JPS60142155A - Combustion device - Google Patents

Abstract

PURPOSE:To permit to release ignition pressure and prevent indoor contamination, smell or the like by providing an explosion-proof valve in a bypass path between a primary heat exchanger and an exhaust path. CONSTITUTION:In the combustion device for FF type kerosene hot air room heating machine or the like, a bypass pipe 9 is provided between an exhaust collecting part 6 and the combustion chamber 2 of the primary heat exchanger 3 and a pressure buffer valve 10 is provided in the bypass pipe 9. In this constitution, when igniting combustion is started by a burner unit 1, the pressure buffer valve 10 is opened by a sudden pressure increase upon igniting to release the pressure into an exhaust pipe 7. Thereafter, when the combustion is stabilized, the pressure buffer valve 10 closes the bypass pipe 9 by the gravity thereof. Accordingly, the pressure increase upon igniting may be reduced and generation of igniting sound, pulsating combustion or the like may be eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a combustion device such as an FF type oil hot air fan.

Structure of the conventional example and its problems As shown in FIG. 1, the combustion device of the conventional hot-air heater combines a burner unit 1 with a primary heat exchanger 3 forming a combustion chamber 2, and a smoke guide 4 connected to the burner unit 1. The secondary heat exchanger 5, the exhaust gas collection part 6 and the exhaust pipe 7 are connected through the -fire heat exchanger 3 or the smoke guide 4 part is provided with an explosion-proof valve 8 to release sudden ignition pressure. .

Therefore, according to this configuration, the explosion-proof valve 8 opens due to a sudden pressure increase at the time of ignition and prevents the pressure increase, but the problem is that exhaust gas leaks to the outside of the equipment (for example, a hot air heater), causing indoor pollution and odor. was there.

Those without a large explosion-proof film 1''8 cannot prevent a pressure rise at the time of ignition, which causes problems such as vibration combustion and ignition noise.

OBJECTS OF THE INVENTION The present invention was made in view of the above-mentioned problems, and an object of the present invention is to release ignition pressure and prevent indoor pollution, odor, etc.

Structure of the Invention In order to achieve the above object, the present invention provides a bypass passage between the primary heat exchanger and the exhaust passage, and an explosion-proof valve is provided in the bypass passage.

DESCRIPTION OF EMBODIMENTS One embodiment will be described below using FIG. 2. Parts that are the same as those of the conventional example will be referred to by the same numbers, and the explanation will be omitted. Only the different parts will be explained. A bypass pipe 9 is provided between the combustion chamber 2 of the combustion chamber 3, and this bypass pipe 9
A pressure buffer valve 10 is provided inside.

When ignition combustion is started by the burner unit 1 in the above (+14 configuration), the pressure relief valve 10 is pushed open due to the sudden pressure rise at the time of ignition, and the pressure is released to the exhaust pipe 7.Afterwards, when stable combustion begins, the pressure buffer The valve 10 closes the bypass pipe 9 by its own weight.

Therefore, the pressure load at the time of ignition is small and there is no ignition noise, vibrational combustion, etc.

FIG. 3 shows another embodiment, in which an opening/closing valve is provided in the bypass pipe 9, and the opening/closing valve is attached to one of the shafts 14 of the relenoid 13 via a nubring 12, and The capacity of 14 is attached to an air damper 16 provided in the air supply pipe 15 of the burner unit 1, and both are operated in conjunction with each other by a solenoid 130.

And this solenoid 13 is set to "strong" combustion air supply pipe 15.
Fully open the air damper 16 inside the bypass pipe 9 and open/close the air damper 16 inside the bypass pipe 9.
11 is closed, and air damper 1 is closed during "weak" combustion.
6 is closed, a weak flow of air is supplied from the small hole 16a of the damper 16, and the on-off valve 11 in the bypass pipe 9 is opened to allow exhaust gas to flow through the bypass pipe 9 directly to the exhaust pipe 7.

Therefore, in this embodiment, during "strong" combustion, the sudden pressure rise at the time of ignition pushes up the spring 12 and the on-off valve 11 opens instantaneously to release pressure, producing the same effect as the first embodiment. During "weak" combustion, part of the exhaust gas is flowed directly into the exhaust pipe 7, which increases the exhaust temperature. This phenomenon can be prevented.

Effects of the Invention As described above, the present invention has a simple structure that can prevent vibration combustion and ignition noise during ignition, as well as indoor pollution and odor, and furthermore, as explained in the embodiment, it is possible to prevent If the passage is also opened and closed, dew condensation on the exhaust extension pipe can be prevented.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing a conventional combustion device, Fig. 2 is a sectional view of a combustion device according to an embodiment of the present invention, Fig. 3 is a sectional view showing another embodiment of the present invention, and Fig. 4 is a sectional view of the same solenoid. FIG. 2... Combustion chamber, 3...-Fire heat exchanger, 5
. . . Secondary heat exchanger, 6 . . . Exhaust collecting section, 9 . . . Bypass pipe, 10. Ii...
Valve, 12... Spring, 16... Damper. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2

Claims (3)

[Claims] (1) The primary heat exchanger that forms the combustion chamber and the grip connected to it: the joint part, and the above - fire heat exchange t;)
A combustion apparatus characterized in that a bypass passage is provided between the exhaust gas collecting section and the exhaust gas collection part, and the bypass passage is provided with a valve 1 that is normally closed and opened when the pressure in the primary heat exchanger suddenly increases. (2) The combustion apparatus according to claim KS, wherein the valve is connected to a solenoid that operates during hard twist firing and is always biased in the direction of closing via a spring. (3) The solenoid is configured to drive a damper that opens and closes the air supply path to the combustion chamber.
Combustion device as described in section.