JPH01147254A - Forced air supply/exhaust hot air fan - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a forced air supply/exhaust hot air fan that reduces the heat radiation loss of exhaust gas and takes pollution prevention into consideration.

Conventional technology Conventional forced air hot air fans use outdoor air to combust oil, etc., bring the combustion heat indoors through a heat exchanger inside the hot air fan, and then release the exhaust gas produced by the combustion. The gas was configured to be exhausted outdoors.

In addition, as a device with a humidifying function, hot air machine water 2 ・
-7 There is a model that has a humidifying tray installed above the heat exchanger of the body, and the radiant heat from the heat exchanger and combustion chamber heats the humidifying tray to vaporize water and humidify the room.

Problems to be Solved by the Invention However, such forced-exhaust hot-air fans operate at high temperatures (12
Exhaust gas (0'C to 150C) is directly discharged outdoors, resulting in a large heat radiation loss relative to fuel consumption and also causing environmental thermal pollution.

Furthermore, the exhaust gas exchanges heat with the supply air and outside air in the supply/exhaust section, and moisture in the exhaust gas condenses.

This condensed water dissolves nitrogen oxides and sulfur oxides in the exhaust gas, has an acidic pH of about 2 to 4, and is discharged as outdoor hedren. It was also a source of pollution.

Furthermore, in devices with a humidifying function, heat transfer between the heat exchanger and the humidifying tray is not effective, so the temperature of the humidifying tray is low and almost no water is vaporized, resulting in almost no humidifying effect. Ta.

Means for Solving the Problems In order to solve the above-mentioned problems, the forced air supply/exhaust hot air fan of the present invention is provided with a heat exchanger for exchanging heat between exhaust gas and humidifying water in the exhaust pipe, and A magnesium alloy is placed at the bottom of the heat exchanger.

Function In the above configuration, the exhaust gas warms the humidifying water via the heat exchanger provided in the exhaust pipe. Condensed water generated by heat exchange of the exhaust gas is neutralized by the magnesium alloy and drained.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a cross-sectional view of the forced exhaust hot air fan of this embodiment, and FIG. 2 is an enlarged cross-sectional view of the main parts thereof.

As shown in the figure, a coil type heat exchanger 1 is installed in an exhaust pipe 2, and this coil type heat exchanger 1 is connected to a humidifying water tank 3.
and is connected to the humidifying tray 4 through humidifying water pipes 5 and 6. Therefore, the humidifying water flows from the humidifying water tank 3 to the humidifying water pipe 5.
．． The coil type heat exchanger 1° passes through the humidifying water tube 6 in order and enters the humidifying tray 4.

On the other hand, combustion air is supplied from the air supply pipe 7 by the air supply fan 8 and introduced into the combustion chamber 10 via the ventilation pipe 9. In the combustion chamber 10, an ignition heater 11 ignites the gas mixture of vaporized kerosene and the combustion air. and combustion chamber 10
The exhaust gas generated in the heat exchanger 12 passes through the exhaust fan 1.
3 to the exhaust pipe 2, where it comes into contact with the coil heat exchanger 1 and is discharged outdoors.

The broken air generated by the indoor confinement fan 14 contacts the combustion chamber 10 and the heat exchanger 12 in the main body, exchanges heat with the exhaust gas, and is sent indoors as warm air.

The condensed water generated by heat exchange between combustion exhaust gas and humidifying water in the coil-type heat exchanger 1 in the exhaust pipe 2 passes through the magnesium alloy 15 installed in the groove of the exhaust pipe 2 and is used as outdoor hedrine water. It is discharged.

Furthermore, the heated humidifying water is absorbed by the fiber body 5-1.
- The air is sucked up by the air vent 16 and supplied into the room along with the warm air that is discharged into the room.

Next, the effects of the above-described configuration will be explained.

The coil type heat exchanger 1 exchanges heat using the temperature difference between humidifying water and combustion exhaust gas in the exhaust pipe 2, and the exhaust gas heat quantity Q, (l
al), exhaust gas amount mcKp:), constant pressure specific heat C of exhaust gas
p (cal/9・"C,), exhaust gas temperature T2 [℃
] and the exhaust gas temperature Tx [° C.] cooled by heat exchange, the following equation (I) holds true.

Q-mCp (T2-Tx)...Old...(I)
- As an example, if exhaust gas at 150[°C] is heat exchanged with water at 20[°C] and the heat exchange conditions are set as follows, the exhaust gas temperature will be approximately 40[°C:II] after being cooled.

Heat exchanger: Coil type heat exchanger Heat transfer area of heat exchanger: 01 [door] Flow rate of exhaust gas: 10 t31/h') The amount of heat retained in the dry exhaust gas after removing moisture from the exhaust gas discharged from the trench is The following equation (n) is obtained.

6 /, -: where n) In the formula, L: Heat capacity of dry exhaust gas (1cal/Kg:]
(C): Carbon mass ratio in fuel [%] (CO2): Volume ratio of carbon dioxide in exhaust gas [%] (C
○): Volume ratio of carbon monoxide in exhaust gas [%] Cp:
Constant-pressure specific heat of exhaust gas CmVKg·°C] tq: Exhaust temperature [°C] ta: Supply air temperature ('C).

It can be seen from equation (II) that the heat radiation loss also increases in proportion to the exhaust gas temperature. For example, 15oc"c') and 40
Applying the exhaust gas at [℃] to the above equation (II), we get 1
When the temperature is 50℃, the amount of heat loss is about four times that when the temperature is 40℃.

In other words, in this embodiment, the exhaust gas temperature can be lowered by heat exchange with the humidifying water, so there is less heat loss.
Moreover, it does not cause thermal pollution, and the temperature of the humidifying water increases by 7 to 1 inch due to heat exchange with the humidifying water, thereby promoting the evaporation of the water humidifying the room.

In fact, the condensed water generated by heat exchange of the exhaust gas is neutralized by the chemical reaction shown in the formula (In) with the magnesium alloy, thereby preventing environmental pollution due to drain water.

Mg+2HNO→H2→Mg(NO3)2...(Ill
) Effects of the Invention As is clear from the above description of the embodiments, the forced air supply/exhaust hot air fan of the present invention suppresses heat radiation loss by using the heat of the exhaust gas to heat the humidifying water. Improves thermal efficiency. Therefore, the amount of heat released outdoors is also reduced, which reduces thermal pollution to the environment.

Furthermore, the acidic condensed water produced by the condensation of water in the exhaust gas is neutralized by a magnesium alloy installed at the bottom of the heat exchanger in the exhaust pipe and drained outdoors, thereby reducing environmental pollution.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a forced air supply/exhaust hot air fan showing an embodiment of the present invention, and FIG. 2 is an enlarged configuration diagram of the main parts thereof. 1... Coil type heat exchanger, 2... Exhaust pipe, 3... Humidifying water tank, 4... Humidifying plate, 5, 6...・・Humidifying water pipe, 15・・・・・・
Magnesium alloy.

Claims (1)

[Claims] A forced air supply/exhaust type hot air fan in which a heat exchanger for exchanging heat between exhaust gas and humidifying water is provided in an exhaust pipe, and a magnesium alloy is disposed below the heat exchanger in the exhaust pipe.