JP2007078257A - Combustion device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a combustion device for a steam convection oven with improved thermal efficiency by structuring it so that heat from combustion of a burner does not escape to the outside of an oven box. <P>SOLUTION: The combustion device 11 is equipped with a solenoid valve 12 connected to piping 21 of a gas 20, a control box 13 for transmitting a working signal to the solenoid valve 12, a mixing pipe 15 to which the gas 20 decompressed to a non-pressure state by a decompression device 14 in the solenoid valve 12 is fed out and for mixing the gas 20 and air 31, a fan 16 for sucking the gas 20 in the solenoid valve 12 into the mixing pipe 15, a burner 17 for combusting the gas 20 fed out from the mixing pipe 15, an ignition spark rod 18 provided near the burner 17, and a heat exchanger 19 in which air heated by the burner 17 flows and which is installed in the oven box 34. The burner 17 as the combustion device 11 is provided inside the heat exchanger 19. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a combustion apparatus provided in, for example, a steam convection oven.

  Conventionally, what is shown in FIG. 4 is known as an installation state of a heat exchange pipe and a burner in a combustion apparatus of a steam convection oven. That is, a fan 3 for circulating air is provided in the interior 2 of the steam convection oven 1, and a plurality of heat exchange pipes 4 curved to surround the fan 3 are installed. Yes. The upper part of the heat exchange pipe 4 communicates with the exhaust duct 5, and the lower part communicates with the combustion chamber 6 outside the warehouse. The combustion chamber 6 is provided with a burner 7 (see Patent Document 1).

The air in the combustion chamber 6 heated by the combustion of the burner 7 passes through the heat exchange pipe 4, exchanges heat in the intermediate chamber 2, and is further discharged from the exhaust duct 5 to the outside. The hot air heat-exchanged in the inside 2 is circulated in the inside 2 by the fan 3.
JP 2004-12079 A (FIGS. 1 and 2).

  When the heat exchanger pipe 4 and the burner 7 are installed in the conventional combustion apparatus, since the burner 7 is provided in the combustion chamber 6 outside the warehouse, the heat escapes to the outside and the heat efficiency is deteriorated. have.

  Therefore, in the case of the conventional example, there is a problem that must be solved by improving the thermal efficiency by preventing the heat generated by the combustion of the burner 7 from escaping to the outside.

  As a specific means for solving the problems of the conventional example, the present invention reduces the pressure by a solenoid valve connected to a gas pipe, a control box for sending an operation signal to the solenoid valve, and a decompressor in the solenoid valve. A mixing pipe that mixes the gas and air, and a fan that sucks the gas that has passed through the solenoid valve into the mixing pipe; and a burner that burns the gas sent from the mixing pipe; An ignition spark rod provided in the vicinity of the burner, and at least a heat exchanger in which air heated by the burner circulates and installed in a warehouse such as an oven, the burner includes the heat exchange The present invention provides a combustion apparatus that is provided inside a vessel.

The mixing pipe is provided with a gas amount adjusting screw;
A gas amount adjusting screw or orifice for adjusting the amount of gas delivered is provided between the solenoid valve and the mixing pipe;
Is included.

  The combustion apparatus according to the present invention is a solenoid valve to which a gas pipe is connected, a control box for sending an operation signal to the solenoid valve, a gas decompressed by a decompression device in the solenoid valve, and A mixing tube for mixing gas and air, a fan for sucking the gas that has passed through the solenoid valve into the mixing tube, a burner for burning the gas sent from the mixing tube, and an ignition provided in the vicinity of the burner And at least a heat exchanger installed in an oven or the like, wherein the burner is provided inside the heat exchanger. Since all the heat generated by the burner combustion is released to the inside of the heat exchanger without escaping to the outside, there is an excellent effect of improving the thermal efficiency.

  Further, the mixing tube is provided with a gas amount adjusting screw, so that an excellent effect is obtained that the amount of gas delivered to the burner can be adjusted appropriately.

  A gas amount adjusting screw or an orifice for adjusting the amount of gas to be delivered is provided between the solenoid valve and the mixing tube, so that the amount of gas delivered to the burner can be appropriately adjusted. That is, conventionally, when different gas types such as city gas or propane gas are used, a nozzle suitable for the gas type is used. However, in the present invention, the gas amount adjusting screw or orifice is used without changing the nozzle. It has an excellent effect that it can be adjusted only by itself.

  Next, embodiments of the present invention will be described with reference to the drawings. First, FIG. 1 is a schematic configuration diagram of a combustion apparatus 11 according to the present invention, FIG. 2 is a schematic configuration diagram of an electromagnetic valve 12, and FIG. 3 is a schematic configuration for explaining an installation state of a heat exchanger 18 and a burner 17. FIG.

  The combustion device 11 is supplied with a solenoid valve 12, a control box 13 that sends an operation signal (current) to the solenoid valve 12, and a gas 20 that is decompressed to a non-pressure state by a decompressor 14 in the solenoid valve 12. Mixing pipe 15, fan 16 that sucks gas 20 that has passed through electromagnetic valve 12 into mixing pipe 15, burner 17 that burns the gas sent from mixing pipe 15, and ignition spark provided in the vicinity of burner 17 It consists of a rod 18 and a heat exchanger 19 through which air heated by the burner 17 passes.

  As shown in FIGS. 1 and 2, the solenoid valve 12 is connected to a pipe 21 of a gas 20 at the lower portion, and the gas 20 applied with a predetermined pressure is sent from the pipe 21 to the solenoid valve 12. The electromagnetic valve 12 includes a plunger 22 and a coil 23 that opens or closes the plunger 22, and the coil 23 is connected to the control box 13 by a wiring 24.

  In the solenoid valve 12 having such a configuration, the plunger 22 is normally closed, and the gas 20 is blocked before the plunger 22. When an operation signal, that is, a predetermined current flows from the control box 13, the plunger 22 is opened by the principle of the electromagnet, and the gas 20 passes through the electromagnetic valve 12. Further, a predetermined pressure reducing device 14 is provided inside the electromagnetic valve 12, and the gas 20 is depressurized to a non-pressure state.

  As described above, the control box 13 opens or closes the plunger 22 of the electromagnetic valve 12, and wirings 25 and 26 are connected to the fan 16 via the base 27. Is sent out. Further, in the control box 13, the wirings 28 and 29 are connected to the spark rod 18 via the ignition device 30, and an operation signal is sent to operate the ignition device 30 to cause the spark rod 18 to emit fireworks.

  The mixing tube 15 is installed adjacent to the electromagnetic valve 12, and the non-pressure gas 20 is sent out, and a predetermined amount of air 31 is taken in from the lower portion so that the gas 20 and the air 31 are mixed at a predetermined ratio. To mix. Further, the mixing pipe 15 is provided with a gas amount adjusting screw 32, so that the amount of gas delivered to the burner 17 can be adjusted appropriately.

A gas amount adjusting screw or a ring-shaped orifice 33 for adjusting the amount of gas to be delivered is provided at a position adjacent to the mixing tube 15 and the solenoid valve 12, so that the amount of gas delivered to the burner 17 is appropriately set. Can be adjusted.
That is, conventionally when a different gas type such as city gas or propane gas is used, a nozzle suitable for the gas type is used. However, in the present invention, the gas amount adjusting screw or orifice is used without changing the nozzle. Adjustment is possible only with 33.

  The fan 16 is provided at a position adjacent to the mixing tube 15, and the gas 20 that has passed through the electromagnetic valve 12 is sucked into the mixing tube 15 and sent to the burner 17. Further, as described above, the fan 16 is activated or stopped by an activation signal from the control box 13.

  As shown in FIG. 3, the burner 17 is provided so as to protrude into the interior 34 of an oven or the like, and at least the tip end portion 17 a of the burner 17 is disposed inside the heat exchanger 19. Accordingly, the burner 17 is configured to burn inside the heat exchanger 19.

  An ignition spark rod 18 is provided in the vicinity of the burner 17. Further, as described above, when the operation signal is sent from the control box 13 to the ignition device 30, the spark rod 18 emits a spark and ignites the burner 17.

  As shown in FIG. 3, the heat exchanger 19 is installed in an interior 34 of an oven or the like, is formed in a pipe shape, and is bent or curved so as to surround the interior fan 35. . Further, one end portion 19 a of the heat exchanger 19 is closed in the vicinity of the burner 17, and the other end portion 19 b communicates with the exhaust duct 36.

  Since the burner 17 is provided in the heat exchanger 19 in the combustion device 11 configured in this way, the inside of the heat exchanger 19 is configured to also serve as a combustion chamber. Accordingly, since the heat generated by the burner 17 is not released to the outside of the chamber 37 but is released to the inside of the heat exchanger 19, the thermal efficiency is improved. Further, the exhaust in the heat exchanger 19 is discharged to the outside from the exhaust duct 36.

  The combustion apparatus 11 of the present invention can be applied to not only a steam convection oven but also a convection oven or other various ovens.

It is a schematic block diagram of the combustion apparatus 11 which concerns on this invention. 1 is a schematic configuration diagram of a solenoid valve 12. FIG. It is a schematic block diagram explaining the installation state of the heat exchanger 19 and the burner 17. FIG. It is a schematic block diagram explaining the installation state of the heat exchange pipe 4 and the burner 7 which concern on a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Steam convection oven 2 Inside the chamber 3 Fan 4 Heat exchange pipe 5 Exhaust duct 6 Combustion chamber 7 Burner 11 Combustion device 12 Solenoid valve 13 Control box 14 Decompression device 15 Mixing tube 16 Fan 17 Burner 17a Tip 18 Spark rod 19 Heat exchanger 19a one end portion 19b other end portion 20 gas 21 piping 22 plunger 23 coil 24 wiring 25, 26 wiring 27 base 28, 29 wiring 30 ignition device 31 air 32 gas amount adjusting screw 33 gas amount adjusting screw or orifice 34 chamber 35 chamber Inner fan 36 Exhaust duct 37 Outside

Claims (3)

A solenoid valve to which a gas pipe is connected;
A control box for sending an actuation signal to the solenoid valve;
A gas that is depressurized by the pressure reducing device in the electromagnetic valve is sent out, and a mixing tube that mixes the gas and air;
A fan that sucks the gas that has passed through the solenoid valve into the mixing tube;
A burner for burning the gas delivered from the mixing tube;
A spark rod for ignition provided in the vicinity of the burner;
The air heated by the burner circulates, and includes at least a heat exchanger installed in an oven or the like,
The combustion apparatus, wherein the burner is provided inside the heat exchanger.   The combustion apparatus according to claim 1, wherein the mixing pipe is provided with a gas amount adjusting screw.   The combustion apparatus according to claim 1, wherein a gas amount adjusting screw or an orifice for adjusting a gas amount to be delivered is provided between the electromagnetic valve and the mixing pipe.

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