used for drying and heating.

The distribution adjustment of the adjustment mechanism 9 is further enhanced by adjusting the air flow rate of the forced fan 1 using the shutter 11, and the adjustment mechanism 9 is moved to the nozzle 10 side (front) to reduce the amount of air going to the nozzle 10 side. When the shutter 11 is opened and the amount of air blown is increased, the surface temperature of the radiation circuit 4 further decreases, and conversely, when the adjustment mechanism 9 is moved rearward and the shutter 11 is closed, the surface temperature of the radiation circuit 4 is further increased.

The attached drawing shows a screen-type embodiment, but other application examples include radiators configured in a flat shape (panel type), a straight line (line type), or a U-shape (U-shape). A ceiling-mounted type where the circuit is suspended from the ceiling and emits infrared rays downward or diagonally downward, or a radiation circuit with the above configuration is placed on the floor or buried in a pit made in the floor. There are various application examples such as a floor-standing type or a floor-standing embedded type that emits infrared rays upward or diagonally upward.

[Brief explanation of drawings]

The attached drawings show an embodiment of the present invention using oil. It is.

Claims (1)

[Scope of utility model registration request] A detour or linear radiation circuit (hereinafter referred to as radiation circuit) for radiating infrared rays, a reflector plate for effectively concentrating infrared rays emitted from the radiation circuit on the front side, and provided at the entrance of the radiation circuit. It has a combustion chamber consisting of an inner and outer double cylinder and a forced fan that are suitable for complete combustion.The air and fuel necessary for combustion are injected and ignited into the inner cylinder of the combustion chamber to achieve almost complete combustion within the inner cylinder. Air is supplied between the outer and outer cylinders to dilute and increase the amount of combustion gas generated in the inner cylinder, and the ratio of the amount of air between the dilution and increase air and the combustion air can be arbitrarily changed. An infrared radiation drying and heating device characterized by having such a mechanism.