JPS581Y2 - Gas infrared vacuum combustion device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a gas infrared vacuum combustion device that is applied to heating living spaces, for example.

Conventional heating methods for living spaces include, for example, methods that directly heat the air in a living space with an open flame, methods that heat the air using a medium such as water or steam, and methods that heat the air using a medium such as water or steam. Methods such as heating the air by changing to infrared rays, which have longer wavelengths, are being implemented.

Also, among the infrared ray methods mentioned above, there is one that uses a vacuum combustion method, and since this method burns the combustion gas in a combustion tube, it is less safe and thermally efficient than other infrared ray methods and the above-mentioned methods. It is a well-known fact that it is superior in these respects.

However, in the conventional vacuum combustion apparatus, as illustrated in FIGS. 1 and 2, a combustion chamber 2 in which a gas infrared burner 1 is housed is connected by a heating pipe 3. Blower 4 connected to one end of
The structure was such that the air intake was kept in a ventilated state by the blower 4, and the exhaust gas was exhausted to the outside by the blower 4.

For this reason, it is necessary to maintain a reduced pressure inside the heating pipe 3.
Therefore, a blower with a considerably large displacement must be used, and as a result, the temperature of the exhaust gas must become high, resulting in the drawback that the heat cannot be used effectively for space heating.

Therefore, as a result of studies in view of the above-mentioned drawbacks of the conventional technology, the present invention was developed to recover the heat of the exhaust gas by reducing a part of the exhaust gas to a heating pipe, and also to provide a heat recovery pipe installed to reduce the exhaust gas. The purpose of this is to increase thermal efficiency by using the heat obtained from this as a heating heat source.

To explain this in detail with regard to the illustrated embodiment, in FIG. 3, 11.11' is a combustion chamber which is equipped with a gas infrared burner, similar to the conventional example shown in FIG. The pressure of the gas is reduced to around normal pressure by a pressure reducing valve (not shown) and the gas is sent to the burner.

Reference numeral 12 denotes a heating pipe made of a steel pipe or the like, to which the combustion chambers 11 and 11' are connected at appropriate intervals.

13 is a blower connected to the tip of the heating pipe 12.
The heating pipe 12 is provided to suck combustion gas and maintain the interior of the heating pipe 12 in an intake ventilation state (negative pressure state).

In such a configuration, according to the present invention, the exhaust gas discharge port 14 of the blower 13 and the base end of the heating pipe 12 are connected by a heat recovery pipe 15 made of a steel pipe or the like to form the duct 16. The duct 16 is provided to return the exhaust gas to the heating pipe 12.

A part of the duct 16 is provided with an outlet 17 for discharging condensed water and exhaust gas generated when the exhaust gas passes through the duct 16, and a secondary air inlet 18.
As described above, the damper 19 is arranged and provided so that a part of the exhaust gas can be returned to the heating pipe 12 side.

For more details, see section A in Fig. 3, that is, heating pipe 1.
At the base end of 2, there is a "JIM" whose inside becomes the secondary air inlet 18.
A damper 19 for air collision is provided between the hole-shaped portion 20 and the base end of the pipe 12, leaving an exhaust gas passage 21. The discharge end 15' of No. 15 is inserted into the secondary air inlet 18 at a distance facing the damper 19, and the heat recovery pipe 15 is further provided with a discharge port 17 at a position in front of the end 15'. is placed facing downward.

In addition, as shown in FIG. 5, a damper 19 is provided in the B section of FIG. 1
7 and a secondary air inlet 18 are provided.

In this case, the damper 19 is installed vertically from the upper wall of the heat recovery pipe 15 in the figure, forming an exhaust gas passage 21 between the lower edge of the damper 19 and the lower wall of the heat recovery pipe 15, Further, the exhaust port 17 is provided as a downward opening in the lower wall of the heat recovery pipe 15, and the secondary air inlet port 18 is provided to remove the heat at the rear side of the damper 19, which is made into a negative pressure by the exhaust gas passing through the exhaust gas passage 21. An upward opening is provided on the upper wall of the recovery pipe 15 to conveniently introduce secondary air into the duct 16.

In addition, in FIG. 3, 22.23 indicates the heat recovery pipe 15.
shows flexible hoses connected to the blower 13 and the base end of the heating pipe 12, respectively.

When using the above configuration to heat a living space, for example, the heating pipe 12 is installed at an appropriate height above the space, and the heat recovery pipe 15 is placed along a wall near the floor. At the same time, a reflection plate (not shown) is placed on the upper side of the heating pipe 12.

When used in this arrangement, the combustion chamber 11
．． When primary air is supplied at the same time as combustion gas is supplied into the interior of the heating pipe 11' with the pressure reduced to around normal pressure, the pressure difference in the heating pipe 12 is created by the blower 13, so air and air are supplied to the gas burner. The mixed gas is sent in as a mixed gas, and when ignited, it is burned in the combustion chamber 11 by a gas burner.

The combustion gas combusted in the combustion chamber 11 in this way heats the combustion chamber 11, 11' and is sucked by the blower 13, so it moves in the direction of the arrow in the heating pipe 12 and heats up. The pipe 12 is heated to perform heat exchange with indoor air.

At this time, infrared rays are emitted by the radiant paint applied to the heating pipe 12, and the infrared rays are reflected downward by the reflector to heat the inside of the living space.

Furthermore, since the inside of the heating pipe 12 is maintained at a negative pressure by the blower 13, no combustion gas leaks into the space.

In addition, the exhaust gas discharged from the discharge port 14 of the blower 13 is exhausted into the duct 16, but since the exhaust gas is still at a considerably high temperature, it heats the heat recovery pipe 15, and the heat generated thereby causes the Heat exchange occurs with the air in the space.

Most of the exhaust gas that is thus sent while heating the heat recovery pipe 15 is eventually exhausted to the outside from the exhaust port 17.

Further, condensed water cooled by the exhaust gas passing through the duct 16 is also discharged to the outside from the discharge port 17.

A portion of the exhaust gas controlled to an appropriate amount by the damper 19 is returned to the heating pipe 12 side and mixed with the secondary air taken in from the secondary air inlet 18.

Also, since this exhaust gas is sufficiently hot, the combustion chamber 11. The heat is recovered by being reduced to hot air against the heating pipe 12.

Next, the radiation temperatures of the present invention and the conventional example will be compared.

Combustion chamber 15,000Kcal hx 2 units Heating Heating pipe 5 ()PB 21/2B 18m Vacuum pressure 50 wm Ag Under the same conditions above, in the conventional example, heating pipe height 3
The radiation temperature at the 0crn point was 28°C, and in the present invention, the radiation temperature at the 30cm point of the heating pipe was 32°C.

A globe thermometer was used for all temperature measurements.

As explained above, the present invention connects a combustion chamber with a burner inside to the longitudinal middle of the heating pipe, which has one end as the base end for intake and the other end as the tip for exhaust. In a gas infrared vacuum combustion device in which a blower for negative pressure is connected to the distal end side of the heating pipe, the heating pipe has a protruding helical part at the base end, which is larger than the diameter of the vibro. In addition to forming a secondary air inlet, a damper for air collision is provided between the rMl) 1-shaped part and the base end of the heating pipe through which an exhaust gas passage is smaller than the diameter of the vibro. The intake side end of the heat recovery pipe is connected to the heat recovery pipe, and the discharge side end of the heat recovery pipe is inserted into the secondary air inlet on the base end side of the heating pipe, separated from the base end of the heating pipe. Therefore, not only can the combustion chamber 11.11' connected to the heating pipe 12 heat the pipe, and the generated infrared rays can heat the room, but also the heat recovery pipe 15 can be heated using the still high temperature exhaust gas. It can be heated and used for space heating, thereby increasing heating efficiency.

In addition, in this invention, exhaust gas is reduced to I! When 1lilJII) is blown into the shaped air inlet 18, a vortex of the exhaust gas to be introduced is generated due to the IIJ flat shape and the damper collision action, whereby the exhaust gas is well mixed with fresh air, and the damper Moisture in the exhaust gas is also removed by the dehumidifying effect of No. 19, and this mixed air is supplied in a predetermined direction. Incomplete combustion due to lack of oxygen when using only (low oxygen concentration) as the secondary combustion air is eliminated, and a dehumidifying effect is also added, so sending this mixed air to the combustion chamber 11 improves the combustion state of the burner. can be held,
As a result, the radiation temperature from the heating pipe 12 can be sufficiently increased, and efficient heating can be achieved.

[Brief explanation of the drawing]

Figures 1 and 2 show a conventional example of a gas infrared vacuum combustion device. Figure 1 is an overall view, Figure 2 is an enlarged view of its combustion chamber, and Figure 3 is a gas infrared vacuum combustion device according to the present invention. A front view of the entire vacuum combustion device, and FIGS. 4 and 5 are enlarged longitudinal cross-sectional views showing modifications of the main parts of the device, respectively. 11.11'... Combustion chamber, 12...
...Heating pipe, 13...Blower-114.
...Blower discharge port, 15 ... Heat recovery pipe, 16 ... Duct, 17 ... Discharge port, 18 ... Secondary Air intake port, 19...
・・Damper, 20 ・・・・・Sexy part, 21...
...Exhaust gas passage.

Claims (1)

[Scope of utility model registration request] One end is the base end for intake, and the other end is the tip for exhaust, and a combustion chamber with a banana inside is connected to the middle in the longitudinal direction of the heating pipe, and the tip side of the heating pipe In the gas infrared vacuum combustion device, which is formed by connecting a blower for negative pressure to the pipe, a IIJ let-shaped part is protruded from the base end of the heating pipe, and the secondary air is larger than the diameter of the pipe. In addition to forming an inlet, a damper for air collision is provided between the IJIJ9 shaped part and the base end of the heating pipe, leaving an exhaust gas passage smaller than the diameter of the vibro. The infrared rays are connected to the suction side ends of the recovery pipes and eve, and the discharge side end of the heat recovery pipe is inserted into the secondary air inlet on the base end side of the heating pipe, separated from the base end of the heating pipe. Vacuum combustion equipment.