JPH0341204Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is a heating cooker in which a circulation fan is installed in the cooking chamber to introduce hot combustion air from the combustion chamber into the cooking chamber through an inlet and to discharge exhaust gas from the cooking chamber. Regarding.

(Prior art) A heating cooking method in which a cooking chamber and a combustion chamber are arranged inside the cooking device body, and a circulation fan is installed in the cooking chamber to introduce combustion hot air from the combustion chamber into the cooking chamber and to release exhaust gas from the cooking chamber. For example, the heating cooker disclosed in Japanese Utility Model Publication No. 58-1689 has a problem in which there is a significant shortage of secondary air due to a malfunction in the circulation fan or a blockage of the exhaust port. It is equipped with an abnormal heating detector to prevent the temperature in the cooking chamber and other parts from rising abnormally, creating a dangerous situation if combustion continues under such conditions.

(Problems to be Solved by the Invention) However, in the case where the abnormal heating detector is provided on the outside of the side wall of the cooking chamber facing above the gas burner provided in the combustion chamber, as disclosed in the above publication, Not only is the installation position of the abnormal heating detector limited, but also the combustion hot air of the gas burner cannot be actively guided to the abnormal heating detector, so it is difficult to prevent the circulation fan from stopping or when there is an extremely insufficient amount of secondary air. It is inconvenient that it is difficult to detect this as soon as it occurs.

(Means for Solving the Problems) The purpose of the present invention is to obtain a device that eliminates such problems, and includes a cooking chamber and a combustion chamber equipped with a gas burner inside the cooking device main body. At the same time, in the case where the cooking chamber is provided with a circulation fan that introduces hot air from the combustion chamber into the cooking chamber through an inlet provided at the rear of the combustion chamber and releases exhaust gas from the cooking chamber, the gas burner An opening is provided in the upper wall of the combustion chamber except for the upper part of the rear side, and a duct is provided that runs from the opening toward the side plate side of the cooking device main body, and is opposed to the opening provided at the tip of the duct with a gap therebetween, and A thermoswitch or other abnormal heating detector is provided on a side plate of the cooker body that does not face the side wall of the cooking chamber of the cooker body.

(Function) Cooking with this heating cooker involves putting the food to be cooked into the cooking chamber, then operating the circulation fan and igniting the gas burner to introduce combustion hot air into the cooking chamber and circulating it within the cooking chamber. It is performed while releasing it to the rear and outside.

In the present invention, as long as the circulation fan is rotating normally, secondary air is also introduced through the duct and the opening as shown by the chain line in FIG. As a result, the abnormal heating detector facing the front surface of the duct opening is cooled down.

However, if the circulation fan stops for some reason or the secondary air is extremely insufficient, the hot combustion air will be guided to the abnormal heating detector through the opening and duct as shown by the solid line in Figure 2. , which leads to heating. Therefore, an abnormality caused by a failure of the circulation fan or the like can be detected quickly and reliably.

(Example) An example of implementing the present invention will be explained with reference to the attached drawings.

In the drawings, reference numeral 1 denotes a cooking device main body in which a cooking chamber 2 and a combustion chamber 4 including a gas burner 3 are disposed, and the combustion chamber 4 communicates with the cooking chamber 2 at the rear thereof. A gas burner 3 is installed in the combustion chamber 4 at the rear of the cooking chamber 2.
A circulation fan 5 is provided for guiding combustion hot air into the cooking chamber 2, circulating it through the cooking chamber 2, and then discharging it to the outside.

The configuration up to now is not particularly different from what is conventionally known. In such a case, the present invention provides an opening 6 in the upper wall of the combustion chamber 4 except for the upper rear side of the gas burner 3 of the combustion chamber 4, and the side plate side of the cooking device body 1 from the opening 6 A thermoswitch or other abnormal heating device is installed on the side plate of the cooking device main body 1 that faces the opening 7a provided at the tip of the duct 7 with a gap and does not face the side wall of the cooking chamber 2. The one shown in the figure is equipped with a detector 8.
An opening 6 is provided in the upper wall of one side of the top plate of the combustion chamber 4, and a duct covering the upper surface of the opening 6 and having an inclined upper surface extends from the combustion chamber 4 toward the side plate of the cooking device main body 1. The opening 7a at the tip of the duct 7 and the gap 9
An abnormal heating detector 8 is supported at a side plate position of the cooking device main body 1, which faces the cooking chamber of the cooking device main body 1 and does not face the side wall of the cooking chamber of the cooking device main body. In this case, since the opening 6 is provided in the upper wall of the combustion chamber 4 except for the upper rear side of the gas burner 3 of the combustion chamber 4, the opening 6 is usually
When the hot air is not discharged from the combustion fan 5 and the circulation fan 5 is rotating normally and correctly guiding the combustion hot air to the cooking device as described above, the circulation fan 5
The abnormal heating detector 8 is in a state where it is cooled by the air flow drawn by the air and introduced through the aperture 6, but if an abnormality occurs in the circulation fan 5, etc. When the amount of combustion hot air decreases or stops, the hot air does not flow toward the cooking chamber 2 but is discharged through the opening 6. Since this opening 6 is provided in the upper wall of the combustion chamber 4 except for the rear upper part of the gas burner, if an abnormality occurs in the circulation fan 5, the abnormal heating can be detected quickly through the opening 6. Acts on vessel 8. Therefore, since the amount of heat acting on the abnormal heating detector 8 changes greatly between normal and abnormal conditions, the set temperature of the abnormal heating detector 8 can be relatively low, and a thermoswitch can be used as the detector 8. When used, the set temperature can be set to 200°C or lower, and if the set temperature is 200°C, approximately 1
This can be detected in an extremely short time of 40 seconds if the temperature setting is set at 150℃.

(Effect) According to the present invention, an opening is provided in the upper wall of the combustion chamber except for the rear upper part of the gas burner, a duct is provided from the opening toward the side plate of the cooking device body, and the duct is A thermo switch or other abnormal heating detector is installed on the side plate of the cooking device that faces the opening provided at the tip with a gap and does not face the side wall of the cooking chamber of the cooking device. The detector is not easily affected by heat from the cooking chamber, and if the circulation fan is normal and the secondary air supply is normal, the air flow introduced through the opening will detect the abnormality. The heating detector is cooled down, but if the circulation fan stops or the supply of secondary air becomes severely insufficient, the hot combustion air is quickly discharged through the opening and acts on the abnormal heating detector. Since the amount of heat acting on the abnormality detector changes greatly between normal and abnormal conditions, abnormalities can be detected relatively quickly, and in particular, the duct can concentrate combustion hot air on the abnormal heating detector, making it easy to detect abnormalities. In addition to being reliable, the setting position of the abnormal heating detector can also be selected relatively freely.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the present invention, and FIG. 1 is a cutaway side view, FIG. 2 is a cutaway sectional view taken along the line 2, and FIG. 3 is a slope view of the main part. 1...Cooker body, 2...Cooking chamber, 3...Gas burner, 4...Combustion chamber, 5...Circulation fan, 6...
...Open hole, 7...Duct, 8...Abnormal heating detector.

Claims (1)

[Scope of utility model registration request] A cooking chamber and a combustion chamber equipped with a gas burner are disposed in the cooking device main body, and hot combustion air from the combustion chamber is introduced into the cooking chamber through an inlet provided at the rear of the combustion chamber,
In addition, in a cooking chamber equipped with a circulation fan for discharging exhaust gas from the cooking chamber, an opening is provided in the upper wall of the combustion chamber except for the rear upper part of the gas burner, and the side plate of the cooking appliance body is opened through the opening. A duct facing the side is provided, and a thermoswitch or other abnormal heating device is installed on the side plate of the cooking device that faces the opening provided at the tip of the duct with a gap and does not face the side wall of the cooking chamber of the cooking device. A heating cooker equipped with a detector.