JPS5981430A - Heating device - Google Patents

Abstract

PURPOSE:To lower the temperatures of an exhaust tube, an exhaust guide and in their vicinities and consequently lower the temperature of a wall surface near the exhaust guide and reduce the sectional area of the exhaust tube by a method wherein the air produced by a self-cooled fan is rendered to flow along the rear of the exhaust tube at the rear of the exhaust tube so as to wrap the exhaust tube with the air. CONSTITUTION:Cooling air is sucked from suction holes 5a provided on the back of a main body casing 5, flowed along the rear of an exhaust tube 7, past through an exhaust guide 6, and discharged outside. The temperatures of the rear of the exhaust guide 6 and of the wall surface 12 near the exhaust guide 6 are lowered remarkably by shutting-off the high temperature exhaust (200 deg.C or more) discharged from the exhaust tube 7 with the comparatively low temperature air (nearly 50 deg.C) produced by a self-cooled fan 4b. In addition, the temperature of the exhaust tube 7 itself is also lowered, because the air produced by said self-cooled fan 4b is forcibly blown through the rear of the exhaust tube 7.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Application of Industrial Soil The present invention relates to heating devices such as gas ovens and electric ovens.

Structure of the conventional example and its problems In the conventional example, in Fig. 1, the heating chamber 1 and the combustion chamber 2 are
The exhaust gas is directly discharged through an exhaust pipe 4 from the rear upper part of the outer shell 3 of the main body. For this reason, the temperature of the exhaust pipe 4 and its vicinity becomes extremely high, causing the temperature of the adjacent wall to rise, and the cross-sectional area of the exhaust pipe 4 also needs to be large in order to lower the temperature. make it thicker,
In addition to requiring a large installation space, there were problems such as cost amplifiers.

OBJECTS OF THE INVENTION The present invention (d) solves the above-mentioned conventional drawbacks, and aims to reduce the temperature of the exhaust stack and its vicinity, and to make the heating device more compact by reducing the cross-sectional area of the exhaust stack.

Structure of the Invention In order to achieve the above object, the present invention provides a combustion chamber behind the heating chamber, a circulation fan for feeding hot air into the heating chamber, a motor for driving the circulation fan, and a motor for driving the motor. A cooling fan is provided at the rear of the combustion chamber, and an exhaust pipe is provided by joining to the opening provided at the upper part of the combustion chamber,
In addition to providing an exhaust opening at the rear upper part of the outside of the main body,
An exhaust guide that guides the exhaust gas upward is joined to the exhaust opening, the exhaust pipe is passed through the exhaust opening, and the exhaust pipe is sandwiched between the exhaust pipes so that the air from the self-cooling fan flows through the exhaust pipe at the rear of the exhaust pipe. The structure allows the flow to flow along the ridges of the exhaust pipe, which lowers the temperature of the exhaust pipe, the exhaust guide, and the vicinity thereof, lowers the temperature of the wall near the exhaust guide, and reduces the cross-sectional area of the exhaust pipe. It has the following.

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

In Figures 2 to 4, 1 is a heating chamber that heats the object to be heated, 2 is a combustion chamber provided after the heating chamber 1, 3 is a burner, 4 is a circulation fan that sends hot air into the heating chamber 1, and 4a is a The driving motor for the circulation fan 4, 4b, is a self-cooling fan for the motor 4a, and the air intake hole 5 is provided on the rear surface of the outer cover 6 of the main body.
Cooling air is sucked in as shown by the arrow a, and 5b is an exhaust opening provided at the rear upper part of the outer shell 6 of the main body, to which is connected an exhaust guide 6 for guiding the exhaust to the upper part. An exhaust pipe 7 is connected to an opening 2a provided in the upper part of the combustion chamber 2, and passes through the exhaust opening 5b.

A magnetron 8 is connected to the heating chamber 1 through a waveguide 9. 10 is a door for opening and closing the heating chamber 1; 11 is a partition plate provided on the upper surface of the heating chamber 1;

FIG. 3 is a top view showing the movement of hot air between the heating chamber 1 and the combustion chamber 2 by the circulation fan 4, and FIG. 4 is an external perspective view showing the main body with the outer cover 5 removed.

Hereinafter, the effects of the above configuration will be explained.

In FIG. 2, an intake hole 6 provided on the rear surface of the outer cover 5 of the main body
Inhale cooling air from a as shown by the arrow.

It flows along the rear part of the exhaust pipe 7 and flows out through the exhaust guide 6 to the outside. The high-temperature exhaust gas (2oO°C or higher) coming out through the exhaust pipe 7 is closed by the relatively cold air (about 50°C) from the self-cooling fan 4b, so that the rear surface of the exhaust guide 6 and the Exhaust guide 6
The temperature of the wall surface 12 in the vicinity of
By forcing the wind b to blow through the ridge of the exhaust pipe 7, the temperature of the exhaust pipe itself can be lowered, and the temperature of the exhaust pipe itself can be lowered. , there is an advantage that there is no need to increase the cross-sectional area of the exhaust pipe 7.

Next, as shown in FIG. 5, even when the main body is assembled and installed in the cabin door 12, the safety with respect to the rear wall 13 is high, and the whole can be made compact.

Effects of the Invention According to the present invention, the following effects can be obtained.

1. It is safe against fire because the temperature of the rear wall near the exhaust guide can be lowered.

2. Space can be saved because the cross-sectional area of the exhaust pipe and exhaust guide does not need to be very large.

3. The temperature near the exhaust stack and exhaust guide is lowered, so
Product durability is improved.

[Brief explanation of drawings]

Figure 1 is a side view of a conventional heating device, and Figure 2 is a side view of a conventional heating device.
The figure is a side sectional view of a heating device which is an embodiment of the present invention, FIG. 3 is a schematic plan sectional view of the heating device, FIG. FIG. 2 is a side view showing the device installed in a cabinet. 1... Cut heat chamber, 2- Combustion chamber, 4 Circulation fan, 4b- Natural cooling fan, 6 Outside the main body, 6.
-Exhaust guide, 7...-Exhaust pipe. Name of agent: Patent attorney Toshio Nakao and 1 other person
1 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] a combustion chamber provided at the rear of the heating chamber; a circulation fan provided in the combustion chamber and feeding hot air into the heating chamber;
A motor that drives the circulation fan and a self-cooling fan of the motor are separated for 1 second, and the motor and the self-cooling fan are provided at the rear of the combustion chamber, and are connected to an opening provided at the upper part of the combustion chamber for exhaust. A cylinder is provided, and an exhaust opening is provided at the rear upper part of the outside of the main body, and the exhaust stack is provided within the exhaust opening, so that the air from the self-cooling fan flows along the rear part of the exhaust stack. A heating device configured to allow water to flow.