JPH0311547Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is a thermocouple installation in which a combustion plate with a gas sealing member around the periphery is attached to a burner body, and a thermocouple is provided by penetrating the combustion plate. Regarding equipment.

(Prior art) Conventionally, in this type of device, a through hole is provided in the combustion plate, the tip of the thermocouple is passed through the through hole, and the space between the through hole and the tip is plugged with cement to seal the gas. Those who do are known.

(Problem to be solved by the invention) However, in the conventional method described above, the cement tends to crack when exposed to heat due to the difference in coefficient of thermal expansion with the combustion plate, etc., and therefore has the disadvantage of easily impairing sealing performance. .

(Means for Solving the Problems) The present invention aims to provide a device that can seal gas around thermocouples without using special sealing members such as cement. A combustion plate provided with a gas seal member is attached to the burner body, and a thermocouple is provided by penetrating the combustion plate,
The combustion plate is configured by combining a plurality of divided pieces, and each of the adjacent divided pieces is provided with a recessed portion facing each other to form a housing hole for insertion of the thermocouple,
The thermocouple includes a heat receiving plate provided at its tip;
It is characterized in that the combustion plate is sandwiched between a stopper that is fitted into the base of the combustion plate.

(Function) The present invention has the above configuration, and according to this, the thermocouple is inserted into the insertion hole formed by the recesses provided in each of the adjacent divided pieces so as to face each other, and is inserted into both recesses. Since the periphery is sealed by the gas sealing member, there is no need to use a special sealing part to provide the thermocouple through the combustion plate. Furthermore, since the combustion plate is sandwiched between the heat-receiving plate at the tip of the thermocouple and the stopper fitted into its base, displacement in the vertical direction is reduced.

(Example) Next, an example in which the present invention is applied to a gas water heater having a premix combustion type burner will be described based on the drawings.

In FIGS. 1 to 3, reference numeral 1 denotes a water heater main body having an exhaust port 2 at the front lower part and a combustion case 3 inside. A heat exchanger 5 heated by the burner 4 is provided, a fan 6 is provided above the heat exchanger 5 for supplying a mixture of combustion air and gas to the burner 4, and a space 7 below which concentrates combustion exhaust gas is provided. is formed.

The burner 4 is of a type in which a combustion plate 4b around which a gas sealing member 8 such as Kaol (trade name) is attached is attached to a burner body 4a which is a part of the combustion case 3, and the combustion flame is directed downward. It is formed.

In the figure, reference numeral 9 indicates a gas supply path in which a nozzle portion 9a at the tip faces the suction port of the fan 6, and an electromagnetic proportional valve 10 is interposed in the gas supply path 9.

In the water heater described above, the fan 6 is rotated by the drive of various control devices (not shown) accompanying the ignition operation, and a desired amount of air-fuel mixture is sent to the burner 4, and the burner 4 is ignited to exchange heat. Water supply pipe 1 on the upstream side of container 5
The water sent from 1 is heated in the heat exchanger 5,
Hot water at a predetermined temperature is supplied from a hot water outlet pipe 12 on the downstream side of the heat exchanger 5, and combustion exhaust gas that collects in a space 7 in the combustion case 3 is discharged to the outside from an exhaust port 2 of the water heater main body 1.

Here, in the present invention, the combustion plate 4b is constructed by combining a plurality of divided pieces A, and each of the adjacent divided pieces A has an accommodation hole 14 for insertion of the thermocouple 16.
The recesses 15 forming the thermocouple 16 are provided so as to face each other, so that the thermocouple 16 is inserted into the insertion hole formed by the recesses 15 and
The tip portion 16a is held by the gas seal member 8 provided on the surfaces of both the recesses 15, 15.
The space between the housing hole 14 and the housing hole 14 is gas-sealed.

Furthermore, in the present invention, the tip portion 16a of the thermocouple 16 is
The heat receiving plate 17 provided in the combustion plate 4b
The combustion plate 4b is sandwiched between a so-called speed nut, which is a stopper 18 that is fitted into the base 16b of the thermocouple 16 from above, so that vertical displacement of the thermocouple 16 is completely eliminated. The thermocouple 16 thus installed detects the temperature of the combustion gas, and the detection output controls the opening/closing of the electromagnetic on-off valve 19 disposed upstream of the electromagnetic proportional valve 10 in the gas supply path 9. The rotation speed of the fan 6 is controlled.

(Effect of the invention) As described above, according to the invention, the combustion plate having a gas sealing member around the periphery is constructed by combining a plurality of divided pieces, and each of the adjacent divided pieces has an accommodation hole for insertion of a thermocouple. Since the concave portions forming the thermocouples are provided to face each other, there is no need to use a special sealing member unlike the conventional type when the thermocouple is inserted through the combustion plate, resulting in a simple and inexpensive structure. It has the effect of providing a device. Furthermore, since the combustion plate is sandwiched between the heat-receiving plate at the tip of the thermocouple and the stopper fitted into the base thereof, there is an effect that displacement in the vertical direction is eliminated.

[Brief explanation of the drawing]

Fig. 1 is a cutaway front view showing an example of the implementation of the present invention applied to a gas water heater, Fig. 2 is an exploded perspective view of its main parts, and Fig. 3 is an assembled state of the device shown in Fig. 2. FIG. 4...Burner, 8...Gas seal member, 14...
...Accommodation hole for insertion, 15 ... Recess, 16 ... Thermocouple, 17 ... Heat receiving plate, 18 ... Stopper, A
...Divided piece.

Claims (1)

[Scope of utility model registration request] A combustion plate with a gas sealing member around the periphery is attached to the burner body, and a thermocouple is provided by penetrating the combustion plate, and the combustion plate is constructed by combining a plurality of divided pieces, and the adjacent divided pieces Each of the pieces is provided with a concave portion facing each other to form a housing hole for insertion of the thermocouple. A thermocouple mounting device characterized by being sandwiched.