JP3285461B2 - Combustion device and method for manufacturing nozzle holder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion apparatus in which water in a heat exchanger is heated by a burner so that hot water can be supplied.

[0002]

2. Description of the Related Art As a conventional combustion apparatus, a burner is disposed below a heat exchanger with a combustion chamber interposed therebetween.
A nozzle holder that has many nozzles for supplying gas to the burner is installed, and the nozzle diameter may vary depending on the type of gas used. Generally, a gas type and an identification mark for indicating the type of the nozzle holder corresponding to the gas type are engraved or printed.

[0003]

However, in such a conventional combustion apparatus, since the perforating process of the nozzle and the engraving of the identification mark are performed in separate steps, the nozzle according to the kind of gas to be used is required. A defective nozzle holder whose diameter does not correspond to the identification mark of the type of nozzle holder according to the gas type may be manufactured, and the defective nozzle holder may be erroneously incorporated based on the identification mark. In the inspection stage, an assembly error is detected,
There is a problem in that productivity is reduced because replacement with a non-defective product and reassembly or disposal of a defective product are discarded. The present invention has been made in view of such conventional problems, and performs the drilling of the nozzle and the drilling of the through hole for identification of the nozzle holder in the same process, for example, the same It is an object of the present invention to provide a combustion apparatus that can perform both drilling using a machining center or the like in a program, eliminate errors in identification marks, eliminate defective products, and increase productivity. .

[0004]

SUMMARY OF THE INVENTION To achieve the above object, the gist of the present invention is to: 1 Combustion in which water in a heat exchanger (20) is heated by a burner (30) so that hot water can be supplied. In the apparatus, a discriminating flange (87) is formed on a nozzle holder (80) for supplying a combustion gas to the burner (30) and having a plurality of nozzles (85, 86), In the same step as the drilling process of the nozzle (85), the identification flange (87) penetrates the identification flange (87) so that the type of the nozzle holder (80) can be identified by the detection light passing through the hole. A combustion device comprising a hole (88).

[0005] 2. The combustion apparatus according to claim 1, wherein the identification through-hole (88) is formed in the same direction as the direction in which the nozzle (85) is drilled.

(3) A combustion device in which water in a heat exchanger (20) is heated by a burner (30) so that hot water can be supplied. A nozzle holder (30) for supplying combustion gas to the burner (30). 80), the nozzle holder (8) having a large number of nozzles (85, 86).
0), an identification flange (87) is formed, and the detection light passes through the hole in the identification flange (87) during the same process as the drilling of the nozzle (85). A method for manufacturing a nozzle holder for a combustion apparatus, characterized in that a through hole (88) for identification which makes it possible to identify the type of (80) is drilled from the same direction as the drilling direction of the nozzle (85). .

[0007]

In the drilling step of drilling the nozzle (85) of the nozzle holder (80), the identification flange (87) formed in the nozzle holder (80) is inserted into the identification through hole (8).
Since the drilling process of 8) is performed simultaneously, for example, if both drilling processes are performed using a machining center or the like in the same program, the diameter of the nozzle (85) according to the type of gas used is reduced. And the identification mark of the type of the nozzle holder (80) corresponding to the gas type completely corresponds,
No defective nozzle holder (80) on the identification mark is manufactured.

In the automatic discrimination step, the detection light passes through the discrimination through hole (88) so that the gas type to be used for the nozzle holder (80) and the nozzle (8) are used.
5) If the diameter is recognized and the nozzle holder (80) is incorporated based on the identification result, the nozzle holder (80) having the diameter of the nozzle (85) suitable for the type of gas to be used is incorporated into the main body, and the defective product is removed. The nozzle holder (80) is not erroneously assembled, and no defective product is generated on the identification mark of the nozzle holder (80), so that productivity can be improved.

If the identification through-hole (88) is drilled from the same direction as the drilling direction of the nozzle (85), the nozzle (85) can be simultaneously drilled from the same direction with the same stroke using a machining center or the like. ) And the through hole for identification (88) can be drilled, and the drilling of the through hole for identification (88) does not require any special man-hour, and the direction of the nozzle holder (80) can be changed. Since there is no need, the productivity can be further improved.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 7 show one embodiment of the present invention. FIG.
As shown in FIG. 4 to FIG. 4, the combustion device according to the present embodiment is a water heater 10. The water heater 10 includes a combustion unit 12 in an appliance case 11, and the combustion unit 12 has A combustion fan 13 is mounted. In the combustion unit 12, a burner 30, a heat exchanger 20, and an exhaust
Are arranged, and a flow path of air is formed from the blowing port of the combustion fan 13 to the exhaust port 16. Combustion fan 13
The space between the blower port and the burner 30 is the air chamber 17, and the space between the burner 30 and the heat exchanger 20 is the combustion chamber 18.

A nozzle holder 80 for supplying a combustion gas is connected to the burner 30. The nozzle holder 80 includes a gas solenoid valve 60, a gas supply pipe 61, and a gas proportional valve 62.
And an external gas supply path via the original gas solenoid valve 63.

An ignition electrode 65, which is an ignition electrode, and a flame rod electrode 66 for detecting a flame are arranged near the upper surface, which is the ignition surface of the burner 30, from above. The ignition electrode 65 is the igniter 6
7 is connected.

A fin pipe 40 is provided in the heat exchanger 20, and a large number of fin plates 50 are inserted into the fin pipe 40 in the pipe axial direction. Fin pipe 40
A water supply pipe 45 is connected to a base end of the fin pipe 40, and a hot water supply path is connected to a front end of the fin pipe 40.

On the front side of the main body of the burner case 31,
The burner case cover 70 is mounted. An igniter 67 is provided on the side wall 71 of the burner case cover 70.
Is attached to the front wall 72 of the burner case cover 70.
Is equipped with an electrode unit. The electrode unit is
The base electrodes of the ignition electrode 65 and the frame rod electrode 66 are formed.

As shown in FIGS. 1 and 5 to 7, the nozzle holder 80 is integrally formed by die casting of an aluminum material, and three gas supply passages 89 are formed inside the nozzle holder 80. Have been. At the time of die casting,
A large number of nozzles 85 and 86 are not drilled, but are drilled in a later drilling process by a machining center. The nozzles 85 and 86 are formed on the upper surface 81 and the rear surface 84 of the nozzle holder 80. On the front surface 83 of the nozzle holder 80, a flange 87 for identification extending downward from the front surface 83 is formed. The identification flange 87 is visible from the front surface 83 and the rear surface 84, and has six small square identification regions.

The identification flange 87 is provided with identification through holes 88 to be appropriately drilled in the six identification areas during the same process as the drilling of the nozzle 85 by the machining center. The through hole 88 for identification is
The detection light can pass from the front surface 83 or the back surface 84 side, and a large number of gas types to be used can be identified from the number of combinations of the identification areas where the through holes 88 for identification are formed. Further, the direction of piercing of the through hole 88 for identification and the direction of piercing of the nozzle 85 are set to be the same.

Next, the operation will be described. In the drilling process of drilling the nozzle 85 of the nozzle holder 80 by the machining center, the drilling process of drilling the through hole 88 for identification on the flange 87 for identification formed on the nozzle holder 80 can be performed together. So that, for example, both drillings can be incorporated together in a program, and if both drillings are performed using such a program, the nozzle depends on the type of gas used. The 85 diameter and the identification mark of the type of the nozzle holder 80 corresponding to the gas type completely correspond, and there is no possibility that the defective nozzle holder 80 associated with the identification mark is produced.

In an automatic identification step, which is one of the steps from the production of the nozzle holder 80 to the step of assembling the nozzle holder 80, detection light is transmitted through an identification through hole 88 formed in an identification flange 87. Pass, the gas type to be used for the nozzle holder 80 and the diameter of the nozzle 85 are recognized. If the nozzle holder 80 is incorporated based on the identification result, the nozzle 85 diameter suitable for the gas type to be used can be recognized. Nozzle holder 80 is incorporated in the water heater main body, and there is no possibility that the defective nozzle holder 80 is mistakenly incorporated. As a result, the occurrence of defective products on the identification mark of the nozzle holder 80 is completely eliminated, and the replacement or disposal of defective products is eliminated, so that productivity can be improved.

Further, since the identification through-hole 88 can be drilled from the same direction as the drilling direction of the nozzle 85, for example, the nozzle 85 and the identification through-hole can be simultaneously drilled from the same direction with the same stroke using a machining center. This makes it possible to perform the drilling of the hole 88. In such a case, it is not necessary to specifically set the drilling of the through hole 88 for identification, and it is also necessary to change the direction of the nozzle holder 80 and the like. Since there is no such product, productivity can be further improved.

When water is supplied into the fin pipe 40 from the water supply channel side and the water amount sensor A senses the amount of water supply, the combustion fan 13 rotates and prepurge is started. When the air volume sensor B detects the air volume and the combustion fan 13 reaches a predetermined air volume, the combustion fan 13 is turned on, and when the prepurge time elapses, discharge is started from the ignition electrode 65, and the gas electromagnetic valve 60 and the original gas electromagnetic The valve base gas solenoid valve 63 opens, the gas proportional valve 62 opens, and the gas flows to the burner 30 via the gas supply passage 89 of the nozzle holder 80, and the burner 30 ignites.

When the burner 30 is ignited, the heat is transmitted to the fin pipe 40 via each fin plate 50,
The water in the fin pipe 40 is heated.

In the above embodiment, a flange 87 for identification is formed on the front surface 83 side of the nozzle holder 80.
The identification flange 87 has a through hole 88 for identification so as to be visible from the front surface 83 and the back surface 84 side. However, the flange 87 for identification is formed on the upper surface 81 side of the nozzle holder 80. The identification flange 87 may be provided with a through hole for identification so as to be visible from the upper surface 81 and the lower surface 82 side. In this case, it goes without saying that the drilling of the through hole for identification is performed simultaneously with the drilling of the nozzle 86.

[0023]

According to the combustion apparatus of the present invention, the drilling of the nozzle and the drilling of the through hole for identifying the nozzle holder are performed in the same step. And the like can be used to perform both perforations, eliminating errors in identification marks, eliminating defective products, and improving productivity.

Further, if there is a possibility that the nozzle holder that does not correspond to the gas type is wrongly assembled after the nozzle holder is assembled, the nozzle holder is kept in the assembled state without removing the nozzle holder.
Since the identification through-hole can be visually recognized, the nozzle diameter can be determined based on the identification through-hole, and whether or not the nozzle holder corresponds to the gas type can be confirmed.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention and is a front view of a nozzle holder of a water heater.

FIG. 2 shows an embodiment of the present invention and is an overall conceptual diagram of a water heater.

FIG. 3 shows an embodiment of the present invention and is a perspective view of a main part of a water heater.

FIG. 4 shows an embodiment of the present invention and is a front view of a main part of a water heater.

FIG. 5 shows one embodiment of the present invention, and is a rear view of the nozzle holder of the water heater.

FIG. 6 shows an embodiment of the present invention and is a plan view of a nozzle holder of a water heater.

FIG. 7 is a bottom view of the nozzle holder of the water heater, showing one embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Water heater (combustion apparatus) 11 ... Appliance case 12 ... Combustion unit 13 ... Combustion fan 16 ... Exhaust port 17 ... Air chamber 18 ... Combustion chamber 20 ... Heat exchanger 21 ... Heat exchanger case 22 ... Peripheral part of lower opening 23 ... inner wall 30 ... burner 31 ... burner case 32a ... upper member 32 ... peripheral part of upper opening 40 ... fin pipe 45 ... water supply pipe 50 ... fin plate 60 ... gas solenoid valve 65 ... ignition electrode (electrode for ignition) 66 ... Frame rod electrode 80 ... Nozzle holder 85, 86 ... Nozzle 87 ... Flange for identification 88 ... Through hole for identification

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F23D 14/48 F23D 14/08 G09F 7/16

Claims (3)

(57) [Claims] 1. A combustion apparatus in which water in a heat exchanger is heated by a burner so that hot water can be supplied. A nozzle holder for supplying combustion gas to the burner and having a plurality of nozzles. An identification flange is formed on the identification flange, and the detection light passes through the hole during the same process as the drilling of the nozzle so that the type of the nozzle holder can be identified. A combustion device having a hole. 2. The combustion apparatus according to claim 1, wherein the identification through-hole is formed from the same direction as the direction of the nozzle. 3. A method for producing a nozzle holder for supplying combustion gas to a burner, wherein the water in the heat exchanger is heated by a burner so that hot water can be supplied. A flange for identification is formed on the nozzle holder that is held, and the type of the nozzle holder can be identified by passing the detection light through the hole during the same process as the drilling of the nozzle on the flange for identification. A method for manufacturing a nozzle holder for a combustion apparatus, wherein a through hole for identification is formed in the same direction as the direction in which the nozzle is formed.