JPH0355426A - Burner - Google Patents

Abstract

PURPOSE:To make it possible to fix simply a wiring member without influencing the conditions of combustion by supporting the wiring member without closing its opening by a coil member which is engaged at an engagement section for support which is provided to an air dispersion member separately from the opening. CONSTITUTION:A lead wire 27 is supported by a coil spring 29 which encircles the lead wire 27 so as not to close an opening 28a, and it is fixed to an air dispersion plate 28 with the coil spring 29. And, one of the hook sections 29a on both ends of the coil spring 29 is inserted into one of two hanging holes 28a which are provided separately from the hole 28a and it is hung on it so as not to close the hole 28a of the air dispersion plate 28. After the coil spring 29 has been stretched adequately, the other hook section 29a is hung likewise on the hanging hole 28b. As the result of this arrangement the lead wire 27 is fixed securely to the air dispersion plate 28 by the spring force of the coil spring 29 so that the lead wire 27 never fluctuates by the actuation of a blower 15.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention relates to a combustion device that supplies combustion air to a burner using a blower, and in which the combustion air is evenly supplied to the burner in a combustion air supply path. This invention relates to a combustion device that is provided with an air dispersion member for igniting a burner or for detecting ignition, a sparker ignition electrode for detecting ignition of a burner, and wiring for transmitting a detection signal from a detection means such as a flame rod. [Conventional technology] For example, in a gas water heater, combustion air is supplied to the burner by a blower, and in this case, an air distribution plate with multiple openings is used to supply combustion air to the burner evenly. Some are placed in the air passage to equalize the pressure of combustion air to the burner.

On the other hand, in order to detect ignition of the burner, some are equipped with a flame rod or thermocouple ignition detection means near the burner nozzle. [Problem to be solved by the invention] These gas water heaters tend to be smaller than before, and in recent years, due to housing conditions, there has been a demand for even smaller and higher performance devices. For this reason, the external dimensions of the water heater itself are limited, the burner, blower, etc. housed inside are also housed in a limited space, and the wiring from the ignition detection means to the control circuit is also limited. It must fit within the space provided. For this reason, it is conceivable to run the wiring inside the scroll casing of the blower that supplies the combustion air, but when the blower sends the combustion air to the burner, the pressure of the combustion air is applied to the wiring member. At this time, Kai! If one member is unstable, the wiring member will be pushed downstream, and as a result, if the wiring member blocks the opening formed in the air distribution plate, it will not be possible to equalize the combustion air. Depending on the type of fuel, there is a problem that combustion may occur easily. An object of the present invention is to easily fix the wiring member without affecting the combustion state in a combustion device in which the wiring member from the burner passes through a passage for combustion air generated by a blower. do. [Means for Solving the Problems] The present invention includes a blower for supplying combustion air to burners, and for uniformly supplying combustion air corresponding to the burners into a combustion air supply path by the blower. an air dispersion member having a plurality of openings formed therein, and a wiring member connected to an ignition means or ignition detection means for detecting ignition or ignition of the burner passing through the supply path. In the combustion device, the wiring member is supported without blocking the opening by a coil member that is locked to a support locking part provided in the air dispersion member separately from the opening. do. [ff! In the present invention, when the wiring member is entwined with the coil member and both ends of the coil member are locked in the support locking portions, the wiring member is fixed to the air dispersion member.

At this time, since the wiring member does not block the opening of the air distribution member, combustion air is evenly supplied to the burner. [Effects of the Invention] Since the present invention uses a coil member, the wiring member can be easily fixed. Further, in this case, the combustion state is not affected because the wiring member does not block the opening by simply providing the locking portion for supporting the coil member so as to avoid the opening. [Example] Next, the present invention will be explained based on an example. FIG. 1 shows a gas water heater 1. As shown in FIG. 10 and an electrical component casing 30 containing a control device. The combustor 10 has a large number of sheet metal burners 12 arranged in a row within a metal combustor casing 11 that forms a combustion chamber, and a scroll casing 13 below to supply combustion air into the combustion chamber. An impeller (not shown) is provided inside the air blower 15, and a motor 14 rotates the impeller.

Gas pipe connection port 2 provided at the bottom of the water heater casing 2
In order to supply fuel gas from a gas pipe (not shown) connected to the gas pipe 21 and to use the sheet metal burners 12 divided into two groups at the middle, these sheet metal burners 12 are provided with two gas pipes from the combustion pipe 21. Two nozzle pipes 22 and 23 are provided which are branched into two nozzle pipes 22 and 23. On one side of the nozzle pipe, there is a not-shown 1! for controlling fuel supply. Further, upstream of the two nozzle pipes 22 and 23, the magnetic valve includes a governor proportional valve that adjusts the fuel supply, and a valve a that is an integral combination of a main solenoid valve and a main solenoid valve.
A horizontal group 24 is provided to adjust the amount of fuel supplied depending on the amount of heating required.

A combustor 10 in which sheet metal burners 12 are arranged is provided with a spark electrode 25 for ignition on one side, and a flame rod 26 for detecting ignition on the other side.

As shown in FIG. 3, the flame rod 26 has a lead for connection to a flame detection circuit (not shown) provided in the control device! 127 is connected. In this embodiment, since the space inside the water heater casing 2 is limited, this lead! 27 is a ventilation tll as shown in No. 3121
Air supply box 11 is a passage for combustion air supplied from 15.
a, and is connected to the electrical component casing 30 by passing through the air supply box 11a. Here, since the air supply box 11a is also provided within a limited space inside the water heater casing 2, the air supply box 11a has an air distribution system for uniformly supplying combustion air to each sheet metal burner 12. A board 28 is arranged. The air distribution plate 28 has a large number of holes 2 as shown in FIG.
The hole 28a of the air dispersion plate 28 is
On the side closer to the air outlet 15a of ll5, that is, on the left side in FIG. 4, the number of holes 28a is relatively small.
are quite dispersed, but on the right side in the figure, which is the side far from the blower outlet, a large number of holes 28a are provided densely. Similarly to the left side, evenly distributed combustion air is supplied. In this way, in the air supply i11a, the holes 28a are arranged so that combustion air is uniformly supplied to each sheet metal burner 12.
Since the distribution of air is calculated, if one of the holes becomes clogged or blocked, the balance of combustion air will be disrupted. Therefore, in order to prevent the lead wire 27 from blocking the hole 28a, the lead wire 27 is supported by being wrapped around a coil spring 29, and is fixed to the air distribution plate 28 together with the coil spring 29. Here, hook portions 29a at both ends of the coil spring 29 are attached to one of two hook holes 28b provided separately from the hole 28a at a position where the hole 28a of the air distribution plate 28 is not blocked.
After one of the hooks is inserted and hooked, and the coil spring 29 is properly tensioned, the other hook portion 29a is similarly hooked into the hook hole 28b.

As a result, the lead wire 27 is firmly fixed to the air distribution plate 28 by the elastic force of the coil spring 29, and the feed J! 115, so that the main power wire 27 does not wobble. Above the combustor 10 inside the combustion chamber, a heat exchanger 3 consisting of water tubes with a large number of fins is disposed inside the combustion chamber, and furthermore, at the top of the combustor casing 11, there is an exhaust gas for discharging combustion exhaust gas. A mouth 4 is provided. The water pipe 3a is disposed upward from the water supply port 5 provided below the water heater casing 2, is fixed to the outside of the combustor casing l1 so as to surround the combustor casing 11, and is fixed to the outside of the combustor casing l1. It penetrates into the combustor casing 11 from the upper part of the combustor casing 11, is arranged to reciprocate inside the combustion chamber while being bent several times, and is again exposed outside the combustor casing 11 from the middle part of the combustor casing 11.
The hot water pipe is led to the hot water pipe connection port 6 located at the bottom of the water heater casing 2. As described above, the combustor casing 1 including the air blower 8l15
1. The fuel supply system, such as the fuel pipe 21, and the waterway system, such as the water pipe 3a, occupy most of the inside of the water heater casing 2, and the electrical component casing 30, which houses the control device, is located in a small area on the lower right side of the figure. It is placed within the space given by the width.

As shown in FIG. 5, the electrical component casing 30 includes a casing main body 31 and a lid portion 40 shaped using resin.
It has a thin box-like shape, and the inside contains electrical components that make up a control circuit centered on a microcomputer.

A part of the control circuit includes a flame detection circuit for detecting flame by the lead wire 27 of the frame rod 26, and the casing body 31 and the lid part 40 are connected to electrical components and a control device inside. After the wiring members are housed, they are fitted together via packing to form an electrical component casing 30, which is then housed in the water heater casing 2 as shown in FIG. In the gas water heater 1 in which the control device is housed in the electrical component casing 30, the combustor casing 1
1 and the electrical component casing 30 with a space between them, so even if the combustor casing 11 is heated by the combustion heat of the combustor 10, the heat is transferred to the electrical component casing. Does not affect 30. In addition, even in the event that combustion gas leaks from the combustor casing 11, the leaked combustion gas is blocked by the heat shield plate 50, so the electrical component casing 30 deforms, causing the combustion gas to leak into the internal electrical components. has no influence.

In the above embodiment, when the air blower all 5 is operated and combustion air is supplied from the air outlet 15a into the air supply box 11a, the combustion air is dispersed at a speed by the air dispersion plate 28 to each plate burner 12. are evenly supplied.

At this time, the lead wire 27 that transmits the signal from the frame rod 26 into the electrical component casing 30 is connected to the coil spring 29.
Since it is firmly fixed to the air distribution plate 28 by the combustion air, its position will not change due to the combustion air, and the holes 28a'G:''4 of the air distribution plate 28 will not close. Therefore, each sheet metal burner 12 The state of supply of combustion air to the
The work is simple because it is only necessary to wrap the coil spring 29 around the coil spring 29 and then hook the coil spring 29 into the hook hole 28b.

In the first embodiment described above, a gas water heater is shown, but water heaters using other fuels such as oil can also produce similar effects. Note that the present invention can also be applied to those in which the flame rod has an ignition function.

[Brief explanation of drawings]

FIG. 1 is a front view showing the inside of a gas water heater according to this embodiment, and FIG. 2 is a side view showing the inside of the gas water heater according to this embodiment.
Fig. 3 is a sectional view showing the inside of the combustor casing of the gas water heater of this embodiment, Fig. 4 is a schematic diagram showing the state in which the lead wire is fixed to the air distribution plate of this embodiment, and Fig. 5 is this embodiment. FIG. 2 is a perspective view showing the electrical component casing and heat shield plate. In the figure, 1... gas water heater (combustion device), 10... combustor (burner), lla... air supply box (combustion air supply path), 15... blower, 26...・Frame rod (ignition detection means), 27... Lead wire (wiring member),
28...Air dispersion plate (air dispersion member), 28a...
Hole (?!i number of openings), 28b...Hook hole (supporting locking part), 29...Coil spring (coil member). Agent Kenji Ishiguro

Claims (1)

[Scope of Claims] 1) A blower for supplying combustion air to the burner, and a plurality of openings in a combustion air supply path by the blower for uniformly supplying the combustion air corresponding to the burner. In a combustion device, an air dispersion member is provided, and a wiring member connected to an ignition means or an ignition detection means for detecting ignition or ignition of the burner is arranged to pass through the supply path, The combustion apparatus is characterized in that the wiring member is supported without blocking the opening by a coil member that is locked to a supporting locking portion that is provided in the air dispersion member separately from the opening.