JPS60240946A - Instantaneous gas hot water supplier with preventer for imperfect combustion - Google Patents

Abstract

PURPOSE:To permit all kinds of city gases to be set up with exchangeability and commonability by providing a dumper with regulable opening diameter to the surronding of an inverse bias thermocouple attached to a part of a combustion chamber. CONSTITUTION:An inverse bias thermocouple is positioned on a part of a heat exchanger 8, and a dumper is provided on the surrounding of the thermocouple. The dumper consists of an inner dumper 9 with the largest opening 11 for all kinds of gases and outer dumper 10 with an opening 12 set to each of gas varieties in a double structure. The size of the opening 12 can be regulated by one touch in such a way as to obtain temperatures matching cut-off voltage in the blocking of the fins of the heat exchanger. Cut-off points in the blocking of the fins can thus be simply set up for all kinds of gases and easily regulated by one touch when exchanging the kinds of gases.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a gas instantaneous water heater equipped with an incomplete combustion prevention device, and particularly relates to a configuration that allows one-touch setting of a detection system for heat exchanger fin clogging for any type of gas. It is.

Structure of the conventional example and its problems FIG. 1 shows the structure of the conventional example, in which (a) is a front view, (b) is a side view, and (c) is a top view. The explanation will be given below according to the diagram.

A gas-air mixture ignited by an ignition source is combusted by a main burner 1, and exhaust gas is discharged from a combustion chamber 2 and a fin portion 3 through a 6. Here, when the fin part 3 becomes clogged due to long-term use of the appliance, 002 in the exhaust gas is transferred to the flame of the pilot burner through the reflux pipe 5 installed toward the pilot burner 4 from a position where the pressure in the combustion chamber can be detected. Spray,
At that time, a reverse bias thermocouple 6 attached to a part of the combustion chamber 2 senses the atmospheric temperature inside the combustion chamber 2, and reduces the difference in electromotive force generated with the pilot flame thermocouple 7 attached to the pilot burner 4. and shut off the gas.

At this time, since the ambient temperature of the reverse bias thermocouple 6 differs depending on the gas type, it is necessary to adjust the insertion distance l of the thermocouple to match, and the specifications must be changed for each gas type.
In addition to being inferior in mass production, there were also problems with low reliability.

Purpose of the Invention 3 - The present invention is to easily set specifications for each gas type as seen in the conventional example with compatibility and common use, and to provide a highly reliable gas instantaneous hot water bath with an incomplete combustion prevention device. The purpose is to provide boilers.

Structure of the Invention In order to achieve the above object, the present invention provides a damper that allows adjustment of the hole diameter around a reverse bias thermocouple attached to a part of the combustion chamber, making it compatible and common to all types of city gas. It is structured so that it can be set according to the characteristics of the user.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 shows an embodiment of the present invention. A reverse bias thermocouple faces a part of the heat exchanger 8, and a damper is provided around it. On the inside is the inner damper 9 set to the largest hole 11 for all gas types, and on the outside is the outer damper 9 with holes 12 set according to each type of gas. They are stacked one on top of the other to form a double structure, and the size of the hole 12, which has a temperature that matches the cut-off voltage for clogging of the heat exchanger filler, can be adjusted with a single touch depending on the type of gas.

Effect of the invention The present invention has the following effects.

(1) Cut-off points for all gas types when fins become clogged can be easily set.

(2) Easy one-touch adjustment when converting waste type.

(■ Provides compatibility and common use between gas types.

[Brief explanation of drawings]

Figure 1 shows the configuration of a conventional example, Figure 1 (A) is a front view, Figure 1 (B) is a side view, Figure 1 (C) is a top view, and Figure 2 is an embodiment of the present invention. The sectional view shown in FIG. 3 is a perspective view showing one embodiment of the present invention. 1... Main burner, 2... mmL 3...
Fin section, 4... Pilot burner, 5... Reflux tube, 6... Reverse bias thermocouple, 7... Pilot flame thermocouple, 8... Heat exchanger inner shell, 9 ...Inner damper, 1
0...Outer damper, 11.12...Adjustment hole. Name of agent: Patent attorney Toshio Nakao (1 person)

Claims (1)

[Claims] A recirculation tube is arranged toward the pilot burner from a position where the pressure in the combustion chamber can be detected, and the configuration utilizes the difference in electromotive force generated between two thermocouples, and a reverse bias system is used to sense the temperature inside the combustion chamber. Place the thermocouple in the wake of the main burner flame under the fins of the heat exchanger, insert it into the hole that penetrates the combustion chamber, and surround the front and reverse bias thermocouple with an adjustable damper in the hole. A gas instantaneous water heater with an incomplete combustion prevention device.