JPS61252426A - Heating air blower - Google Patents

Abstract

PURPOSE:To utilize the waste heat of internal combustion engines for blowing and heating air by providing a cooling air blower for internal combustion engines and a duct having a heat exchanger for heat radiation in its air path. CONSTITUTION:When cooling air of air-cooled engine 10, sucked from an air inlet 7 by an air blower 8 for cooling, is sent into a duct 9, the air passes through a heat exchanger 12 for heat radiation for the engine 10 in the air path and its temperature is raised. The air is further mixed with exhaust gas directed into the downwind side of the heat exchanger 12 through an exhaust tube 11, and the preheated air is passed through a combuster 2 to become high- temperature combustion gas which is in turn sent into the combustion cylinder 4 of a heat exchanger 3. In this way, the heat of the engine can be effectively utilized for preheating the air of the combuster. A bypath duct and a valve are provided, by which the amount of air passing through the heat exchanger for heat radiation is controlled. The power of the engine is preferably taken out by a power takeout device.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a heating blower device, and particularly relates to a forced blower device for a burner used in a heating device such as a boiler or a heater. Forced air blowers used in heating devices generally include a combination of a blower fan and an electric motor.

Problems to be Solved by the Invention The forced air blower of the prior art described above naturally requires electricity, and in places where there are no power lines or where it is not easy to connect power lines, separate power generation equipment is required, and the installation of boilers and heaters is required. In addition, even if power lines were available, countermeasures against power outages were required, and there were cases in which power supply capacity was exceeded when expanding the power line.

Means and Effects for Solving the Problems The present invention improves the inconveniences of the above-mentioned prior art and provides a heating and blowing device that does not require the use of electric power and has high fuel efficiency. The internal combustion engine cooling air is driven by an internal combustion engine cooling air blower, and the internal combustion engine heat radiation heat exchanger is composed of a duct placed in the air path to heat the blown air. duct), passes through the internal combustion engine heat exchanger, where it receives heat, and also receives waste heat from the exhaust gas, increasing the air temperature before being sent out to the duct outlet side. .

Both water-cooled engines and air-cooled engines can be used as internal combustion engines, but especially when an air-cooled engine is used, the engine itself is equipped with a blower fan, so there is no need for a separate blower device, and the generated air can be used. The cost of heating blower equipment is low, the structure is simple, it is suitable for mass production, and the waste heat of internal combustion engines can be used for blow heating.
It is superior to water-cooled engines because fuel energy can be used more effectively.

Embodiments The present invention will be explained based on the drawings. In FIG. 1, a heating blower device 1 uses an air-cooled engine 10 as an internal combustion engine.
is supported on a common frame 6 in combination with a fuel combustion device 2 and a heat exchange device 3. The fuel for the internal combustion engine 10 is fed from the fuel port 17, and the fuel for the combustion device 2 is fed from the fuel inlet 1.
Sent from 8.

A combustion device 2 is provided on the duct outlet side 5 of the heating blower device 1, and the high-temperature gas is attached to the combustion tube 4 of the heat exchange device 3. The cooling air 10 is sent into a duct 9 forming an air path, and as shown in FIG.
The temperature increases due to heat radiation.

Further, the blown air mixed with the exhaust gas introduced through the engine exhaust pipe 11 to the leeward side of the engine radiation heat exchange section 12 and preheated is passed through the combustion device 2 and converted into high-temperature combustion gas into the combustion tube 4 of the heat exchange device 3. It is designed to be sent to

In this way, the heat radiated from the engine can be effectively used to preheat the air of the combustion device used in the heat exchange device.

Further, as the case may be, an exhaust gas heat exchanger 13 may be provided as shown in FIG. 3 to increase the temperature of the engine exhaust gas by indirectly exchanging heat with the blown air using the waste heat of the exhaust gas.

Furthermore, as shown in FIG. 4, a bypass duct 14 and a valve 16 are provided in the ducts constituting the air passage, so that the amount of air blown that passes through the heat radiation heat exchange section of the engine can be controlled. It is also possible to bring it into optimal condition.

Further, FIG. 5 shows a case where the air is blown in the layout shown in FIG. 2, whereas the air is blown in a suction direction.

Note that the power of the engine can be extracted from the power extraction device 15.

Effects of the Invention Since the present invention is constructed as described in detail below, conventionally it was impossible to operate a boiler or heater with a forced air burner without power supply, but the present invention It can be operated without power line facilities. Therefore, it is particularly useful for use in heated greenhouses on farms, fish farms, construction sites, etc. where there is no electricity.

Furthermore, as mentioned above, when the engine is air-cooled, the engine's cooling blower is used as a forced air blower for combustion, so the power from the engine's output shaft can be used directly as power. If a generator is installed, it is possible to supply electricity that can be used for auxiliary power of a heat exchanger, etc., or it is also possible to directly drive a water pump, etc., and there is no need to draw electricity into the place where the boiler or heater is used. 0 Furthermore, compared to the forced air system using a normal electric fan, the air supplied to the combustion device is preheated, so it helps atomize low-quality liquid fuel and achieves better combustion. Instead, when engine exhaust gas is mixed into the intake air, it has the effect of suppressing the generation of NOx, which is a combustion product. Furthermore, since the exhaust flow of the engine is an intermittent pulsating flow, the formation of a thermal boundary film in the heat exchange device of the boiler or heater is prevented, resulting in the effect of improving heat transfer efficiency.

[Brief explanation of the drawing]

Fig. 1 shows a partial sectional view of an embodiment in which the present heating blower device is combined with a combustion device and a heat exchange device, Fig. 2 is a partial schematic view showing a radiation heat exchange section provided in the air path, and Fig. 3 Figure 4 is a partial schematic diagram of an exhaust gas heat exchanger installed, Figure 4 is a partial schematic diagram of a bypass provided in the duct of the radiation heat exchange section, and Figure 5 is the air passage shown in Figure 2, which pushes the air flow. 01 is a heating blower device, 2 is a partial schematic diagram showing a case where the method is changed to a suction method.
is a combustion device, 3 is a heat exchange device, 8 is a cooling type blower, 9 is a duct, 10 is an internal combustion engine, 11 is an exhaust pipe, 12 is a radiation heat exchange section, 13 is an exhaust gas heat exchanger, 14 is a bypass duct, 15 is a power take-off device. Patent Applicant: Toyo Machinery Co., Ltd. Drawing No. 11: 20 years ago, 3 times, 41i, $51'fi, Procedural Amendment, November 8, 1985

Claims (1)

[Scope of Claims] 1. Blowing air consisting of an internal combustion engine, a cooling blower for the internal combustion engine driven by its power, and a duct connected to the blower and placing a radiation heat exchange section of the internal combustion engine in the air path. A heating blower that heats the air. 2. The heating air blower according to item 1, wherein the exhaust gas of the internal combustion engine is introduced to the leeward side of the radiation heat exchange section through an exhaust pipe to heat the blown air. 3. The heating blower device according to the above items 1 and 2, in which internal combustion engine exhaust gas is heated as blown air through an exhaust gas heat exchanger. 4. A part of the air blown from the cooling blower of the internal combustion engine,
4. The heating blower device according to any one of the above items 1 to 3, which bypasses the radiation heat exchange section of the internal combustion engine. 5. The first fuel combustion device provided with a fuel combustion device on the duct outlet side
The heating and blowing device according to items 1 to 4. 6. The heating air blower according to any one of the above items 1 to 5, which is provided with a power extraction device from an internal combustion engine. 7. The heating and blowing device according to item 5, which includes the heating and blowing device and a heat exchange device that uses high-temperature gas discharged from the blowing device.